Coiling Catheter
Processing Methods of Coiling Catheters
1. Material Selection
- Polymers: Common materials includePTFE, Nylon, Polyurethane, Polyethylene, and PEEK (Polyether Ether Ketone) for the catheter body.
- Metal Wires: Stainless steel or nitinol are typically used for the coiling process, providing strength and flexibility.
2. Coiling Process
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Wire Coiling:
- Equipment: Specialized coiling machines wind metal wires around a mandrel or the catheter body in a helical pattern.
- Mandrels: These are used to maintain the catheter’s internal diameter and shape during coiling.
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Extrusion:
- Over-Extrusion: A polymer layer is extruded over the coiled structure to provide a smooth surface and encapsulate the coil.
- Co-Extrusion: This involves extruding multiple layers of polymer material around the coiled wire.
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Heat Treatment:
- Annealing: Applied to metal coils to relieve internal stresses and improve flexibility.
- Sterilization: Methods such as gamma irradiation or ethylene oxide sterilization are used to ensure the catheter is sterile for medical use.
3. Quality Control
- Inspection: Visual and microscopic inspections are performed to check for defects.
- Testing: Mechanical tests (e.g., tensile strength, flexibility, kink resistance) and biocompatibility tests are carried out to ensure the catheter meets regulatory standards.
Applications of Coiling Catheters
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Cardiovascular Procedures:
- Angioplasty: Coiling catheters are used to navigate through blood vessels and deliver stents to treat blockages.
- Electrophysiology: Used in procedures like ablation to treat arrhythmias.
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Neurovascular Interventions:
- Embolization: Catheters deliver embolic agents to treat aneurysms or arteriovenous malformations.
- Thrombectomy: Removing clots from the brain in stroke patients.
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Gastrointestinal Procedures:
- Endoscopy: Coiling catheters provide flexibility and control for diagnostic and therapeutic procedures.
- Stent Placement: Used to place stents in bile ducts or other gastrointestinal pathways.
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Urological Procedures:
- Stone Retrieval: Catheters help in the retrieval of kidney stones.
- Stent Placement: To maintain ureteral patency.
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Peripheral Vascular Procedures:
- Angiography: Used for diagnostic imaging of peripheral blood vessels.
- Atherectomy: Removal of plaque from peripheral arteries.
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Oncology:
- Catheter-Based Drug Delivery: Direct delivery of chemotherapy drugs to tumors.
Why Choose Micro-tube As Your Polymer Solutions Provider?
Micro-tube specializes in extrusion tubes for various polymers.
Micro-tube’ history and reputation of partnering with manufacturers and research and development groups is long well-recognized. Today, companies – whether well-established or start-up – know that when they come to us, we deliver! Micro-tube can assist with process development, design challenges, materials guidance, prototype development, to quality support. We have our own certified testing and analytical laboratories with an extensive range of materials science capabilities. We take your reputation as seriously as you do! No other company delivers the consistency, dependability, and unparalleled innovation of Micro-tube.
Micro-tube Capabilities
>Inner diameter range: 0.0059″~0.3937″ / 0.15~10.0mm
>Outer diameter range: 0.0079″~0.4724″ / 0.20~12.00mm
>Length: Customized
>Wire coiling selection: round wire or flat wire， 0.025mm，0.038mm， 0.05mm etc.
>Accuracy: ±0.03mm
>Color: Transparent or customized
>Radiologic: Pure, BaSO4,Wi, Bi2O3