JP2019129901A - Suction tool for surgery - Google Patents

Abstract

To provide a suction tool for surgery capable of sucking and removing a clot in which viscosity is increased, in surgery in a body cavity, especially, Needle scopic surgery, preventing damage to a tissue, and preventing a part of a damaged tissue from being included in a suction pipe.SOLUTION: There is provided a suction tool for surgery 1 comprising: a tip part 2a inserted into a body cavity of a patient and serves as a suction hole of a suction object; a suction pipe 2 which is formed of a pipe whose outer diameter is 3 mm or less and connects an operation part 4 operated by an operator and is present outside of the patient; a rotor 3 being arranged over almost whole length of the suction pipe, being stored in the suction pipe, being formed of a wire folded into a U-shape which is reversed at a tip part of the suction pipe, or a plate material; and a small motor 4a for rotating the rotor 3 at high speed. In addition, the tip part 3a folded into the U-shape of the rotor 3 is slightly retreated to the operation part 4 side relative to the tip part 2a of the suction pipe.SELECTED DRAWING: Figure 2

Description

  The present invention is a suction device used in surgery, in particular, endoscopic surgery, in particular, endoscopic surgery called Needlescopic surgery, which is capable of suctioning clots as well as washing water and the like. The present invention relates to a suction device for use.

  Since 1990, many surgical procedures have been performed using endoscopes. In surgery using this endoscope, so-called endoscopic surgery, conventionally, treatment instruments such as a scalpel, forceps, and coagulation electrodes (hereinafter referred to as “surgical forceps etc.”) differ from endoscopes. It was inserted through the skin incision hole, and at least two skin incision holes were necessary for the insertion, and depending on the type of treatment, it was necessary to provide three or more skin incision holes. This endoscopic operation is hereinafter referred to as “conventional endoscopic operation”.

  When performing conventional endoscopic surgery, it is necessary to insert surgical forceps or the like or an endoscope into a body cavity through a local unit provided on the chest wall or abdominal wall. The local unit is a tube made of stainless steel or synthetic resin, and its inner diameter is about 15 mm. Therefore, the outer diameter of a surgical forceps or the like that needs to pass smoothly through the lumen of the local unit or an endoscope is usually about 10 mm.

  Recently, in order to reduce the burden on patients undergoing surgery and to facilitate early recovery after surgery, Needlescopic aims to reduce the number and size of skin incisions used for endoscopic surgery. Endoscopic surgery using a thin surgical forceps including an endoscope having an outer diameter of 3 mm or less, which is called “surgery” (hereinafter referred to as “needlesscopic surgery” to be described separately from “conventional endoscopic surgery”) .) Is popular.

  Now, what becomes a problem in these endoscopic operations is the operation of taking the clot out of the body. Bleeding diseases and injuries, or bleeding that occurs in surgery, are liquid immediately after bleeding, and therefore can be taken out of the body by suction after inserting the suction tube.

  However, blood begins to clot within minutes after bleeding and gradually increases in viscosity. After about 30 minutes from bleeding, a clot is formed, and the viscosity increases with time. After about 1 hour from bleeding, it may become harder than tofu. The clot with increased viscosity as time elapses is composed of a suction tube having an outer diameter of about 10 mm, which has been used in conventional endoscopic surgery, and a vacuum pump or the like that is usually used for suction in an operating room. With the combination of suction devices, the force is insufficient and suction / removal is not possible.

  When this happened, there was no other way than scraping the clot through a large wound. To that end, it is necessary to enlarge the wound in the conventional laparotomy, and in the endoscopic surgery, it is necessary to create a new wound for scraping the clot. Surgery that is inappropriate to adopt this method, such as ectopic pregnancy in gynecological areas where a large amount of blood clots can occur in the abdominal cavity, is difficult to remove because of the clot removal that would occur. Therefore, it is regarded as a disease not suitable for endoscopic surgery.

  In Needlescopic surgery, the difficulty of taking this clot out of the body is more serious than in conventional endoscopic surgery. Even if a tube with an outer diameter of 3 mm is inserted into the body cavity as a suction tube and suction is performed with a suction device normally used for suction work in the operating room, sufficient force is required to suck the clot and move it outside the body cavity. Absent. Unfortunately, the clot that has entered the suction tube adheres to the inner wall of the suction tube due to its viscosity, narrows its lumen, and further reduces the small inner cross-sectional area of the suction tube to suck and remove the clot. Make work impossible.

