CN109833081B

CN109833081B - Gas filling and recycling system for laparoscopic surgery

Info

Publication number: CN109833081B
Application number: CN201811540013.2A
Authority: CN
Inventors: 朱健; 刘国宁; 高俊
Original assignee: Jiangsu Regrown Medical Technology Co ltd
Current assignee: Jiangsu Regrown Medical Technology Co ltd
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-05-26
Anticipated expiration: 2038-12-17
Also published as: WO2020125030A1; CN109833081A

Abstract

The invention discloses a gas perfusion and recirculation system for laparoscopic surgery, which comprises a gas pump, a gas injection device, a first puncture outfit, a second puncture outfit, a filter and a control module for controlling the gas injection device, the gas pump and a pressure sensor, wherein the first puncture outfit comprises a gas inlet channel and a smoke exhaust channel, the gas injection device is communicated with the gas inlet channel through a gas inlet pipeline, the gas pump is communicated with the smoke exhaust channel through a gas exhaust pipeline, the filter is arranged on the gas exhaust pipeline, the gas pump is configured to inject gas in the smoke exhaust channel into the gas injection device, and the pressure sensor is communicated with the second puncture outfit through a pressure measuring pipeline. The invention detects the air pressure in the abdominal cavity through the pressure sensor, and the air injection device can accurately control the air entering the surgical cavity and keep the pressure in the surgical cavity stable.

Description

Gas filling and recycling system for laparoscopic surgery

Technical Field

The invention relates to the field of medical equipment, in particular to a gas perfusion and recirculation system for laparoscopic surgery.

Background

During minimally invasive surgery, because organs or other tissues of a human body are extruded together, no enough space is available for observation and surgery, the pneumoperitoneum machine is required to provide air pressure to enlarge the inner cavity so as to provide a proper surgical space and a surgical field, and the air pressure is unstable, so that the soft tissues are displaced along with the change of the air pressure, and the judgment of a doctor on the accurate position of a surgical part is influenced. When the conventional pneumoperitoneum machine works, the intra-abdominal pressure is lower than a set value after inflation, and at the moment, an inflation valve in the machine is opened to inflate the abdominal cavity at a set flow rate. When the pressure in the abdominal cavity reaches a set value, the inflation valve is closed, and the inflation is stopped. As the operation progresses, air leakage occurs along with the movement of the operation puncture outfit to enter and exit, flush the abdominal cavity, suck flushing fluid, take out a specimen and the like, and the pressure in the abdominal cavity is reduced. When the air pressure is lower than the set value, the inflation valve is opened again for inflation. The "inflation-pressure measurement" process of a conventional pneumoperitoneum machine is referred to as a duty cycle. The whole operation process is repeatedly repeated, and a working cycle is formed, namely, the periodic impact pressure is formed. The impact pressure value varies with gas leakage during the operation. This pressure variation can cause the following: (1) such an abdominal organ ischemia-reperfusion-ischemia caused by the gas impact pressure may be aggravated. (2) Both basic and clinical studies on pneumoperitoneum causing morphological changes in the peritoneum are based on a model of a conventional pulsatile pneumoperitoneum machine. Such as: the scholars report that the phenomena of mesothelial cell swelling, peritoneal mesothelial cell connection breakage, basement membrane continuity interruption and the like of mouse peritoneum and human peritoneum under pneumoperitoneum environment under an electron microscope respectively (3) the sudden death probability of patients in operation can be increased due to the fact that the heart and lung burden is increased caused by the fact that the instantaneous pressure in the abdominal cavity is increased, and particularly the elderly and the patients with heart and lung dysfunction before operation are known. (4) As the surgical procedure is prolonged and the surgical wound increases, the impact force caused by the instantaneous pressure increase may increase the amount of CO2 gas entering the blood circulation through the wound, and aggravate acidosis of the patient. Therefore, to ensure the safety of the operation, the stability of the air pressure provided by the pneumoperitoneum machine is important.

