• Ultra-smooth inner surface ensures smooth passage of instruments and reduces friction loss

• Excellent circumferential flexibility and axial support strength, meets the rigidity requirements of complex anatomical pathways

• Precise and consistent pipe diameter and tolerance control, excellent instrument compatibility and sealing protection

FAQs:

Q: How is the inner surface of the protective outer tube treated? Can it ensure that there will be no jamming or scratching when guiding the endoscope or instruments?

A: Absolutely. We employ a high-precision inner wall mirror polishing process, controlling the inner wall roughness to an extremely low level (typically Ra < 0.4μm), combined with the low friction coefficient of the material itself, forming a "zero-resistance" smooth lumen. This design minimizes the friction when instruments are inserted, allowing endoscopes, guidewires, catheters, and other instruments to pass through smoothly and without obstruction. It also effectively prevents scratches or wear on the instrument surface, thereby protecting the integrity and functional precision of expensive instruments.

Q: During procedures such as ERCP (Endoscopic Retrograde Cholangiopancreatography) or bronchoscopy, is the support strength of the outer tube sufficient? Will it collapse when bent?

A: For complex interventional surgeries requiring high support strength, such as these, our protective outer tube adopts a special composite structural design. The outer layer has excellent resistance to radial compression, ensuring that it maintains a circular channel even when bent​ (e.g., conforming to the physiological curvature of the common bile duct or main bronchus), without collapsing or flattening. This "combination of rigidity and flexibility"​ allows the outer tube to act as a stable channel to protect the endoscope from external compression​ while conforming to the winding path within the body for smooth advancement, providing a reliable channel guarantee for surgical instruments.