A negative pressure suction sheath tube for minimally invasive puncture lithotomy

Abstract

The utility model discloses a kind of negative pressure suction sheath tubes for minimally invasive puncture stone extraction, including negative pressure suction sheath tube, negative pressure suction sheath tube is equipped with Y type head, the front end of Y type head is equipped with the sheath tube catheter extending forward, the side of Y type head is equipped with the negative pressure connector pipe extending obliquely;The tail end of Y type head is equipped with insertion port, the edge of insertion port is equipped with two card-in grooves matching symmetrically outward protruding, the bottom of card-in groove is equipped with the buckle slot extending laterally, the end of buckle slot away from card-in groove is equipped with limit blocking wall, card-in groove and buckle slot are connected through;Expansion pipe is inserted in negative pressure suction sheath tube, expansion pipe is equipped with expansion pipe head on, expansion pipe head is inserted in the insertion port of Y type head before part.This application has buckle type head structure between expansion pipe and sheath tube, buckle structure prevents expansion pipe and sheath, rigid mirror slip, and improves operating stability.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a negative pressure suction sheath structure for minimally invasive puncture stone removal. Background Technology

[0002] In urological surgery, percutaneous nephrolithotomy involves using a minimally invasive surgical method. Clinically, this is mainly done under ultrasound or X-ray guidance. A 0.4-1cm diameter channel is established through a lumbar puncture and a sheath is inserted to reach the kidney directly. The channel is established through the lumbar puncture, and the renal pelvis is directly inserted to perform the procedure.

[0003] The stones are pulverized using laser (holmium laser) or pneumatic ballistic equipment. The fragments are then flushed through a sheath and suctioned out or removed by forceps via a Y-shaped connector on the sheath using a negative pressure tube. Currently, there is no locking structure between the sheath and the dilator. The front end of the dilator will retract under force, preventing it from forming a taper. During the procedure, a large apex (resisting force) must be used to prevent the dilator from retracting, which is prone to causing problems during operation. Furthermore, the front end of the sheath cannot be bent. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the purpose of this utility model is to provide a negative pressure suction sheath for minimally invasive puncture stone removal, which solves the problems of easy slippage and poor channel stability of traditional dilators during the puncture and channel establishment process in kidney stone removal surgery by means of a head snap-on structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A negative pressure suction sheath for minimally invasive puncture stone removal includes a negative pressure suction sheath with a Y-shaped head. The front end of the Y-shaped head has a forward-extending sheath catheter, and the side of the Y-shaped head has an obliquely extending negative pressure connector. The tail end of the Y-shaped head has an insertion port, and the edge of the insertion port has two matching symmetrical outward protruding locking grooves. The bottom of the locking groove has a laterally extending locking groove, and the end of the locking groove away from the locking groove has a limiting and blocking wall. The locking groove and the locking groove are connected through each other. An expansion tube is inserted into the negative pressure suction sheath. The expansion tube has an expansion tube head. The front part of the expansion tube head is inserted into the insertion port of the Y-shaped head. The front outer wall of the expansion tube head has double buckles that match two snap-fit ​​slots. The thickness of the double buckles is less than the width of the snap-fit ​​slots. After the double buckles are rotated, they can be snapped into the snap-fit ​​slots.

[0006] Furthermore, in some embodiments, the front end of the expansion tube head is provided with a forward-extending expansion channel, and the end of the expansion channel away from the expansion tube head is provided with a front cone. The expansion channel is inserted into the sheath conduit, and the front cone extends out of the outside of the sheath conduit after passing through the sheath conduit. The end of the sheath conduit away from the Y-shaped head is provided with a flexible curved section.

[0007] Furthermore, in some embodiments, the insertion port at the tail end of the Y-shaped head is provided with a sealing cap that can be fastened, and the sealing cap is connected to the Y-shaped head by a connecting strip.

[0008] Furthermore, in some embodiments, a negative pressure relief port is provided on the negative pressure relief port, and guide rails are provided on both sides of the negative pressure relief port. The guide rails are set on the outer wall of the negative pressure relief port. A pressure relief positioning protrusion is provided at the end of the guide rail near the Y-shaped head, and a sealing positioning protrusion is provided at the end of the guide rail away from the Y-shaped head. A U-shaped sliding cover is provided on the outside of the negative pressure relief port. The U-shaped sliding cover is fastened to the negative pressure relief port, and the end of the negative pressure relief port away from the Y-shaped head is connected to the negative pressure device.

[0009] Furthermore, in some embodiments, the bottom inner side of the U-shaped sliding cover is provided with a guide slide bar that matches the guide slide rail. The guide slide bar is locked in the guide slide rail. The end of the guide slide bar near the Y-shaped head is provided with a pressure relief positioning groove that matches the pressure relief positioning protrusion. The end of the guide slide bar away from the Y-shaped head is provided with a sealing positioning groove that matches the sealing positioning protrusion.

[0010] Furthermore, in some embodiments, a nephroscope tube is inserted into the negative pressure suction sheath, and after the tube is inserted into the sealing cap, it extends through the sheath catheter and out onto the outside of the sheath catheter.

[0011] This application features a snap-fit ​​head structure between the dilator and sheath, designed to create a direct channel from the lumbar skin to the renal pelvis during minimally invasive surgery. This creates a minimally invasive channel and secures instruments, facilitating efficient lithotripsy and stone retrieval using ballistic lithotripsy equipment and stone removal instruments after insertion of the rigid endoscope. The snap-fit ​​structure prevents slippage between the dilator, sheath, and rigid endoscope, improving operational stability and efficiency. Simultaneously, the endoscope tube performs lithotripsy through the sheath catheter channel, utilizing the serpentine curve of the endoscope tube to locate stones around the periphery of the renal pelvis. Attached Figure Description

[0012] Figure 1 This is a perspective view of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the expansion tube head in an embodiment of this utility model; Figure 3 This is an assembly diagram of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 5 This is a schematic diagram of the Y-shaped head portion of an embodiment of the present invention; Figure 6 for Figure 3 A structural diagram of section B; Figure 7 This is a schematic diagram illustrating the operation of an embodiment of the present utility model.

[0013] Explanation of markings in the diagram: 11. Dilatation tube, 12. Dilatation tube head, 13. Anterior cone head, 14. Double snap fastener, 15. Dilatation tube, 17. Insertion port, 18. Snap-in groove, 19. Negative pressure suction sheath, 21. Y-shaped head, 22. Sheath catheter, 23. Negative pressure connection tube, 24. U-shaped sliding cover, 25. Guide slide rail, 26. Connecting soft strip, 27. Sealing cap, 28. Closure positioning protrusion, 31. Pressure relief positioning protrusion, 32. Negative pressure relief port, 33. Guide slide, 34. Closure positioning groove, 35. Pressure relief positioning groove, 36. Soft bending section, 37. Limiting and blocking wall surface, 38. Nephroscope, 41. Endoscope tube, 42. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. To further understand the features, technical means, and specific objectives and functions achieved by this utility model, and to analyze its advantages and spirit, a detailed description of this utility model is provided below in conjunction with the accompanying drawings and specific embodiments.

[0015] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "front," "back," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0016] Please refer to the attached drawings. This application includes a negative pressure suction sheath 21, a Y-shaped head 22 on the negative pressure suction sheath 21, a forward-extending sheath tube 23 at the front end of the Y-shaped head 22, and a negative pressure tube 24 extending obliquely on the side of the Y-shaped head 22. An insertion port 17 is opened at the tail end of the Y-shaped head 22, and two matching symmetrical outward protruding locking grooves 18 are opened at the edge of the insertion port 17. A laterally (vertically) extending locking groove 19 is provided at the bottom of the locking groove 18, and a limiting blocking wall 38 is provided at the end of the locking groove 19 away from the locking groove 18. The locking groove 18 and the locking groove 19 are connected through each other. An expansion tube 11 is inserted into the negative pressure suction sheath 21. The expansion tube 11 has an expansion tube head 12, the front of which is inserted into the insertion port 17 of the Y-shaped head 22. The outer wall of the front part of the expansion tube head 12 has double snaps 14 that match two locking slots 18. The thickness of the double snaps 14 is less than the width of the locking slots 19. The double snaps 14 can be locked into the locking slots 19 after rotation. After the expansion tube head 12 is inserted into the insertion port 17 of the Y-shaped head 22, rotating it 45 degrees will lock it into place; rotating it 45 degrees in the opposite direction will release it for removal. When the Y-shaped head 22 and the expansion tube head 12 are locked together by the snap structure, the anterior conical head 13 at the front end of the expansion tube 15 and the sheath catheter 23 will form a cone shape, facilitating insertion into the renal pelvis from outside the body.

