Sealing valve body and guiding sheath

Abstract

The invention relates to the technical field of medical instruments, and provides a sealing valve body and a guiding sheath, the sealing valve body comprises an elastic tightening piece, a sealing piece and an adjusting sleeve, the elastic tightening piece comprises a sleeve part and a plurality of elastic extrusion parts, the sleeve part is provided with a first channel allowing an instrument to penetrate through, and the elastic extrusion parts are connected to the axial end of the sleeve part; the sleeves are arranged at intervals in the circumferential direction of the sleeve part; the sealing piece is provided with a second channel for an instrument to penetrate through, and the elastic extrusion parts are matched to clamp the sealing piece; the adjusting sleeve is movably arranged on the outer side of the elastic tightening piece in a sleeving mode, and the adjusting sleeve can drive the multiple elastic extrusion parts to extrude the sealing piece towards the center close to the sleeve part. According to the technical scheme, the sealing performance of the sealing valve body and the guiding sheath can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a sealing valve body and a guide sheath using the same. BACKGROUND

[0002] The guide sheath is a medical device used in interventional medical procedures, which is usually used to guide medical devices, catheters or drugs into the human body during surgery or treatment. In order to prevent blood loss, a sealing valve body is usually provided on the guide sheath.

[0003] The existing hemostatic valve in the sealing valve body usually adopts a silica gel hemostatic valve and a silica gel sheet. The silica gel hemostatic valve is provided with a slit hole or a cross slot hole. At the moment when the instrument passes through or is withdrawn from the hemostatic valve, the slot hole position of the hemostatic valve will be expanded. In many cases, the hemostatic valve is difficult to completely match the instrument passing through, and bleeding often occurs. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a sealing valve body that is beneficial to improve the sealing performance and a guide sheath using the same.

[0005] In order to solve the above technical problem, the present application adopts the following technical solution: In a first aspect, the present application provides a sealing valve body, comprising: an elastic tightening member, comprising a sleeve portion and a plurality of elastic extrusion portions, the sleeve portion having a first channel for an instrument to pass through, and the plurality of elastic extrusion portions being connected to one end of the sleeve portion in the axial direction and being arranged in the circumferential direction of the sleeve portion; a sealing member having a second channel for the instrument to pass through, and the plurality of elastic extrusion portions cooperating to hold the sealing member; and an adjusting sleeve movably sleeved on the outside of the elastic tightening member, the adjusting sleeve being capable of driving the plurality of elastic extrusion portions to extrude the sealing member towards the center of the sleeve portion.

[0006] In the implementation of the above technical solution, the sealing valve body includes an elastic tightening member, which includes a sleeve portion and multiple elastic squeezing portions. The sleeve portion has a first channel for instruments to pass through, allowing instruments of different radial dimensions to pass through. The multiple elastic squeezing portions are connected to one axial end of the sleeve portion and are arranged at intervals along the circumference of the sleeve portion. Thus, when force is applied to one of the elastic squeezing portions, the elastic squeezing portion can have deformation space. The sealing valve body also includes a sealing member, which has a second channel for the same instrument to pass through. The second channel can also allow instruments of different radial dimensions to pass through. The multiple elastic squeezing portions cooperate to clamp the sealing member. The second channel and the first... The channels are connected, allowing instruments to pass through the second channel and exit through the first channel. The sealing valve body also includes an adjusting sleeve, which is movably fitted onto the outside of the elastic tightening member. When instruments of different radial dimensions pass through the first and second channels, by adjusting the movement distance of the adjusting sleeve on the outside of the elastic tightening member, multiple elastic extrusion parts are driven to deform towards the center of the sleeve, causing the multiple elastic extrusion parts to compress the sealing member and then transmit the extrusion force to the sealing member and the instrument. This achieves the adjustment of the tightness between instruments of different radial dimensions and the sealing member, improves the sealing effect, and also improves the adaptability of the sealing valve body to interventional instruments of different radial dimensions.

[0007] In one embodiment, the adjusting sleeve is movably fitted onto the outer side of the sleeve portion along the axial direction of the sleeve portion; along the axial direction of the sleeve portion, the sleeve portion has a first end and a second end opposite to each other, the elastic pressing part is connected to the first end, and the adjusting sleeve is used to drive a plurality of the elastic pressing parts to press towards the center of the sleeve portion when moving in the direction from the first end to the second end.

