Methods and devices for maintaining cardiopulmonary bypass and arresting a patient's heart
AssigneeHeartport, Inc.
InventorsCraig P. Roberts, John M. Toomasian, Sylvia W. Fan
Life of this patent
Estimating the term…
Abstract
An endovascular system for arresting a patient's heart and maintaining the patient on cardiopulmonary bypass. A venous cannula, venting catheter and an aortic occlusion device are all coupled together so that the blood drawn into each of these catheters may be fed to a pump. A manifold has valves which control flows through the venous cannula, venting catheter and aortic occlusion device. A blood storage element is also provided so that the amount of blood in the perfusion circuit may be varied if necessary. The blood storage element is preferably positioned in parallel with the pump so that the pump may be used to add and remove blood to and from the blood storage element.
Claims14
A method of withdrawing blood from a patient for use with a cardiopulmonary bypass system, comprising the steps of:
- providing a venous cannula and a venting catheter, the venous cannula having a lumen and at least one opening in fluid communication with the lumen, the venting catheter also having a venting lumen with at least one opening in fluid communication with the venting lumen;
- inserting the venous cannula into a vein of a patient;
- passing the venting catheter through the patient's tricuspid and pulmonary valves;
- coupling the venous catheter and the venous cannula to a pump;
- and
- withdrawing blood from the patient through the lumen of the venous cannula and the venting lumen of the venting catheter using the pump.
A method of withdrawing and returning blood to a patient supported by a cardiopulmonary bypass system, comprising the steps of:
- passing a first lumen and a second lumen through an opening in a patient's artery, the first lumen having an occluding member mounted thereto, the occluding member being movable between a collapsed condition and an expanded condition;
- inserting a venous cannula into a vein of the patient;
- coupling the venous cannula to a venous line;
- withdrawing blood from the patient through the venous cannula and the venous line;
- returning the blood to the patient through an arterial line coupled to the second lumen;
- positioning the occluding member in the patient's ascending aorta;
- expanding the occluding member to occlude the patient's ascending aorta;
- delivering cardioplegic fluid through the first lumen to thereby arrest the patient's heart;
- providing a venting catheter;
- passing the venting catheter through the patient's tricuspid and pulmonary valves;
- withdrawing blood from the patient using the venting catheter;
- providing a blood storage element having an inlet and an outlet;
- fluidly coupling the inlet of the blood storage element to the arterial line;
- and
- selectively changing a volume of blood in the blood storage element.
A method of arresting a patient's heart and maintaining bypass support, comprising the steps of:
- inserting a venous cannula into a vein of a patient;
- coupling the venous cannula to an inlet of a pump, the pump having an outlet;
- withdrawing blood from the patient through the venous cannula using the pump;
- fluidly coupling the outlet of the pump to an arterial cannula through an arterial line;
- returning blood to the patient through the arterial cannula;
- inserting an aortic occlusion device through an artery of the patient, the aortic occlusion device having an occluding member;
- expanding the occluding member in the patient's ascending aorta thereby occluding the ascending aorta;
- delivering cardioplegic fluid to the ascending aorta through a lumen in the aortic occlusion device;
- and
- coupling the lumen of the aortic occlusion device to the pump intake.
Dependencies are inferred from the claim text.