Operation auxiliary instrument for peritoneal dialysis

Abstract

The surgical auxiliary instrument comprises a dialysis tube and a three-way valve communicated with one end of the dialysis tube, the three-way valve is communicated with a liquid inlet tube and a liquid outlet tube, the surgical auxiliary instrument further comprises a storage box with an opening in the top face, and a sealing film made of flexible materials is fixedly connected to the opening of the storage box. A piston plate is connected into the storage box in a sliding mode, the piston plate divides an inner containing cavity of the storage box into a liquid inlet cavity and a liquid outlet cavity containing dialysate, the liquid inlet pipe is communicated with the liquid outlet cavity, the liquid outlet pipe is communicated with the liquid inlet cavity, and a driving assembly used for driving the piston plate to move towards the liquid outlet cavity is installed on the storage box. The invention discloses a peritoneal dialysis operation assisting instrument, and aims to provide an operation assisting instrument for peritoneal dialysis to solve the problem that in the prior art, drainage of dialysate depends on gravity, and if the pressure of the abdominal cavity is insufficient, drainage is possibly unsmooth.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a surgical auxiliary device for peritoneal dialysis. Background Art

[0002] Peritoneal dialysis is a renal replacement therapy that uses the patient's own peritoneum as a semipermeable membrane to remove metabolic waste and excess water from the body by perfusing dialysate into the abdominal cavity.

[0003] Auxiliary equipment used for peritoneal dialysis mainly includes dialysis tube, dialysis fluid bag for containing dialysis fluid and dialysis connecting tube (including inlet tube and outlet tube).

[0004] A peritoneal dialysis catheter is used to establish a pathway between the peritoneal cavity and the external dialysate, allowing for the inflow and outflow of dialysate. Through a catheterization procedure, one end of the catheter is placed in the peritoneal cavity (usually near the pelvic cavity), while the other end is led out of the body through a subcutaneous tunnel and connected to the dialysis line.

[0005] The dialysate bag stores sterile dialysate and provides a medium for solute exchange and ultrafiltration. During the inflow phase, the dialysate bag is suspended high and gravity-fed into the peritoneal cavity through the inlet tube. During the dwell phase, the dialysate remains in the peritoneal cavity (usually for 4-6 hours), exchanging solutes (urea, creatinine, etc.) and water with the blood through the peritoneal capillaries. During the drainage phase, the waste bag is placed low, and gravity or negative pressure suction is used to drain the waste fluid through the outlet tube.

[0006] Since the drainage of dialysate relies on gravity, if the abdominal cavity pressure is insufficient, it may lead to poor drainage and affect the treatment effect. Summary of the Invention

[0007] In view of this, the object of the present invention is to provide a surgical auxiliary instrument for peritoneal dialysis to solve the problem in the prior art that the drainage of dialysate depends on gravity and insufficient abdominal pressure may lead to poor drainage.

[0008] The present invention is achieved through the following technical solutions:

[0009] A surgical auxiliary instrument for peritoneal dialysis, comprising a dialysis tube and a three-way valve connected to one end of the dialysis tube, the three-way valve being connected to a liquid inlet pipe and a liquid outlet pipe, and also comprising a storage box with an open top surface, a sealing membrane of a flexible material being fixedly connected to the opening of the storage box, a piston plate being slidably connected inside the storage box, the piston plate dividing the internal volume of the storage box into a liquid inlet chamber and a liquid outlet chamber containing dialysate, the liquid inlet pipe being connected to the liquid outlet chamber, the liquid outlet pipe being connected to the liquid inlet chamber, and a drive assembly for driving the piston plate to move toward the liquid outlet chamber is installed on the storage box.

[0010] Furthermore, the drive assembly includes a tension spring, and a first groove adapted to the tension spring is opened on the storage box. The tension spring is located in the first groove, and both ends of the tension spring are fixedly connected to the piston plate and the side wall of the first groove respectively.

[0011] Furthermore, a bellows is sleeved on the tension spring, and two ends of the bellows are fixedly connected to the piston plate and the bottom wall of the storage box respectively.

[0012] Furthermore, a guide rod is fixedly connected to the piston plate, and the guide rod extends along the length direction of the tension spring. A first through hole adapted to the guide rod is opened on the storage box, and the guide rod passes through the first through hole. A locking assembly is installed between the storage box and the guide rod.

