Ureter negative pressure calculus removal guide sheath

Abstract

The utility model relates to the technical field of medical instruments, in particular to a ureter negative pressure calculus removal guide sheath which comprises a sheath body, an operation channel is arranged in the sheath body, a gap is reserved between the inner side wall of the sheath body and the operation channel, supporting strips are integrally formed on the inner side wall of the sheath body, and a drainage channel is formed between every two adjacent supporting strips. A tip part is fixed at the front end of the sheath tube body, a drainage hole is formed in the side wall of the tip part and communicated with the drainage channel, and the inner diameter of the drainage hole is smaller than the minimum size of the section of the drainage channel. The inner diameter of the drainage hole is smaller than the minimum size of the section of the drainage channel, so that the drainage hole can block large stones, the situation that the drainage channel is blocked by large broken stones can be reduced, meanwhile, the supporting strip can support the flexible ureteroscope sheath, broken stone powder can be smoothly discharged, and the service life of the flexible ureteroscope sheath is prolonged. And the discharging efficiency of the broken stone powder is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a ureteral negative pressure stone removal guide sheath. Background Technology

[0002] The ureteral negative pressure lithotripsy guide sheath is a commonly used medical device in urology. It is used to create a surgical channel without the need for surgical instruments. During the operation, the sheath is inserted into the patient's bladder and ureter along the guide wire to reach the renal pelvis, thereby establishing a surgical channel. Then, an auxiliary endoscope and surgical instruments are inserted into the body through the surgical channel. The lithotripsy is performed under the action of lithotripsy equipment such as laser lithotripter. At this time, water is often injected to maintain a clear surgical field. The water and lithotripsy fragments injected into the body are suctioned out of the body through the drainage channel by a negative pressure device.

[0003] The drainage channel in the existing technology is the gap between the ureteroscope and the guide sheath. The drainage channel is relatively tortuous and narrow. If the size of the stone fragments entering the drainage channel is too large or the ureteroscope sheath is not placed properly, it is easy to cause blockage of the drainage channel, thereby affecting the stone fragment discharge efficiency. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0004] This invention provides a ureteral negative pressure stone removal guide sheath to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a ureteral negative pressure stone removal guide sheath, including a sheath body, a sheath connector connected to the tail end of the sheath body, a negative pressure connector provided on the sheath connector, the negative pressure connector being connected to the sheath body, a surgical channel provided inside the sheath body, a gap left between the inner wall of the sheath body and the surgical channel, and multiple support strips integrally formed along the axial direction on the inner wall of the sheath body, the multiple support strips being evenly distributed circumferentially within the gap, and a drainage channel being formed between two adjacent support strips.

[0006] The front end of the sheath tube is coaxially fixed with a tip that gradually decreases in outer diameter. The inner diameter of the tip is equal to the inner diameter of the surgical channel. A drainage hole corresponding to the drainage channel is opened on the side wall of the tip. The drainage hole is connected to the corresponding drainage channel. The inner diameter of the drainage hole is smaller than the minimum size of the drainage channel cross-section.

[0007] Preferably, there is a smooth transition between the outer wall of the sheath body and the outer wall of the tip.

[0008] Preferably, a negative pressure adjustment port is provided on the side wall of the negative pressure connector, and a sealing sleeve is slidably connected to the negative pressure connector.

[0009] Preferably, the outer side of the sheath tube is provided with graduations.

[0010] Preferably, the outer side of the sheath tube is provided with a hydrophilic coating.

[0011] Preferably, a sealing cap is provided on the outside of the sheath joint.

[0012] The beneficial effects of this utility model are as follows: (1) The inner diameter of the drainage hole of this utility model is smaller than the minimum size of the drainage channel cross section. In this way, the drainage hole can block large stones, thereby reducing the situation where large stones block the drainage channel. At the same time, the support strip can support the ureteroscope sheath, so that the ureteroscope sheath can be placed in place, thereby ensuring that the stone powder is discharged smoothly and improving the discharge efficiency of the stone powder; (2) The opening size of the negative pressure regulating port can be adjusted by sliding the sealing sleeve, so as to adjust the pressure inside the sheath tube; (3) Since the outer wall of the sheath tube body and the outer wall of the tip are smoothly transitioned, the damage of the sheath tube body to the urethral sphincter and ureter can be reduced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0015] Figure 3 This is a schematic diagram of the internal structure of the sheath tube body of this utility model;

[0016] Figure 4 This is a schematic diagram of the tip of the present invention.