[0017] Furthermore, in one embodiment, the front end of the expansion tube head 12 is provided with a forward-extending expansion tube 15, and the end of the expansion tube 15 away from the expansion tube head 12 is provided with a front cone 13. The expansion tube 15 is inserted into the sheath tube conduit 23, and the front cone 13 extends out of the outside of the sheath tube conduit 23 after passing through the sheath tube conduit 23. The end (front end) of the sheath tube conduit 23 away from the Y-shaped head 22 is provided with a flexible bending section 37.

[0018] The insertion port 17 at the tail end of the Y-type head 22 is provided with a sealing cap 28 that can be fastened. The sealing cap 28 is connected to the Y-type head 22 through a connecting strip 27.

[0019] Furthermore, in one embodiment, a negative pressure relief port 33 is provided on the negative pressure relief port 24, and guide rails 26 are provided on both sides of the negative pressure relief port 33. The guide rails 26 are set on the outer wall of the negative pressure relief port 24. The end of the guide rail 26 near the Y-shaped head 22 is provided with a pressure relief positioning protrusion 32, and the end of the guide rail 26 away from the Y-shaped head 22 is provided with a sealing positioning protrusion 31. A U-shaped sliding cover 25 is provided on the outside of the negative pressure relief port 33. The U-shaped sliding cover 25 is fastened to the negative pressure relief port 24. The end of the negative pressure relief port 24 away from the Y-shaped head 22 is connected to the negative pressure device through a negative pressure suction tube. When the negative pressure device is turned on, there will be negative pressure continuously suctioning to draw in the broken stones.

[0020] Furthermore, in one embodiment, the inner bottom end of the U-shaped sliding cover 25 is provided with a guide slide 34 that matches the guide slide rail 26. The guide slide 34 is engaged in the guide slide rail 26. The end of the guide slide 34 near the Y-shaped head 22 is provided with a pressure relief positioning groove 36 that matches the pressure relief positioning protrusion 32, and the end of the guide slide 34 away from the Y-shaped head 22 is provided with a sealing positioning groove 35 that matches the sealing positioning protrusion 31. The U-shaped sliding cover 25 can be pushed with fingers in different directions and is ambidextrous.

[0021] When the pressure relief positioning groove 36 of the U-shaped sliding cover 25 is engaged with the pressure relief positioning protrusion 32, the negative pressure will be released from the negative pressure relief port 33 in this position, and will not attract gravel or liquid. When the sealing and positioning groove 35 of the U-shaped sliding cover 25 is engaged with the sealing and positioning protrusion 31, the U-shaped sliding cover 25 and the negative pressure relief port 33 are closed, thus forming a suction effect to draw out stones or fluid from the renal pelvis. The U-shaped sliding cover 25 has a sliding positioning function.

[0022] The combination of the U-shaped sliding cover 25 and the guide rail 26 allows the position of the U-shaped sliding cover 25 to control the size of the negative pressure relief port 33, thereby controlling the magnitude of the pressure suction.

[0023] After positioning is completed, the dilator 11 is pulled out from the negative pressure suction sheath 21, and the channel is established; the sealing cap 28 is placed on the Y-shaped head 22, and the endoscope tube 42 will pass through the middle of this soft sealing cap 28, so that there will be no air leakage from this head during negative pressure suction; at this time, the endoscope tube 42 of the nephroscope 41 is inserted into the endoscope tube 42 of the nephroscope 41 to perform the surgery.

[0024] The negative pressure suction sheath 21 contains a renal pelvic endoscope 41 with a tube 42 inserted into it. After the endoscope 42 is inserted into the sealing cap 28, it passes through the sheath catheter 23 and extends to the outside of the sheath catheter 23. The flexible curved section 37 at the front end of the sheath catheter 23 can bend with the endoscope 42. The flexible curved section 37 can be passively adjusted to bend with the endoscope 42 within the renal pelvis. The negative pressure suction sheath 21 is perforated at the waist and inserted into the renal pelvis to establish an instrument channel. The endoscope 42 is used to perform lithotripsy through the channel of the sheath catheter 23, using the serpentine curve of the endoscope 42 to locate stones around the periphery of the renal pelvis.

