A fascial tissue expansion device for a retroperitoneal laparoscopic surgical operating channel

Abstract

The utility model discloses a kind of fascial tissue expansion devices of retroperitoneal laparoscopic surgical operation channel, including syringe, the inside of syringe has movable cavity, the rear end of syringe is provided with piston rod in movable cavity sliding fit;Syringe front end is equipped with air inlet, air inlet is equipped with the first check valve of one-way air intake into movable cavity;Syringe is communicated with first connecting pipe, first connecting pipe is communicated with three-way valve;Three-way valve has input end, output end and pressure relief end, three-way valve is rotatably fitted with valve core, valve core is equipped with respectively with the air passage groove of input end, output end and pressure relief end cooperation;Second check valve is equipped in the air passage groove one-way air intake of input end, input end is communicated with first connecting pipe, output end is communicated with second connecting pipe;The end of second connecting pipe is communicated with air bag.The utility model can monitor air bag gas pressure in real time and can prevent gas backflow in air bag, can support single person operation, without frequently switching three-way valve.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a fascia tissue expansion device for a retroperitoneal laparoscopic surgical operating channel. Background Technology

[0002] In retroperitoneal laparoscopic surgery, establishing a safe and effective operating channel is crucial for surgical success. The retroperitoneal space has a complex anatomy and dense fascia. Current dilation devices, often made by temporarily binding drainage tubes and gloves, are relatively rudimentary and have revealed numerous problems in practice. However, with technological advancements, a Chinese utility model patent (CN214856997U) proposes a peritoneal dilator for urological laparoscopic surgery. While this device features a three-way connector to link the components, the first, second, and third channels of this three-way connector are equipped with manual valves (one, two, and three, respectively). During actual surgery, medical staff must frequently manually switch the opening and closing of these valves to achieve functions such as inflation and depressurization. This process is not only cumbersome and requires high precision in coordination among medical personnel, but it can also prolong surgical preparation time due to delayed coordination and may increase the risk of gas leakage, thereby affecting the dilation efficiency of the fascia. The device lacks a pressure monitoring component and relies solely on experience to determine the inflation level, which may lead to inaccurate pressure control. This makes it difficult for doctors to accurately assess the pressure within the balloon during operation. Insufficient inflation may result in inadequate expansion of the fascia tissue, failing to create sufficient surgical space. Overinflation may not only cause balloon rupture and debris to remain in the incision, but may also cause irreversible damage to surrounding tissues due to excessive pressure. Utility Model Content

[0003] The purpose of this invention is to provide a fascia expansion device for the retroperitoneal laparoscopic surgical operating channel. This invention can monitor the gas pressure of the balloon in real time and prevent gas backflow within the balloon, supports single-person operation, and eliminates the need for frequent switching of the three-way valve.

[0004] The technical solution of this utility model is as follows: A fascia tissue expansion device for a retroperitoneal laparoscopic surgical operating channel, comprising a syringe, the syringe having a movable cavity inside, and a piston rod slidably engaged within the movable cavity at the rear end of the syringe; an air inlet is provided at the front end of the syringe, and a first one-way valve for unidirectional air intake into the movable cavity is provided in the air inlet; the syringe is connected to a first connecting tube, and the first connecting tube is connected to a three-way valve; the three-way valve has an input end, an output end, and a pressure relief end, and a valve core is rotatably engaged within the three-way valve, with ventilation grooves respectively engaging with the input end, the output end, and the pressure relief end; a second one-way valve for unidirectional air intake is provided at the input end with ventilation grooves, the input end is connected to the first connecting tube, and the output end is connected to the second connecting tube; a pressure relief hole is provided at the pressure relief end; and an air bladder is connected to the end of the second connecting tube.

[0005] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operation channel, the first one-way valve includes a first retaining ring connected to the inner wall of the air inlet. The center of the first retaining ring has a first through hole and a plurality of first sector grooves arranged around the first through hole. The inner side of the first retaining ring is provided with a first valve fixed on the first through hole. The first valve fits against the first retaining ring to close the first sector groove.

[0006] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel, the outer wall of the input end is provided with a first groove, and the end of the first connecting tube is provided with a first limiting ring that engages with the first groove; the outer wall of the input end is also provided with a second limiting ring and a third limiting ring in sequence, and the inner wall of the first connecting tube is provided with a second groove that engages with the second limiting ring and the third limiting ring, forming a third groove between the second limiting ring and the third limiting ring, and a first sealing ring is embedded in the third groove.

