Balloon expansion type cavity stent conveying system

Abstract

The utility model discloses a balloon expanding type cavity stent conveying system which comprises a handle, a balloon double-cavity tube and a TIP plugging head connected to the end of the balloon double-cavity tube. Auxiliary tube sets used for assisting stent conveying are sequentially arranged on the outer portion of the balloon double-cavity tube in the length direction of the balloon double-cavity tube and comprise first auxiliary tubes and second auxiliary tubes used for enhancing axial supporting force to stably convey a stent, and outer sheath tubes used for forming a stable stent conveying channel. The rigidity of the first auxiliary pipe is greater than that of the second auxiliary pipe; according to the balloon dilatation type cavity stent, through the auxiliary tube set arranged on the periphery in the length direction of the outer sheath tube, thrust is effectively increased, the balloon dilatation type cavity stent can be pushed to a target position more smoothly, the hardness of the balloon double-cavity tube is increased through the wrapping tube, the stability and reliability of the balloon double-cavity tube in the operation process are improved, and the balloon dilatation type cavity stent can be conveniently and rapidly pushed to the target position. And the operation risk caused by the deformation of the balloon double-cavity tube is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to balloon stent delivery technical field, concretely relates to a balloon dilatation type cavity stent delivery system. BACKGROUND

[0002] In the treatment of biliary tract disease, the delivery of balloon dilatation type cavity stent is a key link. The traditional delivery system often has problems such as stent falling off, insufficient hardness of balloon double-lumen tube, insufficient pushing force, unstable stent delivery channel, easy damage of stent and easy entry of foreign matter during operation, which affects the treatment effect and the safety of patients. CONTENT OF THE UTILITY MODEL

[0003] Technical purpose: in view of the deficiency existing in the prior art stent delivery, the utility model discloses a balloon dilatation type cavity stent delivery system.

[0004] Technical scheme: in order to realize the above technical purpose, the utility model adopts the following technical scheme:

[0005] A balloon dilatation type cavity stent delivery system, including handle, balloon double-lumen tube and the TIP plugging head connected at the end of balloon double-lumen tube, the auxiliary pipe group for assisting the stent delivery is arranged in the length direction of balloon double-lumen tube outside balloon double-lumen tube in proper order, the auxiliary pipe group includes the first auxiliary pipe and the second auxiliary pipe for enhancing the axial support force and carrying out the stable delivery of stent, and the outer sheath tube for forming the stable delivery channel of stent, and the rigidity of first auxiliary pipe is greater than second auxiliary pipe.

[0006] Preferably, the delivery system of the utility model is provided with the position adjusting knob for adjusting the position of stent delivery on the first auxiliary pipe, and the first auxiliary pipe is moved to carry out the delivery of stent by the position adjusting knob.

[0007] Preferably, the first auxiliary pipe of the utility model is provided with the scale for controlling the delivery length.

[0008] Preferably, the first auxiliary pipe of the utility model adopts stainless steel pipe, the second auxiliary pipe adopts cladding pipe, and the first auxiliary pipe and the second auxiliary pipe are located at the outer periphery of the outer sheath tube, one end of the first auxiliary pipe close to the second auxiliary pipe is overlapped with the end of the second auxiliary pipe in the length direction, is sleeved on the outside of the second auxiliary pipe, and the end of the outer sheath tube is connected with the TIP plugging head after extending out of the second auxiliary pipe.

[0009] Preferably, the length of the position adjusting knob of the utility model is 5-25mm from the handle, the length of the first auxiliary pipe is 50-200mm, the length of the second auxiliary pipe is 500-2000mm, and the length of the outer sheath tube extending out of the second auxiliary pipe is 50-500mm.

[0010] Preferably, the TIP plugging head of the utility model adopts the structure of gradually reducing diameter along the moving direction of the bracket, and the end of the TIP plugging head adopts the arc transition for reducing the resistance of conveying movement.

[0011] Beneficial effects: the balloon dilatation type cavity bracket conveying system has the following beneficial effects:

[0012] 1. The auxiliary tube group arranged on the outer sheath tube along the length direction effectively increases the pushing force, so that the balloon dilatation type cavity bracket can be pushed to the target position more smoothly, and the hardness of the balloon double lumen tube is increased through the cladding tube, the stability and reliability of the balloon double lumen tube in the operation process are improved, and the operation risk caused by the deformation of the balloon double lumen tube is reduced.

