Ureter guiding sheath
By setting a negative pressure and pressure relief mechanism in the ureteral guide sheath, the problem of difficulty in controlling perfusion and attraction pressure balance in renal lithotripsy surgery is solved, and the fine adjustment of intrarenal pressure and the maintenance of suction and perfusion pressure balance is achieved, which improves the safety and effectiveness of the surgery.
Patent Information
- Application Number
- CN202421045718.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In renal lithotripsy surgery, it is difficult to control the balance of perfusion and attraction pressure in the ureteral guide sheath, resulting in an increase in renal pressure, which is inconvenient to operate and easily disrupts the balance.
A ureteral guide sheath is designed, including a guide sheath body, a guide sheath joint and a dilator. The guide sheath joint is equipped with a negative pressure mechanism and a pressure relief mechanism. The negative pressure mechanism is used to quickly attract gravel. The pressure relief mechanism achieves fine adjustment of intra-renal pressure through components such as silicone valves, springs and push rods.
The fine-tuning of the intra-renal pressure during laser gravel is achieved, and the balance between attraction and perfusion pressure is maintained, which improves the safety and effectiveness of renal gravel surgery.
Smart Images
Figure CN222955792U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments, and particularly relates to a ureteral guiding sheath. Background Art
[0002] A ureteral guiding sheath is a medical device mainly used in urological surgery. During the operation, a clinician can manipulate and insert the sheath tube of the ureteral guiding sheath into the urinary tract of a patient to create a surgical channel, so as to assist an endoscope and other instruments to enter the urinary tract through the hollow surgical channel of the sheath tube, providing a continuous operation channel for them.
[0003] During renal lithotripsy (RIRS), usually after laser lithotripsy, a stone retrieval basket is used to remove the broken stones. Later, it developed to add a connector to the ureteral guiding sheath, and the connector is connected to a negative pressure mechanism. Under the action of negative pressure, the laser - broken stones in the renal pelvis are sucked out. During the lithotripsy process of the ureteral guiding sheath, under the condition of maintaining a certain amount of perfusion and suction, in a rational state, perfusion and suction should reach balance. However, in practice, it is very difficult to control the balance between the two. During the operation, when the renal internal pressure increases, increasing suction or reducing perfusion pressure requires the operation of a third person, which is very inconvenient and will disrupt the nearly balanced suction and perfusion pressure. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the above - mentioned technical problems and provide a ureteral guiding sheath.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a ureteral guiding sheath, which includes a guiding sheath main body, a guiding sheath connector and a dilator. One end of the guiding sheath connector is connected to the guiding sheath main body, and the other end is connected to the dilator. The guiding sheath connector includes a main pipe, a first sub - pipe and a second sub - pipe. A negative pressure mechanism is arranged on the first sub - pipe, and a pressure relief mechanism is arranged in the second sub - pipe. Both the negative pressure mechanism and the pressure relief mechanism are communicated with the guiding sheath main body. The pressure relief mechanism includes a silica gel valve, a spring, a fixing part and a connecting part. The fixing part is fixedly arranged in the second sub - pipe, the silica gel valve is connected to the fixing part, one end of the spring is connected to the connecting part, and the other end is connected to the fixing part.
[0006] Further, a pre - cut hole is penetrated through the middle of the silica gel valve.
[0007] Further, the connecting part includes a push rod and a push block. The push block is arranged on the push rod and drives the push rod to open and close the pre - cut hole.
[0008] Further, a pressure relief channel is penetrated through the middle of the push rod, and the pressure relief channel can be communicated with the guiding sheath main body through the pre - cut hole.
[0009] Further, a limiting hole is provided on the fixing member, and the limiting hole is coaxially arranged with the pre-cut hole and the pressure relief channel.
[0010] Further, a moving groove for the push block to move is formed on the second auxiliary tube.
[0011] Further, a hydrophilic coating is provided on the outer wall surface of the guiding sheath body.
[0012] Further, the first auxiliary tube and the second auxiliary tube are located on opposite sides of the main tube.
[0013] Further, the negative pressure mechanism includes a negative pressure suction port and a control switch. The negative pressure suction port is arranged on the first auxiliary tube, and the control switch controls the opening and closing of the negative pressure suction port.
[0014] As can be seen from the above description of the present invention, compared with the prior art, the advantages of a ureteral guiding sheath provided by the present invention are as follows: negative pressure mechanisms and pressure relief mechanisms are respectively arranged in the first auxiliary tube and the second auxiliary tube of the present invention. The negative pressure mechanism can quickly suck the crushed stones into the ureteral guiding sheath and thus discharge them out of the body. At the same time, during the laser lithotripsy process, the pressure relief mechanism can be opened and closed to finely adjust the pressure in the kidney, maintain the balance between the suction and perfusion pressures, and perform the kidney lithotripsy operation more safely and effectively. Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of the ureteral guiding sheath of the present invention. Detailed Embodiments
[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0017] Refer to Figure 1As shown in the figure, a ureteral guiding sheath includes a guiding sheath main body 1, a guiding sheath connector, and a dilator 3. One end of the guiding sheath connector is connected to the guiding sheath main body 1, and the other end is connected to the dilator 3. The guiding sheath connector includes a main tube 21, a first sub-tube 22, and a second sub-tube 23. The first sub-tube 22 and the second sub-tube 23 are located on opposite sides of the main tube 21. A negative pressure mechanism is provided on the first sub-tube 22, and a pressure relief mechanism is provided in the second sub-tube 23. Both the negative pressure mechanism and the pressure relief mechanism are communicated with the guiding sheath main body 1. The pressure relief mechanism includes a silica gel valve 41, a spring 42, a fixing member 43, and a connecting member 44. The fixing member 43 is fixedly arranged in the second sub-tube 23. The silica gel valve 41 is connected to the fixing member 43. One end of the spring 42 is connected to the connecting member 44, and the other end is connected to the fixing member 43. By providing a mutually communicated negative pressure mechanism and a pressure relief mechanism on the guiding sheath main body 1, the negative pressure mechanism can quickly suck the crushed stones into the ureteral guiding sheath and then discharge them out of the body. At the same time, during the laser lithotripsy process, the pressure relief mechanism can be opened and closed to finely adjust the pressure in the kidney, maintaining the balance between the suction and perfusion pressures, and performing the kidney lithotripsy operation more safely and effectively.
