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Remote access catheter: The "Precision Navigation System" for Neurointerventional Therapy

Public date:2025-08-11 14:54:25  Views:

The Distal Access Catheter (DAC) is a high-performance delivery device specifically designed for endovascular interventional therapy, playing a core role as the "pathway founder" in the field of neurointervention. It enters the vascular system through percutaneous puncture, establishing a stable delivery channel from the body surface to deep intracranial lesions, providing crucial support for the subsequent delivery of therapeutic devices.

Compared with traditional guiding catheters, the DAC breaks through the depth limitation for reaching the lesion site and can access more distal lesion locations. Compared with intermediate catheters, it has stronger support performance and can provide a stable operation platform without the need for additional auxiliary devices. 

【Core Technology Advantages and Clinical Value】 

The distal access catheter demonstrates a "four-in-one" multifunctionality in clinical practice: 

The function of the guiding catheter: serving as a delivery channel for interventional devices such as microcatheters, coils, and stents.

The function of the angiographic catheter: injecting contrast agent for vascular imaging.

The function of the aspiration catheter: directly performing negative pressure thrombus aspiration.

The device retrieval channel: safely withdrawing devices such as thrombectomy stents. 

This multi-functional integrated design makes the remote access catheter an indispensable tool in the treatment of critical conditions such as acute stroke, significantly enhancing the efficiency and success rate of the surgery. 

【Hai Sheng Design】 

The excellence of the distal access catheter stems from its sophisticated multi-layer composite structure design. Each layer of material assumes a specific function, collectively achieving the engineering goal of "combining rigidity and flexibility". 

Four-layer composite structure: 

Inner layer: Precision Conveyance Channel

The inner layer is made of PTFE, featuring high lubricity and chemical resistance, ensuring smooth passage of instruments and adapting to complex internal body environments.

Marking Ring: The "Navigator" for Safe Operation

High visibility design: better visibility, more accurate positioning, and safer operation, assisting doctors in real-time and precise positioning of catheters and reducing operational risks.

Middle layer: Central Hub of Mechanical Properties

Mesh braided layer:

Available materials include 304 stainless steel, NITI, Tungsten, etc.

Braiding methods: 1*1, 1*2, 2*2, balancing support and flexibility.

Coil braided layer:

Available materials include 304 stainless steel, NITI, Tungsten, etc.

Braiding methods: single-strand / multi-strand coil braiding technology.

Customizable fixed or variable density structures are available to meet the differentiated hardness requirements of catheters for different lesion sites.

Outer layer: Biocompatible Barrier

Made of PEBAX material, balancing pushability and flexibility. 

Tube body design

The hardness gradient of the tube body is designed in segments with smooth transitions, achieving a perfect balance between proximal support and distal push force.

Extra-long hydrophilic coating section, ensuring smooth advancement without resistance.

15 cm ultra-long distal end, capable of reaching the middle cerebral artery. 

Head-end structure design

Malleable head-end for precise passage through tortuous blood vessels

Large inner cavity design at the head-end effectively enhances thrombus capture ability 

【Clinical Application Scenarios】 

Acute ischemic stroke:

In mechanical thrombectomy surgery, as a core device for establishing the access route, it assists the thrombectomy stent in reaching the thrombus location in the responsible vessel, supporting the thrombectomy operation and postoperative vascular assessment.

Interventional treatment of intracranial aneurysms:

It provides a stable delivery path for coil embolization and flow diverter device implantation, ensuring the precise placement of embolic materials.

Diagnosis and treatment of peripheral vascular diseases:

It is applicable to stenotic lesions in the iliac artery, renal artery, etc., assisting in the implementation of balloon angioplasty and stent implantation.

Interventional treatment of tumors:

In transcatheter arterial chemoembolization (TACE) for solid tumors such as liver cancer and lung cancer, it precisely delivers chemotherapy drugs and embolic agents to the tumor-feeding arteries. 

As a "precision navigation system" in modern interventional therapy, the distal access catheter has solved the problem of establishing complex vascular access through breakthroughs in multi-layer composite structure, hardness gradient design and surface treatment technology. In clinical applications, it has demonstrated outstanding passability, efficient platform support and significant safety advantages, becoming a core tool for the treatment of acute stroke, intracranial aneurysms and other diseases. With the acceleration of intelligentization, miniaturization and domestication, the distal access catheter will continue to drive minimally invasive interventional therapy towards a safer, more efficient and more accessible direction, opening up life-saving pathways for more patients with vascular diseases.