CN111374812A - Tracheal stent delivery and tracheal stent system - Google Patents

Abstract

The invention provides a tracheal stent conveyor and a tracheal stent system. The tracheal stent conveyor comprises a binding unit and a supporting unit. The binding unit comprises a binding wire tube and a binding wire, the binding wire is arranged in the binding wire tube in a penetrating mode, the far end of the binding wire is fixed relative to the far end of the binding wire tube, a plurality of side holes are formed in the far end of the binding wire tube, and the binding wire extends out of the side holes to form a binding wire ring in a first state; the supporting unit comprises a supporting rod which is arranged outside the binding pipe and moves along the axial direction of the binding pipe; in the first state, the wire binding ring is wound on the tracheal stent, and the closed end of the wire binding ring is arranged on the support rod in a penetrating manner and used for binding the tracheal stent on the wire binding pipe and the support rod; in a second state, the support rod is staggered with the far end of the binding tube and is close to the near end of the binding tube, and the support rod is pulled away from the closed end of the binding ring and is used for unbinding the tracheal stent; the tracheal stent conveyor and the system are convenient to release and accurate in positioning.

Description

Tracheal stent delivery and tracheal stent system

technical field

The invention relates to the technical field of medical devices, in particular to a tracheal stent conveyor and a tracheal stent system.

Background technique

The current tracheal stent has a wide range of applications and can be used to treat various organic stenosis of the human trachea, main bronchus, and upper, middle and lower lobe bronchi.

In the prior art, the tracheal stent is usually loaded into the metal insertion tube of the conveyor by extrusion, and the stent-loaded conveyor is sent into the trachea or bronchus of the diseased segment through a rigid bronchoscope, and then the tracheal stent is pushed by a push rod. Pushing out and implanting into the trachea or bronchus of the diseased segment to complete the release of the stent is not only inconvenient to operate, but also the positioning position after the release is not easy to precisely control, usually there is a certain deviation from the desired predetermined position, and it is necessary to use optical biopsy forceps to repeatedly adjust the position of the tracheal stent. location, resulting in prolonged operation time and increased surgical risk.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a tracheal stent delivery device and a tracheal stent system with convenient release and accurate positioning.

In order to solve the above technical problems, the present invention provides a tracheal stent delivery device, which includes a binding unit and a supporting unit. The binding unit includes a wire binding tube and a wire binding tube. The wire binding tube is inserted into the wire binding tube and the distal end of the wire binding tube is fixed relative to the distal end of the wire binding tube. The distal end is provided with a plurality of side holes. In a first state, the wire tie extends from the side hole to form a wire tie ring. The part of the wire tie ring close to the side hole is open and away from the side. A part of the hole is closed so as to be a closed end; the support unit includes a support rod disposed outside the wire binding tube and moving along the axial direction of the wire binding tube; in the first state, the wire binding ring is wound around the on the tracheal stent, and the closed end of the wire binding ring is worn on the support rod, for binding the tracheal stent on the wire binding tube and the support rod; in a second state, the The distal end of the support rod is staggered from the distal end of the wire binding tube and is close to the proximal end of the wire binding tube, and the support rod is pulled away from the closed end of the wire binding ring for unbinding the Tracheal stent.

The present invention also provides a tracheal stent system, comprising a tracheal stent and the aforementioned tracheal stent delivery device, wherein the tracheal stent is made of elastic material, and in the first state, the tracheal stent is folded and passed through the tracheal stent. The wire binding ring is bound on the wire binding tube and the support rod; in the second state, the distal end of the support rod is staggered from the distal end of the wire binding tube and is close to the wire binding At the proximal end of the tube, the support rod is withdrawn from the closed end of the wire binding loop to untie the tracheal stent.

