US3585983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cardiac assisting pump
Assignee: L'VAD TECHNOLOGY Inc A CORP OF MI
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Filing: 1968-03-05
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Granted: 1971-06-22
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Expires: 1988-03-05
Abstract
Abstract An intra-arterial cardiac assisting device is provided having a nonelastic polyurethane balloon which is inflated periodically for diastolic augmentation by utilization of helium. The leading end of the device, which is passed into the aorta as a catheter, has a pressure transducer therein.
Inventors
- 👤 Adrian Kantrowitz
- 👤 Paul S Freed
- 👤 Wladimir Schilt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:06
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/50; A61M60/508; A61M60/515; A61M60/531; A61M60/10; A61M60/122; A61M60/126; A61M60/135; A61M60/139; A61M60/20; A61M60/295; A61M60/40; A61M60/497; A61M60/80; A61M60/841; A61M60/843; A61M25/00; A61M2025/0001; A61M2025/0002; A61M60/247; A61M60/253; A61M60/268; A61M60/274
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
202 words
An intra-arterial cardiac assisting pump comprising: a hollow elongated arterial catheter portion having an outer diameter sufficiently small to permit the insertion thereof into an artery, at least the outer surface thereof being provided with a biologically compatible material; a hollow elongated, perforated reenforcing element having a leading end and extending along at least a portion of said catheter and extending beyond the end of said catheter portion, said perforated reenforcing element having approximately the same diameter as said catheter portion and forming an extension thereof; a very thin-walled, generally inelastic, cylindrical polyurethane balloon portion surrounding said perforated reenforcing element and in gas sealing relationship with said catheter portion, said balloon portion having an area in cross section when inflated of approximately 20-80 times as great as that of the said reenforcing element; means for periodically feeding low density Gas to said balloon through said catheter and reenforcing element to periodically inflate said balloon to its maximum inelastic diameter; and internal pressure measuring means including a pressure transducer located at and connected to the leading end of said reenforcing element, electrical leads passing from said transducer through said reenforcing element and catheter, and means to translate the electrical signal from said transducer.
Claim 2
Dependent Claim
202 words
An intra-arterial cardiac assisting pump comprising: a hollow elongated arterial catheter portion having an outer diameter sufficiently small to permit the insertion thereof into an artery, at least the outer surface thereof being provided with a biologically compatible material; a hollow elongated, perforated reenforcing element having a leading end and extending along at least a portion of said catheter and extending beyond the end of said catheter portion, said perforated reenforcing element having approximately the same diameter as said catheter portion and forming an extension thereof; a very thin-walled, generally inelastic, cylindrical polyurethane balloon portion surrounding said perforated reenforcing element and in gas sealing relationship with said catheter portion, said balloon portion having an area in cross section when inflated of approximately 20-80 times as great as that of the said reenforcing element; means for periodically feeding low density Gas to said balloon through said catheter and reenforcing element to periodically inflate said balloon to its maximum inelastic diameter; and internal pressure measuring means including a pressure transducer located at and connected to the leading end of said reenforcing element, electrical leads passing from said transducer through said reenforcing element and catheter, and means to translate the electrical signal from said transducer.
Claim 3
Dependent Claim
28 words
A pump in accordance with claim 1 wherein said transducer is provided with a rigid housing, said housing comprising said connection to the end of said reenforcing element.
Claim 4
Dependent Claim
14 words
A pump in accordance with claim 2, wherein said catheter is formed of polytetrafluoroethylene.
Claim 5
Dependent Claim
16 words
A pump in accordance with claim 2 wherein said reenforcing element comprises a flexible braided tube.
Claim 6
Dependent Claim
13 words
A pump in accordance with claim 4 wherein said braided tube is metallic.
Claim 7
Dependent Claim
53 words
A pump in accordance with claim 5, wherein said polyurethane balloon has an inflated diameter on the order of 1-2 cm., wall thickness on the order of 0.100-0.125 mm., and a length of about 10-17 cm., and wherein said catheter and braided tube have outer diameters of about 5 and 3-5 mm., respectively.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |