Sealing valve and conveying sheath

Abstract

The invention provides a sealing valve and a delivery sheath, and the sealing valve comprises a valve body which comprises a main body part which is in the shape of a hollow column with two open ends; the sealing ring is arranged in the main body part of the valve body; the sealing ring is provided with an axial through circulation channel; in a natural state, the length of the circulation channel is larger than or equal to two times of the diameter of the circulation channel, and the outer diameter of the sealing ring is larger than or equal to three times of the inner diameter of the circulation channel. The locking wire is arranged around the sealing ring, and one end part of the locking wire is fixedly connected with the main body part; and the driving structure is movably connected with the valve body, and the driving structure is used for driving the locking wire bundle to tighten the sealing ring, so that the inner wall of the circulation channel is attached to the medical instrument penetrating through the circulation channel. The sealing ring has enough thickness, so that the inner diameter of the circulation channel is uniformly reduced when the sealing ring is tightened, and the sealing ring is better attached to the medical instrument.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a sealing valve and a delivery sheath. Background Art

[0002] The sealing structure used in the existing delivery sheath sealing valve mostly contains one or more sealing gaskets, and grooves or slits are made on the sealing gasket. In the natural state, the slits on the sealing gasket are closed, which plays a role in preventing blood leakage and air from entering the human body; when a medical device passes through the gasket, the slit is opened under the pushing action of the medical device to allow the medical device to pass through, and at the same time, the sealing gasket maintains a fit with the outer peripheral surface of the medical device to ensure the sealing performance of the delivery sheath when the medical device is inserted. However, the existing sealing gasket is mainly sealed by the sealing gasket's own circumferential elasticity. Grooving or slitting on a single sealing gasket will reduce the tear strength of the sealing gasket. When an object with a size slightly larger than the gasket opening, groove, or slit is inserted, the gasket will be damaged to varying degrees. In addition, during the production self-inspection and quality control inspection process, an object with a size slightly larger than the gasket opening, groove, or slit will be inserted, causing damage to the gasket and reducing the sealing performance. At the same time, the currently commonly used sealing gaskets have a very poor sealing effect on devices with uneven surfaces. During surgery, the sheath needs to pass through medical devices with different external dimensions (sheath core, loader, steel cable, etc.). When passing through devices with different circumferential dimensions, the degree of squeezing of the sealing gasket holes, grooves or slits is inconsistent, resulting in inconsistent circumferential elasticity, and thus the sealing effect varies accordingly. Small-sized devices have the weakest sealing. That is, the sheath sealing effect is greatly affected by the size of the sheath seal. Summary of the invention

[0003] Based on this, it is necessary to provide a sealing valve with better sealing effect.

[0004] The present invention provides a sealing valve, comprising:

[0005] The valve body comprises a main body, wherein the main body is in the shape of a hollow column with openings at both ends;

[0006] A sealing ring is arranged in the main body of the valve body; the sealing ring has an axially penetrating flow channel; in a 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 wire, which is arranged around the sealing ring and one end of which is fixedly connected to the main body;

[0008] A driving structure, which is movably connected to the valve body. The driving structure is fixedly connected to the other end of the locking wire. The driving structure is used to drive the locking wire to move, so as to tighten the sealing ring and make the inner wall of the flow channel fit the medical device passing through the flow channel.

[0009] In one embodiment, the sealing ring is made of materials such as rubber and silica gel.

[0010] In one embodiment, the sealing valve further includes a gasket. The gasket is arranged between the locking wire and the sealing ring. Both ends of the gasket in the circumferential direction are free ends, 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 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.

[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 various depths.

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

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

[0015] One of the locking wires starts from one of the fixing blocks, winds around the sealing ring clockwise for at least one circle and then is connected to the driving structure;

[0016] The other locking wire starts from the other fixing block, winds around the sealing ring counterclockwise for at least one circle and then is connected to the driving structure.

[0017] In one embodiment, the valve body further includes a driving part. The driving part is connected to the outer peripheral surface of the main body part, and the driving part is used to connect the driving structure;

[0018] A through hole is provided on the side wall of the main body part. The locking wire passes through the through hole and extends outside the main body part and is connected to the driving structure.

