Ureter circulating water negative pressure guide sheath

Abstract

The utility model relates to a ureter circulating water negative pressure guide sheath which comprises a sheath tube, the rear end of the sheath tube is connected with an instrument connector, the rear portion of the sheath tube is connected with a negative pressure suction connector in a Y shape, and a plurality of liquid injection tubes distributed in the axial direction are arranged on the inner wall of the sheath tube. The continuous and stable circulation of the injected liquid flow can be kept; axial grooves are formed in the positions, on the inner wall of the sheath tube, of the adjacent liquid injection tubes. The groove is used for forming a stable liquid negative pressure backflow channel; according to the urinary stone extractor, the problem that related surgical instruments such as an endoscope and the like possibly cause irregular blockage of the channel in the circular channel is avoided, meanwhile, bubbles or air cavities in the sheathing canal, intermittent weakening of negative pressure suction force and difficulty in urinary stone suction operation are avoided, the image definition of the endoscope is kept, and the surgical accuracy and the surgical efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a ureteral circulating water negative pressure guide sheath. Background Art

[0002] Ureteral negative pressure guide sheath is mainly used in urology and urinary stone surgery in clinical practice to provide a channel for endoscopes and other related surgical instruments.

[0003] Ureteral sheaths with liquid perfusion function are the most widely used. At present, the liquid injection and negative pressure suction channels of the existing guide sheaths mainly use a common sheath channel, which has the following disadvantages:

[0004] The shared channel for liquid injection and negative pressure suction will lead to unstable and discontinuous liquid flow, and the urinary stone suction operation will not be smooth and continuous. The sheath is a circular channel. The endoscope, stones, etc. may cause irregular blockage of the channel in this circular channel, resulting in air bubbles or air cavities in the sheath, intermittent weakening of the negative pressure suction force, and difficulty in urinary stone suction operation. It will also affect the image clarity of the endoscope, affecting the surgical effect and efficiency.

[0005] The additional perfusion channel on the sheath is set on the outer wall of the sheath, which will increase the overall outer diameter of the sheath, reduce the adaptability of the sheath to human cavities such as the ureter, and increase the difficulty and risk of the operation. Utility Model Content

[0006] In order to overcome the deficiencies in the background technology, the utility model aims to provide a ureteral circulating water negative pressure guide sheath.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a ureteral circulating water negative pressure guide sheath, including a sheath tube, the rear end of the sheath tube is connected to an instrument interface, and the rear part is also connected to a negative pressure suction interface in a Y shape, and a plurality of axially arranged injection tubes are provided on the inner wall of the sheath tube, and adjacent injection tubes are formed with axial grooves on the inner wall of the sheath tube, and the rear part of the sheath tube is connected to an injection interface in a Y shape that is connected to the injection tube.

[0008] Furthermore, the rear end of the injection tube is connected with an annular communication cavity, and the annular communication cavity is connected with the injection interface. Liquid can be injected into multiple injection tubes at the same time through the injection interface to maintain the continuity and stability of the liquid flow.

[0009] Furthermore, the injection tubes are three or more parallel to each other and are evenly arranged along the inner wall of the sheath tube. Adjacent injection tubes are formed with axial grooves on the inner wall of the sheath tube, which are used to form a stable liquid negative pressure reflux channel to avoid blockage of the reflux channel of the sheath tube.

[0010] Furthermore, the cross section of the injection tube is olive-shaped, which occupies less space in the sheath and minimizes the impact on the operation of surgical instruments in the sheath.

[0011] Furthermore, the sheath tube and the injection tube are integrally formed, which is convenient for industrial production.

[0012] The beneficial effects of the utility model are as follows: a plurality of injection tubes arranged along the axial direction are provided on the inner wall of the sheath tube of the utility model, which can maintain the continuity and stability of the injected liquid flow; adjacent injection tubes form axial grooves on the inner wall of the sheath tube; the grooves are used to form a stable liquid negative pressure reflux channel; a non-circular channel is formed in the sheath tube, which solves the technical problem of irregular blockage of the sheath tube channel caused by the endoscope, stones, etc. in the circular channel during the operation, and at the same time avoids the occurrence of bubbles or air cavities in the sheath tube, intermittent weakening of the negative pressure suction force and difficulty in the suction operation of urinary stones, and maintains the image clarity of the endoscope. The utility model can improve the accuracy and efficiency of the operation.

[0013] The utility model has a reasonable structural design and is easy to operate. It solves the technical problem that the circular channel of the guide sheath is prone to blockage. The injection tube and the negative pressure suction interface form a continuous and stable liquid flow circulation in the sheath tube, achieving the technical effect of smooth drainage of surgical irrigation fluid, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the sheath tube of the utility model.

