Patent ID: 11918725
Assignee: CARDIACASSIST, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. 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 a first group of drainage apertures longitudinally spaced apart distally from a second group 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 drainage tube includes a reinforcing coil extending along a length thereof and the infusion tube includes a reinforcing coil extending along a length thereof;
wherein the reinforcing coil of the drainage tube surrounds the reinforcing coil of the infusion tube.