Interventional delivery bailout device

Abstract

The application belongs to the technical field of medical devices, and particularly discloses an interventional delivery release device, which comprises a delivery tube and a release assembly. The distal end of the delivery tube is provided with a positioning hole and an elastic plate. The release assembly comprises a release wire and a spring arranged in the delivery tube. The release wire is located on the side of the spring away from the positioning hole along the center line direction of the positioning hole. The elastic plate extrudes the spring on the side facing the delivery tube. The inner wall of the delivery tube, the peripheral part of the release wire and the outer periphery of the spring are sequentially abutted, and the distal end of the spring is abutted with the distal end hole wall of the positioning hole. The distal end hole wall of the positioning hole is arranged to protrude from the outer periphery of the spring along the radial direction of the delivery tube.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an interventional delivery and release device. Background Technology

[0002] In minimally invasive treatment of vascular diseases, it is often necessary to use an interventional delivery and release device to deliver an implant that can achieve the expected therapeutic effect to the lesion site via blood vessels. After the implant is placed in the target position of the lesion site, the implant needs to be removed from the device to remain in the target position.

[0003] In related technologies, the separation of the implant from the interventional delivery and release device can be accomplished by electrical release. The implant and the interventional delivery and release device are connected by a solder joint. Electrical release uses the current emitted by the release device to melt the solder joint. However, the release time for melting the solder joint may be relatively long, and a longer release time may bring additional risks to the surgery. Summary of the Invention

[0004] The purpose of this invention is to provide an interventional delivery and release device that can achieve rapid separation from the implant.

[0005] To achieve this objective, the present invention adopts the following technical solution: An interventional delivery and release device is provided, comprising: A conveying pipe, wherein a positioning hole and an elastic plate are provided on the peripheral part of the distal end of the conveying pipe; A release assembly includes a release wire and a spring disposed within a delivery tube, the release wire being located on the side of the spring away from the positioning hole along the centerline direction of the positioning hole, the spring being used to connect the implant; The inner wall of the conveying pipe, the periphery of the release wire, and the outer periphery of the spring abut against each other in sequence. The distal end of the spring abuts against the distal end wall of the positioning hole, and the distal end wall of the positioning hole protrudes from the outer periphery of the spring along the radial direction of the conveying pipe. The elastic plate compresses the spring on the side facing the inside of the delivery pipe.

[0006] Optionally, the elastic plate is formed by extending the proximal wall of the positioning hole, and the portion of the elastic plate that contacts the spring is a concave arc surface.

[0007] Optionally, the elastic plate includes a straight plate segment and an arc-shaped plate segment connected sequentially from the proximal end to the distal end, the arc-shaped plate segment abutting against the proximal outer edge of the spring exposed in the positioning hole; Alternatively, the elastic plate includes a first straight segment, a second straight segment, and an arc segment connected sequentially from the proximal end to the distal end. The first straight segment and the second straight segment are arranged at an angle. The arc segment is bent relative to the second straight segment in a direction away from the axis of the delivery pipe. The second straight segment abuts against the outer periphery or proximal edge of the spring exposed in the positioning hole. Alternatively, the elastic plate is elongated, with the side of the elastic plate facing into the delivery tube abutting against the proximal periphery of the spring protruding from the positioning hole.

[0008] Optionally, the spring includes a ring at the distal end, the ring abutting against the distal wall of the positioning hole.

[0009] Optionally, the distal end of the ring is set as a plane or an arc surface.

[0010] Optionally, the length L of the spring along the axial direction of the conveying pipe is greater than the distance S1 between the distal end of the elastic plate and the distal end of the positioning hole; And / or, the relationship between the distance S2 between the inner edges of the two opposite sidewalls of the positioning hole arranged along the circumference of the conveying pipe, the outer diameter D of the spring, and the wire diameter d2 of the spring is: d2(2D-d2)≥(S2) 2 ; And / or, the relationship between the width B of the elastic plate and the outer diameter D of the spring is: B ≥ 0.5D.

[0011] Optionally, the relationship between the inner diameter d1 of the conveying pipe, the wall thickness t of the conveying pipe, the outer diameter D of the spring, and the wire diameter d of the release wire is: d1+t>D+d>d1; Alternatively, the proximal outer diameter D1 of the spring is smaller than the distal outer diameter D2 of the spring, and the relationship between the inner diameter d1 of the conveying tube, the wall thickness t of the conveying tube, the proximal outer diameter D1 and the distal outer diameter D2 of the spring, and the wire diameter d of the release wire is: d1+t>(D1+D2) / 2+d>d1.