[0008] In the process of implementing the above technical solution, the adjusting sleeve is movably fitted onto the outside of the sleeve portion along the axial direction of the sleeve portion; along the axial direction of the sleeve portion, the sleeve portion has a first end and a second end opposite to each other, and the elastic squeezing part is connected to the first end, that is, the elastic squeezing part is connected to the proximal end of the sleeve portion. The adjusting sleeve is used to drive multiple elastic squeezing parts to squeeze towards the center of the sleeve portion when moving in the direction from the first end to the second end. That is, when the sleeve portion moves towards the distal end, it can apply force to multiple elastic squeezing parts, and the multiple elastic squeezing parts apply force to squeeze the seal, which is convenient for medical staff to operate and improves the convenience of operation.

[0009] In one embodiment, the adjusting sleeve is threadedly connected to the sleeve portion.

[0010] In the process of implementing the above technical solution, the adjusting sleeve is threadedly connected to the sleeve part, thus forming a sealed connection between the adjusting sleeve and the sleeve part, which improves the sealing performance of the entire sealing valve body and prevents leakage. At the same time, the sealing adjustment of the instrument can be achieved by rotating the adjusting sleeve, improving the ease of operation.

[0011] In one embodiment, the sealing valve body further includes a fixed housing and an elastic element. The fixed housing includes a first side wall and a first end wall. Along the axial direction of the sleeve portion, the first end wall is disposed at one end of the first side wall and is located on the side of the sleeve portion away from the elastic compression portion. The elastic element is disposed between the first end wall and the sleeve portion. The adjusting sleeve is threadedly connected to the first side wall.

[0012] In the process of implementing the above technical solution, when the instrument passes through the seal, there will be friction between it and the seal. Since the seal is a flexible body, it has the elastic property of axial tension. As the length of the instrument increases, the seal will be stretched toward the distal end during the insertion process. Since multiple elastic extrusion parts cooperate to clamp the seal, when the seal is stretched toward the distal end, it will also drive the elastic tightening part to move toward the distal end, which will squeeze the elastic part. This allows the sealing valve body in the embodiment of this application to allow instruments with larger radial dimensions to pass through, based on the case of instruments of conventional size.

[0013] In one embodiment, the first sidewall is arranged around the outside of the adjusting sleeve, the first sidewall is provided with an internal thread, and the adjusting sleeve is provided with an external thread that mates with the internal thread.

[0014] In the process of implementing the above technical solution, the first sidewall is arranged around the outside of the adjusting sleeve. The first sidewall is provided with an internal thread, and the adjusting sleeve is provided with an external thread that matches the internal thread. On the one hand, a sealed connection is formed between the adjusting sleeve and the fixed shell, thereby improving the sealing performance of the entire sealing valve body and preventing leakage. On the other hand, it is convenient for medical staff to hold the fixed shell, and the adjusting sleeve will not touch the hand of the medical staff holding the fixed shell during the rotation of the adjusting sleeve, thus improving the convenience of operation.

[0015] In one embodiment, the sleeve portion includes a second end wall spaced apart from the first end wall. The second end wall is provided with a first through hole through which a sheath tube can pass. The first end wall is provided with a second through hole through which the same sheath tube can pass. The first through hole includes a first portion that cooperates with a positioning protrusion on the outer peripheral surface of the sheath tube. The second through hole includes a second portion that cooperates with a positioning protrusion on the outer peripheral surface of the sheath tube.

[0016] In the implementation of the above technical solution, since the first part and the second part are respectively positioned and connected with the positioning protrusions on the outer circumference of the sheath, the positions of the fixed shell, the elastic tightening member and the sheath are fixed to each other, thereby preventing the friction between the adjusting sleeve and the elastic tightening member from causing the elastic tightening member to rotate synchronously when they are squeezed.

[0017] In one embodiment, the seal is provided with a first annular groove surrounding the first channel; the elastic compression part includes a main body section and an extension section, one end of the main body section is connected to the sleeve section, the other end of the main body section is connected to the extension section, the extension section extends from the main body section toward the axis of the sleeve section, and the extension section is engaged with the first annular groove.

[0018] In the process of implementing the above technical solution, the elastic extrusion part includes a main body section and an extension section. One end of the main body section is connected to the sleeve section, and the other end of the main body section is connected to the extension section. The extension section extends from the main body section toward the axis close to the sleeve section. The extension section is engaged in the first annular groove. Thus, when the adjusting sleeve moves to the distal end, since the extension section extends from the main body section toward the axis close to the sleeve section, when the adjusting sleeve contacts the main body section, as the adjusting sleeve gradually moves to the distal end, the force applied by the adjusting sleeve to the main body section is transmitted to the extension section. The extension section is engaged in the first annular groove and then applies force to the seal. When the instrument passes through the seal, the sealing between the adjusting instrument and the seal is adjusted.

[0019] In one implementation, the main body segment is inclined, and the end of the main body segment connected to the extension segment is closer to the axis of the sleeve portion than the end of the main body segment connected to the sleeve portion.

