Medical guiding sheath

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a medical guiding sheath which comprises a sheath body, a sheath cap, a hose and an inner diameter adjusting assembly, a first channel is arranged in the sheath body, the sheath cap is sleeved at one end of the sheath body and provided with a second channel communicated with the first channel, and the hose is installed in the second channel. The inner diameter adjusting assembly comprises an extrusion part and a driving part, the extrusion part is connected with the driving part, the driving part is connected with the sheath cap, the end, away from the driving part, of the extrusion part is an extrusion end, the extrusion end abuts against one end face of the hose, and the driving part can drive the extrusion part to reciprocate in the extending direction of the second channel. And the compression amount of the extrusion end to the hose is adjusted. The compression amount of the extrusion end of the extrusion piece on the hose can be adjusted according to the specific specification of the flexible lens, the diameter of the third channel in the hose changes accordingly, sealing between the hose and the flexible lens is achieved, the sheath cap can be better matched with the flexible lens, and the sealing effect of the sheath cap and the flexible lens is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a medical guide sheath. Background Art

[0002] Flexible ureteroscopy is currently widely used in urology. It is mainly used to explore ureteral and kidney diseases and treat ureteral and kidney stones. Its main principle is to use flexible ureteroscope and advanced lithotripsy equipment to pass through the natural cavities of the human body: urethra, bladder, ureter, directly to the inside of the renal pelvis. The flexible ureteroscope searches for the location of the stone, and the lithotripsy equipment uses laser or pneumatic ballistic technology to crush the stone. Before the operation, a ureteral guide sheath is needed to establish the instrument channel to prevent damage to the human body and equipment.

[0003] An existing ureteral guide sheath includes a sheath body and a sheath cap. The sheath body is provided with an instrument channel for a soft endoscope to pass through. The sheath cap is provided with a through hole. The sheath cap is installed at the end of the sheath body. The through hole is connected to the instrument channel. The soft endoscope reaches a designated position of the human body through the through hole and the instrument channel. The sheath cap is made of silicone. The hole wall of the through hole clamps the soft endoscope to achieve sealing.

[0004] However, the existing ureteral guide sheath has a fixed specification of the sheath membrane, while the specifications of the soft endoscopes from different manufacturers are different. The sheath cap and the soft endoscope cannot be well adapted to each other, and there is a gap between the through hole of the sheath cap and the soft endoscope, resulting in a poor sealing effect. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to provide a medical guide sheath for the problem that the sheath cap of the existing ureteral guide sheath cannot be well adapted to the soft endoscope.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a medical guide sheath, comprising a sheath body, a sheath cap, a hose and an inner diameter adjustment assembly, wherein the sheath body is provided with a first channel, the sheath cap is sleeved on one end of the sheath body, the sheath cap is provided with a second channel connected to the first channel, the hose is installed in the second channel, and the hose is provided with a third channel for a soft endoscope to pass through;

[0007] The inner diameter adjustment assembly includes an extrusion member and a driving member, wherein the extrusion member is connected to the driving member, and the driving member is connected to the sheath cap. The end of the extrusion member away from the driving member is an extrusion end, and the extrusion end abuts against an end surface of the hose. The driving member can drive the extrusion member to reciprocate along the extension direction of the second channel to adjust the compression amount of the hose by the extrusion end.

[0008] Optionally, the driving member includes a driving cap, the driving cap includes a mounting cavity, one end of the extrusion member away from the hose is connected to the top wall of the mounting cavity, an insertion gap is provided between the extrusion member and the side wall of the mounting cavity, one end of the sheath cap away from the sheath body is inserted into the insertion gap, and the depth of the extrusion member extending into the second channel is adjusted by adjusting the length of the sheath cap inserted into the insertion gap;

[0009] The extrusion piece is provided with a fourth channel, the drive cap is provided with a fifth channel connected to the fourth channel, and the fourth channel is connected to the third channel.

