Apparatus and methods for entering cavities of the body

• US 20040158206A1
• Filed: 01/26/2004
• Published: 08/12/2004
• Est. Priority Date: 07/11/1997
• Status: Active Grant

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: A-Med Systems, Inc.
• Inventors: McCrystle, Kelly J., Zieglier, Roland W., Kanz, William R., Aboul-Hosn, Walid N., Castor, Rosalind, deDios, Allan
• Granted Patent: US 7,090,659 B2
• Time in Patent Office: Days
• US Class Current: 604/158
• CPC Class Codes: A61B 2017/00243 cardiac
• 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 25/0043 characterised by structural features
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/0075 Valve means

Abstract

Systems and methods for providing cardiac support provide a cannula body having an inlet and an outlet. The cannula includes a preformed bend sized and configured to extend within the heart chamber between the inlet and the outlet. The cannula is inserted through a first valve into a heart chamber and through a second valve out of the heart chamber. Blood is drawn into the cannula through the inlet and discharged from the cannula through the outlet, thereby bypassing the heart chamber.

Claims

1. A method of providing cardiac support comprising

providing a cannula body having an inlet and an outlet,

inserting the cannula through a first valve into a heart chamber in an antegrade flow direction and through a second valve out of the heart chamber in an antegrade flow direction,

drawing blood into the cannula through the inlet upstream of the first valve, and

discharging blood from the cannula through the outlet downstream of the second valve, thereby bypassing the heart chamber,

wherein the cannula includes a preformed bend sized and configured to extend within the heart chamber between the inlet and the outlet.

2. A method according to claim 1

wherein the chamber is a right ventricle,

wherein the first valve is a tricuspid valve, and

wherein the second valve is a pulmonary valve.

3. A method of providing cardiac support comprising

providing a cannula body having an inlet and an outlet,

inserting the cannula through a first valve into a heart chamber in a retrograde flow direction and through a second valve out of the heart chamber in a retrograde flow direction,

drawing blood into the cannula through the inlet upstream of the second valve, and

discharging blood from the cannula through the outlet downstream of the first valve, thereby bypassing the heart chamber,

wherein the cannula includes a preformed bend sized and configured to extend within the heart chamber between the inlet and the outlet.

4. A method according to claim 3

wherein the heart chamber is a left ventricle,

wherein the first valve is an aortic valve, and

wherein the second valve is a mitral valve.