JP2008301918A - Electric medical system, power receiving medical unit and power transmission unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric medical system capable of wirelessly supplying power to a power receiving medical unit without having an adverse effect on an MRI apparatus. <P>SOLUTION: Power is wirelessly supplied from the power transmission unit 140 to an infusion execution head 110 by a non-radiation type energy transfer. This constitution can dispense with the connection of the power transmission unit 140 to the infusion execution head 110 by a power line. Therefore, the power line generates no electromagnetic noise to, for example, be used near the MRI apparatus without any problem. The power is wirelessly supplied from the power transmission unit 140 to the infusion execution head 110 via a diaphragm to, for example, dispose the power transmission unit 140 in an MR operation room and dispose the infusion execution head 110 in an MR treatment room. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric medical system that functions by consuming electric power, and in particular, an electric medical system used for medical practice in the vicinity of a magnetic resonance imaging apparatus such as an MRI (Magnetic Resonance Imaging) apparatus, a power receiving medical unit thereof, and It relates to a power transmission unit.

  At present, as a fluoroscopic imaging apparatus for imaging a fluoroscopic image of a subject, a CT (Computed Tomography) scanner, an MRI apparatus, a PET (Positron Emission Tomography) apparatus, an ultrasonic diagnostic apparatus, a CT angio apparatus, an MRA (MR Angio) apparatus, etc. There is. When using the fluoroscopic imaging apparatus as described above, a chemical solution such as a contrast medium or physiological saline may be injected into a subject, and a chemical solution injection apparatus that automatically executes this injection has also been put into practical use.

  Such a chemical solution injection device has, for example, a syringe drive mechanism including a drive motor and a slider mechanism, and the chemical solution syringe is detachably mounted. The chemical syringe generally includes a cylinder member and a piston member, and the piston member is slidably inserted into the cylinder member.

  More specifically, the cylinder member is formed in a cylindrical shape, a conduit portion is formed at the center of the closed front end, and the rear end is opened. An annular cylinder flange is formed on the outer periphery of the rear end, and a piston member is slidably inserted into the inside from the rear end opening.

  When injecting the drug solution of the drug solution syringe as described above into the subject, the worker loads the drug solution syringe connected to the blood vessel of the subject with an injection needle and an extension tube in the drug solution injection device. In such a state, the chemical liquid injector drives the chemical liquid syringe with the syringe drive mechanism in response to a predetermined operation, so that the chemical liquid is pressed into the subject from the chemical liquid syringe.

  Note that the influence of electromagnetic noise cannot be ignored in a magnetic resonance imaging apparatus such as an MRI apparatus or MRA apparatus that captures a tomographic image by the magnetic resonance effect. For this reason, in general, a magnetic resonance imaging apparatus such as an MRI apparatus has a fluoroscopic imaging unit that captures a fluoroscopic image from a subject and an imaging control unit that is operated by a technician, which are formed separately. It is installed separately in the MR treatment room and the MR operation room.

  In that case, the chemical injection device connected to the subject is disposed in the MR treatment room together with the fluoroscopic imaging unit. The MR treatment room is formed as an electromagnetic dark room, and attenuates electromagnetic noise having a frequency that affects the magnetic field of the fluoroscopic imaging unit to a predetermined level.

  A magnetic resonance imaging apparatus such as an MRI apparatus captures a fluoroscopic image from a human body by magnetic resonance. The frequency of the magnetic resonance is, for example, about 20 to 80 megahertz. Therefore, the electromagnetic anechoic chamber used for the MR treatment room is formed to reduce electromagnetic waves having a frequency of several tens of megahertz to several hundreds of megahertz by about 60 to 100 decibels, for example.

  However, a chemical solution injection device for injecting a chemical solution to a subject must be necessarily placed in the MR treatment room. For this reason, the MRI compatible chemical solution injection device is required to generate as little electromagnetic noise as possible and not to be attracted to the maximum magnetic force of the MRI device.

  In view of this, the present applicant has invented and implemented a chemical injection device that satisfies the above-described conditions. The chemical solution injection apparatus has a main portion formed of a non-magnetic material and uses an ultrasonic motor as a drive source.

  For this reason, the above-mentioned chemical injection device does not generate electromagnetic noise that impedes the imaging operation of the MRI device as much as possible, and is not attracted to the strong magnetic force of the MRI device (for example, see Patent Documents 1 to 3).