[0013] 2. The design of the TIP plugging head can effectively protect the bracket from being damaged and foreign matters from entering the system during the bending operation process; the tapered design of the TIP plugging head port with gradually reducing diameter can guide the plugging head and the balloon double lumen tube to be quickly and accurately aligned and welded, reduce the installation difficulty and time, and improve the installation efficiency.

[0014] 3. The utility model designs the scale mark on the first auxiliary tube with large rigidity to limit the operation displacement of the position adjusting knob, which can prevent the position adjusting knob from being excessively rotated during the operation process, ensure that the conveying system is adjusted within a safe range, and avoid accidents caused by excessive adjustment.

[0015] 4. The utility model uses the outer sheath tube at the end of the conveying system, which can be bent to any angle, and the bending degree of the end of the conveying system can be adjusted to more accurately deliver the bracket to the lesion site, avoid the inaccurate placement of the bracket affecting the treatment effect, and ensure that the bracket smoothly passes through the curved section and reaches the target position. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced.

[0017] Figure 1 It is the overall structure diagram of the conveying system of the utility model;

[0018] Figure 2 It is the utility model Figure 1 It is the local enlarged view of area A in the utility model;

[0019] Figure 3 It is the end bending state schematic view of the conveying system of the utility model;

[0020] Figure 4 Figure 1 is a schematic diagram of the first auxiliary tube according to the present application;

[0021] Figure 5 Figure 1 is a schematic diagram of the first auxiliary tube according to the present application;

[0022] Figure 6 Figure 1 is a schematic diagram of the first auxiliary tube according to the present application;

[0023] Figure 7 Figure 1 is a schematic diagram of the first auxiliary tube according to the present application;

[0024] Figure 8 Figure 1 is a schematic diagram of the first auxiliary tube according to the present application.

[0025] wherein 1-handle, 2-balloon double lumen tube, 3-TIP occluder, 4-first auxiliary tube, 5-second auxiliary tube, 6-outer sheath tube, 7-position adjusting knob, 8-scale DETAILED DESCRIPTION

[0026] Reference will now be made in detail to embodiments of the present disclosure, one or more examples of which are set forth herein below. Each example and embodiment is provided by way of explanation of the present disclosure, not limitation. The following description provides a convenient illustration for implementing exemplary embodiments of the present disclosure. In fact, those of ordinary skill in the art will appreciate that various modifications and variations to the aspects of the present disclosure can be made without departing from the scope or spirit of the present disclosure. For example, features as disclosed or described with respect to one embodiment can be incorporated into another embodiment to produce yet another embodiment. It is intended that the present disclosure cover such modifications and variations as come within the scope of the following claims and their equivalents. Other objects, features, and aspects of the present disclosure will become apparent to one of ordinary skill in the art upon examination of the following detailed description. It is intended that any patent issued on the present disclosure will cover the alternatives, modifications, and equivalents of the present disclosure as falling within the scope of the following claims.

[0027] As Figures 1-8As shown in the utility model discloses a balloon dilatation type cavity stent delivery system, including handle 1, balloon double lumen tube 2 and the TIP plugging head 3 of connecting at the end of balloon double lumen tube 2, along the length direction of balloon double lumen tube 2 in turn set up the auxiliary pipe group for assisting to carry out stent delivery outside balloon double lumen tube 2, the auxiliary pipe group includes the first auxiliary pipe 4 and the second auxiliary pipe 5 for enhancing axial support force and carrying out stent stable delivery, and the sheath tube 6 for forming stent stable delivery channel, the rigidity of first auxiliary pipe 4 is greater than the second auxiliary pipe 5, and the stable delivery of balloon stent is realized by the setting of auxiliary pipe group, in the embodiment of the utility model, the first auxiliary pipe 4 of greater rigidity adopts stainless steel pipe, and the stainless steel pipe is thin-walled structure, can provide enough support strength, increases the thrust, so that balloon dilatation type cavity stent can be pushed to target position more smoothly, the second auxiliary pipe 5 is cladding pipe, is located the outside of sheath tube 6, increases the hardness of balloon double lumen tube, improves the stability and reliability of balloon double lumen tube in the operating process, avoids because deformation two and increases the operation risk, the end of first auxiliary pipe 4 close to the second auxiliary pipe 5 overlaps with the end of second auxiliary pipe 5 in length direction, is sleeved in the outside of second auxiliary pipe 5 to guarantee the structural strength at the joint, avoids the bending deformation, the end of sheath tube 6 stretches out after second auxiliary pipe 5 and is connected with TIP plugging head 3, and single sheath tube 6 provides stable channel for stent, and because the rigidity is lower, therefore can freely bend in the delivery process, by adjusting the bending degree of the end of delivery system, can more accurately send stent to the lesion site, avoids the inaccurate stent placement position and influences the treatment effect.

