A sealed valve and delivery sheath

Abstract

This invention provides a sealing valve and a delivery sheath. The sealing valve includes: a valve body comprising a main body portion, the main body portion being a hollow cylindrical shape open at both ends; a sealing ring disposed within the main body portion of the valve body; the sealing ring having an axially penetrating flow channel; in its natural state, the length of the flow channel is greater than or equal to twice the diameter of the flow channel, and the outer diameter of the sealing ring is greater than or equal to three times the inner diameter of the flow channel; a locking wire surrounding the sealing ring, one end of which is fixedly connected to the main body portion; and a drive structure movably connected to the valve body, the drive structure being used to drive the locking wire to tighten the sealing ring, causing the inner wall of the flow channel to conform to a medical device passing through the flow channel. The sealing ring has sufficient thickness to uniformly reduce the inner diameter of the flow channel when the sealing ring is tightened, thus better conforming to the medical device.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a sealing valve and delivery sheath. Background Technology

[0002] Existing delivery sheath sealing valves typically employ a sealing structure containing one or more gaskets with grooves or slits. Under normal conditions, these slits close, preventing blood leakage and air entry into the body. When a medical device passes through the gasket, the slits open under the device's pushing force, allowing passage while the gasket maintains contact with the device's outer circumference, ensuring a tight seal during insertion. However, existing gaskets primarily rely on their own circumferential elasticity for sealing. Grooving or slitting individual gaskets reduces their tear resistance. When objects slightly larger than the gasket's openings, grooves, or slits are inserted, the gaskets suffer varying degrees of damage. Furthermore, during production inspections and quality control checks, objects slightly larger than the gasket's openings, grooves, or slits may be inserted, damaging the gaskets and reducing sealing performance. Additionally, currently used gaskets provide poor sealing for devices with uneven surfaces. During surgery, the sheath needs to pass through medical instruments of varying external dimensions (sheath cores, loaders, steel cables, etc.). When passing through instruments with different circumferential dimensions, the sealing gasket holes, grooves, or slits are compressed to varying degrees, resulting in inconsistent circumferential elasticity and thus varying sealing performance. Smaller-sized devices provide the weakest seal. In other words, the sheath sealing effect is significantly affected by the size of the sealing components passing through the sheath. Summary of the Invention

[0003] Therefore, it is necessary to provide a sealing valve with better sealing performance.

[0004] This invention provides a sealing valve, comprising:

[0005] The valve body includes a main body that is a hollow cylindrical shape with openings at both ends;

[0006] A sealing ring is disposed within the main body of the valve body; the sealing ring has an axially penetrating flow channel; in its natural state, the length of the flow channel is greater than or equal to twice the inner diameter of the flow channel, and the outer diameter of the sealing ring is greater than or equal to three times the inner diameter of the flow channel;

[0007] A locking screw is provided around the sealing ring, and one end of which is fixedly connected to the main body.

[0008] A drive structure is movably connected to the valve body and fixedly connected to the other end of the locking wire. The drive structure is used to move the locking wire, thereby tightening the sealing ring and making the inner wall of the flow channel fit against the medical device passing through the flow channel.

[0009] In one embodiment, the sealing ring is made of materials such as rubber or silicone.

[0010] In one embodiment, the sealing valve further includes a gasket disposed between the locking screw and the sealing ring. The gasket has two free ends in the circumferential direction, and the length of the gasket along the circumferential direction of the sealing ring is greater than or equal to the circumference of the sealing ring.

[0011] In one embodiment, a plurality of slits are provided on the inner wall surface of the sealing ring, the slits extending along the axial direction of the sealing ring, and at most only one end of the slit penetrates the proximal end face or the distal end face of the sealing ring.

[0012] In one embodiment, a plurality of blind holes are provided on both end faces of the sealing ring, and the plurality of blind holes have a variety of depths.

[0013] In one embodiment, the valve body further includes a fixing block disposed between the inner wall surface of the main body and the outer peripheral surface of the sealing ring, and the fixing block is fixedly connected to the main body, and the locking screw is fixedly connected to the fixing block.

[0014] In one embodiment, the sealing valve includes two of the fixing blocks and two of the locking screws;

[0015] One of the locking wires originates from one of the fixing blocks, circles the sealing ring clockwise at least once, and then connects to the drive structure;

[0016] Another locking wire originates from another fixing block, circles the sealing ring counterclockwise at least once, and then connects to the drive structure.