In addition, in clinical medicine, when an electrotome in the puncture outfit cauterizes or electrically coagulates human tissues, a large amount of smoke and water vapor are inevitably generated, the smoke generated by the combustion of organic matters is a strong carcinogen, which can cause unnecessary injuries to operators and medical staff in an operating room, and when a deep operation of a human body is performed, especially when important organs such as deep blood vessels are electrocauterized, the smoke can obscure an electron microscope inside, which affects the sight of the medical staff, causes difficulty in hemostasis, even causes blindness or confusion of the operation, so that a smoke removal device is needed to ensure the smoothness of the operation. Currently, the current situation of smoke removal in operating theatres: 1) the traditional method is to open an exhaust valve of the puncture cannula to directly remove smoke until the visual field is clear and then close the valve. If the valve is not closed in time, the pneumoperitoneum pressure is reduced, the valve needs to be closed to wait for the pneumoperitoneum pressure to rise again, and then the operation can be continued, so that the continuity of the operation is broken. The chimney effect of the laparoscope causes air flow to rush to operating room staff from the laparoscope puncture cannula and be directly discharged into an operating room, and the physical harm and the environmental pollution of the operating room staff are caused. 2) The self-made controllable suction apparatus is adopted, although smoke can be continuously sucked, harmful operation smoke can still be discharged into an operation room or sucked into a negative pressure suction pump without harmless treatment, and equipment pollution is caused. And the patient needs to be continuously charged with carbon dioxide during the operation to maintain pneumoperitoneum repulsion, so that the use amount of the carbon dioxide and the risk of absorption of the patient are increased.

Disclosure of Invention

Aiming at the defects of the prior art, the invention mainly aims to overcome the defects of the prior art, discloses a gas perfusion and recirculation system for laparoscopic surgery, it is characterized by comprising an air pump, an air injection device, a first puncture outfit, a second puncture outfit, a filter and a control module for controlling the air injection device, the air pump and the pressure sensor, wherein the first puncture outfit comprises an air inlet channel and a smoke exhaust channel, the gas injection device is communicated with the gas inlet channel through a gas inlet pipeline, the gas pump is communicated with the smoke exhaust channel through a gas exhaust pipeline, the filter is arranged on the exhaust pipeline, the air pump is configured to inject air in the smoke exhaust channel into the air injection device, and the pressure sensor is communicated with the second puncture outfit through a pressure measuring pipeline.

Further, the pressure measuring pipeline is provided with the filter.

Further, the filter is arranged on the air inlet pipeline.

Further, the puncture device also comprises a sealing member for opening and closing the operation channel of the first puncture device.

Furthermore, the sealing element comprises a deformation body made of flexible materials, a gas inlet and outlet channel is arranged on the deformation body, a through hole is arranged on the deformation body, and the circle center of the through hole and the central shaft of the puncture cannula are on the same straight line; when air is fed, the deformation body expands to shrink the through hole; when exhausting, the deformation body contracts and the through hole expands.

Furthermore, the deformation body is arranged in a split mode and is composed of at least two parts.

Further, the deformation body is annular, and the through hole is provided in the center of the deformation body.

Further, the flexible material is one of rubber, plastic, thermoplastic elastomer and fabric with a sealing layer.

Furthermore, a guide frame used for limiting and guiding the deformation body to expand towards the center of the through hole is arranged on the periphery of the deformation body.

Furthermore, the periphery of the deformable body is provided with a fixing edge, and the deformable body and the guide frame are fixed through the fixing edge.

The invention has the following beneficial effects:

compared with the traditional system, the invention detects the air pressure in the abdominal cavity in real time through the pressure sensor, and the gas injection device can accurately control the gas entering the surgical cavity in real time and keep the pressure in the surgical cavity stable. Due to the real-time suction of the gas pump, the smoke in the operation cavity can be discharged in time, quickly and efficiently, thereby ensuring the continuity and high efficiency of the operation. Because the air pump enables the gas to be recycled, the danger of harm to the body of workers in the operating room and the risk of environmental pollution are reduced. In addition, through the setting of sealing member to the sealing member main part is the variant that is supported by flexible material, strong adaptability, and its through-hole can be adjusted according to surgical instruments's size, and sealing performance is reliable moreover, and product clinical use is safe. In addition, the deformation body is matched with the guide frame for use, so that the deformation body is ensured to expand towards the circle center of the through hole, the deformation body is tightly attached to a surgical instrument, and the sealing property is greatly improved; through the gas access passage, the internal gas of control deformation body can contract the through-hole to sealed, also can expand the through-hole, makes things convenient for the change of surgical instruments and takes out the tissue excision thing.

