CN105662490B - Vascular Dilator Implantation Surgical Tool - Google Patents

Abstract

The invention relates to a medical appliance, in particular to a vascular dilator implantation operation tool. But including handle, cartridge axial displacement's push rod in the handle, the rear end of push rod is provided with the clamp plate, the cover is equipped with spiral jacket on the push rod, spiral jacket is coiled by special-shaped monofilament heliciform and forms, the upper and lower both ends symmetry in special-shaped monofilament cross-section is provided with centre gripping spiral and lower centre gripping spiral, and the one end fixed connection of special-shaped monofilament is in the front end of push rod, and the other end fixed connection of special-shaped monofilament is on the handle. The tool has the advantages of simple structure, convenient operation and wide application range.

Description

Vascular Dilator Implantation Surgical Tool

technical field

The invention relates to a medical device, in particular to a surgical tool for implanting a blood vessel dilator.

Background technique

At present, the commonly used cardiovascular dilation surgery is mainly to install stents or balloons. Since the cardiovascular pipeline is relatively thin, the operation during the operation is very troublesome. It takes a lot of time and energy to install and adjust the position of the stent, which brings difficulty and risk to the operation. Chinese patent 2010202319042 discloses a "cardiovascular dilation device" in which the mesh stent is installed in a guide tube in advance, and a stylet is also installed in the guide tube. During the operation, the guide tube is first implanted into the blood vessel, and then Use the die to push out the mesh support. Although this "cardiovascular dilation device" can simplify the operation to a certain extent and improve the accuracy of the mesh stent in place, its scope of application is limited because the diameter of the guide tube is larger than that of the mesh stent, and sometimes Increase the difficulty of the operation; another Chinese patent 2013200482005 discloses a "cardiovascular expansion device", which adopts a helical tube dilator formed by helical winding of monofilament, and a support rod is arranged in the lumen of the helical tube. The front end of the rod is provided with a fixed fork, and the middle section of the support rod is provided with a positioning hole. The monofilament is tightly wound on the support rod. The two ends of the monofilament are respectively inserted into the fixed fork and the positioning hole. The two ends of the monofilament pull out the support rod, and the diameter of the monofilament automatically expands to expand and support the blood vessel wall. It has a simple structure, convenient operation, and a wide range of applications. However, due to the integral fixed structure of the support rod, it is very difficult to install and release the two ends of the monofilament on the support rod, and it is easy to bring out the half-released monofilament in the process of pulling out the support rod, resulting in surgical failure.

Contents of the invention

The object of the present invention is to provide a surgical tool for implanting a blood vessel dilator with simple structure and convenient operation.

In order to achieve the above purpose, the present invention adopts the following technical solution: the surgical tool for implanting the vascular dilator includes a handle, and a push rod inserted in the handle to move axially, the rear end of the push rod is provided with a pressing plate, and the A spiral jacket is set on the push rod, and the spiral jacket is formed by helically coiling a special-shaped monofilament. The upper and lower ends of the section of the special-shaped monofilament are symmetrically provided with an upper clamping helix and a lower clamping helix. One end of the special-shaped monofilament is fixedly connected to the front end of the push rod, and the other end of the special-shaped monofilament is fixedly connected to the handle.

The upper clamping helix and the lower clamping helix are concave arc-shaped spiral grooves arranged on the special-shaped monofilament, and the arc-shaped spiral groove is arranged in parallel with the special-shaped monofilament.

The special-shaped monofilament includes a cylindrical monofilament body, and two spiral plates with arc-shaped sections fixedly connected to the upper and lower ends of the monofilament body and arranged symmetrically.

The inner wall of the handle is provided with an axially arranged keyway, and the push rod is provided with a spline matching the keyway.

