System for heart assist, cannula and method

• US 20110160517A1
• Filed: 12/31/2009
• Published: 06/30/2011
• Est. Priority Date: 12/31/2009
• Status: Active Grant

• Current Assignee: Cardiacassist Inc. (LivaNova Plc)
• Original Assignee: Cardiacassist Inc. (LivaNova Plc)
• Inventors: Cortese, Cory J., Wivholm, Jennifer, Garippa, Michael, Svitek, Robert G., Bollinger, Robert, Smith, Douglas E.
• Granted Patent: US 8,562,519 B2
• Time in Patent Office: Days
• US Class Current: 600/16
• CPC Class Codes: A61M 1/1698 Blood oxygenators with or without heat-exchangers intracorporal A61M1/1678; manufacturing of membranes therefor B01D67/00; semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi-permeable membranes characterised by their material B01D71/00
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3653 Interfaces between patient blood circulation and extra-corporal blood circuit
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 1/3666 Cardiac or cardiopulmonary bypass, e.g. heart-lung machines
• CPC Class Codes: A61M 1/3667 with assisted venous return
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/0008 having visible markings on its surface, i.e. visible to the naked eye, for any purpose, e.g. insertion depth markers, rotational markers or identification of type
• CPC Class Codes: A61M 2205/32 with radio-opaque indicia
• CPC Class Codes: A61M 2210/125 Heart
• CPC Class Codes: A61M 25/0041 pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• 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 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/221 the blood flow through the rotating member having both radial and axial components, e.g. mixed flow pumps
• CPC Class Codes: A61M 60/232 Centrifugal pumps
• CPC Class Codes: A61M 60/237 the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/38 Blood oxygenation
• CPC Class Codes: A61M 60/867 : using position detection during deployment, e.g. for blood pumps mounted on and driven through a catheter

Abstract

A cannula for a patient includes an elongate body having a length of at least 70 cm and a channel extending through the body defining a wall. The cannula includes a wire embodied within at least a portion of the wall. The body has a proximal end, a distal end having a tip opening through which the channel extends and a plurality of side holes through the wall in proximity to the tip for unimpeded flow of blood at the distal end. The cannula includes a barbed fitting at the proximal end. The cannula includes a suture wing for securing the elongated body to the patient. A system for assisting a patient'"'"'s heart. A method for assisting a patient'"'"'s heart.

Claims

1-9. -9. (canceled)

10. A pumping system for assisting a human patient'"'"'s heart, comprising:

a blood pump disposed outside the patient'"'"'s body;

a drainage cannula having a length to extend from the patient'"'"'s groin to the patient'"'"'s heart and in fluid communication with an inlet to the blood pump to provide blood to the blood pump; and

a blood supply cannula having a length to extend from the patient'"'"'s groin to the patient'"'"'s heart and in fluid communication with an outlet of the blood pump to provide blood to the patient'"'"'s heart, the blood supply cannula further comprising;

an elongated body defining a channel extending through the elongated body;

a wire embodied within at least a portion of the wall of the elongated body; and

the elongated body having a proximal end and a distal end having a distal tip defining a tip opening communicating with the channel, and the distal end comprising a plurality of side holes in proximity to the distal tip and communicating with the channel for unimpeded flow of blood at the distal end.

11. A pumping system as claimed in claim 10, wherein the distal end of the elongated body is curved for natural anatomical placement within the patient'"'"'s heart.

12. A pumping system as claimed in claim 10, wherein the distal end of the elongated body is curved for natural anatomical placement from the inferior vena cava into the left atrium of the patient'"'"'s heart.

13. A pumping system as claimed in claim 10, wherein at least a portion of the elongated body has insertion depth markings.

14. A pumping system as claimed in claim 10, wherein the distal tip has radiopaque markers to aid in visualization.

15. A pumping system as claimed in claim 10, further comprising a blood oxygenator between the blood supply cannula and the blood pump outlet to oxygenate the blood received from the patient'"'"'s heart into the blood pump, the blood pump supplying oxygenated blood to the patient'"'"'s heart via the blood supply cannula.