  Until now, if bleeding occurs, it is usually aspirated while reducing the blood concentration by supplying saline, or by supplying an anticoagulant used to treat vascular embolism, etc., while reducing the viscosity of the clot. Attempts have been made, but it has little effect on suctioning blood clots once they have increased in viscosity.

  In order to solve the problem of how to suck and remove this clot with increased viscosity, brush-like hair is attached to the tip of the suction tube, and the clumped blood is rubbed with the brush to loosen it. Attempts have been made to blow away blood clots clogging the suction port of the suction tube and its lumen by sending physiological saline back to the suction tube, but none of them is a sufficient solution. Prior to the filing of this application, a search was made using a patent information platform for an instrument, apparatus, or method for solving this problem, but no prior patent document was found.

  In addition, the blood clot with increased viscosity cannot be seen even if an endoscope is inserted, so there is a risk of damaging the tissue if it is rubbed with the above-mentioned brush or stirred with a sharp object. . There is a risk of damaging the tissue itself, and a part of the damaged tissue may be caught in the suction tube, which may further make suction difficult.

  On the other hand, prior art exists for instruments and devices that suction and remove fluid from the body cavity by suction. For example, in endoscopic surgery, washing is performed at a high frequency in order to maintain an easy-to-see surgical field with an endoscope. This cleaning is performed by supplying a cleaning liquid into the body cavity and sucking and discharging a liquid fluid in which a small amount of blood or tissue is mixed with the cleaning liquid from the body cavity. Various surgical cleaning instruments using this cleaning liquid have been developed.

  Patent Document 1 and Patent Document 2 are examples of the invention of such a surgical cleaning instrument. In particular, the invention of Patent Document 2 relates to a water supply / suction washing tube that is considered for endoscopic surgery. The water supply / suction washing tube that performs water supply and suction is provided with a large number of small through holes. Covering with a tube, providing a coaxial holding part that has the function of a valve in its annular part, and changing the relative position in the axial direction of the water supply / suction washing tube and the outer cylinder, thereby cleaning a part of the surgical field and In addition, it is possible to perform intraperitoneal irrigation in which the inside of the abdominal cavity is widely washed, and it is possible to suck a washing solution and the like without aspirating the abdominal gas, and to prevent the intraperitoneal tissue from being involved in the suction.

  All of these surgical cleaning instruments have a suction function at the same time as the water supply function of the cleaning water, but the suction function mixes the cleaning liquid supplied into the body cavity and a small amount of blood or tissue in the cleaning water. It is intended for aspirating and removing the fluid and is not intended for aspirating / removing clots with high viscosity.

  For example, in the invention of Patent Document 2, according to the embodiment, in order to prevent the tissue in the abdominal cavity from being caught in the water supply / suction washing tube when aspirating, an outer cylinder having an outer diameter of 3 mm to 4 mm has a plurality of diameters An approximately 1 mm round hole is provided, which attempts to block intraperitoneal tissue that is about to flow with the lavage fluid. If an attempt is made to suck a clot having increased viscosity as described above using this configuration, the round hole will be clogged immediately and the purpose cannot be achieved. If the suction operation is continued, the water supply / suction washing tube itself becomes clogged, and the suction function is lost.

Japanese Patent Laid-Open No. 10-193 JP 2016-49364 A

None

  Therefore, the problem to be solved by the present invention is that not only a washing liquid or a fluid in which a small amount of blood or tissue is mixed in the washing water but also a clot with increased viscosity can be sucked and removed, and an object to be sucked To provide a surgical suction instrument that does not injure any other tissue, and in which a portion of the damaged tissue is not entangled in the suction tube.

The present invention includes a distal end portion (hereinafter referred to as “aspiration tube distal end portion”) that is inserted into a body cavity of a patient and serves as a suction port for an aspiration target, and an operation portion that is outside the patient's body and is operated by an operator. A suction tube connecting the
A rotating body made of a wire material or a plate material, which is housed inside the suction tube, arranged over substantially the entire length of the suction tube, and bent into a U-shape that is reversed at the tip of the suction tube;
A surgical suction instrument including a small motor that rotates the rotating body at high speed.