[0019] In one embodiment, the driving part has a driving channel, and the driving channel is communicated with the internal space of the main body part through the through hole on the side wall of the main body part;

[0020] The driving structure includes a slider and a threaded column. The slider is slidably arranged in the driving channel, and the slider is fixedly connected to the end of the locking wire.

[0021] External threads are provided on two opposite sides of the slider, and the external threads are exposed outside the driving part through a sliding groove communicated with the driving channel on the driving part.

[0022] The threaded column has an inner cavity and internal threads are provided on the inner cavity wall. The threaded column is sleeved outside the driving part, and the internal threads are meshed with the external threads of the slider. The slider moves along the sliding groove under the drive of the threaded column.

[0023] The present invention also provides a delivery sheath, which includes any one of the above sealing valves. The delivery sheath further includes a sheath tube. The sheath tube is connected to the distal end of the sealing valve, and the lumen of the sheath tube is communicated with the flow-through channel of the sealing ring.

[0024] The sealing valve of the present invention realizes the sealing of a medical device passing through the flow-through channel by fitting with the medical device through the flow-through channel of the sealing ring. Wherein the length of the flow-through channel is greater than or equal to twice the inner diameter of the flow-through channel, that is, the flow-through channel has sufficient length to fit with the medical device, and has a good sealing effect on a medical device with an uneven surface. Through the driving structure, the sealing ring can be tightened according to actual needs, and the inner diameter of the flow-through channel can be adjusted, so as to improve the sealing performance of the sealing valve for medical devices with different circumferential dimensions. The sealing ring has sufficient thickness so that when the sealing ring is tightened, the inner diameter of the flow-through channel is uniformly reduced, avoiding damage to the medical device caused by local reduction of the inner diameter of the flow-through channel due to the tightening of the locking wire. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0030] Figure 6 is Figure 3Cross-sectional view at A in the [Chinese context];

[0031] Figure 7 Isometric view of the slider in Embodiment 1 of the present invention;

[0032] Figure 8 Front view of the delivery sheath in Embodiment 1 of the present invention;

[0033] Figure 9 Longitudinal sectional view of the sealing ring in Embodiment 2 of the present invention;

[0034] Figure 10 Perspective view of the sealing ring in Embodiment 3 of the present invention;

[0035] Figure 11 Longitudinal sectional view of the sealing ring in Embodiment 3 of the present invention. Detailed implementation manners

[0036] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0038] To more clearly describe the structure of the present application, the terms "proximal end" and "distal end" are defined herein as conventional terms in the field of interventional medicine. Specifically, the "distal end" represents the end far from the operator during the surgical operation, and the "proximal end" represents the end close to the operator during the surgical operation. The terms "proximal side" and "distal side" are defined herein as conventional terms in the field of interventional medicine. Specifically, the "proximal side" represents the end closer to the heart after the medical device is implanted into the human body, and the "distal side" represents the end farther from the heart after the medical device is implanted into the human body. The "axial direction" represents its length direction, and the "radial direction" represents the direction perpendicular to the "axial direction".

[0039] Embodiment 1

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

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

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

[0043] A driving structure 140 is movably connected to the valve body 110, the driving structure 140 is fixedly connected to the other end of the locking wire 130, and the driving structure 140 is configured to drive the locking wire 130 to move, so as to tighten the sealing ring 120, such that the inner wall of the through-flow passage 121 fits against an instrument passing through the through-flow passage 121.

[0044] The sealing valve 100 of the present invention seals an instrument passing through the through-flow passage 121 by fitting the through-flow passage 121 of the sealing ring 120 with the medical instrument, wherein the length of the through-flow passage 121 is greater than or equal to twice the inner diameter of the through-flow passage 121, that is, the through-flow passage 121 has sufficient length to fit with the medical instrument, and has a good sealing effect on medical instruments with uneven surfaces. The driving structure 140 can tighten the sealing ring 120 as needed, adjust the inner diameter of the through-flow passage 121, and improve the sealing performance of the sealing valve 100 for medical instruments with different circumferential dimensions. The sealing ring 120 has sufficient thickness such that when the sealing ring 120 is tightened, the inner diameter of the through-flow passage 121 uniformly decreases, avoiding damage to the medical instrument due to local reduction of the inner diameter of the through-flow passage 121 caused by the tightening of the locking wire 130.