[0010] Optionally, an internal thread is provided on a side wall of the installation cavity, an external thread is provided on an outer circumference of the sheath cap, and the drive cap is screwed onto the sheath cap.

[0011] Optionally, a stop platform is provided on the outer circumference of the sheath body, and the drive cap is also provided with an avoidance groove and an anti-slip plate, the avoidance groove is located at one end of the installation cavity close to the sheath body, the diameter of the avoidance groove is larger than the diameter of the installation cavity, the anti-slip plate is connected to the side wall of the avoidance groove, and the side of the anti-slip plate facing the stop platform is stopped and cooperated with the stop platform.

[0012] Optionally, a slope is provided on a side of the stopping platform facing away from the sheath body, and the slope is used to guide the anti-slip plate to pass over the stopping platform.

[0013] Optionally, the extruded member is an extruded tube, and a lumen of the extruded tube forms the fourth channel.

[0014] Optionally, a mounting ring is provided on the channel wall of the second channel, and one end of the hose away from the extrusion piece is connected to the mounting ring.

[0015] Optionally, a plug-in ring groove is provided on the mounting ring platform, and a plug-in tube is provided at one end of the hose away from the extrusion piece, and the plug-in tube is plugged into the plug-in ring groove.

[0016] Optionally, the hose comprises a tube body and an elastic tube, the elastic tube is arranged between the extrusion piece and the tube body, and the extrusion end abuts against the elastic tube.

[0017] Optionally, the sheath cap is spirally assembled on the sheath body.

[0018] According to the medical guide sheath of the embodiment of the utility model, the driving member can drive the extrusion member to move back and forth in the second channel, and can adjust the compression amount of the hose by the extrusion end of the extrusion member according to the specific specifications of the soft mirror, thereby changing the deformation amount of the hose. During the deformation of the hose, the diameter of the third channel in the hose also changes accordingly, so that the third channel can be in close contact with the outer periphery of the soft mirror, thereby achieving sealing between the hose and the soft mirror, so that the sheath cap can better adapt to the soft mirror, and the sealing effect between the sheath cap and the soft mirror is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a medical guide sheath provided in one embodiment of the utility model;

[0020] Figure 2 A schematic structural diagram of a medical guide sheath provided in one embodiment of the utility model (without the sheath body).

[0021] The figure numbers in the specification are as follows: 1. sheath body; 2. first channel; 3. hose; 4. sheath cap; 5. drive cap; 6. second channel; 7. mounting ring platform; 8. plug-in ring groove; 9. tube body; 10. third channel; 11. plug-in cylinder; 12. extrusion piece; 13. extrusion end; 14. fourth channel; 15. fifth channel; 16. mounting cavity; 17. internal thread; 18. external thread; 19. avoidance groove; 20. stop platform; 21. slope; 22. plug-in gap; 23. anti-drop plate; 24. elastic cylinder. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a medical guide sheath, including a sheath body 1, a sheath cap 4, a hose 3 and an inner diameter adjustment assembly, wherein the sheath body 1 is provided with a first channel 2, the sheath cap 4 is sleeved on one end of the sheath body 1, the sheath cap 4 is provided with a second channel 6 connected to the first channel 2, the hose 3 is installed in the second channel 6, and the hose 3 is provided with a third channel 10 for the soft endoscope to pass through.

[0024] The inner diameter adjustment assembly includes an extrusion member 12 and a driving member, wherein the extrusion member 12 is connected to the driving member, and the driving member is connected to the sheath cap 4. The end of the extrusion member 12 away from the driving member is an extrusion end 13, and the extrusion end 13 abuts against an end surface of the hose 3. The driving member can drive the extrusion member 12 to reciprocate along the extension direction of the second channel 6 to adjust the compression amount of the hose 3 by the extrusion end 13.