  In addition, when a chemical solution is press-fitted into a blood vessel of a subject by the extension tube and the injection needle from the above-described chemical solution injection device, the injection needle may drop from the blood vessel and the chemical solution may leak. Therefore, the applicant has also invented a leak detection device for detecting such leaks.

The leak detection device is used by being attached to a position where an injection needle is punctured into a blood vessel of a subject, for example. Such a leak detection device can detect that the injection needle has dropped from the blood vessel of the subject and the chemical liquid has leaked, and can notify the operator of the leak (see, for example, Patent Documents 4 and 5). .
JP 2003-290348 A JP 2003-290349 A JP 2004-024476 A JP 2004-194802 A JP 2005-152577 A

  The chemical injection device of the above publication does not generate as much electromagnetic noise as possible to hinder the imaging operation of the MRI apparatus, and is not attracted to the strong magnetic force of the MRI apparatus. However, since the chemical injection device requires electric power to operate, electric power is supplied from a commercial power supply through a power supply line.

  On the other hand, the sensitivity of the magnetic resonance imaging apparatus has been improved in recent years, and further reduction of magnetic noise is required. For this reason, magnetic noise caused by a power supply line that supplies power to the chemical solution injector can no longer be ignored.

  The MR treatment room is formed in a structure that eliminates the cause of electromagnetic noise. For this reason, the commercial power source that causes the generation of electromagnetic noise may not be installed in the MR treatment room. In such a case, the chemical injection device used in the MR treatment room cannot use a commercial power source.

  In order to solve this problem, the present applicant has also implemented a product in which the power source of the chemical liquid injector is a secondary battery. However, of course, the secondary battery needs to be charged, and the work is complicated.

  Moreover, if the secondary battery is not sufficiently charged, the chemical injection device may stop during use. Furthermore, since the secondary battery is a consumable item, it needs to be replaced after being used a predetermined number of times, which contributes to environmental problems.

  Further, the leakage detection device of the above publication requires electric power for operation. For this reason, it is currently assumed that a primary battery or a secondary battery is built in the leakage detection device. However, in this case as well, if the battery voltage drops due to use, the leakage detection device stops, and the battery discarded as a consumable item contributes to environmental problems. Furthermore, since the leak detection device incorporating a battery is necessarily increased in size, the burden on the subject to which this leaks is affixed to the body surface is increasing.

  For example, there are devices that wirelessly supply power by electromagnetic induction. However, since electromagnetic induction can be used only for a very short distance, it is difficult to supply power to the chemical liquid injector and the leak detector.

  In particular, as described above, the chemical injection device used together with the MRI apparatus cannot be used because the electromagnetic induction magnetic field affects the magnetic field of the MRI apparatus. Also in the case of a leak detection device, it cannot be used because the electromagnetic induction magnetic field may affect surrounding medical devices.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide an electric medical system having a structure capable of wirelessly supplying power to a power receiving medical unit without adversely affecting an MRI apparatus or the like. And

  The electric medical system of the present invention is an electric medical system that functions by consuming electric power, and has an electric power transmission unit and an electric power receiving medical unit formed separately, and the electric power transmission unit does not radiate electric power. The power receiving medical unit wirelessly receives power by non-radiative energy transfer.

  Therefore, in the electric medical system of the present invention, power is wirelessly supplied from the power transmitting unit to the power receiving medical unit by non-radiative energy transfer. For this reason, it is not necessary to connect a power transmission unit and a receiving medical unit with a power supply line.

  The power receiving medical unit of the present invention is a power receiving medical unit of an electric medical system that functions by consuming electric power, and wirelessly receives electric power by non-radiative energy transfer.

  The power transmission unit of the present invention is a power transmission unit of an electric medical system that functions by consuming electric power, and wirelessly transmits the electric power by non-radiative energy transfer.

  Note that the various components of the present invention do not have to be individually independent, that a plurality of components are formed as one member, and one component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps a part of another component, and the like.