[0007] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel, the outer wall of the output end is provided with a fourth groove, and the end of the second connecting tube is provided with a fourth limiting ring that engages with the fourth groove; the outer wall of the output end is also provided with a fifth limiting ring and a sixth limiting ring in sequence, and the inner wall of the second connecting tube is provided with a fifth groove that engages with the fifth limiting ring and the sixth limiting ring, forming a sixth groove between the fifth limiting ring and the sixth limiting ring, and a second sealing ring is embedded in the sixth groove.

[0008] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operation channel, the second one-way valve includes a second retaining ring connected to the inner wall of the input end. The center of the second retaining ring is provided with a second through hole and a plurality of second sector grooves arranged around the second through hole. The inner side of the second retaining ring is provided with a second valve fixed on the second through hole. The second valve fits against the second retaining ring to close the second sector groove.

[0009] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel, a pressure gauge is installed at the tip of the syringe.

[0010] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel, the balloon is made of medical-grade silicone, and the balloon and the second connecting tube are bonded together.

[0011] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel, a valve cover is fitted on the pressure relief end to seal the pressure relief hole.

[0012] In the aforementioned fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel, the second connecting tube has graduation lines.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The three-way valve of this utility model, through the cooperation of the valve core and the handle, allows switching between inflation, pressure holding, and pressure release states simply by rotating the handle, eliminating the need for frequent operation of multiple independent valves, simplifying the operation steps for medical staff, and shortening surgical preparation time. Furthermore, this utility model can be operated by a single medical staff member, saving manpower.

[0015] 2. This invention features a pressure gauge at the syringe tip that displays the real-time pressure inside the balloon, allowing doctors to intuitively monitor the degree of expansion and avoid complications caused by insufficient or excessive inflation. Furthermore, this invention uses a second one-way valve covering the second through-hole and second sector groove of the second retaining ring, allowing gas to flow only from the input end to the output end, preventing gas from flowing back into the pressure pump, ensuring stable pressure during expansion, and avoiding a decrease in expansion efficiency due to gas backflow.

[0016] 3. This invention, through the design of limiting rings, grooves, and sealing rings at the input and output ends, can prevent gas leakage and improve the sealing performance and reliability of the device. The pressure relief end of this invention is also equipped with a pressure relief hole and a valve cover. If the pressure is abnormal during inflation, it can be quickly relieved through the valve cover, ensuring patient safety in emergencies. Furthermore, the graduations on the second connecting tube of this invention can assist doctors in judging the insertion depth of the cuff, avoiding excessive insertion that could cause tissue damage. Attached Figure Description

[0017] Figure 1 This is the front view of this utility model;

[0018] Figure 2 This is a cross-sectional view of the syringe of this utility model;

[0019] Figure 3 This is a partial view A of the first check valve of this utility model when it is closed;

[0020] Figure 4 This is a schematic diagram of the three-way valve of this utility model;

[0021] Figure 5 This is a partial view B of the present invention;

[0022] Figure 6 This is a cross-sectional view of the three-way valve of this utility model;

[0023] Figure 7 This is a partial view C of the second one-way valve of this utility model during air intake;

[0024] Figure 8 This is a partial cross-sectional view of the present invention in its inflated state;

[0025] Figure 9 This is a partial exploded sectional view of this utility model;

[0026] Figure 10 This is a partial cross-sectional view of the present invention in the pressure-holding state;

[0027] Figure 11 This is a partial cross-sectional view of the present invention in the depressurized state.

