An interventional delivery device

Abstract

The application belongs to the technical field of medical devices, and particularly discloses an interventional delivery device, which comprises a delivery tube and a release wire. A clamping site forming hole is arranged on the distal end peripheral part of the delivery tube, a clamping site part is arranged on the hole wall of the clamping site forming hole and extends inwards and bends, and a clamping site hole is arranged on the clamping site part. The release wire is arranged in the delivery tube and passes through the release ring and the clamping site hole. The interventional delivery device provided by the application will not be separated from the distal end of the delivery tube under the limiting of the clamping site part and the release wire, which is beneficial to the delivery of the implant. After the implant is delivered to the target position, the release wire can be pulled out of the release ring and the clamping site hole at the proximal end of the delivery tube, and when the delivery tube is pulled away from the target position, the release ring is separated from the distal end of the delivery tube and left in the target position, so that the interventional delivery device and the implant are quickly separated, which is stable and reliable.

Description

Technical Field

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

[0002] In minimally invasive treatment of vascular diseases, it is often necessary to use an interventional delivery 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 separated from the interventional delivery device so that it remains in the target position.

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

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

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An interventional delivery device is provided for delivering an implant, the implant being connected to a release ring, the interventional delivery device comprising:

[0007] The conveying pipe has a locking forming hole on its far periphery, and a locking part that bends and extends into the conveying pipe on the wall of the locking forming hole, and a locking hole is provided on the locking part.

[0008] A release wire is disposed inside the delivery pipe and passes through the release ring and the locking hole, and the locking part and the release wire can form a limiting fit to restrict the release ring from leaving the far end of the delivery pipe.

[0009] Optionally, the positioning part is provided on the proximal side wall of the positioning forming hole, and the length direction of the positioning part is set at an acute angle α with the axis of the conveying pipe.

[0010] Optionally, the relationship between the length L1 of the locking part and the inner diameter D1 of the conveying pipe is 0.5≤L1 / D1≤20;

[0011] And / or, the relationship between the length L2 of the locking hole and the diameter D2 of the release wire is 1≤L2 / D2≤50;

[0012] And / or, the relationship between the width B1 of the locking hole and the diameter D2 of the release wire is 1≤B1 / D2≤10.

[0013] Optionally, the distal periphery of the release wire abuts against both ends of the locking hole.

[0014] Optionally, the delivery pipe includes a proximal pipe section, a flexible pipe section, and a distal pipe section arranged sequentially, and the positioning and forming hole is provided on the distal pipe section.

[0015] Optionally, the proximal end of the tube segment is provided with a break hole on its periphery, the proximal end of the release wire is connected to the proximal end of the tube segment and the connection position is located on the side of the break hole away from the flexible tube segment, and the proximal end of the tube segment can be broken at the break hole.

[0016] Optionally, the intervention delivery device further includes a tension tube, at least a portion of which is inserted into the proximal end of the proximal tube segment, and the proximal end of the release wire is inserted into the tension tube.

[0017] Optionally, the proximal tube segment includes a first tube section and a second tube section. The first tube section is provided with the break hole. The distal end of the second tube section is connected to the flexible tube segment. The outer diameter of the first tube section is larger than the outer diameter of the second tube section. The outer surface of the proximal tube segment between the distal end of the first tube section and the proximal end of the second tube section is provided as a chamfered surface or a rounded surface.

[0018] Optionally, the proximal pipe section, the flexible pipe section, and the distal pipe section are integrally formed or designed separately.

[0019] Optionally, the flexible tube segment includes a sodium hypochlorite tube segment, which has a plurality of elongated holes. Each elongated hole includes a rectangular hole portion and circular holes portion located at both ends of the rectangular hole portion. The length direction of the rectangular hole portion extends along the circumference of the sodium hypochlorite tube segment, and the width b of the rectangular hole portion is less than or equal to the diameter d of the circular hole portion.

[0020] Optionally, the flexible pipe segment includes a sodium hydroxide (HbA1c) pipe segment, which is provided with a plurality of first hole groups and a plurality of second hole groups. The plurality of first hole groups and the plurality of second hole groups are alternately arranged along the length direction of the sodium hydroxide pipe segment. The first hole group includes M first elongated holes spaced apart circumferentially along the sodium hydroxide pipe segment, and the second hole group includes N second elongated holes spaced apart circumferentially along the sodium hydroxide pipe segment. The length direction of both the first elongated holes and the second elongated holes extends circumferentially along the sodium hydroxide pipe segment, and M and N are both integers greater than 2. Along the length direction of the sodium hydroxide pipe segment, the distance s between each adjacent first elongated hole and second elongated hole is equal.

[0021] Optionally, the flexible pipe segment includes a sodium hypochlorite pipe segment, which is provided with a plurality of third hole groups at intervals along its length. The third hole group includes P third elongated holes spaced apart circumferentially along the sodium hypochlorite pipe segment, where P is an integer greater than 2. Along the length of the sodium hypochlorite pipe segment, the third elongated holes of one of every two adjacent third hole groups are staggered from the third elongated holes of the other group, and the staggered angles are equal.

[0022] Optionally, the intervention delivery device further includes an outer sleeve fixedly fitted outside the delivery pipe, the outer sleeve at least covering the flexible pipe section.

[0023] Optionally, the flexible pipe segment includes a spiral pipe segment, the distal end of the spiral pipe segment being connected to the proximal end of the distal pipe segment, and the outer sleeve at least covering the spiral pipe segment and the distal pipe segment;

[0024] Alternatively, the flexible tube segment may include a braided tube segment, the distal end of which is connected to the proximal end of the distal tube segment, and the outer sheath at least covers the braided tube segment and the distal tube segment.

[0025] Optionally, a limiting ring is provided in the proximal end of the distal pipe section, a limiting structure is provided on the release wire, the release wire passes through the limiting ring, the limiting structure is located on the proximal side of the limiting ring, and a limiting fit is formed between the limiting ring and the limiting structure to restrict the movement of the limiting structure toward the distal side of the limiting ring.

[0026] Optionally, the length L3 of the distal pipe segment is in the range of 0.5mm≤L3≤5mm;

[0027] And / or, the distance S1 between the distal side wall of the positioning forming hole and the distal end face of the distal pipe section is in the range of 0.03mm≤S1≤1mm.

[0028] Optionally, an observation hole is provided at the far end of the conveying pipe, and the observation hole and the positioning forming hole are set at a 180° angle along the circumference of the conveying pipe.

[0029] Optionally, the minimum distance S2 between the observation hole and the positioning forming hole along the circumferential direction of the conveying pipe is greater than or equal to the wall thickness T of the conveying pipe.

[0030] Optionally, the intervention delivery device further includes a lubricating layer disposed inside the delivery tube and located on the proximal side of the locking portion, wherein the release wire is sequentially passed through the lubricating layer, the release ring, and the locking hole.

