Negative pressure suction sheath kit for ureter

Abstract

The invention relates to a negative pressure suction sheath kit for a ureter. The negative pressure suction sheath kit comprises an outer sheath, a first inner core and a second inner core, the outer sheath is provided with a sheath tube and a connector tube connected to the rear end of the sheath tube, the sheath tube comprises a base tube section and a flexible tube section connected to the front end of the base tube section, a joint part is formed at the rear end of the connector tube, a negative pressure tube communicated with the operation channel is formed on the side portion of the connector tube, and a negative pressure adjusting structure is arranged on the negative pressure tube. The first inner core is provided with a first core tube made of a hard material, a rotary buckle joint used for fixing the flexible ureteroscope and a first involution buckle joint used for being buckled and fixed with the joint part of the outer sheath, and when the first inner core is inserted and fixed in the outer sheath, the front end of the flat head of the first core tube is flush with the front end of the flexible tube section. And the second inner core is provided with a second core tube and a second involution buckle joint used for being buckled and fixed with the joint part of the outer sheath, and when the second inner core is inserted and fixed in the outer sheath, the conical front end of the second core tube extends out of the front end of the flexible tube section. The external member is more convenient to operate, and the outer sheath can be placed in place.

Description

Technical Field

[0001] The present application relates to a medical device, and more particularly to a ureteral negative pressure suction sheath kit. Background Art

[0002] In recent years, with the popularization of endoscopic technology and the popularization of minimally invasive concepts, ureteroscopic technology has become a very important diagnostic and treatment method in urology. Currently, ureteroscopic lithotripsy mainly uses a ureteroscope to enter the ureter and renal pelvis and calyx through the urethra, and then the soft ureteroscope breaks the stones and sucks out the stones through the negative pressure suction channel. It has the advantages of minimally invasive, safe, less painful, fast recovery, and can be observed and broken under direct vision.

[0003] During the operation, the negative pressure suction ureteroscope sheath is an essential auxiliary device, which provides an access channel for ureteroscope surgery through the urethra and ureteral tube. The existing ureteroscope sheath is a two-piece type, including an outer sheath and an inner core. When in use, the inner core is inserted into the outer sheath, and the outer sheath and the inner core are placed into the ureter under the guidance of the guide wire. Then the inner core is pulled out, and the outer sheath is used as an operating channel to insert the ureteroscope into the outer sheath and enter the renal pelvis for surgical operation. Since the outer sheath and the inner core are made of materials with certain bending elasticity, such as plastic materials, it is easy to be blocked and difficult to control in the tortuous and narrow ureter, and it is impossible to ensure that the outer sheath is placed in place by inserting the sheath only under the guidance of the guide wire. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a ureteral negative pressure suction sheath kit which can place the outer sheath 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 ureteral negative pressure suction sheath kit is proposed, comprising:

[0006] An outer sheath, comprising a sheath tube and a joint tube connected to the rear end of the sheath tube, the sheath tube and the joint tube having a through operation channel, and the sheath tube comprising a base tube section connected to the front end of the joint tube and a flexible tube section connected to the front end of the base tube section, the rear end of the joint tube forming a joint portion, the side of the joint tube forming a negative pressure tube communicating with the operation channel, and the negative pressure tube being provided with a negative pressure regulating structure;

[0007] The first inner core comprises a first core tube, a rotating snap joint and a first mating snap joint, wherein the first core tube is made of a hard material and has a flat front end, the first core tube has a first lumen that passes through the front and back and can be used for the ureteroscope to pass through, the rotating snap joint is formed at the rear end of the first core tube for fixing the ureteroscope, the first mating snap joint is formed in front of the rotating snap joint on the first core tube for mating with the joint of the outer sheath, and when the first inner core is inserted into the outer sheath and is mating with the joint of the outer sheath by the first mating snap joint, the flat front end of the first core tube is flush with the front end of the flexible tube section;

[0008] The second inner core has a second core tube and a second mating snap-fit ​​joint formed at the rear end of the second core tube for being snapped and fixed with the joint of the outer sheath. The second core tube is made of a soft and flexible material and has a tapered front end. The second core tube has a second tube cavity that passes through the front and back for the guide wire to pass through. When the second inner core is inserted into the outer sheath and is snapped and fixed with the joint of the outer sheath by the second mating snap-fit ​​joint, the tapered front end of the second core tube extends out from the front end of the flexible tube section.

[0009] According to one embodiment of the ureteral negative pressure suction sheath kit described in the present application, the negative pressure adjustment structure includes an adjustment hole and a sliding cover, the adjustment hole is axially opened in the tube wall of the negative pressure tube, the sliding cover is provided with a slider slidably clamped in the adjustment hole, and the inner side of the sliding cover has a sealing surface adapted to the outer periphery of the negative pressure tube, and the sliding of the sliding cover along the adjustment hole changes the opening of the adjustment hole.

[0010] According to one embodiment of the ureteral negative pressure suction sheath kit described in the present application, the connector tube of the outer sheath is made of a transparent material, and a plurality of color block markings are arranged at intervals on the outer circumference of the connector tube behind the negative pressure tube.

[0011] According to one embodiment of the ureteral negative pressure suction sheath kit described in the present application, the joint portion is provided with an annular flange surrounding the outer circumference of the connector tube, and the first pair of snap-fit ​​connectors and the second pair of snap-fit ​​connectors are snapped onto the annular flange.

[0012] According to one embodiment of the ureteral negative pressure suction sheath kit described in the present application, a first scale distributed along the axial direction is formed on the base tube section of the outer sheath.

[0013] According to one embodiment of the ureteral negative pressure suction sheath kit described in the present application, a second scale distributed along the axial direction is formed on the first core tube of the first inner core, and a third scale distributed along the axial direction is formed on the second core tube of the second inner core.

[0014] According to one embodiment of the ureteral negative pressure suction sheath kit described in the present application, the connector tube of the outer sheath is further provided with a hand-holding ring on the other side opposite to the negative pressure tube.

[0015] According to one embodiment of the ureteral negative pressure aspiration sheath kit described in the present application, a pressure measuring tube connected to the operating channel is also formed on the connector tube.

[0016] According to one embodiment of the ureteral negative pressure suction sheath kit described in the present application, the outer sheath further has a sealing cover for covering the rear end of the connector tube, and the sealing cover is sleeved on the connector tube through a collar.

[0017] The ureteral negative pressure suction sheath kit of the present application has the following beneficial effects: the ureteral negative pressure suction sheath kit according to the embodiment of the present application is composed of an outer sheath, a first inner core, and a second inner core. The first inner core has a hard core tube for the ureteroscope to pass through, and the second inner core is the same as the inner core of the existing ureteroscope sheath. When in use, the outer sheath is inserted in two stages. In the first stage, the structural strength of the outer sheath is improved by the first inner core, so that the propulsion of the outer sheath is better controlled. The outer sheath is inserted into the bladder under the direct vision of the ureteroscope, and the guide wire is accurately inserted into the ureter. Then, in the second stage, the outer sheath is inserted into the ureter along the guide wire through the second inner core to achieve the outer sheath in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 This is a schematic structural diagram of a ureteral negative pressure suction sheath kit according to an embodiment of the present application;

[0020] Figure 2 is a cross-sectional schematic diagram of a negative pressure regulating structure in one embodiment of the present application;

[0021] Figure 3 yes Figure 2 A longitudinal cross-sectional schematic diagram of the negative pressure regulating structure shown in the closed state;

[0022] Figure 4 yes Figure 2 The longitudinal section diagram of the negative pressure regulating structure shown is in the maximum opening state.

[0023] Description of the accompanying drawings: 100-ureteral negative pressure suction sheath kit; 10-outer sheath; 11-sheath tube; 111-base tube section; 112-flexible tube section; 113-first scale; 12-connector tube; 121-color block mark; 13-operating channel; 14-joining part; 141-clamping flange; 15-sealing cover; 151-ring; 16-negative pressure tube; 17-negative pressure adjustment structure; 171-adjustment hole; 172-sliding cover; 1721-sealing surface; 173- Slider; 174-limiting buckle; 18-handling ring; 19-pressure measuring tube; 20-first inner core; 21-first core tube; 211-flat head front end; 212-second scale; 22-first joint part; 23-first pair of snap joints; 24-rotating snap joint; 25-first tube cavity; 30-second inner core 31-second core tube; 311-conical front end; 312-third scale; 32-second joint part; 33-second pair of snap joints; 34-second tube cavity. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the embodiments in the present application and the features in the embodiments may be combined with each other in the absence of conflict.

[0025] The present application proposes a ureteral negative pressure suction sheath kit consisting of an outer sheath, a first inner core and a second inner core, so as to facilitate operation and ensure proper placement. Figure 1 FIG. 1 is a schematic structural diagram of a ureteral negative pressure suction sheath kit 100 according to an embodiment of the present application. 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. Among them, the outer sheath 10 is composed of a sheath tube 11 and a joint tube 12 connected to the rear end of the sheath tube 11, and the sheath tube 11 and the joint tube 12 have a through operation channel 13. The sheath tube 11 further includes a base tube section 111 connected to the front end of the joint tube 12 and a flexible tube section 112 connected to the front end of the base tube section 111. The base tube section 111 may have a certain bending elasticity, for example, it is made of plastic material, and can adapt to the physiological bending of the ureter. The flexible tube section 112 has greater flexibility than the base tube section 111, for example, it is made of rubber or silicone material, and can be bent actively or passively. A first scale 113 distributed along the axial direction is formed on the base tube section 111 to facilitate the 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 inner cavity than the sheath tube 11 to facilitate the insertion of other devices. The rear end of the connector tube 12 forms a joint 14, and the side of the connector tube 12 forms a negative pressure tube 16 connected to the operation channel 13, and a hand-held ring 18 and a pressure measuring tube 19 are provided on the other side opposite to the negative pressure tube 16. The negative pressure tube 16 is used to connect an external negative pressure suction device for negative pressure suction, and a negative pressure regulating structure 17 is also provided on the negative pressure tube 16 to adjust the size of the negative pressure.

[0026] . The pressure measuring tube 19 is used to connect to the pressure sensor to monitor the pressure inside the renal pelvis and improve the safety of the operation. In order to facilitate operation identification, the joint tube 12 is preferably made of a transparent material, and the outer periphery of the joint tube 12 can also be provided with a plurality of color block marks 121 at intervals behind the negative pressure tube 17. In this way, when the ureteroscope needs to be withdrawn to the rear of the negative pressure tube 17 during the negative pressure suction lithotripsy operation, these color block marks 121 can help the doctor more easily identify the position where the ureteroscope is withdrawn and prevent the ureteroscope from falling out of the rear end of the joint tube 12. In addition, the outer sheath 10 is also provided with a sealing cover 15 for covering the rear end of the joint tube 12 when not in use. The sealing cover 15 is sleeved on the joint tube 12 through a ring 151 to prevent loss.

[0027] See also Figure 1As shown, the first inner core 20 has a first core tube 21 and a first joint portion 22 connected to the rear end of the first core tube 21. The first core tube 21 has a first lumen 25 that passes through the front and back and can be used for the ureteroscope to pass through. The first joint portion 22 forms a rotating snap joint 24 for fixing the ureteroscope. The first core tube 21 is also provided with a first matching snap joint 23 in front of the rotating snap joint 24, which is used to snap and fix with the joint portion 14 of the outer sheath 10. Specifically, the first core tube 21 is made of a hard material, such as 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 1 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 is snapped and fixed with the joint portion 14 of the outer sheath 10 by the first matching snap joint 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. For details, see Figure 1 As shown, the joint portion 14 of the outer sheath 10 is provided with an annular flange 141 surrounding the outer periphery of the joint tube 12, and the first inner core 20 is inserted into the outer sheath 10 and fixed to the annular flange 141 by snapping the first pair of snap joints 23. In addition, the first core tube 21 is also formed with a second scale 212 distributed along the axial direction.

[0028] See also Figure 1 Shown, the second inner core 30 has the second core tube 31 and the second joint 32 that is connected to the second core tube 31 rear end, the second core tube 31 has the second tube cavity 34 that can be provided with guide wire through front and back, and the second joint 32 forms the second coupling snap joint 33, which is used for fastening and fixing with the joint 14 of outer sheath 10. Specifically, the second core tube 31 is made of soft elastically bendable material (such as plastic material), and has a tapered front end 311 that gradually decreases from back to front, when the second inner core 30 is inserted in the operating channel 13 of outer sheath 10 and fastened and fixed by the annular flange 141 of the joint 14 of the second coupling snap joint 33 and outer sheath 10, the tapered front end 311 of the second core tube 31 stretches out from the front end of the flexible tube section 112 of outer sheath 10, which is used for guiding the outer sheath 10 to be inserted into the ureter. In addition, the second core tube 31 is also formed with the third scale 312 distributed axially to facilitate operation observation.

[0029] The three-piece ureteral negative pressure suction sheath kit 100 according to the above embodiment of the present application is used in ureteroscopy surgery as follows:

[0030] The first step is to insert the ureteroscope into the first lumen 25 of the first inner core 20, align the front end of the ureteroscope with the flat front end 211 of the first inner core 20, and fix the ureteroscope by the rotating snap joint 24 at the rear end of the first inner core 20.

[0031] In the second step, the first inner core 20 of the ureteroscope is inserted into the operation channel 13 of the outer sheath 10, and the first pair of snap joints 23 on the first inner core 20 clamp the annular flange 141 on the joint part 14 of the outer sheath 10 to fix it.

[0032] The third step is to push the outer sheath 10 with the first inner core 20 and the ureteroscope into the bladder under direct vision of the ureteroscope, find the ureteral orifice, insert the guide wire through the operation channel of the ureteroscope, fix the guide wire, and then withdraw the ureteroscope and the first inner core 20, leaving the outer sheath 10 and the guide wire. At this time, the front end of the outer sheath 10 is in the bladder, and the guide wire is inserted into the ureter.

[0033] The fourth step is to insert the second inner core 30 into the operating channel 13 of the outer sheath 10 through the guide wire, clamp the second matching snap joint 33 on the second inner core 30 with the annular flange 141 on the joint part 14 of the outer sheath 10 to fix the second inner core 30 to the outer sheath 10, and then insert the outer sheath 10 with the built-in second inner core 20 into the ureter along the guide wire through the conical front end 311 of the second inner core 30.

[0034] The fifth step is to withdraw the second inner core 30 and the guide wire, and reinsert the ureteroscope into the operating channel of the outer sheath 10 to perform surgery. The flexible tube segment 112 of the outer sheath 10 can bend with the bending of the ureteroscope. During the operation, the negative pressure regulating structure on the negative pressure tube 16 of the outer sheath 10 can be operated as needed to adjust the size of the negative pressure.

[0035] See Figures 2 to 4 As shown, according to one embodiment of the present application, the negative pressure regulating structure 17 on the negative pressure tube 16 includes an regulating hole 171 and a sliding cover 172. The regulating hole 171 is axially opened on the tube wall of the negative pressure tube 16, and the sliding cover 172 is provided with a slider 173 that is slidably mounted in the regulating hole 171. The bottom sides of the slider 173 are respectively provided with limit buckles 174, and the limit buckles 174 abut against the inner wall of the negative pressure tube 16 to prevent the slider 173 from escaping from the regulating hole 171. The inner side of the sliding cover 172 has a sealing surface 1721 that is adapted to the outer periphery of the negative pressure tube 16, and the sliding of the sliding cover 172 along the regulating hole 171 can change the opening of the regulating hole 171. See FIG. Figure 3 As shown in FIG. 1 , when the slider 173 of the slide cover 172 slides along the adjustment hole 171 to the rightmost end of the adjustment hole 171 , the sealing surface 1721 of the slide cover 172 completely closes the adjustment hole 171 . Figure 4 As shown, when the slider 173 of the sliding cover 172 slides along the adjustment hole 171 to the rightmost end of the adjustment hole 171, the sealing surface 1721 of the sliding cover 172 opens the adjustment hole 171 to the maximum. In this way, the opening of the adjustment hole 171 can be changed by sliding the sliding cover 172 left and right, thereby adjusting the negative pressure in the sheath tube.

[0036] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A ureteral negative pressure suction sheath kit, characterized in that: include: An outer sheath, comprising a sheath tube and a joint tube connected to the rear end of the sheath tube, the sheath tube and the joint tube having a through operation channel, and the sheath tube comprising a base tube section connected to the front end of the joint tube and a flexible tube section connected to the front end of the base tube section, the rear end of the joint tube forming a joint portion, the side of the joint tube forming a negative pressure tube communicating with the operation channel, and the negative pressure tube being provided with a negative pressure regulating structure; The first inner core comprises a first core tube, a rotating snap joint and a first mating snap joint, wherein the first core tube is made of a hard material and has a flat front end, the first core tube has a first lumen that passes through the front and back and can be used for the ureteroscope to pass through, the rotating snap joint is formed at the rear end of the first core tube for fixing the ureteroscope, the first mating snap joint is formed in front of the rotating snap joint on the first core tube for mating with the joint of the outer sheath, and when the first inner core is inserted into the outer sheath and is mating with the joint of the outer sheath by the first mating snap joint, the flat front end of the first core tube is flush with the front end of the flexible tube section; The second inner core has a second core tube and a second mating snap-fit ​​joint formed at the rear end of the second core tube for being snapped and fixed with the joint of the outer sheath. The second core tube is made of a soft and flexible material and has a tapered front end. The second core tube has a second tube cavity that passes through the front and back for the guide wire to pass through. When the second inner core is inserted into the outer sheath and is snapped and fixed with the joint of the outer sheath by the second mating snap-fit ​​joint, the tapered front end of the second core tube extends out from the front end of the flexible tube section.

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 tube wall of the negative pressure tube. The sliding cover is provided with a slider slidably clamped in the regulating hole, and the inner side of the sliding cover has a sealing surface adapted to the outer periphery of the negative pressure tube. The sliding of the sliding cover along the regulating hole changes the opening of 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 a transparent material, and a plurality of color block marks are arranged at intervals on the outer circumference 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 portion is provided with an annular flange surrounding the outer circumference of the joint pipe, and the first pair of snap-fit ​​joints and the second pair of snap-fit ​​joints are snap-fitted to 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 is formed with first scales distributed along the axial direction.

6. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that: A second scale distributed along the axial direction is formed on the first core tube of the first inner core, and a third scale distributed along the axial direction is formed on the second core tube of the second inner core.

7. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that: The connector tube of the outer sheath is also provided with a hand-holding ring on the other side opposite to the negative pressure tube.

8. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that: The joint pipe is also provided with a pressure measuring tube which is in communication with the operation channel.

9. The ureteral negative pressure suction sheath kit according to claim 1, characterized in that: The outer sheath also 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.

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