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A new simple method to perform pressure-volume curves obtained under quasi-static conditions during mechanical ventilation

To describe a fast, simple method to acquire pressure-volume curves of the respiratory system and to compare this with a classic method in terms of reliability of the data and speed. Acquisition of pressure-volume curves by low flow inflation technique (P-Vlf) versus the occlusion technique (P-Vst)...

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Published in:Intensive care medicine 1999-02, Vol.25 (2), p.173-179
Main Authors: RODRIGUEZ, L, MARQUER, B, MARDRUS, P, MOLENAT, F, LE GRAND, J. L, REBOUL, M, GARRIGUES, B
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container_title Intensive care medicine
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MARQUER, B
MARDRUS, P
MOLENAT, F
LE GRAND, J. L
REBOUL, M
GARRIGUES, B
description To describe a fast, simple method to acquire pressure-volume curves of the respiratory system and to compare this with a classic method in terms of reliability of the data and speed. Acquisition of pressure-volume curves by low flow inflation technique (P-Vlf) versus the occlusion technique (P-Vst) using the standard equipment of a Cesar ventilator. General ICU - Aix en Provence Hospital. Ten sedated, curarized patients undergoing mechanical ventilation. P-Vlf curves were acquired by setting the ventilator parameters at f = 5 c./min, duty time Ti/Ttot = 80 %, VT = 1100 ml, pause time = 0. The pressure and volume data were collected directly on the ventilator screen. P-Vst curves were acquired using an airway occlusion technique. The pressures obtained for the same inflation volumes and times necessary for performance of the two techniques were compared. The time needed to acquire a P-Vlf curve was 3 min versus 38 min for P-Vst curve. Concordance analysis between the two methods showed a 95 % confidence interval of (-0.5 cm H2O, + 1.8 cm H2O) for pressure. P-Vlf curves are close to P-Vst curves, are much less time-consuming, easy to acquire with Cesar ventilator equipment, and may be used in clinical routine to assess the elastic properties of the respiratory system.
doi_str_mv 10.1007/s001340050812
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identifier ISSN: 0342-4642
ispartof Intensive care medicine, 1999-02, Vol.25 (2), p.173-179
issn 0342-4642
1432-1238
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source Springer Nature
subjects Adult
Aged
Aged, 80 and over
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Biological and medical sciences
Biomechanical Phenomena
Emergency and intensive respiratory care
Female
France
Humans
Intensive care
Intensive care medicine
Intensive Care Units
Linear Models
Lung - physiopathology
Lung Compliance
Lung Volume Measurements
Male
Medical sciences
Methods
Middle Aged
Patients
Positive-Pressure Respiration
Positive-Pressure Respiration, Intrinsic
Pressure
Respiratory system
Treatment Outcome
Ventilators
title A new simple method to perform pressure-volume curves obtained under quasi-static conditions during mechanical ventilation
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