In the tracheal stent conveyor and stent system provided by the present invention, the tracheal stent is wound through a wire binding loop and the closed end of the wire binding loop is passed on the support rod, so that the tracheal stent is bound to the wire binding tube and the support rod. , by moving the support rod toward the proximal end and pulling away from the closed end of the wire binding ring, so that the tracheal stent is unbound and released, allowing the doctor to use the tracheal stent delivery device to directly deliver the tracheal stent to the The location of the lesion is released, the positioning is accurate, no push rod is required, and the tracheal stent is not easily displaced after the release, and the tracheal stent can be unfolded after the support rod is pulled away to release the binding wire, and the release is convenient, so that the release time of the tracheal stent is short, which can effectively significantly reduce the risk of suffocation for the patient.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a tracheal stent system provided by an embodiment of the present invention, wherein the tracheal stent is bound to a tracheal stent transporter.

FIG. 2 is a schematic diagram of an insertion cap of a tracheal stent delivery device provided by an embodiment of the present invention.

3 is a schematic diagram of a tracheal stent delivery device provided by an embodiment of the present invention, wherein a binding wire extends from a side hole to form a binding wire loop.

FIG. 4 is a schematic diagram after a wire binding loop is formed according to an embodiment of the present invention.

FIG. 5 is a partial schematic diagram of a support unit of a tracheal stent delivery device provided by an embodiment of the present invention.

6 is a schematic cross-sectional view of the matching of the wire binding tube and the support rod seat of the tracheal stent transporter provided by the embodiment of the present invention.

FIG. 7 is a partial schematic diagram of the tying wire being folded after the tracheal stent is released by the tracheal stent transporter provided in the embodiment of the present invention.

8 is a partial schematic diagram of a tracheal stent delivery system provided by an embodiment of the present invention, wherein the tracheal stent is bound to a wire binding tube and a support rod through a wire binding ring.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to describe the structure of the tracheal stent delivery device and the tracheal stent system of the present invention more clearly, the terms "proximal end" and "distal end" are defined herein as conventional terms in interventional medicine. Specifically, the "distal end" refers to the end away from the operator during the surgical operation, and the "proximal end" refers to the end close to the operator during the surgical operation.

Please refer to FIG. 1 to FIG. 8 together. The present invention provides a tracheal stent system 100 . The tracheal stent system 100 includes a tracheal stent 1 and a tracheal stent conveyor 2 .

The tracheal stent 1 is made of elastic material, which can be folded when bound and can automatically return to its original state when unbound. In this embodiment, the tracheal support 1 is cylindrical in a natural state (ie, a state that is not bound), and as shown in FIGS. 1 and 8 , the tracheal support 1 is provided with several Protrusion 11, the protrusion 11 is used to increase the friction between the tracheal stent 1 and the diseased trachea after the release, thereby preventing the tracheal stent 1 from being displaced after the release, preferably the protrusion 11 is hemispherical or Cylindrical; the tracheal stent 1 can be folded when matched with the tracheal stent conveyor 2 . In other embodiments, the shape of the tracheal stent 1 may not be limited to this. In this embodiment, the tracheal stent 1 is a silicone stent, but in other embodiments, it is not limited to this.

The tracheal stent delivery device 2 includes a binding unit 20 , a supporting unit 40 and a locking wire unit 60 . The binding unit 20 is used to bind the tracheal stent 1 to the distal end of the support unit 40; the support unit 40 is used to move axially along the binding unit 20 to release the tracheal stent. 1; the locking wire unit 60 is provided at the proximal end of the tracheal stent conveyor 2, and is used to tighten and fix the binding wire in the binding unit 20.

As shown in FIG. 1 to FIG. 4 , the binding unit 20 includes a wire binding tube 22 and a binding wire 24 , the binding wire 24 is inserted into the wire binding tube 22 and the distal ends of the binding wires 24 are opposite to each other. The distal end of the wire binding tube 22 is fixed, and the distal end of the wire binding tube 22 is provided with a plurality of side holes 224. In a first state, the binding wire 24 protrudes from the side holes 224 to form a binding wire In the ring 225 , the portion of the wire binding ring 225 close to the side hole 224 is open, and the portion away from the side hole 224 is closed to form a closed end.

