Dual Lumen Cannula

• US 20160082176A1
• Filed: 09/29/2015
• Published: 03/24/2016
• Est. Priority Date: 12/19/2011
• Status: Active Grant

• Current Assignee: Cardiacassist Inc. (LivaNova Plc)
• Original Assignee: Cardiacassist Inc. (LivaNova Plc)
• Inventors: Kelly, Patrick A., Lutz, Patrick E., Svitek, Robert G., Stokes, Jerry
• Granted Patent: US 9,782,534 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0039 characterized by lumina being arranged coaxially
• CPC Class Codes: A61M 25/0026 Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/13 by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
• CPC Class Codes: A61M 60/165 implantable in, on, or around the heart
• CPC Class Codes: A61M 60/38 Blood oxygenation
• CPC Class Codes: A61M 60/859 Connections therefor

Abstract

A dual lumen coaxial cannula assembly includes a first infusion tube having a first elongate body defining a first lumen therethrough and 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. A connector is removably attached to the first infusion tube and the second drainage tube for coupling the dual lumen coaxial cannula to an extracorporeal blood circuit. The first infusion tube and the second drainage tube include a plurality of infusion and drainage apertures, respectively, provided at the distal end and extending through the sidewall of the first infusion tube and the drainage tube, respectively.

Claims

1-18. -18. (canceled)

19. A dual lumen cannula comprising:

a first infusion tube having a first elongate body defining a first lumen therethrough, the first infusion tube having a first proximal end, a first distal end, and a first sidewall extending circumferentially therebetween;

a second drainage tube aligned with the first infusion tube and having a second elongate body with a second lumen, the second drainage tube having a second proximal end, a second distal end, and a second sidewall extending circumferentially therebetween;

a plurality of infusion apertures extending through the first sidewall of the first infusion tube; and

a plurality of drainage apertures extending through the second sidewall of the second drainage tube,

wherein a total cross-sectional area of the plurality of infusion apertures is equal to or greater than the cross-sectional area of the first lumen, and

wherein the total cross-sectional area of the plurality of drainage apertures is equal to or greater than the cross-sectional area of the second lumen.

20. The dual lumen cannula of claim 19, wherein the second drainage tube is coaxially aligned with the first infusion tube.

21. The dual lumen cannula of claim 19, wherein the plurality of infusion apertures is provided at the first distal end of the first infusion tube.

22. The dual lumen cannula of claim 19, wherein the plurality of drainage apertures is provided at the second distal end of the second drainage tube.

23. The dual lumen cannula of claim 19, wherein the plurality of infusion apertures extends through the first sidewall of the first infusion tube in a direction perpendicular to a longitudinal axis of the first infusion tube.

24. The dual lumen cannula of claim 19, wherein the plurality of drainage apertures extends through the second sidewall of the second drainage tube in a direction perpendicular to a longitudinal axis of the second drainage tube.

25. The dual lumen cannula of claim 19, wherein the plurality of infusion apertures extends through the first sidewall of the first infusion tube at an acute or obtuse angle with respect to a longitudinal axis of the first infusion tube.

26. The dual lumen cannula of claim 19, wherein the plurality of drainage apertures extends through the second sidewall of the second drainage tube at an acute or obtuse angle with respect to a longitudinal axis of the second drainage tube.

27. The dual lumen cannula of claim 19, further comprising a reinforcing coil that extends from the proximal end to the distal end of one or both of the first infusion tube and the second drainage tube.

28. The dual lumen cannula of claim 19, wherein the dual lumen cannula is adapted for inserting into an internal jugular vein of a patient.

29. The dual lumen cannula of claim 19, wherein the dual lumen cannula is adapted for maneuvering through the patient'"'"'s vasculature such that the first distal end of the first infusion tube is substantially within the patient'"'"'s pulmonary artery and such that the second distal end of the second drainage tube is substantially within the patient'"'"'s right atrium.

30. The dual lumen cannula of claim 19, wherein at least one of the plurality of infusion apertures and the plurality of drainage apertures extends in a circular pattern.

31. The dual lumen cannula of claim 19, wherein the plurality of infusion apertures is separated from the plurality of drainage apertures by a predetermined distance along a longitudinal axis of the first infusion tube, and wherein the predetermined distance is selected based on at least one of patient age, patient size, and desired flow rate.

32. The dual lumen cannula of claim 19, wherein a tapered portion of an internal portion of the first infusion tube extends distally beyond a circumferentially-disposed infusion aperture that is positioned closest to the first distal end of the first infusion tube.

33. A dual lumen cannula comprising:

a first infusion tube having a first elongate body defining a first lumen therethrough, the first infusion tube having a first proximal end, a first distal end, and a first sidewall extending circumferentially therebetween;

a second drainage tube aligned with the first infusion tube and having a second elongate body with a second lumen, the second drainage tube having a second proximal end, a second distal end, and a second sidewall extending circumferentially therebetween;

a plurality of infusion apertures extending through the first sidewall of the first infusion tube;

a plurality of drainage apertures extending through the second sidewall of the second drainage tube;

a connector;

a first connector portion provided at the first proximal end of the first infusion tube for coupling the first infusion tube to the connector;

a second connector portion provided at the second proximal end of the second drainage tube for coupling the second drainage tube to the connector,

wherein the first connector portion and the second connector portion are removably connected to the connector for coupling the first infusion tube and the second drainage tube to an extracorporeal blood circuit,

wherein a total cross-sectional area of the plurality of infusion apertures is equal to or greater than the cross-sectional area of the first lumen, and

wherein the total cross-sectional area of the plurality of drainage apertures is equal to or greater than the cross-sectional area of the second lumen.

