Bendable negative pressure ureter guiding sheath with novel water sealing cap

Abstract

The bendable negative pressure ureter guiding sheath comprises a sheath tube, a sheath opening ring is arranged at the head end of the sheath tube, the head of the sheath tube is of a snake bone structure, the tail end of the sheath tube is coaxially and fixedly connected with a tube seat, the side wall of the tube seat is communicated with a negative pressure suction tube, the negative pressure suction tube is provided with a pressure adjusting assembly, a lock catch is arranged at the tail end of the tube seat, and the water sealing cap is arranged at the tail end of the tube seat. The dilation tube penetrates through the sheath tube and the tube seat, the front end of the dilation tube extends out of the sheath tube and is of a conical structure with the diameter gradually increased, and the tail end of the dilation tube is provided with a dilation inlet and a guide wire penetrating inlet. According to the utility model, the entry resistance of an endoscope is reduced, the structural strength of the sheathing canal is improved, and the negative suction pressure is convenient to control.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a bendable negative pressure ureteral guide sheath with a novel water sealing cap. Background Art

[0002] The ureteral introducer sheath is a surgical instrument used in a procedure called "transurethral ureteroscopy", which is mainly used to treat urinary stones.

[0003] The head end of the ureteral guide sheath in the prior art is not bendable and does not have the function of negative pressure suction, resulting in low surgical efficiency and high safety risks. Utility Model Content

[0004] The utility model aims to provide a bendable negative pressure ureteral guide sheath with a novel water sealing cap, which reduces the entry resistance of the endoscope, improves the structural strength of the sheath tube, and facilitates the control of negative suction pressure.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] The utility model discloses a bendable negative pressure ureteral guide sheath with a novel water sealing cap, comprising a sheath tube, a sheath mouth ring is arranged at the head end of the sheath tube, the head of the sheath tube is a snake bone structure, the tail end of the sheath tube is coaxially fixedly connected to a tube seat, the side wall of the tube seat is connected to a negative pressure suction tube, the negative pressure suction tube is provided with a pressure regulating component, a lock buckle is arranged at the tail end of the tube seat, a water sealing cap is arranged at the tail end of the tube seat, an expansion tube is arranged through the sheath tube and the tube seat, the front end of the expansion tube extends outside the sheath tube, the front end of the expansion tube is a tapered structure with a gradually increasing diameter, the tail end of the expansion tube is provided with an expansion inlet, and the tail end of the expansion tube is provided with a guide wire insertion inlet;

[0007] The snake-bone structure includes a plurality of coaxially sleeved support rings, the support rings are in the shape of a truncated cone with a small head and a large tail, and the adjacent support rings partially cover each other. A connecting ring is provided between the adjacent support rings, and the connecting ring is made of an elastic material. The front and rear ends of the connecting rings are respectively fixedly connected to the tail end and the head end of the adjacent support rings;

[0008] The pressure regulating component includes a pressure relief port, which is arranged on the side wall of the negative pressure suction tube. A closing part is arranged outside the pressure relief port. The closing part is annular and rotatably sleeved on the outer periphery of the negative pressure suction tube. An adjusting port is arranged on the outer periphery of the closing part, and the adjusting port is adapted to the pressure relief port.

[0009] Preferably, a penetration hole is provided at the rear end of the water sealing cap.

[0010] Preferably, the sheath is made of soft material.

[0011] Preferably, the snake bone structure is 4 cm in length.

[0012] Preferably, the water sealing cap is made of polytetrafluoroethylene.

[0013] Preferably, a keel is provided on the inner wall of the sheath tube, the keel is spring-shaped, and the keel is made of stainless steel.

[0014] Preferably, the outer surfaces of the sheath tube and the dilation tube are coated with a hydrophilic coating.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model uses a large amount of polytetrafluoroethylene material, so that the endoscope can pass smoothly;

[0017] 2. The sheath tip of the utility model adopts a snake-bone design to ensure the bending amplitude and resilience as well as the supporting force during bending;

[0018] 3. The utility model adopts a pressure regulating component to control the negative pressure in the guide sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the utility model;

[0020] Figure 2 for Figure 1 A magnified view of the middle A area;

[0021] Figure 3 A cross-sectional view of the sheath head.

[0022] In the figure: 1-sheath, 2-negative pressure suction tube, 3-pressure regulating assembly, 31-closing part, 32-regulating port, 4-tube seat, 5-expansion inlet, 6-locking buckle, 7-guide wire insertion port, 8-conical structure, 9-expansion tube, 10-snake bone structure, 101-support ring, 102-connecting ring, 11-sheath mouth ring, 12-water sealing cap. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1-3 As shown, the utility model includes a sheath tube 1, a sheath ring 11 is provided at the head end of the sheath tube 1, the head of the sheath tube 1 is a snake bone structure 10, the tail end of the sheath tube 1 is coaxially fixedly connected to the tube seat 4, the side wall of the tube seat 4 is connected to the negative pressure suction tube 2, the negative pressure suction tube 2 is provided with a pressure regulating component 3, the tail end of the tube seat 4 is provided with a lock buckle 6, the tail end of the tube seat 4 is provided with a water sealing cap 12, the expansion tube 9 is penetrated and arranged in the sheath tube 1 and the tube seat 4, the front end of the expansion tube 9 extends to the outside of the sheath tube 1, the front end of the expansion tube 9 is a tapered structure 8 with a gradually increasing diameter, the tail end of the expansion tube 9 is provided with an expansion inlet 5, the tail end of the expansion tube 9 is provided with a guide wire insertion inlet 7, and the expansion tube 9 is made of polyethylene material;

[0025] The snake-bone structure 10 is 4 cm long and includes a plurality of coaxially sleeved support rings 101. The support rings 101 are truncated cone-shaped with a small head and a large tail. Adjacent support rings 101 partially cover each other. A connecting ring 102 is provided between adjacent support rings 101. The connecting ring 102 is made of elastic material. The front and rear ends of the connecting ring 102 are respectively fixedly connected to the tail end and the head end of the adjacent support ring 101.