[0018] A pre-cut hole is provided through the middle of the silica gel valve 41. The connecting member 44 includes a push rod 441 and a push block 442. The push block 442 is arranged on the push rod 441 to drive the push rod 441 to open and close the pre-cut hole. A pressure relief channel 443 is provided through the middle of the push rod 441. The pressure relief channel 443 can be communicated with the guiding sheath main body 1 through the pre-cut hole. A limiting hole is provided on the fixing member 43. The limiting hole is coaxially arranged with the pre-cut hole and the pressure relief channel 443. A moving groove 231 for the movement of the push block 442 is provided on the second sub-tube 23. During use, pushing the push block 442 drives the push rod 441 to open the pre-cut hole, enabling the pressure relief channel 443 to be communicated with the inside of the guiding sheath main body 1, playing a role in pressure relief and realizing the fine adjustment of the pressure in the kidney, maintaining the balance between the suction and perfusion pressures. On the contrary, releasing the push block 442, the spring 42 drives the push block 442 to reset, causing the push rod 441 to move away from the pre-cut hole and the pre-cut hole to close.
[0019] The outer wall surface of the guiding sheath main body 1 is provided with a hydrophilic coating to facilitate the smooth insertion of the guiding sheath main body 1 into the patient's renal pelvis, improving the safety and success rate of the operation.
[0020] The negative pressure mechanism includes a negative pressure suction port 5 and a control switch 6. The negative pressure suction port 5 is provided on the first sub-tube 22. The control switch 6 controls the opening and closing of the negative pressure suction port 5. The control switch 6 is used to control the opening and closing of the negative pressure control port. When the negative pressure control port is closed, the stones can be sucked out under the negative pressure. When the negative pressure control port is opened, air is inhaled into the guiding sheath 1 from the negative pressure control port, and there is no negative pressure effect on the guiding sheath in the renal pelvis, facilitating the laser lithotripsy operation.
[0021] The above are only several specific embodiments of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantive modification made to the present utility model using this concept shall fall within the scope of infringement of the protection scope of the present utility model.
Claims
1. A ureteral guide sheath, characterized in that: The invention comprises a guide sheath body, a guide sheath joint and a dilator, wherein one end of the guide sheath joint is connected to the guide sheath body, and the other end is connected to the dilator. The guide sheath joint comprises a main pipe, a first sub-pipe and a second sub-pipe. A negative pressure mechanism is arranged on the first sub-pipe, and a pressure relief mechanism is arranged in the second sub-pipe. Both the negative pressure mechanism and the pressure relief mechanism are connected to the guide sheath body. The pressure relief mechanism comprises a silicone valve, a spring, a fixing part and a connecting part. The fixing part is fixedly arranged in the second sub-pipe, the silicone valve is connected to the fixing part, one end of the spring is connected to the connecting part, and the other end is connected to the fixing part.
2. A ureteral guide sheath according to claim 1, characterized in that: A pre-cut hole is arranged through the middle of the silicone valve.
3. A ureteral guide sheath according to claim 2, characterized in that: The connecting member comprises a push rod and a push block, wherein the push block is arranged on the push rod and drives the push rod to open and close the pre-cut hole.
4. A ureteral guide sheath according to claim 3, characterized in that: A pressure relief channel is provided through the middle of the push rod, and the pressure relief channel can be communicated with the guide sheath body through a pre-cut hole.
5. A ureteral guide sheath according to claim 4, characterized in that: The fixing member is provided with a limiting hole, and the limiting hole is coaxially arranged with the pre-cut hole and the pressure relief channel.
6. A ureteral guide sheath according to claim 3, characterized in that: The second auxiliary pipe is provided with a moving groove for the push block to move.
7. A ureteral guide sheath according to claim 1, characterized in that: The outer wall surface of the guide sheath body is provided with a hydrophilic coating.
8. The ureteral guide sheath according to claim 1, characterized in that: The first sub-pipe and the second sub-pipe are located at opposite sides of the main pipe.
9. The ureteral guide sheath according to claim 1, characterized in that: The negative pressure mechanism comprises a negative pressure suction port and a control switch. The negative pressure suction port is arranged on the first auxiliary pipe, and the control switch controls the opening and closing of the negative pressure suction port.