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US5275580A
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Auxiliary artificial heart of the embedded-in-body type
Assignee: Sun Medical Technology Research Corp
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Filing: 1992-06-19
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Granted: 1994-01-04
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Expires: 2012-06-19
Abstract
Abstract An auxiliary artificial heart embedded in the human body. The auxiliary artificial heart has an apex cordis area ring and a body. The apex cordis area ring is embedded in a cut-out apex cordis area of the human heart. The body includes an elongated pump section and a drive section. The pump section is inserted into one of the ventricles of the human heart, passing through the apex cordis area ring. A front end nozzle whose diameter is smaller than that of the pump section is formed at the front end of the pump section, and it is inserted into the aorta or pulmonary artery, passing through the center of the aorta or pulmonary valve. The pump section sucks blood in the ventricle through its base portion and feeds it into the aorta or pulmonary artery through the front end nozzle.
Inventors
- 👤 Kenji Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:41
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/50; A61M60/585; A61M60/10; A61M60/122; A61M60/165; A61M60/17; A61M60/174; A61M60/178; A61M60/20; A61M60/205; A61M60/216; A61M60/237; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/416; A61M60/422; A61M60/508; A61M60/515; A61M60/531; A61M60/538; A61M60/80; A61M60/802; A61M60/81; A61M60/816; A61M60/818; A61M60/825; A61M60/855; A61M60/865; A61M60/871; A61M60/873; A61M60/876; A61M60/878; A61F; A61F2250/00; A61F2250/0001; A61M2205/00; A61M2205/15; A61M2205/33; A61M2205/3303; A61M2205/82; A61M2205/8237; A61M2205/8243; A61M2230/00; A61M2230/04; A61M2230/06; A61M2230/30; A61M2230/50; A61M60/126; A61M60/148; A61M60/89; A61M60/894; A61M60/896
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
248 words
An auxiliary artificial heart of the embedded-in-body type structured to be embedded in one of the ventricles of the heart of a human body comprising: a) an apex cordis area ring structured to be fixedly embedded in a cutout portion of the apex cordis area of the human heart; b) an artificial heart body including a pump section, a drive section for driving the pump section, and a nozzle; said pump section including a cylindrical pump of the axial-flow type having a base portion and a front end, driven by the drive section to suck blood through the base portion of the pump section and discharge it through the front end thereof, and said pump section being structured to be inserted into one of the ventricles, passing through the apex cordis area ring, said pump section defining a volume smaller than that of the ventricle in the human heart obtained when it naturally shrinks to the greatest extent; and said pump section having a casing, and said nozzle being formed of a flexible material differing from that of said casing, said drive section being structured to be arranged outside the human heart; said nozzle being provided at the front end of the pump section and structured to be inserted through the aortic valve of the human heart and into the aorta, whereby the blood in the ventricle is fed into the aorta through the nozzle at the front end of the pump by means of the pump section.
Claim 2
Dependent Claim
248 words
An auxiliary artificial heart of the embedded-in-body type structured to be embedded in one of the ventricles of the heart of a human body comprising: a) an apex cordis area ring structured to be fixedly embedded in a cutout portion of the apex cordis area of the human heart; b) an artificial heart body including a pump section, a drive section for driving the pump section, and a nozzle; said pump section including a cylindrical pump of the axial-flow type having a base portion and a front end, driven by the drive section to suck blood through the base portion of the pump section and discharge it through the front end thereof, and said pump section being structured to be inserted into one of the ventricles, passing through the apex cordis area ring, said pump section defining a volume smaller than that of the ventricle in the human heart obtained when it naturally shrinks to the greatest extent; and said pump section having a casing, and said nozzle being formed of a flexible material differing from that of said casing, said drive section being structured to be arranged outside the human heart; said nozzle being provided at the front end of the pump section and structured to be inserted through the aortic valve of the human heart and into the aorta, whereby the blood in the ventricle is fed into the aorta through the nozzle at the front end of the pump by means of the pump section.
Claim 3
Dependent Claim
33 words
The auxiliary artificial heart of the embedded-in-body type according to claim 1, wherein said front end nozzle has a non-return valve for preventing blood from returning to the pump section through the nozzle.
Claim 4
Dependent Claim
23 words
The auxiliary artificial heart of the embedded-in-body type according to claim 1, wherein said pump section includes a pump of the screw type.
Claim 5
Dependent Claim
58 words
The auxiliary artificial heart of the embedded-in-body type according to claim 1, wherein said front end nozzle is tilted relative to the pump section so as to match an angle which is formed by the axial direction of that ventricle of the human heart in which the artificial heart is embedded and the axial direction of the aorta.
Claim 6
Dependent Claim
49 words
The auxiliary artificial heart of the embedded-in-body type according to claim 1, including a control means, said drive section being connected to said control means, said control means being operable to control the operation of the drive section, depending upon the state of the heart in the human body.
Claim 7
Dependent Claim
22 words
The auxiliary artificial heart of the embedded-in-body type according to claim 5, wherein said control means is housed in the drive section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-03 | 1997-07-05 | 1998-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-03 | 2001-07-05 | 2002-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-03 | 2005-07-05 | 2006-01-04 | $7700.00 | Window Closed / Lapsed |