A compression and gripping method for improving balloon catheter leakage

Abstract

The present invention provides a crimping method for improving leakage of a balloon catheter, which belongs to the field of medical technology, and comprises: setting a crimping tool; sleeve the crimping tool on the balloon catheter; controlling the aperture of a accommodating cavity of a crimping loading device to wrap the outer surface of the crimping tool; punching the balloon catheter; removing the crimping tool from the balloon catheter; sleeve a stent on the treated balloon catheter; reducing the outer diameter of the stent by crimping the stent until the stent is fixed on the balloon catheter; the crimping method for improving leakage of a balloon catheter of the present invention performs preliminary processing on the balloon catheter by the crimping tool before the stent is crimped on the balloon catheter, and during the crimping process of the stent, the balloon catheter may not be punched, thereby reducing the damage to the balloon catheter caused by the stent during the crimping process, and thus improving the damage to the balloon catheter caused by the stent during the crimping process.

Description

Technical Field

[0001] The invention relates to the field of medical technology, and in particular to a compression and gripping method for improving balloon catheter leakage. Background Art

[0002] Cardiovascular disease is one of the major diseases that threaten human health. Percutaneous coronary intervention (PCI) is a treatment method that uses cardiac catheter technology to clear narrow or even blocked coronary artery cavities, thereby improving myocardial blood flow. This treatment method has created a new era in the treatment of coronary heart disease. With the rapid development of medical technology, in recent years, the use of stents to improve myocardial blood flow in interventional treatment has become the main treatment method, so stents have become commonly used medical devices.

[0003] Before use, the stent needs to be pressed onto the outer surface of the balloon catheter to reduce the outer diameter of the stent so that the stent can smoothly reach the lesion site during use, thereby achieving a therapeutic effect. Existing stent pressing methods mainly use a pressing and loading device to heat the stent and the balloon catheter and lower the aperture to reduce the outer diameter of the stent. In addition, in order to better combine the balloon catheter with the stent during the pressing and grasping process, the balloon catheter is often pressurized.

[0004] However, this compression and gripping method causes the balloon catheter to be subjected to shear force during the compression and gripping process of the stent and expansion force during the inflation process, making the balloon catheter easily damaged and causing leakage. Summary of the invention

[0005] Therefore, the present invention proposes a crimping method to improve the damage of the stent to the balloon catheter during the crimping process.

[0006] In order to solve the above technical problems, the present invention provides a method for improving the leakage of a balloon catheter, comprising the following steps:

[0007] Set up the crimping tooling;

[0008] The crimping tooling sleeve is mounted on the balloon catheter and placed together in the receiving cavity of the crimping loading device;

[0009] Control the aperture of the receiving cavity of the crimping loading device to wrap the outer surface of the crimping tooling;

[0010] Inflating the balloon catheter at a first preset temperature and maintaining the temperature for a first period of time;

[0011] Remove the balloon catheter and the crimping tool from the crimping loading device, and remove the crimping tool from the balloon catheter;

[0012] The stent is sheathed on the processed balloon catheter and placed together in the receiving cavity of the crimping and gripping loading device;

[0013] At the second preset temperature, the aperture of the accommodating cavity of the crimping loading device is controlled, and the outer diameter of the stent is reduced by crimping the stent until the stent is fixed on the balloon catheter.

[0014] As a preferred solution, the crimping tool is in a ring shape with a plurality of through holes on the outer wall.

[0015] As a preferred embodiment, the inner diameter of the crimping tool is 2.2 mm ± 0.1 mm, and the outer diameter of the crimping tool is 2.4 mm ± 0.1 mm.

[0016] As a preferred embodiment, the through hole on the outer wall of the crimping tool is a square hole, and the side length of the square hole is 2mm±0.1mm.

[0017] As a preferred solution, the through holes on the outer wall of the crimping tool are arranged in a staggered manner.

[0018] As a preferred solution, the method further includes the following steps: after the stent is fixed on the balloon catheter, the stent is maintained for a second period of time, and then the stent and the balloon catheter are withdrawn from the crimping and loading device.

[0019] As a preferred solution, the second time period is 120±10 seconds.

[0020] As a preferred embodiment, the first preset temperature is the glass transition temperature of the balloon catheter.

[0021] As a preferred solution, the first time period is 60±10 seconds.

[0022] As a preferred solution, the second preset temperature is room temperature.

[0023] The technical solution of the present invention has the following advantages:

[0024] 1. The crimping method for improving balloon catheter leakage provided by the present invention performs preliminary processing on the balloon catheter by means of a crimping tool before the stent is crimped on the balloon catheter. Specifically, the crimping tool is sleeved on the balloon catheter, and the balloon catheter is pressurized and formed in the early stage by means of a crimping loading device. The crimping is performed after the stent is sleeved on the balloon catheter. In this way, the balloon catheter does not need to be pressurized during the crimping process of the stent, thereby reducing the damage to the balloon catheter caused by the stent during the crimping process, and thus improving the damage to the balloon catheter caused by the stent during the crimping process.

[0025] 2. The present invention provides a crimping method for improving balloon catheter leakage, wherein a plurality of through holes are provided on the crimping tooling to reserve positions for balloon inflation. The plurality of through holes on the crimping tooling are arranged in a staggered manner, so that the positions for balloon inflation are evenly distributed on the balloon. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The present invention is a flow chart of the crimping method for improving balloon catheter leakage.

[0028] Figure 2 This is a schematic diagram of the unfolding of the crimping tooling.