[0020] In the process of implementing the above technical solution, the main body section is inclined, and the end of the main body section connected to the extension section is closer to the axis of the sleeve section than the end of the main body section connected to the sleeve section. In this way, multiple main body sections are in a state of convergence along the circumference of the sleeve section. When the adjusting sleeve moves toward the far end, it is convenient to abut against the main body section. As the adjusting sleeve continues to rotate, it can further adjust the force applied by the extension section to the sealing element, thereby improving the sealing performance.

[0021] In one embodiment, the adjusting sleeve has a central hole, which includes a first hole segment and a second hole segment connected in sequence. The diameter of the first hole segment is larger than the diameter of the second hole segment. At least a portion of the sleeve portion is accommodated in the first hole segment, and at least a portion of the elastic compression portion is accommodated in the second hole segment.

[0022] In the process of implementing the above technical solution, the adjusting sleeve has a central hole, which includes a first hole segment and a second hole segment connected in sequence. The diameter of the first hole segment is larger than the diameter of the second hole segment. At least a portion of the sleeve portion is accommodated in the first hole segment, and at least a portion of the elastic extrusion portion is accommodated in the second hole segment. Since the diameter of the first hole segment is larger than the diameter of the second hole segment, the central hole of the adjusting sleeve has a stepped structure. When moving, the peripheral wall of the second hole segment can extrude the elastic extrusion portion, thereby extruding the seal.

[0023] In one embodiment, the central hole includes a threaded hole section that communicates with a second hole section. The diameter of the second hole section is larger than the diameter of the threaded hole section. At least a portion of the seal passes through the threaded hole section. The seal is provided with a second annular groove that surrounds the first channel. The second sidewall of the second annular groove, which extends axially, has an external thread that is threadedly connected to the threaded hole section.

[0024] In the process of implementing the above technical solution, by setting the threaded hole section and the second side wall having external threads, the adjusting sleeve can move in the axial direction of the second side wall, and the threaded engagement between the threaded hole section and the external threads can play a sealing role in the center hole, thereby preventing blood or negative pressure from leaking from the position of the threaded hole section.

[0025] In one embodiment, the seal includes a main body and a third limiting portion extending radially along the main body. The third limiting portion is spaced apart from the second limiting portion to define a second annular groove, and the adjusting sleeve is axially movable along the second annular groove.

[0026] In the process of implementing the above technical solution, the third limiting part and the second limiting part are spaced apart to define the second annular groove, so that the bottom wall of the adjusting sleeve is located in the second annular groove, and the third limiting part axially limits the adjusting sleeve, so that the adjusting sleeve can move axially along the second annular groove.

[0027] In one embodiment, the first end wall is provided with a first positioning part for positioning and connecting with the elastic element, and the sleeve part is also provided with a second positioning part on the side facing the first end wall, and the second positioning part is positioned and connected with the elastic element.

[0028] In the process of implementing the above technical solution, a first positioning part is provided on the first end wall for positioning and connecting with the elastic element, and a second positioning part is provided on the side of the sleeve part facing the first end wall. One end of the elastic element can be positioned and connected with the first positioning part, and the other end of the elastic element can be positioned and connected with the second positioning part. The first positioning part and the second positioning part can improve the stability of the elastic element.

[0029] Secondly, this application also provides a guide sheath, including a sealing valve body provided in the first aspect and a sheath tube connected to the distal end of the sealing valve body. The sheath tube passes through a first through hole at the distal end of an elastic tightening member. The sheath tube includes a fixing portion located at the proximal end. The fixing portion extends radially along the first through hole. The fixing portion is located within a first channel and is fixedly connected to the elastic tightening member.

[0030] In the process of implementing the above technical solution, the sheath tube includes a fixed part located at the proximal end and is located in the first channel, which can increase the contact area with the elastic tightening member, thereby improving the stability between the sheath tube and the elastic tightening member. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the sealing valve body provided in the first embodiment of this application; Figure 2 This is an exploded structural diagram of the sealing valve body provided in the first embodiment of this application; Figure 3 Exploded structural diagrams of the sealing valve body from different perspectives provided in the first embodiment of this application; Figure 4 An exploded structural diagram of the sealing valve body from another perspective, provided for the first embodiment of this application; Figure 5 This is a side view of the sealing valve body provided in the first embodiment of this application; Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure along the AA direction; Figure 7 This is a schematic diagram of the structure of the sealing valve body provided in the second embodiment of this application; Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure along the AA direction; Figure 9 This is an exploded structural diagram of the sealing valve body provided in the second embodiment of this application; Figure 10 Exploded structural diagrams of the sealing valve body from different perspectives provided in the second embodiment of this application; Figure 11 This is a schematic diagram of the exploded structure of the sealing valve body from another perspective, provided for the second embodiment of this application.

