Patent ID: 9381312
Filing Date: 2016-07-05
CPC Classification: A61B,A61M

Claim Text:
1. A method of injecting insufflation gas into a body cavity during a medical surgical procedure to reduce unwanted upstream pressure losses and fluid instabilities that hamper the ability of the insufflation device to quickly and safely insufflate the body cavity including the steps of: extending a trocar cannula into a body cavity; flowing the insufflation gas into a trocar and the trocar cannula through a fluid stabilizer free of inline end connectors with the fluid stabilizer having in series a first smoothly contoured elongated sidewall passage to dampen the flow of insufflation gas flowing therethrough, a first plenum chamber located downstream of the first smoothly contoured elongated sidewall passage, a filter media located downstream of the first plenum chamber, a second plenum chamber located downstream of the filter media and a second smoothly contoured elongated sidewall passage to further dampen the flow of insufflation gas flowing therethrough to maintain a low fluid resistance stabilized fluid regime upstream of the trocar cannula therein; heating and hydrating the insufflation gas on the go in an annular chamber within the trocar by directing the insufflation gas through an inner cylindrical cannula member passing through the conditioning media after flowing the insufflation gas through the fluid stabilizer; and delivering a conditioned insufflation gas directly to the body cavity by flowing the conditioned insufflation gas through an annular plenum chamber in the trocar where the annular plenum chamber is located downstream of the annular chamber for heating and hydrating the fluid insufflation gas.