  The suction tube is provided over almost the entire length of the suction tube, and is rotated at a high speed by a small motor, which is a U-shaped wire or plate that is reversed at the tip of the suction tube, and rotated by a small motor. By bringing the tip of the tube closer to the clot, and possibly allowing the tip to enter the clot, suction is performed with a suction device usually used for suction work in the operating room, so that washing liquid, blood, clot Even a clot with increased viscosity, which is the most difficult to be aspirated, can be subdivided at the tip of the U-shaped rotating body. Can be removed.

  At the same time, a rotating body made of a wire or plate bent in a U-shape rotates while being pressed against the inner wall of the suction tube by centrifugal force due to high-speed rotation, so that the clot attached to the inner wall of the suction tube is always scraped off. It works so that the lumen does not block over the entire length of the suction tube.

  Furthermore, the present invention is the above-described surgical suction instrument, wherein the suction tube has an outer diameter of 3 mm or less.

  The above-mentioned clot can be subdivided at the tip of a U-shaped rotating body that rotates at high speed, and can be easily sucked out of the body cavity and removed outside the body even if a suction tube having an outer diameter of 3 mm or less is used. Can demonstrate. By setting the outer diameter of the suction tube to 3 mm or less, it can be used in the Needlescopic surgery.

  Further, the present invention relates to these surgical suction instruments, and the distal end portion of the rotating body bent in a U shape (hereinafter referred to as “rotating body distal end portion”) is slightly smaller than the distal end portion of the suction tube. And a surgical suction instrument that is retracted to the operation portion side.

  The tip of the suction tube may come into contact with tissues such as organs (hereinafter referred to as “organs”) other than the suction target. In that case, since the lumen of the suction tube is at a lower pressure than the operative field during the suction operation, the contacted organ or the like is slightly attracted to the lumen and the tip of the U-shaped rotating body that rotates at high speed It may be damaged by touching. This contact can be avoided by placing the tip of the rotating body slightly behind the tip of the suction tube.

  Incidentally, when taking a suction tube having an outer diameter of 3 mm, which will be used in Needlescopic surgery, as an example, the inner diameter becomes smaller than that and becomes about 2.8 mm. When a suction pressure of 1/20 of the atmospheric pressure is applied to the suction port of this inner diameter by a suction device usually used for suction work in an operating room, an organ or the like tends to be drawn into the suction port. Etc. have rigidity, the amount that is sucked into the suction tube is 0.1 mm or less. Therefore, if the rotator tip is retracted about 0.2 mm from the tip of the suction tube, an organ or the like does not directly contact the rotator tip, and unnecessary damage does not occur. As a result, a part of a damaged organ or the like is not caught in the suction tube.

  The clot does not have rigidity even when the viscosity increases, so that the tip of the suction tube can easily enter the clot. Therefore, even if the distal end of the rotating body is positioned slightly behind the distal end of the suction tube, the ability to subdivide the clot at the distal end of the rotating body is hardly diminished.

  The surgical suction instrument of the present invention uses a suction device usually used for suction work in an operating room, and not only a cleaning liquid or a fluid in which a small amount of blood or tissue is mixed in the cleaning water but also a blood clot having increased viscosity. Aspiration and removal of lumps is possible. Furthermore, by placing the tip of the rotating body at a position slightly retracted from the tip of the suction tube, the organ or the like does not directly contact the tip of the rotating body, and unnecessary damage does not occur. A part of is not caught in the suction tube. This effect is sufficiently exerted even in a suction tube having an outer diameter of 3 mm or less that can be used in Needlescopic surgery.

  By using the surgical suction instrument of the present invention, there is no need to provide a large skin incision hole for scraping the blood clot, and it is not necessary to insert a thick suction tube with a separate skin incision hole for suction. In addition to shortening the operation time, the traumatic part of the operation is reduced and the operation is made less invasive. Furthermore, it contributes to reducing the risk of postoperative wound infection, improving postoperative pain, shortening the time required for wound healing, etc., and can greatly reduce the burden on the patient. In addition, in Needlescopic surgery, the skin incision length for insertion of the suction device can be suppressed to 3 mm or less, and further, the invasion to the patient is suppressed and the wound is healed without leaving any traces. Contributes to sex.

