Sealing valve body and guiding sheath

Abstract

The invention provides a sealing valve body and a guiding sheath. The sealing valve body comprises a base body, a first valve element arranged in the base body, an adjusting piece assembled on the base body and capable of moving relative to the base body and a force transmission piece. The base body is provided with a first containing space, and the first valve element is located in the first containing space. The first valve element comprises two fixed ends fixed to the base body and a connecting section located between the two fixed ends. The force transmission piece comprises a first split body and a second split body which are arranged on the two opposite sides of the connecting section, at least two first protruding teeth are arranged on the side, facing the connecting section, of the first split body, and a groove is formed between every two adjacent first protruding teeth. The second split body is provided with second convex teeth towards the concave pit; the adjusting piece comprises a force application part capable of applying force to the force transmission piece, and the force application part extrudes the force transmission piece to enable the second convex teeth to extrude the connecting section towards the concave pit. The tightness between an instrument penetrating through the first valve element and the first valve element is adjusted in a self-adaptive mode, and the sealing effect of the sealing valve body is improved.

Description

Technical Field

[0001] The present application relates to the technical field of interventional medical devices, and in particular to a sealing valve body and a guide sheath of an interventional guide sheath. Background Art

[0002] Introducer sheaths are commonly used in invasive medical devices. They typically puncture blood vessels to establish an access channel. A sealing valve is used at the proximal end of the introducer sheath to prevent blood loss.

[0003] Existing hemostatic sealing methods typically involve creating a slotted or cross-shaped hole in a silicone hemostatic valve sheet to allow the delivery system to pass through. The hemostatic valve sheet then compresses the delivery system through its own elastic contraction, creating a seal. However, the silicone sheet used in these sealing methods cannot be adjusted, making it difficult to adapt to delivery systems of varying radial dimensions. Summary of the Invention

[0004] The technical problem to be solved by the present application is to provide a sealing valve body that can be adjusted according to the size of an interventional instrument and a guide sheath using the sealing valve body.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions: In the first aspect, the present application provides a sealing valve body, including a base, a first valve core arranged in the base, an adjusting member and a force transmission member assembled on the base and movable relative to the base; the base has a first accommodating space, and the first valve core is located in the first accommodating space; the first valve core includes two fixed ends fixed to the base and a connecting section located between the two fixed ends, and the first valve core is provided with a first channel running through the two fixed ends and the connecting section; the force transmission member includes a first split body and a second split body arranged on opposite sides of the connecting section, the first split body is provided with at least two first protruding teeth facing the side of the connecting section, and a recess is formed between two adjacent first protruding teeth; the second split body is provided with a second protruding tooth facing the recess; the adjusting member includes a force applying part that can apply force to the force transmission member, and when the adjusting member moves relative to the base, the force applying part squeezes the force transmission member so that the second protruding teeth squeeze the connecting section toward the recess.

[0006] In the process of implementing the above technical solution, the sealing valve body includes a base and a first valve core arranged in the base; it also includes an adjusting member and a force transmitting member assembled on the base and capable of moving relative to the base; the base has a first accommodating space, the first valve core is located in the first accommodating space, the first valve core includes two fixed ends relatively fixed to the base, which can improve the stability between the first valve core and the base, reduce the shaking of the base, and improve the success rate of the operation; the first valve core also includes a connecting section located between the two fixed ends, the first valve core is provided with a first channel running through the two fixed ends and the connecting section, and the first channel can allow instruments of different radial sizes to pass through; the force transmitting member is also located in the first accommodating space and can be squeezed and connected The force transmission member includes a first split body and a second split body, and the first split body and the second split body are on opposite sides of the connecting segment, so that the extrusion force generated is from two opposite directions of the connecting segment, thereby improving the sealing effect between the instrument and the connecting segment; the first split body is provided with at least two first convex teeth protruding toward the connecting segment, and a recess is formed between two adjacent first convex teeth; the second split body is provided with a second convex tooth toward the recess, and the adjusting member includes a force applying portion capable of applying force to the force transmission member. When the adjusting member moves relative to the base, the force applying portion on the adjusting member can form a resisting force on the connecting segment through the first split body and the second split body. At the same time, the staggered first convex teeth and the second convex teeth can generate a bite force on the connecting segment to improve the sealing between the connecting segment and the instrument; In addition, when instruments of different radial sizes pass through the connecting section, the tightness between the instruments of different radial sizes and the connecting section can be adjusted by adjusting the movement distance of the adjusting member to adapt to it, thereby improving the sealing effect and the adaptability of the sealing valve body to interventional instruments of different radial sizes.

[0007] As an embodiment, the first split body and the second split body are respectively provided with corresponding extrusion grooves, the connecting section is located in the extrusion grooves, and the first protruding teeth and the second protruding teeth are respectively arranged in the extrusion grooves.

[0008] In the process of implementing the above technical solution, the first split body and the second split body are respectively provided with corresponding extrusion grooves, the extrusion grooves are adapted to the connecting section, the connecting section is located in the extrusion grooves, and the first protruding teeth and the second protruding teeth are respectively arranged in the extrusion grooves. When the first split body and the second split body press against the connecting section, the first protruding teeth and the second protruding teeth can directly contact the connecting section, which can further improve the sealing effect between the force transmission member and the connecting section.

[0009] As an embodiment, the radial dimension of the connecting section is smaller than the radial dimension of the two fixed end portions, and the first protruding teeth and the second protruding teeth are respectively in contact with the connecting section.

