Patent US5927273A successfully refreshed from Google Patents.
US5927273A
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Combined liquid ventilation and cardiopulmonary resuscitation method
Assignee: Life Science Holdings Inc
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Filing: 1997-03-07
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Granted: 1999-07-27
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Expires: 2017-03-07
Abstract
Abstract A method and apparatus utilize liquid ventilation to increase the efficacy of cardiopulmonary resuscitation (CPR). The method involves replacing gas in the lungs with an oxygen and carbon dioxide carrying liquid to eliminate the decreased pumping efficiency of the heart seen during conventional or active compression-decompression (ACD) closed-chest CPR. A further advantage during ACD-CPR is the ability to perform liquid ventilation without a mechanical respirator. A further advantage is provided by supplying a continuous flow of liquid (or gaseous) ventilation medium throughout the entire chest compression/re-expansion cycle, dramatically accelerating both gas exchange and cooling or warming of the patient or animal subject.
Inventors
- 👤 Michael G. Federowicz
- 👤 Ronald M. Klatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:06
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0054; A61M16/04; A61M16/0402; A61M16/042; A61M16/10; A61M16/105; A61M16/106; A61M16/1065; A61M2202/00; A61M2202/04; A61M2202/0468; A61M2202/0476; A61M2205/00; A61M2205/50; A61M3/00; A61M3/02; A61M3/0204; A61M3/0208; A61M3/0212; A61M3/0216; A61M3/022; A61M3/0233; A61M3/0254; A61M3/0258; A61M3/0279; A61M3/0283; Y; Y10; Y10S; Y10S128/00; Y10S128/913
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
A cardiopulmonary resuscitation method, comprising providing a breathing liquid to lungs of a mammal and cyclically applying an external thoracic cavity pressure inducing force to a thoracic cavity of the mammal only when the lungs of the mammal are substantially filled with the breathing liquid, wherein the breathing liquid delivers oxygen to the lungs and collects carbon dioxide from the lungs.
Claim 2
Dependent Claim
61 words
A cardiopulmonary resuscitation method, comprising providing a breathing liquid to lungs of a mammal and cyclically applying an external thoracic cavity pressure inducing force to a thoracic cavity of the mammal only when the lungs of the mammal are substantially filled with the breathing liquid, wherein the breathing liquid delivers oxygen to the lungs and collects carbon dioxide from the lungs.
Claim 3
Dependent Claim
31 words
The method of claim 1, wherein the method further comprises placing a tracheal tube in a trachea of the mammal for delivery and withdrawal of the breathing liquid from the lungs.
Claim 4
Dependent Claim
15 words
The method of claim 1, wherein the breathing liquid is provided continuously to the lungs.
Claim 5
Dependent Claim
23 words
The method of claim 3, wherein the breathing liquid is provided at a volume of about 4 to about 6 liters per minute.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein the external thoracic cavity pressure varies between a positive pressure and a negative pressure.
Claim 7
Dependent Claim
15 words
The method of claim 1, wherein the breathing liquid is provided cyclically to the lungs.
Claim 8
Dependent Claim
20 words
The method of claim 1, wherein the breathing liquid comprises perfluorocarbon, hemoglobin based blood substitutes or non-hemoglobin based blood substitutes.
Claim 9
Dependent Claim
11 words
The method of claim 7, wherein the breathing liquid comprises perfluorocarbon.
Claim 10
Dependent Claim
23 words
The method of claim 1, wherein the breathing liquid is provided to the lungs at below a normal body temperature of the mammal.
Claim 11
Dependent Claim
19 words
The method of claim 9, wherein the breathing liquid is provided to the lungs at 30° C. or less.
Claim 12
Dependent Claim
24 words
The method of claim 1, wherein the method further comprises evacuating the lungs of air and other materials prior to providing the breathing liquid.
Claim 13
Dependent Claim
89 words
The method of claim 1, wherein the breathing liquid is provided from an apparatus comprising: a reservoir for holding breathing liquid; a source of oxygen for oxygenating the breathing liquid and in communication with the reservoir; a heat exchanger for cooling or warming the breathing liquid; one or more tubes in communication with the reservoir for transporting the breathing liquid to and from the apparatus; and one or more valves associated with the one or more tubes for controlling the flow of breathing liquid to and from the apparatus.
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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) | 2002-07-26 | 2003-01-25 | 2003-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-26 | 2007-01-25 | 2007-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-26 | 2011-01-25 | 2011-07-27 | $7700.00 | Window Closed / Lapsed |