1 is an overall view of Example 1 of a surgical suction instrument according to the present invention. It is the side view (a) of the suction tube which comprises the suction tool for surgery of Example 1, and the side view of the side view (b) of a rotary body and a small motor. It is an expanded sectional view of the A section of FIG. 1 which shows the state at the time of stationary of the rotary body of the surgical suction instrument of Example 1. FIG. It is an expanded sectional view of the A section which similarly shows the state at the time of rotation of a rotary body. It is explanatory drawing showing the state which inserted the surgical suction instrument of Example 1 in the chest cavity. It is explanatory drawing which shows the state before the front-end | tip part of the surgical suction instrument of Example 1 inserted in the chest cavity reaches a clot. It is explanatory drawing which shows the state which the front-end | tip part reached the clot. It is explanatory drawing which shows the state which the front-end | tip part approached the organ etc. in the back of a clot. It is an enlarged view of the front-end | tip part of the rotary body of Example 2 of the surgical suction instrument of this invention. It is sectional drawing of the front-end | tip part of Example 3 of the surgical suction instrument of this invention. It is explanatory drawing which shows the state which the front-end | tip part contacted the organ etc.

  An embodiment for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to such an embodiment, and it goes without saying that various modifications may be made to the specific structure within the scope of the present invention. Moreover, all of the following examples use a suction tube having an outer diameter used for Needlescopy surgery, which is the most difficult to remove a clot. Even in the case of a suction tube having a larger outer diameter that will be used in open surgery or conventional endoscopic surgery, the present invention can be easily developed based on these embodiments.

  FIG. 1 is an overall view of Embodiment 1 of the surgical suction instrument of the present invention, and FIG. 2 is a side view (a) of a suction tube constituting the same, and a side view (b) of a rotating body and a small motor.

  A surgical suction instrument 1 according to the present embodiment includes a suction tube 2 and a wire rod that is accommodated within the suction tube 2 and disposed over substantially the entire length of the suction tube, and is bent into a U shape that is reversed at the distal end portion 2a of the suction tube. The rotating body 3 consisting of is used as a main component.

  In this embodiment, the suction tube 2 is a stainless tube having an outer diameter of 3 mm that can be used in Needlescopic surgery, and the inner diameter is only 2.8 mm. On the other hand, the wire which comprises the rotary body 3 is a piano wire with an outer diameter of 0.6 mm.

  In order to increase the effective area in the suction tube that contributes to the suction, the outer diameter of the wire constituting the rotating body 3 arranged in the suction tube 3 is preferably thin, but rotational force was given by the small motor 4a. In some cases, too thin wires will twist and become entangled. As a result of many trials, 0.6 mm was adopted as the minimum outer diameter that is not twisted or entangled.

  In laparotomy and conventional endoscopic surgery, a suction tube with a larger outer diameter can be used, and the effective area in the suction tube can be increased, so that the outer diameter is 0.6 mm as a wire constituting the rotating body. Larger ones can also be used.

  The suction tube 2 and the rotating body 3 are integrated by a female screw of the connecting portion 4b provided in the suction tube and a male screw of the small motor connecting portion 4c provided in the small motor 4a coupled to the rotating body. The connecting tube 4d provided in the suction tube connecting portion 4b is connected to the suction device through a device that separates and discharges the fluid that has been sucked in and the subdivided clot. Note that these devices are usually used for suction work in an operating room and are not shown here. On the other hand, the small motor 4a only needs to be rotated at a high speed of about 300 rpm to 500 rpm. What is used for a commercially available hand mixer etc. can be utilized, and electric power is supplied from a battery or an external power supply.

  The surgeon grasps the operation unit 4 including the small motor 4a and the connecting portions 4b and 4c, and guides the surgical suction instrument distal end 1a to the surgical field where suction is desired. When performing suction, the operator operates a valve that generates suction pressure in the suction tube 3 and activates the surgical suction instrument 1 by turning on a switch that rotates the small motor 4a to perform suction operation. To start.

  FIG. 3 is an enlarged cross-sectional view of the portion A of FIG. 1, that is, the vicinity of the suction tube distal end portion 1 a, and shows a state where the rotating body 3 is stationary. FIG. 4 is an enlarged cross-sectional view of the same A portion rotating body 3 during rotation.