[0017] In one embodiment, the valve body further includes a drive unit connected to the outer peripheral surface of the main body, the drive unit being used to connect the drive structure;

[0018] A through hole is provided on the side wall of the main body, and the locking screw passes through the through hole to the outside of the main body and is connected to the drive structure.

[0019] In one embodiment, the driving part has a driving channel that communicates with the internal space of the main body through a through hole in the side wall of the main body;

[0020] The driving structure includes a slider and a threaded post. The slider is slidably disposed in the driving channel and is fixedly connected to the end of the locking screw.

[0021] The slider has external threads on two opposite sides, and the external threads are exposed on the drive part through a groove that communicates with the drive channel.

[0022] The threaded post has an inner cavity and an internal thread on the inner cavity wall. The threaded post is sleeved outside the driving part. The internal thread engages with the external thread of the slider. The slider moves along the groove under the drive of the threaded post.

[0023] The present invention also provides a delivery sheath comprising any of the sealing valves described above, the delivery sheath further comprising a sheath tube connected to the distal end of the sealing valve, and the lumen of the sheath tube communicating with the flow channel of the sealing ring.

[0024] The sealing valve of this invention achieves sealing of medical devices passing through the flow channel by fitting the flow channel of the sealing ring. The length of the flow channel is greater than or equal to twice its inner diameter, meaning the flow channel has sufficient length to fit the medical device, providing a good sealing effect for medical devices with uneven surfaces. The driving structure can tighten the sealing ring as needed, adjusting the inner diameter of the flow channel and improving the sealing performance of the valve for medical devices with different circumferential dimensions. The sealing ring has sufficient thickness to ensure that the inner diameter of the flow channel decreases uniformly when the sealing ring is tightened, preventing damage to the medical device caused by localized reduction in the inner diameter of the flow channel due to the tightening of the locking wire. Attached Figure Description

[0025] Figure 1 This is an exploded view of the sealing valve in Embodiment 1 of the present invention;

[0026] Figure 2 This is a perspective view of the valve body in Embodiment 1 of the present invention;

[0027] Figure 3 This is a top view of the sealing valve in Embodiment 1 of the present invention;

[0028] Figure 4 This is a top view of one of the locking wires (clockwise rotation) in Embodiment 1 of the present invention;

[0029] Figure 5 This is a top view of another locking wire (rotating counterclockwise) in Embodiment 1 of the present invention;

[0030] Figure 6 for Figure 3Cross-sectional view at point A;

[0031] Figure 7 This is a perspective view of the slider in Embodiment 1 of the present invention;

[0032] Figure 8 This is a front view of the delivery sheath in Embodiment 1 of the present invention;

[0033] Figure 9 This is a longitudinal sectional view of the sealing ring in Embodiment 2 of the present invention;

[0034] Figure 10 This is a perspective view of the sealing ring in Embodiment 3 of the present invention;

[0035] Figure 11 This is a longitudinal sectional view of the sealing ring in Embodiment 3 of the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] To more clearly describe the structure of this application, the terms "proximal" and "distal" are used herein as conventional terms in the field of interventional medicine. Specifically, "distal" refers to the end furthest from the operator during the surgical procedure, and "proximal" refers to the end closest to the operator during the surgical procedure. The terms "proximal" and "distal" are also used herein as conventional terms in the field of interventional medicine. Specifically, "proximal" refers to the end of the medical device implanted in the human body closer to the heart, and "distal" refers to the end of the medical device implanted in the human body further away from the heart. "Axial" refers to its length direction, and "radial" refers to the direction perpendicular to the "axial" direction.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides a sealing valve 100, including: a valve body 110, which includes a main body 111, the main body 111 being a hollow cylindrical shape with openings at both ends;

[0041] A sealing ring 120 is disposed within the main body 111 of the valve body 110; the sealing ring 120 has a through flow channel 121; in its natural state, the length of the flow channel 121 is greater than or equal to twice the diameter of the flow channel 121.

[0042] A locking screw 130 is disposed around the sealing ring 120, and one end of which is fixedly connected to the main body 111;

[0043] A drive structure 140 is movably connected to the valve body 110. The drive structure 140 is fixedly connected to the other end of the locking wire 130. The drive structure 140 is used to drive the locking wire 130 to move, thereby tightening the sealing ring 120 and making the inner wall of the flow channel 121 fit against the instrument passing through the flow channel 121.