[0033] Icons: 1-Elastic tightening element; 11-Sleeve section; 111-Second end wall; 12-Elastic compression section; 121-Main body section; 122-Extension section; 2-Seal; 21-First annular groove; 22-First limiting section; 23-Second limiting section; 24-Third limiting section; 25-Second annular groove; 3-Adjusting sleeve; 31-First hole section; 32-Second hole section; 33-Threaded hole section; 34-Third side wall; 35-Bottom wall; 36-Force application section; 4-Fixed outer shell; 41-First side wall; 42-First end wall; 421-Second through hole; 422-Second part; 423-First positioning part; 5-Elastic element; 6-Sheath tube; 61-Positioning protrusion; 62-Fixing part. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0035] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, the term "distal" refers to the end of the delivery system closer to the heart tissue, and "proximal" refers to the end of the delivery system closer to the operator. The terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0036] In the first aspect, embodiments of this application provide a sealing valve body applied to a guide sheath. When a device passes through the sealing valve body, the sealing valve body can be tightened in time and cover the peripheral wall of the device to seal it in time, preventing blood from seeping in. Moreover, the sealing valve body can adaptively adjust the tightening force according to the diameter of the device passing through, so as to achieve effective sealing.

[0037] like Figure 1 , 2As shown in Figures 3, 6, 7, 8, and 9, embodiments of this application provide a sealing valve body, including an elastic tightening member 1. The elastic tightening member 1 includes a sleeve portion 11 and a plurality of elastic squeezing portions 12. The sleeve portion 11 has a first channel for instruments to pass through, allowing instruments of different radial dimensions to pass through. The plurality of elastic squeezing portions 12 are connected to one end of the sleeve portion 11 in the axial direction and are arranged at intervals along the circumference of the sleeve portion 11. Thus, when force is applied to one of the elastic squeezing portions 12, the elastic squeezing portion 12 can have deformation space. The sealing valve body also includes a sealing member 2, which has a second channel for the same instrument to pass through, also allowing instruments of different radial dimensions to pass through. The plurality of elastic squeezing portions 12... With the clamping seal 2, the second channel is connected to the first channel, so that the instrument can pass through the second channel and exit through the first channel. The sealing valve body also includes an adjusting sleeve 3, which is movably fitted on the outside of the elastic tightening member 1. When instruments of different radial dimensions pass through the first and second channels, by adjusting the movement distance of the adjusting sleeve 3 on the outside of the elastic tightening member 1, multiple elastic squeezing parts 12 are driven to squeeze the seal 2 towards the center of the sleeve part 11, and then the squeezing force is transmitted to the seal 2 and the instrument. This achieves the adjustment of the tightness between the instrument of different radial dimensions and the seal 2, improves the sealing effect, and also improves the adaptability of the sealing valve body to interventional instruments of different radial dimensions.

[0038] Optionally, in this embodiment, the reason why the sealing member 2 is squeezed by multiple elastic squeezing parts 12 instead of the elastic squeezing part 12 directly contacting the instrument is that the elastic squeezing part 12 needs a deformation space to achieve elastic deformation. If there is a deformation space, there will be a gap. If the elastic squeezing part 12 directly squeezes the instrument, the sealing effect is not ideal. The sealing member 2 can provide a second channel for the instrument to pass through and can also achieve a sealed connection with the adjusting sleeve 3. like Figure 6 and 8 As shown, optionally, multiple elastic extrusion parts 12 are connected to the proximal end of the sleeve part 11, and the multiple elastic extrusion parts 12 constitute the extrusion section of the elastic tightening member 1. The cross section of the extrusion section is gradually reduced from the far end to the proximal end, that is, the extrusion section is a frustum structure. This makes it easy to adjust the sleeve 3 and the elastic tightening member 1 and to apply force to the extrusion section.

[0039] Optionally, the device may be a catheter for delivering implants or repairing endovascular tissue, a guidewire, or a delivery sheath for valves and peripheral vascular interventional treatment products.

[0040] Optionally, the sealing valve body in this embodiment can be applied in fields involving interventional surgery, such as heart valve replacement, repair, peripheral intervention, and gastrointestinal intervention, thereby improving the applicability of the product.

[0041] Optionally, the elastic tightening element 1 and the adjusting sleeve 3 can be plastic parts, and the sealing element 2 can be a rubber part or a silicone part.

[0042] Optionally, the plurality of elastic compression portions 12 may be deformed in a direction close to the axis of the sleeve portion 11, so that the plurality of elastic compression portions 12 compress the seal 2.

