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 a base body and a first valve core arranged in the base body; 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, and the first valve element is provided with a first channel penetrating through the two fixed ends and the connecting section. The sealing valve body comprises an inner film piece, the two ends of the inner film piece extend out of the two fixed end portions of the first valve element respectively, and folds are formed on the portion, located in the first valve element, of the inner film piece. According to the technical scheme, the sealing performance between the instrument penetrating through the first valve element and the first valve element is adjusted in a self-adaptive mode, and therefore 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, this sealing method creates significant friction between the silicone sheet and the instrument, compromising its sealing effectiveness when multiple instruments pass through. Summary of the Invention

[0004] The technical problem to be solved by the present application is to provide a sealing valve body with improved sealing performance 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 a first aspect, the present application provides a sealing valve body, comprising a base and a first valve core arranged in 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 comprises 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 passing through the two fixed ends and the connecting section; the sealing valve body comprises an inner membrane part, both ends of the inner membrane part respectively extend out of the two fixed ends of the first valve core, and the part of the inner membrane part located in the first valve core is formed with folds.

[0006] In the process of implementing the above technical solution, the sealing valve body includes a base body and a first valve core arranged in the base body; the base body has a first accommodating space, the first valve core is located in the first accommodating space, and the first valve core includes two fixed ends relatively fixed to the base body, which can improve the stability between the first valve core and the base body, reduce the shaking of the base body, and improve the success rate of the operation; the first valve core also includes 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, and the first channel can allow instruments of different radial sizes to pass through; the sealing valve body also includes an inner membrane, and the two ends of the inner membrane are respectively The two fixed ends of the first valve core are extended to facilitate other parts to fix the two ends of the inner membrane part; by providing 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 reduce 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 first valve core; when multiple groups of instruments pass through, the folds can also automatically fill the gaps between the multiple groups of instruments and the inner membrane part, thereby increasing the sealing effect between the instrument and the first valve core.

[0007] As an embodiment, the radial dimension of the connecting section is smaller than the radial dimension of the two fixed end portions.

[0008] 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, thereby increasing the contact area with the base and improving stability; when the force transmission member abuts against the position of the connecting section, it does not occupy additional space, thereby improving space utilization, and can provide accommodation space and deformation space for the force transmission member. At the same time, when the adjusting member moves toward the distal end, it makes it easier for the force-applying part to squeeze the connecting section through the force transmission member, thereby making it easier to adjust the sealing effect between the connecting section and the instrument.

[0009] As an embodiment, the portion of the inner membrane member located inside the first valve core is not fixed to the first valve core.

[0010] In the process of implementing the above technical solution, the part of the inner membrane part located in the first valve core is not fixed relative to the first valve core, that is, the part of the inner membrane part located in the first valve core is not adhered to the first valve core, which facilitates assembly. At the same time, it can also make the inner membrane part unrestricted, thereby improving the sealing effect and the passability of the instrument.

[0011] As an embodiment, the inner membrane member includes two fixing portions and a connecting portion located between the two fixing portions, and a radial dimension of the connecting portion is smaller than a radial dimension of the two fixing portions.

[0012] In the process of implementing the above technical solution, the inner membrane part includes two fixed parts and a connecting part located between the two fixed parts. The radial dimension of the connecting part is smaller than the radial dimension of the two fixed parts, so that the shape of the inner membrane part is adapted to the shape of the first valve core, which facilitates the assembly of the two. At the same time, the radial dimension of the fixed part is larger than the connecting part, which also facilitates the two ends of the inner membrane part to be respectively mounted on the first clamping part and the second clamping part, thereby improving the stability of the inner membrane part and the first clamping part and the second clamping part.

[0013] As an embodiment, the circumferential length of the cross section of the connecting portion is greater than the circumferential length of the cross section of the connecting segment.

[0014] In the process of implementing the above technical solution, the cross-sectional circumferential length of the connecting part is greater than the cross-sectional circumferential length of the connecting section. When the inner membrane part is assembled with the first valve core, the inner membrane part located in the connecting part will form folds. 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.