1 , 3 , 5 and 6 , the support unit 40 includes a support rod 41 disposed outside the wire binding tube 22 and movable along the axial direction of the wire binding tube 22 ; in the first state Next, the wire binding ring 225 is wound on the tracheal stent 1, and the closed end of the wire binding ring 225 is passed through the support rod 41, for binding the tracheal stent 1 to the binding wire tube 22 and support rod 41; in a second state, the support rod 41 moves proximally until the distal end of the support rod 41 and the distal end of the wire binding tube 22 are staggered and close to the wire binding tube 22 , the support rod 41 is pulled away from the closed end of the wire binding ring 225 for unbinding the tracheal stent 1 .

The locking wire unit 60 is connected to the proximal end of the binding unit 20, the proximal end of the binding wire 24 is fixed on the locking wire unit 60, and the locking wire unit 60 is used for binding the trachea. Tighten the wire binding loop 225 when the bracket is 1 .

Further, in this embodiment, the binding unit 20 further includes an insertion cap 21 and a wire binding socket 23 .

As shown in FIG. 2 , the insertion cap 21 is located at the most distal end of the tracheal stent carrier 2 , and the distal end of the insertion cap 21 is a tip 211 , which is generally tapered or similar to a tapered shape as a whole. , so that the insertion cap 21 can be easily inserted into the trachea. The proximal end of the insertion cap 21 is axially provided with a central positioning hole 213, a side positioning hole 214 and a wire fixing hole (not shown), and the distal end of the wire binding tube 22 is fixed to the central positioning hole In 213 , the distal end of the binding wire 24 is fixed in the fixing wire hole, and the distal end of the support rod 41 is movably accommodated in the side positioning hole 214 . In this embodiment, the center positioning hole 213 , the side positioning hole 214 and the fixing wire hole are all round holes.

In other embodiments, the fixing wire hole may not be provided, and the distal end of the binding wire 24 may be fixed by other common methods.

In this embodiment, the implant cap 21 includes a conical section 215 , a columnar section 216 and an extension section 217 connected in sequence from far to near; the tip 211 is located at the distal end of the conical section 215 , so The extension section 217 is disposed along the axial direction of the cylindrical section 216 and extends from the center of the proximal end of the cylindrical section 216; wherein, in the direction perpendicular to the axial direction of the insertion cap 21, the The cross-sectional dimension of the extension section 217 is smaller than the cross-sectional dimension of the columnar section 216, so that a connecting surface 218 is formed at the connection between the columnar section 216 and the tapered section 215, and the side positioning hole 214 is formed in the connection The surface 218 extends axially along the cylindrical section 216, the central positioning hole 213 is formed at the proximal end of the extension section 217 and is located at the axial center of the extension section 217, and the positioning hole is provided in the The bottom of the center positioning hole 213 . In this embodiment, in a direction perpendicular to the axial direction of the insertion cap 21 , the cross-sectional size of the extension section 217 is adapted to the cross-sectional size of the distal end of the wire binding tube 22 . The meaning of the columnar section 216 is that the side positioning hole 214 may be provided in a larger position, and in other embodiments, the columnar section 216 may not be provided. The meaning of the extension section 217 is to increase the connection strength between the distal end of the wire binding tube 22 and the insertion cap 21 .

In order to avoid puncturing the trachea or bronchi during the delivery process, in this embodiment, the insertion cap 21 is made of a flexible material, such as block polyetheramide (PEBAX), silica gel, and the like.

As shown in FIG. 1 , FIG. 3 and FIG. 7 , the wire binding tube 22 has a hollow tubular shape, so that a through hole (not shown) is provided along the axial direction thereof, and the through hole is used for receiving the binding wire 24 . The distal end of the wire binding tube 22 extends into the central positioning hole 213 and is fixed in the central positioning hole 213 , and the proximal end of the wire binding tube 22 is fixed on the wire binding tube seat 23 .