[0043] like Figure 2 , 6 As shown in Figure 9, in one embodiment, the adjusting sleeve 3 is movably fitted onto the outside of the sleeve portion 11 along the axial direction of the sleeve portion 11. Along the axial direction of the sleeve portion 11, the sleeve portion 11 has a first end and a second end opposite to each other. The elastic compression portion 12 is connected to the first end, that is, the elastic compression portion 12 is connected to the proximal end of the sleeve portion 11. The adjusting sleeve 3 is used to drive multiple elastic compression portions 12 to compress towards the center of the sleeve portion 11 when moving in the direction from the first end to the second end. That is, when the sleeve portion 11 moves toward the distal end, it can apply force to multiple elastic compression portions 12, and the multiple elastic compression portions 12 apply force to the seal 2, which is convenient for medical staff to operate and improves the convenience of operation.

[0044] Optionally, the first end of the sleeve portion 11 is the proximal end of the sleeve portion 11, and the second end is the distal end of the sleeve portion 11.

[0045] like Figures 2 to 6 As shown, in one embodiment, the adjusting sleeve 3 is threadedly connected to the sleeve portion 11, thus forming a sealed connection between the adjusting sleeve 3 and the sleeve portion 11, thereby improving the sealing performance of the entire sealing valve body and preventing leakage. At the same time, the sealing adjustment of the instrument can be achieved by rotating the adjusting sleeve 3, improving the ease of operation.

[0046] Optionally, the outer peripheral wall of the sleeve portion 11 has external threads, and the inner peripheral wall of the adjusting sleeve 3 has internal threads.

[0047] Optionally, medical staff can hold the adjusting sleeve 3 and the sleeve part 11 separately to prevent the sleeve part 11 from rotating synchronously when the adjusting sleeve 3 is rotated; of course, the sleeve part 11 can also be held to prevent it from rotating.

[0048] like Figures 7 to 11As shown, in one embodiment, the sealing valve body further includes a fixed outer shell 4 and an elastic element 5. The fixed outer shell 4 includes a first side wall 41 and a first end wall 42. Along the axial direction of the sleeve portion 11, the first end wall 42 is disposed at one end of the first side wall 41 and is located on the side of the sleeve portion 11 away from the elastic compression portion 12. The elastic element 5 is disposed between the first end wall 42 and the sleeve portion 11. Since the inserted instrument is generally interference-fitted with the sealing element 2, there will be friction between the instrument and the sealing element 2 when the instrument passes through the sealing element 2. Since the sealing element 2 is a flexible body, it has axial tensile elastic properties. As the length of the inserted instrument increases, the sealing element 2 will be stretched toward the distal end during the insertion process. Since multiple elastic compression portions 12 cooperate to clamp the sealing element 2, when the sealing element 2 is stretched toward the distal end, it will also drive the elastic tightening member 1 to move toward the distal end, thereby squeezing the elastic element 5. This makes the sealing valve body in this embodiment based on the conventional size of the inserted instrument... In the case of mechanical devices, instruments with a larger radial dimension can also be introduced. Because the friction between the instrument with a larger radial dimension and the seal 2 will increase, it will also cause the seal 2 to stretch, causing the elastic tightening element 1 to move further away from the adjusting sleeve 3 to compress the elastic element 5. The adjusting sleeve 3 is threadedly connected to the first side wall 41. In this way, when the adjusting sleeve 3 rotates relative to the first side wall 41, it can drive multiple elastic extrusion parts 12 to deform in the direction close to the axis of the sleeve part 11, so that the multiple elastic extrusion parts 12 extrude the seal 2, and then transmit the extrusion force to the seal 2 and the instrument. This achieves the adjustment of the tightness between the instrument with different radial dimensions and the seal 2, improves the sealing effect, and also improves the adaptability of the sealing valve body to intervention instruments with different radial dimensions. In addition, the threaded connection between the adjusting sleeve 3 and the first side wall 41 also achieves a sealed connection between the adjusting sleeve 3 and the fixed outer shell 4, thereby improving the sealing performance of the entire sealing valve body and preventing leakage.

[0049] like Figure 9 and 10 As shown, optionally, the first end wall 42 is located at the distal end of the first side wall 41.

[0050] Optionally, the elastic element 5 can be a spring, and multiple elastic elements 5 can be provided to provide a stable elastic compressive force.

[0051] Optionally, the inner circumferential wall of the adjusting sleeve 3 may fit tightly against the outer circumferential surface of the sleeve portion 11, or it may not fit tightly against it.

[0052] like Figure 8 and 10As shown, in one embodiment, the first sidewall 41 is arranged around the outside of the adjusting sleeve 3. The first sidewall 41 is provided with an internal thread, and the adjusting sleeve 3 is provided with an external thread that matches the internal thread. On the one hand, a sealed connection is formed between the adjusting sleeve 3 and the fixed housing 4, thereby improving the sealing performance of the entire sealing valve body and preventing leakage. On the other hand, it is convenient for medical staff to hold the fixed housing 4, and the adjusting sleeve 3 will not touch the hand of the medical staff holding the fixed housing 4 during the rotation of the adjusting sleeve 3, thus improving the convenience of operation.

