Negative pressure suction sheath kit for ureter
The design of the three-piece ureteral negative pressure suction sheath kit, which combines a rigid first inner core and a soft second inner core, solves the problem of difficulty in placing the outer sheath in the ureter in the existing technology, improves the convenience and controllability of the operation, and ensures the smooth progress of the surgery.
Patent Information
- Application Number
- CN202422828501.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-20
AI Technical Summary
Existing flexible ureteroscope sheaths are easily obstructed when advancing within the tortuous and narrow ureter, and it is difficult to ensure that the outer sheath is placed in place, making the operation inconvenient.
The ureteral negative pressure suction sheath kit adopts a three-piece structure, including an outer sheath, a first inner core, and a second inner core. The rigid first inner core is used to improve the structural strength of the outer sheath. It is inserted into the bladder under direct vision with a flexible ureteroscope, and then the outer sheath is inserted into the ureter along the guide wire through the soft second inner core to ensure proper placement.
This allows for accurate placement of the outer sheath, improving the convenience and controllability of the operation and ensuring the smooth progress of the surgery.
Smart Images
Figure CN223640692U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to medical devices, and more particularly, to a ureter negative pressure suction sheath kit. BACKGROUND
[0002] In recent years, with the popularization and development of endoscopic technology and the deepening of the minimally invasive concept, ureteroscopy technology has become a very important diagnostic and treatment method in clinical urology. Currently, ureteroscopy lithotripsy mainly uses ureteroscopy to enter the ureter and renal pelvis through the urethra, and then the stones are crushed by the soft mirror and the fragments are sucked out through the negative pressure suction channel. It has the advantages of minimally invasive, safety, less pain, quick recovery, and direct observation and stone crushing.
[0003] During the operation, the negative pressure suction ureteroscopy sheath is an essential auxiliary instrument, which provides an access channel for ureteroscopy surgery through the urethra and ureteral duct. The existing ureteroscopy sheath is a two-piece type, including an outer sheath and an inner core. During use, the inner core is inserted into the outer sheath, and under the guidance of the guide wire, the outer sheath together with the inner core is placed into the ureter, and then the inner core is pulled out. The outer sheath is used as an operating channel, and the ureteroscopy is inserted into the outer sheath to enter the renal pelvis for surgical operation. Since the pipe bodies of the outer sheath and the inner core are made of materials with certain bending elasticity, such as plastic materials, it is difficult to push and control in the tortuous and narrow ureter, and only relying on the guide wire to guide the sheath into the sheath cannot ensure that the outer sheath is placed in place. CONTENT OF THE UTILITY MODEL
[0004] The technical problem to be solved by the present application is to provide a ureter negative pressure suction sheath kit that can be placed in place and is easy to operate, in view of the above-mentioned defects of the prior art.
[0005] The technical solution adopted by the present application to solve the technical problem is: a ureter negative pressure suction sheath kit is provided, comprising:
[0006] The outer sheath has a sheath pipe and a connector pipe connected to the rear end of the sheath pipe, the sheath pipe and the connector pipe have a through operating channel, and the sheath pipe includes a base pipe segment connected to the front end of the connector pipe and a flexible pipe segment connected to the front end of the base pipe segment. The rear end of the connector pipe forms a joint, and the side of the connector pipe forms a negative pressure pipe in communication with the operating channel, and the negative pressure pipe is provided with a negative pressure adjusting structure;
[0007] The first inner core has a first core tube, a rotating snap joint and a first matching snap joint, the first core tube is made of hard material and has a flat head front end, the first core tube has a first lumen through which a ureteroscope passes, the rotating snap joint is formed at the rear end of the first core tube for fixing the ureteroscope, the first matching snap joint is formed in front of the rotating snap joint on the first core tube for engagement with the joint of the outer sheath, and the flat head front end of the first core tube is flush with the front end of the flexible tube segment when the first core tube is inserted into the outer sheath fixed by the first matching snap joint.