As shown in FIG. 3 , in a direction perpendicular to the axial direction of the wire binding tube 22 and at a position close to the distal end, the wire binding tube 22 is provided with a plurality of side holes 224 , and the plurality of side holes 224 are connected to the The through holes communicate with each other, so that the binding wires 24 accommodated in the through holes can extend from the side holes 224 . Wherein, the distal end of the wire binding tube 22 may be fixed in the central positioning hole 213 through medical glue bonding or ultrasonic welding. In this embodiment, the plurality of side holes 224 have the same spacing and are evenly distributed along the axial direction of the wire binding tube 22 . A plurality of the side holes 224 can be distributed along one row or two rows. In this embodiment, a plurality of the side holes 224 are distributed along two rows, and the two rows of the side holes 224 are arranged opposite to each other with respect to the wire binding tube 22 . axisymmetric. Please also refer to FIG. 4 , a row of the side holes 224 corresponds to a wire tie 24 extending out to form a corresponding wire tie ring 225 . In each row of the side holes 224, the distance between two adjacent side holes 224 is preferably 2 mm to 4 mm; the axial distance L1 between the first and last two side holes 224 in each row The length of the tracheal stent 1 is equal to or slightly greater than the length of the tracheal stent 1, and preferably, L1 is greater than or equal to 100 mm. Of course, it may not be limited to this.

In this embodiment, as shown in FIG. 6 , the proximal end of the wire binding tube 22 is provided with a protruding rib 226 , and the protruding rib 226 has a limiting function. In other embodiments, recesses can also be formed on the wire binding tube 22 to replace the protruding ribs.

The wire binding tube seat 23 is also a hollow structure, the distal end of which is connected to the wire binding tube 22 , and the proximal end is screwed with the wire locking unit 60 through threads.

The wire tie 24 is accommodated in the wire tie tube 22 , and the length of the wire tie 24 is greater than the length of the wire tie tube 22 , so that it can protrude from the side holes 224 of the wire tie tube 22 The wire binding loop 225, wherein the length of the formed wire binding loop 225 is related to the circumference of the tracheal stent 1 after being folded, for example, equivalent to half, one or two circumferences. In this embodiment, the number of the binding wires 24 is two, the number of the fixing wire holes is also two, the side holes 224 are distributed in two rows, and one end of each binding wire 24 is fixed at one end. In the fixing wire hole, the other end is connected to the wire locking unit 60 , each of the binding wires 24 corresponds to a row of side holes 224 and can protrude a wire binding loop 225 from the side holes 224 of the corresponding row.

The binding wire 24 needs to have good flexibility and high tensile strength. Therefore, in this embodiment, the binding wire 24 is made of multi-strand nickel-titanium wire material to meet the above requirements. The wire binding tube 22 not only needs to provide support for the binding wire 24, but also needs to have a certain flexibility to avoid damage to the trachea/bronchial tract. Therefore, the wire binding tube 22 is made of a biocompatible and flexible polymer. It is made of material, preferably polyetheretherketone (PEEK) material.

Please refer to FIG. 1 , FIG. 3 and FIG. 5 , the support unit 40 further includes a support rod seat 42 . The support rod 41 is disposed parallel to the wire binding tube 22 and can be moved along the axial direction of the wire binding tube 22 until the distal end of the support rod 41 is completely offset from the side holes 224 . The distal end of the support rod 41 can be inserted into the side positioning hole 214 and can be pulled out from the side positioning hole 214 , and the proximal end of the support rod 41 is fixed to the support rod seat 42 superior. A through hole 421 is provided on the support rod seat 42 along the axial direction of the support rod 41 , and the through hole 421 is used for the passage of the wire binding tube 22 , that is, the support rod seat 42 moves along the axial direction. The ground is sleeved on the wire binding tube 22 . The support rod 41 can be pulled out of the side positioning hole 214 by pulling the support rod seat 42 toward the proximal end, and the support rod 41 can be driven to the proximal end of the tracheal stent conveyor 2 in the axial direction. move in the end direction. The axial movable distance of the support rod 41 is greater than the axial distance L1 between the holes 224 on both sides of the head and tail, so as to ensure that the support rod 41 can be pulled away from all the wire binding rings 225, that is, to ensure that the support rod 41 Move in the axial direction until it is completely staggered from the side hole 224 (actually, the axial movable distance of the support rod 41 should be greater than the axial distance L1 between the fore and aft holes 224 and the fore side hole 224 (closest to the fore and aft holes). The sum of the axial distances between the side holes 224) of the connecting surface 218 and the connecting surface 218 can ensure that the support rod 41 can be pulled away from all the binding wires 24, but the head side hole 224 and the connecting surface 218 The sum of the axial distances is so small that it can be ignored, so generally only L1 can be considered).