[0012] Optionally, the spring is configured as a constant pitch spring; and / or, the relationship between the spring pitch p and the spring wire diameter d2 is: d2 / 2≤p / 2≤d2.

[0013] Optionally, the interventional delivery and release device further includes a connecting rod, the proximal end of which is inserted into the spring, and the distal end of which is used to connect to the implant.

[0014] Optionally, the proximal end of the spring is fixedly connected to the connecting rod; Alternatively, the distal end of the spring is fixedly connected to the connecting rod.

[0015] Optionally, the spring is a conical spring, the proximal outer diameter D1 of the spring is smaller than the distal outer diameter D2 of the spring, the connecting rod includes a cylindrical section and a frustum section connected to each other, the cylindrical section is located on the proximal side of the frustum section, the proximal end of the spring is sleeved on the cylindrical section, and the distal end of the spring is sleeved on the frustum section.

[0016] The beneficial effects of the present invention: The interventional delivery and release device provided by the present invention delivers the implant to the target position through the delivery tube in the blood vessel. During this process, the inner wall of the delivery tube, the periphery of the release wire and the outer periphery of the spring abut against each other in sequence, the distal end of the spring abuts against the distal end of the positioning hole, and the elastic plate squeezes the spring on the side facing the delivery tube so that the spring is constrained at the positioning hole in the delivery tube.

[0017] The release wire has a large contact area with the outer periphery of the spring, resulting in greater friction and reducing the risk of the release wire slipping out between the inner wall of the delivery pipe and the periphery of the spring. The distal end of the positioning hole protrudes radially from the outer periphery of the spring, forming a height step. This provides a large contact area between the distal end of the spring and the distal end of the positioning hole, improving the stability and reliability of the spring constrained at the positioning hole and reducing the risk of the distal end of the spring slipping out of the positioning hole before the release wire is removed. The spring's elasticity adapts to the pressure of the elastic plate, dispersing the pressure and reducing the risk of localized stress concentration. This allows the elastic plate, release wire, and the distal end wall of the positioning hole to form a stable and uniform clamping force on the spring, further reducing the risk of circumferential displacement and the spring slipping out of the positioning hole before the release wire is removed.

[0018] When the implant is delivered to the target location, the spring will undergo adaptive elastic deformation as the delivery tube bends, which helps to improve the smoothness of delivery. Furthermore, when the elastic plate and the spring interact, the spring will be compressed, which helps to reduce the angle at which the elastic plate tilts outward from the delivery tube, making the circumferential dimension of the distal end of the delivery tube smaller, which also helps to improve the smoothness of delivery.

[0019] After the implant is delivered to the target location, the release wire can be pulled out between the inner wall of the delivery tube and the periphery of the spring at the proximal end of the delivery tube. Under the compression of the elastic plate, the spring moves inward into the delivery tube, and the distal end of the spring disengages from the distal wall of the positioning hole. Furthermore, when the delivery tube is pulled away from the target location, the spring and implant remain at the target location, achieving rapid, stable, and reliable separation of the delivery tube and the implant. Attached Figure Description

[0020] Figure 1 This is a side sectional view of the interventional delivery and release device provided by the present invention; Figure 2This is a side sectional view of the distal structure of one embodiment of the interventional delivery and release device provided by the present invention; Figure 3 This is a side sectional view of the distal structure of another embodiment of the interventional delivery and release device provided by the present invention; Figure 4 This is a cross-sectional view of the intervention delivery and release device provided by the present invention at the positioning hole; Figure 5 This is a schematic diagram of the structure of the cylindrical spring provided by the present invention, which is sleeved on the connecting rod when compressed; Figure 6 This is a schematic diagram of the structure of the cylindrical spring sleeved on the connecting rod provided by the present invention; Figure 7 This is a schematic diagram of the structure of the conical spring sleeved on the connecting rod provided by the present invention; Figure 8 This is a cross-sectional view of the elastic plate provided by the present invention; Figure 9 This is a schematic diagram of the structure of the spring with a ring provided by the present invention; Figure 10 This is a schematic diagram of the structure of the elastic tube provided by the present invention; Figure 11 This is a schematic diagram of the structure of the intervention delivery and release device provided by the present invention, which is equipped with an elastic column.