  The rotating body 3 bent into a U-shape is arranged over almost the entire length of the suction tube 2, and its tip 3a is in the vicinity of the suction tube tip 2a. As shown in FIG. 3, the outer width W of the two piano wires that are bent in a U-shape and extend in parallel is sufficiently smaller than the inner diameter D of the suction tube 2, so that the surgical suction instrument When assembling 1, the rotating body 3 can be easily inserted into the suction tube 2.

  On the other hand, when the surgeon activates the surgical suction instrument 1 and the small motor 4a rotates the rotating body 3 at a high speed, the rotating body distal end portion 3a removes a clot with increased viscosity and a solid matter that obstructs suction. Although it is pulverized and the effective inner cross-sectional area of the suction tube 2 is small, suction and discharge can be performed without hindrance from a suction device normally used for suction work in an operating room. Also, as shown in FIG. 4, the piano wire constituting the rotating body rotates while being pressed against the inner wall 2b of the suction tube 2 by centrifugal force due to high-speed rotation, so that the clot adhered to the suction tube inner wall 2b is always rubbed. It works so that the lumen does not block over the entire length of the suction tube, facilitating suction and discharge.

  Next, a suction operation using the surgical suction instrument 1 will be described in order. FIG. 5 is an overall explanatory view showing a state in which the surgical suction instrument 1 is inserted into the chest cavity. 6 to 8 focus on the suction tube tip 2a of the surgical suction instrument 1, FIG. 6 shows a state before the suction tube tip 2a reaches the clot, and FIG. 7 shows a state where the clot has been reached. Moreover, FIG. 8 is explanatory drawing which each shows the state which approached the organ etc. in the back of the clot.

  FIG. 5 shows the surgical suction instrument 1 inserted into the chest cavity 6. In this embodiment, a fluid in which a small amount of blood or tissue is mixed with the cleaning fluid supplied into the chest cavity during endoscopic surgery between the chest wall 7 and the lung 8 constituting the chest cavity 6 (hereinafter referred to as “cleaning fluid or the like”). 9, there is a clot 10 whose viscosity is increasing, and it is desired that these are rapidly sucked and discharged out of the body.

  A position where the surgical suction instrument tip 1a can easily reach the washing water 9 or the blood clot 10 to be aspirated / discharged in advance, for example, a skin incision hole having a size of 3 mm in the shape of the axilla center line under the armpit The surgical suction instrument 1 is inserted into the body from there.

  As shown in FIG. 6, the inserted distal end portion 1a of the surgical suction instrument is first inserted into the cleaning liquid 9 and the like, and the cleaning liquid is operated by a suction device (not shown) connected to the contact person 4d. Are sucked in the direction of arrow E, sent in the direction of arrow F, and discharged. Since the rotator 3 continues to rotate at a high speed, even if there is a solid matter having a size that is difficult to pass through the thin suction tube 2 in the cleaning liquid 9 or the like, the rotator 3 is crushed by the rotator tip 3a and smoothly Can be discharged. Further, since the rotating body 3 is pressed by the high speed rotation and moves so as to rub the suction pipe inner wall 2b, no deposits are deposited on the suction pipe inner wall 2b.

  FIG. 7 shows a state where the surgical suction instrument distal end portion 1 a is further inserted into the clot 10. The suction device is activated, and the rotating body 3 continues to rotate at a high speed by the action of the small motor. Although the viscosity has increased, the clot blood 10 does not have rigidity, so that the suction tube tip 2a can easily enter into it. As it enters, the rotating body tip 3a catches the clot that has entered the tip of the suction tube and pulverizes it finely by the force of its high-speed rotation. The crushed clot 10a rides on the flow of the cleaning liquid 9 that flows through the slight gap 9a between the clot and the suction tube, is sent in the direction of arrow F, and is discharged. Also in this case, since the rotating body 3 is pressed by high speed rotation and moves so as to rub the suction tube inner wall 2b, clots sent by being crushed are accumulated on the suction tube inner wall 2b, and the effective inside of the suction tube is accumulated. It does not narrow the cross-sectional area.