[0045] In this embodiment, the sealing ring 120 is made of materials such as rubber and silica gel. When subjected to the binding force of the locking wire 130, the sealing ring 120 deforms, causing the inner diameter of the flow passage 121 to decrease. In this embodiment, the outer diameter of the sealing ring 120 is 3.4 times the inner diameter of the flow passage 121, and the length of the sealing ring 120 is 3.2 times the inner diameter of the flow passage 121. Since the wall thickness of the sealing ring 120 in this embodiment is relatively thick, when the sealing ring 120 is subjected to the binding of the locking wire 130, the portion of the sealing ring 120 in contact with the locking wire 130 and the area around this portion will jointly move towards the central axis direction of the sealing ring 120, while only the portion of the thin-walled sealing ring in contact with the locking wire 130 deforms when subjected to the constricting action of the locking wire 130. Therefore, when the sealing ring 120 in this embodiment is subjected to the constricting action of the locking wire 130, in the length direction, the flow passage 121 has a greater length to fit with the medical device, fits with the medical device at more positions, improving the sealing performance of the sealing ring 120, and there is no need to further squeeze the sealing ring 120 to improve the fitting degree between the flow passage 121 and the medical device, avoiding the collapse of the medical device (especially the thin-walled tubular medical device) due to excessive extrusion.

[0046] In some embodiments, the sealing valve 100 includes a plurality of the locking wires 130, and the locking wires 130 are spaced apart in the axial direction of the sealing ring 120. By simultaneously constricting the locking wires 130, the sealing ring 120 is constricted more evenly, and the inner diameter of the flow passage 121 is evenly narrowed, avoiding excessive narrowing of local positions of the flow passage 121 and damaging the medical device passing through the flow passage 121.

[0047] In this embodiment, the sealing valve 100 further includes a gasket 150. The gasket 150 is disposed between the locking wire 130 and the sealing ring 120. Both ends of the gasket 150 in the circumferential direction are free ends, and the length of the gasket 150 in 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 constricted, the two ends of the gasket 150 move relative to each other, thereby reducing the volume enclosed by the gasket 150, that is, squeezing the sealing ring 120 located within the gasket 150.

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

[0049] Such as Figure 2As shown, the valve body 110 further includes a fixing block 112. The fixing block 112 is disposed between the inner wall surface of the main body portion 111 and the outer peripheral surface of the sealing ring 120, and the fixing block 112 is fixedly connected to the main body portion 111. In this embodiment, the fixing block 112 and the main body portion 111 are integrally formed. As Figure 2 shown, at least one groove 1121 is provided on the side of the fixing block 112, facilitating the winding of the locking wire 130 around the fixing block 112 to fix the locking wire 130.

[0050] In this embodiment, as Figure 3 shown, the sealing valve 100 includes two fixing blocks 112 and two locking wires 130a, 130b; as Figure 3 and Figure 4 shown, one of the locking wires 130a starts from one of the fixing blocks 112, winds around the sealing ring 120 clockwise for at least one turn and then is connected to the driving structure 140 ( Figure 4 the P direction in is the clockwise direction); as Figure 3 and Figure 5 shown, the other locking wire 130 starts from the other fixing block 112, winds around the sealing ring 120 counterclockwise for at least one turn and then is connected to the driving structure 140 ( Figure 5 the Q direction in is the counterclockwise direction). By providing two locking wires 130a, 130b and winding the sealing ring 120 from opposite directions, when the operator drives the driving structure 140 to constrict the sealing ring 120, the locking wires 130a, 130b constrict the sealing ring 120 from two directions, making the force on the sealing ring 120 more uniform and preventing the sealing ring 120 from shifting (for ease of illustration, in Figures 3 to 5 , the locking wire winding around the sealing ring 120 clockwise is labeled as 130a, and the locking wire winding around the sealing ring 120 counterclockwise is labeled as 130b).

