Automatic determination of passive elastic and resistive propert

Details Automatic determination of passive elastic and resistive propert Automatic determination of passive elastic and resistive propert

1996-12-20

1999-03-23

Lewis, Aaron J.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820423, A61M 1600

Patent

active

058846220

ABSTRACT:
Passive elastic and resistance values for a particular patient are estimated during proportional assist ventilation and other forms of assisted ventilation to permit reliable adjustment for volume-related and flow-related assist gains to meet continuously varying patient muscle pressure. Independent but simultaneous procedures are effected to determine the respective values. The pressure-volume relationship is determined by a modification of the inspiratory hold technique while the pressure-flow relationship is determined by deliberately introducing brief perturbations in pressure, flow and volume and observing the effects obtained.

REFERENCES:
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patent: 5107830 (1992-04-01), Younes
patent: 5390666 (1995-02-01), Kimm et al.
patent: 5572993 (1996-11-01), Kurome et al.
patent: 5632269 (1997-05-01), Zdrojkowski
patent: 5692497 (1997-12-01), Schnitzer et al.
patent: 5720278 (1998-02-01), Lachmann et al.

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