[0053] Optionally, medical staff can hold the adjusting sleeve 3 and the fixed outer shell 4 separately to prevent the fixed outer shell 4 from rotating synchronously when the adjusting sleeve 3 is rotated; of course, the fixed outer shell 4 can also be fixed to prevent it from rotating.

[0054] Optionally, in some cases, the fixed housing 4 may also be provided with external threads, and the adjusting sleeve 3 may be provided with internal threads, that is, the adjusting sleeve 3 is located on the outside of the first side wall 41.

[0055] like Figures 8 to 11 As shown, in one embodiment, the sleeve portion 11 includes a second end wall 111 spaced apart from the first end wall 42. The second end wall 111 is provided with a first through hole through which the sheath tube 6 can pass. The first end wall 42 is provided with a second through hole 421 through which the same sheath tube 6 can pass. The first through hole includes a first part that cooperates with a positioning protrusion 61 on the outer peripheral surface of the sheath tube 6. The second through hole 421 includes a second part 422 that cooperates with a positioning protrusion 61 on the outer peripheral surface of the sheath tube 6. With the above arrangement, since the first part and the second part 422 are respectively positioned and connected with the positioning protrusion 61 on the outer peripheral surface of the sheath tube 6, the positions of the fixed outer shell 4, the elastic tightening member 1 and the sheath tube 6 are fixed to each other, thereby preventing the friction between the adjusting sleeve 3 and the elastic tightening member 1 from causing the elastic tightening member 1 to rotate synchronously when the adjusting sleeve 3 is squeezed against the elastic tightening member 1.

[0056] Optionally, the first through hole also includes a third part communicating with the first part, the radial dimension of the third part being adapted to the radial dimension of the sheath 6 for the sheath 6 to pass through; the second through hole 421 also includes a fourth part communicating with the second part, the radial dimension of the fourth part being adapted to the radial dimension of the sheath 6 for the same sheath 6 to pass through.

[0057] like Figure 8 and 11 As shown, optionally, the positioning protrusion 61 can be at least one elongated protrusion, and the same elongated protrusion can be positioned with the first part and the second part 422 respectively. That is to say, the first part and the second part 422 can be coaxial; of course, the second part 422 and the first part can also be non-coaxial, and can be positioned and connected with multiple positioning protrusions 61 respectively.

[0058] Optionally, the first part and the second part 422 can be semi-circular or quadrilateral, etc., and their shapes are adapted to the positioning protrusion 61.

[0059] like Figure 2 and 3 As shown in Figures 6 and 8, in one embodiment, the sealing element 2 is provided with a first annular groove 21, which surrounds the first channel; the elastic compression part 12 includes a main body section 121 and an extension section 122. One end of the main body section 121 is connected to the sleeve part 11, and the other end of the main body section 121 is connected to the extension section 122. The extension section 122 extends from the main body section 121 toward the axis of the sleeve part 11 and is engaged in the first annular groove 21. Thus, when the adjusting sleeve 3 moves to the distal end, since the extension section 122 extends from the main body section 121 toward the axis of the sleeve part 11, when the adjusting sleeve 3 contacts the main body section 121, as the adjusting sleeve 3 gradually moves to the distal end, the force applied by the adjusting sleeve 3 to the main body section 121 is transmitted to the extension section 122. The extension section 122 is engaged in the first annular groove 21 and then applies force to the sealing element 2. When the instrument passes through the sealing element 2, the sealing between the instrument and the sealing element 2 is adjusted.

[0060] Optionally, the extension 122 extends inward in the radial direction of the sleeve portion 11.

[0061] like Figure 6 and 8 As shown, in one embodiment, the main body segment 121 is inclined, and the end of the main body segment 121 connected to the extension segment 122 is closer to the axis of the sleeve portion 11 than the end of the main body segment 121 connected to the sleeve portion 11. In this way, the multiple main body segments 121 are in a contracted state along the circumference of the sleeve portion 11. When the adjusting sleeve 3 moves toward the far end, it is convenient to abut against the main body segment 121. As the adjusting sleeve 3 continues to rotate, the force applied by the extension segment 122 to the sealing element 2 can be further adjusted, thereby improving the sealing performance.