  In the electric medical system of the present invention, power is wirelessly supplied from the power transmitting unit to the power receiving medical unit by non-radiative energy transfer. For this reason, it is not necessary to connect a power transmission unit and a receiving medical unit with a power supply line. Therefore, no electromagnetic noise is generated from the power supply line, so that it can be used without any problem even in the vicinity of a magnetic resonance imaging apparatus such as an MRI apparatus. Furthermore, since power can be wirelessly supplied from the power transmission unit to the power receiving medical unit via the partition wall, for example, the power transmitting unit is disposed in the MR operation room and the power receiving medical unit is disposed in the MR treatment room. You can also.

  Embodiments of the present invention will be described below with reference to the drawings. The chemical injection device 100 of the present embodiment functions by consuming electric power. For this reason, as shown in FIG. 1, the chemical injection device 100 includes a power transmission unit 140 formed separately and an injection execution head 110 that is a power receiving medical unit. The power transmission unit 140 wirelessly transmits power by non-radiative energy transfer, and the injection execution head 110 wirelessly receives power by non-radiative energy transfer.

  More specifically, the chemical liquid injector 100 includes an injection control unit 101 and an injection execution head 110 that are formed separately, and a power transmission unit 140 is mounted on the injection control unit 101.

  The power transmission unit 140 includes a power transmission antenna 141 that resonates with an electromagnetic wave having a predetermined frequency, and an electromagnetic wave generation unit 142 that wirelessly transmits the power received from the external commercial power source PS to the power transmission antenna 141 as an electromagnetic wave with a predetermined frequency. Have.

  The injection execution head 110 consumes power converted from electromagnetic waves, a power receiving antenna 151 that resonates with electromagnetic waves of frequency, a power converter 152 that converts electromagnetic waves incident on the power receiving antenna 151 by resonance of frequencies, and power. And an electric function unit 150 functioning as

  As will be described in detail later, the chemical injection device 100 of the present embodiment is used together with an MRI apparatus 200 that is a magnetic resonance imaging apparatus. Therefore, the power transmitting antenna 141 and the power receiving antenna 151 do not affect the magnetic field of the MRI apparatus 200, and are not included in the frequency band of the electromagnetic wave that is reduced in the MR treatment room DR, which is an electromagnetic darkroom, of about 6.4 MHz. Resonates with electromagnetic waves of frequency.

  More specifically, as shown in FIG. 3, the injection control unit 101 includes an operation panel 103, a touch panel 104, a speaker unit 105, and the like disposed on the front surface of the main body housing 106.

  Further, as shown in FIG. 2, the injection control unit 101 is equipped with a computer unit 130. The computer unit 130 includes a one-chip microcomputer having hardware such as a CPU 131, a ROM 132, a RAM 133, and a communication I / F 134.

  A ROM 132, a RAM 133, a communication I / F (Interface) 134, an operation panel 103, a touch panel 104, a speaker unit 105, and the like are connected to the CPU 131, and a wireless communication unit 135 is connected to the communication I / F 134. ing.

  The injection control unit 101 also has a power cord 136 that is connected to the commercial power source PS and receives power. This power cord 136 is connected to the power transmission unit 140, the computer unit 130, the wireless communication unit 135, and the like. It is connected via, for example.

  On the other hand, as shown in FIG. 4, the injection execution head 110 is provided with a chemical syringe 400 that can be exchanged, and drives the chemical syringe 400 to inject a medical solution such as an MR contrast medium into a subject.

  The chemical syringe 400 includes a cylinder member 410 and a piston member 420, and the piston member 420 is slidably inserted into the cylinder member 410. The cylinder member 410 is filled with a chemical solution such as physiological saline or an MR contrast agent, and this chemical solution is injected into the subject.

  As shown in FIG. 3, the injection execution head 110 is attached to the upper end of the caster stand 111 with a movable arm 112, and the upper surface of the head main body 113 is a semi-cylindrical shape to which the chemical syringe 400 is detachably attached. The groove-shaped recess 114 is formed.

  A cylinder holding mechanism 115 that detachably holds the cylinder member 410 of the chemical solution syringe 400 is formed in the front part of the recess 114. A piston drive mechanism 116 that holds and slides the piston member 420 is disposed behind the recess 114.

  The piston drive mechanism 116 has an ultrasonic motor 118 that does not generate a magnetic field even when activated as a drive source, and the piston member 420 is slid and moved as a chemical injection mechanism by a screw mechanism (not shown) or the like.

