US 11,918,725 B2
Dual lumen cannula
Patrick A. Kelly, North Huntingdon, PA (US); Patrick E. Lutz, Pittsburgh, PA (US); Robert G. Svitek, Freeport, PA (US); and Jerry Stokes, Sarver, PA (US)
Assigned to CardiacAssist, Inc., Pittsburgh, PA (US)
Filed by CardiacAssist, Inc., Pittsburgh, PA (US)
Filed on Nov. 3, 2021, as Appl. No. 17/518,224.
Application 17/518,224 is a continuation of application No. 16/404,317, filed on May 6, 2019, granted, now 11,179,510.
Application 16/404,317 is a continuation of application No. 15/720,005, filed on Sep. 29, 2017, granted, now 10,279,101, issued on May 7, 2019.
Application 15/720,005 is a continuation of application No. 14/869,506, filed on Sep. 29, 2015, granted, now 9,782,534, issued on Oct. 10, 2017.
Application 14/869,506 is a continuation of application No. 13/718,110, filed on Dec. 18, 2012, granted, now 9,168,352, issued on Oct. 27, 2015.
Claims priority of provisional application 61/577,257, filed on Dec. 19, 2011.
Prior Publication US 2022/0054730 A1, Feb. 24, 2022
Int. Cl. A61M 1/36 (2006.01); A61M 25/00 (2006.01); A61M 60/13 (2021.01); A61M 60/165 (2021.01); A61M 60/38 (2021.01); A61M 60/859 (2021.01); A61M 60/113 (2021.01)
CPC A61M 1/3659 (2014.02) [A61M 25/0026 (2013.01); A61M 25/0029 (2013.01); A61M 25/007 (2013.01); A61M 60/13 (2021.01); A61M 60/165 (2021.01); A61M 60/38 (2021.01); A61M 60/859 (2021.01); A61M 2025/0031 (2013.01); A61M 2025/0039 (2013.01); A61M 25/005 (2013.01); A61M 60/113 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A dual lumen cannula comprising:
a drainage tube having a proximal end, a distal end, and a lumen extending therethrough;
an infusion tube coaxially aligned within the lumen of the drainage tube, the infusion tube having a proximal end, a distal end, and a lumen extending therethrough;
wherein the infusion tube includes a distal end region extending distally beyond the distal end of the drainage tube to the distal end of the infusion tube;
a plurality of drainage apertures extending through a sidewall of the drainage tube proximal of the distal end of the drainage tube, the plurality of drainage apertures including ag first group of drainage apertures longitudinally spaced apart distally from a second group of drainage apertures by a segment of the drainage tube without any drainage apertures, wherein a length of the segment of the drainage tube without any drainage apertures is greater than a distance between adjacent drainage apertures of the first group and/or the second group of drainage apertures;
a plurality of infusion apertures extending through a sidewall of the infusion tube adjacent the distal end of the infusion tube, wherein a distal end region of the infusion tube has a tapered section extending distally beyond a distal-most aperture of the plurality of infusion apertures and to the distal end of the infusion tube; and
a connector provided at the proximal end of the infusion tube and the proximal end of the drainage tube, the connector including an inlet portion defining an infusion fluid pathway in fluid communication with the lumen of the infusion tube and an outlet portion defining a drainage fluid pathway in fluid communication with the lumen of the drainage tube;
wherein the infusion fluid pathway and the drainage fluid pathway transition from a coaxial arrangement at a distal end of the connector to an axially offset arrangement at a proximal end of the connector.