Drawings

FIG. 1 is a schematic view of a gas infusion and recirculation system for laparoscopic surgery according to the present invention;

FIG. 2 is a perspective view of a puncture instrument of the present invention;

FIG. 3 is a top view of the sheath assembly;

FIG. 4 is a right side view of the sheath assembly;

FIG. 5 is a cross-sectional view taken along line L-L in FIG. 4;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 7 is a cross-sectional view of C-C of FIG. 3;

FIG. 8 is a cross-sectional view of Q-Q of FIG. 4;

FIG. 9 is a schematic view of the seal configuration;

FIG. 10 is a schematic view of the installation of the guide frame;

FIG. 11 is a top view of the guide frame;

FIG. 12 is a cross-sectional view taken along line B-B of FIG. 11;

FIG. 13 is a schematic structural view of another variation;

FIG. 14 is a cross-sectional view of M-M in FIG. 4;

FIG. 15 is a cross-sectional view of O-O in FIG. 4;

FIG. 16 is a cross-sectional view taken along line P-P of FIG. 4;

the reference numbers are as follows:

1. puncture rod, 2, sheath tube component, 3, sealing element, 6, filter, 7, first puncture outfit, 8, second puncture outfit, 9, control module, 21, outer tube, 22, inner tube, 23, smoke exhaust channel, 24, air inlet channel, 25, partition plate, 26, through hole, 31, deformation body, 32, gas inlet and outlet channel, 33, guide frame, 34, fixing edge, 35, air inlet valve, 36, exhaust valve, 41, first channel, 42, second channel, 43, third channel, 51, air inlet pipeline, 52, exhaust pipeline, 53, pressure measuring pipeline, 211, exhaust port, 212, air inlet, 213, air outlet, 221, opening, 311, through hole, 331, guide plate, 332,

support plate

334, 333, positioning column, positioning hole, 341, fixing hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The gas perfusion and recirculation system for laparoscopic surgery of the present invention, as shown in fig. 1, comprises a gas pump, a gas injection device, a first puncture outfit, a second puncture outfit, a filter and a control module 9 for controlling the gas injection device, the gas pump and a pressure sensor, wherein the first puncture outfit 7 comprises a gas inlet channel 24 and a smoke exhaust channel 23, the gas injection device is communicated with the gas inlet channel 24 through a gas inlet pipeline 51, the gas pump is communicated with the smoke exhaust channel 23 through a gas exhaust pipeline 52, the filter 6 is arranged on the gas exhaust pipeline 52 for filtering the gas sucked out from the inside of the abdominal cavity, the filtered gas is re-injected into the gas injection device through the gas pump, and the gas is re-injected into the abdominal cavity through the gas injection device. In addition, the pressure sensor is connected 8 to the second puncture instrument via a pressure measuring line 53. The pressure sensor measures the pressure in the abdominal cavity in real time through the pressure measuring pipeline 53, and feeds data back to the control module 9, and when the pressure is too small according to the measured pressure, the control module 9 controls the gas injection device to increase the gas injection amount; otherwise, the gas injection amount is reduced. The stability of the air pressure in the abdominal cavity is achieved. In addition, in order to prevent impurities from existing in the gas source connected to the gas injection device or impurities from existing in the recycled gas, a filtering device is disposed on the gas inlet pipeline 51 to prevent impurities from entering the abdominal cavity and causing secondary damage to the human body. In a preferred embodiment, during operation, when the electric knife cauterizes or electrocoagulates human tissues, a large amount of smoke and vapor are inevitably generated, and these may enter the pressure sensor, which may affect the detection accuracy of the sensor, even reduce the service life of the sensor, so that the pressure measuring pipeline 53 is provided with a filter to filter the gas and measure the pressure. The pressure measurement and the inflation are carried out simultaneously, so that the air pressure in the abdominal cavity can be measured in real time, and the influence of the inflation end on the measurement data of the pressure sensor can be reduced. Compared with the existing measuring equipment, the existing measuring equipment can not obtain the real-time pressure in the abdominal cavity by periodically carrying out inflation and pressure measurement, the fluctuation of the control of the gas injection amount by the gas injection equipment is large, and the abdominal cavity is large for a moment and small for a moment, so that the operation of the operation is not facilitated; in addition, over-inflation may cause injury to the human body again.