[0015] As an embodiment, a first clamping member is provided in the base body, the first clamping member is located at the distal end of the first valve core and is communicated with the first valve core, the first clamping member includes a first insertion section, the fixed portion of the distal end of the inner membrane member is sleeved on the first insertion section, and the first insertion section is inserted into the fixed end portion at the distal end; a second clamping member is provided at the proximal end of the base body, the second clamping member is located at the proximal end of the first valve core and is communicated with the first valve core, the second clamping member includes a second insertion section, the fixed portion of the proximal end of the inner membrane member is sleeved on the second insertion section, and the second insertion section is inserted into the fixed end portion at the proximal end.

[0016] In the process of implementing the above technical scheme, a first clamping member is provided in the base body, the first clamping member is located at the distal end of the first valve core, and is communicated with the first valve core to facilitate the passage of the instrument; the first clamping member includes a first insertion section, the fixed portion of the distal end of the inner membrane member is sleeved on the first insertion section, and the first insertion section is inserted into the fixed end portion of the distal end of the first valve core, so that the first clamping member fixes the distal end of the inner membrane member and improves stability; the proximal end of the base body is provided with a second clamping member, the second clamping member is located at the proximal end of the first valve core and is communicated with the first valve core, the second clamping member includes a second insertion section, the fixed portion of the proximal end of the inner membrane member is sleeved on the second insertion section, and the second insertion section is inserted into the fixed end portion of the proximal end of the first valve core, so that the first clamping member fixes the proximal end of the inner membrane member and improves stability.

[0017] As an embodiment, the distal end of the base is further provided with a second accommodating space, the second accommodating space is connected to the first accommodating space, and the first clamping member is located in the second accommodating space; the base includes a distal positioning portion, and the inner circumference of the distal positioning portion is provided with an annular boss for abutting against one side of the first clamping member.

[0018] In the process of implementing the above technical solution, a second accommodating space is also provided at the distal end of the base, the second accommodating space is connected to the first accommodating space, the first clamping member is located in the second accommodating space, and the second accommodating space provides an accommodating space for the first clamping member; the base includes a distal positioning portion, and the inner circumference of the distal positioning portion is provided with an annular boss for abutting one side of the first clamping member. By setting the annular boss, the first clamping member is abutted to improve the sealing effect.

[0019] As an embodiment, the sealing valve body further includes a second valve core and a connecting seat for accommodating the second valve core, the proximal end of the connecting seat is connected to the distal positioning portion, and the second valve core is respectively abutted against the distal positioning portion and the first clamping member.

[0020] In the process of implementing the above technical solution, 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 play a double sealing effect, thereby improving the sealing between the instrument and the sealing valve body; the sealing valve body also includes a connecting seat for accommodating the second valve core, the proximal end of the connecting seat is threadedly connected to the distal positioning part, and the distal end of the distal positioning part abuts the proximal end of the second valve core. When the connecting seat is threadedly connected to the distal positioning part, the second valve core abuts the distal positioning part and the first clamping member respectively, and one side of the first clamping member abuts the annular boss to position the second valve core and improve the sealing effect.

[0021] As an embodiment, the sealing valve body includes an adjusting part and a force transmitting part assembled on the base and movable relative to the base, the force transmitting part is located in the first accommodating space and can squeeze the connecting section of the first valve core; the adjusting part includes a force applying part that can apply force to the force transmitting part, and when the adjusting part moves relative to the base, the force applying part squeezes the connecting section through the force transmitting part.

[0022] In the process of implementing the above technical solution, the sealing valve body also includes an adjusting part and a force transmitting part assembled on the base and capable of moving relative to the base. The force transmitting part is also located in the first accommodating space and can squeeze the connecting section. The adjusting part includes a force applying part that can apply force to the force transmitting part. When the adjusting part moves relative to the base, the force transmitting part can also squeeze the connecting section, so that the force applying part on the adjusting part can squeeze the connecting section through the force transmitting part. When instruments with different radial sizes pass through the connecting section, the tightness between instruments with different radial sizes and the connecting section can be adjusted by adjusting the movement distance of the adjusting part to adapt to it, thereby improving the sealing effect and the adaptability of the sealing valve body to interventional instruments with different radial sizes.

[0023] As an embodiment, the force transmission member squeezes at least two opposite sides of the connecting section.

[0024] During the implementation of the above technical solution, the force transmission member is squeezed at least on two opposite sides of the connecting section, so that the squeezing force generated is from two opposite directions of the connecting section, thereby improving the sealing effect between the instrument and the connecting section. As an embodiment, the force transmission member includes a first split body and a second split body, the first split body and the second split body are respectively provided with corresponding extrusion grooves, and the connecting section is located in the extrusion grooves.

[0025] In the process of implementing the above technical solution, the force transmission member includes a first split and a second split, and the first split and the second split are respectively provided with corresponding extrusion grooves, which are adapted to the connecting section, and the connecting section is located in the extrusion grooves. In this way, the contact area between the first split and the second split and the connecting section can be increased, and the sealing effect between the force transmission member and the connecting section can be further improved.

[0026] As an embodiment, the force transmission member includes a first split and a second split, and the first split and the second split include a pressure piece for respectively pressing the connecting section and a push piece bent and extended from the pressure piece, and the force-applying portion of the adjustment member can be in contact with the push piece.

[0027] In the process of implementing the above technical solution, the force transmission member includes a first split and a second split, and the first split and the second split include a pressure piece for respectively pressing the connecting section and a pushing piece bent and extended from the pressure piece. The force-applying portion of the adjusting member can abut against the pushing piece. In this way, during the adjustment process of the adjusting member, the force-applying portion 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 and the second split are sheet-like structures, which can increase the contact area with the connecting section and improve the sealing effect.

[0028] As an embodiment, the first split body is provided with at least two first protruding teeth protruding toward the connecting section, and a recess is formed between two adjacent first protruding teeth; the second split body is provided with at least one second protruding tooth for pressing toward the recess.

[0029] In the process of implementing the above technical solution, the first split body is provided with at least two first protruding teeth protruding toward the connecting section, and a recess is formed between two adjacent first protruding teeth; the second split body is provided with at least one second protruding tooth for pressing toward the recess, so that when the first split body and the second split body both form a pressing force on the connecting section, the staggered first protruding teeth and the second protruding teeth can generate a bite force on the connecting section to improve the sealing between the connecting section and the instrument.

[0030] As an embodiment, the base includes 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 can move axially by rotating relative to the wing.

[0031] In the process of implementing the above technical solution, the base also includes 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, thereby improving the stability between the base and the first valve core; the distal positioning portion 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.

[0032] 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.

[0033] 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

[0034] 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.

[0035] 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 a local enlarged structure; Figure 13 For Figure 7 A schematic diagram of the exploded structure of the sealing valve body provided in the same embodiment from another perspective; Figure 14 Schematic diagram of the formation of folds in the inner membrane.

[0036] Icons: 1-base; 11-distal positioning portion; 111-first positioning portion; 1111-first groove; 1112-annular protrusion; 112-wing; 113-fixed head; 1131-annular boss; 114-support seat; 12-proximal positioning portion; 121-second positioning portion; 13-adjusting member; 131-force-applying portion; 2-second valve core; 3-first valve core; 31-fixed end; 311-first positioning portion 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 protruding tooth; 712-clamping part; 72-second split body; 8-inner membrane member; 81-fixing part; 82-connecting part; 9-first clamping member; 10-second clamping member. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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 be effectively sealed through the folds on the inner membrane according to the diameter of the instrument passing through.

[0040] like Figures 7 to 9, 13 and 14, the sealing valve body includes a base 1 and a first valve core 3 arranged in 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 relatively 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, and the first channel can allow instruments of different radial sizes to pass through; the sealing valve body also includes an inner membrane member 8, and the two ends of the inner membrane member 8 The two fixed end portions 31 of the first valve core 3 are respectively extended from the ends, so that other parts can fix the two ends of the inner membrane part 8; by providing the inner membrane part 8, the lubricating characteristics of the inner membrane part 8 itself are utilized to make it easier for the instrument to pass through and reduce 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 between the instrument and the first valve core 3; when multiple groups of instruments pass through, the folds can also automatically fill the gaps between the multiple groups of instruments and the inner membrane part 8, thereby increasing the sealing effect between the instrument and the first valve core 3.

[0041] like Figure 13 and 14 As shown, preferably, the folds are formed because the expanded 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 folds are formed in the axial direction of the sealed valve body. Of course, folds can also include the case where the cross-sectional circumferential length of the inner membrane member 8 located in the first channel is greater than the cross-sectional circumferential length of the connecting section 32, forming undulating folds in the first channel within the connecting section 32. Of course, folds can 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 .

[0047] 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.

[0048] like Figure 2 、 8 As shown in Figures 9 and 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, thereby increasing the contact area with the base 1 and improving stability; when the force transmission member 7 abuts against the position of the connecting section 32, it does not occupy additional space, thereby improving space utilization, and can provide accommodation space and deformation space for the force transmission member 7. At the same time, when the adjusting member 13 moves toward the distal end, it makes it easier for the force-applying portion 131 to squeeze the connecting section 32 through the force transmission member 7, thereby making it easier to adjust the sealing effect between the connecting section 32 and the instrument.

[0049] like Figure 13 As shown, as an embodiment, the portion of the inner membrane part 8 inside the first valve core 3 is not fixed relative to the first valve core 3, that is, the portion of the inner membrane part 8 located inside the first valve core 3 is not adhered to the first valve core 3, which facilitates assembly. At the same time, it can also make the inner membrane part 8 unrestricted, thereby improving the sealing effect and the passability of the instrument.

[0050] like Figure 8 、 12 As shown in Figures 13 and 13, as an embodiment, the inner membrane member 8 includes two fixing portions 81 and a connecting portion 82 located between the two fixing portions 81. The radial dimension of the connecting portion 82 is smaller than the radial dimension of the two fixing portions 81, so that the shape of the inner membrane member 8 is compatible with the shape of the first valve core 3, which is convenient for the assembly of the two. At the same time, the radial dimension of the fixing portion 81 is larger than the connecting portion 82, which also facilitates the two ends of the inner membrane member 8 to be respectively mounted on the first clamping member 9 and the second clamping member 10, thereby improving the stability of the inner membrane member 8 and the first clamping member 9 and the second clamping member 10.

[0051] As an embodiment, the cross-sectional circumferential length of the connecting portion 82 is greater than the cross-sectional circumferential length of the connecting section 32. When the inner membrane member 8 is assembled with the first valve core 3, the inner membrane member 8 located in the connecting portion 82 will form folds. When an instrument passes through, the folds of the inner membrane member 8 can fill the gap between the instrument and the inner membrane member 8, thereby increasing the sealing effect between the instrument and the connecting section 32.

[0052] like Figures 8 to 10, 12 and 13, as an embodiment, a first clamping member 9 is provided in the base body 1, and the first clamping member 9 is located at the distal end of the first valve core 3 and is communicated with the first valve core 3 to facilitate the passage of instruments; the first clamping member 9 includes a first insertion section, and the fixing portion 81 at the distal end of the inner membrane member 8 is sleeved on the first insertion section, and the first insertion section is inserted into the fixed end portion 31 at the distal end of the first valve core 3, so that the first clamping member 9 fixes the distal end of the inner membrane member 8 and improves stability; the proximal end of the base body 1 is provided with a first The second clamping member 10 is located at the proximal end of the first valve core 3 and is connected to the first valve core 3. The second clamping member 10 includes a second insertion section. The fixed portion 81 at the proximal end of the inner membrane member 8 is sleeved on the second insertion section. The second insertion section is inserted into the fixed end portion 31 at the proximal end of the first valve core 3. The first clamping member 9 realizes the proximal fixation of the inner membrane member 8. By setting the first clamping member 9 and the second clamping member 10, the two ends of the inner membrane member 8 are fixed to prevent the inner membrane member 8 from moving when the instrument is inserted.

[0053] 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 .

[0054] like Figure 8 As shown, as an embodiment, the distal end of the base 1 is further provided with a second accommodating space, the second accommodating space is communicated with the first accommodating space, the first clamping member 9 is located in the second accommodating space, and the second accommodating space provides an accommodating space for the first clamping member 9; the base 1 includes a distal positioning portion 11, and the distal positioning portion 11 has an annular boss 1131 on the inner circumference thereof for abutting against one side of the first clamping member 9. By providing the annular boss 1131, the first clamping member 9 is abutted to improve the sealing effect.

[0055] like Figures 7 to 9 As shown, as an embodiment, 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 play a double sealing effect, thereby improving the sealing between the instrument and the sealing valve body; 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 threadedly connected to the distal positioning part 11, and the distal end of the distal positioning part 11 abuts against the proximal end of the second valve core 2. When the connecting seat 4 is threadedly connected to the distal positioning part 11, the second valve core 2 abuts against the distal positioning part 11 and the first clamping member 9 respectively, and one side of the first clamping member 9 abuts against the annular boss 1131 to position the second valve core 2 and improve the sealing effect.

[0056] like Figure 6 and 9As shown, optionally, an exhaust channel 41 for exhaust is provided on the connecting seat 4.

[0057] 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.

[0058] 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.

[0059] 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 .

[0060] As an embodiment, the sealing valve body also includes an adjusting member 13 and a force transmitting member 7 which are assembled on the base 1 and can move relative to the base 1; the force transmitting member 7 is also located in the first accommodating space and can squeeze the connecting section 32. The adjusting member 13 includes a force applying portion 131 which can apply force to the force transmitting member 7. When the adjusting member 13 moves relative to the base 1, and the force transmitting member 7 can also squeeze the connecting section 32, the force applying portion 131 on the adjusting member 13 can squeeze the connecting section 32 through the force transmitting member 7. When instruments of different radial sizes pass through the connecting section 32, the tightness between 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 also improving the adaptability of the sealing valve body to interventional instruments of different radial sizes.

[0061] 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.

[0062] like Figure 2 、 8 As shown in Figures 9 and 9 , as an embodiment, the force transmission member 7 is squeezed on at least two opposite sides of the connecting section 32 so that the squeezing 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.

[0063] 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.

[0064] like Figure 2 and 10As shown, as an 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 respectively provided with corresponding extrusion grooves, which are adapted to the connecting section 32, and the connecting section 32 is located in the extrusion grooves. In this way, the contact area between the first split body 71 and the second split body 72 and the connecting section 32 can be increased, and the sealing effect between the force transmission member 7 and the connecting section 32 can be further improved.

[0065] 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.

[0066] Optionally, 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.

[0067] Optionally, the first split body 71 and the second split body 72 may be a split structure or an integrated structure.

[0068] like Figure 2 As shown, optionally, the first body 71 and / or the second body 72 are provided with a deformable hole, which 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.

[0069] like Figure 2 、 6 , 8 to 12, as a parallel embodiment, the force transmission member 7 includes a first split body 71 and a second split body 72, the first split body 71 and the second split body 72 include a pressure piece for respectively pressing the connecting section 32 and a pushing piece bent and extended from the pressure piece, the force-applying portion 131 of the adjusting member 13 can abut against the pushing piece, so that during the adjustment process of the adjusting member 13, the force-applying portion 131 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 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.

[0070] 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.

[0071] 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.

[0072] like Figure 2 、 6 As shown in Figures 8 to 10 and 12, as an embodiment, 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 at least one second protruding tooth for pressing toward the recess, so that when the first split body 71 and the second split body 72 both form a pressing force on the connecting section 32, 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.

[0073] Optionally, when the force transmission member 7 is a block structure or a sheet structure, the first split body 71 and the second split body 72 can be provided with a first protruding tooth 711 and a second protruding tooth respectively.

[0074] like Figure 1 、 2 , 7 and 9, as an embodiment, the base 1 also includes a proximal positioning portion 12, and the two fixed ends 31 of the first valve core 3 are respectively fixed to the distal positioning portion 11 and the proximal positioning portion 12, so as to improve 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.

[0075] 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.

[0076] Optionally, the number of the fins 112 is at least two, and they are evenly distributed in the circumferential direction, and 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, and the force-applying portion 131 can directly contact the force-transmitting member 7. When the adjusting member 13 rotates in a spiral, the force-applying portion 131 can press against the force-transmitting member 7; that is, the squeezed portion of the force-transmitting member 7 is located between two adjacent fins 112, and the force-applying portion 131 is protruded along the inner circumferential wall of the adjusting member 13. When the adjusting member 13 rotates in a spiral, 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 protruded along the inner circumferential wall of the adjusting member 13. When the adjusting member 13 is rotated 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 is rotated 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 is rotated toward the distal end, the force-applying portion 131 can preferentially contact the pressing piece. When the adjusting member 13 is rotated toward the distal end, the force applying portion 131 can contact and press the wing 112 and the pressing piece at the same time; when the force transmitting member 7 is a block structure, the pressed side of the first split body 71 and the second split body 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 contact and press the wing piece 112 and the first split body 71 and the second split body 72 at the same time; when the first split body 71 and the second split body 72 are flexible block structures, When the first and second split bodies 71 and 72 are configured as a single body, the first and second split bodies 71 and 72 have the same structure, both including a first elastic block and a second elastic block connected to each other. A notch is formed on one side of the connection between the first and second elastic blocks, allowing the first and second elastic blocks to deform toward each other. When the first and second split bodies 71 and 72 are flexible block-shaped structures, the squeezed portion of the force transmission member 7, i.e., the first and second elastic blocks, is located at the gap between the fins, and the force-applying portion 131 can directly press against the first and second elastic blocks. 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.

[0077] Optionally, the distal positioning portion 11 includes a plurality of fins 112 arranged at intervals along the circumferential direction.

[0078] like Figure 3 and 9As 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.

[0079] like Figure 9 As shown, optionally, 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.

[0080] 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.

[0081] Optionally, the fixing head 113 and the supporting base 114 may be snap-connected.

[0082] like Figures 2 to 4 As shown, optionally, 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 a plurality of fins 112.

[0083] like Figure 2 and9 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.

[0084] 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.

[0085] Optionally, the second positioning portion 121 has the same structure as the first positioning portion 111 .

[0086] 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.

[0087] Optionally, the sheath 6 is an expandable sheath.

[0088] 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.

[0089] 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.

[0090] 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: It comprises a base body and a first valve core arranged in the base body; 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 sealing valve body 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 wrinkles.

2. The sealing valve body according to claim 1, characterized in that: The radial dimension of the connecting section is smaller than the radial dimensions of the two fixed end portions.

3. The sealing valve body according to claim 1 or 2, characterized in that: The portion of the inner membrane member located inside the first valve core is not fixed to the first valve core.

4. The sealing valve body according to claim 1 or 2, characterized in that: The inner membrane element includes two fixing portions and a connecting portion located between the two fixing portions. A radial dimension of the connecting portion is smaller than a radial dimension of the two fixing portions.

5. The sealing valve body according to claim 4, characterized in that: The circumferential length of the cross section of the connecting portion is greater than the circumferential length of the cross section of the connecting section.

6. The sealing valve body according to claim 1 or 2, characterized in that: A first clamping member is provided in the base, the first clamping member is located at the distal end of the first valve core and is communicated with the first valve core, the first clamping member includes a first insertion section, the fixed portion at the distal end of the inner membrane member is sleeved on the first insertion section, and the first insertion section is inserted into the fixed end portion at the distal end; A second clamping piece is provided at the proximal end of the base body, the second clamping piece is located at the proximal end of the first valve core and is connected to the first valve core, the second clamping piece includes a second insertion section, the fixed portion of the proximal end of the inner membrane member is sleeved on the second insertion section, and the second insertion section is inserted into the fixed end portion of the proximal end.

7. 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, the second accommodating space is communicated with the first accommodating space, and the first clamping member is located in the second accommodating space; The base includes a distal positioning portion, and an annular boss is provided on the inner circumference of the distal positioning portion for abutting against one side of the first clamping member.

8. The sealing valve body according to claim 7, characterized in that: The sealing valve body also includes a second valve core and a connecting seat for accommodating the second valve core, the proximal end of the connecting seat is connected to the distal positioning portion, and the second valve core is respectively in contact with the distal positioning portion and the first clamping member.

9. The sealing valve body according to claim 1 or 2, characterized in that: The sealing valve body includes an adjusting member and a force transmitting member assembled on the base and movable relative to the base, wherein the force transmitting member is located in the first accommodating space and can squeeze the connecting section of the first valve core; 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 connecting section through the force transmitting member.

10. The sealing valve body according to claim 9, characterized in that: The force transmission member at least squeezes two opposite sides of the connecting section.

11. The sealing valve body according to claim 10, characterized in that: The force transmission member includes a first split body and a second split body, the first split body and the second split body are respectively provided with corresponding extrusion grooves, and the connecting section is located in the extrusion grooves.

12. The sealing valve body according to claim 10, characterized in that: The force transmission member includes a first split body and a second split body, 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 is in contact with the pushing piece.

13. The sealing valve body according to claim 12, characterized in that: The first split body is provided with at least two first protruding teeth protruding toward the connecting section, and a recess is formed between two adjacent first protruding teeth; the second split body is provided with at least one second protruding tooth for pressing toward the recess.

14. The sealing valve body according to claim 7, characterized in that: The base includes 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 piece is provided with an internal thread matched with the external thread, and the adjusting piece can be moved in the axial direction by rotating relative to the wing.

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

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