[0031] Optionally, the distal periphery of the conveying pipe is provided with a constraint forming hole, the positioning forming hole and the constraint forming hole are spaced apart along the length direction of the conveying pipe, and the constraint forming hole is located on the proximal side of the positioning forming hole. The wall of the constraint forming hole is provided with a constraint portion that bends and extends into the conveying pipe, and the constraint portion is provided with a constraint hole. The release wire is sequentially passed through the constraint hole, the release ring and the positioning hole.

[0032] Optionally, the constraint portion is provided on the proximal side wall of the constraint forming hole, and the length direction of the constraint portion is set at an acute angle β with the axis of the conveying pipe;

[0033] Alternatively, the constraint portion is provided on the distal side wall of the constraint forming hole, and the length direction of the constraint portion is set at an acute angle γ with the axis of the conveying pipe.

[0034] The beneficial effects of this invention are as follows: The interventional delivery device provided by this invention delivers the implant to the target location via a delivery tube inside a blood vessel. During this process, because the release wire passes through the release ring and the locking hole, the release ring is prevented from detaching from the distal end of the delivery tube by the locking part and the release wire, which is beneficial for the delivery of the implant. Furthermore, after the implant is delivered to the target location, the release wire can be withdrawn from the release ring and the locking hole at the proximal end of the delivery tube. When the delivery tube is withdrawn away from the target location, the release ring detaches from the distal end of the delivery tube and remains at the target location, achieving rapid, stable, and reliable separation of the interventional delivery device from the implant. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of the interventional delivery device provided by the present invention at the proximal and distal sections of the delivery pipe.

[0036] Figure 2 This invention provides that... Figure 1 A schematic diagram of one implementation method of the release wire at point A;

[0037] Figure 3 This invention provides that... Figure 1 A schematic diagram of another implementation of the release wire at point A;

[0038] Figure 4 This is a schematic diagram showing a flat layout of one embodiment of the remote pipe segment provided by the present invention;

[0039] Figure 5 This is a partial cross-sectional view of one embodiment of the delivery pipe with a constraint portion provided by the present invention;

[0040] Figure 6 This is a partially enlarged view of one embodiment of the conveying pipe with a restraint portion provided by the present invention;

[0041] Figure 7 This is a partial cross-sectional view of another embodiment of the delivery pipe with a restraint portion provided by the present invention;

[0042] Figure 8 This is a partially enlarged view of another embodiment of the delivery pipe with a constraint portion provided by the present invention;

[0043] Figure 9 This is a schematic diagram showing another embodiment of the distal pipe segment provided by the present invention.

[0044] Figure 10 This is a schematic diagram of one embodiment of the proximal pipe section provided by the present invention;

[0045] Figure 11 This is a proximal cross-sectional view of another embodiment of the proximal pipe segment provided by the present invention;

[0046] Figure 12 This is a partial cross-sectional view of the conveying pipe with a spiral section provided by the present invention;

[0047] Figure 13 This is a partial structural schematic diagram of the flexible pipe segment with elongated holes provided by the present invention;

[0048] Figure 14 This is a schematic diagram of one embodiment of the elongated hole arrangement of the flexible pipe segment provided by the present invention;

[0049] Figure 15 This is a schematic diagram of another embodiment of the elongated hole arrangement of the flexible tube segment provided by the present invention;

[0050] Figure 16 This is a partial cross-sectional view of the conveying pipe with a limiting ring provided by the present invention;

[0051] Figure 17 This is a partial cross-sectional view of the outer sleeve covering the distal pipe section provided by the present invention;

[0052] Figure 18 This is a partial cross-sectional view of the spiral sleeve provided by the present invention covering the distal pipe section.

[0053] In the picture:

[0054] 100. Liberation Ring;

[0055] 200. Delivery tube; 201. Positioning and forming hole; 2011. Notch; 202. Positioning hole; 203. Breaking hole; 204. Observation hole; 205. Constraint forming hole; 206. Constraint hole; 210. Proximal tube section; 2101. Proximal head; 211. First tube section; 212. Second tube section; 213. Chamfered surface; 214. Handheld marker; 215. Stepping mark; 220. Flexible tube section; 221. Hypophthalmic strip tube section; 222. Spiral tube section; 230. Distal tube section; 231. Positioning part; 232. Constraint part; 233. Limiting ring; 240. Developing ring;

[0056] 300. Lubricating layer;

[0057] 400. Release wire; 401. Waveform segment; 410. Limiting structure;

[0058] 500, outer tube;

[0059] 600, elongated hole; 601, rectangular hole; 602, circular hole; 610, first hole group; 611, first elongated hole; 620, second hole group; 621, second elongated hole; 630, third hole group; 631, third elongated hole;

[0060] 700, tension tube;

[0061] 800, spiral pipe sleeve;

[0062] 900, End cap. Detailed Implementation

[0063] 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.

[0064] 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.

[0065] 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.

[0066] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0067] Reference Figures 1 to 3 As shown, the present invention provides an interventional delivery device for delivering implants. The implant is connected to a release ring 100.

[0068] In this embodiment, the intervention delivery device includes a delivery tube 200 and a release wire 400. The distal periphery of the delivery tube 200 is provided with a locking forming hole 201. The wall of the locking forming hole 201 is provided with a locking portion 231 that bends and extends into the delivery tube 200, and the locking portion 231 is provided with a locking hole 202. The release wire 400 is disposed inside the delivery tube 200 and passes through the release ring 100 and the locking hole 202. The locking portion 231 and the release wire 400 can form a limiting fit to prevent the release ring 100 from disengaging from the distal end of the delivery tube 200.

[0069] It is understood that the distal end of the delivery tube 200 refers to the end furthest from the operator during surgery (or, when used on a living organism, the end that first contacts / intervenes in the biological tissue), and the proximal end of the delivery tube 200 refers to the opposite end of the distal end. Furthermore, the definitions of the proximal and distal ends of other components and structural features on components in this embodiment are the same as those for the proximal and distal ends of the delivery tube 200, and will not be elaborated further in this application.

[0070] For example, the implant is delivered to the target location via the delivery tube 200 through the blood vessel. During this process, because the release wire 400 passes through the release ring 100 and the locking hole 202, the release ring 100 will not detach from the distal end of the delivery tube 200 due to the restraint of the locking part 231 and the release wire 400, which is beneficial for the delivery of the implant. After the implant is delivered to the target location, the release wire 400 can be withdrawn from the release ring 100 and the locking hole 202 at the proximal end of the delivery tube 200. When the delivery tube 200 is withdrawn in a direction away from the target location, the release ring 100 detaches from the distal end of the delivery tube 200 and can remain at the target location, realizing rapid, stable and reliable separation of the interventional delivery device and the implant.

[0071] For example, the release ring 100 can be made of polymer materials, such as PP, PET or HDPE; the release ring 100 can also be made of metal materials, such as platinum-tungsten alloy, stainless steel or nickel-titanium alloy.