The control module 9 comprises an operation display module, an operation control module and a main control module, and the preset pressure is set through the display module and displays the real-time pressure value in the abdominal cavity. The pressure sensor transmits detected data to the main control module, when the pressure is lower than the preset pressure, the main control module transmits a signal to the operation control module, and the operation control module controls the gas injection device to increase the gas injection amount. Otherwise, the gas injection amount is reduced.

Typically, the puncture device comprises a surgical channel, a smoke evacuation channel 23 and an air intake channel 24. In one embodiment, as shown in fig. 2-16, the puncture outfit comprises a puncture rod 1 for creating a through-hole and a sheath assembly 2 as a surgical channel sleeved outside the puncture rod 1, wherein the sheath assembly 2 comprises an outer tube 21 and an inner tube 22, the outer tube 21 is sleeved outside the inner tube 22, and the thin ends of the outer tube 21 and the inner tube 22 are connected together to form a sandwich; it is conceivable that the thin end of the outer tube 21 gradually converges toward the center from the top to the bottom in order to allow the sheath assembly 2 to be easily inserted into the abdominal cavity. The head of the outer tube 21 is also provided with an exhaust port 211 for exhausting air. A smoke evacuation channel 23 is provided in the sandwich, and an opening 221 is provided at the narrow end of the inner tube 22, through which the exhaust port 211 communicates with the opening 221. Wherein, the interlayer can be directly used as the smoke exhaust channel 23 to communicate the exhaust port 211 with the buckle 221; it is also possible to provide a pipe as a smoke evacuation channel 23 in the sandwich layer and to use the sandwich layer as a protective jacket for the pipe.

In one embodiment, the air intake device further comprises an air intake port 212 and an air intake passage 24, wherein the air intake port 212 is arranged at the head part of the outer tube 21, an air outlet port 213 is arranged at the thin end of the outer tube 21, and the air intake port 212 and the air outlet port 213 are communicated through the air intake passage 24; i.e. gas enters the inlet channel 24 through the inlet 212 and then exits through the outlet 213.

In a preferred embodiment, the air outlet 213 is an elongated structure, and has a crescent shape, and at least one air outlet 213 is disposed at the thin end of the outer tube 21 and extends from the center of the thin end of the outer tube 21 to the periphery. The slender outlet can accelerate the gas ejection speed, so that the gas can be ejected farther, and the interference to the gas flow at the smoke exhaust port is reduced. Preferably, a plurality of gas outlets 213 are uniformly formed around the circumference of the thin end of the outer tube 21, so that the gas can be injected at all angles.

In a preferred embodiment, as shown in fig. 4-5, two partition plates 25 are vertically arranged in the interlayer between the outer pipe 21 and the inner pipe 22 to divide the interlayer into an air inlet channel 24 and a smoke exhaust channel 23, and an opening 221 is formed between the two partition plates 25.

The opening 221 is arranged at the thin end of the sheath tube assembly 2, so that the opening is positioned near a surgical instrument, and the opening 221 is small, so that the suction force at the opening 211 is large, smoke near the surgical instrument can be quickly sucked away, and the visual field of an operation area is kept clear; and a plurality of crescent-shaped gas outlets 213 are uniformly arranged, and similarly, the slender gas outlets 213 accelerate the gas injection speed, so that the gas can be injected farther. If the gas outlet 213 is set to be too large, the gas injection speed is slow, the gas can only be injected near the gas outlet 213, the suction force at the opening 221 is large, and the gas just sprayed out of the gas outlet 213 is immediately discharged by the opening 221, so that the smoke discharge effect is greatly reduced.

In one embodiment, the puncture rod 1 for creating a through opening and the sheath assembly 2 sleeved outside the puncture rod 1 and used as a surgical channel are included, the sheath assembly 2 includes an outer tube 21 and an inner tube 22, the outer tube 21 is sleeved outside the inner tube 22, and the thin ends of the outer tube 21 and the inner tube 22 are connected together to form a sandwich layer; it is conceivable that the thin end of the outer tube 21 gradually converges toward the center from the top to the bottom in order to allow the sheath assembly 2 to be easily inserted into the abdominal cavity. The head of the outer tube 21 is also provided with an exhaust port 211 for exhausting air. A smoke evacuation channel 23 is provided in the sandwich, and an opening 221 is provided at the narrow end of the inner tube 22, through which the exhaust port 211 communicates with the opening 221. Wherein, the interlayer can be directly used as the smoke exhaust channel 23 to communicate the exhaust port 211 with the buckle 221; it is also possible to provide a pipe as a smoke evacuation channel 23 in the sandwich layer and to use the sandwich layer as a protective jacket for the pipe.