[0013] Furthermore, the bottom of the storage box is fixedly connected to a bracket, and the locking assembly includes a sleeve fixedly connected to the bottom wall of the storage box, the sleeve is sleeved on the guide rod, a screw is passed through the side wall of the sleeve, and a threaded hole adapted to the screw is opened on the side wall of the sleeve, the screw passes through the threaded hole and is threadedly connected to the sleeve, and when the storage box and the guide rod are locked, one end of the screw is against the side wall of the guide rod.

[0014] Furthermore, one end of the screw rod away from the guide rod is fixedly connected to a handle.

[0015] Furthermore, a plurality of limiting holes are provided on the side wall of the guide rod, and the plurality of limiting holes extend along the length direction of the guide rod.

[0016] Furthermore, it also includes a mounting bracket, the bracket is slidably connected to the mounting bracket, a pin is slidably connected to the bracket, a second through hole adapted for the pin is opened on the mounting bracket, the bracket and the mounting bracket are in a locked state, and one end of the pin passes through the second through hole.

[0017] Furthermore, a linkage plate is slidably connected to the bracket, the linkage plate is located within the movable track of the guide rod, a pull rope is fixedly connected to the linkage plate, and the end of the pull rope away from the linkage plate is fixedly connected to the end of the latch close to the storage box.

[0018] Furthermore, two support rods are fixedly connected to the bracket, and the two support rods are located on both sides of the pin. Two rotating shafts are rotatably connected between the two support rods, and the two rotating shafts are located at one end of the two support rods away from the bracket. A channel for the pull rope to pass through is left between the two rotating shafts, and the pull rope passes through the channel.

[0019] The beneficial effects of the present invention are:

[0020] This surgical auxiliary instrument for peritoneal dialysis connects the outlet tube to the dialysis tube by controlling a three-way valve, and the inlet tube and the dialysis tube are in a closed state. The drive assembly pulls the piston plate toward the outlet cavity, pushing the dialysate through the outlet tube and the dialysis tube into the patient's peritoneal cavity. The inlet cavity between the piston plate and the sealing membrane forms a negative pressure environment. The dialysate stays in the peritoneal cavity and exchanges solutes and water with the blood through the peritoneal capillaries. After dialysis is completed, under the negative pressure environment of the inlet cavity between the piston plate and the sealing membrane, the waste liquid is discharged into the inlet cavity through the dialysis tube and the outlet tube. Compared with the existing technology, the flow rate of the dialysate is accelerated by the drive assembly during the inlet phase, and the negative pressure environment between the piston plate and the sealing membrane guides the outflow of the waste liquid during the drainage phase. The probability of poor drainage of the dialysis tube due to insufficient peritoneal pressure is reduced, and the flow rate of the dialysate is accelerated.

[0021] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a three-dimensional Figure 1 ;

[0023] Figure 2 It is a schematic diagram of the local structure of the present invention Figure 1 ;

[0024] Figure 3 The present invention is a three-dimensional Figure 2 ;

[0025] Figure 4 It is a schematic diagram of the local structure of the present invention Figure 2 ;

[0026] Figure 5 It is a schematic diagram of the local structure of the present invention Figure 3 ;

[0027] Figure 6 It is a structural schematic diagram of the locking assembly of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the mounting frame of the present invention;

[0029] Figure 8 For the present invention Figure 7 A partial enlarged view of point A in the middle;

[0030] Figure 9 Schematic diagram of the structure of the bracket of the present invention;

[0031] Figure 10 It is a structural schematic diagram of the sleeve of the present invention;

[0032] Figure 11 It is a structural schematic diagram of the storage box of the present invention.