  FIG. 8 shows a state in which the surgical suction instrument distal end portion 1a is further inserted and approaches the organ 11 or the like. The suction tube tip 2a is capped by the organ 11 or the like, and the flow in the suction tube 2 stops even if the suction device is working. Even if the suction pipe tip 2a is not completely covered and a very small amount of the cleaning liquid 9 leaks and mixes, the flow in the suction pipe 2 becomes slow and almost stagnant. When the operator observes with an endoscope inserted through another skin incision hole, and notices that the amount of liquid discharged is drastically reduced, the suction tube tip 2a comes into contact with an organ or the like, It can be recognized that there is no need to push the surgical suction instrument 1 further. Therefore, the organ 11 or the like is not injured by mistake.

  In this case, since there is no clot entering the suction tube 2 from the suction tube tip 2a, the rotation end tip 3a continues to rotate without crushing the clot.

  Next, Example 2 of the surgical suction instrument of the present invention will be described. Since the surgical suction instrument of this embodiment is the same as the surgical suction instrument 1 of the first embodiment except that the shape of the rotating body is different, only the shape of the rotating body will be described. FIG. 9 is an enlarged view of the distal end portion of the rotating body 23 of the surgical suction instrument according to the second embodiment of the present invention.

  In Example 1, a stainless steel tube having an outer diameter of 3 mm and an inner diameter of 2.8 mm was used as the suction tube 2, and the wire constituting the rotating body 3 was a piano wire having an outer diameter of 0.6 mm. In the surgical suction instrument according to the second embodiment, suction pipes having the same dimensions are used, and the rotating body 23 is formed by bending an elongated plate material having a width d of 0.8 mm and a thickness t of 0.4 mm into a U shape. Consists of. As in the case of the first embodiment, the rotator 23 composed of this plate material is disposed over almost the entire length of the suction pipe and is rotated at a high speed by a small motor.

  The action and effect of the rotating body 23 made of a plate material is the same as that of the rotating body 3 of the first embodiment. However, the rotating body 23 has a surface perpendicular to the moving direction by rotation and is thin, so that it can be easily centrifuged. Because of the shape that is easily pushed against the inner wall of the suction tube by force, the function of crushing the clot and scraping off the clot attached to the inner wall of the suction tube is considered to be slightly higher.

  In laparotomy and conventional endoscopic surgery, a suction tube having a larger outer diameter can be used, and the effective area in the suction tube can be increased. Therefore, the width d is 0.8 mm as a plate material constituting the rotating body. Further, a rotating body can be configured even with a plate material having a thickness t larger than 0.4 mm.

  Next, a third embodiment of the surgical suction instrument according to the present invention will be described. The surgical suction instrument 31 of this embodiment is the same as the surgical suction instrument 1 of the first embodiment except that the relative position of the distal end portion 32a of the suction tube 32 and the distal end portion 33a of the rotating body 33 is different. Only the relevant position of the tip will be described. 10 is a cross-sectional view of the vicinity of the distal end portion 31a of the surgical suction instrument 31 of the present embodiment, and FIG. 11 is an explanatory view showing a state in which the distal end portion 31a is in contact with the organ 11 or the like.

  As shown in FIG. 10, in the surgical suction instrument 31 of the present embodiment, the rotating body distal end portion 33a is disposed at a position slightly retracted toward the operation portion side from the suction tube distal end portion 32a. The distance L at which the rotating body tip 33a moves backward from the suction tube tip 32a is 0.2 mm.

  When the suction tube tip 32a comes into contact with an organ or the like, the lumen of the suction tube 32 is at a lower pressure than the surgical field during the suction operation, so that the contacted organ or the like is slightly attracted to the lumen. . In this embodiment, the distance is considered when a suction pressure of 1/20 of the atmospheric pressure is applied to a suction tube having an outer diameter of 3 mm and an inner diameter of 2.8 mm by using a suction device usually used for suction work in an operating room. L was determined. Due to this suction pressure, the organ or the like tends to be drawn into the suction port 32a. However, since the organ or the like has rigidity, the amount sucked into the suction tube is 0.1 mm or less. Therefore, if the rotating body distal end portion 33a is retracted about 0.2 mm from the suction tube distal end portion 32a, the organ 11 or the like does not directly contact the rotating body distal end portion 33a, and unnecessary damage does not occur. As a result, a part of a damaged organ or the like is not caught in the suction tube.