[0021] In the picture: 100. Conveying pipe; 110. Positioning hole; 120. Elastic plate; 121. Straight plate segment; 122. Arc-shaped plate segment; 123. First straight segment; 124. Second straight segment; 125. Arc-shaped segment; 131. Breaking hole; 132. Handheld marker; 200. Unraveling silk; 310. Spring; 311. Ring; 320. Elastic tube; 321. Pressure relief hole; 330. Elastic column; 400. Connecting rod; 410. Cylindrical section; 420. Frustum section; 430. External section. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figures 1 to 4 As shown, the present invention provides an interventional delivery and release device, which includes a delivery pipe 100 and a release component.

[0027] Specifically, the distal periphery of the delivery tube 100 is provided with a positioning hole 110 and an elastic plate 120; the release assembly includes a release wire 200 and a spring 310 disposed within the delivery tube 100, with the release wire 200 located on the side of the spring 310 away from the positioning hole 110 along the centerline direction of the positioning hole 110. The spring 310 is used to connect the implant.

[0028] In this embodiment, the elastic plate 120 compresses the spring 310 on the side facing inwards from the delivery tube 100. The inner wall of the delivery tube 100, the periphery of the release wire 200, and the outer periphery of the spring 310 abut against each other in sequence, and the distal end of the spring 310 abuts against the distal end wall of the positioning hole 110. The distal end wall of the positioning hole 110 protrudes radially from the outer periphery of the spring 310.

[0029] For example, the implant is delivered to the target location via the delivery tube 100 through the blood vessel. During this process, the inner wall of the delivery tube 100, the periphery of the release wire 200, and the outer periphery of the spring 310 abut against each other in sequence. The distal end of the spring 310 abuts against the distal wall of the positioning hole 110. The elastic plate 120 compresses the spring 310 towards the side inside the delivery tube 100, for example, compressing the part of the spring 310 located inside the positioning hole 110, so that the spring 310 is constrained at the positioning hole 110 inside the delivery tube 100.

[0030] In the intervention delivery release device provided in this embodiment, the periphery of the release wire 200 and the outer periphery of the spring 310 have a large contact area and a large frictional force, which helps to reduce the risk of the release wire 200 being pulled out between the inner wall of the delivery tube 100 and the periphery of the spring 310. The distal end of the positioning hole 110 protrudes radially from the outer periphery of the spring 310, forming a height step. The distal end of the spring 310 and the distal end of the positioning hole 110 have a large contact area, which helps to improve the stability and reliability of the spring 310 being constrained at the positioning hole 110, and reduces the risk of the distal end of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is pulled out. The elasticity of spring 310 can adapt to the pressure of elastic plate 120, disperse the pressure, reduce the risk of local stress concentration in spring 310, and make the elastic plate 120, release wire 200 and the far end hole wall of positioning hole 110 form a stable and uniform clamping force on spring 310. This helps to reduce the risk of circumferential displacement of spring 310 and the risk of spring 310 dislodging from positioning hole 110 before release wire 200 is withdrawn.

[0031] When the implant is delivered to the target location, the spring 310 will undergo adaptive elastic deformation as the delivery tube 100 bends, which helps to improve the smoothness of delivery. Furthermore, when the elastic plate 120 and the spring 310 interact, the spring 310 will be compressed, which helps to reduce the angle at which the elastic plate 120 tilts outward from the delivery tube 100, making the circumferential dimension of the distal end of the delivery tube 100 smaller, which also helps to improve the smoothness of delivery.

[0032] After the implant is delivered to the target location, the release wire 200 can be pulled out between the inner wall of the delivery tube 100 and the periphery of the spring 310 at the proximal end of the delivery tube 100. Under the compression of the elastic plate 120, the spring 310 moves inward into the delivery tube 100, and the distal end of the spring 310 disengages from the distal end wall of the positioning hole 110. Furthermore, when the delivery tube 100 is pulled away from the target location, the spring 310 and the implant remain at the target location, achieving rapid, stable, and reliable separation of the delivery tube 100 from the implant.

[0033] In some embodiments, the spring 310 is configured as a constant pitch spring 310, which is more suitable for adaptive elastic deformation as the conveying pipe 100 bends. This is beneficial for improving the smoothness of the conveying process and for improving the stability and uniformity of the clamping of the spring 310 by the elastic plate 120, the release wire 200 and the distal hole wall of the positioning hole 110. This reduces the risk of circumferential displacement of the spring 310 and the risk of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn.

