Nothing Special   »   [go: up one dir, main page]

USRE40559E1 - Radiating device for hyperthermia - Google Patents

Radiating device for hyperthermia Download PDF

Info

Publication number
USRE40559E1
USRE40559E1 US09/923,279 US92327994A USRE40559E US RE40559 E1 USRE40559 E1 US RE40559E1 US 92327994 A US92327994 A US 92327994A US RE40559 E USRE40559 E US RE40559E
Authority
US
United States
Prior art keywords
catheter
antenna
radiating
fluid
radiating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/923,279
Other versions
US20020077625A1 (en
Inventor
Avigdor Lev
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Medical Enterprises Ltd
Original Assignee
Medical Enterprises Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Medical Enterprises Ltd filed Critical Medical Enterprises Ltd
Priority to US09/923,279 priority Critical patent/USRE40559E1/en
Assigned to MEDICAL ENTERPRISES LIMITED reassignment MEDICAL ENTERPRISES LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AIDA ENGINEERING LIMITED
Application granted granted Critical
Publication of USRE40559E1 publication Critical patent/USRE40559E1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/12Devices for heating or cooling internal body cavities
    • A61F7/123Devices for heating or cooling internal body cavities using a flexible balloon containing the thermal element
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00Radiation therapy
    • A61N5/02Radiation therapy using microwaves
    • A61N5/04Radiators for near-field treatment
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00Radiation therapy
    • A61N5/02Radiation therapy using microwaves
    • A61N5/04Radiators for near-field treatment
    • A61N5/045Radiators for near-field treatment specially adapted for treatment inside the body

