Surgery – Truss – Perineal
Patent
1986-05-23
1989-08-22
Jaworski, Francis
Surgery
Truss
Perineal
128702, A61B 502
Patent
active
048586188
ABSTRACT:
A method and apparatus for determining right heart ejection fraction by injecting a cold indicator into the right ventricle or locations in the heart upstream thereof during an injection period and allowing the indicator to be diluted with blood and flow to the pulmonary artery whereby the temperature of the fluid in the pulmonary artery falls and then rises, measuring the temperature of the fluid in the pulmonary artery at least during the time that the temperature in the pulmonary artery is rising, measuring a prebolus temperature of the blood in the pulmonary artery prior to the time that the cold indicator reaches the pulmonary artery, establishing a post bolus baseline temperature which is lower than said prebolus baseline temperature, comparing at least some of the measured temperatures during the time that the temperatures of the fluid in the pulmonary artery are rising to the post bolus baseline temperature to establish temperature differentials, and using at least some of the temperature differentials to determine ejection fraction.
REFERENCES:
patent: 3678922 (1972-07-01), Phillips et al.
patent: 4004576 (1977-01-01), Gahuiler et al.
patent: 4015593 (1977-04-01), Elings et al.
patent: 4023564 (1977-05-01), Valiguette et al.
patent: 4326539 (1982-04-01), Obermajer
patent: 4417588 (1983-11-01), Houghton et al.
patent: 4418700 (1983-12-01), Warner
patent: 4502488 (1985-03-01), Degironimo et al.
patent: 4632125 (1986-12-01), Webler et al.
International Conference on Biomedical Transducers, Paris, 3rd-7th Nov. 1975, Biocapt 1975, vol. 2, pp. 45-51.
N. Ohshima et al.: "A Simple Method for Measuring Cardiac Ejection Fraction".
Med. Progr. Technol., vol. 3, No. 4, Apr. 1976, pp. 161-167, Springer Verlag, Berlin, DE; A. Saadjian et al.,: "Cardiac Output Measurement by Thermodilution--Methodologic Problems".
Medical and Biological Engineering, vol. 6, No. 4, Aug. 1968, pp. 399-402, Pergamon Press, Stevenage, GB; B. W. Watson et al.; "Left Ventricular Volume Estimation in Man Using a Thermocouple in the Ascending Aorta".
Dhupar et al., A Microprocessor-Based Venticular Function Analyzer; Conference IEEE 1979 Frontiers of Engineering in Health Care Conference; pp. 145-149.
Jarlov, A. et al., Ventricular Volumes Determined from Indicator Dilution Curves; Medical & Biological Engineering & Computing; Jan. 1979 Issue; pp. 31-37.
Grune & Stratton; Progess in Cardiovascular Diseases; pp. 409-434; Mar./Apr. 1983.
Blesser, W. B.; A Systems Approach to Biomedicine; McGraw-Hill Book Co., New York 1969.
Daskalov, I. K.; Hybrid Computer for Dye-Dilution Curves; Medical & Biological Engineering & Computing; 1978; pp. 68-72.
Kay, H. R. et al.; Measurement of Ejection Fraction by Thermal Dilution Techniques; Journal of Surgical Research; vol. 34; pp. 337-246.
Martyn, J. A. J. et al.; Thermodilution Right Ventricular, The Journal of Trauma; vol. 21, No. 8; pp. 619-626.
Maruschak, G. F.; Temperature Wave Distortion by Catheter-Mounted Fast Response Thermistors; Abstract.
Maruschak, G. G.; Ejection Fraction by Thermodilution (Abstract); ASA; vol. 55; No. 3; Sep. 1981.
Morrison, D. et al.; The Effect of Pulmonary Hypertension of Systolic Function of the Right Ventricle; Chest; vol. 84; No. 3; Sep. 1983, pp. 250-257.
Rapaport, E.; Usefulness and Limitations of Thermal Washout Techniques in Ventricular Volume Measurement; American Journal of Cardiology; vol. 18; Aug. 1966; pp. 226-234.
Konno Mark A.
Ripley John A.
Baxter Travenol Laboratories Inc.
Hanley John C.
Jaworski Francis
Peterson Gordon L.
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