Sean D. Plunkett - Mission Viejo CA Henry W. Palermo - Burbank CA
Assignee:
Medtronic, Inc. - Brooklyn Park MN
International Classification:
A61M 3700
US Classification:
604 611, 604 401, 604507, 623 316, 623 326
Abstract:
Pulsatile blood flow in a heart-lung machine is accomplished by pumping blood into a bladder at a constant rate, and cyclically emptying the bladder into aortic line of the heart-lung machine either by means of the bladders own elasticity or by a mechanical compression mechanism which can be programmed to simulate the human heartbeat.
Method Of Facilitating Oxygen Transport In Blood Oxygenators
Sean D. Plunkett - Mission Viejo CA Henry W. Palermo - Burbank CA
Assignee:
Medtronic, Inc. - Minneapolis MN
International Classification:
A61M 114 A61M 116 B01D 6100
US Classification:
210644
Abstract:
Oxygen transfer to blood plasma in a blood oxygenator using a microporous membrane exposed to blood on one side and to oxygen on the other is facilitated by bonding an oxygen-carrying chemical such as hematin or a perfluorocarbon to at least the blood-contacting surface of the membrane.
Blood Heat Exchange System Employing Micro-Conduit
Robert F. Gremel - Huntington Beach CA Sean D. Plunkett - Mission Viejo CA Henry W. Palermo - Burbank CA Gary D. Reeder - Morrison CO Peter Z. Kubisa - Littleton CO Peter J. Hier - Castle Rock CO
Assignee:
Medtronic, Inc. - Minneapolis MN
International Classification:
A61M 136
US Classification:
422 44
Abstract:
Micro-conduit with enhanced wetting characteristics for use in providing a blood heat exchanger apparatus with improved heat exchange capability. The micro-conduit comprises a plurality of elongated fibers, which may be made of a hydrophobic material such as polypropylene or polyethylene. Each fiber is open at two opposing ends, and has an inner surface between the open ends. The inner surface is coated with a wetting agent, such as phosphatidyl choline or another ampiphilic material with a hydrophilic end and a hydrophobic end. The fibers may have a shape and size that without presence of the wetting agent, would otherwise substantially impair free passage of water. The micro-conduit may be provided as a heat exchanger micro-conduit wrapping material, wherein micro-conduit fibers are attached to a thin flexible interconnect, such as woven netting, to maintain the fibers at predetermined spacings in substantially parallel alignment with each other. The wrapping material is wrapped about an elongated spindle to provide a generally cylindrical heat exchange core. Opposing first and second seals are created by applying potting compound between fibers proximate the spindle's first end and proximate the spindle's second end.
Sean D. Plunkett - Mission Viejo CA Henry W. Palermo - Burbank CA
Assignee:
Medtronic, Inc. - Minneapolis MN
International Classification:
A61M 3700
US Classification:
604 4
Abstract:
Pulsatile blood flow in a heart-lung machine is accomplished by pumping blood into a bladder at a constant rate, and cyclically emptying the bladder into aortic line of the heart-lung machine either by means of the bladder's own elasticity or by a mechanical compression mechanism which can be programmed to simulate the human heartbeat.
Electrostatic Blood Defoamer For Heart-Lung Machine
In a heart-lung machine, blood is defoamed without the use of defoaming chemicals by passing blood between parallel insulated electrodes whose electric field orients the blood protein molecules to break up the foam bubbles. The blood then passes into the venous reservoir through a bubble screen which traps any remaining bubbles.
Electrostatic Blood Defoamer For Heart-Lung Machines
In a heart-lung machine, blood is defoamed without the use of defoaming chemicals by passing blood between parallel insulated electrodes whose electric field orients the blood protein molecules to break up the foam bubbles. The blood then passes into the venous reservoir through a bubble screen which traps any remaining bubbles.