Introducer Sheath — The Safety Access Channel for Interventional Surgery

1. Core Structure

• Sheath Tube: Thin and smooth (PTFE/FEP), thin wall, large lumen
• Hemostatic Valve: Prevents blood leakage during instrument insertion
• Side Port: For flushing, drug administration and pressure monitoring

2. Working Principle

The sheath establishes a sealed channel for catheters, balloons and stents.

3. Common Sizes

4Fr–24Fr depending on procedure type.