Process for determining the mechanical properties of the respira

Details Process for determining the mechanical properties of the respira Process for determining the mechanical properties of the respira

1997-11-20

1999-03-02

Nasser, Robert L.

Surgery

Diagnostic testing

Respiratory

600538, A61N 500

Patent

active

058763520

ABSTRACT:
A process and device for determining mechanical properties of a respiratory system of a patient connected to a respirator, wherein a short-term occlusion of the patient's airways is performed during an inspiration phase and/or an expiration phase. Initiating of the occlusion is at different points in time within the breathing cycle and during a plurality of breaths. The respiratory flow and the inhaled or exhaled volume of the patient is determined at the beginning of this occlusion. The airway pressure is also measured during this occlusion. The change occurring over time in the airway pressure during a measurement time falling within the occlusion time is determined. Also determined is the course over time of the change occurring over time of the muscle pressure of the patient from the measured values. The course over time of the muscle pressure is calculated by integrating this course over time.

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patent: 5316009 (1994-05-01), Yamada
patent: 5584300 (1996-12-01), Gaides
Kreit et al. 1994 "Patient Work of Breathing during Pressure Support . . . " American Journal of Respiratory and Critical Care Medicine.
Dragerwerk Jul. 1994 EVITA 4, Intensive Care Ventilator EVITA User's Manual.
Sydow et al. 1991 "Improved determination of static . . . " Intensive Care Medicine.
Matamis et al. 1984 "Total Respiratory Pressure-Volume Curves . . . " Chest .

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