Injection cannula

accesssuctionvascular access

Overview
Nordson MEDICAL is the world's leading contract manufacturer of cardiopulmonary vascular cannulae, catheters, and specialized medical tubing for a wide range of clinical applications. Avalon Laboratories polymer solution casting technology enables design and manufacture of custom tubing with features not achievable by conventional extrusion or injection molding, providing single-piece constructions with complex geometries at reduced cost.

Polymer Solution Casting - Key Benefits
Applying liquid polymers in layers allows combination of materials with different properties into a single device (strength, lubricity, flexibility). The process supports varying wall thicknesses and diameters along the device length in a single-piece construction while maintaining tight tolerances. It enables embedded reinforcement for flexibility, kink resistance, and maneuverability, resulting in thin walls, high flow, and superior column strength for enhanced performance.

Applications of Polymer Solution Cast Cannulae

• Bariatrics/Obesity: Cannulae used for gastrointestinal access, suction, or delivery of obesity therapies.
• Extracorporeal Life Support: Cannulae used to transport blood in and out of the body to oxygenate or remove carbon dioxide during surgical procedures and for patient support. Typical uses include:
  • Bypass surgeries
  • Heart or lung support
  • Ventricular assist device (VAD) therapies
• Peripheral Vascular Access/Stent Delivery: Components for access and stent delivery enabled by polymer solution casting.

Enhanced Performance
The technique achieves smooth, continuous diameter transitions and enables embedded component variety. It supports changes in diameter, wall thickness, or material properties along the length and produces devices with high flow and superior column strength.

Extensive Custom Capabilities

• Single- or multilumen tubing
• Coaxial tubing
• Complex geometric designs
• Tapered designs
• Bump tubing
• Bending/shaping/forming
• Wide range of diameters and durometers
• Embedded reinforcement options

Compare Our Construction (Polymer Solution Casting vs Tri-layer Solutions)
Header: | Polymer Solution Casting | Tri-layer Solutions
Target Applications: | High Complexity; High Mix/Low Volume | Moderate Complexity; Low Mix/High Volume
Up-Front Cost: | Minimal | Higher
Scalability: | Scale as needed | Limited access to low volume runs for custom extrusion
Construction: | Single piece; No bond or butt joints; No delamination | Inner layer, tie layer; Requires bonding between layers; Material variation along length requires butt joints or stepped diameter
Strengths: | Changes in diameter, wall thickness or material properties along the length; Smooth, continuous diameter transitions; Embedded component variety | Long lengths of identical, concentric tubing walls; Long lengths of identical, die-cut multi-lumen profiles; Lower cost for volume runs
Challenges: | Wall uniformity (thin layers conform to geometry of embedded components); Discrete process | Tapered diameters; Changes in wall thickness along the length; Smooth changes in material properties along the length; Embedding complex features; Ultra-thin layers

Pebax® Coatings
A manufacturing approach to apply Pebax® coatings on catheters and finished devices enables seamless tapers along the full length of a catheter and eliminates fuse or glue joints, permitting design options that allow continuous tapers and improved flexibility.

Delamination / Bonding
Polymer solution casting can encapsulate embedded components between PTFE liners and outer jackets, reducing delamination failures compared to some bonding techniques.

caractéristiques / spécifications techniques

• Single-piece construction without bonds or butt joints
• Ability to create single- or multi-lumen and coaxial tubing
• Support for complex geometric and tapered designs
• Capability for bump tubing and formed/bent shapes
• Wide range of diameters and durometers
• Embedded reinforcement options for flexibility and kink resistance
• Thin walls for high flow and superior column strength
• Combines materials (strength, lubricity, flexibility) in layered liquid polymer construction
• Tight tolerances for smooth continuous diameter transitions
• Suitable for high-complexity, high-mix/low-volume applications