[0033] In the picture:

[0034] 1. Dialysis tube; 2. Three-way valve; 3. Liquid inlet pipe; 4. Liquid outlet pipe; 5. Storage box; 6. Sealing membrane; 7. Piston plate; 8. Liquid inlet chamber; 9. Liquid outlet chamber; 10. Drive assembly; 11. Tension spring; 12. First groove; 13. Bellows; 14. Guide rod; 15. First through hole; 16. Locking assembly; 17. Bracket; 18. Sleeve; 19. Screw; 20. Threaded hole; 21. Handle; 22. Limit hole; 23. Mounting bracket; 24. Pin; 25. Second through hole; 26. Linkage plate; 27. Pull rope; 28. Support rod; 29. Rotating shaft; 30. Channel. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0039] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0040] See also Figure 1-11 The present invention provides a technical solution: a surgical auxiliary instrument for peritoneal dialysis, comprising a dialysis tube 1 and a three-way valve 2 connected to one end of the dialysis tube 1, the three-way valve 2 being connected to a liquid inlet pipe 3 and a liquid outlet pipe 4, and further comprising a storage box 5 with an opening on the top surface, the opening of the storage box 5 being fixedly connected to a sealing membrane 6 of a flexible material, a piston plate 7 being slidably connected inside the storage box 5, the piston plate 7 dividing the internal volume of the storage box 5 into a liquid inlet chamber 8 and a liquid outlet chamber 9 containing dialysate, the liquid inlet pipe 3 being connected to the liquid outlet chamber 9, the liquid outlet pipe 4 being connected to the liquid inlet chamber 8, and a driving component 10 for driving the piston plate 7 to move toward the liquid outlet chamber 9 is installed on the storage box 5.

[0041] Working principle and usage:

[0042] Step 1: Control the three-way valve 2 to connect the liquid outlet pipe 4 to the dialysis tube 1, and the liquid inlet pipe 3 and the dialysis tube 1 are in a closed state, as shown in FIG. Figure 1-2 shown.

[0043] Step 2: The driving assembly 10 pulls the piston plate 7 to move toward the liquid outlet cavity 9, pushing the dialysate into the patient's peritoneal cavity through the liquid outlet tube 4 and the dialysis tube 1. The liquid inlet cavity 8 between the piston plate 7 and the sealing membrane 6 forms a negative pressure environment, such as Figure 3-4 shown.

[0044] Step 3: The dialysate stays in the peritoneal cavity (usually 4-6 hours) and exchanges solutes (urea, creatinine, etc.) and water with the blood through the peritoneal capillaries.

[0045] Step 4: After dialysis is completed, under the negative pressure environment of the liquid inlet chamber 8 between the piston plate 7 and the sealing membrane 6, the waste liquid is discharged into the liquid inlet chamber 8 through the dialysis tube 1 and the liquid outlet tube 4.

[0046] Compared to existing technologies, the drive assembly 10 accelerates the flow of dialysate during the inlet phase, while the negative pressure between the piston plate 7 and the sealing membrane 6 guides the outflow of waste fluid during the drainage phase. This reduces the probability of poor drainage from the dialysis tube 1 due to insufficient peritoneal pressure and accelerates the flow of dialysate.

[0047] In this embodiment: the drive assembly 10 includes a tension spring 11, and a first groove 12 adapted to the tension spring 11 is opened on the storage box 5. The tension spring 11 is located in the first groove 12, and the two ends of the tension spring 11 are fixedly connected to the piston plate 7 and the side wall of the first groove 12 respectively.

[0048] In this solution, a first groove 12 adapted to the tension spring 11 is opened on the storage box 5 , the tension spring 11 is located in the first groove 12 , and both ends of the tension spring 11 are fixedly connected to the piston plate 7 and the side wall of the first groove 12 respectively.

[0049] When the tension spring 11 is in a stretched state, the piston plate 7 is located at the top of the storage box 5. During the return process of the tension spring 11, the piston plate 7 is pulled toward the liquid outlet chamber 9, generating pressure to push the dialysate into the liquid outlet tube 4. Furthermore, a negative pressure environment is formed in the liquid inlet chamber 8 between the piston plate 7 and the sealing membrane 6. After dialysis is completed, it can accelerate the discharge of waste liquid through the liquid outlet tube 4 into the liquid inlet chamber 8.

[0050] In this embodiment, a bellows 13 is sleeved on the tension spring 11 , and two ends of the bellows 13 are fixedly connected to the piston plate 7 and the bottom wall of the storage box 5 respectively.

[0051] In this solution, a bellows 13 is sleeved on the tension spring 11 , and both ends of the bellows 13 are fixedly connected to the piston plate 7 and the bottom wall of the storage box 5 , respectively.