[0028] The labels in the attached diagram are as follows: 1. Syringe; 101. Movable chamber; 102. Piston rod; 103. Air inlet; 104. First one-way valve; 105. First retaining ring; 106. First through hole; 107. First sector groove; 108. First valve; 2. First connecting tube; 3. Three-way valve; 301. Input end; 302. Output end; 303. Pressure relief end; 304. Second retaining ring; 305. Second through hole; 306. Second sector groove; 307. Second one-way valve; 308. Pressure relief hole; 309. First groove; 31. 0. First limiting ring; 311. Second limiting ring; 312. Third limiting ring; 313. Second groove; 314. Third groove; 315. First sealing ring; 316. Fourth groove; 317. Fourth limiting ring; 318. Fifth limiting ring; 319. Sixth limiting ring; 320. Fifth groove; 321. Sixth groove; 322. Second sealing ring; 323. Second valve; 4. Second connecting pipe; 5. Airbag; 6. Valve core; 601. Vent groove; 7. Handle; 8. Pressure gauge; 9. Scale line; 10. Valve cover. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0030] Example: A fascia expansion device for a retroperitoneal laparoscopic surgical access channel, configured as follows Figure 1 As shown. This device includes a syringe 1, the inside of which has a movable cavity 101, as shown. Figure 2As shown, the syringe 1 has a piston rod 102 at its rear end that slides within the movable cavity 101. The syringe 1 has an air inlet 103 at its front end, and a first one-way valve 104 within the air inlet 103 allows air to flow into the movable cavity 101 in one direction. The first one-way valve 104 includes a first retaining ring 105 connected to the inner wall of the air inlet 103. The first retaining ring 105 has a first through hole 106 at its center and multiple first sector-shaped grooves 107 arranged around the first through hole 106. A first valve 108 is fixed to the first through hole 106 on the inner side of the first retaining ring 105, and the first valve 108 fits against the first retaining ring 106 to close the first sector-shaped grooves 107. The air inlet 103 and the first one-way valve 104 ensure that when the piston rod 102 of the syringe 1 is pushed forward, the first valve 108, located inside the first retaining ring 105, allows air to flow into the movable cavity 101 under pressure. Figure 3 As shown, the first valve 108 is tightly abutted against the first retaining ring 105, sealing the first sector groove 107 and delivering gas through the first connecting tube 2 to the three-way valve 3, providing power for inflating the balloon 5. When the piston rod 102 moves backward to inhale, the air pressure inside the movable chamber 101 is lower than the external atmospheric pressure, causing the first valve 108 to disengage from the first retaining ring 105, allowing air to pass through the first sector groove 107. Gas enters the movable chamber 101 through the air inlet 103, achieving gas filling. A pressure gauge 8 is installed at the front end of the syringe 1 to display the pressure value inside the balloon 5 in real time, allowing the doctor to intuitively grasp the degree of expansion of the fascia tissue, avoiding under-inflation or over-inflation, and ensuring the proper establishment of the surgical operating space. The syringe 1 is connected to the first connecting tube 2, and the first connecting tube 2 is connected to the three-way valve 3. Figure 4 As shown, the three-way valve 3 has an input end 301, an output end 302, and a pressure relief end 303. A valve core 6 is rotatably fitted inside the three-way valve 3. The valve core 6 has vent grooves 601 that respectively mate with the input end 301, output end 302, and pressure relief end 303. The input end 301 has a second one-way valve 307 that allows gas to flow only from the input end 301 to the output end 302, preventing gas in the airbag 5 from flowing back to the pressure pump, ensuring stable pressure during expansion, and avoiding a decrease in expansion efficiency due to gas backflow. Figure 5 and Figure 6 As shown, the second one-way valve 307 includes a second retaining ring 304 connected to the inner wall of the input end 301. The second retaining ring 304 has a second through hole 305 at its center and a plurality of second sector-shaped grooves 306 arranged around the second through hole 305. A second valve 323 is fixed to the second through hole 305 on the inner side of the second retaining ring 304. The second valve 323 fits against the second retaining ring 304 to seal the second sector-shaped grooves 306. When air enters the second one-way valve 307, as... Figure 7 As shown, at this time, the second valve 323 separates from the second retaining ring 304, and the second sector groove 306 opens, allowing gas to enter. Figure 8 and Figure 9 As shown, the first connecting pipe 2 is connected to the input end 301. The outer wall of the input end 301 is provided with a first groove 309. The end of the first connecting pipe 2 is provided with a first limiting ring 310 that engages with the first groove 309. The outer wall of the input end 301 is also provided with a second limiting ring 311 and a third limiting ring 312 in sequence. The inner wall of the first connecting pipe 2 is provided with a second groove 313 that engages with the second limiting ring 311 and the third limiting ring 312. A third groove 314 is formed between the second limiting ring 311 and the third limiting ring 312. A first sealing ring 315 is embedded in the third groove 314 to prevent gas leakage at the connection and improve the sealing performance and reliability of the device. The output end 302 is connected to the second connecting pipe 4. The output end 302 is provided with a fourth groove 316. The second connecting pipe 4 is provided with a fourth limiting ring 317 that engages with the fourth groove 316. The outer wall of the output end 302 is provided with a fourth groove 316, and the end of the second connecting pipe 4 is provided with a fourth limiting ring 317 that engages with the fourth groove 316. The outer wall of the output end 302 is also provided with a fifth limiting ring 318 and a sixth limiting ring 319 in sequence. The inner wall of the second connecting pipe 4 is provided with a fifth groove 320 that engages with the fifth limiting ring 318 and the sixth limiting ring 319. A sixth groove 321 is formed between the fifth limiting ring 318 and the sixth limiting ring 319, and a second sealing ring 322 is embedded in the sixth groove 321. This prevents gas leakage at the connection point and improves the sealing and reliability of the device. The pressure relief end 303 is provided with a pressure relief hole 308, and a valve cover 10 is fitted onto the pressure relief end 303 to seal the pressure relief hole 308. If the pressure is abnormal during inflation, opening the valve cover 10 allows the gas in the airbag 5 to be quickly discharged through the pressure relief hole 308, ensuring patient safety in emergencies. The second connecting tube 4 is connected to an airbag 5 at one end. The second connecting tube 4 has graduations 9 to help doctors determine the insertion depth of the airbag 5 and avoid excessive insertion that could cause tissue damage. The airbag 5 is made of medical-grade silicone and is bonded to the second connecting tube 4. The valve core 6 has a handle 7 at its top. Rotating the handle 7 rotates the valve core 6, switching between ventilation and pressure relief functions. This allows for inflation (connecting the input end 301 and the output end 302, closing the pressure relief end 303), pressure maintenance (maintaining pressure in the airbag 5 by closing the connection between the channels), and pressure relief (connecting the output end 302 and the pressure relief end 303, closing the input end 301). This simplifies the operation for medical staff and shortens surgical preparation time.

