Cannula system for a biventricular cardiac support system or a cardiopulmonary bypass system

• US 5,785,686 A
• Filed: 07/15/1997
• Issued: 07/28/1998
• Est. Priority Date: 05/02/1996
• Status: Expired due to Fees

• Current Assignee: Thomas M. Runge
• Original Assignee: Thomas M. Runge
• Inventors: Runge, Thomas M.
• Primary Examiner(s): McDermott, Corrine M.
• Assistant Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US08/892,910
• Time in Patent Office: 378 Days
• Field of Search: 604/96, 604/102, 604/43, 604/45, 604/53, 604/264, 604/280, 604/4, 604/8, 604/48, 606/194
• US Class Current: 604/96.01
• 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 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2202/0472 cryo-cardioplegic
• CPC Class Codes: A61M 2210/127 Aorta
• CPC Class Codes: A61M 25/0021 characterised by the form of the tubing A61M25/0054 takes precedence
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 60/117 for assisting the heart, e.g. transcutaneous or external ventricular assist devices
• CPC Class Codes: A61M 60/562 for making blood flow pulsatile in blood pumps that do not intrinsically create pulsatile flow
• CPC Class Codes: A61M 60/851 Valves
• CPC Class Codes: A61M 60/892 Active valves, i.e. actuated by an external force

Abstract

A cannula system for a biventricular cardiac support system or a cardiopulmonary bypass system wherein a first cannula having a pair of side-by-side lumens is adapted to be positioned within the left atrium and left ventricle and aorta of a patient. Blood from the left atrium and left ventricle drains into one of the lumens in the first cannula and is conveyed to the inlet of a pulsatile flow cardiopulmonary bypass pump from where it is pumped through the other lumen into the aorta of the patient. An inflatable balloon is provided at the distal end of the first cannula for holding the distal end of the cannula in the aorta above the aortic valve. The first cannula includes an axially extending bore communicating with a space in the aorta between the inflated balloon and the aortic valve for conveying cardioplegic solution to the space communicating with the left and right arteries of the patient. A second cannula having a pair of side-by-side lumens is adapted to be positioned within the right atrium and right ventricle and pulmonary artery of the patient. Blood from the right atrium and right ventricle flows into one of the lumens in the second cannula and is conveyed to the pulsatile flow cardiopulmonary bypass pump from where it is pumped through the other lumen into the pulmonary artery of the patient.

Claims

1. A cannula for use in a biventricular cardiac support system or a cardiopulmonary bypass system comprising an elongated tube having a side wall and a proximate end and a distal end, a transverse, axially extending wall having a distal end, mounted within said tube for dividing the tube into a pair of side-by-side lumens, tile distal end of the transverse wall merging with the side wall of the tube substantially intermediate the ends thereof, to thereby terminate and close the distal end of one of said pair of lumens, a plurality of aspiration orifices in the side wall of tube communicating with said one of said pair of lumen, the other lumen of said pair of lumens extending the full length of said tube, a large end orifice at the distal end of said other lumen, a plurality of smaller orifices in the side wall of the tube communicating with said other lumen adjacent the distal end thereof, an inflatable balloon connected to the distal end of said other lumen, said balloon being positioned below and adjacent to said plurality of smaller orifices, and an axially extending inflation bore provided in the side wall of the tube communicating with the interior of the balloon.

2. A cannula according to claim 1, wherein a second axially extending bore is provided in the side wall of the tube for conveying an oxygenated cardioplegic solution to the exterior of the tube at a location below and exteriorly of the balloon.