[0025] The driving member can drive the extruding member 12 to move back and forth in the second channel 6, and can adjust the compression amount of the hose 3 by the extruding end 13 of the extruding member 12 according to the specific specifications of the soft mirror, thereby changing the deformation amount of the hose 3. During the deformation of the hose 3, the diameter of the third channel 10 in the hose 3 also changes accordingly, so that the third channel 10 can be in close contact with the outer periphery of the soft mirror, thereby achieving sealing between the hose 3 and the soft mirror.

[0026] In one embodiment, the driving member includes a driving cap 5, and the driving cap 5 includes an installation cavity 16. The end of the extrusion member 12 away from the hose 3 is connected to the top wall of the installation cavity 16. An insertion gap 22 is provided between the extrusion member 12 and the side wall of the installation cavity 16. The end of the sheath cap 4 away from the sheath body 1 is inserted into the insertion gap 22. The depth of the extrusion member 12 extending into the second channel 6 is adjusted by adjusting the length of the sheath cap 4 inserted in the insertion gap 22.

[0027] The extrusion piece 12 is provided with a fourth channel 14 , the drive cap 5 is provided with a fifth channel 15 communicating with the fourth channel 14 , and the fourth channel 14 is communicated with the third channel 10 .

[0028] The extrusion end 13 is located at the lower end of the extrusion piece 12, and the extrusion end 13 is against the top end of the hose 3. The lower end of the fourth channel 14 of the extrusion piece 12 is connected to the third channel 10 of the hose 3, and the upper end of the fourth channel 14 is connected to the fourth and fifth channels of the driving cap 5. The soft mirror enters the first channel 2 of the sheath body 1 through the fifth channel 15, the fourth channel 14, the third channel 10 and the second channel 6 in sequence.

[0029] The upper end of the extrusion member 12 is connected to the driving cap 5. In this embodiment, the extrusion member 12 and the driving cap 5 are designed as one body. When the driving cap 5 reciprocates relative to the sheath cap 4, the extrusion member 12 can be driven to reciprocate relative to the sheath cap 4, thereby changing the extrusion amount of the extrusion end 13 on the hose 3. The structure is simple and easy to manufacture.

[0030] In one embodiment, an internal thread 17 is provided on the side wall of the installation cavity 16 , an external thread 18 is provided on the outer circumference of the sheath cap 4 , and the drive cap 5 is screwedly assembled on the sheath cap 4 .

[0031] An external thread 18 is provided on the outer circumferential surface of the drive cap 5, and an internal thread 17 is provided on the side wall of the mounting cavity 16. The external thread 18 cooperates with the internal thread 17 so that the drive cap 5 is spirally assembled on the sheath cap 4. By screwing the drive cap 5, the position of the drive cap 5 relative to the sheath cap 4 is changed, thereby adjusting the extrusion amount of the extrusion piece 12 on the hose 3, which is convenient for design and manufacturing.

[0032] In one embodiment, a stop platform 20 is provided on the outer periphery of the sheath body 1, and the drive cap 5 is also provided with an avoidance groove 19 and an anti-slip plate 23, the avoidance groove 19 is located at one end of the installation cavity 16 close to the sheath body 1, the diameter of the avoidance groove 19 is larger than the diameter of the installation cavity 16, the anti-slip plate 23 is connected to the groove side wall of the avoidance groove 19, and the side of the anti-slip plate 23 facing the stop platform 20 is stopped and cooperated with the stop platform 20.

[0033] When the driving cap 5 moves up and down, the avoidance groove 19 can form an avoidance space for the stop platform 20 , and the side of the anti-drop plate 23 facing the stop platform 20 stops and cooperates with the stop platform 20 , which can prevent the driving cap 5 from falling off from the sheath cap 4 .

[0034] In one embodiment, a slope 21 is provided on a side of the stopping platform 20 facing away from the sheath body 1 , and the slope 21 is used to guide the anti-drop plate 23 to pass over the stopping platform 20 .

[0035] In this embodiment, the driving cap 5 has a certain tension, and the anti-slip plate 23 can be gradually installed on the sheath cap 4 along the slope 21. The slope 21 guides the anti-slip plate 23, making it easy to install the driving cap 5.