[0010] In the process of implementing the above technical solution, the radial dimension of the connecting section is smaller than the radial dimension of the two fixed end portions, that is, the radial dimension of the fixed end portions is gradually increased in the direction away from the connecting section. In this way, when the first protruding tooth and the second protruding tooth are respectively abutted against the position of the connecting section, no additional space is occupied, thereby improving space utilization, and being able to provide accommodation space and deformation space for the first split body and the second split body. At the same time, when the adjusting member moves toward the distal end, it is easier for the force-applying portion to squeeze the connecting section through the first split body and the second split body, thereby making it easier to adjust the sealing effect between the connecting section and the instrument.

[0011] As an embodiment, a deformable hole is provided on the first sub-body and / or the second sub-body.

[0012] In the process of implementing the above technical solution, the first split body and / or the second split body is provided with a deformable hole, which can play a buffering role when the first split body and / or the second split body are deformed.

[0013] As an embodiment, the first split body and the second split body include a pressing piece for pressing the connecting section and a pushing piece bent and extended from the pressing piece, respectively, and the force-applying portion of the adjusting member can be in contact with the pushing piece.

[0014] In the process of implementing the above technical solution, the first split body and the second split body include a pressure piece for pressing the connecting section and a pushing piece bent and extended from the pressure piece, respectively. The force-applying part of the adjusting member can abut against the pushing piece. In this way, during the adjustment process of the adjusting member, the force-applying part abuts against the pushing piece. Since the pressure piece and the pushing piece are connected to each other, the abutting force on the pushing piece can be transmitted to the pressure piece, and the pressure piece presses the connecting section to realize the sealing adjustment between the connecting section and the instrument; at the same time, the first split body and the second split body are sheet-like structures, which can increase the contact area with the connecting section and improve the sealing effect.

[0015] As an embodiment, the base includes a distal positioning portion and a proximal positioning portion, and the two fixed ends of the first valve core are respectively fixed to the distal positioning portion and the proximal positioning portion; the distal positioning portion is provided with a wing extending toward the proximal direction, and the wing is provided with an external thread; the adjusting member is provided with an internal thread matching the external thread, and the adjusting member is rotated relative to the wing so as to be movable in the axial direction.

[0016] In the process of implementing the above technical solution, the base includes a distal positioning part and a proximal positioning part, and the two fixed ends of the first valve core are respectively fixed to the distal positioning part and the proximal positioning part, thereby improving the stability between the base and the first valve core; the distal positioning part is provided with a wing extending in the proximal direction, and the wing is provided with an external thread; the adjusting member is provided with an internal thread matching the external thread, and the adjusting member is matched with the wing thread, and can be rotated relative to the wing so as to move in the axial direction, and also realizes that the adjusting member can adaptably adjust the extrusion strength between the force transmission member and the connecting section.

[0017] As an embodiment, the number of the wings is at least two and they are evenly distributed in the circumferential direction, and a wing gap is formed between adjacent wings. The force-applying part presses against the force transmission member through the wing gap; or, the force-applying part presses against the force transmission member by pressing against the wings.

[0018] In the implementation of the above technical solution, the number of the wings is at least two and they are evenly distributed in the circumferential direction. A wing gap is formed between adjacent wings. The force-applying portion presses against the force-transmitting member through the wing gap. The force-applying portion can directly contact the force-transmitting member. When the adjusting member rotates in a spiral, the force-applying portion can press against the force-transmitting member. Alternatively, the force transmission member is in contact with the wing, and when the adjusting member moves toward the distal spiral, the force applying portion can be in contact with the wing, and the force is applied to the wing, which is then transmitted to the force transmission member by the wing.

[0019] As an embodiment, the distal positioning portion includes a fixed head and a support seat, the inner circumference of the fixed head is provided with a first positioning portion for connecting with the first valve core, the fixed end at the distal end is provided with a first positioning matching portion, the support seat is provided with the wing, the support seat is sleeved on the outer circumference of the fixed head, and is detachably connected to the fixed head; the proximal positioning portion is provided with a second positioning portion, the proximal fixed end is provided with a second positioning matching portion, and the second positioning portion and the second positioning matching portion are matched and connected with each other.

[0020] In the process of implementing the above technical solution, the distal positioning part includes a fixed head and a support seat. The inner peripheral side of the fixed head is provided with a first positioning part for connecting with the first valve core. When the distal end of the first valve core is connected to the distal positioning part, the structural stability between the two can be improved; the support seat is provided with a wing, the support seat is sleeved on the outer periphery of the fixed head, and is detachably connected to the fixed head, so as to facilitate the assembly of the fixed head and the support seat; the proximal positioning part is provided with a second positioning part, and the fixed end part of the proximal end of the first valve core is provided with a second positioning matching part. The second positioning part and the second positioning matching part are matched and connected with each other, thereby realizing the fixed connection between the proximal end of the first valve core and the proximal positioning part, so as to improve the structural stability of the first valve core and the proximal positioning part.

[0021] As an embodiment, the distal positioning portion is provided with a first positioning portion, the fixed end portion at the distal end is provided with a first positioning matching portion, and the first positioning portion and the first positioning matching portion are mutually matched and connected; the proximal positioning portion is provided with a second positioning portion, the fixed end portion at the proximal end is provided with a second positioning matching portion, and the second positioning portion and the second positioning matching portion are mutually matched and connected.

[0022] In the process of implementing the above technical solution, the distal positioning portion is provided with a first positioning portion, and the fixed end portion of the distal end of the first valve core is provided with a first positioning matching portion, and the first positioning portion and the first positioning matching portion are mutually matched and connected, which can improve the structural stability between the two; the proximal positioning portion is provided with a second positioning portion, and the fixed end portion of the proximal end of the first valve core is provided with a second positioning matching portion, and the second positioning portion and the second positioning matching portion are mutually matched and connected, so as to improve the structural stability of the first valve core and the proximal positioning portion.

[0023] As an embodiment, a second accommodating space is further provided at the distal end of the base, the second accommodating space is communicated with the first accommodating space, a second valve core is provided in the second accommodating space, and the first channel is communicated with the second channel of the second valve core.

