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Microcatheter: the "fine tentacle" of interventional therapy

Public date:2025-07-14 15:29:40  Views:

Medical microcatheter is an interventional device with a slim outer diameter that is used to guide guide wires, deliver contrast media/drugs, or assist device delivery. It is suitable for minimally invasive surgery for tortuous, narrow, or deep vascular lesions.

【 Basic structure of Marine microcatheter 】

Unique composite structure:

Mesh weaving provides good support

The spiral weave ensures the flexibility of the tube

Can customize the large span mesh, spiral knitting density

PTFE lining:

Smooth internal cavity, reduce friction coefficient

It facilitates the delivery of coils, stents, and embolic agents

Rounded head end:

Make the catheter push smoother and safer

Gradual main body hardness, pipe diameter design:

It has both proximal push performance, distal flexibility and passability

Platinum iridium alloy developing ring:

Better visibility, more accurate positioning and safer operation

Hydrophilic coating:

Surface hydrophilic coating reduces push resistance

【 Marine processing capacity 】

The wall thickness tolerance was up to ±0.01mm.

The diameter control can reach ±0.02mm;

Model: 1.2Fr-3.2Fr

Support for customization

Main classification and characteristics of microcatheters

According to the clinical application scenario, microcatheters can be divided into the following three categories:

Coronary microcatheter:

Designed for complex coronary artery lesions (such as chronic total occlusion, calcification, bifurcation lesions), the unique PTFE lining and braided structure can enhance the stability of the guide wire, improve the efficiency of lesion crossing, and provide reliable support for coronary intervention.

Peripheral microcatheter:

It is suitable for long-segment operation of peripheral vessels such as iliofemoral artery, renal artery and subclavian artery. It has the characteristics of large lumen and high push force. Some models are preloaded with guide wires, which can simplify the preoperative preparation process and improve the operation efficiency.

Superselective microcatheter:

It is focused on high-precision targeted operation, with a diameter of up to 2.1Fr, and has excellent terminal vessel reach ability. It can realize precision drug delivery and device placement in tumor intervention (such as TACE, BAE, UAE) and super-branched anatomical area operations.

【 Application field of microcatheter 】

Cardiovascular Interventions

Treatment of CORONARY artery disease:

In coronary intervention, microcatheter has become an essential device to deal with complex lesions. For total or subtotal occlusion lesions, bifurcation lesions, severely calcified lesions and severely distorted lesions, microcatheters can reduce the complexity of interventional procedures and improve the success rate of surgery.

Pacemaker implantation:

During pacemaker implantation, the microcatheter is used to guide the electrode to accurately reach the predetermined position of the heart to ensure that the pacemaker can work properly and maintain the rhythm of the heart. It acts like a precise navigator, providing reliable guidance for the implantation of a pacemaker.

Neural intervention

Cerebral angiography:

Microcatheter is an important tool for cerebral angiography, through which the contrast agent is injected into the cerebral vessels, doctors can clearly observe the shape, structure and blood flow of cerebral vessels, so as to accurately diagnose cerebrovascular diseases, such as aneurysms and vascular stenosis. This accurate diagnosis provides a key basis for subsequent treatment planning.

Aneurysm embolization:

For intracranial aneurysms, microcatheters can deliver embolic materials to the aneurysm to fill the aneurysm cavity and prevent aneurysm rupture and bleeding. This is a minimally invasive surgical method. Compared with traditional craniotomy, it has the advantages of less trauma and faster recovery, which greatly reduces the surgical risk of patients.

Treatment of cerebral infarction: In the treatment of cerebral infarction, such as mechanical thrombectomy, microcatheters can help remove clots that block blood vessels in the brain, restore brain blood flow, and reduce brain tissue damage. Timely and effective thrombectomy can significantly improve the prognosis of patients with cerebral infarction and improve the quality of life of patients.

Tumor intervention

Tumor vascular embolization: the embolic agent is delivered to the blood supply vessels of the tumor through a microcatheter to block the blood supply of the tumor and cause the death of tumor cells due to lack of nutrition. This method can be used to reduce tumor symptoms or as an adjuvant therapy before surgery, reduce tumor volume and improve surgical resection rate.

Local injection of chemotherapeutic drugs: Injecting chemotherapeutic drugs directly into tumor tissue or its surrounding blood vessels through microcatheters can increase the local drug concentration, enhance the killing effect on tumor cells, and reduce systemic side effects. Compared with systemic chemotherapy, this local chemotherapy can more accurately target tumor cells and reduce the pain of patients.

Other Areas

Bile duct intervention: In bile duct intervention, microcatheters can be used to remove bile duct stones and expand bile duct strictures. It can help doctors to accurately deliver lithotomy instruments or balloon to the site of bile duct lesions and solve the problem of bile duct obstruction.

Ureteral intervention: Microcatheters also play an important role in the lithotripsy of ureteral stones and the dilatation of ureteral strictures. It provides a channel for ureteral interventional surgery, making the operation more accurate and safe.

With its "precision, efficiency and safety" characteristics, microcatheter plays an irreplaceable role in cardiovascular, neurological, tumor and other fields of interventional therapy. With the continuous innovation of technology, microcatheters will continue to expand their application boundaries and provide more accurate and reliable solutions for minimally invasive interventional therapy.