Surgery – Truss – Pad
Patent
1980-09-26
1983-02-01
Howell, Kyle L.
Surgery
Truss
Pad
128725, 128665, A61B 500
Patent
active
043709869
ABSTRACT:
A method and apparatus for determining the deposition of particles in the respiratory tract and/or for checking the operating function of the respiratory tract by means of pulses of gases or aerosols injected into a stream of air inhaled by a test patient and by obtaining a measuring signal in each of the inhaled and exhaled streams. The main stream of the inhaled and exhaled air is conducted directly through a band of light (3), and the region of the intersection of the band of light with at least part of the inhaled and exhaled streams is placed in the object plane of an optical image system for a light measuring device. Either the individual pulses generated by the individual particles in the inhaled and exhaled streams or the scattered radiation emanating from the gases and aerosols in these streams is measured to obtain the ratio of the exhaled to the inhaled numbers of particles and/or the concentration profile in the inhaled and exhaled streams.
REFERENCES:
patent: 4067320 (1978-01-01), Olsson et al.
Gebhart Josef
Heigwer Gerhard
Heyder Joachim
Stahlhofen Willi
Gesellschaft fur Strahlen-und Umweltforschung mbH Munchen
Howell Kyle L.
Jaworski Francis J.
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