[0044] The sealing valve 100 of the present invention achieves sealing of the medical device passing through the flow channel 121 of the sealing ring 120 by fitting the flow channel 121 together with the medical device. The length of the flow channel 121 is greater than or equal to twice its inner diameter, meaning the flow channel 121 has sufficient length to fit the medical device, providing a good sealing effect for medical devices with uneven surfaces. The driving structure 140 can tighten the sealing ring 120 as needed, adjusting the inner diameter of the flow channel 121 and improving the sealing performance of the sealing valve 100 for medical devices with different circumferential dimensions. The sealing ring 120 has sufficient thickness so that the inner diameter of the flow channel 121 decreases uniformly when the sealing ring 120 is tightened, avoiding damage to the medical device caused by localized reduction in the inner diameter of the flow channel 121 due to the tightening of the locking wire 130.

[0045] In this embodiment, the sealing ring 120 is made of materials such as rubber or silicone. When subjected to the binding force of the locking wire 130, the sealing ring 120 deforms, causing the inner diameter of the flow channel 121 to shrink. In this embodiment, the outer diameter of the sealing ring 120 is 3.4 times the inner diameter of the flow channel 121, and the length of the sealing ring 120 is 3.2 times the inner diameter of the flow channel 121. Because the sealing ring 120 in this embodiment has a thicker wall, when the sealing ring 120 is bound by the locking wire 130, the part of the sealing ring 120 that contacts the locking wire 130 and the area around that part will move together towards the central axis of the sealing ring 120. In contrast, when the thin-walled sealing ring is subjected to the constricting effect of the locking wire 130, only the part that contacts the locking wire 130 deforms. Therefore, when the sealing ring 120 of this embodiment is subjected to the tightening action of the locking wire 130, the flow channel 121 has a longer length in the longitudinal direction to fit with the medical device, and fits with the medical device at more positions, thereby improving the sealing performance of the sealing ring 120. It is not necessary to further compress the sealing ring 120 to improve the fit between the flow channel 121 and the medical device, thus avoiding the medical device (especially thin-walled tubular medical devices) from collapsing due to excessive compression.

[0046] In some embodiments, the sealing valve 100 includes a plurality of locking wires 130, which are spaced apart in the axial direction of the sealing ring 120. The locking wires 130 are also tightened to make the sealing ring 120 tighten more evenly, and the inner diameter of the flow channel 121 is narrowed evenly to avoid excessive narrowing of local parts of the flow channel 121 and damage to the medical device inserted in the flow channel 121.

[0047] In this embodiment, the sealing valve 100 further includes a gasket 150, which is disposed between the locking wire 130 and the sealing ring 120. Both ends of the gasket 150 are free ends in the circumferential direction, and the length of the gasket 150 along the circumferential direction of the sealing ring 120 is greater than or equal to the circumference of the sealing ring 120. When the locking wire 130 is tightened, the two ends of the gasket 150 move relative to each other, thereby reducing the volume enclosed by the gasket 150, i.e., compressing the sealing ring 120 located within the gasket 150.

[0048] In this embodiment, the gasket 150 is made of hard plastic or metal sheet. Due to the presence of the gasket 150, the binding force of the locking wire 130 acts on the gasket 150, first tightening the gasket 150. The gasket 150 evenly squeezes the sealing ring 120, making the flow channel 121 of the sealing ring 120 narrower more evenly.

[0049] like Figure 2As shown, the valve body 110 also includes a fixing block 112, which is disposed between the inner wall surface of the main body 111 and the outer peripheral surface of the sealing ring 120, and is fixedly connected to the main body 111. In this embodiment, the fixing block 112 and the main body 111 are integrally formed. Figure 2 As shown, the side of the fixing block 112 has at least one groove 1121, which facilitates the locking wire 130 to be wound around the fixing block 112 to fix the locking wire 130.

[0050] In this embodiment, as Figure 3 As shown, the sealing valve 100 includes two fixing blocks 112 and two locking screws 130a and 130b; Figure 3 and Figure 4 As shown, one of the locking wires 130a originates from one of the fixing blocks 112, circles the sealing ring 120 clockwise at least once, and then connects to the drive structure 140. Figure 4 In this context, P is in the clockwise direction; for example... Figure 3 and Figure 5 As shown, another locking wire 130 originates from another fixing block 112, wraps counterclockwise around the sealing ring 120 at least once, and then connects to the drive structure 140. Figure 5 (The Q direction in the diagram is counterclockwise). Two locking wires 130a and 130b are provided and wound around the sealing ring 120 from opposite directions. When the operator drives the drive structure 140 to tighten the sealing ring 120, the locking wires 130a and 130b tighten the sealing ring 120 from two directions, making the force on the sealing ring 120 more even and preventing the sealing ring 120 from shifting (for ease of explanation, in...). Figures 3 to 5 In the diagram, the locking thread that winds clockwise around the sealing ring 120 is marked as 130a, and the locking thread that winds counterclockwise around the sealing ring 120 is marked as 130b.