[0025] The above embodiments only illustrate several preferred implementations of this utility model, and their descriptions are relatively specific and detailed. It should be understood that this utility model is not limited to the forms disclosed herein and should not be considered as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or related field techniques or knowledge. This should not be construed as a limitation on the scope of this utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. Such modifications and changes do not depart from the spirit and scope of this utility model, and all fall within the protection scope of the appended claims. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A negative pressure suction sheath for minimally invasive puncture stone removal, comprising: The negative pressure suction sheath (21) is provided with a Y-shaped head (22), the front end of the Y-shaped head (22) is provided with a forward-extending sheath tube (23), and the side of the Y-shaped head (22) is provided with a negative pressure tube (24) extending obliquely. The Y-shaped head (22) is characterized in that an insertion port (17) is provided at the tail end, and two matching and symmetrically protruding snap-fit ​​grooves (18) are provided at the edge of the insertion port (17). A snap-fit ​​groove (19) extending laterally is provided at the bottom of the snap-fit ​​groove (18). A limiting blocking wall (38) is provided at the end of the snap-fit ​​groove (19) away from the snap-fit ​​groove (18). The snap-fit ​​groove (18) and the snap-fit ​​groove (19) are connected in a through manner. An expansion tube (11) is inserted into the negative pressure suction sheath (21). An expansion tube head (12) is provided on the expansion tube (11). The front part of the expansion tube head (12) is inserted into the insertion port (17) of the Y-shaped head (22). The front outer wall of the expansion tube head (12) is provided with double buckles (14) that match the two snap-fit ​​grooves (18). The thickness of the double buckles (14) is less than the width of the buckle groove (19). After the double buckles (14) are rotated, they can be snapped into the buckle groove (19).

2. The negative pressure suction sheath for minimally invasive puncture stone removal according to claim 1, characterized in that, The front end of the expansion tube head (12) is provided with an expansion tube (15) extending forward. The end of the expansion tube (15) away from the expansion tube head (12) is provided with a front cone (13). The expansion tube (15) is inserted into the sheath tube conduit (23). The front cone (13) passes through the sheath tube conduit (23) and extends out to the outside of the sheath tube conduit (23). The end of the sheath tube conduit (23) away from the Y-shaped head (22) is provided with a flexible curved section (37).

3. The negative pressure suction sheath for minimally invasive puncture stone removal according to claim 1, characterized in that, The insertion port (17) at the tail end of the Y-type head (22) is provided with a sealing cap (28) that can be fastened. The sealing cap (28) is connected to the Y-type head (22) by a connecting strip (27).

4. The negative pressure suction sheath for minimally invasive puncture stone removal according to claim 1, characterized in that, The negative pressure pipe (24) is provided with a negative pressure relief port (33). Guide slide rails (26) are provided on both sides of the negative pressure relief port (33). The guide slide rails (26) are set on the outer wall of the negative pressure pipe (24). The guide slide rail (26) is provided with a pressure relief positioning protrusion (32) at one end near the Y-shaped head (22) and a sealing positioning protrusion (31) at the other end away from the Y-shaped head (22). A U-shaped sliding cover (25) is provided on the outside of the negative pressure relief port (33). The U-shaped sliding cover (25) is fastened to the negative pressure pipe (24). The end of the negative pressure pipe (24) away from the Y-shaped head (22) is connected to the negative pressure device.

5. A negative pressure suction sheath for minimally invasive puncture stone removal according to claim 4, characterized in that, The bottom inner side of the U-shaped sliding cover (25) is provided with a guide slide (34) that matches the guide slide rail (26). The guide slide (34) is locked in the guide slide rail (26). The end of the guide slide (34) near the Y-shaped head (22) is provided with a pressure relief positioning groove (36) that matches the pressure relief positioning protrusion (32). The end of the guide slide (34) away from the Y-shaped head (22) is provided with a sealing positioning groove (35) that matches the sealing positioning protrusion (31).

6. The negative pressure suction sheath for minimally invasive puncture stone removal according to claim 1, characterized in that, The negative pressure suction sheath (21) is in which the endoscope tube (42) of the nephroscope (41) is inserted. After the endoscope tube (42) is inserted into the sealing cap (28), it passes through the sheath catheter (23) and extends out to the outside of the sheath catheter (23).

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