An injection catheter for vascular intervention with anti-reflux and anti-reflux accidental embolism

Abstract

The invention discloses a vascular intervention injection catheter capable of preventing error thrombosis caused by reflux and backflow, and belongs to the field of medical catheters. The injection catheter comprises a catheter body part, wherein the catheter body part is provided with a hollow structure which extends in a length direction; an expandable and contractable catheter wall section is arranged at one end of the catheter body part; the expandable and contractable catheter wall section is connected to an inner cavity contracted thin end; and an air embolism preventing connector is connected to the other end of the catheter body part. The catheter provided by the invention can cause deformation in accordance with pressure change in an adaptive mode; the catheter has an effect of preventing reflux and backflow; meanwhile, due to the design of the air embolism preventing connector, the formation of air embolism is prevented; and in addition, the catheter is simple in structure, low in manufacturing difficulty and cost and convenient to operate and use.

Description

technical field [0001] The invention relates to the field of medical catheters, in particular to an arterial anti-reflux and anti-thrombosis injection catheter for vascular intervention. Background technique [0002] Most existing catheters are balloon-structured catheters, which are catheters with balloon tips configured to at least partially occlude vessels in the body, such as blood vessels. Inflation by the balloon can help anchor the catheter at a specific location inside the vessel. [0003] CN1889993A discloses a balloon catheter by providing a smaller diameter non-profile balloon catheter, by eliminating the need for adhesives and welding etc. for the balloon, and by eliminating the In particular, a balloon catheter having an inflatable balloon at the tip portion of the shaft, a hollow shaft formed of balloon material is inserted into a hollow shaft formed of shaft material, and the tip portion of the inner hollow shaft is removed from the outer hollow shaft The po...

AI Technical Summary

Problems solved by technology

[0008] The patent documents listed above all disclose balloon catheters, which essentially belong to the category of double-lumen catheters. The inner tube does not deform during use, and the expansion of the blood vessel is realized through the physical expansion of the end of the outer tube. Although this Balloon catheter technology has made great progress, but there are still many problems, such as the double-chamber design increases the difficulty of manufacturing, and the catheter cannot adapt to blood pressure

[0009] There is also a single-cavity catheter design in the prior art. CN203507279U discloses a single-cavity central venous catheter. The front section of the catheter is covered with a front hard sleeve, and the rear section is covered with a rear hard sleeve. Through this setting, It solves the problem of low puncture rate and easy catheter bending in the body, which leads to blockage of vascular fistula

Although the design of this single cavity is simple and convenient, this utility model cannot meet the requirements of blood vessel expansion or contraction in arterial intervention

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