In this embodiment, the outer surface of the support rod seat 42 is provided with lines, so that the operator can pull the support rod 41 away from the insertion cap 21 by operating the support rod seat 42 . In this embodiment, as shown in FIG. 6 , the shape of the through hole 421 matches the shape of the proximal end of the wire binding tube 22 , that is, the through hole 421 is formed with a shape that matches the protruding rib 226 . Because the convex rib 226 cooperates with the groove 422 to prevent rotation, the wire binding tube 22 and the support rod seat 42 cannot rotate relative to each other, which ensures that the support rod 41 will not be tied relative to each other. The wire tube 22 is rotated, so that after the closed end of the wire binding ring 225 is threaded on the support rod 41 , the support rod 41 remains stable, and the support rod 41 is drawn from the closed end of the wire binding ring 225 When pulling away, it can only move in a straight line along the axial direction to ensure smooth separation. It can be understood that the length of the protruding rib 226 on the wire binding tube 22 should be greater than the axial movable distance of the support rod 41, so that the protruding rib 226 can keep moving during the movement of the support rod 41. Match with the groove 422 . In other embodiments, if a recess is formed on the wire binding tube 22 to replace the protruding rib 226, a protruding rib matching the recess may be formed on the support rod seat 42, as long as the tying can be prevented The wire tube 22 and the support rod seat 42 only need to rotate relative to each other. In addition, at least one axial plane adapted to each other may be provided in the wire binding tube 22 and the through hole 421 of the support rod base 42 respectively as a rotation-stopping structure.

Since the binding wire 24 is tightened, a large force is generated on the support rod 41, so the support rod 41 needs to provide enough supporting force to keep the binding wire 24 stable. Therefore, preferably, the support rod 41 is made of biological material. Compatible and hard metal or polymer materials, such as stainless steel, polyoxymethylene (POM), etc.

Referring to FIG. 1 and FIG. 3 , the thread locking unit 60 includes a main body 61 and a thread locking device 62 equal in number to the number of the binding wires 24 . The wire lock 62 is used to fix the proximal end of the wire tie 24 and loosen or tighten the wire tie 24 . The main body 61 includes a main branch 63 and side branches 64 extending from the main branch in the same number as the binding wire 24 . The wire locking device 62 is correspondingly detachably connected to one of the side branches 64; Fixed on a wire lock 62 .

In this embodiment, the main body 61 includes two side branches 64 , that is, a four-way structure. The two wire ties 24 are drawn out from the wire tie tube 22 through one of the side branches 64 respectively. In this embodiment, two wire locks 62 are included, and each of the wire locks 62 is connected to the end of one side branch 64 . The wire lock 62 includes a distal knob 631 and a proximal knob 632; the distal knob 631 is used to tighten the wire lock 62 on the corresponding side branch 64; the proximal knob 632 Used to screw the binding wire 24 onto the wire locker 62 . It can be understood that, if one wire tie 24 is provided, only one of the side branches 64 and one of the wire locks 62 can also be provided.

1 , 3 , 4 and 8 , a specific operation mode of the tracheal stent system 100 provided by the embodiment of the present invention may be as follows: First, make each wire binding ring 225 self-tie the corresponding side of the wire tube 22 The hole 224 protrudes, the tracheal support 1 is folded in the axial direction, the wire binding tube 22 is placed in the folding gap formed by folding the tracheal support 1 along the axial direction, and the wire binding ring 225 is wound around the circumference of the tracheal support 1 once. Then, the distal end of the support rod 41 is inserted into the side positioning hole 214; after that, the tracheal stent 1 is completely tightened by pulling the binding wire 24 through the wire lock 62, clockwise Tighten the distal knob 631, screw the wire lock 62 on the side branch 64, and then tighten the proximal knob 632 clockwise to tighten and fix the tie wire 24, so that the tracheal support 1 is bound by the wire tie ring 225 It is fixed on the wire binding tube 22 and the support rod 41; then, the tracheal stent conveyor 2 bound with the tracheal stent 1 enters the trachea through a rigid bronchoscope, and after the tracheal stent 1 is sent to the lesion site, The support rod 41 is withdrawn to the proximal end, so that the support rod 41 is pulled away from the closed end of the wire binding ring 225, the wire binding ring 225 is scattered from the tracheal support 1, and the binding of the wire binding ring 225 to the tracheal support 1 is released. The stent 1 is released; finally, the tracheal stent carrier 2 is withdrawn as a whole. It can be understood that, as shown in FIG. 7 , after the wire binding loop 225 is scattered, the distal knob 631 of the wire locking device 62 can be loosened counterclockwise and the wire locking device 62 can be withdrawn, and the binding wire 24 can be gradually withdrawn, and finally The binding wire 24 is fully or substantially tucked within the binding wire tube 22 .