In a preferred embodiment, the air outlet 213 is an elongated structure, and has a crescent shape, and at least one air outlet 213 is disposed at the thin end of the outer tube 21 and extends from the center of the thin end of the outer tube 21 to the periphery. The slender outlet can accelerate the gas to be sprayed out, so that the gas can be sprayed farther, and the gas pressure in the whole abdominal cavity is kept stable. Preferably, a plurality of gas outlets 213 are uniformly formed around the circumference of the thin end of the outer tube 21 so that the gas can be injected in place at various angles.

In one embodiment, the surgical instrument further comprises a sealing element 3 for opening and closing the surgical channel, the sealing element 3 is arranged at the head part of the inner tube 22, and when the surgical instrument is in the operating room, the sealing element 3 is tightly attached to the surgical instrument to achieve the sealing effect; when the surgical instrument and the tissue cutting object are taken out, the sealing element 3 is opened to facilitate the taking out of the surgical instrument and the tissue cutting object, and after the surgical instrument and the tissue cutting object are taken out, the sealing element 3 is sealed again to cut off a surgical channel.

As shown in fig. 6 and 9-13, the sealing member 3 includes a deformable body 31 made of a flexible material, and a gas inlet and outlet passage 32 is provided on the deformable body, and the deformable body is expanded or contracted by inflating or deflating the deformable body; the gas inlet and outlet passage 32 can be opened and closed by an inlet valve 35 and an exhaust valve 36 to perform the inlet and exhaust functions. Of course, it can be easily understood that only one air hole is arranged on the deformation body 31, the air hole is compatible with air inlet and exhaust functions, the air hole is externally connected with two valves, and the air inlet and exhaust functions are realized through valve control. Two air holes can be independently arranged to realize air exhaust and air intake.

The deformation body 31 is provided with a through hole 311, and surgical instruments enter the abdominal cavity through the through hole 311. The center of the through hole 311 is on the same straight line with the central axis of the inner tube 22; when the air inlet valve 35 is opened, the air enters the deformable body, and the deformable body expands to shrink the through hole 311 and wrap the surgical instrument, so that the sealing function is realized; if no surgical instrument is placed in the through hole 311, the interior of the deformation body is inflated and expanded, and the through hole 311 is contracted until it is closed. When the valve inlet is closed, the exhaust valve 36 is opened, and the gas in the deformation body is exhausted, the deformation body contracts, and the through hole 311 expands, so that the surgical instrument can be conveniently taken out; in addition, the air in the deformable body is pumped through the air inlet and outlet channel 32, and the deformable body is made of flexible materials, so that the through hole 311 expands towards the periphery of the deformable body, the diameter of the through hole 311 is opened to the maximum, and the placement and the taking out of surgical instruments are not influenced. The cross section of the deforming body 31 is a symmetrically arranged cone-shaped structure. Facilitating the shrinkage of the via 311.

In one embodiment, the deformable body 31 is provided as a separate body, consisting of at least two parts. The deformable body 31 is formed by splicing two parts; this can improve the sealing property of the through hole 311. When the deformable body 31 is divided into a plurality of parts around the center of the through hole 311, it is conceivable that the parts are expanded toward the center of the circle when the parts are inflated, and a better sealing effect can be achieved. In addition, when the deformable body 31 has a split structure, as shown in fig. 13, the cross section of the deformable body 31 has a cone-shaped structure, and the deformable body is composed of two parts, and the joint thereof corresponds to a through hole 311 for passing a surgical instrument therethrough, so that the sealing effect can be satisfied without additionally providing the through hole 311.

In one embodiment, the transformation body 31 has a ring shape, and the through hole 311 is disposed at the center of the transformation body 31. Thus, the deformable body 31 and the through hole 311 are concentric, so that the deformable body 31 is uniformly stressed during inflation, and the phenomenon that the position of part of the deformable body 31 is over-expanded to cause the deformable body 31 to expand and deform to influence the sealing performance of the through hole 311 is avoided.

In one embodiment, the flexible material is rubber, which is a high elastic polymer compound, has elasticity and good sealing performance, and can be closely attached to a surgical instrument when inflated. Of course, the flexible material may also be a plastic, a thermoplastic elastomer or a fabric with a sealing layer.