[0051] In this embodiment, looking back Figure 2 The valve body 110 further includes a drive part 113, which is connected to the outer peripheral surface of the main body 111 and is used to connect the drive structure 140. A through hole 1111 is provided on the side wall of the main body 111, and the locking screw 130 passes through the through hole 1111 to the outside of the main body 111 and is connected to the drive structure 140.

[0052] The valve body 110 also includes a winding post 114, which is disposed within the main body 111 and integrally formed with the main body 111. The winding post 114 is disposed in front of the through hole 1111 and has an arc-shaped outer peripheral surface. The locking wire 130 adjusts its extension direction by wrapping around the winding post 114.

[0053] Combination Figure 1 , Figure 2 and Figure 6 The driving part 113 has a groove 1131, which communicates with the internal space of the main body 111 through a through hole 1111 in the side wall of the main body 111; the driving structure 140 includes a slider 141 and a threaded post 142, the slider 141 is slidably disposed in the groove 1131, and the slider 141 is fixedly connected to the end of the locking screw 130; the two opposite sides of the slider 141 are provided with external threads 1411, and the external threads... The thread 1411 is exposed in the slide groove 1131; the threaded post 142 has an inner cavity and an internal thread 1421 is provided on the inner cavity wall. The threaded post 142 is sleeved outside the drive part 113 and can rotate relative to the drive part 113. The internal thread 1421 meshes with the external thread 1411 of the slider 141. When the threaded post 142 rotates, it drives the slider 141 to move along the slide groove 1131, thereby tightening or loosening the locking wire 130 fixed on the slider 141.

[0054] In other embodiments, the drive structure includes a knob rotatably connected to the main body, one end of the locking wire is fixed to the fixing block, the other end is fixed to the knob, and the locking wire winds around the knob as the knob rotates, thereby tightening the sealing ring.

[0055] The present invention also provides a delivery sheath, such as Figure 8 As shown, the delivery sheath of this embodiment includes any of the aforementioned sealing valves 100. The delivery sheath also includes a sheath tube 200, which is connected to the distal end of the sealing valve 100, and the lumen of the sheath tube 200 communicates with the flow channel of the sealing ring. The medical device is inserted into the flow channel from the proximal end of the sealing valve 100 and then reaches the treatment site of the human body through the sheath tube 200.

[0056] Example 2

[0057] The sealing valve in Example 2 has a basically the same structure as the sealing valve in Example 1, the main difference being that, for example... Figure 9As shown, in this embodiment, a plurality of slits 222 are provided on the inner wall surface of the sealing ring 220. The slits 222 extend along the axial direction of the sealing ring 220, and at most only one end of the slit 222 penetrates the proximal end face or the distal end face of the sealing ring 220.

[0058] Because the sealing ring 220 deforms under the tightening action of the locking wire, narrowing the inner diameter of the flow channel 221 of the sealing ring 220, the slit 222 provides deformation space for the sealing ring 220. At most one end of the slit 222 penetrates the proximal or distal end face of the sealing ring 220. For example, the slit 222 penetrates the distal end face 224 / proximal end face 223 of the sealing ring 220 but not the proximal end face 223 / distal end face 224, or neither end of the slit 222 penetrates the proximal end face 223 or distal end face 224 of the sealing ring 220. Therefore, blood or air cannot pass through the sealing ring 220 via the slit 222. The plurality of slits 222 have the same or different lengths and are staggered on the inner wall surface of the sealing ring 220, but any cross-section of the sealing ring 220 passes through at least one of the slits 222. Therefore, the sealing ring 220 has deformation space when it is compressed at any position in the axial direction.