[0034] In some embodiments, refer to Figure 1 As shown, the proximal periphery of the delivery tube 100 is provided with a break hole 131. The proximal end of the release wire 200 is connected to the proximal end of the delivery tube 100, and the connection position is located on the proximal side of the break hole 131. The proximal end of the delivery tube 100 can be broken at the break hole 131. It can be understood that the proximal end of the delivery tube 100 breaks off at the break hole 131 and separates to form a proximal head (not shown), which is connected to the proximal end of the release wire 200. When the interventional delivery release device needs to be separated from the implant, the proximal end of the delivery tube 100 can be broken off at the break hole 131, and the release wire 200 exposed outside the delivery tube 100 can be pulled, or the proximal head can be pulled directly to allow the release wire 200 to be withdrawn between the inner wall of the delivery tube 100 and the periphery of the spring 310, which facilitates operation.

[0035] In one possible implementation, the proximal periphery of the delivery tube 100 is provided with at least one break hole 131. Exemplarily, the proximal periphery of the delivery tube 100 is provided with a plurality of break holes 131 spaced apart in the circumferential direction; for example, the proximal periphery of the delivery tube 100 is provided with two to six break holes 131 spaced apart in the circumferential direction.

[0036] In one feasible embodiment, the proximal periphery of the delivery tube 100 is provided with two handheld markers 132 arranged along the axial direction of the delivery tube 100, and a breaking hole 131 is located between the two handheld markers 132. The doctor can hold the two handheld markers 132 with both hands to break off the proximal end of the delivery tube 100, facilitating identification and operation. The handheld markers 132 can be formed by laser marking or heat shrink coating with a dark polymer film; the polymer film can be made of PET, PA, or TPU.

[0037] In one feasible implementation, to reduce the risk of the release wire 200 accidentally detaching from the inner wall of the delivery tube 100 and the periphery of the spring 310, the release wire 200 is compressed to have elastic potential energy, causing the release wire 200 to tend to elongate along the axial direction of the delivery tube 100, and when the proximal end of the delivery tube 100 breaks at the break hole 131, the release wire 200 tends to extend outward toward the proximal end of the delivery tube 100. Exemplarily, a portion of the release wire 200 is wavy or spiral to give the release wire 200 elastic potential energy. It is understood that a limiting structure is provided between the delivery tube 100 and the release wire 200 to prevent the release wire 200 from extending from the distal end of the delivery tube 100.

[0038] In some embodiments, refer to Figure 5 As shown, the relationship between the pitch p of spring 310 and the wire diameter d2 of spring 310 is: d2 / 2≤p / 2≤d2. This allows spring 310 to undergo adaptive elastic deformation as the conveying pipe 100 bends, while ensuring the stability and uniformity of the clamping of spring 310 by the elastic plate 120, the release wire 200, and the distal hole wall of the positioning hole 110. This reduces the risk of circumferential displacement of spring 310 and the risk of spring 310 dislodging from positioning hole 110 before release wire 200 is removed.

[0039] In some embodiments, refer to Figure 4 and Figure 6 As shown, the relationship between the inner diameter d1 of the conveying pipe 100, the wall thickness t of the conveying pipe 100, the outer diameter D of the spring 310, and the wire diameter d of the release wire 200 is: d1 + t > D + d > d1. This ensures a larger contact area between the distal end of the spring 310 and the distal wall of the positioning hole 110, which improves the stability and reliability of the spring 310 constrained at the positioning hole 110 and reduces the risk of the distal end of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn. The spring 310 is designed as a cylindrical spring.

[0040] In other embodiments, reference is made to Figure 4 and Figure 7As shown, the proximal outer diameter D1 of spring 310 is smaller than the distal outer diameter D2 of spring 310. The relationship between the inner diameter d1 of conveying pipe 100, the wall thickness t of conveying pipe 100, the proximal outer diameter D1 and distal outer diameter D2 of spring 310, and the wire diameter d of release wire 200 is: d1+t>(D1+D2) / 2+d>d1. This results in a larger contact area between the distal end of spring 310 and the distal hole wall of positioning hole 110, which is beneficial to improving the stability and reliability of spring 310 being constrained at positioning hole 110, and reducing the risk of the distal end of spring 310 dislodging from positioning hole 110 before release wire 200 is withdrawn. Spring 310 can be a conical spring. In this embodiment, spring 310 can be springs of other shapes besides cylindrical springs and conical springs, and this embodiment is not limited to any particular shape.

[0041] For example, the relationship between the proximal outer diameter D1 and the distal outer diameter D2 of the spring 310 is: D1 < D2, which helps to reduce the angle at which the elastic plate 120 tilts outward toward the delivery pipe 100 and allows the distal end of the spring 310 to have a larger contact area with the distal hole wall of the positioning hole 110.