Definitions

  • This invention concerns a radiating device for hyper-thermia and, more particularly, a radiofrequency radiating device, for hyperthermal treatment of tumors of the bladder.
  • Devices for hyperthermal treatment of various human body illnesses are already known, and they use heating liquids, light radiation, radiofrequency antennas, thermistors, and so on.
  • U.S. Pat. No. 4,776,334 describes a catheter for treating tumors by inserting within the tumor to be treated a radiofrequency device provided with temperature sensors.
  • French patent application 2600205 concerns an apparatus for light irradiation of a cavity with the help of an inflatable balloon and of light sensors.
  • German patent application No. 2,848,636 claims usage of a heated liquid which is circulated in a closed loop by means of a pump within a body cavity, wherein the liquid temperature is controlled by an external thermostat
  • EP-A-0 370 890 discloses a radiating urathral urethral device for hyperthermia including a catheter provided with an inflatable balloon and adapted to receive one or more liquid flows passing therethrough, a radiofrequency radiating antenna, and one or more thermocouples, the radiating antenna being submerged within one said liquid flow coming back from the closed terminal end of the antenna.
  • the radiating device comprises in addition a separate rectal control means.
  • GB-A-2 045 620 relates to an applicator for hyperthermia comprising a rectal radiating probe and a spaced apart transurethral catheter including a temperature sensing means and an inflatable balloon.
  • U.S. Pat. No. 4,957,765 discloses a transurethral radiating applicator for hyperthermia including a multi-tubes balloon type catheter comprising closed and cubes end tubes respectively surrounding a helical coil antenna and a temperature sensor, as well as a passive drainage tube for urine.
  • the device substantially comprises a flexible triple path catheter carrying a radiofrequency radiating antenna, sealingly sheathed together with the shielded cable providing power supply and with several thermocouples within a plastic casing and surrounded by a flow of liquid; a second path carries the power supply cables for several outer thermocouples, which are flooded by return flow of said liquid, and a third path allowing a fluid to flow through in order to inflate a balloon located near the catheter distal end, once the latter has been introduced into the cavity to be treated.
  • FIG. 1 shows schematically, in an enlarged scale, the distal end of the device according to this invention, which has to be introduced into a natural cavity of the human body;
  • FIG. 1A shows an enlarged schematic cross-section of the device according to this invention, taken along line A—A of FIG. 1 ;
  • FIG. 2 is a schematic of some structural details of a radiofrequency antenna shown in general within the device of FIG. 1 ;
  • FIG. 2A shows a schematic enlarged cross-section of the radiating antenna, taken along line A—A of FIG. 2 ;
  • FIG. 3 is a schematic of the proximal end of the device according to this invention, opposite to the distal end shown in FIG. 1 ;
  • FIG. 4 is a plot of the intensity of the radiation generated by the radiating antenna of FIG. 2 , along the longitudinal axis thereof;
  • FIG. 5 shows schematically the distal end of the device of FIG. 1 , as it is seen after having been introduced into a urinary bladder;
  • FIG. 6 shows schematically the structure at the distal end of the device shown in FIG. 1 , when ready for introduction into the organ to be treated.
  • the device according to this invention has a shape and consistency of a flexible catheter whose distal end, as it is shown in FIG. 1 , encloses therewithin an antenna 1 surrounded by a flow of liquid 2 which is introduced into the bladder through an opening 3 and, after being freely circulated within said bladder, is again sucked into the catheter through an opening 4 .
  • Said opening 4 is in communication with a second way or catheter side channel 5 housing the leads of several thermocouples, like for instance 6 , 6 ′, 6 ′′ adapted to be deflected outwards by inflating a balloon 7 in which a gaseous fluid or a liquid is made to flow through a third path or side channel 8 and through an end opening 9 .
  • the catheter opposite (proximal) end ( FIG. 3 ) whose tip is shown in FIG. 1 , has three diverging inlets corresponding to the three paths or channels 2 , 5 , 8 of said catheter.
  • center inlet 10 there is inserted with a pressure fit a plug 11 provided with a center through passage and with a side branch 13 ; in center passage 12 of plug 11 there is in turn pressure fitted a second plug 14 which is provided as well with a center opening 15 .
  • Shielded cable 16 supplying power to antenna 1 runs through the center passages 12 and 15 of said two coaxially arranged plugs, while side branch 13 is provided as an inlet and an outlet of a conditioning fluid flowing along channel 2 .
  • Thermocouple power supply cables 6 , 6 ′, 6 ′′ are laid through said entrance 17 provided with a branch 18 , and they run along side path or channel 5 having said conditioning liquid flowing in a reverse direction therethrough, said liquid entering and exiting in turn through said branch 18 .
  • the other side entrance 19 is provided with a one-way valve 20 for introducing the fluid that, flowing along second side channel 8 , is used to inflate balloon 7 .
  • a heat exchanger 31 Slightly downstream from said three entrances 10 , 17 , 19 there is provided, in a sleeve-like fashion and in intimate contact around the catheter body, a heat exchanger 31 , operated in a known fashion from outside, and used to cool or to heat said conditioning liquid flowing through central channel 2 and coming back through side channel 5 , or viceversa.
  • the useful radiating portion of linear dipole antenna 1 comprises a terminal coil-shaped segment 21 of central conductor 22 which, immediately upstream from coil 21 is tightly surrounded, in sequence, by a first plastic inner sleeve 23 , by a metal braiding 24 , by a second intermediate plastic sleeve 25 , by a metal cylinder 26 electrically connected with shield 24 , and eventually by an outer plastic sleeve 27 .
  • thermocouples located in a way suitable to detect the operating temperatures in predetermined positions of the antenna and of the power supply cable thereof.
  • a first thermocouple 28 may be located in the position of the stretch of catheter which will be located at the prostatic urethra when the catheter with its antenna are inserted within the bladder; a second thermocouple 29 slightly upstream from antenna 1 , at the bladder neck, while a third thermocouple 30 is located close to central conductor 22 , between metal cylinder 26 and end coil 21 , after having been wrapped with one or more coils around shield 24 immediately upstream from intermediate sleeve 25 and metal cylinder 26 , and a second time, with a larger number of coils, around the stretch of central lead 22 projecting out of metal cylinder 26 before winding up to form end coil 21 , the stretch of thermocouple 30 power supply cable connecting said two points being inserted with intimate contact between intermediate sleeve 25 and metal cylinder 26 .
  • the end stretches of the power supply cables, immediately ahead of the thermocouples, are wrapped in a number of helical coils in order to increase the thermal capacity and the radiofrequency resistance of the ends which are designated to detect the temperature, while reducing to a minimum, or completely avoiding the dispersive thermal conduction along said cables.
  • FIG. 1A which shows schematically a cross-section of the catheter according to this invention, taken in any position of the stretch going from heat exchanger 31 to intermediate sleeve 25 , there is shown side channel 5 carrying the power supply cables of thermocouples 6 , 6 ′, 6 ′′ and side channel 8 for the flow of the fluid used to inflate balloon 7 , both said channels 5 and 8 being managed within the thickness of the actual catheter whose inner bore 2 intended for the flow of the conditioning liquid carries, in a central position, shielded cable 16 comprised of central conductor 22 , inner sleeve 23 , shield 24 and outer sleeve 27 , as well as inner thermocouples 28 , 29 and 30 power supply cables (not shown).
  • FIG. 2A is a schematic cross-section of antenna 1 , taken along line A—A of FIG. 2 .
  • the following are shown therein, starting from the center: conductor 22 , inner sleeve 23 , metal shield 24 , an intermediate sleeve 25 , a metal cylinder 26 , and outer sleeve 27 , as well as thermocouple 30 power supply conductor.
  • FIG. 4 is a diagram showing the radiation intensity starting from the coil-shaped end 21 of antenna 1 towards shielded power supply cable 22 , 16 . As it is shown, intensity is a maximum when passing from radiating coil 21 to the stretch protected by metal cylinder 26 , and it tends to nil at the position of shielded cable 16 .
  • FIG. 5 There is shown schematically in FIG. 5 the longitudinal section of the catheter provided with a radiating antenna according to this invention, once it has been introduced into the bladder, in an operative condition.
  • the catheter, carrying the radiating antenna there-within is introduced into bladder 32 through the urethra, in such a way that the rear end of protective metal cylinder 26 is located approximately at the bladder neck, in the transition area between prostata prostrate 33 and bladder 32 , while simultaneously taking care that the catheter front end does not subject the bladder internal wall to any pressure.
  • conditioning liquid 2 preferably comprising a solution of a selective citotoxicity cytotoxicity substance, which is accordingly forced to circulate through the bladder coming out from opening 3 and going back through opening 4 , or viceversa, along side channel 5 which carries the power supply cables of thermocouples 6 , 6 ′, 6 ′′ therewithin.
  • the liquid forced circulation provided by the variable flowrate supply pump, suitably combined with an outer balancing and degassing chamber, allows the volume of liquid within the bladder to be balanced at will, in such a way as to compensate the pathological or physiological urine production, while thoroughly ejecting the gases generated or unwillingly introduced in circulation, out of the bladder, in order to prevent irradiation non-uniformities which would otherwise be caused by coexistance of anisotropic media.
  • ballon 7 is inflated by introducing a fluid, which may be a gas but it is preferably a liquid, along side channel 8 and through the end opening 9 thereof; ballon 7 inflated as mentioned above, pushes then against outer thermocouples 6 , 6 ′, 6 ′′ power supply cables thereby moving said thermocouples into tangential engagement against bladder wall 32 in different positions, in order to detect the temperatures prevailing therein as caused by irradiation generated by antenna 1 .
  • the possibility of changing the location and the number of the outer thermocouples enables the thermocouples to be positioned at will, on the bladder wall, or in any case place of the body organ to be treated, while being able to individually check the temperatures in the various locations.
  • the inflated ballon 7 protects the bladder neck wall from an excess heat caused by the proximity of the radiating antenna, and in the meantime it prevents the catheter from being accidentally displaced or from coming out through the bladder neck.
  • antenna 1 The dimensions of antenna 1 are such that it may be freely positioned along the catheter while being obviously wholly contained within the human bladder to be treated, but in the meantime they must be suitable to generate a therapeutically active radiation, in order to reach the temperatures considered lethal for the cancer cells. Since the physical length of an antenna is related to the virtual electrical length thereof through an equation involving the impedance of said antenna, as well as the impedance deriving from the environment irradiated by the antenna, the antenna electrical length comes out to be inversely proportional to the irradiated medium conductivity. Accordingly, since the conductivity of an aqueous solution is for instance many times higher than the conductivity of air, when operating in an aqueous environment it is possible to use an antenna which is physically quite shorter than the length needed if it were necessary to operate in air.
  • the dipole according to this invention corresponds to a dipole of the quarter wave type and in the aqueous environment comprising the solution filled bladder, it makes it possible to operate at frequencies in the range of 900-1000 MHz; in particular, a frequency of 915 MHz has been chosen since very different frequencies would result in penetration, intensity, and other effects not always exactly predictable and controllable in the body tissues, since in general high frequencies have a low penetration power and therefore they do not provide the desired local heating, while lower frequencies, having a higher penetration power, may get deeper tissues involved and damaged.
  • the supply cable end stretches close to the thermocouples are wound into an helical shape whereby the temperature measured in the various sensing points is a reliable data, unaffected by said influences.
  • the above structure construction prevents measuring errors due to conduction, it provides a reliable temperature indication, for instance exactly in the area of the dipole power supply position in the case of thermocouple 30 , and it reduces in an extremely effective manner the thermocouple self-heating process due to radiofrequencies, also when there is an extremely high concentration of energy, whereby said structures are almost unaffected by the disturbances in the radio-frequency field.
  • the energy losses due for instance to self-heating of the antenna power supply cable are particularly high, for instance in the range of 20-40%. Since this undesirable self-heating, due to the Joule effect, might cause excessive heating of the urethral walls, and accordingly a discomfort for the patient subjected to treatment, or even damages to the tissues, the antenna cable, and the antenna itself are continuously cooled, while in operation, by using the conditioning liquid flow directed to the bladder and then withdrawn again therefrom, whereby a simultaneous control action is obtained, for controlling the temperature prevailing both in the liquid within the bladder and along the urethra. Temperature control is effected by variations of the conditioning liquid supply flow and of the cooling source temperature. In such a way it is possible both to increase the temperature and to withdraw heat.
  • the power supply cables thereof are reinforced along their whole length by inserting within the protecting sheath thereof a thin stainless steel wire providing them with the required rigidity and flexibility.
  • the presence of said reinforcing wire provides as well he the thermocouple power supply cables with the mechanical strength necessary to bear the compressive and tensile stresses caused when the cables are inserted within side channel 5 , and when thermocouples 6 , 6 ′, 6 ′′ are laid in the desired locations.
  • thermocouples 6 , 6 ′, 6 ′′ projecting upstream of balloon 7 through opening 4 are temporarily locked by inserting them, downstream of balloon 7 , in one or more notches provided, as the case may be, in suitable positions according to the different body organ or the particular patient to be treated, close to the catheter end, as it is shown in FIG. 6 .
  • balloon 7 When balloon 7 is inflated it causes the thermocouple ends to come out from the notches and then to deflect outwards until the thermocouple tips come into engagement with the bladder wall.
  • thermocouples 6 , 6 ′, 6 ′′ causes the ends of the respective power supply cables comprising the actual thermocouple, to tangentially engage the bladder wall, whereby no excessive concentrated pressures are generated.
  • the tangential position taken by the thermocouple tips when contacting the bladder wall makes it possible to measure the actual temperature of the wall position considered in that at the boundary between said wall and the liquid filling the bladder there is a thin liquid layer substantially stationary, which is not affected by the liquid circulation within the bladder, since it clings to the tissue because of a physical attraction, while the coil shape of the cable terminal stretches increases the thermal capacity of the thermocouple whose diameter, inclusive of the coils, is less than 0,7 mm whereby the thermocouple is completely submerged within the liquid stationary layer having a thickness of approximately 1 mm.
  • thermocouples After the thermocouples have been deflected outwards within the bladder, it is still possible to modify their location by performing pushing and/or pulling actions on the reinforced power supply cables, as mentioned above, and possibly by rotating the catheter containing them. Control of the temperature detected on the bladder walls and/or within the circulating liquid mass, is obtained by changing the flowrate of said liquid from few cubic centimeters per minute to several tens of cubic centimeters per minute.
  • the circulated fluid circulating system prevents permanence or formation and build-up of possible gas bubbles within the bladder or through the circuit, in that air or other gas bubbles having possibly formed or being already present, are entrained out by the continuous flow and exhausted to the outer environment in an appropriate position of the outer pumping circuit.
  • the liquid circulation provided as above presents prevents the antenna and the environment thereof from overheating, therefore from causing undesirable reactions within the circulating liquid.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Radiology & Medical Imaging (AREA)
  • Electromagnetism (AREA)
  • Otolaryngology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Thermal Sciences (AREA)
  • Vascular Medicine (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Radiation-Therapy Devices (AREA)
  • Electrotherapy Devices (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Heat Treatment Of Articles (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

