Dilatationssystem

摘要

A guiding sleeve (2) with a grip (8) accommodating a trocar (4) and an optical shaft (6) inside the trocar (4) is guided through the opening into the body of the patient. The trocar (4) and the shaft (6) are pulled back and the sleeve (2) left in order to retain the opening. A dilatation device with a conical segment adjacent to the tip is inserted into the sleeve (2) which is widened until it breaks apart along a perforated line (10) in order to be removed and disposed of. A trocar (4) of a bigger size can now be easily inserted.