US 11,813,411 B2
Dual lumen cannula with adjustable length infusion tube
Patrick A. Kelly, North Huntingdon, PA (US); Jerry Stokes, Sarver, PA (US); and Robert G Svitek, Freeport, PA (US)
Assigned to CardiacAssist, Inc., Pittsburgh, PA (US)
Filed by CardiacAssist, Inc., Pittsburgh, PA (US)
Filed on Jun. 30, 2020, as Appl. No. 16/917,253.
Prior Publication US 2021/0402138 A1, Dec. 30, 2021
Int. Cl. A61M 1/36 (2006.01); A61M 25/00 (2006.01); A61M 60/00 (2021.01); A61M 39/10 (2006.01)
CPC A61M 25/0026 (2013.01) [A61M 1/3659 (2014.02); A61M 25/007 (2013.01); A61M 39/105 (2013.01); A61M 60/00 (2021.01); A61M 2025/0031 (2013.01); A61M 2025/0039 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A dual lumen coaxial cannula assembly comprising:
a first infusion tube having a first elongate body defining a first lumen therethrough, the first infusion tube having a proximal end, a distal end, and a sidewall extending circumferentially therebetween;
a second drainage tube co-axially aligned with the first infusion tube and having a second elongate body with a second lumen defined by a space between the first infusion tube and second drainage tube, the second drainage tube having a proximal end, a distal end, and a sidewall extending circumferentially therebetween; and
a connector assembly, wherein the connector assembly comprises an inlet portion through which the first infusion tube is configured to extend, an outlet portion in fluid communication with the second drainage tube, and a common lumen portion in fluid communication with and extending distally from the inlet portion and the outlet portion, the common lumen being coupled to the second drainage tube and through which the first infusion tube is configured to extend into the second drainage tube, wherein the connector assembly is configured to enable selective axial displacement of the first infusion tube through the second drainage tube;
wherein the inlet portion is noncoaxial with the common lumen portion.