[0016] Figure numerals: 1-sheath; 2-instrument interface; 3-negative pressure suction interface; 4-injection tube; 40-annular connecting cavity; 5-injection interface. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front end", "rear end", "left", "right", "rear", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0018] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Reference Figure 1-2 A ureteral circulating water negative pressure guide sheath comprises a sheath tube (1), the rear end of the sheath tube 1 is connected to an instrument interface 2, and the rear part is also connected to a negative pressure suction interface 3 in a Y shape, a plurality of injection tubes 4 arranged along the axial direction are provided on the inner wall of the sheath tube 1, adjacent injection tubes 4 are formed with axial grooves on the inner wall of the sheath tube 1, and the rear part of the sheath tube 1 is connected to an injection interface 5 in a Y shape and communicated with the injection tubes 4.

[0020] In this embodiment, the rear end of the injection tube 4 is connected to an annular communication cavity 40, and the annular communication cavity 40 is connected to the injection interface 5. Liquid can be injected into multiple injection tubes 4 at the same time through the injection interface 5 to maintain the continuity and stability of the liquid flow.

[0021] In this embodiment, the injection tubes 4 are three or more parallel to each other and are evenly arranged along the inner wall of the sheath tube 1. Adjacent injection tubes 4 are formed with axial grooves on the inner wall of the sheath tube 1, and the grooves are used to form a stable liquid negative pressure reflux channel to avoid blockage of the reflux channel of the sheath tube 1.

[0022] The cross section of the injection tube 4 is olive-shaped, which occupies less space in the sheath tube 1 and minimizes the impact on the operation of surgical instruments in the sheath tube 1.

[0023] The sheath tube 1 and the injection tube 4 are integrally formed, which is convenient for industrial production.

[0024] Implementation process: The negative pressure suction interface 3 at the rear of the sheath 1 is connected to the negative pressure suction device, and the injection interface 5 is connected to the perfusion device. The negative pressure suction device and the perfusion device are turned on, and physiological saline is injected along the front end of the injection tube 4.

[0025] An endoscope and other auxiliary instruments are introduced through the instrument interface 2 at the rear end of the sheath 1, and the tapered portion of the front end of the sheath 1 is pushed to reach the stone under endoscopic visualization; the lithotripsy optical fiber enters the renal pelvis along the channel of the sheath 1 to crush the target stone; the lithotripsy optical fiber withdraws to the instrument interface 2 at the rear end of the sheath 1, and the crushed stones are sucked out by the negative pressure formed by the negative pressure suction interface 3.

[0026] An axial groove is formed on the inner wall of the sheath tube 1 of the injection tube 4 adjacent to the guide sheath, and the groove is used to form a stable liquid negative pressure reflux channel; a non-circular channel is formed in the sheath tube 1, which avoids irregular blockage of the sheath tube 1 due to stones, endoscopes, etc. in the circular channel during surgery, and at the same time avoids the appearance of bubbles or air cavities in the sheath tube 1, intermittent weakening of the negative pressure suction force and difficulty in urinary stone suction operation, and can continuously maintain the image clarity of the endoscope. The utility model can improve the surgical effect and efficiency.

Claims

1. A ureteral circulating water negative pressure guide sheath, comprising a sheath tube (1), the rear end of the sheath tube (1) is connected to an instrument interface (2), and the rear part is also connected to a negative pressure suction interface (3) in a Y shape, characterized in that: The inner wall of the sheath tube (1) is provided with a plurality of injection tubes (4) arranged along the axial direction, adjacent injection tubes (4) are provided with axial grooves on the inner wall of the sheath tube (1), and the rear part of the sheath tube (1) is connected in a Y-shape with an injection interface (5) in communication with the injection tubes (4).

2. A ureteral circulating water negative pressure guide sheath according to claim 1, characterized in that: The rear end of the liquid injection tube (4) is connected to an annular communication cavity (40), and the annular communication cavity (40) is connected to the liquid injection port (5).

3. A ureteral circulating water negative pressure guide sheath according to claim 2, characterized in that: The injection tubes (4) are three or more parallel to each other and are evenly arranged along the inner wall of the sheath tube (1).

4. A ureteral circulating water negative pressure guide sheath according to any one of claims 1 to 3, characterized in that: The cross section of the liquid injection tube (4) is olive-shaped.

5. A ureteral circulating water negative pressure guide sheath according to any one of claims 1 to 3, characterized in that: The sheath tube (1) and the injection tube (4) are integrally formed.

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