Device for accessing a body cavity

摘要

This application relates to devices for providing access to a body cavity without substantial loss of inflation gas therein. The device comprises an access assembly (10) that may have a tubular member (12), at least one sleeve (16) coaxially disposed over the tubular member (12), a pneumostasis valve (13) attached to the tubular member (12), and an obturator (11) removably received in the tubular member (12). the sleeve has a distal expandable region (19).