[0028] The length of the position adjusting knob 7 from the handle 1 is 5-25mm, the length of the first auxiliary pipe 4 is 50-200mm, the length of the second auxiliary pipe 5 is 500-2000mm, and the length of the sheath tube 6 extending out of the second auxiliary pipe 5 is 50-500mm.

[0029] For the convenience of controlling the delivery length, as shown in Figure 1 and Figure 4 The delivery system of the utility model sets the position adjusting knob 7 for adjusting the stent delivery position on the first auxiliary pipe 4, and the first auxiliary pipe 4 is moved by the position adjusting knob 7 to deliver the stent; the first auxiliary pipe 4 is provided with the scale 8 for controlling the delivery length, the operation displacement of the position adjusting knob 7 is limited by the scale, which can prevent the position adjusting knob from being excessively rotated during operation, ensure that the delivery system is adjusted within a safe range, and avoid accidents caused by excessive adjustment. The length and angle of the delivery system can also be accurately adjusted.

[0030] The design of the TIP plugging head can effectively protect the stent from being damaged and foreign matter entering the system during the bending operation, and by playing a guiding and directing role, it can reduce the delivery resistance, as shown in Figures 5-8 Four forms of TIP plugging heads are provided, and the end of the TIP plugging head 3 is transitioned in a circular arc form for reducing the delivery movement resistance, and a tapered structure is adopted near the end where the balloon double-lumen tube is located, which facilitates the butt joint of the structure, reduces the installation difficulty and time, and improves the installation efficiency; Figure 6 The TIP plugging head in Figure 8 adopts a diameter-reducing structure that gradually reduces in diameter in the moving direction of the stent delivery, away from the end of the balloon double-lumen tube; Figure 6 The TIP plugging head in Figure 8 directly adopts a tapered structure, and the profile of the side wall can also be optimized to form an arc-shaped edge structure as shown in , which can further reduce the delivery resistance and facilitate the delivery of the stent.

Claims

1. A balloon-expandable intracavitary stent delivery system, characterized in that, The device comprises a handle (1), a balloon double-lumen tube (2), and a TIP occlusion head (3) connected to the end of the balloon double-lumen tube (2); along the length direction of the balloon double-lumen tube (2), auxiliary tube groups for assisting stent delivery are arranged outside the balloon double-lumen tube (2) in sequence, the auxiliary tube groups comprise a first auxiliary tube (4) and a second auxiliary tube (5) for enhancing axial support force for stent stable delivery, and an outer sheath tube (6) for forming a stent stable delivery channel, the rigidity of the first auxiliary tube (4) is greater than that of the second auxiliary tube (5).

2. The balloon expandable luminal stent delivery system of claim 1, wherein, The delivery system is provided with a position adjusting knob (7) on the first auxiliary tube (4) for adjusting the position of stent delivery, and the first auxiliary tube (4) is moved by the position adjusting knob (7) to deliver the stent.

3. The balloon expandable luminal stent delivery system of claim 2, wherein, The first auxiliary tube (4) is provided with a scale (8) for controlling the delivery length.

4. The balloon expandable luminal stent delivery system of claim 2, wherein, The first auxiliary tube (4) is made of a stainless steel tube, the second auxiliary tube (5) is made of a cladding tube, the first auxiliary tube (4) and the second auxiliary tube (5) are located on the outer periphery of the outer sheath tube (6), one end of the first auxiliary tube (4) close to the second auxiliary tube (5) overlaps the end of the second auxiliary tube (5) in the length direction and is sleeved outside the second auxiliary tube (5), and the end of the outer sheath tube (6) extends out of the second auxiliary tube (5) and is connected to the TIP occlusion head (3).

5. The balloon expandable luminal stent delivery system of claim 3, wherein, The length of the position adjusting knob (7) from the handle (1) is 5-25mm, the length of the first auxiliary tube (4) is 50-200mm, the length of the second auxiliary tube (5) is 500-2000mm, and the length of the outer sheath tube (6) extending out of the second auxiliary tube (5) is 50-500mm.

6. The balloon expandable luminal stent delivery system of claim 1, wherein, The TIP occlusion head (3) adopts a variable diameter structure with gradually reduced diameter along the moving direction of the stent delivery, and a circular arc transition is adopted at the end of the TIP occlusion head (3) to reduce the resistance of the delivery movement.

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