[0072] For example, the wire diameter of the release ring 100 is 0.025mm to 0.65mm, which is convenient for processing.

[0073] For example, the release wire 400 can be a metal wire or a polymer material with good elasticity and toughness, such as 304 stainless steel round wire.

[0074] In some embodiments, refer to Figures 1 to 3 As shown, the interventional delivery device also includes a lubrication layer 300, which is disposed inside the delivery tube 200 and located near the proximal end of the locking portion 231. A release wire 400 is sequentially threaded through the lubrication layer 300, the release ring 100, and the locking hole 202. In this embodiment, the lubrication layer 300 helps reduce the risk of the release wire 400 becoming stuck in the delivery tube 200 during threading, facilitates the assembly of the interventional delivery device, and reduces the degree of bending of the release wire 400 when the delivery tube 200 bends, thus reducing the risk of the release wire 400 accidentally dislodging from the locking hole 202.

[0075] In one feasible implementation, such as Figure 3 As shown, the release wire 400 includes a waveform segment 401 located within the lubrication layer 300, which helps reduce the shaking of the release wire 400 within the lubrication layer 300. Furthermore, the waveform segment 401 is more suitable for bending. When the delivery tube 200 is bent, the distal end of the release wire 400 will not move significantly towards the proximal or distal end of the delivery tube 200, which helps reduce the risk of the release wire 400 accidentally dislodging from the locking hole 202 and accidentally extending out of the delivery tube 200.

[0076] In another feasible embodiment, the release wire 400 includes a helical section located within the lubrication layer 300, which helps to reduce the swaying of the release wire 400 within the lubrication layer 300. The helical section is also more suitable for bending, so that when the delivery tube 200 is bent, the distal end of the release wire 400 will not move significantly toward the proximal or distal end of the delivery tube 200. This helps to reduce the risk of the release wire 400 accidentally dislodging from the locking hole 202 and accidentally extending out of the delivery tube 200.

[0077] In this embodiment, the release wire 400 can also be as follows: Figure 2 The straight line or other shapes shown are not limited in this embodiment.

[0078] In one possible implementation, the lubricating layer 300 and the delivery pipe 200 may be clearance-fitted. Exemplarily, the material of the lubricating layer 300 may include, but is not limited to, polytetrafluoroethylene (PTFE). In another possible implementation, the lubricating layer 300 covers the inner wall of the delivery pipe 200, and the lubricating layer 300 may be a coating.

[0079] In some embodiments, refer to Figure 1 , Figure 2 and Figure 4 As shown, a locking portion 231 is provided on the proximal side wall of the locking orifice 201, and the length direction of the locking portion 231 is set at an acute angle α with the axis of the delivery tube 200. The locking portion 231, located on the proximal side wall of the locking orifice 201 and bent inwards towards the delivery tube 200, helps reduce the risk of the release ring 100 snagging on the locking portion 231. It is understood that after the release wire 400 disengages from the release ring 100, the risk of the implant being pulled due to snagging between the locking portion 231 and the release ring 100 is reduced when the delivery tube 200 is withdrawn from the blood vessel.

[0080] For example, the acute angle α can be 30°, 35°, 45°, 50° or 60°.

[0081] For example, the locking part 231 may be elongated.

[0082] For example, the relationship between the length L1 of the locking part 231 and the inner diameter D1 of the delivery pipe 200 is 0.5≤L1 / D1≤20, which facilitates processing and helps to reduce the probability that the distal end of the release wire 400 will curl up due to the locking part 231 being too short.

[0083] For example, the distal periphery of the release wire 400 abuts against both ends of the locking hole 202, which helps to reduce the deformation of the release wire 400 at the locking hole 202 and the amplitude of its sway relative to the delivery tube 200, thus reducing the risk of the release wire 400 accidentally dislodging from the locking hole 202. For example, as Figure 5 and Figure 8 As shown, the distal periphery of the release wire 400 abuts against the upper edge of the proximal end of the locking hole 202 and against the lower edge of the distal end of the locking hole 202.

[0084] For example, the locking hole 202 includes, but is not limited to, an elongated hole or a circular hole. For example, the relationship between the length L2 of the locking hole 202 and the diameter D2 of the release wire 400 is 1≤L2 / D2≤50, which is beneficial to ensuring the strength and reliability of the locking part 231, and also beneficial to the distal periphery of the release wire 400 abutting against the upper edge of the proximal end of the locking hole 202 and against the lower edge of the distal end of the locking hole 202.

[0085] For example, the relationship between the width B1 of the locking hole 202 and the diameter D2 of the release wire 400 is 1≤B1 / D2≤10, which is beneficial to ensuring the strength and reliability of the locking part 231, and also beneficial to the distal periphery of the release wire 400 abutting against the upper edge of the proximal end of the locking hole 202 and against the lower edge of the distal end of the locking hole 202.

[0086] For example, in order to ensure the strength and reliability of the locking part 231 and to facilitate the threading of the release wire 400, the distance S3 between the wall of the locking hole 202 and the far edge of the locking part 231 along the length direction of the locking part 231 is 0.02mm≤S3≤0.5mm.

[0087] For example, the distal end of the locking portion 231 may be arc-shaped.

[0088] For example, the wall of the locking hole 202 (e.g., the distal wall of the locking hole 202) intersects the axis of the delivery pipe 200, so that the locking part 231 provides more space inside the release ring 100, which facilitates the release ring 100 being fitted onto the release wire 400 and reduces the risk of the release ring 100 getting caught on the locking part 231, making it easier for the release wire 400 to detach from the delivery pipe 200. In this embodiment, the wall of the locking hole 202 and the axis of the delivery pipe 200 can also have other positional relationships, such as the locking hole 202 and the locking forming hole 201 being located on the same side of the axis of the delivery pipe 200 along the radial direction of the delivery pipe 200, or the axis of the delivery pipe 200 being located between the locking hole 202 and the locking forming hole 201 along the radial direction of the delivery pipe 200.

[0089] In some embodiments, the locking part 231 may be located on the distal side wall of the locking forming hole 201 or on other hole walls; this embodiment is not limited to this. When the locking part 231 is located on the distal side wall of the locking forming hole 201, the angle at which the locking part 231 bends into the conveying pipe 200 is greater than 90°.

[0090] In some embodiments, refer to Figure 1 As shown, an observation hole 204 is provided at the distal periphery of the delivery pipe 200. Along the circumference of the delivery pipe 200, the observation hole 204 and the locking forming hole 201 are arranged at a 180° angle. Through the observation hole 204, it is convenient to observe the assembly between the release wire 400 and the release ring 100, for example, to observe the release wire 400 passing through the constraint hole 206, the release ring 100, and the locking hole 202. Furthermore, the observation hole 204 facilitates the molding and manufacturing of the locking forming hole 201, the locking part 231, and the locking hole 202.

