What is Vascular Intervention Catheters?

 ●Classification of Vascular Intervention Catheters

Vascular interventional catheter is a necessary device for vascular interventional diagnosis and treatment. It belongs to special medical catheters. Usually, in a vascular interventional operation, several different types of vascular interventional catheters are used together.
Microcatheter refers to a reinforced catheter with a small diameter, which is used for guidewire support/exchange, passing through the lesion, and delivering contrast agents, drugs, stents, etc. From the perspective of microcatheter diameter, there is no strict size definition at present. The diameter of mainstream microcatheter products in the market is basically below 1.33mm, which are mainly used for coronary intervention and neurointervention. level interventional microcatheter etc.

The guide catheter provides a stable passage for other interventional devices, so that the device can reach the designated part of the blood vessel. It is used in various vascular interventional treatments and has the widest range of applications.

The intermediate catheter is a large lumen/long working length/high compliance support catheter between the conventional guiding catheter and the microcatheter. The use of the intermediate catheter is to make the access reach farther and get as close as possible to the target lesion, used for treatment path circuitous, emergency thrombectomy and other situations, often used in neurointerventional therapy.

 ●Structure and material of catheter for vascular intervention


From the perspective of the cross-sectional structure of vascular interventional catheters, the number of lumens can be divided into single-lumen, double-lumen, triple-lumen, and four-lumen structures; and the wall structure can be divided into inner, middle, and outer three-layer structures. The outer layer determines the shape, hardness and friction with the inner wall of the blood vessel, and is usually made of materials such as polyamide, polyurethane, and hydrophilic coating; the middle layer is a flexural stainless steel wire or fiber wire braided structure to prevent the guide cavity from collapsing ; The inner material is mainly polytetrafluoroethylene (PTFE), which can reduce the frictional resistance between interventional materials such as balloons and stents and the lumen of the catheter, and prevent thrombus.
From the perspective of the longitudinal structure of the vascular interventional catheter, it can be roughly divided into soft visible head end (with platinum-iridium alloy development mark), middle section, anti-bending section, twist control section and other parts. Some catheters with special functions also have other functions. A structure, such as a balloon catheter, has a balloon structure.

Material / Performance  / Application

PU /  Excellent tensile strength, blood compatibility and biocompatibility/ tube material

PA / Softer, easier to fold and retract the catheter or introducer sheath / Block material, tube outer layer material, balloon material

PE /  light weight / Catheter Adapter Material

PVP / Excellent solubility and physiological compatibility /  Outer material

Stainless steel wire / good mechanical properties /  middle braid material

PTEE / Excellent self-lubricating performance /  inner layer material

PC / Good impact resistance, high refraction car, good processability catheter seat material

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