[0062] like Figure 6 and 8 As shown, in one embodiment, the adjusting sleeve 3 has a central hole, which includes a first hole segment 31 and a second hole segment 32 connected in sequence. The diameter of the first hole segment 31 is larger than the diameter of the second hole segment 32. At least a portion of the sleeve portion 11 is accommodated in the first hole segment 31, and at least a portion of the elastic pressing portion 12 is accommodated in the second hole segment 32. Since the diameter of the first hole segment 31 is larger than the diameter of the second hole segment 32, the central hole of the adjusting sleeve 3 has a stepped structure. When moving, the peripheral wall of the second hole segment 32 can press the elastic pressing portion 12, thereby causing the elastic pressing portion 12 to press the sealing member 2.

[0063] Optionally, the first aperture segment 31 is located near the end of the second aperture segment 32.

[0064] Optionally, the second hole section 32 may not abut against the main body section 121 when the sealing is not adjusted, or it may abut against the main body section 121.

[0065] like Figure 2 , 3 As shown in Figures 6, 8, 9, and 10, in one embodiment, the central hole includes a threaded hole section 33, which is connected to a second hole section 32. The diameter of the second hole section 32 is larger than the diameter of the threaded hole section 33. At least a portion of the sealing member 2 passes through the threaded hole section 33. The sealing member 2 is provided with a second annular groove 25, which surrounds the first channel. The second sidewall of the second annular groove 25, which extends axially, has an external thread. The external thread is threadedly connected to the threaded hole section 33. By providing the threaded hole section 33 and the external thread on the second sidewall, the adjusting sleeve 3 can move axially along the second sidewall. The threaded engagement between the threaded hole section 33 and the external thread can seal the central hole, thereby preventing blood or negative pressure from leaking from the location of the threaded hole section 33.

[0066] like Figure 3 and 10 As shown, optionally, the adjusting sleeve 3 includes a third sidewall 34 and a bottom wall 35. The bottom wall 35 is provided with a threaded hole section 33, and the third sidewall 34 has a first hole section 31 and a second hole section 32.

[0067] like Figure 3 , 8 As shown in Figure 9, in one embodiment, the sealing member 2 includes a second limiting portion 23 and a third limiting portion 24 extending in the radial direction of the main body. The third limiting portion 24 is spaced apart from the second limiting portion 23 to define a second annular groove 25, such that the bottom wall 35 of the adjusting sleeve 3 is located in the second annular groove 25. The third limiting portion 24 axially limits the adjusting sleeve 3, so that the adjusting sleeve 3 can move axially along the second annular groove 25.

[0068] like Figure 3 As shown, optionally, the seal 2 also includes a first limiting portion 22 extending in the radial direction of the main body, the first limiting portion 22 and the second limiting portion 23 being spaced apart to form a first annular groove 21, and the second limiting portion 23 being located at the distal end of the first limiting portion 22; the adjusting sleeve 3 includes a force-applying portion 36 extending inward in the radial direction of the second channel, the force-applying portion 36 being able to apply force to compress the elastic tightening member 1.

[0069] Optionally, the main body extends axially and has a second channel.

[0070] like Figure 6 As shown, optionally, the circumferentially protruding force-applying portion 36 forms a second hole segment 32.

[0071] like Figure 10As shown, in one embodiment, the first end wall 42 is provided with a first positioning part 423 for positioning and connecting with the elastic member 5, and the sleeve part is also provided with a second positioning part on the side facing the first end wall 42. One end of the elastic member 5 can be positioned and connected with the first positioning part 423, and the other end of the elastic member 5 can be positioned and connected with the second positioning part. The first positioning part 423 and the second positioning part can improve the stability of the elastic member 5.

[0072] Optionally, a plurality of first positioning parts 423 may be provided on the side of the first end wall 42 facing the elastic tightening member 1. The first positioning part 423 may be a positioning post or a positioning groove. A plurality of second positioning parts may be provided on the end of the sleeve facing the first end wall 42. The second positioning parts may also be positioning posts or positioning grooves. The number of the first positioning parts 423, the second positioning parts and the elastic member 5 are in one-to-one correspondence.

[0073] Optionally, the second end wall 111 is disposed opposite to the first end wall 42, and the second end wall 111 is provided with a plurality of second positioning parts.

[0074] like Figure 6 As shown, in a second aspect, embodiments of this application also provide a guide sheath, including the sealing valve body provided in the first aspect; it also includes a sheath tube 6, which passes through a first through hole at the distal end of the elastic tightening member 1, and the proximal end of the sheath tube 6 also includes a fixing part 62, which extends radially along the first through hole and can increase the contact area with the elastic tightening member 1. The fixing part 62 is located in the first channel and is connected to the second end wall 111 of the elastic tightening member 1, thereby improving the stability of the sheath tube 6 and the elastic tightening member 1.