[0091] For example, the minimum distance S2 between the observation hole 204 and the positioning forming hole 201 along the circumferential direction of the delivery pipe 200 is greater than or equal to the wall thickness T of the delivery pipe 200, and the observation hole 204 allows the release wire 400 to pass through, which facilitates assembly and helps to improve the strength and reliability of the far end of the delivery pipe 200.

[0092] In some embodiments, refer to Figures 5 to 8 As shown, the distal periphery of the delivery pipe 200 is provided with a constraint forming hole 205. The locking forming hole 201 and the constraint forming hole 205 are spaced apart along the length of the delivery pipe 200, and the constraint forming hole 205 is located on the proximal side of the locking forming hole 201. The wall of the constraint forming hole 205 is provided with a constraint portion 232 that bends and extends into the delivery pipe 200. The constraint portion 232 is provided with a constraint hole 206. The release wire 400 is sequentially passed through the constraint hole 206, the release ring 100, and the locking hole 202. In this embodiment, the constraint hole 206 can limit the release wire 400 to reduce the deformation of the release wire 400 in the section between the locking hole 202 and the constraint hole 206 and the sway amplitude relative to the delivery pipe 200, which helps to reduce the risk of the release wire 400 accidentally dislodging from the locking hole 202. It is understandable that when the delivery pipe 200 is provided with a lubricating layer 300, the release wire 400 is sequentially inserted through the lubricating layer 300, the constraint hole 206, the release ring 100 and the locking hole 202.

[0093] For example, the shape and size of the constraint forming hole 205 and the positioning forming hole 201 can be the same.

[0094] For example, the shape and size of the constraint part 232 and the locking part 231 can be the same.

[0095] For example, the shape and size of the constraint hole 206 and the locking hole 202 can be the same.

[0096] For example, along the axial direction of the observation hole 204, the projections of the locking part 231 and the restraining part 232 are both located within the observation hole 204.

[0097] In one feasible implementation, such as Figure 5 and Figure 6 As shown, a constraint portion 232 is provided on the proximal side wall of the constraint forming hole 205, and the length direction of the constraint portion 232 is set at an acute angle β with the axis of the delivery pipe 200. The constraint portion 232 is located on the proximal side wall of the constraint forming hole 205 and bent inwards towards the delivery pipe 200, which helps to reduce the risk of the release ring 100 hooking onto the constraint portion 232 during assembly.

[0098] For example, the acute angle β can be 30°, 35°, 45°, 50° or 60°.

[0099] For example, when the constraint part 232 is provided on the proximal side wall of the constraint forming hole 205, the distance S4 between the hole wall of the constraint hole 206 and the distal edge of the constraint part 232 along the length direction of the constraint part 232 is in the range of 0.02mm≤S4≤0.5mm.

[0100] In another feasible implementation, such as Figure 7 and Figure 8 As shown, a constraint portion 232 is provided on the distal side wall of the constraint forming hole 205, and the length direction of the constraint portion 232 is set at an acute angle γ with the axis of the conveying pipe 200. The constraint portion 232 is provided on the distal side wall of the constraint forming hole 205 and bent inward toward the conveying pipe 200 to facilitate the release wire 400 passing through the constraint hole 206.

[0101] For example, the acute angle γ can be 30°, 35°, 45°, 50° or 60°.

[0102] For example, when the constraint part 232 is provided on the distal side wall of the constraint forming hole 205, the distance S5 between the hole wall of the constraint hole 206 and the proximal edge of the constraint part 232 along the length direction of the constraint part 232 is in the range of 0.02mm≤S5≤0.5mm.

[0103] For example, when the restraint portion 232 is provided on the proximal side wall of the restraint forming hole 205 or the distal side wall of the restraint forming hole 205, the distal periphery of the release wire 400 abuts against both ends of the restraint hole 206, which helps to reduce the deformation of the release wire 400 in the section between the locking hole 202 and the restraint hole 206 and the amplitude of swaying relative to the delivery tube 200. For example, as Figure 5 As shown, the distal periphery of the release wire 400 abuts against the upper edge of the proximal end of the constraint hole 206 and against the lower edge of the distal end of the constraint hole 206; as Figure 7 As shown, the distal periphery of the release wire 400 abuts against the lower edge of the proximal end of the constraint hole 206 and against the upper edge of the distal end of the constraint hole 206.

[0104] For example, when the constraint part 232 is provided on the proximal side wall of the constraint forming hole 205 or the distal side wall of the constraint forming hole 205, the distance between the center of the locking hole 202 and the axis of the delivery pipe 200 is equal to the distance between the center of the constraint hole 206 and the axis of the delivery pipe 200, so that the release wire 400 can be sequentially passed through the constraint hole 206, the release ring 100 and the locking hole 202.

[0105] In this embodiment, when the constraint part 232 is provided on the proximal side wall of the constraint forming hole 205 or the distal side wall of the constraint forming hole 205, the length direction of the constraint part 232 can be perpendicular to the length direction of the conveying pipe 200.

[0106] In some implementations, refer to Figure 2 and Figure 9 As shown, the distal end of the delivery tube 200 is provided with a notch 2011 communicating with the locking forming hole 201, which facilitates the release wire 400 passing through the constraint hole 206, the release ring 100, and the locking hole 202. For example, after the distal end of the release wire 400 passes through the locking hole 202, the notch 2011 can make way for the release wire 400, and the distal end of the release wire 400 can bend and bypass the periphery of the locking part 231, which helps to reduce the risk of the release wire 400 dislodging from the locking hole 202.

[0107] For example, the relationship between the length L4 of the notch 2011 and the diameter D2 of the release wire 400 is 1≤L4 / D2≤10, so as to ensure the strength and reliability of the distal end of the delivery tube 200.

[0108] For example, the relationship between the width B2 of the notch 2011, the inner diameter D1 of the conveying pipe 200, and the diameter D2 of the release wire 400 is 1 ≤ B2 / D2, and This facilitates the release wire 400 passing through the notch 2011 and ensures the strength and reliability of the distal end of the delivery tube 200.

[0109] For example, combined Figure 1 , Figure 2 and Figure 9 As shown, the relationship between the depth H of the release ring 100 extending into the delivery pipe 200, the diameter D2 of the release wire 400, and the length L4 of the notch 2011 is as follows: This allows the release wire 400 to pass through the constraint hole 206, the release ring 100, and the locking hole 202. For example, 0.1mm ≤ H ≤ 5mm.

[0110] In some embodiments, refer to Figure 1 , Figure 4 , Figure 10 and Figure 11 As shown, the delivery tube 200 includes a proximal tube segment 210, a flexible tube segment 220, and a distal tube segment 230 arranged sequentially. The positioning and forming holes 201 and constraint forming holes 205 are both located on the distal tube segment 230. The flexible tube segment 220 possesses good toughness and elasticity, which helps reduce the risk of breakage due to bending and facilitates the delivery tube 200's intravascular delivery of the implant to the target location.

[0111] For example, the near-end pipe section 210, the flexible pipe section 220, and the far-end pipe section 230 are integrally formed or designed separately.

