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US 5,449,342 AGranted
Apparatus for assisting blood circulation
AssigneeNippon Zeon Co., Ltd.
InventorsTeruo Hirose, Takashi Kawabata
Life of this patent
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AssigneeNippon Zeon Co., Ltd.
InventorsTeruo Hirose, Takashi Kawabata
Estimating the term…
An apparatus for assisting blood circulation includes an inflow tube which can be inserted into the right atrium from a peripheral blood vessel or which can be inserted into the left atrium from a peripheral blood vessel through the right atrium and the foramen ovale of the interarterial septum. An outflow tube is inserted into the aorta or into the carotid artery from a peripheral blood vessel to deliver the blood to the aorta or to the carotid artery. The outlet tube has an outlet for blood on the side of a upstream part of the tube and a blood pump which can take in the blood from the inflow tube and send out the blood to the outflow tube. When the former inflow tube is used, it also comprises an oxygen gas exchanger which exchanges carbon dioxide in the blood for oxygen. The apparatus can be very easily applied to the patient without thoracotomy to assist the circulation of blood. The function of the lung is assisted, the load on the heart is reduced and the blood flow volume of the coronary artery is increased. The circulation of blood in the whole body or in the brain is assisted.
An apparatus for assisting blood circulation in a human comprising an inflow tube for insertion into the right atrium of the heart of the human from a peripheral blood vessel of the human to draw blood from the right atrium, an outflow tube having a tip for insertion into either the aorta or the carotid artery of the human from a peripheral blood vessel of the human to deliver the blood to the aorta or to the carotid artery, the outflow tube further having two outlets for blood therefrom, one at the tip of the outflow tube and the other through the side of the outflow tube at an upstream location of the outflow tube spaced from the tip by a selected distance of 5 to 60 centimeters sufficient to cause blood from the upstream location to flow into the femoral artery, a blood pump for pulling blood from the inflow tube and expelling blood through the outflow tube and an oxygen gas exchanger positioned at a location downstream of the pump for exchanging carbon dioxide in the blood with oxygen and means located in the outflow tube for controlling blood flow volume therethrough wherein the blood flow volume through the outlet satisfies the equation:
An apparatus for assisting blood circulation in a patient comprising an inflow tube for insertion into the left atrium of the patient from a peripheral blood vessel through the right atrium of the patient and the foramen ovale of the interarterial septum of the patient to draw blood from the left atrium, an outflow tube having a tip for insertion into the aorta or carotid artery of the patient from a peripheral blood vessel to deliver the blood to the aorta or to the carotid artery, the outflow tube further having a side wall with an outlet therethrough for blood at an upstream location thereof, the upstream location being spaced from the tip by a selected distance, of 5 to 60 centimeters and a blood pump for taking in blood from the inflow tube and sending blood out of the outflow tube.
Dependencies are inferred from the claim text.