Surgery – Diagnostic testing – Respiratory
Reexamination Certificate
2005-06-21
2005-06-21
Nasser, Robert L. (Department: 3736)
Surgery
Diagnostic testing
Respiratory
C073S023300, C422S084000
Reexamination Certificate
active
06908438
ABSTRACT:
Apparatus and methods for non-invasively determining cardiac output using partial re-breathing techniques are disclosed in which the apparatus is constructed with an instantaneously adjustable deadspace for accommodating differences in breathing capacities of various patients. The apparatus is constructed of inexpensive elements, including a single two-way valve which renders the apparatus very simple to use and inexpensive so that the unit may be readily disposable. The method of the invention provides a novel means of estimating cardiac output based on alveolar CO2values rather than end-tidal CO2values as previously practiced. A program for calculating cardiac output is also disclosed.
REFERENCES:
patent: 3910261 (1975-10-01), Ragsdale et al.
patent: 4192301 (1980-03-01), Hardwick
patent: 4239038 (1980-12-01), Holmes
patent: 4265235 (1981-05-01), Fukunaga
patent: 4941476 (1990-07-01), Fisher
patent: 4947860 (1990-08-01), Fisher
patent: 4949724 (1990-08-01), Mahutte et al.
patent: 5299579 (1994-04-01), Gedeon et al.
patent: 5402796 (1995-04-01), Packer et al.
patent: 5642726 (1997-07-01), Owens et al.
patent: 5752509 (1998-05-01), Lachmann et al.
patent: 5782774 (1998-07-01), Shmulewitz
patent: 5836300 (1998-11-01), Mault
patent: 5971934 (1999-10-01), Scherer et al.
patent: 6003511 (1999-12-01), Fukunaga et al.
patent: WO 98/12963 (1998-04-01), None
Article entitled “Noninvasive Measurement of Cardiac Output Using Partial CO2Rebreathing” by John M. Capek and Rob. J. Roy (pp. 653-661)- Printed in IEEE Transactions On Biomedical Engineering, vol. 35, No. 9—Sep. 1988.
Article entitled “Noninvasive Measurement of Cardiac Output Using Partial Carbon-Dioxide Rebreathing” by John Michael Capek (title, Introductory pp. and pp. 127-132)—Printed by UMI Dissertation Services—Dec. 1988.
Article entitled “Noninvasive Pulmonary Blood Flow for Optimal Peep” by A. Gedeon, ICOR AB, Ulvsundavägen 178 B, S-161 30 Bromma, Sweden (pp. 49-58).
Article entitled “Non-invasive pulmonary blood flow measurement by means of CO2analysis of expiratory gases” by Bosman, R.J., et al., Intensive Care Med (1991) 17:98-102.
Abstract FC 11 of article entitled “a Non-Invasive Technique for Measurement of Lung Perfusion” by H. Blomquist et al., published in “Monitoring, Computer, Instrumentation”, Intensive Care Medicine (1986) 12:172.
Sackner, Marvin A.,Measurement of cardiac output by alveolar gas exchange, Handbook of Physiology˜ The Respiratory System IV, Chapter 13: Pulmonary Capillary Blood Flow, pp. 233-255.
de Abreu, M. Gama, et al.,Reliability of the Partial CO2Rebreathing Technique for Measurement of Cardiac Output, Proceedings RC IEEE-EMBS & 14th BMESI—1995 (3 pages).
de Abreu, Marcel Gama, et al.,Partial carbon dioxide breathing: A reliable technique for noninvasive measurement of nonshurrted pulmonary capillary blood flow, Crit Care Med 1997, vol. 25, No. 4, pp. 675-683.
Osterlund, B., et al.,A new method of using gas exchange measurements for the noninvasive determination of cardiac output: clinical experiences in adults following cardiac surgery, Acta Anaesthesiologica Scandinavica 39 (1995), pp. 727-732.
Gedeon, A., et al.,Noninvasive Cardiac Output Determined with a New Method Based on Gas Exchange Meausrements and Carbon Dioxide Rebreathing: A Study in Animals/Pigs, Journal of Clinical Monitoring, vol. 8, No. 4, Oct. 1992, pp. 267-278.
Gedeon, A., et al.,A new method for noninvasive bedside determination of pulmonary blood flow, Medical & Biological Engineering & Computing, Jul. 1980, pp. 411-418.
de Abreu, Marcelo Gama, et al.,Measurement of Pulmonary Capillary Blood Flow for Trending Mixed Venous Blood Oxygen Saturation and Oxygen Delivery, 1 page.
Winkler, Tilo, et al.,Pulmonary Capillary Blood Flow by Partial CO2Rebreathing: A Simulation Study Using a Biocompartmental Model of Gas Exchange1 page.
de Abreu, Marcelo Gama, et al.,Is the Partial CO2Rebreathing Technique a Useful Tool for Trending Pulmonary Capillary Blood Flow During Adjustments of Peep?, 1 page.
Jaffe Michael B.
Kofoed Scott A.
Orr Joseph A.
Westenskow Dwayne
Nasser Robert L.
Respironics Novametrix, Inc.
TraskBritt
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