IMPROVED TROCAR ENTRY INCORPORATING AN AIRBAG

摘要

A safety trocar assembly incorporating an airbag is provided to prevent
overpenetration
of the safety trocar assembly through an abdominal wall and into a body
cavity. The safety
trocar assembly includes an airbag cannula having an expandable airbag
proximal of the distal
end of the cannula. A sensing device is located at a distal end of the cannula
for detecting
changes in conditions at the distal end of the cannula. A trigger mechanism is
provided on the
cannula and operates to inflate the airbag in response to a change in
condition detected by the
sensing device.