[0112] For example, in order to ensure the strength and reliability of the proximal pipe section 210, the distance S1 between the distal side wall of the positioning forming hole 201 and the distal end face of the distal pipe section 230 is 0.03mm≤S1≤1mm.

[0113] For example, such as Figure 4 As shown, the length L3 of the distal tube segment 230 is in the range of 0.5mm≤L3≤5mm. For example, L3=1mm or 3mm. The smaller size is beneficial for the delivery of the delivery tube 200 in the blood vessel and reduces the surgical risk.

[0114] For example, such as Figure 1 As shown, the length L5 of the flexible pipe section 220 is in the range of 100mm≤L5≤1000mm.

[0115] In one feasible implementation, the proximal segment 210 has a severance hole 203 on its periphery. The proximal end of the release wire 400 is connected to the proximal segment 210, and the connection position is located on the side of the severance hole 203 away from the flexible segment 220. The proximal segment 210 can be broken at the severance hole 203. It is understood that the proximal segment 210 breaks and separates at the severance hole 203 to form a proximal head 2101, which is connected to the proximal end of the release wire 400. When the interventional delivery device needs to be separated from the implant, the proximal segment 210 can be broken at the severance hole 203, and the release wire 400 exposed outside the distal end of the proximal head 2101 can be pulled away from the flexible segment 220, or the proximal head 2101 can be pulled directly to drive the release wire 400 out of the release ring 100 and the locking hole 202.

[0116] In one feasible implementation, such as Figure 10 As shown, the proximal pipe section 210 is provided with at least one break hole 203. For example, the proximal pipe section 210 is provided with two to six break holes 203 spaced circumferentially. In another feasible embodiment, such as Figure 11 As shown, the proximal pipe segment 210 is provided with at least one set of break hole groups, each group including multiple break holes 203 spaced apart along the circumference of the proximal pipe segment 210. For example, the proximal pipe segment 210 is provided with two to six break hole groups spaced apart along the circumference. It is understood that... Figure 10 The dimension of the break hole 203 in the circumferential direction along the proximal end section 210 is greater than that of the break hole 203. Figure 11 The dimension of the break hole 203 in the proximal pipe section 210 is circumferential. The break holes 203 can be evenly spaced along the circumference of the proximal pipe section 210.

[0117] In one feasible implementation, such as Figure 11As shown, the intervention delivery device also includes a tension tube 700, at least a portion of which is inserted into the proximal end of the proximal tube segment 210 (e.g., the proximal head 2101), and the proximal end of the release wire 400 is inserted into the tension tube 700. It is understood that the tension tube 700 provides tension to the release wire 400, which is secured to the proximal head 2101 via the tension tube 700, facilitating assembly and reducing the likelihood of unintended bending of the proximal end of the release wire 400, which could hinder the distal insertion of the locking hole 202.

[0118] For example, the proximal end of the release wire 400 may be bonded or crimped together with the proximal end of the tension tube 700.

[0119] For example, the tension tube 700 and the proximal head 2101 can be bonded, welded or crimped together.

[0120] For example, the tension tube 700 can be made of metal, such as stainless steel or nickel-titanium alloy.

[0121] For example, the proximal end cap of the proximal head 2101 is provided with an end cap 900.

[0122] For example, the proximal head 2101 and the release wire 400 can also be riveted together without the tension tube 700. Of course, the proximal head 2101 and the release wire 400 can also be connected by welding or other means, which is not limited in this embodiment.

[0123] In one feasible implementation, such as Figure 10 As shown, the proximal tube segment 210 includes a first tube portion 211 and a second tube portion 212. The first tube portion 211 has a cutting hole 203, and the distal end of the second tube portion 212 is connected to the flexible tube segment 220. The outer diameter of the first tube portion 211 is larger than the outer diameter of the second tube portion 212, facilitating the physician's grip on the first tube portion 211 and delivery of the delivery tube 200 into the blood vessel. The outer surface of the proximal tube segment 210 between the distal end of the first tube portion 211 and the proximal end of the second tube portion 212 is chamfered 213 or rounded, facilitating the insertion of the second tube portion 212 into the blood vessel. It can be understood that the proximal head 2101 is the tube segment of the first tube portion 211 proximal to the cutting hole 203.

[0124] For example, the diameter D3 of the first tube 211 is ≤0.7mm, for example, D3=0.35mm.

[0125] For example, the diameter D4 of the second tube 212 is ≤0.55mm, for example, D4=0.25mm.

[0126] For example, the second tube 212 can be formed by grinding.

[0127] For example, the first tube 211 has two handheld markers 214 along its length, and a breaking hole 203 is located between the two handheld markers 214. The doctor can hold each of the two handheld markers 214 with both hands to break the first tube 211, facilitating identification during operation. The handheld markers 214 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.

[0128] For example, the distance S6 between the far end of the two handheld markers 214 and the end cap 900 is S6≤150mm, for example S6=100mm.

[0129] For example, the distance S7 between the distal end of the two handheld markers 214 and the distal end of the first tube 211 is S7≤1200mm, for example S7=1150mm.

[0130] For example, the first tube portion 211 is provided with a suture mark 215, which is located distal to the rupture hole 203. It is understood that the suture mark 215 is always located outside the blood vessel, which helps reduce the surgical risk caused by excessive insertion of the delivery tube 200 into the blood vessel. The suture mark 215 is located distal to the handheld mark 214. The suture mark 215 can be formed by laser marking or by coating with a dark polymer film.

[0131] In some embodiments, refer to Figure 12 As shown, a developing ring 240 may be provided on the flexible tube section 220 to facilitate the transport and positioning of the transport tube 200.

[0132] In some embodiments, refer to Figures 13 to 15 As shown, the flexible pipe segment 220 includes a hyaluronic acid pipe segment 221. Exemplarily, the delivery pipe 200 is integrally formed and can be a metal pipe with good elasticity and toughness, such as a 304 stainless steel pipe. The structural features such as the hyaluronic acid pipe segment 221, the locking forming hole 201, the locking portion 231, and the locking hole 202 on the locking portion 231 can be formed by grinding and cutting.

[0133] For example, the proximal end of the hyaluronic acid tube segment 221 is connected to the distal end of the second tube segment 212, and the distal end of the hyaluronic acid tube segment 221 is connected to the proximal end of the distal end tube segment 230.

