CN210749389U

CN210749389U - Intravascular capture device

Info

Publication number: CN210749389U
Application number: CN201920938164.7U
Authority: CN
Inventors: 肖智林; 向羿; 陈晓彬; 孙权; 张银妆
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-06-16
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses an intravascular capturing device, which comprises a flexible guide catheter, an inflatable balloon, a pressure pump, a guide catheter bending control part and a guide wire; the guide wire enters the flexible guide catheter from the front end of the flexible guide catheter, extends out of the tail end of the flexible guide catheter, then turns back to the tail end and forms a catching ring outside the tail end; the inflatable balloon is arranged at the tail end of the flexible guide catheter during operation, is communicated with the pressure pump at one end far away from the tail end, and is used for being expanded by pressurization of the pressure pump so as to fix the guide wire part returning to the tail end by extrusion; the guide catheter bending control comprises a fixing piece embedded in the tube wall of the tail end of the flexible guide catheter and a traction wire connected with the fixing piece, wherein the traction wire extends out of the front end of the flexible guide catheter along the tube wall of the flexible guide catheter. The utility model discloses an intravascular capture device can realize the capture of intravascular foreign matter.

Description

Intravascular capture device

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an intravascular capture device.

Background

In real life, foreign matter may exist in a blood vessel of a living body. These foreign bodies may originate from a fallen thrombus in the blood vessel, from a fallen or displaced medical instrument (e.g., dialysis tube, stent), and the like. Capturing and cleaning these foreign bodies is a problem that is currently being regarded as important in the medical field.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to solve one or more of the problems mentioned in the background art section above by means of an improved intravascular capture device.

To achieve the purpose, the utility model adopts the following technical proposal:

an intravascular capturing device comprises a flexible guide catheter, an inflatable balloon, a pressure pump, a guide catheter bending control and a guide wire; the guide wire enters the flexible guide catheter from the front end of the flexible guide catheter and is folded back into the tail end of the flexible guide catheter after extending out of the tail end of the flexible guide catheter and forms a catching ring outside the tail end; the inflatable balloon is hollow, is arranged at the tail end of the flexible guide catheter during operation, is communicated with the pressure pump at one end far away from the tail end, and is used for being pressurized and expanded by the pressure pump so as to fix a guide wire part which returns to the tail end by being extruded and folded; the guiding catheter bending control comprises a fixing piece embedded in the tube wall at the tail end of the flexible guiding catheter and a traction wire connected with the fixing piece, wherein the traction wire extends out of the front end of the flexible guiding catheter along the tube wall of the flexible guiding catheter.

In some embodiments, the anchor is integrally formed with the wall of the distal end of the flexible guide catheter.

In some embodiments, the guidewire is made of a memory alloy wire.

In some embodiments, the intravascular capture device further comprises a handle fixedly connected to one end of the guidewire.

The utility model provides an it has following characteristics to arrest in the blood vessel: the catching ring formed by the bent guide wire effectively catches the foreign bodies in the blood vessels, and the flexible guide catheter is controlled by the guide catheter bending control to realize real-time and flexible deformation, so that the catching ring is favorable for better catching the foreign bodies in the blood vessels.

Drawings

Fig. 1 is a schematic structural view of an intravascular trap according to an embodiment of the present invention;

fig. 2 is a schematic diagram of capturing a foreign object in a blood vessel using an intravascular capture device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural view of an intravascular capture device 100 according to an embodiment of the present invention. As shown in fig. 1, the intravascular trap 100 according to the present embodiment includes: flexible guide catheter 101, inflatable balloon 102, pressure pump 106, guide catheter bending control, guide wire 103.

In this embodiment, the guide wire 103 enters the flexible guide catheter 101 from the front end of the flexible guide catheter 101 and is folded back into the tip of the flexible guide catheter 101 after protruding from the tip and forming an arc-shaped capturing ring 1032 outside the tip. The medical staff can shape the guide wire tip of the guide wire 103 with a guiding needle according to the diameter of the conduit of the flexible guiding catheter 101 before the guide wire 103 enters the flexible guiding catheter 101 in the actual operation. The tip of the guide wire bent by shaping is easily folded back into the tip of the flexible guide catheter 101 after extending out of the flexible guide catheter 101. Even if the operation is not carried out at one time, the guide wire head end can be folded back to enter the tail end through several operations normally. To improve the shaping effect, the guide wire may optionally be made of a memory alloy wire.

In this embodiment, the inflatable balloon 102 is in communication with the pressure pump at the trailing end (i.e., at the end distal to the aforementioned end). In operation, the pressure pump 106 is connected to the tail end of the inflatable balloon 102, and the suction is repeated for 2-3 times, so that the inflatable balloon 102 maintains a negative pressure state (a contracted state). The inflated balloon in the deflated state may then be pushed along the inner tube of the flexible guiding catheter 101 to or against the tip of the flexible guiding catheter 101 by means of the pressure pump 106 (although other means, such as a guide wire, may also be used). Since the inflatable balloon 102 is now in a deflated state, the wire portion 1031 of the wire 103 that has been folded back into the tip is generally not pushed out of the tip.