[0031] The three-way valve 3 of this invention, through the cooperation of the valve core 6 and the handle 7, allows switching between inflation, pressure holding, and depressurization states simply by rotating the handle 7, eliminating the need for frequent operation of multiple independent valves, simplifying the operation steps for medical staff, and shortening surgical preparation time. Furthermore, this invention allows for single-person operation by medical staff, saving manpower. The pressure gauge 8 at the front end of the syringe 1 can display the pressure value inside the balloon 5 in real time, allowing doctors to intuitively grasp the degree of expansion and avoid affecting the surgery due to insufficient or excessive inflation. This invention also uses a second one-way valve 307 covering the second through hole 305 and the second sector groove 306 of the second retaining ring 304, allowing gas to flow only from the input end 301 to the output end 302, preventing gas in the balloon 5 from flowing back to the pressure pump, ensuring stable pressure during expansion, and avoiding a decrease in expansion efficiency due to gas backflow. The limiting ring, groove, and sealing ring design at the input end 301 and the output end 302 prevent gas leakage and improve the sealing and reliability of the device. The pressure relief end 303 of this utility model is also provided with a pressure relief hole 308 and a valve cover 10. If the pressure is abnormal during inflation, it can be quickly relieved through the valve cover 10 to ensure patient safety in an emergency. In addition, the scale line 9 on the second connecting tube 4 of this utility model can help doctors judge the insertion depth of the airbag 5 and avoid excessive insertion that could cause tissue damage.

[0032] Work process

[0033] According to the surgical requirements, place the airbag 5 in the appropriate position using the markings on the second connecting tube 4. Rotate the handle 7 to connect the vent groove 601 of the valve core 6 with the input end 301 and the output end 302 (the pressure relief end 303 is closed), as shown. Figure 8As shown, the piston rod 102 of the syringe 1 is pushed forward. At this time, the first valve 108 is pressed tightly against the first retaining ring 105 under the action of the air pressure inside the movable chamber 101, thereby closing the first sector groove 107 and closing the first one-way valve 104. The gas in the movable chamber 101 enters the input end 301 of the three-way valve 3 through the first connecting pipe 2. When the gas passes through the second through hole 305 and the second sector groove 306 of the second retaining ring 304, the second valve 323 disengages from the second retaining ring 304, the second sector groove 306 is vented, the second one-way valve 307 is opened, and the gas flows into the output end 302 and is filled into the air bag 5 through the second connecting pipe 4. Due to the one-way conduction of the first one-way valve 104, when the piston rod 102 is pulled back, the air pressure inside the movable chamber 101 is lower than the external air pressure. The external air pressure pushes the first valve 108 away from the first retaining ring 105, and gas enters the movable chamber 101 from the first sector groove 107. This allows for rapid and repeated inflation, expanding the retroperitoneal fascia tissue and creating a stable surgical operating space. The surgeon monitors the pressure of the balloon 5 in real time using the pressure gauge 8. Inflation is stopped when the pressure reaches the preset value and the fascia tissue is sufficiently expanded. Rotating the handle 7 connects one end of the venting groove 601 of the valve core 6 to the input end 301 and closes the other end, or connects one end of the venting groove 601 to the pressure relief end 303 and closes the other end. Figure 10 As shown, airbag 5 maintains pressure continuously. After inflation, rotating handle 7 connects vent 601 to output end 302 and depressurization end 303 (input end 301 is closed), as shown. Figure 11 As shown, when the valve cover 10 is opened, the gas in the airbag 5 is discharged through the pressure relief hole 308, the pressure drops rapidly, and then the airbag 5 is removed from the patient's body, completing the operation channel expansion.