34. The dual lumen cannula of claim 33, wherein the second drainage tube is coaxially aligned with the first infusion tube.

35. The dual lumen cannula of claim 33, wherein the plurality of infusion apertures is provided at the first distal end of the first infusion tube.

36. The dual lumen cannula of claim 33, wherein the plurality of drainage apertures is provided at the second distal end of the second drainage tube.

37. The dual lumen cannula of claim 33, wherein the plurality of infusion apertures extends through the first sidewall of the first infusion tube in a direction perpendicular to a longitudinal axis of the first infusion tube.

38. The dual lumen cannula of claim 33, wherein the plurality of drainage apertures extends through the second sidewall of the second drainage tube in a direction perpendicular to a longitudinal axis of the second drainage tube.

39. The dual lumen cannula of claim 33, wherein the plurality of infusion apertures extends through the first sidewall of the first infusion tube at an acute or obtuse angle with respect to a longitudinal axis of the first infusion tube.

40. The dual lumen cannula of claim 33, wherein the plurality of drainage apertures extends through the second sidewall of the second drainage tube at an acute or obtuse angle with respect to a longitudinal axis of the second drainage tube.

41. The dual lumen cannula of claim 33, further comprising a reinforcing coil that extends from the proximal end to the distal end of one or both of the first infusion tube and the second drainage tube.

42. The dual lumen cannula of claim 33, wherein the dual lumen cannula is adapted for inserting into an internal jugular vein of a patient.

43. The dual lumen cannula of claim 33, wherein the dual lumen cannula is adapted for maneuvering through the patient'"'"'s vasculature such that the first distal end of the first infusion tube is substantially within the patient'"'"'s pulmonary artery and such that the second distal end of the second drainage tube is substantially within the patient'"'"'s right atrium.

44. The dual lumen cannula of claim 33, wherein at least one of the plurality of infusion apertures and the plurality of drainage apertures extends in a circular pattern.

45. The dual lumen cannula of claim 33, wherein the plurality of infusion apertures is separated from the plurality of drainage apertures by a predetermined distance along a longitudinal axis of the first infusion tube, and wherein the predetermined distance is selected based on at least one of patient age, patient size, and desired flow rate.

46. The dual lumen cannula of claim 33, wherein a tapered portion of an internal portion of the first infusion tube extends distally beyond a circumferentially-disposed infusion aperture that is positioned closest to the first distal end of the first infusion tube.

47. The dual lumen cannula of claim 33, wherein the connector further comprises a distal aperture in fluid communication with an inlet portion and an outlet portion, and a barbed fitting on the inlet portion and the outlet portion for connecting an infusion line and a drainage line to the connector.

48. A method of assisting a patient'"'"'s heart, comprising the steps of:

providing a dual lumen cannula comprising;

a first infusion tube having a first elongate body defining a first lumen therethrough, the first infusion tube having a first proximal end, a first distal end, and a first sidewall extending circumferentially therebetween;

a second drainage tube aligned with the first infusion tube and having a second elongate body with a second lumen, the second drainage tube having a second proximal end, a second distal end, and a second sidewall extending circumferentially therebetween;

a plurality of infusion apertures in the first sidewall of the first infusion tube;

a plurality of drainage apertures in the second sidewall of the second drainage tube;

a connector;

a first connector portion provided at the proximal end of the first infusion tube for coupling the first infusion tube to the connector;

a second connector portion provided at the proximal end of the second drainage tube for coupling the second drainage tube to the connector,

wherein the first connector portion and the second connector portion are removably connected to the connector for coupling the first infusion tube and the second drainage tube to an extracorporeal blood circuit,

wherein a total cross-sectional area of the plurality of infusion apertures is equal to or greater than the cross-sectional area of the first lumen, and

wherein the total cross-sectional area of the plurality of drainage apertures is equal to or greater than the cross-sectional area of the second lumen;

inserting the dual lumen cannula into an internal jugular vein of the patient, the dual lumen cannula having a length to extend from the patient'"'"'s neck area to the patient'"'"'s heart;

maneuvering the dual lumen cannula through the patient'"'"'s vasculature such that the first distal end of the first infusion tube is substantially within the patient'"'"'s pulmonary artery and such that the second distal end of the second drainage tube is substantially within the patient'"'"'s right atrium; and

connecting the connector to a blood pump for establishing right ventricular support.

49. The method of claim 48, wherein blood from the blood pump is delivered to the patient'"'"'s pulmonary artery through the plurality of infusion apertures in the first infusion tube.

50. The method of claim 48, wherein blood is withdrawn from the patient'"'"'s right atrium through the plurality of drainage apertures in the second drainage tube.