[0042] In some embodiments, refer to Figure 2 and Figure 5 As shown, the length L of the spring 310 along the axial direction of the conveying pipe 100 is greater than the distance S1 between the far end of the elastic plate 120 and the far end of the positioning hole 110. When the release wire 200 is not pulled away between the inner wall of the conveying pipe 100 and the periphery of the spring 310, the abutment between the elastic plate 120 and the spring 310 is stable and reliable.

[0043] In some embodiments, the relationship between the distance S2 between the inner edges of the two hole sidewalls of the positioning hole 110 that are disposed opposite each other in the circumferential direction of the conveying pipe 100, the outer diameter D of the spring 310, and the wire diameter d2 of the spring 310 is: d2(2D-d2)≥(S2) 2 This ensures that a height step is formed between the spring 310 and the distal hole wall of the positioning hole 110. Wherein, d2(2D-d2)≥(S2) 2 By (D / 2) 2 -(S2 / 2) 2 ≤(D / 2-d / 2) 2 The derivation is simplified to obtain the result.

[0044] In some embodiments, during assembly, the release wire 200 can be first inserted into the delivery tube 100, with the distal end of the release wire 200 positioned near the distal end of the positioning hole 110, and the distance between the distal end of the release wire 200 and the distal end of the positioning hole 110 being greater than the length of the spring 310. Then, the spring 310 is inserted from the distal end of the delivery tube 100 until it is positioned near the distal end of the positioning hole 110. At this point, a tool (e.g., tweezers) is used to apply force to the spring 310 to lift the elastic plate 120, thereby allowing the distal end of the release wire 200 to pass through the gap between the spring 310 and the inner wall of the delivery tube 100. Finally, the distal end of the release wire 200 is passed through the gap between the spring 310 and the inner wall of the delivery tube 100. For example, when the distal end of the release wire 200 is located on the proximal side of the distal hole wall of the positioning hole 110, and the distance between the distal end of the release wire 200 and the distal hole wall of the positioning hole 110 is greater than the length of the spring 310, the release wire 200 is compressed and has elastic potential energy, causing the distal end of the release wire 200 to tend to extend toward the distal end of the delivery tube 100. When the release wire 200 is released, the release wire 200 can pass through the gap between the spring 310 and the inner wall of the delivery tube 100 by its own deformation.

[0045] For example, such as Figure 4 As shown, when the distance S2 between the inner edges of the two opposing sidewalls of the positioning hole 110 along the circumference of the conveying pipe 100 is greater than or equal to the outer diameter D of the spring 310, during assembly, the release wire 200 can be first threaded into the conveying pipe 100, and then the spring 310 can be installed into the conveying pipe 100 through the positioning hole 110. This allows the inner wall of the conveying pipe 100, the periphery of the release wire 200, and the outer periphery of the spring 310 to abut against each other in sequence, making it easier to assemble the conveying release device. Here, the outer diameter D of the spring 310 refers to the maximum outer diameter of the spring 310.

[0046] In this embodiment, during assembly, the release wire 200 can be inserted through the distal end of the delivery tube 100.

[0047] In some embodiments, the periphery of the spring 310 abuts against the inner edges of the two sidewalls of the positioning hole 110 that are opposite each other in the circumferential direction of the conveying pipe 100. This helps reduce the risk of circumferential displacement of the spring 310 and the risk of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn. In other embodiments, the periphery of the spring 310 does not contact the inner edges of the two sidewalls of the positioning hole 110 that are opposite each other in the circumferential direction of the conveying pipe 100, which facilitates assembly.

[0048] In some embodiments, refer to Figures 1 to 3 As shown, the proximal end wall of the positioning hole 110 extends to form an elastic plate 120, which facilitates the molding and manufacturing of the elastic plate 120.

[0049] In some embodiments, refer to Figure 2 , Figure 4 and Figure 8 As shown, the part of the elastic plate 120 that contacts the spring 310 is designed as a concave arc surface, which helps to reduce the risk of circumferential displacement of the spring 310 and the risk of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn. This ensures that the forces of the elastic plate 120, the inner wall of the delivery tube 100, the periphery of the release wire 200, and the outer periphery of the spring 310 are in the same plane. When the release wire 200 is withdrawn between the inner wall of the delivery tube 100 and the periphery of the spring 310, the spring 310 can quickly move into the delivery tube 100 under the compression of the elastic plate 120, resulting in a fast response speed and a good surgical experience.

[0050] In one feasible implementation, the relationship between the width B of the elastic plate 120 and the outer diameter D of the spring 310 is: B≥0.5D, which helps to reduce the risk of circumferential displacement of the spring 310 and reduce the risk of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn.

