MINIMALLY INVASIVE SURGICAL TECHNIQUES

摘要

Apparatus and methods are described including a trocar (40) that defines a lumen therethrough configured to provide a passage through skin of a subject into a body of the subject. A cannula (60) is configured to be placed into the subject s body via the passage provided by the trocar the cannula being configured to be slidable with respect to the trocar. The cannula includes an outer tube (64) having a first expandable element (77) disposed at a distal end thereof and an inner tube (62) having a second expandable element (72) disposed at a distal end thereof the inner tube being configured to be slidable with respect to the outer tube. A vacuum port (61) applies vacuum pressure to the first expandable element via a space (65) between the inner and outer tubes of the cannula. Other applications are also described.