Surgery – Truss – Perineal
Patent
1976-06-28
1978-11-28
Michell, Robert W.
Surgery
Truss
Perineal
A61B 508
Patent
active
041271157
ABSTRACT:
Respiratory flow rate is measured independent of gas type by establishing a supplementary flow component of the respiratory medium via a supplementary sensor modeled according to flow rate ratio after the primary respiratory flow sensor such that the sensors are subject to respective corresponding errors in dependence on the same parameter of any of the respective respiratory media. The respiratory flow signal is continuously corrected in dependency on the currently existent composition of the respiratory medium by forming the quotient of the respiratory flow signal and the supplementary signal from the supplementary sensor. In a second disclosed embodiment, the supplementary flow component is coupled to the primary respiratory flow sensor so that similitude is automatically provided. Either embodiment may be utilized to provide an inverse of the supplementary signal as a measure of a composition-dependent parameter such as viscosity, density or temperature coefficient of the respiratory gases.
REFERENCES:
patent: 3812714 (1974-05-01), Olofsson et al.
patent: 3857385 (1974-12-01), Hampl
patent: 4022193 (1977-05-01), Franetzki et al.
Michell Robert W.
Siemens Aktiengesellschaft
Thaler Michael H.
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