Surgical instrument with sliding actuating member - has annular grommets sealed to member and enclosing tube at inner and outer edges at forward and rear ends

摘要

The annular gap between the member and the tube is sealed. This is done by annular grommets (40,45) at the forward and rear ends of the tube, and which are sealed by their outer edges to the tube and by their inner ones to the member. They can typically consist of cone-shaped folding bellows, and can be secured by nuts (39,44;42,46) to the tube and member. They may have a dirt-repellent coating on the outside, and the tube can be at least partly transparent. ADVANTAGE - Simple to clean and keep sterile.