[0008] The second inner core has a second core tube and a second matching snap joint formed at the rear end of the second core tube for engagement with the joint of the outer sheath, the second core tube is made of soft and flexible material and has a tapered front end, the second core tube has a second lumen through which a guide wire passes, and the tapered front end of the second core tube protrudes from the front end of the flexible tube segment when the second core tube is inserted into the outer sheath fixed by the second matching snap joint.
[0009] In one embodiment of the ureter negative pressure suction sheath kit according to the present application, the negative pressure adjusting structure comprises an adjusting hole and a sliding cover, the adjusting hole is axially arranged in the wall of the negative pressure tube, the sliding cover is provided with a sliding block which is slidably arranged in the adjusting hole, and the inner side of the sliding cover has a sealing surface matched with the outer periphery of the negative pressure tube, and the sliding of the sliding cover along the adjusting hole changes the opening degree of the adjusting hole.
[0010] In one embodiment of the ureter negative pressure suction sheath kit according to the present application, the joint tube of the outer sheath is made of transparent material, and a plurality of color block marks are arranged at intervals on the outer periphery of the joint tube behind the negative pressure tube.
[0011] In one embodiment of the ureter negative pressure suction sheath kit according to the present application, the joint is provided with an annular flange surrounding the outer periphery of the joint tube, and the first matching snap joint and the second matching snap joint are buckled to the annular flange.
[0012] In one embodiment of the ureter negative pressure suction sheath kit according to the present application, a first scale is arranged axially on the base tube segment of the outer sheath.
[0013] In one embodiment of the ureter negative pressure suction sheath kit according to the present application, a second scale is arranged axially on the first core tube of the first inner core, and a third scale is arranged axially on the second core tube of the second inner core.
[0014] According to one embodiment of the ureter negative pressure suction sheath kit described in the application, the joint pipe of the outer sheath is further provided with a hand ring on the other side opposite to the negative pressure pipe.
[0015] According to one embodiment of the ureter negative pressure suction sheath kit described in the application, a pressure measuring pipe is further formed on the joint pipe and communicates with the operation channel.
[0016] According to one embodiment of the ureter negative pressure suction sheath kit described in the application, the outer sheath further has a sealing cover for covering the rear end of the joint pipe, and the sealing cover is sleeved on the joint pipe through a sleeve ring.
[0017] The ureter negative pressure suction sheath kit of the application has the following beneficial effects: the ureter negative pressure suction sheath kit according to the embodiment of the application is composed of an outer sheath and first and second inner cores, the first inner core has a hard core pipe through which a ureter flexible mirror passes, and the second inner core is the same as the inner core of an existing ureter flexible mirror sheath. In use, the insertion of the outer sheath is operated in two stages, the first stage is to improve the structural strength of the outer sheath through the first inner core, so that the advancement of the outer sheath is better controlled, and the outer sheath is inserted into the bladder under the direct vision of the ureter flexible mirror and then the guide wire is accurately inserted into the ureter, and then the second stage is to insert the outer sheath into the ureter along the guide wire through the second inner core, so as to realize the placement of the outer sheath in place. BRIEF DESCRIPTION OF DRAWINGS
[0018] The application will be further described below in combination with the drawings and embodiments, and the drawings are as follows:
[0019] Figure 1 is a structural schematic view of the ureter negative pressure suction sheath kit according to one embodiment of the application;
[0020] Figure 2 is a cross-sectional schematic view of the negative pressure adjusting structure according to one embodiment of the application;
[0021] Figure 3 is a longitudinal cross-sectional schematic view of the negative pressure adjusting structure shown in Figure 2 is in a closed state;
[0022] Figure 4 is a longitudinal cross-sectional schematic view of the negative pressure adjusting structure shown in Figure 2 is in a maximum opening state.