[0134] For example, the wave tube section 221 is provided with a plurality of elongated holes 600. The elongated holes 600 include rectangular hole portions 601 and circular hole portions 602 provided at both ends of the rectangular hole portions 601. The length direction of the rectangular hole portions 601 extends circumferentially along the wave tube section 221, and the width b of the rectangular hole portions 601 is less than or equal to the diameter d of the circular hole portions 602. Understandably, the rectangular holes 601 extend circumferentially along the length of the submersible tube 221, which helps improve the uniformity of bending of the submersible tube 221 in all directions. Furthermore, the circular holes 602 can serve as stress dispersion points for the submersible tube 221 at the elongated holes 600. The rectangular holes 601 and circular holes 602 work together to give the submersible tube 221 good toughness and elasticity. In particular, the width b of the rectangular holes 601 is smaller than the diameter d of the circular holes 602, which further reduces stress concentration in the submersible tube 221, lowering the risk of breakage due to bending and facilitating the delivery tube 200's intravascular delivery of the implant to the target location. Understandably, the multiple elongated holes 600 on the submersible tube 221 essentially transform a metal tube with poor toughness and elasticity into a "flexible chain" composed of many short segments connected together from uncut solid parts. Each elongated hole 600 provides a controllable bending point for the submersible segment 221.

[0135] For example, the length l of the rectangular hole 601 can take values ​​ranging from 1 to 10. .

[0136] For example, the width b of the rectangular hole 601 is in the range of 0.01mm≤b≤0.5mm.

[0137] For example, the diameter d of the circular hole 602 is in the range of 0.01mm≤d≤0.5mm.

[0138] For example, along the length of the coastal waveguide section 221, the spacing S8 between two adjacent elongated holes 600 ranges from 0.01mm to 0.5mm.

[0139] For example, the elongated holes 600 are evenly distributed circumferentially along the wave tube segment 221, which helps the wave tube segment 221 to obtain all-round and uniform flexibility, and can easily adapt to the complex three-dimensional path of blood vessels.

[0140] In some embodiments, refer to Figure 14As shown, the waveguide segment 221 is provided with multiple first hole groups 610 and multiple second hole groups 620. The multiple first hole groups 610 and multiple second hole groups 620 are alternately arranged along the length direction of the waveguide segment 221. The first hole group 610 includes M first elongated holes 611 spaced circumferentially along the waveguide segment 221, and the second hole group 620 includes N second elongated holes 621 spaced circumferentially along the waveguide segment 221. The length direction of both the first elongated holes 611 and the second elongated holes 621 extends circumferentially along the waveguide segment 221, where M and N are both integers greater than 2. Along the length direction of the waveguide segment 221, the distance s between each adjacent first elongated hole 611 and second elongated hole 621 is equal. It can be understood that the elongated hole 600 includes the first elongated hole 611 and the second elongated hole 621. It can also be understood that M and N may be equal or unequal. Understandably, when the submersible segment 221 is laid out flat, the first elongated holes 611 and the second elongated holes 621 are arranged in a matrix. In this embodiment, the arrangement of the first hole group 610 and the second hole group 620 can give the submersible segment 221 good toughness and elasticity, which helps to reduce the risk of the submersible segment 221 breaking due to bending, and facilitates the delivery tube 200 to deliver the implant to the target location through the blood vessel.

[0141] For example, the length of the first elongated hole 611 is equal to the length of the second elongated hole 621, which helps the submersible segment 221 to obtain omnidirectional and uniform flexibility. Here, M and N can be equal.

[0142] For example, the dimensions of the first elongated hole 611 and the second elongated hole 621, except for their length, may be equal or unequal, and this embodiment does not impose any limitation.

[0143] In one feasible implementation, such as Figure 14 As shown, N=M. Along the length of the waveguide segment 221, the adjacent first elongated hole 611 and second elongated hole 621 are misaligned. In other words, the projection of one of the adjacent first elongated hole 611 and second elongated hole 621 along the length of the waveguide segment 221 is not on the other.

[0144] For example, along the length of the waveguide segment 221, the center position of the first elongated hole 611 can be opposite to the interval between the two elongated holes 600, which is beneficial to improving the toughness and elasticity of the waveguide segment 221.

[0145] In another feasible implementation, along the length of the wave tube segment 221, adjacent first elongated holes 611 and second elongated holes 621 are arranged opposite each other. In other words, when the wave tube segment 221 is laid out flat, the elongated holes 600 are arranged in a matrix.

[0146] In other embodiments, reference is made to Figure 15 As shown, the submersible segment 221 is provided with multiple third hole groups 630 at intervals along its length. Each third hole group 630 includes P third elongated holes 631 spaced circumferentially along the submersible segment 221, where P is an integer greater than 2. Along the length of the submersible segment 221, the third elongated holes 631 in each of two adjacent third hole groups 630 are staggered from each other by an equal angle. It is understood that all the third elongated holes 631 are of equal length. It is understood that all third hole groups 630 can be divided into multiple rows of spirally arranged third elongated holes 631. It is understood that the elongated hole 600 includes the third elongated holes 631. In this embodiment, the spirally staggered arrangement of the third elongated holes 631 gives the submersible segment 221 good toughness and elasticity, which is beneficial for improving the accuracy and stability of the delivery tube 200 in delivering the implant to the target location via intravascular transvascular access.

[0147] Understandably, if identical pattern units are simply arranged in a straight line, a potential "weak line" will form on the pipe wall, making the pipe prone to bending or twisting along this line. In this embodiment, the elongated hole 600 is equivalent to uniformly distributing flexibility and strength elements along the circumferential and length directions of the hyaluronic acid pipe segment 221. Force transmission tends to occur along continuous areas of the solid structure. This allows the force line to form a certain angle with the length direction of the hyaluronic acid pipe segment 221 when it bends, establishing a more stable and efficient force flow path for the transmission of axial pushing force and torsional force. Specifically, the first elongated hole 611 and the second elongated hole 621 form a Z-shaped force flow path for the hyaluronic acid pipe segment 221, and the third elongated hole 631 forms a spiral force flow path for the hyaluronic acid pipe segment 221. This approach can more effectively decompose and withstand loads from different directions, preventing stress from concentrating on a single line and distributing it over a larger area. This results in all-around, uniform flexibility without any blind spots, greatly improving resistance to compression and torsion. It also helps reduce the risk of the hypotube segment 221 breaking due to bending and improves the accuracy and stability of the delivery tube 200 in delivering the implant to the target location via intravascular delivery.

[0148] For example, in each pair of adjacent third hole groups 630, one end of the third elongated hole 631 of one is projected within the interval between two adjacent third elongated holes 631 of the other, and the other end is projected onto one of the third elongated holes 631 of the other, which is beneficial to improving the toughness and elasticity of the hyaluronic acid tube segment 221.

[0149] In other embodiments, such as Figure 12 and Figure 16As shown, the flexible pipe segment 220 includes a helical pipe segment 222, the distal end of which is connected to the proximal end of the distal pipe segment 230; or, the flexible pipe segment 220 includes a braided pipe segment (not shown), the distal end of which is connected to the proximal end of the distal pipe segment 230.

[0150] For example, the spiral tube segment 222 can be formed by winding a wire around a spring or by cutting a tube.

[0151] For example, the braided tubing segment is a tubing segment formed by braiding metal wires.

[0152] For example, the wire diameter D5 of the spiral tube section 222 is in the range of 0.01mm≤D5≤0.3mm.

[0153] For example, the pitch S9 of the spiral pipe section 222 is in the range of 0.01mm≤S9≤0.3mm.