16. A pumping system as claimed in claim 10, wherein the drainage cannula has a length to extend from the patient'"'"'s groin to the patient'"'"'s right atrium, and wherein the blood supply cannula has a length to extend from the patient'"'"'s groin to at least within proximity of the patient'"'"'s pulmonary artery, whereby the patient'"'"'s right ventricle is essentially bypassed by draining the right atrium and blood is pumped by the blood pump to at least within proximity of or into the patient'"'"'s pulmonary artery thereby allowing the patient'"'"'s right ventricle to rest and establishing right ventricular support.

17. A pumping system as claimed in claim 10, wherein the distal end of the elongated body is curved for natural anatomical placement within the patient'"'"'s heart, and wherein printing on the elongated body is oriented to show that the distal tip curves to the right when the printing is at a top of the elongated body.

23. A pumping system as claimed in claim 10, wherein the distal end of the elongated body is curved for natural anatomical placement within the patient'"'"'s heart, and wherein printing on the elongated body is oriented to show that the distal tip curves to the right when the printing is at a top of the elongated body.

24. The pumping system as claimed in claim 10, wherein the transseptal cannula is further configured to cross the patient'"'"'s atrial septum to extend into the patient'"'"'s left atrium, whereby the patient'"'"'s left ventricle is essentially bypassed by draining the left atrium and blood is pumped by the blood pump into the patient'"'"'s arterial system via the arterial cannula thereby allowing the patient'"'"'s left ventricle to rest and establishing left ventricular support.

18. A pumping system for assisting a human patient'"'"'s heart, comprising:

a blood pump disposed outside the patient'"'"'s body;

a transseptal cannula having a length to extend from the patient'"'"'s groin to the patient'"'"'s heart and in fluid communication with an inlet to the blood pump to provide blood to the blood pump; and

an arterial cannula having a length to extend from the patient'"'"'s groin to the patient'"'"'s heart and in fluid communication with an outlet of the blood pump to provide blood to the patient'"'"'s heart,

wherein the transseptal cannula further comprises;

an elongated body defining a channel extending through the elongated body;

a wire embodied within at least a portion of the wall of the elongated body; and

the elongated body having a proximal end and a distal end having a distal tip defining a tip opening communicating with the channel, and the distal end comprising a plurality of side holes in proximity to the distal tip and communicating with the channel for unimpeded flow of blood at the distal end.

19. A pumping system as claimed in claim 18, wherein the distal end of the elongated body is curved for natural anatomical placement within the patient'"'"'s heart.

20. A pumping system as claimed in claim 18, wherein the distal end of the elongated body is curved for natural anatomical placement from the inferior vena cava into the left atrium of the patient'"'"'s heart.

21. A pumping system as claimed in claim 18, wherein at least a portion of the elongated body has insertion depth markings.

22. A pumping system as claimed in claim 18, wherein the distal tip has radiopaque markers to aid in visualization.

25. A method for assisting a human patient'"'"'s heart, comprising:

providing a blood pump to be disposed outside the patient'"'"'s body;

inserting a blood supply cannula into a femoral vein of the patient, the blood supply cannula having a length to extend from the patient'"'"'s groin to the patient'"'"'s heart;

moving a tip of the blood supply cannula through the patient'"'"'s vasculature and at least within proximity of the patient'"'"'s pulmonary artery;

inserting a drainage cannula into the other femoral vein of the patient, the drainage cannula having a length to extend from the patient'"'"'s groin to the patient'"'"'s heart;

moving a tip of the drainage cannula through the patient'"'"'s vasculature and to the patient'"'"'s right atrium;

connecting the drainage cannula with an inlet to the blood pump to provide blood to the blood pump; and

connecting the blood supply cannula with an outlet of the blood pump to provide blood at least within proximity of or into the patient'"'"'s pulmonary artery thereby allowing the patient'"'"'s right ventricle to rest and establishing right ventricular support.

26. A method as claimed in claim 25, further comprising pumping blood received by the blood pump from the drainage cannula to at least within proximity of or into the patient'"'"'s pulmonary artery through the blood supply cannula to provide right ventricular support.

27. A method as claimed in claim 25, further comprising placing a blood oxygenator between the blood supply cannula and the blood pump outlet to oxygenate the blood received from the patient'"'"'s heart into the blood pump, the blood pump supplying oxygenated blood to the patient'"'"'s heart via the blood supply cannula.