CN100509076C - Angiography catheter with controllable tip direction - Google Patents

Abstract

The invention relates to a contrast catheter with controllable tip direction. In the present invention, a cavity is opened on the side wall of the contrast catheter and extends along the side wall, the traction wire is placed in between, the tip of the contrast catheter is inclined to the side of the cavity, and the top of the traction line is connected to the tip of the contrast catheter inclined to the side of the cavity. , the knob is connected to the side wall of the tail of the contrast catheter, and the end of the traction wire is connected to the knob through the cavity. The present invention solves the problem of multiple holes and traction wires in the prior art, and there are too many components, so it is difficult to achieve great results in the small-caliber vessel cavity, and the more complex the operation, the more difficult it is to accurately control and reach the lesion site, and it is easy to get out. Failure, coordination is cumbersome, and the position of the catheter tip may shift. The invention has simple structure and few parts, and the knob is on the side, which does not hinder the follow-up operation of the operator. Since a single traction wire is built into the side wall hole, it can be made into a contrast catheter with a diameter of 2mm or less to facilitate access to small-diameter blood vessels.

Description

Contrast catheter with controllable tip direction

technical field

The invention relates to an interventional operation instrument, in particular to a contrast catheter with a controllable tip direction.

Background technique

There are many kinds of contrast catheters that are often used in medical operations. They are made of polyethylene or polyvinyl chloride and other materials. The diameters of the catheters are large and small, and the shapes are also different. The purpose of use is to reach the lesion quickly and accurately. for further surgical intervention. However, in clinical applications, due to abnormal vascular running, vascular distortion, vascular lumen stenosis, and uncontrollable angiography catheters and guide wires, catheters and guide wires cannot reach the lesion as expected, thus hindering the next step of intervention. Surgical treatment poses difficulties.

Before the present invention, in order to solve this problem, a plurality of holes were arranged on the side wall of the catheter, and a plurality of pulling wires were put into different holes, and the tip of the catheter was connected with multi-stage movable tube joints. The traction wire is connected to the tube end cap on the tip, and the movement of the catheter tip is controlled by tightening and loosening the traction wire to reach the lesion. The disadvantages of this method are very obvious. First, there are multiple lumens and multiple traction wires, so it is difficult to make a big difference in the small-caliber vessel lumen. The second is that there are too many components, such as multiple traction wires, multiple movable tube joints, tube end caps, etc., which are difficult to apply in small-diameter blood vessel lumens; more components make the operation more complicated, and it is not easy to accurately control and reach the lesion parts, prone to failure. The third is that multiple traction wires are manually controlled, which is very troublesome to coordinate with each other, and it is also difficult to accurately control the accuracy. Once the hand is loosened, the position of the catheter tip may move. Fourth, there are so many parts and complex structure that it cannot be used in the case where the diameter of the blood vessel lumen is less than 2mm. Therefore, this steerable direction catheter can only be used for gastrointestinal and tracheal angiography, but not for intravascular lumen.

Contents of the invention

The object of the present invention is to overcome the above-mentioned defects, and to design and develop a simple and applicable contrast catheter whose tip direction can be controlled.

Technical scheme of the present invention is:

The contrast catheter with controllable tip direction, its main technical feature is that a hole is opened on the side wall of the contrast catheter, and the hole extends along the side wall, and the hole is separated from the catheter lumen of the contrast catheter itself. The contrast catheter tip is inclined to the side of the cavity, the top of the traction wire is connected to the tip of the contrast catheter inclined to the cavity side, the side wall of the tail of the contrast catheter is connected to the knob, and the end of the traction line is connected to the knob through the cavity.

The advantages and effects of the present invention are that only one pull wire is placed on the side wall of the catheter, so that the diameter of the catheter can be as small as possible; The direction of the tip of the catheter; the traction wire is led out from the side wall of the end of the contrast catheter, and a knob is connected to the end of the lead-out end. Pull the traction wire, adjust the direction of the catheter tip, and tighten the knob to fix the traction wire and the direction of the catheter tip at the same time. It is accurate and does not move after adjustment, has a simple structure and few parts, and the knob is on the side, which does not hinder the follow-up operation of the operator. Since a single traction wire is built into the side wall hole, it can be made into a contrast catheter with a diameter of 2mm or less to facilitate access to small-diameter blood vessels.

Description of drawings

Fig. 1 - schematic diagram of the structure principle of the present invention.

Detailed ways

As shown in Figure 1, the whole is a contrast catheter, the tip 1 of the contrast catheter is inclined to the side of the cavity 2, the angle is more than 5 degrees, and the optimal angle is between 20 and 30 degrees, in this case 25 degrees; On the side wall, a hole is set along the side wall of the catheter to form a cavity 2; a pull wire 4 is placed in the cavity 2, and one end of the pull wire 4 is connected to the catheter tip 1 inclined toward the side of the cavity 2, and the end of the pull wire 4 The other end is connected to the knob 6 through the cavity 2, and is led out by the knob 6. The knob 6 is arranged on the side wall of the catheter tail, forming a certain angle with the catheter; The lumens 3 are separated and do not affect each other.

During application, the contrast catheter is inserted into the blood vessel, and first reaches the vicinity of the diseased blood vessel, and the tip 1 of the inclined contrast catheter faces the diseased blood vessel; then the traction wire 4 is pulled to make the catheter tip 1 accurately Facing the blood vessel to be entered, tighten the knob 6 to fix the traction wire 4, that is, fix the direction of the catheter tip 1; Enter the diseased blood vessel, and then enter the next step of stent placement or balloon dilatation treatment; when withdrawing the catheter after the end, first rotate the knob 6, loosen the traction wire 4, so that the catheter tip 1 returns to its original shape, and the catheter is smoothly withdrawn from the blood vessel. The combined diameter of the pulling wire, the lumen, and the lumen of the angiography catheter can be less than 2 mm, which is suitable for angiography applications.

Claims (5)

1. The contrast catheter with controllable tip direction is characterized in that a cavity is opened on the side wall of the contrast catheter, and the cavity extends along the side wall. The cavity is separated from the catheter lumen of the contrast catheter itself, and the traction The contrast catheter tip is inclined to the side of the cavity, the top of the traction wire is connected to the tip of the contrast catheter inclined to the cavity side, the side wall of the tail of the contrast catheter is connected to the knob, and the end of the traction line is connected to the knob through the cavity. 2. The contrast catheter with controllable tip direction according to claim 1, characterized in that the tip of the contrast catheter bends to the side of the cavity at an angle of more than 5 degrees. 3. The contrast catheter with controllable tip direction according to claim 2, characterized in that the angle at which the tip of the contrast catheter bends toward the cavity side is between 20° and 30°. 4. The contrast catheter with controllable tip direction according to claim 1, characterized in that the turning in and out of the knob leads to loosening and tightening of the pulling wire. 5. The contrast catheter with controllable tip direction according to claim 1 or 4, characterized in that the combined diameter of the pulling wire, the lumen, and the lumen of the contrast catheter is less than 2 mm.

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