In one embodiment, as shown in fig. 10 to 12, in order to prevent the deformation body 31 from expanding in two directions, i.e., up and down, during inflation, which results in waste of gas, the deformation efficiency of the deformation body 31 is low, the pressing force is dispersed, and the sealing effect of the through hole 311 is greatly reduced. Therefore, a guide frame 33 for restricting and guiding the deformation body 31 to expand toward the center of the through hole 311 is provided around the deformation body 31. The guide frame 33 includes a guide plate 331 and a support plate 332, the guide plate 331 is attached to the support plate 332 and has a concave cross section, and the deformable body 31 is disposed between the guide plate 331 and the support plate 332, i.e., disposed in a concave groove of the concave cross section, and restricts upward and downward expansion of the deformable body 31 so as to be expanded and deformed toward the center of the through hole 3. In a specific embodiment, a plurality of positioning posts 333 are disposed on the contact surface of the guide plate 331 and the support plate 332, and a positioning hole 334 matching with the positioning position 511 is disposed at a corresponding position of the support plate 332, in order to enable the guide plate 331 and the support plate 332 to be firmly connected together, the positioning hole 334 is in interference fit with the positioning posts 333; in order to facilitate the installation of the guide frame 33 in the puncture instrument, the positioning post 333 is protruded from the positioning hole 334 to fix the protruded portion to the puncture instrument, and thus, the installation of more mounting members can be avoided.

In the above embodiment, the fixing edge 34 is provided at the periphery of the deformable body 31, and the deformable body 31 is fixed to the guide frame 33 through the fixing edge 34, so that the deformable body 31 is prevented from being displaced and the sealing effect of the through hole 311 is prevented from being affected. Preferably, the fixing portion 34 may be provided with a fixing hole 341 corresponding to the positioning post 333.

In order to improve the sealing effect of the seal, a plurality of deformation bodies 31 may be stacked. The two variants 31 are generally arranged in parallel.

In a specific embodiment, as shown in fig. 2-16, the outer tube 21 is sleeved outside the inner tube 22, and three sealing rings are coaxially disposed in the interlayer of the head portion of the outer tube, as shown in fig. 6, to horizontally divide the interlayer into a first air passage 41 and a second air passage 42, as shown in fig. 15, a through hole 26 is disposed at a position of the inner tube 22 corresponding to the end of the smoke evacuation channel 23, so that the second air passage 42 is communicated with the smoke evacuation channel 23, and the second air passage 42 is communicated with the exhaust port 211. In addition, the sealing element 3 is fixed to the inner tube 22 by two sealing rings, a third air passage 43 is formed by the two sealing rings, the air inlet/outlet passage 32 of the sealing element 3 is directly communicated with the third passage 43, and a connecting hole is formed in the inner tube 22 to communicate the second passage 42 with the third passage 43, as shown in fig. 16.

The gas inlet and outlet passage 32 of the deformable body 31 communicates with the gas inlet 212 and the gas outlet 211 through the gas inlet valve 35 and the gas outlet valve 36, respectively. The intake passage 24 directly communicates with the intake port 212. When the gas pump is used, a gas source directly enters the gas inlet channel 24 from the gas inlet 212 and is discharged from the gas outlet 213 to inflate the abdominal cavity, when the gas pressure in the abdominal cavity reaches a specified pressure, the gas pump pumps the gas through the smoke exhaust channel 23, the gas in the abdominal cavity enters the smoke exhaust channel 23 from the opening 221 and then enters the second gas channel 42, and then the gas is directly discharged from the gas outlet 211, and as the gas outlet 213 end is a positive pressure, the opening 221 is a negative pressure, and the pressure difference between the two positions is large, the smoke generated in the operation can be rapidly discharged from the opening 221; and because the opening 221 is arranged at the end part of the thin end of the inner tube 22, the opening is close to the surgical instrument, and the suction force of the opening 221 is large, smoke nearby the instrument can be quickly extracted, and the visual field nearby the instrument is ensured to be clear. In addition, when the surgical instrument extends from the surgical channel, the surgical channel needs to be sealed, the air inlet valve 35 is opened, the air at the air inlet 213 enters the third air channel 43 through the first air channel 41, and then enters the deformable body 31 from the air inlet/outlet channel 32, so that the deformable body 31 expands to be tightly attached to the surgical instrument, and the sealing function is realized. When the surgical instrument needs to be taken out, the air inlet valve 35 is closed, the air outlet valve 36 is opened, the air in the deformable body 31 is rapidly discharged by means of the negative pressure of the air pump, the deformable body contracts reversely, the through hole 311 is opened, and the surgical instrument and the tissue resection objects are convenient to take out.