[0052] The bellows 13 expands and contracts with the tension spring 11, isolating the tension spring 11 from the dialysate, reducing the probability of the dialysate being contaminated by the contact between the tension spring 11 and the dialysate. The bellows 13 also protects the tension spring 11 from being corroded by the dialysate, thereby extending the service life of the tension spring 11.

[0053] In this embodiment: a guide rod 14 is fixedly connected to the piston plate 7, and the guide rod 14 extends along the length direction of the tension spring 11. A first through hole 15 adapted to the guide rod 14 is opened on the storage box 5, and the guide rod 14 passes through the first through hole 15. A locking assembly 16 is installed between the storage box 5 and the guide rod 14.

[0054] In this solution: a guide rod 14 is fixedly connected to the piston plate 7, the guide rod 14 extends along the length direction of the tension spring 11, a first through hole 15 adapted to the guide rod 14 is opened on the storage box 5, the guide rod 14 passes through the first through hole 15, and a locking assembly 16 is installed between the storage box 5 and the guide rod 14.

[0055] The guide rod 14 moves linearly along the first through hole 15, enhancing the movement stability of the piston plate 7 and preventing deflection. The relative position of the storage box 5 and the guide rod 14 is fixed by the locking assembly 16, and the piston plate 7 stops moving, facilitating stable storage of the dialysate in the storage box 5.

[0056] In this embodiment: the bottom of the storage box 5 is fixedly connected to a bracket 17, and the locking assembly 16 includes a sleeve 18 fixedly connected to the bottom wall of the storage box 5, the sleeve 18 is sleeved on the guide rod 14, and a screw 19 is passed through the side wall of the sleeve 18, and a threaded hole 20 adapted to the screw 19 is opened on the side wall of the sleeve 18, and the screw 19 passes through the threaded hole 20 and is threadedly connected to the sleeve 18. When the storage box 5 and the guide rod 14 are locked, one end of the screw 19 is against the side wall of the guide rod 14.

[0057] In this solution, a bracket 17 is fixedly connected to the bottom of the storage box 5. The locking assembly 16 includes a sleeve 18 fixedly connected to the bottom wall of the storage box 5. The sleeve 18 is mounted on the guide rod 14. A screw 19 is inserted through the side wall of the sleeve 18. The side wall of the sleeve 18 has a threaded hole 20 that matches the screw 19. The screw 19 passes through the threaded hole 20 and is threadedly connected to the sleeve 18. When the storage box 5 is locked to the guide rod 14, one end of the screw 19 abuts against the side wall of the guide rod 14. The bottom of the storage box 5 is a hollow structure that tapers from top to bottom. The bracket 17 allows the storage box 5 to be placed stably on the ground.

[0058] Rotating screw 19 forces it against the sidewall of guide rod 14, securing piston plate 7 through friction. This fixes the relative position of storage box 5 and guide rod 14, and piston plate 7 stops moving, facilitating stable storage of dialysate within storage box 5. After screw 19 is released, piston plate 7, under the tension of tension spring 11, moves toward liquid outlet chamber 9, generating pressure that pushes dialysate into outlet tube 4. Furthermore, a negative pressure environment is created in liquid inlet chamber 8 between piston plate 7 and sealing membrane 6, accelerating the discharge of waste fluid through outlet tube 4 into liquid inlet chamber 8 after dialysis is completed.

[0059] In this embodiment, one end of the screw rod 19 away from the guide rod 14 is fixedly connected to a handle 21 .

[0060] In this solution, the handle 21 is fixedly connected to the end of the screw rod 19 away from the guide rod 14 .

[0061] The handle 21 amplifies the rotational torque, and the user can tighten or loosen the screw 19 without tools. This facilitates quick operation of the screw 19 and improves adjustment efficiency.

[0062] In this embodiment, a plurality of limiting holes 22 are formed on the side wall of the guide rod 14 , and the plurality of limiting holes 22 extend along the length direction of the guide rod 14 .

[0063] In this solution, a plurality of limiting holes 22 are formed on the side wall of the guide rod 14 , and the plurality of limiting holes 22 extend along the length direction of the guide rod 14 .

[0064] Inserting the ends of the screw rod 19 into different limiting holes 22 can more stably lock the moving distance of the guide rod 14. The piston plate 7 can be fixed in multiple gears to accurately control the dialysate output.

