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US5449342A
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Apparatus for assisting blood circulation
Assignee: Zeon Corp
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Filing: 1993-12-23
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Granted: 1995-09-12
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Expires: 2013-12-23
Abstract
Abstract 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.
Inventors
- 👤 Teruo Hirose
- 👤 Takashi Kawabata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:28
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3666; A61M1/3653; A61M1/3659; A61M1/3667; A61M60/00; A61M60/10; A61M60/104; A61M60/122; A61M60/126; A61M60/135; A61M60/139; A61M60/20; A61M60/295; A61M60/30; A61M60/36; A61M60/38; A61M60/40; A61M60/497; A61M60/50; A61M60/508; A61M60/562; A61M60/80; A61M60/855; A61M60/865; A61M60/867; A61M2205/00; A61M2205/32; A61M60/109; A61M60/113; A61M60/247; A61M60/253; A61M60/268; A61M60/274
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
250 words
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: 0.1≦F.sub.p /(F.sub.d +F.sub.p)≦0.5 wherein F d is the blood flow volume leaving the tip of the outflow tube and F p is the blood flow volume expelled from the outlet through the side of the outflow tube at the upstream location of the outflow tube.
Claim 2
Independent Claim
250 words
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: 0.1≦F.sub.p /(F.sub.d +F.sub.p)≦0.5 wherein F d is the blood flow volume leaving the tip of the outflow tube and F p is the blood flow volume expelled from the outlet through the side of the outflow tube at the upstream location of the outflow tube.
Claim 3
Dependent Claim
38 words
An apparatus for assisting blood circulation as claimed in claim 1 wherein a mechanism for adjusting the blood flow volume is attached to the outlet for blood on the side of a upstream part of the outflow tube.
Claim 4
Dependent Claim
55 words
The apparatus of claim 1, wherein the upstream outlet is spaced from the tip of the outflow tube by a distance at least approximately equal to the distance between the tip of the outflow tube and the branching location of the femoral artery and aorta of the specific humans with whom the apparatus is used.
Claim 5
Dependent Claim
48 words
An apparatus for assisting blood circulation as claimed in claim 1 wherein an inner tube is inserted at the inside of the upstream part of the outflow tube so that the outlet for blood through the side of the upstream part of the outflow tube can be closed.
Claim 6
Dependent Claim
20 words
An apparatus for assisting blood circulation as claimed in claim 1 wherein the blood pump is a vibration blood pump.
Claim 7
Dependent Claim
21 words
An apparatus for assisting blood circulation as claimed in claim 1 wherein the inflow tube has a device for preventing detachment.
Claim 8
Dependent Claim
22 words
An apparatus for assisting blood circulation as claimed in claim 1 wherein the outflow tube includes a balloon for effecting counter pulsation.
Claim 9
Dependent Claim
55 words
The apparatus of claim 1, wherein the upstream outlet is spaced from the tip of the outflow tube by a distance at least approximately equal to the distance between the tip of the outflow tube and the branching location of the femoral artery and aorta of the specific human with whom the apparatus, is used.
Claim 10
Dependent Claim
31 words
The apparatus of claim 1, wherein only a single inflow catheter is disposed in the vein and only a single outflow catheter is disposed in the femoral artery and the aorta.
Claim 11
Independent Claim
142 words
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.
Claim 12
Independent Claim
142 words
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.
Claim 13
Dependent Claim
38 words
An apparatus for assisting blood circulation as claimed in claim 10 wherein a mechanism for adjusting the blood flow volume is attached to the outlet for blood on the side of an upstream part of the outflow tube.
Claim 14
Dependent Claim
84 words
An apparatus for assisting blood circulation as claimed in claim 10 wherein an opening for the size of the outlet of blood through the side wall of the of the outflow tube at the upstream location is controlled so that blood flow volume through the outlet satisfies the equation: 0.1≦F.sub.p /(F.sub.d +F.sub.p)≦0.5 wherein F d is the blood flow volume leaving the tip of the inflow tube and F p is the blood flow volume expelled from the outlet through the opening wall thereof.
Claim 15
Dependent Claim
55 words
The apparatus of claim 12, wherein the upstream outlet is spaced from the tip of the outflow tube by a distance at least approximately equal to the distance between the tip of the outflow tube and the branching location of the femoral artery and aorta of the specific mammal with which the apparatus is used.
Claim 16
Dependent Claim
48 words
An apparatus for assisting blood circulation as claimed in claim 10 wherein an inner tube is inserted at the inside of the upstream part of the outflow tube so that the outlet for blood on the side of the upstream part of the outflow tube can be closed.
Claim 17
Dependent Claim
20 words
An apparatus for assisting blood circulation as claimed in claim 10 wherein the blood pump is a vibration blood pump.
Claim 18
Dependent Claim
21 words
An apparatus for assisting blood circulation as claimed in claim 10 wherein the inflow tube has a device for preventing detachment.
Claim 19
Dependent Claim
22 words
An apparatus for assisting blood circulation as claimed in claim 10 wherein the outflow tube includes a balloon for effecting counter pulsation.
Claim 20
Dependent Claim
31 words
The apparatus of claim 10, wherein only a single inflow catheter is disposed in the vein and only a single outflow catheter is disposed in the femoral artery and the aorta.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-11 | 1999-03-13 | 1999-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-11 | 2003-03-13 | 2003-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-11 | 2007-03-13 | 2007-09-12 | $7700.00 | Window Closed / Lapsed |