A flexible three-paths catheter provided with a balloon carries a sealingly sheathed radiofrequency radiating antenna, together with the shielded power supply cable and with some thermocouples, within a plastic lining surrounded by a flow of liquid; a second path carries the power supply cables of some outer thermocouples, flooded by the reverse liquid flow, while the third path allows a fluid to flow through for inflating the balloon.
Introduction of the catheter into a hollow organ makes it possible to perform hyperthermal therapy of tumors by means of radiation.

Description

CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of reissue application No. 08/889,825, filed on Jul. 8, 1997, now U.S. Pat. No. RE37,315, which is a reissue of U.S. Pat. No. 5,431,648 based on application No. 08/232,190, filed May 3, 1994.
BACKGROUND OF THE INVENTION
This invention concerns a radiating device for hyper-thermia and, more particularly, a radiofrequency radiating device, for hyperthermal treatment of tumors of the bladder.
Devices for hyperthermal treatment of various human body illnesses are already known, and they use heating liquids, light radiation, radiofrequency antennas, thermistors, and so on.
U.S. Pat. No. 4,776,334 describes a catheter for treating tumors by inserting within the tumor to be treated a radiofrequency device provided with temperature sensors.
French patent application 2600205 concerns an apparatus for light irradiation of a cavity with the help of an inflatable balloon and of light sensors.
In U.S. Pat. No. 4,154,246 there is described a radiofrequency resonating circuit which is introduced in natural cavities of the body or directly inserted into the tumoral mass.
German patent application No. 2,848,636 claims usage of a heated liquid which is circulated in a closed loop by means of a pump within a body cavity, wherein the liquid temperature is controlled by an external thermostat EP-A-0 370 890 discloses a radiating urathral urethral device for hyperthermia including a catheter provided with an inflatable balloon and adapted to receive one or more liquid flows passing therethrough, a radiofrequency radiating antenna, and one or more thermocouples, the radiating antenna being submerged within one said liquid flow coming back from the closed terminal end of the antenna. The radiating device comprises in addition a separate rectal control means.
GB-A-2 045 620 relates to an applicator for hyperthermia comprising a rectal radiating probe and a spaced apart transurethral catheter including a temperature sensing means and an inflatable balloon. U.S. Pat. No. 4,957,765 discloses a transurethral radiating applicator for hyperthermia including a multi-tubes balloon type catheter comprising closed and cubes end tubes respectively surrounding a helical coil antenna and a temperature sensor, as well as a passive drainage tube for urine.
It is an object of this invention to provide a device for hyperthermal treatment of tumors within natural cavities of the human body, which gathers the advantages of the known devices while being free from their drawbacks.
SUMMARY OF THE INVENTION
The device according to this invention substantially comprises a flexible triple path catheter carrying a radiofrequency radiating antenna, sealingly sheathed together with the shielded cable providing power supply and with several thermocouples within a plastic casing and surrounded by a flow of liquid; a second path carries the power supply cables for several outer thermocouples, which are flooded by return flow of said liquid, and a third path allowing a fluid to flow through in order to inflate a balloon located near the catheter distal end, once the latter has been introduced into the cavity to be treated.
This invention will be described more particularly in the following based on a specific embodiment thereof reported herein for exemplary and non limiting purposes, as well as on the attached schematic drawings. In connection with the above it should be pointed out that in said drawings the parts shown are not to scale and the mutual dimensions are out of proportion, the members having in fact a very thin cross-section.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows schematically, in an enlarged scale, the distal end of the device according to this invention, which has to be introduced into a natural cavity of the human body;
FIG. 1A shows an enlarged schematic cross-section of the device according to this invention, taken along line A—A of FIG. 1;
FIG. 2 is a schematic of some structural details of a radiofrequency antenna shown in general within the device of FIG. 1;
FIG. 2A shows a schematic enlarged cross-section of the radiating antenna, taken along line A—A of FIG. 2;
FIG. 3 is a schematic of the proximal end of the device according to this invention, opposite to the distal end shown in FIG. 1;
FIG. 4 is a plot of the intensity of the radiation generated by the radiating antenna of FIG. 2, along the longitudinal axis thereof;
FIG. 5 shows schematically the distal end of the device of FIG. 1, as it is seen after having been introduced into a urinary bladder; and
FIG. 6 shows schematically the structure at the distal end of the device shown in FIG. 1, when ready for introduction into the organ to be treated.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The device according to this invention has a shape and consistency of a flexible catheter whose distal end, as it is shown in FIG. 1, encloses therewithin an antenna 1 surrounded by a flow of liquid 2 which is introduced into the bladder through an opening 3 and, after being freely circulated within said bladder, is again sucked into the catheter through an opening 4. Said opening 4 is in communication with a second way or catheter side channel 5 housing the leads of several thermocouples, like for instance 6, 6′, 6″ adapted to be deflected outwards by inflating a balloon 7 in which a gaseous fluid or a liquid is made to flow through a third path or side channel 8 and through an end opening 9.
The catheter opposite (proximal) end (FIG. 3) whose tip is shown in FIG. 1, has three diverging inlets corresponding to the three paths or channels 2, 5, 8 of said catheter. Within center inlet 10 there is inserted with a pressure fit a plug 11 provided with a center through passage and with a side branch 13; in center passage 12 of plug 11 there is in turn pressure fitted a second plug 14 which is provided as well with a center opening 15. Shielded cable 16 supplying power to antenna 1 runs through the center passages 12 and 15 of said two coaxially arranged plugs, while side branch 13 is provided as an inlet and an outlet of a conditioning fluid flowing along channel 2. Thermocouple power supply cables 6, 6′, 6″ are laid through said entrance 17 provided with a branch 18, and they run along side path or channel 5 having said conditioning liquid flowing in a reverse direction therethrough, said liquid entering and exiting in turn through said branch 18. The other side entrance 19 is provided with a one-way valve 20 for introducing the fluid that, flowing along second side channel 8, is used to inflate balloon 7.
Slightly downstream from said three entrances 10, 17, 19 there is provided, in a sleeve-like fashion and in intimate contact around the catheter body, a heat exchanger 31, operated in a known fashion from outside, and used to cool or to heat said conditioning liquid flowing through central channel 2 and coming back through side channel 5, or viceversa.
Referring now to FIGS. 2 and 2A, radiating antenna 1 will be described more in detail; the useful radiating portion of linear dipole antenna 1 comprises a terminal coil-shaped segment 21 of central conductor 22 which, immediately upstream from coil 21 is tightly surrounded, in sequence, by a first plastic inner sleeve 23, by a metal braiding 24, by a second intermediate plastic sleeve 25, by a metal cylinder 26 electrically connected with shield 24, and eventually by an outer plastic sleeve 27.
Immediately beneath sleeve 27 there is provided the power supply cables for several thermocouples located in a way suitable to detect the operating temperatures in predetermined positions of the antenna and of the power supply cable thereof. For instance, a first thermocouple 28 may be located in the position of the stretch of catheter which will be located at the prostatic urethra when the catheter with its antenna are inserted within the bladder; a second thermocouple 29 slightly upstream from antenna 1, at the bladder neck, while a third thermocouple 30 is located close to central conductor 22, between metal cylinder 26 and end coil 21, after having been wrapped with one or more coils around shield 24 immediately upstream from intermediate sleeve 25 and metal cylinder 26, and a second time, with a larger number of coils, around the stretch of central lead 22 projecting out of metal cylinder 26 before winding up to form end coil 21, the stretch of thermocouple 30 power supply cable connecting said two points being inserted with intimate contact between intermediate sleeve 25 and metal cylinder 26.
In any case, the end stretches of the power supply cables, immediately ahead of the thermocouples, are wrapped in a number of helical coils in order to increase the thermal capacity and the radiofrequency resistance of the ends which are designated to detect the temperature, while reducing to a minimum, or completely avoiding the dispersive thermal conduction along said cables.
In FIG. 1A, which shows schematically a cross-section of the catheter according to this invention, taken in any position of the stretch going from heat exchanger 31 to intermediate sleeve 25, there is shown side channel 5 carrying the power supply cables of thermocouples 6, 6′, 6″ and side channel 8 for the flow of the fluid used to inflate balloon 7, both said channels 5 and 8 being managed within the thickness of the actual catheter whose inner bore 2 intended for the flow of the conditioning liquid carries, in a central position, shielded cable 16 comprised of central conductor 22, inner sleeve 23, shield 24 and outer sleeve 27, as well as inner thermocouples 28, 29 and 30 power supply cables (not shown).
FIG. 2A is a schematic cross-section of antenna 1, taken along line A—A of FIG. 2. The following are shown therein, starting from the center: conductor 22, inner sleeve 23, metal shield 24, an intermediate sleeve 25, a metal cylinder 26, and outer sleeve 27, as well as thermocouple 30 power supply conductor.