[0051] For example, the relationship between the dimension s of the concave arc surface along the length of the elastic plate 120, the pitch p of the spring 310, and the wire diameter d2 of the spring 310 is: s≥p+d2, so as to ensure the stability and uniformity of the clamping of the spring 310 by the elastic plate 120, the release wire 200, and the distal hole wall of the positioning hole 110.

[0052] In some embodiments, refer to Figure 9 As shown, the spring 310 includes a ring 311 at its distal end, which abuts against the distal wall of the positioning hole 110. When the release wire 200 is pulled away between the inner wall of the delivery tube 100 and the periphery of the spring 310, the ring 311 more easily disengages from the distal wall of the positioning hole 110, reducing the risk of jamming and providing a better surgical experience.

[0053] For example, the distal end of the ring 311 is set as a plane, and the ring 311 has a large contact area with the distal hole wall of the positioning hole 110. This is beneficial to improve the stability and uniformity of the clamping of the spring 310 by the elastic plate 120, the release wire 200 and the distal hole wall of the positioning hole 110, reduce the risk of the spring 310 circumferentially shifting, and reduce the risk of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn.

[0054] For example, the distal end of the ring 311 is set as an arc surface. When the release wire 200 is pulled away between the inner wall of the delivery tube 100 and the periphery of the spring 310, the ring 311 can be released from the distal hole wall of the positioning hole 110 more quickly, resulting in a better surgical operation experience.

[0055] In this embodiment, the ring 311 can also be other shapes, and this embodiment does not limit it.

[0056] For example, the spring 310 can be formed by winding metal wire, cutting metal tubes, etc., and this embodiment does not limit it.

[0057] In some embodiments, refer to Figures 1 to 3 As shown, the elastic plate 120 and the spring 310 protrude from the outer periphery or near the outer edge of the positioning hole 110 and abut against each other. When the release wire 200 is pulled away between the inner wall of the delivery tube 100 and the periphery of the spring 310, the spring 310 can move more quickly into the delivery tube 100 under the compression of the elastic plate 120. The elastic plate 120 and the spring 310 protrude from the proximal outer edge of the positioning hole 110 and abut against each other, so that the elastic plate 120 compresses the spring 310 into the delivery tube 100 and the distal end of the positioning hole 110. When the release wire 200 is pulled away between the inner wall of the delivery tube 100 and the periphery of the spring 310, the distal end of the spring 310 disengages from the distal end wall of the positioning hole 110. Under the constraint of the elastic plate 120, the spring 310 releases energy and can move toward the distal end of the delivery tube 100 and be offset from the positioning hole 110 along the axial direction of the delivery tube 100. When the delivery tube 100 is pulled away from the target position, the spring 310 is more likely to disengage from the delivery tube 100, which helps to improve the separation speed between the delivery tube 100 and the implant, and is stable and reliable.

[0058] For example, when the release wire 200 is not pulled out between the inner wall of the delivery tube 100 and the periphery of the spring 310, the elastic plate 120 can be bent outward from the delivery tube 100.

[0059] In one feasible implementation, the elastic plate 120 is elongated to facilitate molding. For example, as shown... Figure 1 As shown, the side of the elastic plate 120 facing into the delivery tube 100 abuts against the near periphery of the spring 310 exposed in the positioning hole 110.

[0060] In one feasible implementation, the elastic plate 120 includes a straight plate segment 121 and an arc-shaped plate segment 122 connected sequentially from proximal to distal end. For example, as shown... Figure 2 As shown, the arc-shaped plate segment 122 abuts against the near-end outer edge of the spring 310 exposed in the positioning hole 110.

[0061] In another feasible embodiment, the elastic plate 120 includes a first straight segment 123, a second straight segment 124, and an arcuate segment 125 connected sequentially from proximal to distal end. The first straight segment 123 and the second straight segment 124 are arranged at an angle, and the arcuate segment 125 is bent relative to the second straight segment 124 in a direction away from the axis of the delivery tube 100. When the release wire 200 is withdrawn between the inner wall of the delivery tube 100 and the periphery of the spring 310, the arcuate segment 125 can accommodate the spring 310, preventing the elastic plate 120 from interfering with the movement of the spring 310 toward the distal end of the delivery tube 100.

