The mechanical power (MP) is the energy delivered into the respiratory system over time. It can be computed as a direct measurement of the inspiratory area of the airway pressure and volume loop during the respiratory cycle or calculated by “power equations”. The absence of a bedside computation limited its widespread use. Recently, it has been developed an automatic monitoring system inside of a mechanical ventilator. Purpose: Our aim was to investigate the repeatability and the accuracy of the measured MP at different PEEP values and tidal volume compared with the calculated MP. Material and methods: MP was measured and calculated in sedated and paralyzed ARDS patients at low and high tidal volume, at 5–10–15 cmH2O of PEEP both in volume and pressure-controlled ventilation. The same measurements were performed twice. Results: Fifty ARDS patients were enrolled. MP was measured and calculated for a total of 300 measurements. The bias and limits of agreement were 0.38 from −1.31 to 2.0 J/min. The measured and calculated MP were similar in each ventilatory condition. Conclusions: The mechanical power measured by a new automatic real time system implemented in a mechanical ventilator was repeatable and accurate compared with the computed one.

A validation study of a continuous automatic measurement of the mechanical power in ARDS patients / D. Chiumello, S. Coppola, P. Formenti, A. Ciabattoni, M. Lucenteforte, G. Liu, W. Mao, T. Pozzi. - In: JOURNAL OF CRITICAL CARE. - ISSN 0883-9441. - 67(2022 Feb), pp. 21-25. [10.1016/j.jcrc.2021.09.009]

A validation study of a continuous automatic measurement of the mechanical power in ARDS patients

D. Chiumello
Primo
;
S. Coppola
Secondo
;
P. Formenti;A. Ciabattoni;M. Lucenteforte;T. Pozzi
Ultimo
2022-02

Abstract

The mechanical power (MP) is the energy delivered into the respiratory system over time. It can be computed as a direct measurement of the inspiratory area of the airway pressure and volume loop during the respiratory cycle or calculated by “power equations”. The absence of a bedside computation limited its widespread use. Recently, it has been developed an automatic monitoring system inside of a mechanical ventilator. Purpose: Our aim was to investigate the repeatability and the accuracy of the measured MP at different PEEP values and tidal volume compared with the calculated MP. Material and methods: MP was measured and calculated in sedated and paralyzed ARDS patients at low and high tidal volume, at 5–10–15 cmH2O of PEEP both in volume and pressure-controlled ventilation. The same measurements were performed twice. Results: Fifty ARDS patients were enrolled. MP was measured and calculated for a total of 300 measurements. The bias and limits of agreement were 0.38 from −1.31 to 2.0 J/min. The measured and calculated MP were similar in each ventilatory condition. Conclusions: The mechanical power measured by a new automatic real time system implemented in a mechanical ventilator was repeatable and accurate compared with the computed one.
ARDS; Mechanical power; Ventilatory management; VILI
Settore MED/41 - Anestesiologia
6-ott-2021
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/877456
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