FIG. 4 is a diagram showing the radiation intensity starting from the coil-shaped end 21 of antenna 1 towards shielded power supply cable 22, 16. As it is shown, intensity is a maximum when passing from radiating coil 21 to the stretch protected by metal cylinder 26, and it tends to nil at the position of shielded cable 16.
There is shown schematically in FIG. 5 the longitudinal section of the catheter provided with a radiating antenna according to this invention, once it has been introduced into the bladder, in an operative condition. The catheter, carrying the radiating antenna there-within, is introduced into bladder 32 through the urethra, in such a way that the rear end of protective metal cylinder 26 is located approximately at the bladder neck, in the transition area between prostata prostrate 33 and bladder 32, while simultaneously taking care that the catheter front end does not subject the bladder internal wall to any pressure. Once the catheter has been introduced into the bladder in such a way, one actuates the supply pump of conditioning liquid 2 preferably comprising a solution of a selective citotoxicity cytotoxicity substance, which is accordingly forced to circulate through the bladder coming out from opening 3 and going back through opening 4, or viceversa, along side channel 5 which carries the power supply cables of thermocouples 6, 6′, 6″ therewithin. The liquid forced circulation, provided by the variable flowrate supply pump, suitably combined with an outer balancing and degassing chamber, allows the volume of liquid within the bladder to be balanced at will, in such a way as to compensate the pathological or physiological urine production, while thoroughly ejecting the gases generated or unwillingly introduced in circulation, out of the bladder, in order to prevent irradiation non-uniformities which would otherwise be caused by coexistance of anisotropic media. Once bladder 32 has been completely filled with conditioning liquid 2, ballon 7 is inflated by introducing a fluid, which may be a gas but it is preferably a liquid, along side channel 8 and through the end opening 9 thereof; ballon 7 inflated as mentioned above, pushes then against outer thermocouples 6, 6′, 6″ power supply cables thereby moving said thermocouples into tangential engagement against bladder wall 32 in different positions, in order to detect the temperatures prevailing therein as caused by irradiation generated by antenna 1. The possibility of changing the location and the number of the outer thermocouples, enables the thermocouples to be positioned at will, on the bladder wall, or in any case place of the body organ to be treated, while being able to individually check the temperatures in the various locations. The inflated ballon 7 protects the bladder neck wall from an excess heat caused by the proximity of the radiating antenna, and in the meantime it prevents the catheter from being accidentally displaced or from coming out through the bladder neck.
The dimensions of antenna 1 are such that it may be freely positioned along the catheter while being obviously wholly contained within the human bladder to be treated, but in the meantime they must be suitable to generate a therapeutically active radiation, in order to reach the temperatures considered lethal for the cancer cells. Since the physical length of an antenna is related to the virtual electrical length thereof through an equation involving the impedance of said antenna, as well as the impedance deriving from the environment irradiated by the antenna, the antenna electrical length comes out to be inversely proportional to the irradiated medium conductivity. Accordingly, since the conductivity of an aqueous solution is for instance many times higher than the conductivity of air, when operating in an aqueous environment it is possible to use an antenna which is physically quite shorter than the length needed if it were necessary to operate in air.
The dipole according to this invention corresponds to a dipole of the quarter wave type and in the aqueous environment comprising the solution filled bladder, it makes it possible to operate at frequencies in the range of 900-1000 MHz; in particular, a frequency of 915 MHz has been chosen since very different frequencies would result in penetration, intensity, and other effects not always exactly predictable and controllable in the body tissues, since in general high frequencies have a low penetration power and therefore they do not provide the desired local heating, while lower frequencies, having a higher penetration power, may get deeper tissues involved and damaged.
On the other hand, radiations having different wavelengths might create a disturbance for radio and telephone communications, protected by constraints imposed by the legislations of the various countries.
In order to reduce to a minimum and possibly to nil the influence of the radiofrequency field of the thermocouples, as well as the various thermoelectric effects connatural with said thermocouples, the supply cable end stretches close to the thermocouples are wound into an helical shape whereby the temperature measured in the various sensing points is a reliable data, unaffected by said influences. The above structure construction prevents measuring errors due to conduction, it provides a reliable temperature indication, for instance exactly in the area of the dipole power supply position in the case of thermocouple 30, and it reduces in an extremely effective manner the thermocouple self-heating process due to radiofrequencies, also when there is an extremely high concentration of energy, whereby said structures are almost unaffected by the disturbances in the radio-frequency field.
Since the sizes, and in particular the cross-sections of the plural device components according to this invention must be extremely small, to suit the particular field of use desired for the device, the energy losses due for instance to self-heating of the antenna power supply cable are particularly high, for instance in the range of 20-40%. Since this undesirable self-heating, due to the Joule effect, might cause excessive heating of the urethral walls, and accordingly a discomfort for the patient subjected to treatment, or even damages to the tissues, the antenna cable, and the antenna itself are continuously cooled, while in operation, by using the conditioning liquid flow directed to the bladder and then withdrawn again therefrom, whereby a simultaneous control action is obtained, for controlling the temperature prevailing both in the liquid within the bladder and along the urethra. Temperature control is effected by variations of the conditioning liquid supply flow and of the cooling source temperature. In such a way it is possible both to increase the temperature and to withdraw heat.
In order to enable outer thermocouples 6, 6′, 6″ for detecting the bladder wall temperature to be safely deflected outwards when ballonon balloon 7 is inflated, the power supply cables thereof are reinforced along their whole length by inserting within the protecting sheath thereof a thin stainless steel wire providing them with the required rigidity and flexibility. The presence of said reinforcing wire provides as well he the thermocouple power supply cables with the mechanical strength necessary to bear the compressive and tensile stresses caused when the cables are inserted within side channel 5, and when thermocouples 6, 6′, 6″ are laid in the desired locations.
When the catheter, provided with all its components, is introduced into the urethral channel, all the way to the bladder, the ends of outer thermocouples 6, 6′, 6″ projecting upstream of balloon 7 through opening 4 are temporarily locked by inserting them, downstream of balloon 7, in one or more notches provided, as the case may be, in suitable positions according to the different body organ or the particular patient to be treated, close to the catheter end, as it is shown in FIG. 6. When balloon 7 is inflated it causes the thermocouple ends to come out from the notches and then to deflect outwards until the thermocouple tips come into engagement with the bladder wall. The particular outwards deflecting system of thermocouples 6, 6′, 6″ causes the ends of the respective power supply cables comprising the actual thermocouple, to tangentially engage the bladder wall, whereby no excessive concentrated pressures are generated. On the other hand, the tangential position taken by the thermocouple tips when contacting the bladder wall, makes it possible to measure the actual temperature of the wall position considered in that at the boundary between said wall and the liquid filling the bladder there is a thin liquid layer substantially stationary, which is not affected by the liquid circulation within the bladder, since it clings to the tissue because of a physical attraction, while the coil shape of the cable terminal stretches increases the thermal capacity of the thermocouple whose diameter, inclusive of the coils, is less than 0,7 mm whereby the thermocouple is completely submerged within the liquid stationary layer having a thickness of approximately 1 mm.
After the thermocouples have been deflected outwards within the bladder, it is still possible to modify their location by performing pushing and/or pulling actions on the reinforced power supply cables, as mentioned above, and possibly by rotating the catheter containing them. Control of the temperature detected on the bladder walls and/or within the circulating liquid mass, is obtained by changing the flowrate of said liquid from few cubic centimeters per minute to several tens of cubic centimeters per minute. The circulated fluid circulating system prevents permanence or formation and build-up of possible gas bubbles within the bladder or through the circuit, in that air or other gas bubbles having possibly formed or being already present, are entrained out by the continuous flow and exhausted to the outer environment in an appropriate position of the outer pumping circuit. In addition, the liquid circulation provided as above presents prevents the antenna and the environment thereof from overheating, therefore from causing undesirable reactions within the circulating liquid.
It is pointed out herein that all the antenna and thermocouple components contacted by the liquid circulating within the bladder are sealingly lined and insulated from the outer environment by a polytetrafluoroethylene layer whereby, after each usage and application they may be sterilized for subsequent further use.