[0036] In one embodiment, the extruded member 12 is an extruded tube, and the lumen of the extruded tube forms the fourth channel 14 .

[0037] The extruded member 12 is an extruded tube, that is, the extruded member 12 is a tubular structure, and the upper end of the extruded tube is connected to the driving cap 5. The tubular extruded tube structure has greater strength and is not easily deformed.

[0038] In one embodiment, a mounting ring 7 is provided on the channel wall of the second channel 6 , and one end of the hose 3 away from the extrusion piece 12 is connected to the mounting ring 7 .

[0039] The mounting ring 7 is protruded on the channel wall of the second channel 6 , and the lower end of the hose 3 can be seated on the mounting ring 7 , which can serve as a force-bearing platform for the hose 3 and can also limit the displacement of the hose 3 to prevent the hose 3 from moving back and forth in the second channel 6 .

[0040] In one embodiment, a plug-in ring groove 8 is provided on the mounting ring platform 7 , and a plug-in tube 11 is provided at one end of the hose 3 away from the extrusion piece 12 , and the plug-in tube 11 is plugged into the plug-in ring groove 8 .

[0041] The plug-in tube 11 is located at the lower end of the hose 3 . The inner diameter of the plug-in tube 11 is smaller than the diameter of the third channel 10 . The plug-in tube 11 is plugged downward into the plug-in ring groove 8 . The plug-in ring groove 8 can clamp the plug-in tube 11 to prevent the hose 3 from shaking.

[0042] In one embodiment, the hose 3 includes a tube body 9 and an elastic tube 24 . The elastic tube 24 is disposed between the extrusion member 12 and the tube body 9 , and the extrusion end 13 abuts against the elastic tube 24 .

[0043] The tube body 9 is made of silicone and is the main deformation structure to achieve sealing with the soft lens. The elastic tube 24 is arranged between the tube body 9 and the extrusion end 13 to play a buffering role, avoiding direct contact between the extrusion end 13 and the tube body 9 and causing wear, thereby increasing the service life of the tube body 9.

[0044] In one embodiment, the sheath cap 4 is spirally assembled on the sheath body 1 , which has a simple structure, is easy to design and manufacture, and is convenient to assemble and disassemble.

[0045] The working principle of the medical guide sheath of the embodiment of the utility model is as follows:

[0046] Before guiding the soft mirror into the human body, the sheath cap 4 is first screwed onto the sheath body 1, and then the soft mirror is inserted into the driving cap 5 from the fifth channel 15 of the driving cap 5. The soft mirror passes through the fifth channel 15, the fourth channel 14, the third channel 10 and the second channel 6 in sequence into the first channel 2 of the sheath body 1, and then enters the designated position of the human body along the first channel 2. Then, the driving cap 5 is tightened so that the extrusion end 13 squeezes the hose 3 downward. When the hose 3 is deformed, the inner diameter of the third channel 10 becomes smaller, so that the channel wall of the third channel 10 is tightly fitted with the outer periphery of the soft mirror, thereby achieving sealing between the sheath cap 4 and the soft mirror.

[0047] According to the medical guide sheath of the embodiment of the utility model, the driving member can drive the extrusion member 12 to move back and forth in the second channel 6, and can adjust the compression amount of the hose 3 by the extrusion end 13 of the extrusion member 12 according to the specific specifications of the soft mirror, thereby changing the deformation amount of the hose 3. During the deformation of the hose 3, the diameter of the third channel 10 in the hose 3 also changes accordingly, so that the third channel 10 can be in close contact with the outer periphery of the soft mirror, thereby realizing the sealing between the hose 3 and the soft mirror, so that the sheath cap 4 can better adapt to the soft mirror, thereby improving the sealing effect between the sheath cap 4 and the soft mirror.

[0048] In other embodiments, the extrusion member 12 may be a plurality of extrusion rods connected to the driving cap 5 .

