Extruded PE Tubes with Braided Spring Tube For Cardiovascular Intervention And Urology

Introduction

Braided spring-loaded tubing is a high-performance medical catheter material that combines braiding and spring reinforcement structures. By embedding a precise network of metal or fiber filaments within the catheter wall, it significantly improves the catheter's mechanical properties, making it a key technology for achieving precise control and safe delivery in modern minimally invasive interventional surgeries.

What is a braided Spring tube? — Structure and definition

Braided spring tubing is a composite conduit whose inner wall typically contains two key reinforcing layers:

Braided layer: Made of stainless steel wire, nickel-titanium wire, or polymer fiber filaments woven in a mesh pattern, it is usually located in the middle layer of the catheter. This structure gives the catheter high strength and torsion control, allowing the internal end to respond precisely and synchronously when the doctor rotates the catheter externally.

The coiled layer: composed of tightly wound metal wires in a spiral pattern, it can exist alone or in combination with the braided layer. It primarily provides flexural strength and flexibility, ensuring the catheter remains patent in tortuous blood vessels and preventing collapse.

Braided spring tube

Braided spring tube

Medical Applications – The “Main Force” of Minimally Invasive Interventions

Braided reed tubes are primarily used in minimally invasive interventional procedures where instrument performance requirements are highest, establishing safe and stable pathways for various treatments.

Neurointervention: Used for microcatheters and guiding catheters. In treating intracranial aneurysms or vascular stenosis, catheters must traverse extremely tortuous cerebral vascular pathways. The braided coiled structure ensures that the catheter provides sufficient support while remaining flexible at the tip to avoid damaging the vessel, and allows for precise delivery of coils or stents to the lesion.

Cardiovascular intervention: Used for guiding catheters and balloon catheters. In coronary or peripheral vascular interventions, the catheter needs to be "hooked" and stably supported at the aortic ostium to allow for the smooth passage of devices such as balloons and stents. The braided spring structure provides the necessary flexural strength and pushing force.

Urological/Digestive Interventions: Used for ureteroscopic sheaths, ERCP catheters, etc. In these endoscopic procedures, the catheter needs to maintain patency for drainage or instrument passage, while also being flexible enough to adapt to the curvature of the body's natural cavities.

Braided reed catheters combine the high torsional control of braiding with the high flexural strength of springs, solving the clinical challenges of single-structure catheters in complex anatomical environments, such as difficulty in pushing, twisting, and easily folding. It is one of the core technologies for achieving precise, safe, and minimally invasive treatment.