When the device is used, as shown in fig. 1, a carbon dioxide gas source is introduced into the gas injection device, the pressure required by the control module 9 in the abdominal cavity is set, then the gas injection device adjusts the output quantity, the gas is sent into the abdominal cavity through the gas inlet channel 24 through the gas inlet pipeline 51, and the gas in the abdominal cavity is filtered through the gas pump through the gas outlet pipeline 52 and then is sent back into the gas injection device, so that the gas is recycled. The pressure sensor detects the pressure in the abdominal cavity in real time through the second puncture device 8 and transmits the data to the control module 9. The control module 9 further has pressure data for adjusting the gas injection amount of the gas injection device.

The above are merely preferred embodiments of the present invention, and are not intended to limit the scope of the invention; it is intended that the following claims be interpreted as including all such alterations, modifications, and equivalents as fall within the true spirit and scope of the invention.

Claims

1. A gas perfusion and recirculation system for laparoscopic surgery, comprising a gas pump, a gas injection device, a first puncture outfit, a second puncture outfit, a filter, a pressure sensor, and a control module for controlling the gas injection device, the gas pump, and the pressure sensor, wherein the first puncture outfit comprises a gas inlet channel and a smoke exhaust channel, the gas injection device is communicated with the gas inlet channel through a gas inlet pipeline, the gas pump is communicated with the smoke exhaust channel through a gas exhaust pipeline, the filter is arranged on the gas exhaust pipeline, the gas pump is configured to inject gas of the smoke exhaust channel into the gas injection device, the pressure sensor is communicated with the second puncture outfit through a pressure measuring pipeline, the pressure sensor detects pressure in abdominal cavity in real time through the second puncture outfit and transmits pressure data to the control module, the control module adjusts the gas injection amount of the gas injection device according to the pressure data; further comprising a seal for opening and closing the surgical channel of the first penetrator; the sealing element comprises a deformation body made of flexible materials, a gas inlet and outlet channel is arranged on the deformation body, a through hole is arranged on the deformation body, and the circle center of the through hole and the central shaft of the puncture cannula are on the same straight line; when air is fed, the deformation body expands to shrink the through hole; when exhausting, the deformation body contracts, the through hole expands, and the through hole is used for the operation channel of the surgical instrument; the first puncture outfit comprises a puncture rod for forming a through hole and a sheath tube assembly which is sleeved outside the puncture rod and is used as a surgical channel, wherein the sheath tube assembly comprises an outer tube and an inner tube, the outer tube is sleeved outside the inner tube, and the thin ends of the outer tube and the inner tube are connected together to form an interlayer; two clapboards are vertically arranged in the interlayer of the outer pipe and the inner pipe to divide the interlayer into the air inlet channel and the smoke exhaust channel.

2. A gas infusion and recirculation system for laparoscopic surgery according to claim 1, wherein said filter is disposed on said pressure measuring line.

3. The gas perfusion and recirculation system for laparoscopic surgery of claim 1, wherein said filter is disposed on said gas inlet line.

4. The gas perfusion and recirculation system for laparoscopic surgery of claim 1, wherein said deformable body is provided in a split manner, consisting of at least two parts.

5. The gas perfusion and recirculation system for laparoscopic surgery of claim 1, wherein said deformable body has a ring shape and said through hole is provided at the center of said deformable body.

6. The gas infusion and recirculation system for laparoscopic surgery of claim 1, wherein said flexible material is one of plastic, thermoplastic elastomer and fabric with a sealing layer.

7. The gas perfusion and recirculation system for laparoscopic surgery of claim 1, wherein said deformable body is peripherally provided with a guide frame for limiting and guiding the expansion of said deformable body toward the center of said through hole.

8. The gas perfusion and recirculation system for laparoscopic surgery of claim 7, wherein said deformable body is provided at its periphery with fixing edges by which said deformable body is fixed to said guide frame.