US 11,896,262 B2
Method and system for gas maintenance to a body cavity using a trocar
Carl M. Geisz, Edina, MN (US)
Assigned to LEXION MEDICAL, LLC, St. Paul, MN (US)
Filed by Lexion Medical, LLC, St. Paul, MN (US)
Filed on Sep. 1, 2020, as Appl. No. 17/009,271.
Application 17/009,271 is a continuation of application No. 16/271,072, filed on Feb. 8, 2019, granted, now 10,799,266.
Application 16/271,072 is a continuation in part of application No. 14/792,873, filed on Jul. 7, 2015, granted, now 10,238,421, issued on Mar. 26, 2019.
Prior Publication US 2020/0397468 A1, Dec. 24, 2020
Int. Cl. A61B 17/34 (2006.01); A61M 16/10 (2006.01); A61M 13/00 (2006.01)
CPC A61B 17/3421 (2013.01) [A61B 17/3474 (2013.01); A61B 17/3417 (2013.01); A61B 2218/008 (2013.01); A61M 13/003 (2013.01); A61M 13/006 (2014.02); A61M 16/105 (2013.01); A61M 2205/3344 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method comprising:
positioning a distal portion of a trocar into a patient cavity, the trocar comprising:
an outer tubular member disposed about an inner tubular member;
a first gas tubing connection fluidly connected to a lumen of the inner tubular member;
a second gas tubing connection fluidly connected to a lumen of the outer tubular member; and
a vacuum break comprising a flapper valve;
wherein:
the inner tubular member is formed with an opening at the distal portion and an opening at a proximal portion of the trocar, the openings being adapted to provide access to the patient cavity, wherein the inner tubular member further comprises a seal to deter the escape of gasses through a proximal portion of the inner tubular member;
the inner tubular member is separated from the outer tubular member by an inner wall;
the vacuum break is fluidly connected to the second gas tubing connection;
supplying an insufflation gas to the patient cavity through the inner tubular member via the first gas tubing connection; and
removing smoke from the patient cavity through the outer tubular member via the second gas tubing connection, wherein a vacuum source is coupled to the second gas tubing connection.