[0049] In other embodiments, the tube body 9 and the elastic tube 24 are designed as one piece.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A medical guide sheath, characterized in that: The invention comprises a sheath body (1), a sheath cap (4), a hose (3) and an inner diameter adjustment component, wherein the sheath body (1) is provided with a first channel (2), the sheath cap (4) is sleeved on one end of the sheath body (1), the sheath cap (4) is provided with a second channel (6) connected to the first channel (2), the hose (3) is installed in the second channel (6), and the hose (3) is provided with a third channel (10) for a soft endoscope to pass through; The inner diameter adjustment component comprises an extrusion member (12) and a driving member, wherein the extrusion member (12) is connected to the driving member, and the driving member is connected to the sheath cap (4). The end of the extrusion member (12) away from the driving member is an extrusion end (13), and the extrusion end (13) abuts against an end surface of the hose (3). The driving member can drive the extrusion member (12) to reciprocate along the extension direction of the second channel (6) to adjust the compression amount of the hose (3) by the extrusion end (13).

2. The medical guide sheath according to claim 1, characterized in that: The driving member comprises a driving cap (5), the driving cap (5) comprises a mounting cavity (16), one end of the extrusion member (12) away from the hose (3) is connected to the top wall of the mounting cavity (16), an insertion gap (22) is provided between the extrusion member (12) and the side wall of the mounting cavity (16), one end of the sheath cap (4) away from the sheath body (1) is inserted into the insertion gap (22), and the depth of the extrusion member (12) extending into the second channel (6) is adjusted by adjusting the length of the sheath cap (4) inserted into the insertion gap (22); A fourth channel (14) is provided in the extrusion piece (12), a fifth channel (15) communicating with the fourth channel (14) is provided in the drive cap (5), and the fourth channel (14) is communicated with the third channel (10).

3. The medical guide sheath according to claim 2, characterized in that: An internal thread (17) is provided on the side wall of the installation cavity (16), an external thread (18) is provided on the outer periphery of the sheath cap (4), and the drive cap (5) is screw-assembled on the sheath cap (4).

4. The medical guide sheath according to claim 2, characterized in that: A stop platform (20) is provided on the outer periphery of the sheath body (1), and the drive cap (5) is further provided with an avoidance groove (19) and an anti-slip plate (23), wherein the avoidance groove (19) is located at one end of the installation cavity (16) close to the sheath body (1), the diameter of the avoidance groove (19) is larger than the diameter of the installation cavity (16), the anti-slip plate (23) is connected to the groove side wall of the avoidance groove (19), and the side of the anti-slip plate (23) facing the stop platform (20) is in stop cooperation with the stop platform (20).

5. The medical guide sheath according to claim 4, characterized in that: A slope (21) is provided on the side of the stop platform (20) facing away from the sheath body (1), and the slope (21) is used to guide the anti-slip plate (23) to pass over the stop platform (20).

6. The medical guide sheath according to any one of claims 2 to 5, characterized in that: The extruded member (12) is an extruded tube, and the lumen of the extruded tube forms the fourth channel (14).

7. The medical guide sheath according to any one of claims 2 to 5, characterized in that: A mounting ring (7) is provided on the channel wall of the second channel (6), and one end of the hose (3) away from the extrusion piece (12) is connected to the mounting ring (7).

8. The medical guide sheath according to claim 7, characterized in that: The mounting ring platform (7) is provided with a plug-in ring groove (8), and the end of the hose (3) away from the extrusion piece (12) is provided with a plug-in tube (11), and the plug-in tube (11) is plugged into the plug-in ring groove (8).

9. The medical guide sheath according to any one of claims 2 to 5, characterized in that: The hose (3) comprises a tube body (9) and an elastic tube (24), wherein the elastic tube (24) is arranged between the extrusion piece (12) and the tube body (9), and the extrusion end (13) abuts against the elastic tube (24).

10. The medical guide sheath according to any one of claims 2 to 5, characterized in that: The sheath cap (4) is spirally assembled on the sheath body (1).

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