  Further, as shown in FIG. 2, a load cell 119, a communication I / F 121, a head control circuit 122, and a wireless communication unit 123 are also mounted on the injection execution head 110. The wireless communication unit 123 is connected to the head control circuit 122 via the communication I / F 121, and the ultrasonic motor 118 and the load cell 119 are connected to the head control circuit 122.

  In the chemical injection device 100 of the present embodiment, each part is formed of a nonmagnetic material, and portions that cannot be formed of a nonmagnetic material are shielded. For example, the ultrasonic motor 118 is formed of a non-magnetic metal such as phosphor bronze alloy (Cu + Sn + P), titanium alloy (Ti-6Al-4V), magnesium alloy (Mg + Al + Zn), and the like. The head main body 113 and the like are made of a nonmagnetic resin.

  Note that the drug solution injection device 100 of the present embodiment injects a contrast medium or physiological saline as a drug solution into a subject whose fluoroscopic image is captured by the MRI apparatus 200 as described above. And the MRI apparatus 200 of this Embodiment has the fluoroscopic imaging unit 201 and the imaging control unit 210, as shown in FIG.

  The fluoroscopic imaging unit 201 is installed in the MR treatment room DR and captures a fluoroscopic image from the subject. The imaging control unit 210 is installed in the MR operation room CR and controls the operation of the fluoroscopic imaging unit 201.

  The signal line connecting the fluoroscopic imaging unit 201 and the imaging control unit 210 and the power line connected to the fluoroscopic imaging unit 201 are each shielded and embedded in the floor surface of the MR treatment room DR. (Not shown).

  In the configuration as described above, when using the liquid injector 100 of the present embodiment, as shown in FIG. 5, the injection execution head 110 is placed in the MR treatment room DR in which the fluoroscopic imaging unit 201 of the MRI apparatus 200 is installed. And the injection control unit 101 is arranged in the MR operation room CR in which the imaging control unit 210 is installed.

  As shown in FIG. 1, the power cord 136 of the injection control unit 101 is connected to the commercial power source PS. Then, the power transmission unit 140 wirelessly transmits the electric power received from the commercial power source PS as an electromagnetic wave of about 6.4 megahertz by the power transmission antenna 141.

  The MR treatment room DR, which is an electromagnetic anechoic chamber, is formed to reduce electromagnetic waves having a frequency of several tens of megahertz to several hundreds of megahertz that affect the magnetic field of the MRI apparatus 200 by about 60 to 100 decibels.

  In other words, the MR treatment room DR does not substantially reduce electromagnetic waves of about 6.4 MHz. Therefore, the electromagnetic wave of about 6.4 megahertz is wirelessly received by the power receiving antenna 151 of the injection execution head 110 arranged in the MR treatment room DR.

  At this time, the power transmitting antenna 141 and the power receiving antenna 151 resonate with an electromagnetic wave of about 6.4 megahertz. The electromagnetic wave resonating at this frequency can pass through the partition wall of the MR treatment room DR and the like, and does not affect the MRI apparatus 200 or the subject.

  By this non-radiative energy transfer, electric power is transmitted from the injection control unit 101 to the injection execution head 110. For this reason, the injection execution head 110 functions with electric power supplied wirelessly by non-radiative energy transfer as described above.

  Therefore, in the injection control unit 101, injection control data is generated by the computer unit 130 corresponding to the installed computer program and input data of the operation panel 103, and this is wirelessly transmitted to the injection execution head 110 by the wireless communication unit 135. To do.

  This wireless transmission is also performed at a frequency that does not affect the magnetic field of the MRI apparatus 200 and is not included in the frequency band of electromagnetic waves that is reduced in the MR treatment room DR that is an electromagnetic darkroom. Therefore, in the injection execution head 110 that wirelessly received the injection control data, the head control circuit 122 controls the operation of the ultrasonic motor 118 in accordance with the injection control data.

  At this time, the load cell 119 detects the pressure of the chemical liquid injected from the chemical liquid syringe 400 to the subject by the piston drive mechanism 116. The detection result is transmitted from the head control circuit 122 to the computer unit 130 of the injection control unit 101 by the wireless communication units 123 and 135.

  The computer unit 130 causes the touch panel 104 to display and output the received injection pressure. For this reason, the injection pressure of the chemical solution is presented to the operator by the touch panel 104 of the injection control unit 101.