Claims (12)

1. A radiating device for urethral hyperthermia including a catheter provided at its distal end with an inflatable balloon (7) and adapted to receive multiple injected liquid flows (2,5,8) passing therethrough, a radiofrequency radiating antenna (1) and multiple thermocouples (6,6′,6″), the radiating antenna being submerged within said liquid flow, characterized in that
said radiating antenna (1) is submerged within a liquid flow which proceeds through a central channel (2) surrounding said radiating antenna (1) towards the distal end of said catheter and passes from said catheter through a first opening (3) into the bladder to be treated, while flowing back into said catheter towards the proximal end thereof through a second separate opening (4) of a side channel (5) surrounding the power supply cables of said thermocouples (6,6′,6″),
the ends of said thermocouples (6,6′,6″) project out of said second opening (4), being thus deflected outwards into the bladder when said balloon (7) is inflated by injecting a fluid therein through a second side channel (8) and third opening (9), whereby the outwardly deflected ends of said thermocouples (6,6′,6″) come into tangential engagement with the bladder wall (32) irradiated by said antenna (1).
2. A radiating device for irradiating a cavity comprising:
a catheter;
an antenna, situated at a distal portion of the catheter, for irradiating the cavity;
a central channel adapted to provide a fluid to the cavity;
a side channel adapted to receive the fluid from the cavity;
at least one side branch, situated at a proximal portion of the catheter; and
at least one temperature sensing device, having an end, the end of the at least one temperature sensing device extending outward from the catheter after the catheter is inserted into the cavity;
wherein the end of the at least one temperature sensing device is adapted to detect a temperature of a wall of the cavity irradiated by the antenna.
3. The radiating device according to claim 2 wherein the at least one side branch provides an inlet for the fluid to enter the central channel.
4. The radiating device according to claim 2 wherein the at least one side branch provides an outlet for the fluid to exit from the side channel.
5. The radiating device according to claim 2 further comprising:
an inflatable balloon situated at the distal portion of the catheter;
a second side channel adapted to provide a fluid used to inflate the inflatable balloon; and
a one-way valve for introducing the fluid used to inflate the inflatable balloon to the second side channel.
6. The radiating device according to claim 5 wherein the fluid used to inflate the inflatable balloon is a liquid.
7. The radiating device according to claim 5 wherein the fluid used to inflate the inflatable balloon is a gas.
8. The radiating device according to claim 2 wherein the fluid comprises a conditioning liquid.
9. The radiating device according to claim 2 wherein the fluid comprises a solution of a selective cytotoxicity substance.
10. The radiating device according to claim 2 wherein the antenna comprises a linear dipole antenna.
11. The radiating device according to claim 10 wherein the linear dipole antenna comprises a coil-shaped segment.
12. The radiating device according to claim 2 further comprising a stainless steel wire coupled to the at least one temperature sensing device.
US09/923,279 1991-11-11 1994-05-03 Radiating device for hyperthermia Expired - Lifetime USRE40559E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/923,279 USRE40559E1 (en) 1991-11-11 1994-05-03 Radiating device for hyperthermia

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITMI912993A IT1251997B (en) 1991-11-11 1991-11-11 RADIANT DEVICE FOR HYPERTHERMIA
US08/232,190 US5431648A (en) 1991-11-11 1992-11-10 Radiating device for hyperthermia
PCT/IT1992/000142 WO1993009724A1 (en) 1991-11-11 1992-11-10 A radiating device for hyperthermia
US09/923,279 USRE40559E1 (en) 1991-11-11 1994-05-03 Radiating device for hyperthermia

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US08/232,190 Reissue US5431648A (en) 1991-11-11 1992-11-10 Radiating device for hyperthermia

Publications (1)

Publication Number Publication Date
USRE40559E1 true USRE40559E1 (en) 2008-10-28

Family

ID=11361066

Family Applications (4)

Application Number Title Priority Date Filing Date
US08/232,190 Ceased US5431648A (en) 1991-11-11 1992-11-10 Radiating device for hyperthermia
US09/923,279 Expired - Lifetime USRE40559E1 (en) 1991-11-11 1994-05-03 Radiating device for hyperthermia
US08/889,825 Expired - Lifetime USRE37315E1 (en) 1991-11-11 1997-07-08 Radiating device for hyperthermia
US09/923,279 Granted US20020077625A1 (en) 1991-11-11 2001-08-06 Radiating device for hyperthermia

