EP0283850A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for the extra-corporeal oxygenation of blood and for cardiovascular assistance
Assignee: Individual
•
Filing: 1988-03-09
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Granted: —
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Expires: 2008-03-09
Abstract
Abstract Method and device for pumping and oxygenating blood circulated extra-corporeally in cardiovascular assistance. Pumping is of the pulsed-flow type and is carried out by regular variations of the pressure exercised by the oxygenating fluid on the blood-fluid interface, so that the pumping and oxygenating actions proceed simultaneously in a single apparatus.
Inventors
- 👤 Franco Maria Montevecchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:07
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/14; A61M1/16; A61M1/26; A61M1/267; A61M1/3606; A61M1/3623; A61M1/3643; A61M1/3644; A61M1/1698; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
A method for extra-corporeal circulation of blood and for cardiovascular and/or respiratory assistance, the method comprising shunting venous blood from the patient, oxygenating said blood by passing it in a controlled way through a membrane oxygenator and feeding the oxygenated blood back to the patient's circulatory system by pumping means, characterized by the oxygenation and pumping being done simultaneously in one phase.
Claim 2
Independent Claim
62 words
A method for extra-corporeal circulation of blood and for cardiovascular and/or respiratory assistance, the method comprising shunting venous blood from the patient, oxygenating said blood by passing it in a controlled way through a membrane oxygenator and feeding the oxygenated blood back to the patient's circulatory system by pumping means, characterized by the oxygenation and pumping being done simultaneously in one phase.
Claim 3
Dependent Claim
34 words
A method according to Claim 1, characterized by the pumping, oxygenation and removal of the carbon dioxide being effected by periodical variations of the pressure of the oxygenating fluid on the blood-fluid interface membrane.
Claim 4
Dependent Claim
22 words
A method according to Claim 2, characterized by said periodical pressure variations being pulsed and controllable in frequency, amplitude and pulse form.
Claim 5
Independent Claim
25 words
A method according to Claims 1 and 2, characterized by blood temperature being regulated by variation of the temperature of the oxygenating and pumping fluid.
Claim 6
Independent Claim
27 words
A method according to any of the preceding Claims, characterized by the use of an oxygenating and pumping fluid consisting of oxygen and air or other fluids.
Claim 7
Independent Claim
143 words
A device for the extra-corporeal circulation of blood for cardiovascular assistance, of the type consisting essentially of an oxygenator, a pump and means to connect said pump and oxygenator to the circulatory system of the patient, characterized in that the oxygenator and pump form a single apparatus, essentially consisting of: an air-tight container inside which there are one or more blood-oxygenating fluid interfaces, permeable to gases but not to blood and liquids in general, and defining an exchange area between two circulation spaces for blood and oxygenating fluid, respectively; means to connect the blood circulation space with the patient's circulatory system; and means to connect the oxygenating fluid circulation space with an intake from a source of oxygenating fluid and discharge for the oxygenating liquid containing carbon dioxide; and in that means to periodically vary the pressure of the oxygenating fluid are provided.
Claim 8
Independent Claim
143 words
A device for the extra-corporeal circulation of blood for cardiovascular assistance, of the type consisting essentially of an oxygenator, a pump and means to connect said pump and oxygenator to the circulatory system of the patient, characterized in that the oxygenator and pump form a single apparatus, essentially consisting of: an air-tight container inside which there are one or more blood-oxygenating fluid interfaces, permeable to gases but not to blood and liquids in general, and defining an exchange area between two circulation spaces for blood and oxygenating fluid, respectively; means to connect the blood circulation space with the patient's circulatory system; and means to connect the oxygenating fluid circulation space with an intake from a source of oxygenating fluid and discharge for the oxygenating liquid containing carbon dioxide; and in that means to periodically vary the pressure of the oxygenating fluid are provided.
Claim 9
Dependent Claim
17 words
A device according to Claim 6, characterized by said membranes forming essentially tube-shaped conduits which are interconnected.
Claim 10
Dependent Claim
22 words
A device according to Claim 6, characterized by the said membranes being formed by flat elements, spaced to define therebetween interconnected passages.
Claim 11
Independent Claim
17 words
A device according to Claims 7 or 8, characterized by said tubes or passages containing the blood.
Claim 12
Independent Claim
19 words
A device according to Claims 7 or 8 , characterized by said tubes or passages containing the oxygenating fluid.
Claim 13
Dependent Claim
33 words
A device according to Claim 6, characterized by the said connections at the inlet and the outlet of the blood circulation space containing non-return valves of a mechanical, prosthetic graft or biomorph type.
Claim 14
Dependent Claim
49 words
A device according to Claim 6, characterized by the said means for varying the pressure of the oxygenating fluid including, besides a pressure regulator placed upstream of said container, also a vacuum source downstream of the same container, connected to the discharge of the oxygenating fluid containing carbon dioxide.
Claim 15
Independent Claim
25 words
A device according to any of the preceding Claims, characterized by the said oxygenating fluid being a mixture of oxygen and air or other fluids.
References Cited (Backward Citations)
No citation records indexed.
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