[0059] Example 3

[0060] The sealing valve in Example 3 has a basically the same structure as the sealing valve in Example 1, the main difference being that, for example... Figure 10 As shown, multiple blind holes 322 are provided on both end faces of the sealing ring 320, and the multiple blind holes 322 have various depths. Figure 11 As shown, after the plurality of blind holes 322 are provided on the sealing ring 320, the sealing ring 320 has an inner layer structure 323 and an outer layer structure 324. The inner layer structure 323 encloses and forms a flow channel 321 of the sealing ring 320. A plurality of connecting blocks 325 are provided between the inner layer structure 323 and the outer layer structure 324. The positions of the plurality of connecting blocks 325 in the axial direction of the sealing ring 320 are not the same. Specifically, as... Figure 11 As shown, the sealing ring 320 is provided with a plurality of first blind holes 322a and a plurality of second blind holes 322b. The first blind holes 322a extend from the proximal end face 326 of the sealing ring 320 to the distal end, but do not penetrate the distal end face 327; the second blind holes 322b extend from the distal end face 327 of the sealing ring 320 to the proximal end, but do not penetrate the proximal end face 326. The connecting block 325 is formed in the region between the first blind holes 322a and the second blind holes 322b that are directly opposite each other in the axial direction of the sealing ring 320.

[0061] When the sealing ring 320 is subjected to the tightening force of the locking wire, the blind hole 322 provides a certain deformation space for the deformation of the inner layer structure 323, making the inner layer structure 323 easier to deform, thereby improving the fit between the flow channel 321 and the medical device inserted in the flow channel 321. The connecting block 325 is used to transmit circumferential force. The connecting block 325 is located at different positions in the axial and circumferential directions of the sealing ring 320. When the outer layer structure 324 is subjected to circumferential force, the connecting block 325 can squeeze the inner layer structure 323 from multiple angles and positions, making the inner diameter of the flow channel 321 narrower more uniformly.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A sealing valve, characterized in that, include: The valve body includes a main body that is a hollow cylindrical shape with openings at both ends; A sealing ring is disposed within the main body of the valve body; the sealing ring has an axially penetrating flow channel; In its natural state, the length of the flow channel is greater than or equal to twice the inner diameter of the flow channel, and the outer diameter of the sealing ring is greater than or equal to three times the inner diameter of the flow channel; A locking screw is provided around the sealing ring, and one end of which is fixedly connected to the main body. A gasket is disposed between the locking screw and the sealing ring. Both ends of the gasket are free ends in the circumferential direction, and the length of the gasket along the circumferential direction of the sealing ring is greater than or equal to the circumference of the sealing ring. A drive structure is movably connected to the valve body and fixedly connected to the other end of the locking screw. The drive structure is used to move the locking screw to reduce the enclosed volume of the gasket and squeeze the sealing ring located inside the gasket, thereby tightening the sealing ring and making the inner wall of the flow channel fit against the medical device passing through the flow channel.

2. The sealing valve according to claim 1, characterized in that, The sealing ring is made of rubber or silicone.

3. The sealing valve according to claim 1, characterized in that, The inner wall surface of the sealing ring is provided with a plurality of slits, which extend along the axial direction of the sealing ring, and at most only one end of the slit penetrates the proximal end face or the distal end face of the sealing ring.

4. The sealing valve according to claim 1, characterized in that, The sealing ring has multiple blind holes on both end faces, and the multiple blind holes have various depths.

5. The sealing valve according to claim 1, characterized in that, The valve body also includes a fixing block, which is disposed between the inner wall surface of the main body and the outer peripheral surface of the sealing ring, and the fixing block is fixedly connected to the main body, and the locking screw is fixedly connected to the fixing block.

6. The sealing valve according to claim 5, characterized in that, The sealing valve includes two of the fixing blocks and two of the locking screws; One of the locking wires originates from one of the fixing blocks, circles the sealing ring clockwise at least once, and then connects to the drive structure; Another locking wire originates from another fixing block, circles the sealing ring counterclockwise at least once, and then connects to the drive structure.

7. The sealing valve according to claim 1, characterized in that, The valve body further includes a drive unit, which is connected to the outer peripheral surface of the main body and is used to connect the drive structure. A through hole is provided on the side wall of the main body, and the locking screw passes through the through hole to the outside of the main body and is connected to the drive structure.

8. The sealing valve according to claim 7, characterized in that, The drive unit has a sliding groove, which communicates with the internal space of the main body through a through hole in the side wall of the main body; The driving structure includes a slider and a threaded post. The slider is slidably disposed in the groove and is fixedly connected to the end of the locking screw. The slider has external threads on two opposite sides, and the external threads are exposed in the groove. The threaded post has an inner cavity and an internal thread on the inner cavity wall. The threaded post is sleeved outside the driving part. The internal thread engages with the external thread of the slider. The slider moves along the groove under the drive of the threaded post.

9. A conveying sheath, characterized in that, Includes the sealing valve according to any one of claims 1-8; The delivery sheath also includes a sheath tube connected to the distal end of the sealing valve, and the lumen of the sheath tube is in communication with the flow channel of the sealing ring.

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