Dual Lumen Cannula with Expandable Lumen
AssigneeCardiacAssist, Inc.
InventorKelli Edwards
Life of this patent
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Abstract
A dual lumen drainage cannula configured for use in a VA ECMO system includes a first drainage tube having a proximal end, a distal end, and at least one aperture in at least one wall of the first drainage tube proximate to the distal end of the first drainage tube, and a second drainage tube having a proximal end, a distal end, and at least one aperture in at least one wall of the second drainage tube proximate to the distal end of the second drainage tube. The first drainage tube passes through the second drainage tube. The dual lumen drainage cannula also includes a sleeve positioned adjacent to an interior wall of the second drainage tube. The sleeve is formed of a flexible material so as to be expandable and collapsible within the second drainage tube.
Claims20
A dual lumen drainage cannula configured for use in a veno-arterial extracorporeal membrane oxygenation (VA ECMO) system, the dual lumen drainage cannula comprising:
- a first drainage tube having a proximal end, a distal end, and at least one aperture defined in at least one wall of the first drainage tube proximate to the distal end of the first drainage tube;
- a second drainage tube having a proximal end, a distal end, and at least one aperture defined in at least one wall of the second drainage tube proximate to the distal end of the second drainage tube, wherein the first drainage tube passes through the second drainage tube, and wherein the distal end of the second drainage tube is coupled to a portion of the first drainage tube between the proximal end and the distal end of the first drainage tube;
- and
- a sleeve positioned adjacent to an interior wall of the second drainage tube, wherein at least one wall of the sleeve is formed of a flexible material so as to be expandable and collapsible within the second drainage tube.
A veno-arterial extracorporeal membrane oxygenation (VA ECMO) system comprising:
- a dual lumen drainage cannula comprising:
- a first drainage tube having a proximal end, a distal end, and at least one aperture defined in at least one wall of the first drainage tube proximate to the distal end of the first drainage tube,
- a second drainage tube having a proximal end, a distal end, and at least one aperture defined in at least one wall of the second drainage tube proximate to the distal end of the second drainage tube, wherein the first drainage tube passes through the second drainage tube, and wherein the distal end of the second drainage tube is coupled to a portion of the first drainage tube between the proximal end and the distal end of the first drainage tube, and
- a sleeve positioned adjacent to an interior wall of the second drainage tube, wherein at least one wall of the sleeve is formed of a flexible material so as to be expandable and collapsible within the second drainage tube;
- a blood pump having an inlet connected to an outlet of the dual lumen drainage cannula;
- an oxygenator connected to an outlet of the blood pump;
- and
- an infusion cannula connected to an outlet of the oxygenator and configured for insertion into the vasculature of a patient.
A method of providing veno-arterial extracorporeal membrane oxygenation (VA ECMO) of a heart, the method comprising:
- providing a dual lumen drainage cannula comprising:
- a first drainage tube having a proximal end, a distal end, and at least one aperture defined in at least one wall of the first drainage tube proximate to the distal end of the first drainage tube,
- a second drainage tube having a proximal end, a distal end, and at least one aperture defined in at least one wall of the second drainage tube proximate to the distal end of the second drainage tube, wherein the first drainage tube passes through the second drainage tube, and wherein the distal end of the second drainage tube is coupled to a portion of the first drainage tube between the proximal end and the distal end of the first drainage tube, and
- a sleeve positioned adjacent to an interior wall of the second drainage tube, wherein at least one wall of the sleeve is formed of a flexible material so as to be expandable and collapsible within the second drainage tube;
- inserting the dual lumen drainage cannula into a first site in a patient's vasculature;
- maneuvering the dual lumen drainage cannula through the patient's vasculature such that the distal end of the first drainage tube is at least within proximity of the patient's pulmonary artery and such that the distal end of the second drainage tube is at least within proximity of the patient's right atrium;
- draining blood through the first drainage tube and the second drainage tube to a blood pump;
- pumping drained blood through an oxygenator to reduce carbon dioxide content of the blood;
- and
- delivering oxygenated blood with reduced carbon dioxide content to a second site in the patient's vasculature.
Dependencies are inferred from the claim text.