It can be understood that in other embodiments, the wire binding loop 225 can also be wrapped around the tracheal stent 1 for two or more turns, but the fewer the number of turns, the easier it is to untie the tracheal stent after the support rod 41 is withdrawn. 1 release time is shorter.

It can be understood that in other embodiments, the wire binding tube 22 can also be placed outside the folding gap formed by folding the tracheal stent 1 in the axial direction away from the opening of the folding gap. In this case, if the wire binding tube 22 is two The side holes 224 are provided on both sides, so that each wire binding ring 225 can be threaded onto the support rod 41 after at least half a turn. The two axially symmetrical side holes 224 just make the corresponding two wire binding rings 225 surround the tracheal stent 1 The tracheal stent 1 can also be tied by tightening the wire tie 24 in one turn; however, if the wire tie tube 22 is provided with side holes 224 only on one side, each wire tie ring 225 can be passed through the support rod 41 after at least one turn. To bind the tracheal stent 1.

Compared with the existing conveyors that use push rods to push out and release the tracheal stent, the tracheal stent conveyor 2 and the tracheal stent system 100 provided by the present invention wrap the tracheal stent 1 through the wire binding loop 225 and close the closed end of the wire binding loop 225. Thread to the support rod 41, so that the tracheal stent 1 is bound to the wire binding tube 22 and the support rod 41, by moving the support rod 41 to the proximal end and from the closed end of the wire binding ring 225 Internal extraction, so that the tracheal stent 1 is unbound and released, allowing the doctor to use the tracheal stent conveyor 2 to directly deliver the tracheal stent 1 to the location of the lesion to release, accurate positioning, no push rod is required, and the tracheal stent 1 is not easy to move after release. After pulling out the support rod 41 to release the binding wire 24, the tracheal stent 1 can be unfolded, and the release is convenient, so that the release time of the tracheal stent 1 is short, which can effectively reduce the risk of suffocation of the patient. In addition, the tracheal stent delivery device 2 of the present invention does not require a metal insertion tube, and the radial size of the tracheal stent 1 after binding the tracheal stent 1 on the wire binding tube 22 and the support rod 41 through the wire binding ring 225 is small, and the flexible The placement of the cap 21 can avoid the risk of damage to the glottis by the metal implanter and reduce the damage to the airway.

The above are the implementations of the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the embodiments of the present invention, several improvements and modifications can also be made. These improvements and modifications are also It is regarded as the protection scope of the present invention.

Claims (17)

1. The tracheal stent conveyor is characterized by comprising a binding unit and a supporting unit;

the binding unit comprises a binding wire tube and a binding wire, the binding wire is arranged in the binding wire tube in a penetrating mode, the far end of the binding wire is fixed relative to the far end of the binding wire tube, a plurality of side holes are formed in the far end of the binding wire tube, the binding wire extends out of the side holes to form a binding wire ring in a first state, the part, close to the side holes, of the binding wire ring is open, and the part, far away from the side holes, of the binding wire ring is closed, so that the binding wire ring is a closed end;

the supporting unit comprises a supporting rod which is arranged outside the binding pipe and moves along the axial direction of the binding pipe; in the first state, the wire binding ring is wound on the tracheal stent, and the closed end of the wire binding ring is arranged on the supporting rod in a penetrating manner and used for binding the tracheal stent on the wire binding tube and the supporting rod; under a second state, the distal end of bracing piece with the distal end of ligature pipe staggers and is close to the near-end of ligature pipe, the bracing piece is followed take out in the blind end of ligature ring and separate for unbinding trachea support.