[0023] Brief Description of Drawings: 100-ureteral negative pressure suction sheath kit; 10-outer sheath; 11-sheath tube; 111-base pipe section; 112-flexible pipe section; 113-first scale; 12-joint pipe; 121-color block identification; 13-operation channel; 14-joint part; 141-engaging flange; 15-sealing cover; 151-thimble; 16-negative pressure pipe; 17-negative pressure adjusting structure; 171-adjusting hole; 172-sliding cover; 1721-sealing surface; 173-sliding block; 174-limiting buckle; 18-handheld ring; 19-pressure measuring pipe; 20-first inner core; 21-first core pipe; 211-flat head front end; 212-second scale; 22-first joint part; 23-first opposing buckle joint; 24-rotary buckle joint; 25-first lumen; 30-second inner core; 31-second core pipe; 311-tapered front end; 312-third scale; 32-second joint part; 33-second opposing buckle joint; 34-second lumen. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. Moreover, the examples in the present application and the features in the examples can be combined with each other without conflict.
[0025] The present application proposes a ureteral negative pressure suction sheath kit composed of an outer sheath, a first inner core and a second inner core to facilitate operation and ensure placement in place. Figure 1 The structure of the ureteral negative pressure suction sheath kit 100 according to an embodiment of the present application is shown. Referring to FIG. 1, the ureteral negative pressure suction sheath kit 100 is composed of an outer sheath 10, a first inner core 20 and a second inner core 30. Figure 1As shown, the ureteral negative pressure suction sheath kit 100 includes an outer sheath 10, a first inner core 20, and a second inner core 30. The outer sheath 10 consists of a sheath tube 11 and a connector tube 12 connected to the rear end of the sheath tube 11. Both the sheath tube 11 and the connector tube 12 have a through-flow operating channel 13. The sheath tube 11 further includes a base tube segment 111 connected to the front end of the connector tube 12 and a flexible tube segment 112 connected to the front end of the base tube segment 111. The base tube segment 111 may have a certain degree of bending elasticity, for example, being made of plastic material, to adapt to the physiological curvature of the ureter. The flexible tube segment 112 has greater flexibility than the base tube segment 111, for example, being made of rubber or silicone material, and can be actively or passively bent. The base tube segment 111 has a first graduation 113 distributed axially to facilitate observation of the insertion depth of the outer sheath 10. The connector tube 12 is connected to the rear end of the base tube section 111 of the sheath tube 11, and has a larger internal cavity than the sheath tube 11 to facilitate the insertion of other devices. A joint portion 14 is formed at the rear end of the connector tube 12, and a negative pressure tube 16 communicating with the operating channel 13 is formed on the side of the connector tube 12. A handheld ring 18 and a pressure measuring tube 19 are provided on the opposite side of the negative pressure tube 16. The negative pressure tube 16 is used to connect an external negative pressure suction device for negative pressure suction. A negative pressure adjustment structure 17 is also provided on the negative pressure tube 16 to adjust the magnitude of the negative pressure.
[0026] The pressure measuring tube 19 is used to connect a pressure sensor to monitor the intrarenal pelvis pressure, improving surgical safety. For ease of operation and identification, the connector tube 12 is preferably made of a transparent material, and multiple color-coded markers 121 are spaced apart on the outer periphery of the connector tube 12 behind the negative pressure tube 17. These markers 121 help the doctor more easily identify the position of the flexible ureteroscope when it needs to be withdrawn behind the negative pressure tube 17 during negative pressure lithotripsy, preventing the flexible ureteroscope from dislodging from the rear end of the connector tube 12. Furthermore, the outer sheath 10 is equipped with a sealing cap 15 to cover the rear end of the connector tube 12 when not in use. The sealing cap 15 is fitted onto the connector tube 12 via a collar 151 to prevent loss.