[0024] In the process of implementing the above technical solution, a second accommodating space is also provided at the far end of the base, the second accommodating space is connected to the first accommodating space, the second accommodating space is provided with a second valve core, and the first channel is connected to the second channel of the second valve core, so that the sealing valve body in this application is provided with two valve cores. When the instrument passes through the first valve core and the second valve core, the two valve cores can achieve a double sealing effect, thereby improving the sealing between the instrument and the sealing valve body.

[0025] As an embodiment, the sealing valve body also includes a connecting seat for accommodating the second valve core, the proximal end of the connecting seat is connected to the distal positioning portion, the distal end of the distal positioning portion abuts against the proximal end of the second valve core, and the inner circumference of the distal positioning portion is provided with an annular boss for abutting the second valve core.

[0026] In the process of implementing the above technical solution, the sealing valve body also includes a connecting seat for accommodating the second valve core, the proximal end of the connecting seat is connected to the distal positioning part, the distal end of the distal positioning part abuts the proximal end of the second valve core, and an annular boss for abutting the second valve core is provided on the inner circumference of the distal positioning part. When the connecting seat is threadedly connected to the distal positioning part, the second valve core is positioned by setting the annular boss to improve the sealing effect.

[0027] As an embodiment, the sealing valve body further includes an inner membrane member, both ends of which extend out of two fixed ends of the first valve core respectively, and a portion of the inner membrane member located inside the first valve core is formed with folds.

[0028] In the process of implementing the above technical solution, the sealing valve body also includes an inner membrane part. By setting the inner membrane part and utilizing the lubricating characteristics of the inner membrane part itself, it is easier for the instrument to pass through and reduces the friction between the instrument and the first valve core; and the part of the inner membrane part located inside the first valve core is formed with folds, so that when the instrument passes through, the folds of the inner membrane part can fill the gap between the instrument and the inner membrane part, thereby increasing the sealing effect between the instrument and the connecting section; the two ends of the inner membrane part respectively extend out of the two fixed end parts of the first valve core, so that the two ends of the inner membrane part are convenient for the first clamping part and the second clamping part to be respectively inserted into the part of the first valve core to achieve fixation.

[0029] As an embodiment, a first clamping member is provided in the base body, the first clamping member is located at the proximal end of the second valve core, and is communicated with the second valve core, one end of the first clamping member is respectively abutted against the annular boss and the second valve core, and the other end is tightly connected with the distal end of the inner membrane member and abuts against one end of the first valve core; a second clamping member is also provided at the proximal end of the base body, the second clamping member penetrates the proximal positioning portion, and is tightly connected with the proximal end of the inner membrane member and abuts against the other end of the first valve core.

[0030] In the process of implementing the above technical scheme, a first clamping piece is provided in the base body, the first clamping piece is located at the proximal end of the second valve core and is connected with the second valve core to facilitate the passage of the instrument; one end of the first clamping piece is respectively abutted against the annular boss and the second valve core, and the other end is tightly fitted with the distal end of the inner membrane piece, that is, one end of the inner membrane piece is sleeved on one end of the first clamping piece, and the first clamping piece is sleeved with one end of the inner membrane piece and inserted into the first valve core, and abutted against one end of the first valve core, so as to fix the inner membrane piece; the proximal end of the base body is also provided with a second clamping piece, the second clamping piece penetrates the proximal positioning portion and is tightly fitted with the proximal end of the inner membrane piece, that is, the other end of the inner membrane piece is sleeved on one end of the second clamping piece, and the second clamping piece is sleeved with the other end of the inner membrane piece and inserted into the first valve core, and abutted against the other end of the first valve core, so as to fix the inner membrane piece, and the first clamping piece and the second clamping piece are provided to fix the two ends of the inner membrane piece to prevent the inner membrane piece from moving when the instrument is penetrated.

[0031] In a second aspect, the present application provides a guide sheath comprising the sealing valve body provided in the first aspect and a sheath tube connected to the distal end of the sealing valve body.

[0032] In the process of implementing the above technical solution, by setting up a sheath, it is possible to guide the intervention of the instrument, and at the same time, it can also play a role in protecting the blood vessels and reducing the risk of the instrument scratching the blood vessel wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of the overall structure of the sealing valve body provided in an embodiment of the present application; Figure 2 A schematic diagram of the exploded structure of the sealing valve body provided in an embodiment of the present application; Figure 3 Schematic diagram of the partially exploded structure of the sealing valve body provided by the embodiment of the present application from different perspectives; Figure 4 A schematic diagram of a partially exploded structure of a sealing valve body provided in an embodiment of the present application from another perspective; Figure 5 Schematic diagram of the structure of the sealing valve body provided by the embodiment of the present application from different perspectives; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the AA direction; Figure 7 A schematic structural diagram of a sealing valve body provided in another embodiment of the present application; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the BB direction; Figure 9 For Figure 7 A schematic diagram of the exploded structure of a sealing valve body provided in the same embodiment; Figure 10 For Figure 7 Schematic diagram of the exploded structure of the sealing valve body provided by the same embodiment from different perspectives; Figure 11 For Figure 7 A schematic diagram of the exploded structure of the sealing valve body provided in the same embodiment from another perspective; Figure 12 for Figure 8 Schematic diagram of the local enlarged structure.

[0035] Icons: 1-base; 11-distal positioning part; 111-first positioning part; 1111-first groove; 1112-annular protrusion; 112-wing; 113-fixed head; 1131-annular boss; 114-support seat; 12-proximal positioning part; 121-second positioning part; 13-adjusting member; 131-force-applying part; 2-second valve core; 3-first valve core; 31-fixed end; 311-first positioning matching part; 3111-first protrusion; 3112-annular groove; 32-connecting section; 331-second positioning matching part; 4-connecting seat; 41-exhaust channel; 5-sheath tube pressure cover; 6-sheath tube; 7-force transmission member; 71-first split body; 711-first convex tooth; 712-clamping part; 72-second split body; 8-inner membrane member; 9-first clamping member; 10-second clamping member. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0037] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. Furthermore, in the description of this application, the term "distal end" refers to the end of the components of the delivery device that is closest to the cardiac tissue, and "proximal end" refers to the end of the delivery device that is closest to the operator. The terms "first," "second," etc. are used solely to distinguish between the descriptions and should not be understood to indicate or imply relative importance.

[0038] On the first aspect, the embodiment of the present application provides a sealing valve body, which can restore deformation in time, and can be tightened in time when an instrument passes through, and can be wrapped around the peripheral wall of the instrument to seal in time to prevent blood from seeping through; and the sealing valve body can adaptively adjust the tightening force according to the diameter of the instrument passing through to perform effective sealing.

[0039] like Figures 7 to 9, 12, as one embodiment, the sealing valve body includes a base 1 and a first valve core 3 arranged in the base 1; it also includes an adjusting member 13 and a force transmitting member 7 assembled on the base 1 and capable of moving relative to the base 1; the base 1 has a first accommodating space, the first valve core 3 is located in the first accommodating space, the first valve core 3 includes two fixed ends 31 fixed relative to the base 1, which can improve the stability between the first valve core 3 and the base 1, reduce the shaking of the base 1, and improve the success rate of the operation; the first valve core 3 also includes a connecting section 32 located between the two fixed ends 31, the first valve core 3 is provided with a first channel running through the two fixed ends 31 and the connecting section 32, the first channel can allow instruments of different radial sizes to pass through; the force transmitting member 7 is also located in the first accommodating space, and can squeeze the connecting section 32, the force transmitting member 7 includes a first The split body 71 and the second split body 72, the first split body 71 and the second split body 72 are on opposite sides of the connecting section 32, so that the extrusion force generated is from two opposite directions of the connecting section 32, thereby improving the sealing effect between the instrument and the connecting section 32; the first split body 71 is provided with at least two first protruding teeth 711 protruding toward the connecting section 32, and a recess is formed between two adjacent first protruding teeth 711; the second split body 72 is provided with a second protruding tooth toward the recess, and the adjusting member 13 includes a force-applying portion 131 capable of applying force to the force transmitting member 7. When the adjusting member 13 moves relative to the base 1, the force-applying portion 131 on the adjusting member 13 can form a pressing force on the connecting section 32 through the first split body 71 and the second split body 72. At the same time, the staggered first protruding teeth 711 and the second protruding teeth can generate a bite force on the connecting section 32 to improve the sealing between the connecting section 32 and the instrument; In addition, when instruments of different radial sizes pass through the connecting section 32, the tightness between the instruments of different radial sizes and the connecting section 32 can be adjusted by adjusting the movement distance of the adjusting member 13 to adapt to it, thereby improving the sealing effect and the adaptability of the sealing valve body to interventional instruments of different radial sizes.

[0040] like Figure 1 、 2As shown in Figure 6, as a parallel embodiment, the force transmission member 7 includes a first split body 71 and a second split body 72, and the first split body 71 and the second split body 72 are on opposite sides of the connecting section 32, so that the extrusion force generated is from two opposite directions of the connecting section 32, thereby improving the sealing effect between the instrument and the connecting section 32; the first split body 71 is provided with at least two first protruding teeth 711 protruding toward the connecting section 32, and a recess is formed between two adjacent first protruding teeth 711; the second split body 72 is provided with a second protruding tooth toward the recess, and the adjusting member 13 includes a force-applying portion 131 capable of applying force to the force transmission member 7. When the adjusting member 13 moves relative to the base 1, the force-applying portion 131 on the adjusting member 13 can form a resisting force on the connecting section 32 through the first split body 71 and the second split body 72. At the same time, the staggered first protruding teeth 711 and the second protruding teeth can generate a bite force on the connecting section 32 to improve the sealing between the connecting section 32 and the instrument.

[0041] Optionally, the device can be a catheter for delivering implants or repairing intracavitary tissue, a guidewire, or a delivery sheath for valves and peripheral vascular interventional therapy products.

[0042] Optionally, the two fixed ends 31 and the connecting section 32 are integrally formed, and the first valve core 3 may be a silicone member or a rubber member.

[0043] Optionally, in some cases, the first valve core 3 may also have only a fixed end portion 31 at the distal end and a connecting section 32 .

[0044] Optionally, the sealing valve body in the embodiment of the present application can be used in fields involving interventional surgery such as heart valve replacement, repair, peripheral intervention, and gastrointestinal intervention, thereby improving the applicability of the product.

[0045] like Figure 6 and 10 As shown, optionally, the force applying portion 131 is protruding along the inner circumferential wall of the adjusting member 13 , that is, the inner diameter of the adjusting member 13 is tapered.

[0046] Of course, in some cases, the force transmission member 7 can also generate extrusion force on the connecting section 32 from two non-opposite sides in other directions.

[0047] Optionally, the force transmission member 7 may also include a third split and a fourth split, and the number of splits is not limited; if the force transmission member 7 includes a third split and a fourth split, the third split and the fourth split are also arranged relative to each other, and the third split is arranged between the first split 71 and the second split 72, and the fourth split is arranged between the first split 71 and the second split 72. In addition, if the third split and the fourth split are set, then the first split 71 and the second split 72 can be provided with two first protruding teeth 711, and the third split and the fourth split can be provided with at least one second protruding tooth. The second protruding teeth on the third split and the fourth split can be inserted into the recesses of the adjacent first split 71 and the second split 72. In this way, during the extrusion process, the circumference of the connecting section 32 forms a bite force of two first protruding teeth 711 and one second protruding tooth to improve the sealing between the connecting section 32 and the instrument.

[0048] Optionally, the first split body 71 and the second split body 72 may be a split structure or an integrated structure.

[0049] like Figure 2 and 10 As shown, as an embodiment, the first split body 71 and the second split body 72 are respectively provided with corresponding extrusion grooves, the extrusion grooves are adapted to the connecting section 32, the connecting section 32 is located in the extrusion grooves, and the first protruding teeth 711 and the second protruding teeth are respectively provided in the extrusion grooves. When the first split body 71 and the second split body 72 press against the connecting section 32, the first protruding teeth 711 and the second protruding teeth can directly contact the connecting section 32, which can further improve the sealing effect between the force transmission member 7 and the connecting section 32.

[0050] Optionally, the two extrusion grooves can form a ring, so that the connecting section 32 is located in the extrusion groove; of course, if there are more split bodies, such as a third split body, the first split body 71, the second split body 72 and the third split body can form an extrusion groove.

[0051] like Figure 2 、 8 As shown in Figure 9, as an embodiment, the radial dimension of the connecting section 32 is smaller than the radial dimension of the two fixed end portions 31, that is, the radial dimension of the fixed end portion 31 is gradually increased in the direction away from the connecting section 32. In this way, when the first protruding tooth 711 and the second protruding tooth are respectively abutted against the position of the connecting section 32, no additional space is occupied, thereby improving space utilization, and providing accommodation space and deformation space for the first split body 71 and the second split body 72. At the same time, when the adjusting member 13 moves toward the distal end, it is easier for the force-applying portion 131 to squeeze the connecting section 32 through the first split body 71 and the second split body 72, thereby making it easier to adjust the sealing effect between the connecting section 32 and the instrument.

[0052] like Figure 2As shown, as an embodiment, the first body 71 and / or the second body 72 are provided with a deformable hole. The deformable hole can act as a buffer when the first body 71 and / or the second body 72 are deformed. In the embodiment of the present application, the first body 71 and / or the second body 72 can be a block structure. At the same time, the first body 71 and the second body 72 are block structures, which can increase the contact area with the connecting section 32 and improve the sealing effect. When the first body 71 and the second body 72 are flexible block structures, they can be silicone or rubber parts.

[0053] like Figures 8 to 12 As shown, as a parallel embodiment, the first split body 71 and the second split body 72 include a pressing piece for pressing the connecting section 32 and a pushing piece bent and extended from the pressing piece, respectively. The force-applying portion 131 of the adjusting member 13 can abut against the pushing piece. In this way, during the adjustment process of the adjusting member 13, the force-applying portion 131 abuts against the pushing piece. Since the pressing piece and the pushing piece are connected to each other, the abutting force on the pushing piece can be transmitted to the pressing piece, and the pressing piece presses the connecting section 32 to achieve sealing adjustment between the connecting section 32 and the instrument. At the same time, the first split body 71 and the second split body 72 are sheet-like structures, which can increase the contact area with the connecting section 32 and improve the sealing effect.

[0054] Optionally, when the first split body 71 and the second split body 72 are in sheet shape, they may be hard sheet structures, such as stainless steel sheets, copper sheets, or aluminum sheets.

[0055] The force transmission member 7 may further include a third sub-body and a fourth sub-body, and the number of sub-bodies is not limited.

[0056] like Figure 1 、 2 , 7 and 9, as an embodiment, the base 1 includes a distal positioning portion 11 and a proximal positioning portion 12, and the two fixed end portions 31 of the first valve core 3 are respectively fixed to the distal positioning portion 11 and the proximal positioning portion 12, thereby improving the stability between the base 1 and the first valve core 3; the distal positioning portion 11 is provided with a wing 112 extending in the proximal direction, and the wing 112 is provided with an external thread; the adjusting member 13 is provided with an internal thread matching the external thread, and the adjusting member 13 is threadedly matched with the wing 112, and can be rotated relative to the wing 112 so as to move in the axial direction, and also realizes that the adjusting member 13 can adaptably adjust the extrusion strength between the force transmission member 7 and the connecting section 32.

[0057] Optionally, the distal positioning portion 11, the proximal positioning portion 12 and the first valve core 3 may be integrally injection-molded, thereby improving the stability between the three parts and reducing the number of assembly and installation steps.

[0058] As an embodiment, the number of the fins 112 is at least two and they are evenly distributed in the circumferential direction. A fin gap is formed between adjacent fins 112. The force-applying portion 131 presses against the force-transmitting member 7 through the fin gap. The force-applying portion 131 can directly contact the force-transmitting member 7. When the adjusting member 13 rotates helically, the force-applying portion 131 can press against the force-transmitting member 7. In other words, the squeezed portion of the force-transmitting member 7 is located between two adjacent fins 112, and the force-applying portion 131 is protruding along the inner circumferential wall of the adjusting member 13. When the adjusting member 13 rotates and moves toward the distal end relative to the distal positioning portion 11, the force-applying portion 131 directly presses against the squeezed portion of the force-transmitting member 7; when the force-transmitting member 7 is a sheet-like structure, the pressing piece can be located in the wing gap, and the pressing piece protrudes axially from the end of the wing 112, so that when the adjusting member 13 rotates toward the distal end, the force-applying portion 131 can preferentially contact the pressing piece; of course, the pressing piece can also be located in the wing gap and be in the same plane as the peripheral arm of the wing 112, so that when the adjusting member 13 rotates toward the distal end, the force-applying portion 131 can preferentially contact the pressing piece. When rotating toward the distal end, the force-applying portion 131 can simultaneously contact and press against the wing 112 and the pressing piece; when the force-transmitting member 7 is a block-shaped structure, the pressed side of the first split 71 and the second split 72 can be located in the gap between the wing pieces and be in the same plane as the peripheral arm of the wing piece 112. In this way, when the adjusting member 13 is rotated toward the distal end, the force-applying portion 131 can simultaneously contact and press against the wing piece 112 and the first split 71 and the second split 72; when the first split 71 and the second split 72 are flexible block-shaped In the structure, the first split body 71 and the second split body 72 have the same structure, both including a first elastic block and a second elastic block connected to each other. At the same time, a notch is formed on one side of the connection position of the first elastic block and the second elastic block, so that the first elastic block and the second elastic block can be deformed toward each other; when the first split body 71 and the second split body 72 are flexible block structures, the squeezed part of the force transmission member 7, namely the first elastic block and the second elastic block, is located at the position of the wing gap, and the force applying part 131 can directly press against the first elastic block and the second elastic block; like Figure 3 、 6 , 8 and 11, of course, in some cases, the force transmission member 7 can also be fitted with the wing 112, and when the adjusting member 13 moves toward the distal spiral, the force-applying portion 131 can be fitted with the wing 112, and the force is applied to the wing 112 by applying a counter pressure to the wing 112, which is transmitted to the force transmission member 7 by the wing 112; that is, the force transmission member 7 is located on the inner periphery of the distal positioning portion 11 and is fitted with the wing 112. When the adjusting member 13 rotates toward the distal end relative to the distal positioning portion 11, the force-applying portion 131 is used to squeeze the wing 112, and the wing 112 squeezes the force transmission member 7.

[0059] Optionally, the distal positioning portion 11 includes a plurality of fins 112 arranged at intervals along the circumferential direction.

[0060] like Figure 3 and9 As shown, the force transmission member 7 is optionally provided with a clamping portion 712 for clamping with the distal positioning portion 11. By providing the clamping portion 712, the stability between the force transmission member 7 and the distal positioning portion 11 is improved. When the force transmission member 7 is a sheet structure, the clamping portion 712 is provided on the pushing sheet; when the force transmission member 7 is a block structure, the clamping portion 712 is provided on the first elastic block and the second elastic block. Moreover, whether the force-applying portion 131 presses against the force transmission member 7 through the gap between the wings or the force transmission member 7 is in contact with the wings 112, the clamping portion 712 can be clamped with the wings 112.

[0061] like Figure 9 As shown, as an embodiment, the distal positioning portion 11 includes a fixed head 113 and a support seat 114, and the inner peripheral side of the fixed head 113 is provided with a first positioning portion 111 for connecting with the first valve core 3. When the distal end of the first valve core 3 is connected to the distal positioning portion 11, the structural stability between the two can be improved; the support seat 114 is provided with a wing 112, and the support seat 114 is sleeved on the outer periphery of the fixed head 113 and is detachably connected to the fixed head 113, so that the fixed head 113 can be injection molded with the first valve core 3 first, and then connected to the support seat 114 for easy assembly; the proximal positioning portion 12 is provided with a second positioning portion 121, and the fixed end portion 31 of the proximal end of the first valve core 3 is provided with a second positioning matching portion 331, and the second positioning portion 121 and the second positioning matching portion 331 are matched and connected with each other, thereby realizing the fixed connection between the proximal end of the first valve core 3 and the proximal positioning portion 12, so as to improve the structural stability of the first valve core 3 and the proximal positioning portion 12.

[0062] like Figure 2 As shown, of course, the fixing head 113 and the supporting seat 114 can also be an integral injection molded part, that is, the distal positioning portion 11 is an integral part.

[0063] Optionally, the fixing head 113 and the supporting base 114 may be snap-connected.

[0064] like Figures 2 to 4 As shown, as a parallel embodiment, the distal positioning portion 11 is provided with a first positioning portion 111, and the fixed end portion 31 at the distal end of the first valve core 3 is provided with a first positioning matching portion 311. The first positioning portion 111 and the first positioning matching portion 311 cooperate and connect with each other, which can improve the structural stability between the two. The proximal positioning portion 12 is provided with a second positioning portion 121, and the fixed end portion 31 at the proximal end of the first valve core 3 is provided with a second positioning matching portion 331. The second positioning portion 121 and the second positioning matching portion 331 cooperate and connect with each other to improve the structural stability of the first valve core 3 and the proximal positioning portion 12. In the embodiment of the present application, the support seat 114 and the fixed head 113 are integrally injection-molded parts, that is, the distal positioning portion 11 is a single part, and the distal positioning portion 11 is also provided with multiple fins 112.

[0065] like Figure 2 and 9 As shown, optionally, the first positioning portion 111 includes a plurality of first grooves 1111 and annular protrusions 1112 arranged at circumferential intervals along the distal positioning portion 11, the annular protrusions 1112 space the first groove 1111 into two first sub-grooves, and the first positioning matching portion 311 includes a plurality of first protrusions 3111 and annular grooves 3112 arranged at circumferential intervals along the fixed end portion 31, the annular grooves 3112 space the first protrusion 3111 into two first sub-protrusions, and the annular protrusions 1112 are adapted to the annular grooves 3112, thereby increasing the injection molding contact area between the positioning portion and the first positioning matching portion 311 and improving the structural stability.

[0066] Optionally, in some cases, the first positioning portion 111 includes a plurality of first grooves 1111 arranged at circumferential intervals along the distal positioning portion 11, and the first positioning matching portion 311 includes a plurality of first protrusions 3111 arranged at circumferential intervals along the fixed end portion 31 of the distal end, or; the first positioning portion 111 includes a plurality of first protrusions 3111 arranged at circumferential intervals along the distal positioning portion 11, and the first positioning matching portion 311 includes a plurality of first grooves 1111 arranged at circumferential intervals along the fixed end portion 31 of the distal end, that is, the annular protrusions 1112 and the annular grooves 3112 are eliminated.

[0067] Optionally, the second positioning portion 121 has the same structure as the first positioning portion 111 .

[0068] like Figure 2 and 9 As shown, as an embodiment, a second accommodating space is further provided at the far end of the base 1, the second accommodating space is connected to the first accommodating space, the second accommodating space is provided with a second valve core 2, and the first channel is connected to the second channel of the second valve core 2, so that the sealing valve body in this application is provided with two valve cores. When the instrument passes through the first valve core 3 and the second valve core 2, the two valve cores can achieve a double sealing effect, thereby improving the sealing between the instrument and the sealing valve body.

[0069] Optionally, the distal end of the second valve core 2 is a sealing end for abutting against the sheath tube 6 , and the proximal end is an opening structure.

[0070] like Figure 1 、 4 As shown in Figures 6 and 8, as an embodiment, the sealing valve body also includes a connecting seat 4 for accommodating the second valve core 2, the proximal end of the connecting seat 4 is connected to the distal positioning portion 11, the distal end of the distal positioning portion 11 abuts against the proximal end of the second valve core 2, and the inner circumference of the distal positioning portion 11 is provided with an annular boss 1131 for abutting the second valve core 2. When the connecting seat 4 is threadedly connected to the distal positioning portion 11, the second valve core 2 is positioned by providing the annular boss 1131 to improve the sealing effect.

[0071] Optionally, an exhaust channel 41 for exhaust is provided on the connecting seat 4.

[0072] Optionally, the outer edge of the second valve core 2 is clamped by the connecting seat 4 and the distal positioning portion 11, which can also improve the sealing performance.

[0073] like Figure 1 and 7 As shown, optionally, the sealing valve body includes a sheath tube gland 5 for connecting to the sheath tube 6 , and the sheath tube gland 5 is connected to the connecting seat 4 , thereby fixing the sheath tube 6 .

[0074] like Figures 7 to 12 As shown, as an embodiment, the sealing valve body also includes an inner membrane part 8. By providing the inner membrane part 8 and utilizing the lubricating characteristics of the inner membrane part 8 itself, it is easier for the instrument to pass through, thereby reducing the friction between the instrument and the first valve core 3; and the part of the inner membrane part 8 located inside the first valve core 3 is formed with folds, so that when the instrument passes through, the folds of the inner membrane part 8 can fill the gap between the instrument and the inner membrane part 8, thereby increasing the sealing effect of the instrument and the connecting section 32; the two ends of the inner membrane part 8 respectively extend out of the two fixed end parts 31 of the first valve core 3, so that the two ends of the inner membrane part 8 are convenient for the first clamping part 9 and the second clamping part 10 to be respectively inserted into the parts of the first valve core 3 to achieve fixation.

[0075] Preferably, the portion of the inner membrane member 8 within the first valve core 3 is not fixed relative to the first valve core 3, that is, the portion of the inner membrane member 8 located within the first valve core 3 is not adhered to the first valve core 3, which facilitates assembly and also allows the inner membrane member 8 to be unrestricted, thereby improving the sealing effect and the passability of the device. The wrinkles are formed because the unfolded length of the inner membrane member 8 located within the first valve core 3 is greater than the length of the first valve core. Therefore, when the inner membrane member 8 is folded and contracted in length and placed within the first valve core 3, undulating wrinkles are formed in the axial direction of the sealed valve body. Of course, wrinkles also include the case where the cross-sectional circumferential length of the inner membrane member 8 located within the first channel is greater than the cross-sectional circumferential length of the connecting section 32, forming undulating wrinkles in the first channel within the connecting section 32. Of course, wrinkles also include the case where the cross-sectional circumferential length of the inner membrane member 8 located within the fixed end portion 31 is greater than the cross-sectional circumferential length of the fixed end portion 31.

[0076] Optionally, the inner membrane member 8 may be an ePTFE membrane, which can improve the permeability, sealing and hydraulic resistance during the penetration of internal instruments, thereby facilitating the passage of instruments.

[0077] Optionally, the inner membrane member 8 may also be made of materials such as PTFE membrane, PVDF membrane, PP membrane, PE membrane, and nanofiber membrane.

[0078] like Figures 7 to 11As shown, as an embodiment, a first clamping member 9 is provided in the base 1, and the first clamping member 9 is located at the proximal end of the second valve core 2 and is communicated with the second valve core 2 to facilitate the passage of instruments; one end of the first clamping member 9 is respectively abutted against the annular boss 1131 and the second valve core 2, and the other end is tightly connected with the distal end of the inner membrane member 8, that is, one end of the inner membrane member 8 is sleeved on one end of the first clamping member 9, and the first clamping member 9 is sleeved on one end of the inner membrane member 8 and inserted into the first valve core 3, and abutted against one end of the first valve core 3, so as to fix the inner membrane member 8; A second clamping member 10 is also provided at the proximal end of the base body 1. The second clamping member 10 penetrates into the proximal positioning portion 12 and is tightly connected with the proximal end of the inner membrane member 8, that is, the other end of the inner membrane member 8 is sleeved on one end of the second clamping member 10, and the second clamping member 10 is sleeved on the other end of the inner membrane member 8 and inserted into the first valve core 3, and abuts against the other end of the first valve core 3 to fix the inner membrane member 8. The fixation of the two ends of the inner membrane member 8 is achieved by arranging the first clamping member 9 and the second clamping member 10 to prevent the inner membrane member 8 from moving when the instrument is penetrated.

[0079] Optionally, the length of the inner membrane part 8 is greater than the length of the first valve core 3, and the first clamping part 9 and the second clamping part 10 both include plug-in columns. The redundancy at both ends of the inner membrane part 8 can be mounted on the plug-in columns of the first clamping part 9 and the second clamping part 10. In this way, when the first clamping part 9 and the second clamping part 10 are respectively plugged into the two ends of the first valve core 3, they can fix the inner membrane part 8.

[0080] Optionally, the second clamping member 10 may be engaged with the proximal positioning portion 12 to improve the stability between the second clamping member 10 and the proximal positioning portion 12 .

[0081] like Figure 5 and 9 As shown, in a second aspect, an embodiment of the present application provides a guide sheath, comprising the sealing valve body provided in the first aspect and a sheath tube 6 connected to the distal end of the sealing valve body. By providing the sheath tube 6, it is possible to guide instrument intervention and, at the same time, protect the blood vessel and reduce the risk of instrument scratching the blood vessel wall.

[0082] Optionally, the sheath 6 is an expandable sheath.

[0083] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0084] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0085] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A sealing valve body, characterized in that: The valve comprises a base, a first valve core arranged in the base, an adjusting member and a force transmitting member assembled on the base and movable relative to the base; The base has a first accommodating space, and the first valve core is located in the first accommodating space; The first valve core includes two fixed ends fixed to the base and a connecting section located between the two fixed ends, and the first valve core is provided with a first channel running through the two fixed ends and the connecting section; The force transmission member includes a first split body and a second split body provided on opposite sides of the connecting section, the first split body having at least two first protruding teeth on a side facing the connecting section, with a recess formed between two adjacent first protruding teeth; the second split body having a second protruding tooth facing the recess; The adjusting member includes a force applying portion capable of applying force to the force transmitting member. When the adjusting member moves relative to the base, the force applying portion presses the force transmitting member so that the second protruding tooth presses the connecting section toward the recess.

2. The sealing valve body according to claim 1, characterized in that: The first split body and the second split body are respectively provided with corresponding extrusion grooves, the connecting section is located in the extrusion grooves, and the first protruding teeth and the second protruding teeth are respectively arranged in the extrusion grooves.

3. The sealing valve body according to claim 2, characterized in that: The radial dimension of the connecting section is smaller than the radial dimension of the two fixed end portions, and the first protruding teeth and the second protruding teeth are respectively in contact with the connecting section.

4. The sealing valve body according to any one of claims 1 to 3, characterized in that: The first split body and / or the second split body is provided with a deformable hole.

5. The sealing valve body according to any one of claims 1 to 3, characterized in that: The first split body and the second split body include a pressing piece for pressing the connecting section and a pushing piece bent and extended from the pressing piece, respectively. The force applying portion of the adjusting member can be in contact with the pushing piece.

6. The sealing valve body according to any one of claims 1 to 3, characterized in that: The base includes a distal positioning portion and a proximal positioning portion, and the two fixed ends of the first valve core are respectively fixed to the distal positioning portion and the proximal positioning portion; the distal positioning portion is provided with a wing extending toward the proximal direction, and the wing is provided with an external thread; The adjusting member is provided with an internal thread matched with the external thread, and the adjusting member is rotated relative to the wing so as to be movable in the axial direction.

7. The sealing valve body according to claim 6, characterized in that: The number of the fins is at least two and they are evenly distributed in the circumferential direction, and fin gaps are formed between adjacent fins, and the force applying portion presses against the force transmitting member through the fin gaps; Alternatively, the force applying portion presses the force transmitting member by pressing the wing.

8. The sealing valve body according to claim 6, characterized in that: The distal positioning portion includes a fixed head and a support seat, the inner circumference of the fixed head is provided with a first positioning portion for connecting with the first valve core, the distal fixed end is provided with a first positioning matching portion, the support seat is provided with the wing, and the support seat is sleeved on the outer circumference of the fixed head and is detachably connected to the fixed head; The proximal positioning portion is provided with a second positioning portion, the proximal fixed end portion is provided with a second positioning matching portion, and the second positioning portion and the second positioning matching portion are matched and connected with each other.

9. The sealing valve body according to claim 6, characterized in that: The distal positioning portion is provided with a first positioning portion, and the distal fixed end is provided with a first positioning matching portion, and the first positioning portion and the first positioning matching portion are mutually matched and connected; The proximal positioning portion is provided with a second positioning portion, the proximal fixed end portion is provided with a second positioning matching portion, and the second positioning portion and the second positioning matching portion are matched and connected with each other.

10. The sealing valve body according to claim 6, characterized in that: A second accommodating space is further provided at the distal end of the base body. The second accommodating space is communicated with the first accommodating space. A second valve core is provided in the second accommodating space. The first channel is communicated with the second channel of the second valve core.

11. The sealing valve body according to claim 10, characterized in that: The sealing valve body also includes a connecting seat for accommodating the second valve core, the proximal end of the connecting seat is connected to the distal positioning portion, the distal end of the distal positioning portion abuts the proximal end of the second valve core, and the inner circumference of the distal positioning portion is provided with an annular boss for abutting the second valve core.

12. The sealing valve body according to claim 11, characterized in that: The sealing valve body further includes an inner membrane member, two ends of which extend out of two fixed ends of the first valve core respectively, and a portion of the inner membrane member located inside the first valve core is formed with folds.

13. The sealing valve body according to claim 12, characterized in that: A first clamping member is provided in the base body. The first clamping member is located at the proximal end of the second valve core and is communicated with the second valve core. One end of the first clamping member abuts against the annular boss and the second valve core respectively, and the other end is tightly connected with the distal end of the inner membrane member and abuts against one end of the first valve core. A second clamping piece is further provided at the proximal end of the base body. The second clamping piece penetrates the proximal end positioning portion, is tightly fitted and connected with the proximal end of the inner membrane piece, and abuts against the other end of the first valve core.

14. An introducer sheath, characterized in that: It comprises the sealing valve body according to any one of claims 1 to 13 and a sheath connected to the distal end of the sealing valve body.

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