[0029] Description of reference numerals:

[0030] 1. Crimping tool; 2. Through hole. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] This embodiment provides a method for improving the compression and gripping of a balloon catheter. Figure 1 As shown, the following steps are included:

[0036] Step 1, set up a crimping tool 1, which is a ring-shaped crimping tool 1 with a plurality of through holes 2 on the outer wall. The plurality of through holes 2 are arranged in a plurality of rows, with two holes in each row, and the through holes 2 in the second row are arranged alternately with the through holes 2 in the first row. Specifically, the through holes 2 can be arranged as square holes, and the side length of the square holes is 2mm±0.1mm. The inner diameter of the crimping tool 1 is 2.2mm±0.1mm, and the outer diameter is 2.4mm±0.1mm. The crimping tool 1 adopts L605 cobalt-chromium alloy tube, and its length is adapted to the length of the bracket, specifically including 10mm and 15mm, etc.; Figure 2 As shown, when the length of the crimping tool 1 is 10 mm, the number of the through holes 2 is 8; when the length of the crimping tool 1 is 15 mm, the number of the through holes 2 is 12.

[0037] Step 2: Place a set of crimping tooling on the balloon catheter and place them together in the accommodating cavity of the crimping loading device.

[0038] Step 3: Control the aperture of the accommodating cavity of the crimping loading device to wrap the outer surface of the crimping tooling 1.

[0039] Step 4: Pressurize the balloon catheter at a first preset temperature and maintain it for a first period of time; wherein the first preset temperature is the glass transition temperature of the balloon catheter, the first period of time is 60±10 seconds, and the pressure at which the balloon catheter is pressurized is lower than the nominal pressure of the balloon catheter. The glass transition temperature of the balloon catheter is related to the selected balloon raw material, and the preferred temperature is 40-60°C.

[0040] Step 5: Remove the balloon catheter and the crimping tool 1 from the crimping loading device, and remove the crimping tool 1 from the balloon catheter.

[0041] Step 6: Place the stent on the processed balloon catheter and place them together in the receiving cavity of the crimping and loading device.

[0042] Step seven, at a second preset temperature, control the aperture of the accommodating cavity of the crimping loading device, and reduce the outer diameter of the stent by crimping the stent until the stent is fixed on the balloon catheter; wherein the second preset temperature is room temperature.

[0043] Step 8: After the stent is fixed on the balloon catheter, maintain the second time period, and then withdraw the stent and the balloon catheter from the crimping and loading device; wherein the second time period is 120±10 seconds.

[0044] According to the method of this embodiment, the crimping tool 1 is firstly set on the balloon catheter, and the balloon catheter is inflated and formed in the early stage by using the crimping loading equipment, and then the stent is set on the balloon catheter for crimping. In this way, during the crimping process of the stent, the balloon catheter does not need to be pressurized, thereby reducing the damage to the balloon catheter caused by the stent during the crimping process, and thus improving the damage to the balloon catheter caused by the stent during the crimping process.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A method for improving the leakage of a balloon catheter, characterized in that: The following steps are involved: A crimping tool (1) is provided, wherein the crimping tool (1) is in the form of a ring having a plurality of through holes (2) on its outer wall, and the length of the crimping tool (1) is adapted to the length of the bracket; The crimping tool (1) is sleeved onto the balloon catheter and placed together in the receiving chamber of the crimping loading device; Controlling the aperture of the receiving cavity of the crimping loading device to wrap around the outer surface of the crimping tooling (1); Inflating the balloon catheter at a first preset temperature and maintaining it for a first period of time, wherein the first preset temperature is the glass transition temperature of the balloon catheter; Remove the balloon catheter and the crimping tool (1) from the crimping loading device, and remove the crimping tool (1) from the balloon catheter; The stent is sheathed on the processed balloon catheter and placed together in the receiving cavity of the crimping and gripping loading device; At a second preset temperature, the aperture of the accommodating cavity of the crimping loading device is controlled, and the outer diameter of the stent is reduced by crimping the stent until the stent is fixed on the balloon catheter. During the crimping process of the stent, the balloon catheter is not pressurized.

2. The crimping method for improving balloon catheter leakage according to claim 1, characterized in that: The inner diameter of the crimping tool (1) is 2.2 mm ± 0.1 mm, and the outer diameter of the crimping tool (1) is 2.4 mm ± 0.1 mm.

3. The crimping method for improving balloon catheter leakage according to claim 2, characterized in that: The through hole (2) on the outer wall of the crimping tool (1) is a square hole, and the side length of the square hole is 2 mm±0.1 mm.

4. The crimping method for improving balloon catheter leakage according to any one of claims 1 to 3, characterized in that: The through holes (2) on the outer wall of the crimping tool (1) are arranged in a staggered manner.

5. The crimping method for improving balloon catheter leakage according to any one of claims 1 to 3, characterized in that: The following steps are also included: After the stent is fixed on the balloon catheter, it is maintained for a second period of time, and then the stent and the balloon catheter are withdrawn from the crimping and loading device.

6. The crimping method for improving balloon catheter leakage according to claim 5, characterized in that: The second time period is 120±10 seconds.

7. The crimping method for improving balloon catheter leakage according to any one of claims 1 to 3, characterized in that: The first time period is 60±10 seconds.

8. The crimping method for improving balloon catheter leakage according to any one of claims 1 to 3, characterized in that: The second preset temperature is room temperature.

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