[0062] For example, such as Figure 3 As shown, the second straight segment 124 abuts against the outer periphery of the spring 310 exposed in the positioning hole 110. It can be understood that when the release wire 200 is not withdrawn between the inner wall of the delivery tube 100 and the periphery of the spring 310, the second straight segment 124 is parallel to the axis of the spring 310, and there is a large contact area between them. This is beneficial to improving the stability and uniformity of the clamping of the spring 310 by the elastic plate 120, the release wire 200, and the distal hole wall of the positioning hole 110, reducing the risk of circumferential displacement of the spring 310, and reducing the risk of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn. The first straight segment 123 can abut against the proximal outer edge of the spring 310 exposed in the positioning hole 110, making it easier for the spring 310 to dislodge from the delivery tube 100.

[0063] For example, the second straight segment 124 abuts against the proximal outer edge of the spring 310 exposed in the positioning hole 110.

[0064] In some embodiments, refer to Figures 5 to 7 As shown, the interventional delivery release device also includes a connecting rod 400. The proximal end of the connecting rod 400 is inserted into the spring 310, and the distal end of the connecting rod 400 is used to connect with the implant for easy assembly. When the release wire 200 is not withdrawn between the inner wall of the delivery tube 100 and the periphery of the spring 310, the connecting rod 400 can constrain the spring 310, reducing deformation of the spring 310 other than telescopic deformation, and ensuring the stability and uniformity of the clamping of the spring 310 by the elastic plate 120, the release wire 200, and the distal hole wall of the positioning hole 110.

[0065] For example, in order for the spring 310 to bend with the delivery pipe 100, at least a portion of the spring 310 is clearance-fitted with the connecting rod 400.

[0066] For example, the connecting rod 400 can be made of an elastic material.

[0067] For example, such as Figure 6 As shown, taking the spring 310 as a cylindrical spring as an example, the connecting rod 400 can be cylindrical.

[0068] For example, such as Figure 7 As shown, taking a conical spring 310 as an example, the connecting rod 400 includes a cylindrical section 410 and a frustum section 420 connected to each other. The cylindrical section 410 is located on the proximal side of the frustum section 420. The proximal end of the spring 310 is fitted onto the cylindrical section 410, and the distal end of the spring 310 is fitted onto the frustum section 420, thereby constraining the range of deformation of the spring 310. This helps reduce the risk of the spring 310 dislodging from the positioning hole 110 before the release wire 200 is withdrawn. The proximal outer diameter D1 of the spring 310 is smaller than the distal outer diameter D2 of the spring 310. Exemplarily, the connecting rod 400 also includes an outer section 430 located at the distal end of the frustum section 420. The outer section 430 is used to connect the implant. The diameter of the outer section 430 can be equal to or unequal to the diameter of the cylindrical section 410; this embodiment does not impose a limitation.

[0069] For example, the proximal end of the spring 310 is fixedly connected to the connecting rod 400 to fix the spring 310 to the connecting rod 400, and the distal end of the spring 310 is a free end so that the spring 310 can produce adaptive elastic deformation.

[0070] For example, the distal end of the spring 310 is fixedly connected to the connecting rod 400 to fix the spring 310 to the connecting rod 400, and the proximal end of the spring 310 is a free end so that the spring 310 can generate adaptive elastic deformation. In this embodiment, the distal end of the spring 310 disengages from the distal hole wall of the positioning hole 110. Under the constraint of the elastic plate 120, the spring 310 releases energy. With the elastic plate 120 abutting against the proximal outer edge of the spring 310 exposed in the positioning hole 110, and the distal end of the spring 310 being fixedly connected to the connecting rod 400, it is more conducive to the spring 310 moving towards the distal end of the delivery tube 100 and offsetting the positioning hole 110 along the axial direction of the delivery tube 100, thereby improving the separation speed of the delivery tube 100 and the implant, and ensuring stability and reliability.

[0071] In some embodiments, refer to Figure 10 As shown, the spring 310 can be replaced by an elastic tube 320 with a central hole, and the periphery of the elastic tube 320 is provided with a plurality of pressure-reducing holes 321 communicating with the central hole.

[0072] In some embodiments, refer to Figure 11 As shown, spring 310 can be replaced by elastic post 330. The elastic post 330 can be made of a polymer elastic material. The proximal end face of the elastic post 330 can be a curved surface. The distal end face of the elastic post 330 can be a flat surface.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An interventional delivery and release device, characterized in that, include: The delivery pipe (100) has a positioning hole (110) and an elastic plate (120) on its far periphery. The release assembly includes a release wire (200) and a spring (310) disposed within a delivery tube (100). The release wire (200) is located on the side of the spring (310) away from the positioning hole (110) along the centerline direction of the positioning hole (110). The spring (310) is used to connect the implant. The inner wall of the conveying pipe (100), the periphery of the release wire (200), and the outer periphery of the spring (310) abut against each other in sequence. The distal end of the spring (310) abuts against the distal end wall of the positioning hole (110), and the distal end wall of the positioning hole (110) protrudes from the outer periphery of the spring (310) along the radial direction of the conveying pipe (100). The elastic plate (120) presses the spring (310) towards the side inside the delivery tube (100).

