Hypotube convenient for drug delivery

Abstract

The utility model provides a hypo tube convenient for drug delivery, which comprises a first rigid section used for connecting a tube seat and a pushing piece, a flexible section is fixed between the first rigid section and the pushing piece, the surface of the flexible section is provided with a first spiral groove and a second spiral groove, the first spiral groove is close to the pushing piece, and the second spiral groove is close to the pushing piece. The second spiral groove is close to the first rigid section, the wall thickness of the flexible section in the radial direction ranges from 0.02 mm to 0.5 mm, the depth of the containing groove needs to be smaller than the wall thickness of the flexible section, a second rigid section is arranged on one side of the first rigid section, a threaded groove is formed in the first rigid section, a threaded column is fixed to the second rigid section, and the threaded column is fixed to the second rigid section. According to the hypotube, the problem that when an existing hypotube passes through a complex and bent blood vessel, due to the fact that the hypotube made of metal materials is difficult to bend, the existing hypotube often difficultly passes through the blood vessel is solved.

Description

Technical Field

[0001] The utility model relates to the field of hypotubes, in particular to a hypotube which is convenient for drug delivery. Background Art

[0002] At present, percutaneous transluminal coronary angioplasty (PTCA) is the most common interventional surgical procedure in clinical practice. When doctors perform PTCA, they use a coronary balloon dilatation catheter to send it to the stenosis of the coronary artery through a peripheral artery (femoral artery or radial artery). The filled balloon can expand the narrow lumen, improve blood flow, and place a stent in the expanded stenosis to prevent restenosis.

[0003] In the related art, the balloon dilatation catheter usually includes a hypotube, a tube seat, an outer tube, an inner tube and a balloon. The doctor holds the tube seat and pushes the balloon to the vascular lesion. The hypotube provides a good driving force for the outer tube, the inner tube and the balloon. The hypotube is made of metal. However, when passing through a complex and curved blood vessel, it is difficult to pass because the hypotube made of metal is difficult to bend.

[0004] Therefore, it is necessary to provide a new hypotube that is convenient for drug delivery to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a hypotube that is convenient for drug delivery, which solves the problem that the existing hypotubes are often difficult to pass through complex and curved blood vessels because the hypotubes made of metal are difficult to bend.

[0006] The hypotube for drug delivery provided by the utility model comprises a first rigid section and a pushing member for connecting a tube seat, a flexible section is fixed between the first rigid section and the pushing member, a first spiral groove and a second spiral groove are opened on the surface of the flexible section, the first spiral groove is close to the pushing member, and the second spiral groove is close to the first rigid section;

[0007] The flexible end surface is provided with a plurality of accommodating grooves, and the accommodating grooves are located between the first spiral grooves.

[0008] In a preferred embodiment, the wall thickness of the flexible section in the radial direction is 0.02-0.5 mm, and the depth of the accommodating groove needs to be smaller than the wall thickness of the flexible section.

[0009] In a preferred embodiment, the pitch of the first spiral groove is greater than that of the second spiral groove.

[0010] In a preferred embodiment, the width of the first spiral groove and the second spiral groove are both 0.018-0.02 mm.

[0011] In a preferred embodiment, a plurality of openings are formed on the surface of the flexible section.

[0012] In a preferred embodiment, a second rigid section is disposed on one side of the first rigid section, a thread groove is formed on the first rigid section, a thread column is fixed on the second rigid section, and the thread column is threadedly connected to the thread groove.

[0013] Beneficial effects of the utility model:

[0014] 1. The flexible end of the utility model is provided with a first spiral groove and a second spiral groove, which can make the flexible end have a certain degree of bending when moving forward, so that the hypotube has good flexibility and pushability;

[0015] 2. When the length of the hypotube needs to be extended, the second rigid section can be connected to the first rigid section through a threaded column and a threaded groove. After the connection is completed, the second rigid section can be installed on the tube seat. The length of the hypotube can be flexibly adjusted, further increasing its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The main structure of the hypotube for drug delivery provided by the utility model is a stereoscopic view Figure 1 ;

[0017] Figure 2 The main structure of the hypotube for drug delivery provided by the utility model is a stereoscopic view Figure 2 ;

[0018] Figure 3 This is a plan view of the overall structure of the hypotube provided by the utility model for facilitating drug delivery.