[0154] In this embodiment, the flexible tube segment 220 can also be other structural shapes, and this embodiment does not limit it.

[0155] In some embodiments, refer to Figure 16 As shown, a limiting ring 233 is provided in the proximal end of the distal tube segment 230, and a limiting structure 410 is provided on the release wire 400. The release wire 400 passes through the limiting ring 233, and the limiting structure 410 is located on the proximal side of the limiting ring 233. A limiting fit is formed between the limiting ring 233 and the limiting structure 410 to restrict the movement of the limiting structure 410 toward the distal side of the limiting ring 233, so as to realize the distal positioning of the release wire 400, which helps to reduce the surgical risk caused by the release wire 400 passing through the distal end of the distal tube segment 230.

[0156] For example, the release wire 400 and the limiting structure 410 can be integrally formed, and the limiting structure 410 can be formed into a sheet-like structure by flattening the release wire 400; or, the release wire 400 and the limiting structure 410 can be designed separately and connected together by welding, binding or other methods.

[0157] For example, the shape of the limiting structure 410 includes, but is not limited to, a polyhedron, a cylinder, or a sphere.

[0158] For example, the diameter of the outer circle of the largest cross section of the limiting structure 410 perpendicular to the length direction of the release wire 400 is 1.2 to 1.5 times, for example 1.3 times, the inner diameter of the limiting ring 233.

[0159] For example, taking the flexible pipe segment 220 including the spiral pipe segment 222 as an example, the proximal end of the limiting ring 233 protrudes from the proximal end of the distal pipe segment 230 and is inserted into the spiral pipe segment 222, which helps to improve the reliability of the spiral pipe segment 222 and the distal pipe segment 230.

[0160] For example, the limiting ring 233 and the distal pipe section 230 can be integrally formed or designed separately.

[0161] In some embodiments, refer to Figure 1 , Figure 16 and Figure 17 As shown, the interventional delivery device also includes an outer sheath 500 fixedly sleeved outside the delivery tube 200, the outer sheath 500 at least covering the flexible tube segment 220. Compared with the flexible tube segment 220, the outer sheath 500 is more smoothly delivered into or withdrawn from the blood vessel, preventing the flexible tube segment 220 from scraping against the blood vessel wall and causing surgical risks.

[0162] For example, the material of the outer tube 500 includes, but is not limited to, polytetrafluoroethylene (PTFE) or thermoplastic polyurethane elastomer (TPU). The outer tube 500 may be coated with a hydrophilic coating.

[0163] For example, the outer sleeve 500 can be thermoplastically wrapped around the delivery pipe 200.

[0164] For example, the outer sleeve 500 may cover the second tube portion 212 of the proximal tube segment 210. The outer sleeve 500 may cover a portion of the outer surface between the first tube portion 211 and the second tube portion 212 (e.g., the chamfered surface 213 or the arcuate surface between the first tube portion 211 and the second tube portion 212).

[0165] Exemplarily, the outer sheath 500 may cover at least a portion of the distal segment 230. For example, the outer sheath 500 extends to the distal end of the distal segment 230. It is understood that the outer sheath 500 is made of a transparent material to facilitate observation of the assembly between the release wire 400 and the release ring 100 through the observation port 204. Taking the flexible segment 220 as an example, including a thiocyanate segment 221, a spiral segment 222, or a braided segment, the outer sheath 500 may cover the distal segment 230 in all cases. It is understood that by covering the spiral segment 222 and the distal segment 230, the outer sheath 500 can enhance the connection stability between the spiral segment 222 and the distal segment 230, helping to reduce curvature changes at the connection point and facilitating the delivery of the delivery tube 200 within the blood vessel. Understandably, the outer sheath 500 covers the braided tube segment and the distal tube segment 230. The outer sheath 500 can enhance the connection stability between the braided tube segment and the distal tube segment 230, which helps to reduce the curvature change at the connection between the braided tube segment and the distal tube segment 230, and facilitates the delivery of the delivery tube 200 in the blood vessel.

[0166] In one feasible implementation, taking the distal end of the delivery tube 200 having a notch 2011 communicating with the positioning and forming hole 201 as an example, the outer tube 500 covers the notch 2011. The distal end of the release wire 400 can be located within the notch 2011. By blocking the distal end of the release wire 400 through the outer tube 500, the surgical risk caused by the distal end of the release wire 400 passing through the notch 2011 and exiting the distal tube segment 230 is reduced.

[0167] In another feasible embodiment, taking the distal end of the delivery pipe 200 having a notch 2011 communicating with the locking and forming hole 201 as an example, such as Figure 18 As shown, the interventional delivery device also includes a spiral sleeve 800 fixedly sleeved outside the delivery tube 200, the spiral sleeve 800 covering the notch 2011. Exemplarily, the distal end of the release wire 400 can be located within the notch 2011, with the outer sleeve 500 shielding the distal end of the release wire 400, which helps reduce the surgical risk caused by the distal end of the release wire 400 passing through the notch 2011 and exiting the delivery tube 200 (e.g., distal tube segment 230); or, the distal end of the release wire 400 can pass through the notch 2011 and exit the delivery tube 200 (e.g., distal tube segment 230) and be clamped between the spiral sleeve 800 and the delivery tube 200 (e.g., distal tube segment 230), which helps reduce the occurrence of the release wire 400 detaching from the release ring 100 and the locking hole 202. It is understood that the spiral sleeve 800 at least partially covers the distal end of the release wire 400.

[0168] For example, such as Figure 18 As shown, the spiral sleeve 800 is fitted onto the distal pipe section 230, and the spiral sleeve 800 can cover the locking forming hole 201 and the constraint forming hole 205. The spiral sleeve 800 does not cover the proximal pipe section 210 and the flexible pipe section 220.

[0169] 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 device for delivering implants, characterized in that, The implant is connected to a release ring (100), and the interventional delivery device includes: The delivery pipe (200) has a positioning forming hole (201) on its far periphery. The positioning forming hole (201) has a positioning part (231) that bends and extends into the delivery pipe (200) on its wall. The positioning part (231) has a positioning hole (202). The far periphery of the delivery pipe (200) also has a constraint part (232) that bends and extends into the delivery pipe (200). The constraint part (232) has a constraint hole (206). A release wire (400) is disposed inside the delivery pipe (200) and passes through the constraint hole (206), the release ring (100) and the locking hole (202) in sequence. The locking part (231) and the release wire (400) can form a limiting fit to restrict the release ring (100) from leaving the far end of the delivery pipe (200).

2. The interventional delivery device according to claim 1, characterized in that, The positioning part (231) is provided on the proximal side wall of the positioning forming hole (201), and the length direction of the positioning part (231) is set at an acute angle α with the axis of the conveying pipe (200).

3. The interventional delivery device according to claim 2, characterized in that, The relationship between the length L1 of the locking part (231) and the inner diameter D1 of the conveying pipe (200) is 0.5≤L1 / D1≤20; And / or, the relationship between the length L2 of the locking hole (202) and the diameter D2 of the release wire (400) is 1≤L2 / D2≤50; And / or, the relationship between the width B1 of the locking hole (202) and the diameter D2 of the release wire (400) is 1≤B1 / D2≤10.

4. The interventional delivery device according to claim 1, characterized in that, The distal periphery of the release wire (400) abuts against both ends of the locking hole (202).

5. The interventional delivery device according to claim 1, characterized in that, The delivery pipe (200) includes a proximal pipe section (210), a flexible pipe section (220) and a distal pipe section (230) arranged in sequence, and the positioning forming hole (201) is provided on the distal pipe section (230).

6. The interventional delivery device according to claim 5, characterized in that, The proximal tube segment (210) has a break hole (203) around its periphery. The proximal end of the release wire (400) is connected to the proximal tube segment (210) and the connection position is located on the side of the break hole (203) away from the flexible tube segment (220). The proximal tube segment (210) can be broken at the break hole (203).

7. The interventional delivery device according to claim 6, characterized in that, The intervention delivery device further includes a tension tube (700), at least a portion of which is inserted into the proximal end of the proximal tube segment (210), and the proximal end of the release wire (400) is inserted into the tension tube (700).

8. The interventional delivery device according to claim 6, characterized in that, The proximal tube segment (210) includes a first tube section (211) and a second tube section (212). The first tube section (211) is provided with the break hole (203). The distal end of the second tube section (212) is connected to the flexible tube segment (220). The outer diameter of the first tube section (211) is larger than the outer diameter of the second tube section (212). The outer surface of the proximal tube segment (210) between the distal end of the first tube section (211) and the proximal end of the second tube section (212) is provided as a chamfered surface (213) or a circular arc surface.

9. The interventional delivery device according to claim 5, characterized in that, The proximal pipe section (210), the flexible pipe section (220), and the distal pipe section (230) are integrally formed or designed separately.

10. The interventional delivery device according to claim 5, characterized in that, The flexible tube segment (220) includes a sodium hypochlorite tube segment (221), which has a plurality of elongated holes (600). Each elongated hole (600) includes a rectangular hole portion (601) and a circular hole portion (602) located at both ends of the rectangular hole portion (601). The length direction of the rectangular hole portion (601) extends along the circumference of the sodium hypochlorite tube segment (221), and the width b of the rectangular hole portion (601) is less than or equal to the diameter d of the circular hole portion (602).

11. The interventional delivery device according to claim 5, characterized in that, The flexible pipe segment (220) includes a wave tube segment (221), on which a plurality of first hole groups (610) and a plurality of second hole groups (620) are provided. The plurality of first hole groups (610) and the plurality of second hole groups (620) are alternately arranged along the length direction of the wave tube segment (221). The first hole group (610) includes M first elongated holes (611) spaced apart circumferentially along the wave tube segment (221). The two-hole group (620) includes N second elongated holes (621) spaced circumferentially along the wave tube segment (221). The length directions of the first elongated hole (611) and the second elongated hole (621) are both extended circumferentially along the wave tube segment (221), and M and N are both integers greater than 2. Along the length direction of the wave tube segment (221), the distance s between each adjacent first elongated hole (611) and second elongated hole (621) is equal.

12. The interventional delivery device according to claim 5, characterized in that, The flexible pipe segment (220) includes a wave tube segment (221), which has a plurality of third hole groups (630) spaced apart along its length. Each third hole group (630) includes P third elongated holes (631) spaced apart circumferentially along the wave tube segment (221), where P is an integer greater than 2. Along the length of the wave tube segment (221), the third elongated holes (631) of one of the two adjacent third hole groups (630) are staggered from the third elongated holes (631) of the other, and the staggered angles are equal.

13. The interventional delivery device according to claim 5, characterized in that, The intervention delivery device also includes an outer sleeve (500) fixedly sleeved outside the delivery pipe (200), the outer sleeve (500) at least covering the flexible pipe section (220).

14. The interventional delivery device according to claim 13, characterized in that, The flexible tube segment (220) includes a spiral tube segment (222), the distal end of which is connected to the proximal end of the distal tube segment (230), and the outer tube (500) covers at least the spiral tube segment (222) and the distal tube segment (230). Alternatively, the flexible tube segment (220) may include a braided tube segment, the distal end of which is connected to the proximal end of the distal tube segment (230), and the outer sleeve (500) may at least cover the braided tube segment and the distal tube segment (230).

15. The interventional delivery device according to claim 5, characterized in that, A limiting ring (233) is provided in the proximal end of the distal pipe section (230), and a limiting structure (410) is provided on the release wire (400). The release wire (400) passes through the limiting ring (233), and the limiting structure (410) is located on the proximal side of the limiting ring (233). A limiting fit is formed between the limiting ring (233) and the limiting structure (410) to restrict the movement of the limiting structure (410) toward the distal side of the limiting ring (233).

16. The interventional delivery device according to claim 5, characterized in that, The length L3 of the distal pipe section (230) is in the range of 0.5mm≤L3≤5mm; And / or, the distance S1 between the distal side wall of the positioning forming hole (201) and the distal end face of the distal pipe section (230) is in the range of 0.03mm≤S1≤1mm.

17. The interventional delivery device according to claim 1, characterized in that, The far end of the conveying pipe (200) is provided with an observation hole (204). Along the circumference of the conveying pipe (200), the observation hole (204) and the positioning forming hole (201) are set at an angle of 180°.

18. The interventional delivery device according to claim 17, characterized in that, The minimum distance S2 between the observation hole (204) and the positioning forming hole (201) along the circumferential direction of the delivery pipe (200) is greater than or equal to the wall thickness T of the delivery pipe (200).

19. The interventional delivery device according to claim 1, characterized in that, The intervention delivery device also includes a lubricating layer (300), which is disposed inside the delivery tube (200) and located on the proximal side of the locking part (231). The release wire (400) is sequentially inserted through the lubricating layer (300), the release ring (100), and the locking hole (202).

20. The interventional delivery device according to any one of claims 1-19, characterized in that, The far end of the delivery pipe (200) is provided with a constraint forming hole (205). The positioning forming hole (201) and the constraint forming hole (205) are spaced apart along the length of the delivery pipe (200), and the constraint forming hole (205) is located on the proximal side of the positioning forming hole (201). The wall of the constraint forming hole (205) is provided with a constraint part (232) that bends and extends into the delivery pipe (200).

21. The interventional delivery device according to claim 20, characterized in that, The constraint part (232) is provided on the proximal side wall of the constraint forming hole (205), and the length direction of the constraint part (232) is set at an acute angle β with the axis of the conveying pipe (200); Alternatively, the constraint part (232) is provided on the distal side wall of the constraint forming hole (205), and the length direction of the constraint part (232) is set at an acute angle γ with the axis of the conveying pipe (200).

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