The beneficial effects of the present invention are: the spiral jacket utilizes the upper clamping helix and the lower clamping helix on both sides to clamp the vascular dilator of the same helical shape, so that it is in a compressed and tightened state, and the tube diameter is small, which is convenient for implantation In the operation of the blood vessel, after implantation, the helical jacket is stretched by the push rod, and the dilator can be easily released, and the tool can be taken out. The structure is simple, the operation is convenient, and the application range is wide.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure with a dilator.

Figure 3 is a cross-sectional view of one embodiment of a shaped monofilament.

Figure 4 is a cross-sectional view of another embodiment of a shaped monofilament.

Figure 5 is a cross-sectional view of yet another embodiment of a shaped monofilament.

detailed description

As shown in Figure 1, the vascular dilator implantation surgical tool of the present invention includes a handle 1, a push rod 2 inserted in the handle 1 and movable axially, the rear end of the push rod 2 is provided with a pressing plate 3, and the handle 1 is a columnar structure, and the pressing plate 3 and the push rod 2 can slide axially in the handle 1. The push rod 2 is covered with a spiral jacket 4, and the spiral jacket 4 is a helical structure formed by spirally coiling a special-shaped monofilament. The material of the spiral jacket 4 is made of elastic plastic, stainless steel, etc. The upper and lower ends of the section of the special-shaped monofilament are symmetrically provided with an upper clamping helix 5 and a lower clamping helix 6, one end of the special-shaped monofilament is fixedly connected to the front end of the push rod 2, and the other end of the special-shaped monofilament is fixedly connected to the handle 1.

As shown in Figure 3 and Figure 4, the upper clamping helix 5 and the lower clamping helix 6 are concave arc-shaped spiral grooves arranged on the special-shaped monofilament, and the arc-shaped spiral groove is arranged in parallel with the special-shaped monofilament . The body of the special-shaped monofilament can adopt a cylindrical structure as shown in the figure, or a rectangular cylindrical structure with a rectangular cross section, or an elliptical cylindrical structure with an elliptical cross section.

As shown in Figure 5, as another embodiment of the present invention, the special-shaped monofilament includes a cylindrical monofilament body 41, and two arc-shaped cross-sections that are fixedly connected to the upper and lower ends of the monofilament body 41 and symmetrically arranged. Spiral plates 51,61.

In addition, the inner wall of the handle 1 is provided with an axially arranged keyway, and the push rod 2 is provided with a spline 51 matching the keyway. In this way, the push rod 2 can only be axially moved but not rotated through the key groove, and the range of axial movement of the push rod 2 can also be limited by reasonably setting the length of the key groove.

As shown in Figure 2, when in use, the monofilament of the helical vascular dilator is clamped between the upper clamping helix 5 and the lower clamping helix 6, due to the screw distance of the helical jacket 4—that is, the upper clamping helix The distance between 5 and the lower clamping helix 6 is smaller than the diameter of the monofilament of the helical dilator. At this time, the helical jacket 4 can clamp the dilator so that it will not loosen, and can be easily implanted in the blood vessel. After the dilator is inserted into the patient's blood vessel, press the pressure plate 3 and stretch the helical jacket 4 through the push rod. The pitch of the helical jacket 4 expands, and the dilator can be released. After the dilator is released, its diameter expands and is supported on the patient's blood vessel wall , the tool can now be removed.

Claims (1)

1. vessel dilator implant surgery instrument, including handle（1）, be inserted into handle（1）In the push rod that is axially movable（2）, The push rod（2）Rear end be provided with pressing plate（3）, it is characterised in that：The push rod（2）On be set with spiral chuck（4）, it is described Spiral chuck（4）It is to be formed by special-shaped monofilament helical coil, the upper/lower terminal in the special-shaped monofilament section is symmetrically arranged with Clamp spiral（5）With lower clamping spiral（6）, one end of special-shaped monofilament is fixedly connected on push rod（2）Front end, special-shaped monofilament it is another One end is fixedly connected on handle（1）On, the handle（1）Inwall on be provided with axially arranged keyway, the push rod（2）On It is provided with the spline for matching the keyway（51）.