[0065] In this embodiment, a mounting bracket 23 is further included, the bracket 17 is slidably connected to the mounting bracket 23, a latch 24 is slidably connected to the bracket 17, a second through hole 25 adapted to the latch 24 is opened on the mounting bracket 23, the bracket 17 and the mounting bracket 23 are in a locked state, and one end of the latch 24 passes through the second through hole 25.

[0066] In this solution, the bracket 17 is slidably connected to the mounting frame 23, the bracket 17 is slidably connected to the latch 24, and a second through hole 25 adapted to the latch 24 is provided on the mounting frame 23. The second through hole 25 is located at the top of the mounting frame 23. The bracket 17 and the mounting frame 23 are in a locked state, and one end of the latch 24 passes through the second through hole 25.

[0067] When the latch 24 is inserted into the second through hole 25 of the mounting frame 23, the relative position of the bracket 17 and the mounting frame 23 is locked; after the latch 24 is pulled out, the bracket 17 can slide to the adjusted position under the action of gravity. First, fix the storage box 5 at the top of the mounting frame 23, such as Figure 1-2 As shown. The dialysate flows from the upper part of the mounting rack 23 to the patient's abdominal cavity. Under the action of gravity, the dialysate can be accelerated to flow from the storage box 5 to the patient's abdominal cavity. After the dialysis is completed, the storage box 5 is moved to the lower part of the mounting rack 23. Figure 3-4 The waste liquid flows from the patient's abdominal cavity to the lower part of the mounting frame 23 , and the speed at which the waste liquid flows from the patient's abdominal cavity to the storage box 5 can be accelerated by gravity.

[0068] In this embodiment: a linkage plate 26 is slidably connected to the bracket 17, and the linkage plate 26 is located within the movable track of the guide rod 14. A pull rope 27 is fixedly connected to the linkage plate 26, and the end of the pull rope 27 away from the linkage plate 26 is fixedly connected to the end of the latch 24 close to the storage box 5.

[0069] In this solution: a linkage plate 26 is slidably connected on the bracket 17, the linkage plate 26 is located within the movable track of the guide rod 14, a pull rope 27 is fixedly connected to the linkage plate 26, and the end of the pull rope 27 away from the linkage plate 26 is fixedly connected to the end of the latch 24 close to the storage box 5.

[0070] First, fix the storage box 5 at the height of the mounting frame 23, as shown in FIG. Figure 1-2As shown. Dialysate flows from the upper part of the mounting frame 23 to the patient's abdominal cavity. Gravity can accelerate the flow of dialysate from the storage box 5 to the patient's abdominal cavity. Guide rod 14, under the action of tension spring 11, pushes linkage plate 26 downward. During the downward movement of linkage plate 26, pulls pull rope 27 to make latch 24 exit second through hole 25. Storage box 5 moves to the lower part of mounting frame 23 under its own gravity. Figure 3-4 The waste liquid flows from the patient's abdominal cavity to the lower part of the mounting frame 23 , and the speed at which the waste liquid flows from the patient's abdominal cavity to the storage box 5 can be accelerated by gravity.

[0071] In this embodiment: two support rods 28 are fixedly connected to the bracket 17, and the two support rods 28 are located on both sides of the pin 24. Two rotating shafts 29 are rotatably connected between the two support rods 28. The two rotating shafts 29 are both located at the end of the two support rods 28 away from the bracket 17. A channel 30 for the pull rope 27 to pass through is reserved between the two rotating shafts 29, and the pull rope 27 passes through the channel 30.

[0072] In this solution: two support rods 28 are fixedly connected to the bracket 17, the two support rods 28 are located on both sides of the pin 24, two rotating shafts 29 are rotatably connected between the two support rods 28, and the two rotating shafts 29 are both located at one end of the two support rods 28 away from the bracket 17. There is a channel 30 between the two rotating shafts 29 for the pull rope 27 to pass through, and the pull rope 27 passes through the channel 30.