[0027] See also Figure 1As shown, the first inner core 20 has a first core tube 21 and a first connector 22 connected to the rear end of the first core tube 21. The first core tube 21 has a first lumen 25 that extends through the front and rear, allowing a flexible ureteroscope to pass through. The first connector 22 forms a rotating snap-fit connector 24 for fixing the flexible ureteroscope. A first mating snap-fit connector 23 is also provided on the first core tube 21 in front of the rotating snap-fit connector 24 for engaging and fixing with the joint 14 of the outer sheath 10. Specifically, the first core tube 21 is made of a rigid material, such as stainless steel, and has much greater rigidity than the base tube section 111 of the outer sheath 10. The front end of the first core tube 21 is a flat front end 211. When the first inner core 20 is inserted into the operating channel 13 of the outer sheath 10 and engaged and fixed with the joint 14 of the outer sheath 10 by the first mating snap-fit connector 23, the flat front end 211 of the first core tube 21 is flush with the front end of the flexible tube section 112 of the outer sheath 10. See details. Figure 1 As shown, the joint 14 of the outer sheath 10 is provided with an annular flange 141 surrounding the outer periphery of the connector tube 12. After the first inner core 20 is inserted into the outer sheath 10, it is secured to the annular flange 141 by the first mating snap-fit connector 23. In addition, a second scale 212 distributed along the axial direction is also formed on the first core tube 21.
[0028] See also Figure 1 As shown, the second inner core 30 has a second core tube 31 and a second connector 32 connected to the rear end of the second core tube 31. The second core tube 31 has a second lumen 34 that extends through the front and rear for the guidewire to pass through. The second connector 32 forms a second mating snap-fit connector 33 for engaging and fixing with the joint 14 of the outer sheath 10. Specifically, the second core tube 31 is made of a soft, flexible, and bendable material (e.g., plastic) and has a tapered front end 311 that gradually decreases in size from back to front. When the second inner core 30 is inserted into the operating channel 13 of the outer sheath 10 and engaged and fixed by the second mating snap-fit connector 33 with the annular flange 141 of the joint 14 of the outer sheath 10, the tapered front end 311 of the second core tube 31 extends from the front end of the flexible tube segment 112 of the outer sheath 10 to guide the outer sheath 10 into the ureter. In addition, a third scale 312 distributed axially is also formed on the second core tube 31 for easy operation and observation.
[0029] The three-piece ureteral negative pressure suction sheath kit 100 according to the above embodiments of this application is used in ureteroscopic surgery as follows:
[0030] The first step is to insert the flexible ureteroscope into the first lumen 25 of the first inner core 20, aligning the front end of the flexible ureteroscope with the flat front end 211 of the first inner core 20, and then securing the flexible ureteroscope by the rotating snap-fit connector 24 at the rear end of the first inner core 20.
[0031] The second step is to insert the first inner core 20 of the ureteroscope, which has been installed and fixed, into the operating channel 13 of the outer sheath 10, and fix it by the first mating snap connector 23 on the first inner core 20, which locks the annular flange 141 on the connector portion 14 of the outer sheath 10.
[0032] The third step involves inserting the outer sheath 10, containing the first inner core 20 and the flexible ureteroscope, into the bladder under direct visualization with the flexible ureteroscope. The ureteral orifice is located, and a guidewire is inserted through the operating channel of the flexible ureteroscope. The guidewire is then secured, and the flexible ureteroscope and the first inner core 20 are withdrawn, leaving the outer sheath 10 and guidewire in place. At this point, the tip of the outer sheath 10 is inside the bladder, and the guidewire is inserted into the ureter.
[0033] Fourth step: Insert the second inner core 30 into the operating channel 13 of the outer sheath 10 through the guide wire, and lock the second mating buckle 33 on the second inner core 30 into the annular flange 141 on the connector 14 of the outer sheath 10 to fix the second inner core 30 to the outer sheath 10. Then, through the conical front end 311 of the second inner core 30, place the outer sheath 10 with the second inner core 20 inside into the ureter along the guide wire.
[0034] Fifth step, remove the second inner core 30 and guide wire, and reinsert the flexible ureteroscope into the operating channel of the outer sheath 10 for surgery. The flexible tube segment 112 of the outer sheath 10 can bend with the bending of the flexible ureteroscope. During the operation, the negative pressure adjustment structure on the negative pressure tube 16 of the outer sheath 10 can be operated as needed to adjust the magnitude of the negative pressure.
