| 摘要 |
An adjustable length cannula (10) which may be longitudinally extended or retracted in order to accommodate a range of body cavity wall thicknesses. A method for inserting the cannula (10) is disclosed, in which a guiding cannula (260) is placed into the peritoneal cavity using the insufflation needle (250) as a guidewire, and a screw dilator (270) and cannula (10) are then placed into the peritoneal cavity using the guiding cannula as a guidewire. The guiding cannula (260) also allows visual inspection of the peritoneal cavity with an endoscope prior to insertion of the dilator (270)/cannula (10) in order to verify proper clearance.
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