  Furthermore, since the computer unit 130 feeds back the received injection pressure to the injection control data as necessary, injection of a chemical solution due to excessive pressure is prevented. Then, as described above, a fluoroscopic image is taken by the MRI apparatus 200 by a magnetic resonance action from a subject into which a chemical liquid such as a contrast medium is injected by the chemical liquid injection apparatus 100.

  In the chemical injection device 100 of the present embodiment, power is wirelessly supplied from the power transmission unit 140 formed separately as described above to the injection execution head 110 by non-radiative energy transfer.

  For this reason, it is not necessary to connect the power transmission unit 140 and the injection execution head 110 with a power supply line. Accordingly, no electromagnetic noise is generated from the power supply line, so that it can be used near the MRI apparatus 200 without any problem.

  Furthermore, power can be wirelessly supplied from the power transmission unit 140 to the injection execution head 110 through the partition wall by non-radiative energy transfer. For this reason, the power transmission unit 140 can be arranged in the MR operation room CR without the commercial power supply, and the injection execution head 110 can be arranged in the MR treatment room DR with the commercial power supply PS.

  In particular, the power transmitting antenna 141 and the power receiving antenna 151 resonate with electromagnetic waves having a frequency of about 6.4 MHz that do not affect the magnetic field of the MRI apparatus 200 and are not included in the frequency band of electromagnetic waves reduced in the MR treatment room DR. To do.

  For this reason, power can be wirelessly supplied without any problem from the power transmission unit 140 arranged in the MR operation room CR to the injection execution head 110 arranged in the MR treatment room DR. The magnetic field of the device 200 is not adversely affected.

  Moreover, in the chemical injection device 100 of the present embodiment, each part of the injection control unit 101 and the injection execution head 110 is formed of a nonmagnetic material, and a portion not formed of the nonmagnetic material is shielded. For this reason, even if the chemical injection device 100 of the present embodiment is used in the vicinity of the MRI apparatus 200, the magnetic field of the MRI apparatus 200 is not adversely affected.

  The present invention is not limited to the above embodiment, and various modifications are allowed without departing from the scope of the present invention. For example, in the above embodiment, power is wirelessly supplied from the power transmission unit 140 of the chemical liquid injector 100 to the injection execution head 110 by non-radiative energy transfer.

  However, the leakage detection system that is an electric medical system has a power transmission unit and a leakage detection unit that is a power reception medical unit, and power is wirelessly supplied from the power transmission unit to the leakage detection unit by non-radiative energy transfer. It is good (not shown).

  Such a leakage detection system is, for example, a leakage detection device that detects leakage of a chemical liquid injected by an injection needle into a blood vessel near the surface of a human body, and has a higher reflectance with respect to the chemical liquid than with respect to the internal tissue of the human body. A light emitting unit that emits light in a predetermined wavelength band including a specific wavelength to the human body at the position where the injection needle is inserted, a light detecting unit that detects light in the wavelength band reflected inside the human body, and detection A first measuring unit for measuring the intensity of the light having a specific wavelength, a second measuring unit for measuring the average intensity of the light having a detected wavelength band, and the intensity of the specific wavelength with respect to the measured average intensity. A ratio calculation unit that calculates the ratio of the leakage, a leakage determination unit that determines whether the calculated ratio is higher than a predetermined reference value, and a leakage warning that outputs a leakage warning when the occurrence of the leakage is determined And power It has a signal unit, and the power receiving antenna, a power conversion unit, (not shown).

  The leakage detection unit affixed to the human body is equipped with at least a light beam emission unit, a light beam detection unit, a power reception antenna, and a power conversion unit, and at least a leakage warning is provided to the warning notification unit that communicates wirelessly with the leakage detection unit. And the power transmission unit need only be mounted.

  Such a leak detection system utilizes the fact that when the chemical liquid injected into the blood vessel from the injection needle leaks, the intensity of the specific wavelength of the light reflected inside the human body rises relative to the average intensity of the wavelength band. Thus, a leakage warning can be notified and output.

  In addition, the above leak detection system and the chemical injection device 100 may be integrated. In that case, the power transmission unit 140 can be shared by the injection execution head 110 and the leakage detection unit.

  The injection execution head 110 is supplied with electric power from the power transmission unit 140 by non-radiative energy transfer, and from the second power transmission unit built in the injection execution head 110 to the leakage detection unit by non-radiative energy transfer. Power may be supplied (not shown).