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

[0052] The valve body 110 further includes a wire winding post 114 which is arranged inside the main body portion 111 and integrally formed with the main body portion 111. The wire winding post 114 is arranged in front of the through hole 1111 and has an arc-shaped outer peripheral surface. The locking wire 130 adjusts its extending direction by surrounding the wire winding post 114.

[0053] Combined with Figure 1 、 Figure 2 and Figure 6 , the driving portion 113 has a sliding groove 1131 which is communicated with the inner space of the main body portion 111 through the through hole 1111 on the side wall of the main body portion 111; the driving structure 140 includes a slider 141 and a threaded post 142. The slider 141 is slidably arranged in the sliding groove 1131, and the slider 141 is fixedly connected with the end of the locking wire 130. External threads 1411 are arranged on two opposite side surfaces of the slider 141, and the external threads 1411 are exposed outside the sliding groove 1131. The threaded post 142 has an inner cavity and internal threads 1421 are arranged on the inner cavity wall. The threaded post 142 is sleeved outside the driving portion 113 and can rotate relative to the driving portion 113. The internal threads 1421 are engaged with the external threads 1411 of the slider 141. When the threaded post 142 rotates, it drives the slider 141 to move along the sliding groove 1131, so as to tighten or loosen the locking wire 130 fixed on the slider 141.

[0054] In other embodiments, the driving structure includes a knob rotatably connected to the main body portion. One end of the locking wire is fixed to the fixed block, and the other end is fixed to the knob. The locking wire is wound around the knob as the knob rotates, so as to constrict the sealing ring.

[0055] The present invention also provides a delivery sheath. As Figure 8 shown, the delivery sheath in this embodiment includes any one of the above-mentioned sealing valves 100. The delivery sheath further 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 is communicated with the flow passage of the sealing ring. A medical device is inserted into the flow passage 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] Embodiment 2

[0057] The sealing valve in Embodiment 2 is basically the same as the sealing valve in Embodiment 1. The main difference is that, as Figure 9As shown, a plurality of slits 222 are provided on the inner wall surface of the sealing ring 220 in this embodiment. 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] Since the sealing ring 220 is deformed under the tightening action of the locking wire, the inner diameter of the flow passage 221 of the sealing ring 220 is narrowed. Therefore, providing the slits 222 can provide a deformation space for the sealing ring 220. At most only one end of the slit 222 penetrates the proximal end face or the 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 without penetrating the proximal end face 223 / distal end face 224 of the sealing ring, or both ends of the slit 222 do not penetrate the proximal end face 223 or the distal end face 224 of the sealing ring 220. Therefore, blood or air cannot pass through the sealing ring 220 via the slits 222. The plurality of slits 222 have the same or different lengths and are distributed in a staggered manner on the inner wall surface of the sealing ring 220, but at least one of the slits 222 passes through any cross-section of the sealing ring 220. Therefore, there is a deformation space when being squeezed at any position in the axial direction of the sealing ring 220.

[0059] Embodiment 3

[0060] The structure of the sealing valve in Embodiment 3 is basically the same as that of the sealing valve in Embodiment 1. The main difference is that, as Figure 10 shown, a plurality of blind holes 322 are provided on both end faces of the sealing ring 320. The plurality of blind holes 322 have various depths. As Figure 11 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 to form the flow passage 321 of the sealing ring 320. There are a plurality of connecting blocks 325 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 different. Specifically, as Figure 11 shown, a plurality of first blind holes 322a and a plurality of second blind holes 322b are provided on the sealing ring 320. The first blind holes 322a extend from the proximal end face 326 of the sealing ring 320 towards 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 towards the proximal end, but do not penetrate the proximal end face 326. The area between the first blind hole 322a and the second blind hole 322b that are opposite to each other in the axial direction of the sealing ring 320 forms the connecting block 325.