[0017] Reference numerals: 1. Sheath body, 2. Sheath connector, 3. Negative pressure connector, 4. Surgical channel, 5. Support bar, 6. Drainage channel, 7. Tip, 8. Drainage hole, 9. Negative pressure adjustment port, 10. Sealing sleeve, 11. Scale, 12. Sealing cap. Detailed Implementation

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] like Figure 1-4As shown, this utility model provides a ureteral negative pressure stone removal guide sheath, including a sheath body 1, a sheath connector 2 connected to the tail end of the sheath body 1, a negative pressure connector 3 provided on the sheath connector 2, the negative pressure connector 3 being connected to the sheath body 1, a surgical channel 4 provided inside the sheath body 1, a gap between the inner wall of the sheath body 1 and the surgical channel 4, multiple support strips 5 integrally formed along the axial direction on the inner wall of the sheath body 1, the multiple support strips 5 being evenly distributed circumferentially within the gap, and a drainage channel 6 being formed between two adjacent support strips 5; a gradually decreasing outer diameter tip 7 is coaxially fixed at the front end of the sheath body 1, the inner diameter of the tip 7 being equal to the inner diameter of the surgical channel 4, a drainage hole 8 corresponding to the drainage channel 6 being opened on the side wall of the tip 7, the drainage hole 8 being connected to the corresponding drainage channel 6, and the inner diameter of the drainage hole 8 being smaller than the minimum cross-sectional size of the drainage channel 6.

[0020] Specifically, during use, after the guide sheath is placed in position, the ureteroscope and surgical instruments are inserted into the body along the surgical channel 4, and the negative pressure connector 3 is connected to the negative pressure device. Then, flushing water is injected through the ureteroscope, and the lithotripter can then perform lithotripsy. At this time, the negative pressure device is activated, and blood, pus, and lithotripsy powder are attracted by the negative pressure and discharged from the body through the drain hole 8 and drain channel 6 in sequence. Since the inner diameter of the drain hole 8 is smaller than the minimum cross-sectional size of the drain channel 6, the drain hole 8 can block large stones, thereby reducing the possibility of large stones blocking the drain channel 6. At the same time, the support bar 5 can support the ureteroscope sheath to facilitate its placement, thereby ensuring the smooth discharge of lithotripsy powder and improving the discharge efficiency of lithotripsy powder.

[0021] In some embodiments, the outer wall of the sheath body 1 and the outer wall of the tip 7 are smoothly transitioned, thereby reducing damage to the urethral sphincter and ureter caused by the sheath body 1.

[0022] In some embodiments, a negative pressure regulating port 9 is provided on the side wall of the negative pressure connector 3, and a sealing sleeve 10 is slidably connected to the negative pressure connector 3. Specifically, in use, the opening size of the negative pressure regulating port 9 can be adjusted by sliding the sealing sleeve 10, so as to adjust the pressure inside the sheath tube 1.

[0023] In some embodiments, the outer side of the sheath body 1 is provided with a scale 11, which facilitates clinical confirmation of the insertion depth of the sheath body 1.

[0024] In some embodiments, a hydrophilic coating is provided on the outer side of the sheath body 1. By providing the hydrophilic coating, the friction on the surface of the sheath body 1 can be effectively reduced, thereby further reducing the damage of the sheath body 1 to the urethral sphincter and ureter.

[0025] In some embodiments, a sealing cap 12 is provided on the outside of the sheath connector 2. By providing the sealing cap 12, the opening of the sheath connector 2 can be sealed to prevent foreign objects from entering the sheath body 1.

[0026] The above embodiments can be combined with each other.

[0027] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A ureteral negative pressure lithotripsy guide sheath, comprising a sheath body, a sheath connector connected to the tail end of the sheath body, a negative pressure connector provided on the sheath connector, the negative pressure connector being connected to the sheath body, characterized in that: The sheath has a surgical channel inside, and there is a gap between the inner wall of the sheath and the surgical channel. Multiple support strips are integrally formed along the axial direction on the inner wall of the sheath. The multiple support strips are evenly distributed circumferentially within the gap, and a drainage channel is formed between two adjacent support strips. The front end of the sheath tube is coaxially fixed with a tip that gradually decreases in outer diameter. The inner diameter of the tip is equal to the inner diameter of the surgical channel. A drainage hole corresponding to the drainage channel is opened on the side wall of the tip. The drainage hole is connected to the corresponding drainage channel. The inner diameter of the drainage hole is smaller than the minimum size of the drainage channel cross-section.

2. The ureteral negative pressure lithotripsy guide sheath according to claim 1, characterized in that: The outer wall of the sheath body and the outer wall of the tip are smoothly transitioned.

3. The ureteral negative pressure lithotripsy guide sheath according to claim 1, characterized in that: The negative pressure connector has a negative pressure adjustment port on its side wall, and a sealing sleeve is slidably connected to the negative pressure connector.

4. The ureteral negative pressure stone removal guide sheath according to claim 1, characterized in that: The outer side of the sheath tube is marked with graduations.

5. The ureteral negative pressure lithotripsy guide sheath according to claim 1, characterized in that: The outer side of the sheath tube is coated with a hydrophilic coating.

6. The ureteral negative pressure lithotripsy guide sheath according to claim 1, characterized in that: The outer side of the sheath joint is provided with a sealing cap.

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