  In a system in which the leak detection system and the chemical liquid injection device 100 are integrated as described above, the injection operation of the injection execution head 110 may be forcibly stopped in accordance with the detection result of the leak detection unit.

  Similarly, a hydraulic pressure detection system that is an electric medical system has a power transmission unit and a hydraulic pressure detection unit that is a power receiving medical unit, and power is transmitted from the power transmission unit to the hydraulic pressure detection unit by non-radiative energy transfer. It may be supplied wirelessly (not shown).

  In such a fluid pressure detection system, for example, a fluid pressure detection unit is attached to a drug solution tube that transmits a drug solution from a drug solution syringe to a blood vessel. For example, the liquid pressure detection unit detects the pressure of the chemical liquid from the pressure on the outer surface of the chemical liquid tube using a piezoelectric element.

  Accordingly, it is possible to detect and output an abnormal pressure of the injected chemical solution, or to forcibly stop the chemical injection device 100. Such a fluid pressure detection system can also be integrated with the chemical liquid injector 100 and the leakage detection system.

  In that case, the injection execution head 110, the leakage detection unit, and the hydraulic pressure detection unit can share the power transmission unit 140. Further, power may be supplied by non-radiative energy transfer from the second power transmission unit built in the injection execution head 110 to the leakage detection unit or the hydraulic pressure detection unit (not shown).

  Similarly, a bubble detection system that is an electric medical system has a power transmission unit and a bubble detection unit that is a power reception medical unit, and power is wirelessly supplied from the power transmission unit to the bubble detection unit by non-radiative energy transfer. (Not shown).

  In such a bubble detection system, for example, a bubble detection unit is attached to a chemical solution tube that transmits a chemical solution from a chemical syringe to a blood vessel. For example, the bubble detection unit optically detects bubbles mixed in the chemical solution supplied to the blood vessel of the subject through the extension tube.

  Therefore, it is possible to detect and output a bubble mixed in the injected chemical solution, or to forcibly stop the chemical injection device 100. Such a bubble detection system can also be integrated with the chemical injection device 100, the leakage detection system, and the hydraulic pressure detection system.

  In this case, the power transmission unit 140 can be shared by the injection execution head 110, the leakage detection unit, the fluid pressure detection unit, and the bubble detection unit. In addition, power may be supplied by non-radiative energy transfer from the second power transmission unit built in the injection execution head 110 to the leakage detection unit, hydraulic pressure detection unit, and bubble detection unit (not shown). .

  Furthermore, in the said form, it illustrated that the electric power transmission unit 140 was incorporated in the injection | pouring control unit 101 of the chemical | medical solution injection apparatus 100. FIG. However, the chemical injection device has a separate injection execution head, an injection control unit, and a power transmission unit (not shown), and non-radiative energy transfer from the power transmission unit to the injection control unit and the injection execution head. Electric power may be supplied.

  Further, a power transmission unit (not shown) is incorporated in the fluoroscopic imaging unit of the MRI apparatus, and power may be supplied from the power transmission unit to the injection execution head 110 by non-radiative energy transfer.

  Moreover, in the said form, MRI apparatus 200 which is a magnetic resonance imaging apparatus was used as a fluoroscopic imaging apparatus, and it illustrated that the chemical | medical solution injection apparatus 100 inject | pours a contrast agent for MR into a test subject as a chemical | medical solution. However, a CT scanner, a PET apparatus, an ultrasonic diagnostic apparatus, or the like may be used as the fluoroscopic imaging apparatus, and a contrast medium for the same may be injected into the subject (not shown).

  Needless to say, the above-described embodiment and a plurality of modifications can be combined within a range in which the contents do not conflict with each other. In the above-described embodiments and modifications, the structure of each part has been specifically described. However, the structure and the like can be variously changed within a range that satisfies the functions of the present invention.