[0073] The pull rope 27 passes around the channel 30 between the two rotating shafts 29, changing the direction of the pulling force so that the vertical movement of the latch 24 is coordinated with the horizontal movement of the linkage plate 26. The transmission path of the pull rope 27 is optimized by the rotating shaft 29 and the support rod 28 to reduce friction loss.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A surgical auxiliary device for peritoneal dialysis, comprising a dialysis tube (1) and a three-way valve (2) connected to one end of the dialysis tube (1), wherein the three-way valve (2) is connected to a liquid inlet pipe (3) and a liquid outlet pipe (4), characterized in that: The invention also includes a storage box (5) with an open top surface, a sealing membrane (6) made of a flexible material fixedly connected to the opening of the storage box (5), a piston plate (7) slidably connected inside the storage box (5), the piston plate (7) dividing the internal volume of the storage box (5) into a liquid inlet chamber (8) and a liquid outlet chamber (9) containing dialysate, the liquid inlet pipe (3) being connected to the liquid outlet chamber (9), the liquid outlet pipe (4) being connected to the liquid inlet chamber (8), and a driving component (10) for driving the piston plate (7) to move toward the liquid outlet chamber (9).

2. The surgical auxiliary instrument for peritoneal dialysis according to claim 1, characterized in that: The driving assembly (10) includes a tension spring (11), and a first groove (12) adapted to the tension spring (11) is provided on the storage box (5). The tension spring (11) is located in the first groove (12), and the two ends of the tension spring (11) are fixedly connected to the piston plate (7) and the side wall of the first groove (12) respectively.

3. The surgical auxiliary instrument for peritoneal dialysis according to claim 2, characterized in that: A bellows (13) is sleeved on the tension spring (11), and two ends of the bellows (13) are fixedly connected to the piston plate (7) and the bottom wall of the storage box (5) respectively.

4. The surgical auxiliary instrument for peritoneal dialysis according to claim 2, characterized in that: A guide rod (14) is fixedly connected to the piston plate (7), and the guide rod (14) extends along the length direction of the tension spring (11). A first through hole (15) adapted to the guide rod (14) is provided on the storage box (5), and the guide rod (14) passes through the first through hole (15). A locking assembly (16) is installed between the storage box (5) and the guide rod (14).

5. The surgical auxiliary instrument for peritoneal dialysis according to claim 4, characterized in that: The bottom of the storage box (5) is fixedly connected to a bracket (17), and the locking assembly (16) includes a sleeve (18) fixedly connected to the bottom wall of the storage box (5), the sleeve (18) is sleeved on the guide rod (14), a screw (19) is passed through the side wall of the sleeve (18), and a threaded hole (20) adapted to the screw (19) is opened on the side wall of the sleeve (18), the screw (19) passes through the threaded hole (20) and is threadedly connected to the sleeve (18), and when the storage box (5) and the guide rod (14) are locked, one end of the screw (19) abuts against the side wall of the guide rod (14).

6. The surgical auxiliary instrument for peritoneal dialysis according to claim 5, characterized in that: One end of the screw rod (19) away from the guide rod (14) is fixedly connected to a handle (21).

7. The surgical auxiliary instrument for peritoneal dialysis according to claim 5, characterized in that: A plurality of limiting holes (22) are provided on the side wall of the guide rod (14), and the plurality of limiting holes (22) extend along the length direction of the guide rod (14).

8. The surgical auxiliary instrument for peritoneal dialysis according to claim 5, characterized in that: The invention also includes a mounting frame (23), wherein the bracket (17) is slidably connected to the mounting frame (23), a latch (24) is slidably connected to the bracket (17), and a second through hole (25) adapted to the latch (24) is provided on the mounting frame (23), and when the bracket (17) and the mounting frame (23) are in a locked state, one end of the latch (24) passes through the second through hole (25).

9. The surgical auxiliary instrument for peritoneal dialysis according to claim 8, characterized in that: A linkage plate (26) is slidably connected to the bracket (17), and the linkage plate (26) is located within the movable track of the guide rod (14). A pull rope (27) is fixedly connected to the linkage plate (26), and the end of the pull rope (27) away from the linkage plate (26) is fixedly connected to the end of the latch (24) close to the storage box (5).

10. The surgical auxiliary instrument for peritoneal dialysis according to claim 9, characterized in that: Two support rods (28) are fixedly connected to the bracket (17), and the two support rods (28) are located on both sides of the latch (24). Two rotating shafts (29) are rotatably connected between the two support rods (28), and the two rotating shafts (29) are both located at one end of the two support rods (28) away from the bracket (17). A channel (30) for the pull rope (27) to pass through is reserved between the two rotating shafts (29), and the pull rope (27) passes through the channel (30).

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