  On the other hand, since the blood clot does not have rigidity even if the viscosity increases, if the surgical suction instrument is pushed forward, the suction tube distal end portion 32a can easily enter into the clot, and a part of the blood clot is entered as it enters. It enters into the suction tube 32 from the suction tube tip 32a and is subdivided. Therefore, even if the rotating body tip 33a is positioned slightly behind the suction tube tip 32a, the ability to subdivide the clot at the rotating body tip 33a does not deteriorate.

  Even when the same suction pressure is applied, the amount of the organ sucked into the suction tube increases if the inner diameter of the suction tube is large, and the amount of penetration decreases if the inner diameter of the suction tube is small. Moreover, if the suction pressure changes, the amount of entering changes. Incidentally, in the present embodiment, the above-mentioned L is set to 0.2 mm because a surgical suction instrument in which the value of L is changed little by little is prototyped and a suction device usually used for suction work in an operating room is used. With a suction pressure of 1/20 of atmospheric pressure considerably higher than the suction pressure that can be generated applied to the suction tube with an inner diameter of 2.8 mm, the tip is pressed against an organ or the like to determine whether or not damage occurs. The test was repeated and the results were determined. When a surgical suction instrument having a suction pressure or an inner diameter of a suction tube different from that of the present embodiment is manufactured, the same test may be performed to determine the value of L.

  FIG. 11 shows a state in which the surgical suction instrument tip 31a is inserted into the back of the chest cavity and reaches the organ 11 or the like. The suction tube distal end portion 32a is almost covered with the organ 11 or the like, and the flow in the suction tube 32 becomes slow and almost stagnant even when the suction device is working. In the suction tube 32, a suction pressure of about 1/20 of the atmospheric pressure is generated when a suction device usually used for a suction operation in an operating room is used.

  The organ 11 or the like 11 tends to be drawn into the suction port 32a by this suction pressure. However, since the organ 11 has rigidity, the amount M sucked into the suction tube is 0.1 mm or less. On the other hand, since the distance L at which the rotating body distal end portion 33a retracts from the suction tube distal end portion 32a is 0.2 mm, the organ 11 does not directly contact the rotating body distal end portion 33a, and unnecessary damage does not occur. . As a result, a part of the damaged tissue is not caught in the suction tube.

  In the past, it was extremely difficult to take the clot with increased viscosity out of the body, so it was thought that "If there is a bleeding, let's stop the operation." This problem was solved by using.

  In the above-described embodiment, the surgical suction instrument of the present invention using a 3 mm suction tube has been described with the use of the needles in mind, but the rotation of the suction tube folded into a U shape is described. The idea of subdividing the clot with increased viscosity by rotating the body at high speed and taking it out of the body by suction can be used in laparotomy and conventional endoscopic surgery. Expected to be widely used.

DESCRIPTION OF SYMBOLS 1 Suction instrument for surgery of Example 1 1a Same tip part 2 Suction tube 2a Same tip part 2b Same inner wall 3 Rotating body 3a Same tip part 4 Operation part 4a Small motor 4b Suction pipe connection part 4c Small motor connection part 4d Contact officer 6 Thoracic cavity 7 Pleura 8 Lung 9 Lavage fluid, etc. 10 Clot 10 a Crushed clot 11 Organ 23 Rotating body 31 of surgical suction instrument of Example 2 Surgical suction instrument 31 a of Example 3 Same as tip 32 The suction tube 32a of the surgical suction instrument of Example 3 is the same as the distal end portion 33. The rotary body 33a of the surgical suction instrument is the same as that of the third embodiment.

Claims (3)

A suction tube that connects a distal end portion (hereinafter referred to as “aspiration tube distal end portion”) that is inserted into a patient's body cavity and serves as a suction port for an aspiration target, and an operation portion that is outside the patient's body and that is operated by an operator. When,
A rotating body made of a wire material or a plate material, which is housed inside the suction tube, arranged over substantially the entire length of the suction tube, and bent into a U-shape that is reversed at the tip of the suction tube;
A surgical suction instrument comprising a small motor for rotating the rotating body at high speed.   The surgical suction instrument according to claim 1, wherein the suction tube has an outer diameter of 3 mm or less.   3. The surgical suction instrument according to claim 1, wherein a distal end portion (hereinafter referred to as “rotary body distal end portion”) of the rotating body that is bent into a U-shape is used for the suction. A surgical suction instrument that is positioned slightly retracted from the distal end of the tube toward the operation unit.

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