[0026] The pressure regulating assembly 3 includes a pressure relief port, which is arranged on the side wall of the negative pressure suction tube 2. A closing portion 31 is arranged outside the pressure relief port. The closing portion 31 is annular and rotatably sleeved on the outer periphery of the negative pressure suction tube 2. An adjusting port 32 is arranged on the outer periphery of the closing portion 31, and the adjusting port 32 is adapted to the pressure relief port.

[0027] In order to facilitate the insertion of the guide wire, the water sealing cap 12 is made of polytetrafluoroethylene, and a penetration hole is provided at the rear end of the water sealing cap 12 .

[0028] In order to make the sheath tube 1 have good steering and supporting functions, the sheath tube 1 is made of soft material. The sheath tube 1 is made of a composite of nylon, Teflon and 304 stainless steel. A keel is provided on the inner wall of the sheath tube 1. The keel is spring-shaped and made of stainless steel material, similar to the PVC steel wire hose in the prior art.

[0029] The outer surfaces of the sheath tube 1 and the dilation tube 9 are coated with a hydrophilic coating, and the hydrophilic coating is made of polyvinyl pyrrolidone material.

[0030] During actual use, the negative pressure suction tube 2 allows the doctor to connect to the negative pressure platform during the operation to perform negative pressure suction, which helps to clear the field of vision and remove tissue fragments or blood; the pressure regulating component 3 adjusts the through area of ​​the regulating port 32 and the pressure relief port by rotating the sealing part, thereby controlling the negative pressure in the sheath 1; the guide wire insertion port 7 is the opening of the slender tube in the expansion tube 9, which can accommodate the guide wire through the entire component; the snake bone structure 10 realizes a bending function similar to a snake bone due to the interlocking design of multiple connecting rings 102, and maintains a closed structure through the connecting ring 102, thereby improving the structural strength of the front end of the sheath 1.

[0031] Before using the device, the lock buckle 6 can fix the sheath tube 1 and the dilation tube 9. After the sheath tube 1 is completely inserted into the ureter, the lock buckle 6 is released to pull out the dilation tube 9.

[0032] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A bendable negative pressure ureteral guide sheath with a novel water sealing cap (12), characterized in that: The invention comprises a sheath tube (1), wherein the head end of the sheath tube (1) is provided with a sheath opening ring (11), the head of the sheath tube (1) is a snake bone structure (10), the tail end of the sheath tube (1) is coaxially fixedly connected to a tube seat (4), the side wall of the tube seat (4) is connected to a negative pressure suction tube (2), the negative pressure suction tube (2) is provided with a pressure regulating component (3), the tail end of the tube seat (4) is provided with a lock buckle (6), the tail end of the tube seat (4) is provided with a water sealing cap (12), an expansion tube (9) is arranged through the sheath tube (1) and the tube seat (4), the front end of the expansion tube (9) extends outside the sheath tube (1), the front end of the expansion tube (9) is a tapered structure (8) with a gradually increasing diameter, the tail end of the expansion tube (9) is provided with an expansion inlet (5), and the tail end of the expansion tube (9) is provided with a guide wire insertion inlet (7); The snake-bone structure (10) comprises a plurality of coaxially sleeved support rings (101), the support rings (101) being in the shape of a truncated cone with a small head and a large tail, and adjacent support rings (101) partially covering each other, and a connecting ring (102) being provided between adjacent support rings (101), the connecting ring (102) being made of an elastic material, and the front end and the rear end of the connecting ring (102) being fixedly connected to the tail end and the head end of the adjacent support ring (101) respectively; The pressure regulating assembly (3) comprises a pressure relief port, the pressure relief port being arranged on the side wall of the negative pressure suction tube (2), a sealing portion (31) being arranged outside the pressure relief port, the sealing portion (31) being annular, the sealing portion (31) being rotatably sleeved on the outer periphery of the negative pressure suction tube (2), a regulating port (32) being arranged on the outer periphery of the sealing portion (31), and the regulating port (32) being adapted to the pressure relief port.

2. The ureteral guide sheath according to claim 1, characterized in that: The rear end of the water sealing cap (12) is provided with an entry hole.

3. The ureteral guide sheath according to claim 1, characterized in that: The sheath tube (1) is made of soft material.

4. The ureteral guide sheath according to claim 1, characterized in that: The snake bone structure (10) is 4 cm in length.

5. The ureteral guide sheath according to claim 1, characterized in that: The water sealing cap (12) is made of polytetrafluoroethylene.

6. The ureteral guide sheath according to claim 1, characterized in that: The inner wall of the sheath tube (1) is provided with a keel, which is in a spring shape and is made of stainless steel.

7. The ureteral guide sheath according to claim 1, characterized in that: The outer surfaces of the sheath tube (1) and the dilation tube (9) are both coated with a hydrophilic coating.

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