[0061] When the sealing ring 320 is subjected to the constricting 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 more prone to deformation, thereby improving the degree of fit between the flow channel 321 and the medical device passing through the flow channel 321. The connecting block 325 is used to conduct the circumferential acting force. The connecting block 325 is located at different positions in the axial direction and the circumferential direction of the sealing ring 320. When the outer layer structure 324 is subjected to the circumferential acting force, the inner layer structure 323 can be squeezed from multiple angles and multiple positions through the connecting block 325, so that the inner diameter of the flow channel 321 is narrowed more uniformly.

[0062] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0063] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A sealing valve, characterized in that, it comprises: a valve body, which includes a main body portion, and the main body portion is a hollow cylindrical shape with openings at both ends; a sealing ring, which is arranged inside the main body portion of the valve body; the sealing ring has a through-flow channel axially penetrating therethrough; in a natural state, the length of the through-flow channel is greater than or equal to twice the inner diameter of the through-flow channel, and the outer diameter of the sealing ring is greater than or equal to three times the inner diameter of the through-flow channel; a locking wire, which is arranged around the sealing ring, and one end thereof is fixedly connected to the main body portion; a driving structure, which is movably connected to the valve body, the driving structure is fixedly connected to the other end of the locking wire, and the driving structure is used to drive the locking wire to move, so as to tighten the sealing ring, and make the inner wall of the through-flow channel fit the medical device passing through the through-flow channel.

2. The sealing valve according to claim 1, characterized in that, the sealing ring is made of materials such as rubber and silica gel.

3. The sealing valve according to claim 2, characterized in that, the sealing valve further comprises a gasket, the gasket is arranged between the locking wire and the sealing ring, both ends of the gasket in the circumferential direction are free ends, and the length of the gasket in the circumferential direction of the sealing ring is greater than or equal to the circumference of the sealing ring.

4. The sealing valve according to claim 3, characterized in that, a plurality of slits are arranged on the inner wall surface of the sealing ring, the slits 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.

5. The conveying system according to claim 3, characterized in that, a plurality of blind holes are arranged on both end faces of the sealing ring, and the plurality of blind holes have various depths.

6. The sealing valve according to claim 1, characterized in that, the valve body further comprises a fixing block, the fixing block is arranged between the inner wall surface of the main body portion and the outer peripheral surface of the sealing ring, and the fixing block is fixedly connected to the main body portion, and the locking wire is fixedly connected to the fixing block.

7. The sealing valve according to claim 6, characterized in that, the sealing valve comprises two said fixing blocks and two said locking wires; one of the locking wires starts from one of the fixing blocks, winds around the sealing ring clockwise for at least one circle and then is connected to the driving structure; the other locking wire starts from the other fixing block, winds around the sealing ring counterclockwise for at least one circle and then is connected to the driving structure.

8. The sealing valve according to claim 1, characterized in that, the valve body further comprises a driving portion, the driving portion is connected to the outer peripheral surface of the main body portion, and the driving portion is used to connect the driving structure; a through hole is arranged on the side wall of the main body portion, and the locking wire passes through the through hole and extends outside the main body portion and is connected to the driving structure.

9. The sealing valve according to claim 8, characterized in that, the driving portion has a sliding groove, and the sliding groove is communicated with the inner space of the main body portion through the through hole on the side wall of the main body portion; The driving structure includes a slider and a threaded column. The slider is slidably arranged in the chute, and the slider is fixedly connected to the end of the locking wire; External threads are provided on two opposite sides of the slider, and the external threads are exposed outside the chute; The threaded column has an inner cavity and internal threads are provided on the inner cavity wall. The threaded column is sleeved outside the driving part. The internal threads are engaged with the external threads of the slider, and the slider moves along the chute under the drive of the threaded column.

10. A delivery sheath, characterized in that, it includes the sealing valve according to any one of claims 1-9; The delivery sheath further includes a sheath tube. The sheath tube is connected to the distal end of the sealing valve, and the lumen of the sheath tube is communicated with the flow passage of the sealing ring.

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