2. The interventional delivery and release device according to claim 1, characterized in that, The elastic plate (120) extends from the proximal end of the positioning hole (110), and the portion of the elastic plate (120) that contacts the spring (310) is a concave arc surface.

3. The interventional delivery and release device according to claim 1, characterized in that, The elastic plate (120) includes a straight plate segment (121) and an arc-shaped plate segment (122) connected sequentially from the proximal end to the distal end. The arc-shaped plate segment (122) abuts against the outer edge of the spring (310) exposed in the positioning hole (110) at the proximal end. Alternatively, the elastic plate (120) includes a first straight segment (123), a second straight segment (124), and an arc segment (125) connected sequentially from the proximal end to the distal end. The first straight segment (123) and the second straight segment (124) are arranged at an angle. The arc segment (125) is bent relative to the second straight segment (124) in a direction away from the axis of the delivery pipe (100). The second straight segment (124) abuts against the spring (310) exposed on the outer periphery or proximal edge of the positioning hole (110). Alternatively, the elastic plate (120) is elongated, with one side of the elastic plate (120) facing the inside of the delivery pipe (100) abutting against the near periphery of the spring (310) exposed in the positioning hole (110).

4. The interventional delivery and release device according to claim 1, characterized in that, The spring (310) includes a ring (311) at the distal end, which abuts against the distal wall of the positioning hole (110).

5. The interventional delivery and release device according to claim 4, characterized in that, The distal end of the ring (311) is set as a plane or an arc surface.

6. The interventional delivery and release device according to claim 1, characterized in that, The length L of the spring (310) along the axial direction of the delivery pipe (100) is greater than the distance S1 between the distal end of the elastic plate (120) and the distal end of the positioning hole (110); And / or, the relationship between the distance S2 between the inner edges of the two hole sidewalls of the positioning hole (110) arranged opposite each other along the circumference of the conveying pipe (100), the outer diameter D of the spring (310), and the wire diameter d2 of the spring (310) is: d2(2D-d2)≥(S2) 2 ; And / or, the relationship between the width B of the elastic plate (120) and the outer diameter D of the spring (310) is: B≥0.5D.

7. The interventional delivery and release device according to claim 1, characterized in that, The relationship between the inner diameter d1 of the conveying pipe (100), the wall thickness t of the conveying pipe (100), the outer diameter D of the spring (310), and the wire diameter d of the release wire (200) is: d1+t>D+d>d1; Alternatively, the proximal outer diameter D1 of the spring (310) is smaller than the distal outer diameter D2 of the spring (310), and the relationship between the inner diameter d1 of the conveying pipe (100), the wall thickness t of the conveying pipe (100), the proximal outer diameter D1 and the distal outer diameter D2 of the spring (310), and the wire diameter d of the release wire (200) is: d1+t>(D1+D2) / 2+d>d1.

8. The interventional delivery and release device according to claim 1, characterized in that, The spring (310) is configured as a constant pitch spring; and / or, the relationship between the pitch p of the spring (310) and the wire diameter d2 of the spring (310) is: d2 / 2≤p / 2≤d2.

9. The intervention delivery and release device according to any one of claims 1-8, characterized in that, The interventional delivery and release device further includes a connecting rod (400), the proximal end of which is inserted into the spring (310), and the distal end of which is used to connect to the implant.

10. The interventional delivery and release device according to claim 9, characterized in that, The proximal end of the spring (310) is fixedly connected to the connecting rod (400); Alternatively, the distal end of the spring (310) is fixedly connected to the connecting rod (400).

11. The interventional delivery and release device according to claim 9, characterized in that, The spring (310) is a conical spring, and the proximal outer diameter D1 of the spring (310) is smaller than the distal outer diameter D2 of the spring (310). The connecting rod (400) includes a cylindrical section (410) and a frustum section (420) connected to each other. The cylindrical section (410) is located on the proximal side of the frustum section (420). The proximal end of the spring (310) is fitted on the cylindrical section (410), and the distal end of the spring (310) is fitted on the frustum section (420).

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