Of course, it is determined whether the guide wire 103 is folded back into the tip and then the inflatable balloon 102 is pushed to the tip, or the inflatable balloon 102 is pushed to the tip and then the guide wire 103 is folded back into the tip, which is repeated several times in practice, and the different operation sequences are not limited herein.

In operation, the inflatable balloon 102 is disposed at the distal end of the flexible guide catheter 101. The inflatable balloon 102 is inflated by the pressurization of the pressure pump 106 so that it can be secured by squeezing the portion 1031 of the guidewire folded back into the tip. After inflation of the inflatable balloon 102, the guidewire 103 is advanced. At this time, since the wire portion 1031 folded back into the tip is relatively fixed by the pressure of the inflatable balloon 102 after inflation, the pushing of the wire 103 directly carries the wire portion on the opposite side of the wire portion 1031 (the wire portion on the opposite side and the wire portion 1031 are located on the opposite sides of the inflatable balloon 102), and the influence on the relatively fixed wire portion 1031 is small, so that the size of the capturing ring 1032 can be adjusted. That is, pushing the guidewire 103 will cause displacement of the guidewire portion opposite the guidewire portion 1031 without substantial displacement of the guidewire portion 1031, thereby enlarging the capture snare 1032. While pulling the wire 103 outward causes displacement of the wire portion opposite the wire portion 1031 without substantial displacement of the wire portion 1031, thereby reducing the capture snare 1032.

In this embodiment, the guiding catheter bending control comprises a fixing member 104 embedded in the wall of the distal end of the flexible guiding catheter 101 and a pulling wire 105 connected to the fixing member 104, wherein the pulling wire 105 extends out of the front end of the flexible guiding catheter 101 along the wall of the flexible guiding catheter 101.

In this embodiment, the flexible guide catheter 101 may be made of a resilient polymeric material (e.g., nylon), as an example. Thus, when necessary, in the case of pushing or pulling by applying an external force to the pulling wire 105, the pulling wire 105 pushes or pulls the fixing member 104, thereby guiding the shape of the flexible guiding catheter 101 to be changed accordingly so as to obtain a curved shape desired by the doctor.

Fig. 2 is a schematic diagram of capturing a foreign object in a blood vessel using the intravascular capture device 100 according to an embodiment of the present invention. As an example, the inflatable balloon 102 may be first inflated using the pressure pump 106 to inflate it to compress the guidewire portion 1031 folded back into the distal end of the flexible guide catheter 101 such that the guidewire portion 1031 is immobilized or substantially immobilized relative to the flexible guide catheter 101. Subsequently, the guide wire 103 may be pushed towards the end of the flexible guiding catheter 101, thereby expanding the capture snare 1032 to a suitable size for capturing/trapping the foreign body 107 within the blood vessel. By way of example, the foreign body 107 may be an intravascular thrombus, a detached vascular stent, or other item. After the catching ring 1032 catches the foreign object 107, the operator may pull back the guide wire 103 in a direction opposite to the pushing direction so as to cause the catching ring 1032 to be retracted into the flexible guide catheter 101 together with the caught foreign object 107, thereby achieving the catching and subsequent cleaning of the foreign object 107.

In this embodiment, the fixing member 104 may be fixed to the wall of the distal end of the flexible guiding catheter 101 by screws, bolts, or the like. However, as an alternative implementation, the fixing member 104 and the wall of the distal end of the flexible guiding catheter 101 may be integrally formed, thereby helping to reduce the number of parts and enhancing the adhesion of the fixing.

In an alternative implementation of this embodiment, the guide wire 103 or the pull wire 105 is made of a memory alloy wire.

In an alternative implementation of this embodiment, the intravascular trap 100 further comprises a handle (not shown) fixedly connected to one end of the guide wire 103 (the end remote from the tip of the flexible guiding catheter 101), so that the guide wire 103 can be better pushed or pulled back by means of the handle.

Technical scheme can catch the interior foreign matter of blood vessel effectively through catching snare 1032, also through the crooked controlling part control of guide pipe flexible guide pipe 101 realizes real-time, nimble deformation to help better in the blood vessel catch the foreign matter.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. An intravascular capture device is characterized by comprising a flexible guide catheter, an inflatable balloon, a pressure pump, a guide catheter bending control and a guide wire;

the guide wire enters the flexible guide catheter from the front end of the flexible guide catheter and is folded back into the tail end of the flexible guide catheter after extending out of the tail end of the flexible guide catheter and forms a catching ring outside the tail end;

the inflatable balloon is hollow, is arranged at the tail end of the flexible guide catheter during operation, is communicated with the pressure pump at one end far away from the tail end, and is used for being expanded by pressurization of the pressure pump so as to fix a guide wire part which returns to the tail end by being extruded and folded;

the guiding catheter bending control comprises a fixing piece embedded in the tube wall at the tail end of the flexible guiding catheter and a traction wire connected with the fixing piece, wherein the traction wire extends out of the front end of the flexible guiding catheter along the tube wall of the flexible guiding catheter.

2. The intravascular trap of claim 1, wherein the securing member is integrally formed with a wall of the distal end of the flexible guiding catheter.

3. The intravascular capture device of claim 1, wherein the guidewire is made of a memory alloy wire.

4. The intravascular capture device of claim 1, further comprising a handle fixedly attached to an end of the guidewire.