2. The tracheal stent transporter of claim 1, further comprising a wire locking unit connected to a proximal end of the binding unit, the proximal end of the binding wire being fixed to the wire locking unit, the wire locking unit being configured to tighten the wire binding ring when binding the tracheal stent.

3. An endotracheal stent delivery device as recited in claim 1, wherein the binding unit further comprises an insertion cap having a distal end with a tapered tip, the distal end of the binding tube being secured to a proximal end of the insertion cap.

4. An endotracheal tube stent delivery device as defined in claim 3, wherein the proximal end of the insertion cap is axially provided with a central positioning hole and lateral positioning holes, the distal end of the binding tube being fixed in the central positioning hole, and the distal end of the support rod being movably received in the lateral positioning holes.

5. An endotracheal stent delivery device as defined in claim 4, wherein the proximal end of said insertion cap is further provided with a wire fixing hole along the axial direction, and the distal end of said binding wire is fixed in said wire fixing hole.

6. An endotracheal stent delivery device as recited in claim 3, wherein said insertion cap is made of a flexible material.

7. An endotracheal stent delivery device as defined in claim 1, wherein the binding wires are two in number; the side holes formed in the far end of the binding tube are arranged in two rows, and the two rows of side holes are oppositely arranged and are symmetrical about the axis of the binding tube; each row of the side holes corresponds to one binding wire and the corresponding binding wire extends out to form a binding wire ring.

8. An endotracheal stent delivery device as recited in claim 7, wherein adjacent ones of said side openings in each row are spaced apart by a distance in the range of 2 mm to 4 mm.

9. An endotracheal stent delivery device as recited in claim 7, wherein the axial movable distance of said support rod is greater than the axial distance between the leading and trailing ones of said side openings in each row.

10. The tracheal stent transporter of claim 2, wherein the binding unit further comprises a binding-wire tube base to which the proximal end of the binding-wire tube is fixed, the binding-wire tube base being connected to the locking-wire unit.

11. The tracheal stent transporter of claim 1, wherein the support unit further comprises a support rod seat movably sleeved on the wire binding tube in the axial direction, and the proximal end of the support rod is fixed to the support rod seat.

12. An endotracheal stent delivery device as defined in claim 11, wherein a rotation stop structure is provided between the wire binding tube and the support rod seat to prevent the support rod seat from rotating the support rod relative to the wire binding tube.

13. An endotracheal stent delivery device as defined in claim 2, wherein the wire locking unit includes a main body and a number of wire lockers equal to the number of the binding wires; the main body comprises a main branch and side branches which extend from the main branch and are equal to the binding wires in number; the wire locking device corresponds to and is detachably connected with the side branch; the binding wire tube, the main branch and the side branch are communicated with each other, and the proximal end of the binding wire is correspondingly fixed on a wire locking device.

14. An endotracheal stent delivery device as recited in claim 13, wherein said wire locker includes a proximal knob and a distal knob; the distal knob is used for screwing the wire locker on the corresponding side branch; the proximal end knob is used for winding the proximal end of the corresponding binding-wire on the corresponding binding-wire device.

15. An endotracheal stent delivery device as recited in claim 1, wherein said binding tube is made of a biocompatible and flexible polymeric material; the support rod is made of metal or high polymer materials which have biocompatibility and are hard.

16. An endotracheal stent system comprising an endotracheal stent made of an elastic material and an endotracheal stent delivery device according to any one of claims 1 to 15, wherein the endotracheal stent is folded and tied to the cuff and the support rod by the tying wire loop in the first state; under the second state, the distal end of bracing piece with the distal end of ligature pipe staggers and is close to the near-end of ligature pipe, thereby the bracing piece is followed it separates to pull out in the closed end of ligature ring unbinds tracheal stent.

17. A tracheal stent system as in claim 16, wherein the tracheal stent is cylindrical in shape in a natural state and has a plurality of protrusions on an outer circumference thereof.

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