[0034] In summary, this invention can monitor the airbag gas pressure in real time and prevent gas backflow inside the airbag. It can support single-person operation and does not require frequent switching of the three-way valve.

Claims

1. A fascia tissue expansion device for a retroperitoneal laparoscopic surgical operating channel, comprising a syringe (1), the syringe (1) having a movable cavity (101) inside, and a piston rod (102) slidably engaged within the movable cavity (101) at the rear end of the syringe (1); characterized in that: The syringe (1) has an air inlet (103) at its front end, and the air inlet (103) has a first one-way valve (104) that allows air to enter the movable chamber (101) in one direction. The syringe (1) is connected to a first connecting pipe (2), and the first connecting pipe (2) is connected to a three-way valve (3). The three-way valve (3) has an input end (301), an output end (302), and a pressure relief end (303). A valve core (6) is rotatably fitted inside the three-way valve (3), and the valve core (6) has a branch... A venting groove (601) is provided to cooperate with the input end (301), the output end (302) and the pressure relief end (303); the input end (301) is provided with a second one-way valve (307) for one-way air intake of the venting groove (601); the input end (301) is connected to the first connecting pipe (2); the output end (302) is connected to the second connecting pipe (4); the pressure relief end (303) is provided with a pressure relief hole (308); the end of the second connecting pipe (4) is connected to an airbag (5).

2. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The first one-way valve (104) includes a first retaining ring (105) connected to the inner wall of the air inlet (103). The first retaining ring (105) has a first through hole (106) at its center and a plurality of first sector grooves (107) arranged around the first through hole (106). The inner side of the first retaining ring (105) is provided with a first valve (108) fixed on the first through hole (106). The first valve (108) fits against the first retaining ring (105) to close the first sector grooves (107).

3. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The outer wall of the input end (301) is provided with a first groove (309), and the end of the first connecting pipe (2) is provided with a first limiting ring (310) that engages with the first groove (309); the outer wall of the input end (301) is also provided with a second limiting ring (311) and a third limiting ring (312) in sequence, and the inner wall of the first connecting pipe (2) is provided with a second groove (313) that engages with the second limiting ring (311) and the third limiting ring (312), and a third groove (314) is formed between the second limiting ring (311) and the third limiting ring (312), and a first sealing ring (315) is embedded in the third groove (314).

4. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The outer wall of the output end (302) is provided with a fourth groove (316), and the end of the second connecting pipe (4) is provided with a fourth limiting ring (317) that engages with the fourth groove (316); the outer wall of the output end (302) is also provided with a fifth limiting ring (318) and a sixth limiting ring (319) in sequence, and the inner wall of the second connecting pipe (4) is provided with a fifth groove (320) that engages with the fifth limiting ring (318) and the sixth limiting ring (319), and a sixth groove (321) is formed between the fifth limiting ring (318) and the sixth limiting ring (319), and a second sealing ring (322) is embedded in the sixth groove (321).

5. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The second one-way valve (307) includes a second retaining ring (304) connected to the inner wall of the input end (301). The second retaining ring (304) has a second through hole (305) at its center and a plurality of second sector grooves (306) arranged around the second through hole (305). The inner side of the second retaining ring (304) has a second valve (323) fixed on the second through hole (305). The second valve (323) fits against the second retaining ring (304) to close the second sector grooves (306).

6. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: A pressure gauge (8) is installed at the front end of the syringe (1).

7. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The valve core (6) has a handle (7) on top.

8. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The airbag (5) is made of medical-grade silicone material, and the airbag (5) and the second connecting tube (4) are bonded together.

9. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The pressure relief end (303) is fitted with a valve cover (10) that seals the pressure relief hole (308).

10. The fascia tissue expansion device for the retroperitoneal laparoscopic surgical operating channel according to claim 1, characterized in that: The second connecting tube (4) has scale lines (9).

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