Surgery – Truss – Pad
Patent
1978-12-15
1982-06-08
Cohen, Lee S.
Surgery
Truss
Pad
128728, A61B 508
Patent
active
043334768
ABSTRACT:
The resistance of the lung is measured by the present technique both for unidirectional air flow and for alternating direction air flow at various points as a person rapidly exhales a maximum breath of air, and these measurements, together with other lung characteristic measurements provide comprehensive data for lung diagnosis and analysis. The equipment which is used is a closed system, and includes an input spirometer from which the subject draws air, and an output plastic air bag into which exhaled air is exhausted. A loudspeaker operated at 10 to 12 cycles per second supplies alternating air pressure signals to the mouth through a substantially conical or tapered transition to provide a good impedance match. Signals are recorded from an esophageal balloon system which measures lung pressure from inhalation and exhalation air rate sensors, and from a transducer which measures the pressure at the mouth. Suitable compensation and coupling networks are employed to compensate for the frequency response of the transducer systems, such as the esophageal balloon sensor. The input gas from the spirometer is free of nitrogen, and a mass spectrometer is employed to detect nitrogen exhaled by the subject to determine residual levels of air in the lungs.
REFERENCES:
patent: 3410264 (1968-11-01), Frederik
patent: 3527205 (1970-09-01), Jones
patent: 3598111 (1971-08-01), Kahn et al.
patent: 3713436 (1973-01-01), Hardway, Jr.
patent: 3726270 (1973-04-01), Griffis
patent: 4036222 (1977-07-01), Gillard et al.
patent: 4051843 (1977-10-01), Franetzki et al.
patent: 4122839 (1978-10-01), Franetzki et al.
Goldman et al., "A Simplified Measurement of Resp. Resist." J. App. Phys., vol. 28, No. 1, Jan. 1970.
Ross et al., "Direct Readout . . . Impedance", Med. & Biol. Eng., vol. 14, No. 5, pp. 558-564, Sep. 1976.
Finucane et al., "Estimation of Alyeoler Pressure . . . ", J. App. Phys., vol. 38, No. 3, pp. 531-537, Mar. 1975.
Murphy et al., "A Dynamic Compliance Computer . . . ", J. App. Phys., vol. 36, No. 5, pp. 629-633, May 1974.
Comroe, Jr. et al., "Design of Butyl Plethys. . . . ", J. App. Phys., vol. 14, May 1959, pp. 439-444.
LandOfFree
Comprehensive pulmonary measurement technique does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Comprehensive pulmonary measurement technique, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comprehensive pulmonary measurement technique will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-549851