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US08/232,190 Ceased US5431648A (en) 1991-11-11 1992-11-10 Radiating device for hyperthermia

Family Applications After (2)

Application Number Title Priority Date Filing Date
US08/889,825 Expired - Lifetime USRE37315E1 (en) 1991-11-11 1997-07-08 Radiating device for hyperthermia
US09/923,279 Granted US20020077625A1 (en) 1991-11-11 2001-08-06 Radiating device for hyperthermia

Country Status (13)

Country Link
US (4) US5431648A (en)
EP (1) EP0612228B1 (en)
JP (2) JP3635086B2 (en)
KR (1) KR100251010B1 (en)
AT (1) ATE150632T1 (en)
CA (1) CA2123137C (en)
DE (1) DE69218619T2 (en)
DK (1) DK0612228T3 (en)
ES (1) ES2100369T3 (en)
GR (1) GR3023121T3 (en)
HK (1) HK1006800A1 (en)
IT (1) IT1251997B (en)
WO (1) WO1993009724A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11974943B2 (en) 2022-04-29 2024-05-07 Arctx Medical, Inc. Apparatus and method for cooling and/or heating an organ

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5549559A (en) 1990-03-22 1996-08-27 Argomed Ltd. Thermal treatment apparatus
US5931774A (en) * 1991-06-14 1999-08-03 Proxima Therapeutics, Inc. Inflatable devices for tumor treatment
US5429582A (en) * 1991-06-14 1995-07-04 Williams; Jeffery A. Tumor treatment
US5618266A (en) * 1994-03-31 1997-04-08 Liprie; Samuel F. Catheter for maneuvering radioactive source wire to site of treatment
US5957917A (en) * 1995-01-20 1999-09-28 Miravant Systems, Inc. Transluminal hyperthermia catheter and method for use
US5735817A (en) * 1995-05-19 1998-04-07 Shantha; T. R. Apparatus for transsphenoidal stimulation of the pituitary gland and adjoining brain structures
US6302878B1 (en) * 1995-06-27 2001-10-16 S.L.T. Japan Co., Ltd. System for laser light irradiation to living body
IL120674A (en) * 1996-04-16 2001-03-19 Argomed Ltd Thermal treatment apparatus
US5891134A (en) * 1996-09-24 1999-04-06 Goble; Colin System and method for applying thermal energy to tissue
IT1290866B1 (en) * 1996-12-24 1998-12-14 Francesco Garbagnati PROBE-CATHETER FOR THE TREATMENT OF TUMORS OF PARENCHYMATOUS ORGANS WITH RADIOFREQUENCY INDUCED INTERSTIZIAL HYPERTHERMIA
US5913854A (en) * 1997-02-04 1999-06-22 Medtronic, Inc. Fluid cooled ablation catheter and method for making
US6139570A (en) * 1997-05-19 2000-10-31 Gynelab Products, Inc. Disposable bladder for intrauterine use
US5913813A (en) 1997-07-24 1999-06-22 Proxima Therapeutics, Inc. Double-wall balloon catheter for treatment of proliferative tissue
SE518946C2 (en) * 1997-07-28 2002-12-10 Prostalund Operations Ab Device for combined heat treatment of body tissue
US9023031B2 (en) * 1997-08-13 2015-05-05 Verathon Inc. Noninvasive devices, methods, and systems for modifying tissues
GB9809536D0 (en) * 1998-05-06 1998-07-01 Microsulis Plc Sensor positioning
US6022342A (en) * 1998-06-02 2000-02-08 Mukherjee; Dipankar Catheter introducer for antegrade and retrograde medical procedures
SE521014C2 (en) 1999-02-04 2003-09-23 Prostalund Operations Ab Apparatus for heat treatment of prostate
SE521275C2 (en) 1999-05-07 2003-10-14 Prostalund Operations Ab Device for heat treatment of body tissue
US6275738B1 (en) * 1999-08-19 2001-08-14 Kai Technologies, Inc. Microwave devices for medical hyperthermia, thermotherapy and diagnosis
US7837720B2 (en) * 2000-06-20 2010-11-23 Boston Scientific Corporation Apparatus for treatment of tissue adjacent a bodily conduit with a gene or drug-coated compression balloon
US6958075B2 (en) * 2001-09-18 2005-10-25 Celsion Corporation Device and method for treatment of tissue adjacent a bodily conduit by thermocompression
US7306591B2 (en) 2000-10-02 2007-12-11 Novasys Medical, Inc. Apparatus and methods for treating female urinary incontinence
AU4176302A (en) * 2000-10-23 2002-06-18 Ethicon Inc Apparatus and method for measurement and assessment of sling-tension for treatment of female urinary incontinence
JP4252316B2 (en) * 2001-05-10 2009-04-08 リタ メディカル システムズ インコーポレイテッド RF tissue excision apparatus and method
WO2003026719A2 (en) * 2001-09-27 2003-04-03 Galil Medical Ltd. Cryoplasty apparatus and method
WO2003026476A2 (en) * 2001-09-27 2003-04-03 Galil Medical Ltd. Apparatus and method for cryosurgical treatment of tumors of the breast
US6868290B2 (en) 2001-11-05 2005-03-15 Prostalund Operations Ab Thermotherapy catheter and method of prostate thermotherapy with improved guide and heat confinement
US6706040B2 (en) * 2001-11-23 2004-03-16 Medlennium Technologies, Inc. Invasive therapeutic probe
EP1489983A4 (en) * 2002-02-15 2010-11-10 Boston Scient Corp Method and apparatus treating tissue adjacent a bodily conduit with thermocompression and drugs
US6755849B1 (en) * 2002-03-28 2004-06-29 Board Of Regents, The University Of Texas System Method for delivering energy to tissue and apparatus
US6695760B1 (en) 2002-10-11 2004-02-24 Proxima Therapeutics Treatment of spinal metastases
US6749555B1 (en) 2003-02-13 2004-06-15 Proxima Therapeutics, Inc. System and method for the treatment of spinal metastases
US7018398B2 (en) * 2003-03-18 2006-03-28 Elmedical Ltd. System and method for treating urinary tract disorders
US7524274B2 (en) 2003-11-07 2009-04-28 Cytyc Corporation Tissue positioning systems and methods for use with radiation therapy
US7354391B2 (en) 2003-11-07 2008-04-08 Cytyc Corporation Implantable radiotherapy/brachytherapy radiation detecting apparatus and methods
US7494457B2 (en) 2003-11-07 2009-02-24 Cytyc Corporation Brachytherapy apparatus and method for treating a target tissue through an external surface of the tissue
US7524275B2 (en) 2003-11-14 2009-04-28 Cytyc Corporation Drug eluting brachytherapy methods and apparatus
JP2007512112A (en) 2003-11-20 2007-05-17 サイティック コーポレーション Brachytherapy method and applicator for treatment of metastatic lesions in the burden-bearing region
GB2416307A (en) * 2004-07-16 2006-01-25 Microsulis Ltd Microwave applicator head with null forming conductors allowing for sensor placement
US7753907B2 (en) * 2004-10-29 2010-07-13 Boston Scientific Scimed, Inc. Medical device systems and methods
US7662082B2 (en) 2004-11-05 2010-02-16 Theragenics Corporation Expandable brachytherapy device
US20060135953A1 (en) * 2004-12-22 2006-06-22 Wlodzimierz Kania Tissue ablation system including guidewire with sensing element
US20070055328A1 (en) * 2005-09-02 2007-03-08 Mayse Martin L Device and method for esophageal cooling
US7465268B2 (en) 2005-11-18 2008-12-16 Senorx, Inc. Methods for asymmetrical irradiation of a body cavity
US20070270627A1 (en) * 2005-12-16 2007-11-22 North American Scientific Brachytherapy apparatus for asymmetrical body cavities
US8137256B2 (en) * 2005-12-16 2012-03-20 Portola Medical, Inc. Brachytherapy apparatus
US8486127B2 (en) * 2006-05-24 2013-07-16 Kambiz Dowlatshahi High temperature thermal therapy of breast cancer
WO2008058089A2 (en) * 2006-11-03 2008-05-15 North American Scientific, Inc. Brachytherapy device having seed tubes with individually-settable tissue spacings
US8328711B2 (en) 2007-12-18 2012-12-11 Cytyc Corporation Selectable multi-lumen brachytherapy devices and methods
US9050069B2 (en) * 2008-05-16 2015-06-09 Medtronic Cryocath Lp Thermocouple-controlled catheter cooling system
US9248311B2 (en) 2009-02-11 2016-02-02 Hologic, Inc. System and method for modifying a flexibility of a brachythereapy catheter
US9579524B2 (en) 2009-02-11 2017-02-28 Hologic, Inc. Flexible multi-lumen brachytherapy device
US8382650B2 (en) 2009-05-11 2013-02-26 Cytyc Corporation Catheter marking for multi-lumen catheter identification
US10207126B2 (en) 2009-05-11 2019-02-19 Cytyc Corporation Lumen visualization and identification system for multi-lumen balloon catheter
US9089315B1 (en) * 2009-09-02 2015-07-28 The Regents Of The University Of California Methods and devices for adjunctive local hypothermia
US9352172B2 (en) 2010-09-30 2016-05-31 Hologic, Inc. Using a guide member to facilitate brachytherapy device swap
US10342992B2 (en) 2011-01-06 2019-07-09 Hologic, Inc. Orienting a brachytherapy applicator
BR112013026016A2 (en) 2011-04-12 2016-12-20 Thermedical Inc methods and devices for controlling ablation therapy
US10022176B2 (en) 2012-08-15 2018-07-17 Thermedical, Inc. Low profile fluid enhanced ablation therapy devices and methods
US9033972B2 (en) 2013-03-15 2015-05-19 Thermedical, Inc. Methods and devices for fluid enhanced microwave ablation therapy
US9610396B2 (en) 2013-03-15 2017-04-04 Thermedical, Inc. Systems and methods for visualizing fluid enhanced ablation therapy
US10940287B2 (en) 2014-12-19 2021-03-09 Memorial Sloan-Kettering Cancer Center Urinary catheter for facilitating control of bladder content volume and methods for use thereof
CN104434015A (en) * 2014-12-31 2015-03-25 杨幼林 Multifunctional outer cannula device for colonoscope
US9743984B1 (en) 2016-08-11 2017-08-29 Thermedical, Inc. Devices and methods for delivering fluid to tissue during ablation therapy
WO2018106688A2 (en) 2016-12-09 2018-06-14 St. Jude Medical, Cardiology Division, Inc. Pulmonary vein isolation balloon catheter
CN107224671B (en) * 2017-06-09 2023-07-18 深圳市美的连医疗电子股份有限公司 Cavity therapeutic apparatus
CA3087936A1 (en) * 2018-01-10 2019-07-18 Adagio Medical, Inc. Device for monitoring temperatures within and adjacent to body lumens
US11083871B2 (en) 2018-05-03 2021-08-10 Thermedical, Inc. Selectively deployable catheter ablation devices
US11918277B2 (en) 2018-07-16 2024-03-05 Thermedical, Inc. Inferred maximum temperature monitoring for irrigated ablation therapy

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154246A (en) * 1977-07-25 1979-05-15 Leveen Harry H Field intensification in radio frequency thermotherapy
GB2045620A (en) * 1979-03-23 1980-11-05 Rca Corp Coaxial applicator for hyperthermic treatment of the body
US4375220A (en) * 1980-05-09 1983-03-01 Matvias Fredrick M Microwave applicator with cooling mechanism for intracavitary treatment of cancer
JPS60119962A (en) 1983-12-01 1985-06-27 オリンパス光学工業株式会社 Electrode apparatus for body cavity
JPS6294152A (en) 1985-10-18 1987-04-30 オリンパス光学工業株式会社 Medical heat treatment apparatus
US4676258A (en) 1983-01-24 1987-06-30 Kureha Kagaku Kogyo Kabushiki Kaisha Device for hyperthermia
WO1989011311A1 (en) * 1988-05-18 1989-11-30 Kasevich Associates, Inc. Microwave balloon angioplasty
WO1990003152A1 (en) * 1988-09-24 1990-04-05 John Considine Electro-surgical apparatus for removing tumours from hollow organs of the body
US4924863A (en) * 1988-05-04 1990-05-15 Mmtc, Inc. Angioplastic method for removing plaque from a vas
EP0370890A1 (en) * 1988-11-21 1990-05-30 Technomed Medical Systems Apparatus for the surgical treatment of tissues by hyperthermia, preferably the prostate, equipped with heat protection means preferably comprising means forming radioreflecting screen
US4967765A (en) * 1988-07-28 1990-11-06 Bsd Medical Corporation Urethral inserted applicator for prostate hyperthermia
US5000734A (en) * 1988-02-01 1991-03-19 Georges Boussignac Probe intended to be introduced within a living body
US5007437A (en) * 1989-06-16 1991-04-16 Mmtc, Inc. Catheters for treating prostate disease
US5090958A (en) * 1988-11-23 1992-02-25 Harvinder Sahota Balloon catheters
US5103804A (en) * 1990-07-03 1992-04-14 Boston Scientific Corporation Expandable tip hemostatic probes and the like
US5168880A (en) * 1986-07-17 1992-12-08 Olympus Optical Co., Ltd. Apparatus for dielectric-heating living body by high-frequency current and apparatus therefor
FR2679456A1 (en) * 1991-07-26 1993-01-29 Technomed Int Sa Apparatus for in situ thermotherapy treatment of the mucous membrane of the uterine cavity
US5191883A (en) * 1988-10-28 1993-03-09 Prutech Research And Development Partnership Ii Device for heating tissue in a patient's body

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848636A1 (en) 1978-11-09 1980-05-22 Mark Cavity scavenging device for cancer hyperthermia treatment - has inlet and outlet channels coupled to external scavenging liq. circuit contg. pump, thermostat and heater
JPS5957650A (en) 1982-09-27 1984-04-03 呉羽化学工業株式会社 Probe for heating body cavity
US4776334A (en) 1985-03-22 1988-10-11 Stanford University Catheter for treatment of tumors
JPS62211056A (en) * 1986-03-12 1987-09-17 オリンパス光学工業株式会社 Tissue incision apparatus
IL78756A0 (en) 1986-05-12 1986-08-31 Biodan Medical Systems Ltd Catheter and probe
DE3620123A1 (en) 1986-06-14 1987-12-17 Strahlen Umweltforsch Gmbh MEASURING AND RADIATION DEVICE FOR CAVITIES
DE3785213T2 (en) 1987-12-21 1993-08-26 Reynaldo Calderon DEVICE FOR RETROPERFUSING THE BODY FOR THE PURPOSE OF HEALING A DISEASE OR IMMUNEWAY.
US5344435A (en) 1988-07-28 1994-09-06 Bsd Medical Corporation Urethral inserted applicator prostate hyperthermia
US5220927A (en) 1988-07-28 1993-06-22 Bsd Medical Corporation Urethral inserted applicator for prostate hyperthermia
US5249585A (en) 1988-07-28 1993-10-05 Bsd Medical Corporation Urethral inserted applicator for prostate hyperthermia
JPH02126863A (en) 1988-11-07 1990-05-15 Omron Tateisi Electron Co Electrode structure for high frequency thermotherapeutic device
US5129396A (en) * 1988-11-10 1992-07-14 Arye Rosen Microwave aided balloon angioplasty with lumen measurement
US4979948A (en) 1989-04-13 1990-12-25 Purdue Research Foundation Method and apparatus for thermally destroying a layer of an organ
US5114423A (en) 1989-05-15 1992-05-19 Advanced Cardiovascular Systems, Inc. Dilatation catheter assembly with heated balloon
US5084044A (en) * 1989-07-14 1992-01-28 Ciron Corporation Apparatus for endometrial ablation and method of using same
IL93842A (en) 1990-03-22 1995-10-31 Argomed Ltd Apparatus for localized thermal treatment of mammals
US5190540A (en) * 1990-06-08 1993-03-02 Cardiovascular & Interventional Research Consultants, Inc. Thermal balloon angioplasty
US5195965A (en) 1991-03-07 1993-03-23 Shantha Totada R Method and apparatus for localized treatment of human viral infections and cancers
US5301687A (en) 1991-06-06 1994-04-12 Trustees Of Dartmouth College Microwave applicator for transurethral hyperthermia
US5330518A (en) * 1992-03-06 1994-07-19 Urologix, Inc. Method for treating interstitial tissue associated with microwave thermal therapy
US5292320A (en) * 1992-07-06 1994-03-08 Ceramoptec, Inc. Radial medical laser delivery device
US5348554A (en) 1992-12-01 1994-09-20 Cardiac Pathways Corporation Catheter for RF ablation with cooled electrode
US5403311A (en) * 1993-03-29 1995-04-04 Boston Scientific Corporation Electro-coagulation and ablation and other electrotherapeutic treatments of body tissue
US5336222A (en) * 1993-03-29 1994-08-09 Boston Scientific Corporation Integrated catheter for diverse in situ tissue therapy
US5472441A (en) 1993-11-08 1995-12-05 Zomed International Device for treating cancer and non-malignant tumors and methods
US5599346A (en) 1993-11-08 1997-02-04 Zomed International, Inc. RF treatment system
US5505730A (en) * 1994-06-24 1996-04-09 Stuart D. Edwards Thin layer ablation apparatus

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154246A (en) * 1977-07-25 1979-05-15 Leveen Harry H Field intensification in radio frequency thermotherapy
GB2045620A (en) * 1979-03-23 1980-11-05 Rca Corp Coaxial applicator for hyperthermic treatment of the body
US4375220A (en) * 1980-05-09 1983-03-01 Matvias Fredrick M Microwave applicator with cooling mechanism for intracavitary treatment of cancer
US4676258A (en) 1983-01-24 1987-06-30 Kureha Kagaku Kogyo Kabushiki Kaisha Device for hyperthermia
JPS60119962A (en) 1983-12-01 1985-06-27 オリンパス光学工業株式会社 Electrode apparatus for body cavity
JPS6294152A (en) 1985-10-18 1987-04-30 オリンパス光学工業株式会社 Medical heat treatment apparatus
US5168880A (en) * 1986-07-17 1992-12-08 Olympus Optical Co., Ltd. Apparatus for dielectric-heating living body by high-frequency current and apparatus therefor
US5000734A (en) * 1988-02-01 1991-03-19 Georges Boussignac Probe intended to be introduced within a living body
US4924863A (en) * 1988-05-04 1990-05-15 Mmtc, Inc. Angioplastic method for removing plaque from a vas
WO1989011311A1 (en) * 1988-05-18 1989-11-30 Kasevich Associates, Inc. Microwave balloon angioplasty
US4967765A (en) * 1988-07-28 1990-11-06 Bsd Medical Corporation Urethral inserted applicator for prostate hyperthermia
WO1990003152A1 (en) * 1988-09-24 1990-04-05 John Considine Electro-surgical apparatus for removing tumours from hollow organs of the body
US5191883A (en) * 1988-10-28 1993-03-09 Prutech Research And Development Partnership Ii Device for heating tissue in a patient's body
EP0370890A1 (en) * 1988-11-21 1990-05-30 Technomed Medical Systems Apparatus for the surgical treatment of tissues by hyperthermia, preferably the prostate, equipped with heat protection means preferably comprising means forming radioreflecting screen
US5090958A (en) * 1988-11-23 1992-02-25 Harvinder Sahota Balloon catheters
US5007437A (en) * 1989-06-16 1991-04-16 Mmtc, Inc. Catheters for treating prostate disease
US5103804A (en) * 1990-07-03 1992-04-14 Boston Scientific Corporation Expandable tip hemostatic probes and the like
FR2679456A1 (en) * 1991-07-26 1993-01-29 Technomed Int Sa Apparatus for in situ thermotherapy treatment of the mucous membrane of the uterine cavity

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11974943B2 (en) 2022-04-29 2024-05-07 Arctx Medical, Inc. Apparatus and method for cooling and/or heating an organ
US11980570B2 (en) 2022-04-29 2024-05-14 Arctx Medical, Inc. Apparatus and method for cooling and/or heating an organ
US12023274B2 (en) 2022-04-29 2024-07-02 Arctx Medical, Inc. Apparatus and method for localized hypothermia of the pancreas
US12102558B2 (en) 2022-04-29 2024-10-01 Arctx Medical, Inc. Apparatus and method for cooling and/or heating an organ

Also Published As

Publication number Publication date
DE69218619T2 (en) 1997-07-03
CA2123137A1 (en) 1993-05-27
WO1993009724A1 (en) 1993-05-27
USRE37315E1 (en) 2001-08-07
US5431648A (en) 1995-07-11
GR3023121T3 (en) 1997-07-30
EP0612228B1 (en) 1997-03-26
ES2100369T3 (en) 1997-06-16
DK0612228T3 (en) 1997-05-05
JPH07504824A (en) 1995-06-01
KR100251010B1 (en) 2000-07-01
CA2123137C (en) 2005-01-11
JP2004255206A (en) 2004-09-16
ITMI912993A1 (en) 1993-05-11
US20020077625A1 (en) 2002-06-20
ATE150632T1 (en) 1997-04-15
IT1251997B (en) 1995-05-27
DE69218619D1 (en) 1997-04-30
ITMI912993A0 (en) 1991-11-11
JP3635086B2 (en) 2005-03-30
HK1006800A1 (en) 1999-03-19
EP0612228A1 (en) 1994-08-31

Similar Documents

Publication Publication Date Title
USRE40559E1 (en) Radiating device for hyperthermia
US9820814B2 (en) Devices and methods for cooling microwave antennas
US4967765A (en) Urethral inserted applicator for prostate hyperthermia
KR100190933B1 (en) Thermal therapeutic apparatus for the surgical treatment of tissues, in particular the prostate, by thermal effect
US5335669A (en) Rectal probe with temperature sensor
US5344435A (en) Urethral inserted applicator prostate hyperthermia
US20050228370A1 (en) Balloon catheter designs which incorporate an antenna cooperatively situated with respect to an external balloon surface for use in treating diseased tissue of a patient
JPS6329666A (en) Catheter and probe
JPS60108062A (en) High temperature treating apparatus of tumor
US6424869B1 (en) Dual mode transurethral microwave warming apparatus
WO1998027881A1 (en) Catheter for radiofrequency ablation of tumors
US6584361B1 (en) Method and device for heat treatment of body tissue
JPH0576610A (en) Micro wave probe for thermic therapy
AU2004260453B2 (en) Devices and methods for cooling microwave antennas
JPH0464368A (en) Electromagnetic radiation applicator device