[0019] Numbers in the figure: 1, first rigid section; 2, pushing member; 3, flexible section; 4, first spiral groove; 5, second spiral groove; 6, receiving groove; 7, through opening; 8, second rigid section; 9, threaded groove; 10, threaded column. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Please refer to Figure 1 , Figure 2 as well as Figure 3 ,in Figure 1 The main structure of the hypotube for drug delivery provided by the utility model is a stereoscopic view Figure 1 ; Figure 2 The main structure of the hypotube for drug delivery provided by the utility model is a stereoscopic view Figure 2 ; Figure 3This is a plan view of the overall structure of the hypotube provided by the utility model for facilitating drug delivery.

[0022] In the specific implementation process, Figure 1-Figure 3 As shown, it includes a first rigid section 1 for connecting to a tube seat and a pushing member 2, the pushing member 2 is used to transfer part of the power to the balloon, a flexible section 3 is fixed between the first rigid section 1 and the pushing member 2, a first spiral groove 4 and a second spiral groove 5 are provided on the surface of the flexible section 3, the first spiral groove 4 is close to the pushing member 2, the second spiral groove 5 is close to the first rigid section 1, the pitch of the first spiral groove 4 is greater than that of the second spiral groove 5, and the widths of the first spiral groove 4 and the second spiral groove 5 are both 0.018-0.02mm.

[0023] A plurality of through openings 7 are provided on the surface of the flexible segment 3 to further improve the bendability and flexibility of the flexible segment 3. A plurality of receiving grooves 6 are provided on the surface of the flexible end 3, and the receiving grooves 6 are located between the first spiral grooves 4. The radial wall thickness of the flexible segment 3 is 0.02-0.5 mm, and the depth of the receiving groove 6 needs to be smaller than the wall thickness of the flexible segment 3. An independent drug coating can be sprayed inside the receiving groove 6 to facilitate the delivery of the drug.

[0024] A second rigid section 8 is arranged on one side of the first rigid section 1, a thread groove 9 is opened on the first rigid section 1, a thread column 10 is fixed on the second rigid section 8, and the thread column 10 is threadedly connected with the thread groove 9. When the length of the sea wave tube needs to be extended, the second rigid section 8 can be connected to the first rigid section 1 through the thread column 10 and the thread groove 9. After the connection is completed, the second rigid section 8 can be installed on the tube seat. The length of the sea wave tube can be flexibly adjusted, further increasing its practicality.

[0025] Working principle of the utility model: the first spiral groove 4 and the second spiral groove 5 are provided on the flexible end 3 of the utility model, so that the flexible end has a certain degree of bending when advancing, so that the hypotube has good flexibility and pushing performance;

[0026] When the length of the sea wave tube needs to be extended, the second rigid section 8 can be connected to the first rigid section 1 through the threaded column 10 and the threaded groove 9. After the connection is completed, the second rigid section 8 can be installed on the tube seat. The length of the sea wave tube can be flexibly adjusted, further increasing its practicality.

[0027] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hypotube for facilitating drug delivery, comprising a first rigid section (1) for connecting to a tube seat and a pusher (2), characterized in that: A flexible section (3) is fixed between the first rigid section (1) and the pushing member (2); a first spiral groove (4) and a second spiral groove (5) are provided on the surface of the flexible section (3); the first spiral groove (4) is close to the pushing member (2), and the second spiral groove (5) is close to the first rigid section (1); A plurality of accommodating grooves (6) are provided on the surface of the flexible section (3), and the accommodating grooves (6) are located between the first spiral grooves (4).

2. The hypotube for facilitating drug delivery according to claim 1, characterized in that: The wall thickness of the flexible section (3) in the radial direction is 0.02-0.5 mm, and the depth of the accommodating groove (6) needs to be smaller than the wall thickness of the flexible section (3).

3. The hypotube for facilitating drug delivery according to claim 2, characterized in that: The pitch of the first spiral groove (4) is greater than that of the second spiral groove (5).

4. The hypotube for facilitating drug delivery according to claim 3, characterized in that: The width of the first spiral groove (4) and the second spiral groove (5) are both 0.018-0.02 mm.

5. The hypotube for facilitating drug delivery according to claim 4, characterized in that: The surface of the flexible section (3) is provided with a plurality of openings (7).

6. The hypotube for facilitating drug delivery according to claim 5, characterized in that: A second rigid section (8) is arranged on one side of the first rigid section (1); a thread groove (9) is provided on the first rigid section (1); a thread column (10) is fixed on the second rigid section (8); and the thread column (10) is threadedly connected to the thread groove (9).

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