It is a typical block diagram which shows structures, such as a power supply system of the chemical injection device of embodiment of this invention. It is a block diagram which shows the circuit structure of a chemical injection device. It is a perspective view which shows the external appearance of a chemical injection device. It is a perspective view which shows the external appearance of an injection execution head. It is a schematic diagram which shows the use condition of a chemical injection device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Chemical injection device 101 Injection control unit 103 Operation panel 104 Touch panel 105 Speaker unit 106 Main body housing 110 Injection execution head 111 Caster stand 112 Movable arm 113 Head main body 114 Recess 115 Cylinder holding mechanism 116 Piston drive mechanism 118 Ultrasonic motor 119 Load cell 122 Head Control circuit 123 Wireless communication unit 130 Computer unit 135 Wireless communication unit 136 Power cord 140 Power transmission unit 141 Power transmission antenna 142 Electromagnetic wave generation unit 150 Electric function unit 151 Power reception antenna 152 Power conversion unit 200 MRI apparatus 201 Fluoroscopic imaging unit 210 Imaging control Unit 400 Chemical syringe 410 Cylinder member 420 Piston member CR MR Sakushitsu DR MR treatment room PS commercial power supply

Claims (16)

An electric medical system that functions by consuming electric power,
A power transmission unit and a power receiving medical unit formed separately;
The power transmission unit wirelessly transmits the power by non-radiative energy transfer,
The power receiving medical unit is an electric medical system that wirelessly receives the power by the non-radiative energy transfer. The power transmission unit is
A power transmission antenna that resonates with electromagnetic waves of a predetermined frequency;
An electromagnetic wave generation unit that wirelessly transmits the power to the power transmission antenna as an electromagnetic wave of a predetermined frequency,
The power receiving medical unit is:
A power receiving antenna that resonates with electromagnetic waves of the frequency;
A power conversion unit that converts the electromagnetic wave incident on the power receiving antenna by resonance at the frequency into the power;
The electric medical system according to claim 1, further comprising: an electric function unit that functions by consuming the electric power converted from the electromagnetic wave.   The electric medical system according to claim 2, wherein the power transmission antenna and the power reception antenna resonate with the electromagnetic wave having the frequency that does not affect the magnetic field of the magnetic resonance imaging apparatus.   The electric medical treatment according to claim 2 or 3, wherein the power transmitting antenna and the power receiving antenna resonate with the electromagnetic wave having the frequency not included in the frequency band of the electromagnetic wave reduced in the electromagnetic darkroom in which the magnetic resonance imaging apparatus is installed. system.   The electric medical system according to any one of claims 2 to 4, wherein the power transmitting antenna and the power receiving antenna resonate with the electromagnetic wave having the frequency of about 6.4 megahertz.   The electric medical system according to any one of claims 1 to 5, wherein at least a main part of the power receiving medical unit is formed of a nonmagnetic material.   The electric medical system according to any one of claims 1 to 5, wherein a part of the power receiving medical unit is formed of a non-magnetic material and the other part formed of a magnetic material is magnetically shielded.   The electric medical system according to any one of claims 1 to 7, wherein the power receiving medical unit includes a chemical solution injection mechanism that presses a chemical solution into a blood vessel of a subject.   The electric power medical system according to any one of claims 1 to 8, wherein the power receiving medical unit includes a leakage detection unit that detects leakage of a liquid medicine injected into a blood vessel near a body surface of a subject by an injection needle.   The electric medical system according to any one of claims 1 to 9, wherein the power receiving medical unit includes a hydraulic pressure detection unit that detects a pressure of a chemical liquid to be pressed into a blood vessel of a subject.   The electric medical system according to any one of claims 1 to 10, wherein the power receiving medical unit includes a bubble detection unit that detects bubbles mixed in a chemical solution supplied by an extension tube to a blood vessel of a subject.   The electric medical system according to any one of claims 2 to 5, wherein the electromagnetic wave generation unit receives the electric power from an external commercial power source. A power receiving medical unit of an electric medical system that functions by consuming electric power,
A power receiving medical unit that wirelessly receives the power by non-radiative energy transfer. A power receiving antenna that resonates with electromagnetic waves of a predetermined frequency;
A power conversion unit that converts the electromagnetic wave incident on the power receiving antenna by resonance at the frequency into the power;
An electric function unit that functions by consuming the electric power converted from the electromagnetic wave;
The power receiving medical unit according to claim 13. An electric power transmission unit of an electric medical system that functions by consuming electric power,
A power transmission unit that wirelessly transmits the power by non-radiative energy transfer. A power transmission antenna that resonates with electromagnetic waves of a predetermined frequency;
The power transmission unit according to claim 15, further comprising: an electromagnetic wave generation unit that wirelessly transmits the power as an electromagnetic wave having a predetermined frequency to the power transmission antenna.

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