[0075] Optionally, the fixing part 62 can be connected to the elastic tightening member 1 by adhesive bonding or heat fusion to improve the sealing performance between the sheath tube 6 and the elastic tightening member 1.

[0076] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0077] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A sealing valve body, characterized in that, include: An elastic tightening member includes a sleeve portion and a plurality of elastic compression portions. The sleeve portion has a first channel for an instrument to pass through. The plurality of elastic compression portions are connected to one axial end of the sleeve portion and are arranged at intervals along the circumferential direction of the sleeve portion. A seal having a second channel through which the instrument passes, and a plurality of the resilient compression portions cooperating to clamp the seal; An adjusting sleeve is movably fitted onto the outside of the elastic tightening member, and the adjusting sleeve can drive multiple elastic pressing parts to press the seal member toward the center of the sleeve portion.

2. The sealing valve body according to claim 1, characterized in that, The adjusting sleeve is movably fitted onto the outer side of the sleeve portion along the axial direction of the sleeve portion; Along the axial direction of the sleeve portion, the sleeve portion has a first end and a second end opposite to each other, the elastic extrusion portion is connected to the first end, and the adjusting sleeve is used to drive a plurality of the elastic extrusion portions to extrude toward the center of the sleeve portion when moving in a direction from the first end to the second end.

3. The sealing valve body according to claim 2, characterized in that, The adjusting sleeve is threadedly connected to the sleeve portion.

4. The sealing valve body according to claim 2, characterized in that, The sealing valve body includes a fixed outer shell and an elastic element. The fixed outer shell includes a first side wall and a first end wall. Along the axial direction of the sleeve portion, the first end wall is disposed at one end of the first side wall and is located on the side of the sleeve portion away from the elastic compression portion. The elastic element is disposed between the first end wall and the sleeve portion. The adjusting sleeve is threadedly connected to the first side wall.

5. The sealing valve body according to claim 4, characterized in that, The first sidewall is arranged around the outside of the adjusting sleeve, and the first sidewall is provided with an internal thread. The adjusting sleeve is provided with an external thread that mates with the internal thread.

6. The sealing valve body according to claim 4, characterized in that, The sleeve portion includes a second end wall spaced apart from the first end wall. The second end wall is provided with a first through hole through which the sheath tube can pass. The first end wall is provided with a second through hole through which the same sheath tube can pass. The first through hole includes a first part that cooperates with a positioning protrusion on the outer peripheral surface of the sheath tube. The second through hole includes a second part that cooperates with a positioning protrusion on the outer peripheral surface of the sheath tube.

7. The sealing valve body according to any one of claims 1 to 6, characterized in that, The sealing element is provided with a first annular groove, which surrounds the first channel. The elastic compression section includes a main body section and an extension section. One end of the main body section is connected to the sleeve section, and the other end of the main body section is connected to the extension section. The extension section extends from the main body section toward the axis of the sleeve section and is engaged with the first annular groove.

8. The sealing valve body according to claim 7, characterized in that, The main body segment is inclined, and the end of the main body segment connected to the extension segment is closer to the axis of the sleeve portion than the end of the main body segment connected to the sleeve portion.

9. The sealing valve body according to claim 8, characterized in that, The adjusting sleeve has a central hole, which includes a first hole segment and a second hole segment connected in sequence. The diameter of the first hole segment is larger than the diameter of the second hole segment. At least a portion of the sleeve portion is accommodated in the first hole segment, and at least a portion of the elastic compression portion is accommodated in the second hole segment.

10. The sealing valve body according to claim 9, characterized in that, The central hole includes a threaded hole section, which is connected to the second hole section. The diameter of the second hole section is larger than the diameter of the threaded hole section, and at least a portion of the seal passes through the threaded hole section. The seal is provided with a second annular groove, which surrounds the first channel. The second sidewall of the second annular groove, which extends axially, has an external thread, which is threaded to the threaded hole section.

11. The sealing valve body according to claim 10, characterized in that, The sealing element includes a main body and a second limiting part and a third limiting part extending radially along the main body. The third limiting part is spaced apart from the second limiting part to define a second annular groove. The adjusting sleeve is axially movable along the second annular groove.

12. The sealing valve body according to any one of claims 4 to 6, characterized in that, The first end wall is provided with a first positioning part for positioning and connecting with the elastic element, and the sleeve part is also provided with a second positioning part on the side facing the first end wall, and the second positioning part is positioned and connected with the elastic element.

13. A guiding sheath, characterized in that, Includes the sealing valve body as described in any one of claims 1 to 12; A sheath tube, passing through a first through hole at the distal end of an elastic tightening member, the sheath tube including a fixing portion at the proximal end, the fixing portion extending radially along the first through hole, the fixing portion being located within a first channel and fixedly connected to the elastic tightening member.

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