[0035] See details Figures 2 to 4 As shown, in one embodiment of this application, the negative pressure regulating structure 17 on the negative pressure pipe 16 includes an regulating hole 171 and a sliding cover 172. The regulating hole 171 is axially formed in the pipe wall of the negative pressure pipe 16. The sliding cover 172 has a slider 173 that is slidably engaged in the regulating hole 171. Limiting buckles 174 are respectively provided on both sides of the bottom of the slider 173. The limiting buckles 174 abut against the inner wall of the negative pressure pipe 16 to prevent the slider 173 from dislodging from the regulating hole 171. The inner side of the sliding cover 172 has a sealing surface 1721 adapted to the outer periphery of the negative pressure pipe 16. Sliding the sliding cover 172 along the regulating hole 171 changes the opening degree of the regulating hole 171. See also... Figure 3 As shown, when the slider 173 of the sliding cover 172 slides along the adjusting hole 171 to the rightmost end of the adjusting hole 171, the sealing surface 1721 of the sliding cover 172 completely closes the adjusting hole 171. See also... Figure 4 As shown, when the slider 173 of the sliding cover 172 slides along the adjusting hole 171 to the rightmost end of the adjusting hole 171, the sealing surface 1721 of the sliding cover 172 opens the adjusting hole 171 to its maximum. In this way, the opening degree of the adjusting hole 171 can be changed by sliding the sliding cover 172 left and right, thereby adjusting the magnitude of the negative pressure inside the sheath.
[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A ureteral negative pressure suction sheath kit, characterized in that, include: The outer sheath has a sheath tube and a connector tube connected to the rear end of the sheath tube. The sheath tube and the connector tube have a through operating channel. The sheath tube includes a base tube section connected to the front end of the connector tube and a flexible tube section connected to the front end of the base tube section. The rear end of the connector tube forms a joint. The side of the connector tube forms a negative pressure tube communicating with the operating channel. The negative pressure tube is provided with a negative pressure adjustment structure. The first inner core has a first core tube, a rotating snap-fit connector, and a first mating snap-fit connector. The first core tube is made of a rigid material and has a flat front end. The first core tube has a first lumen that runs through the front and rear to allow a ureteroscope to pass through. The rotating snap-fit connector is formed at the rear end of the first core tube to fix the ureteroscope. The first mating snap-fit connector is formed in front of the rotating snap-fit connector on the first core tube to engage and fix it with the joint of the outer sheath. When the first inner core is inserted into the outer sheath and is engaged and fixed by the first mating snap-fit connector with the joint of the outer sheath, the flat front end of the first core tube is flush with the front end of the flexible tube segment. The second inner core has a second core tube and a second mating snap-fit connector formed at the rear end of the second core tube for engaging and fixing with the joint of the outer sheath. The second core tube is made of a soft, flexible material and has a tapered front end. The second core tube has a second lumen that extends through the front and rear for the guide wire to pass through. When the second inner core is inserted into the outer sheath and engaged and fixed with the outer sheath by the second mating snap-fit connector, the tapered front end of the second core tube extends from the front end of the flexible tube segment.
2. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, The negative pressure regulating structure includes an regulating hole and a sliding cover. The regulating hole is axially opened in the wall of the negative pressure pipe. The sliding cover is provided with a slider that is slidably engaged in the regulating hole. The inner side of the sliding cover has a sealing surface that is adapted to the outer periphery of the negative pressure pipe. The sliding cover changes the opening degree of the regulating hole by sliding along the regulating hole.
3. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, The connector tube of the outer sheath is made of transparent material, and multiple color blocks are spaced apart on the outer periphery of the connector tube behind the negative pressure tube.
4. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, The joint is provided with an annular flange surrounding the outer periphery of the connector tube, and the first and second mating snap-fit connectors snap onto the annular flange.
5. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, The base tube section of the outer sheath has a first scale distributed along the axial direction.
6. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, The first core tube of the first inner core has a second scale distributed along the axial direction, and the second core tube of the second inner core has a third scale distributed along the axial direction.
7. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, The outer sheath's connector tube also has a hand ring on the opposite side of the negative pressure tube.
8. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, A pressure testing tube communicating with the operating channel is also formed on the connector tube.
9. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that, The outer sheath also has a sealing cap for covering the rear end of the connector tube, the sealing cap being fitted onto the connector tube by a collar.