Coupling devices for tube sets used with surgical gas delivery systems

A coupling system for connecting a dual lumen tube set to a trocar comprising:

• a) a trocar connector having no more than two coaxial flow passages formed therein including an inner flow passage defined by an inner annular wall and an outer flow passage defined between the inner annular wall and an outer annular wall;
• b) a dual lumen tube set including a first tube having a first diameter and a second tube having a second diameter that is greater than the diameter of the first tube;
• and
• c) a coupling including a generally cylindrical body having a first end portion configured to mate with the two coaxial flow passages of the trocar connector and a second end portion configured for attachment to the two tubes of the dual lumen tube set, the first end portion of the body having an inner flow passage defined by an inner annular wall for establishing fluid communication with the inner flow passage of the trocar connector and an outer flow passage defined between the inner annular wall and an outer annular wall for establishing fluid communication with the outer flow passage of the trocar connector, the second end portion of the body including first and second parallel interior recesses, wherein the first interior recess is dimensioned and configured to receive a distal end portion of the first tube of the dual lumen tube set and the second interior recess is dimensioned and configured to receive a distal end portion of the second tube of the dual lumen tube set.

A coupling system for connecting a dual lumen tube set to a trocar comprising:

• a) a trocar connector having no more than two coaxial flow passages formed therein;
• b) a dual lumen tube set including a first tube having a first diameter and a second tube having a second diameter that is greater than the diameter of the first tube;
• and
• c) a coupling including a generally cylindrical body having a first end portion configured to mate with the two coaxial flow passages of the trocar connector and a second end portion configured for attachment to the two tubes of the dual lumen tube set, the second end portion of the body including first and second parallel interior recesses off set from a central axis of the body, wherein the first interior recess is dimensioned and configured to receive a distal end portion of the first tube of the dual lumen tube set and the second interior recess is dimensioned and configured to receive a distal end portion of the second tube of the dual lumen tube set.