Avaliação da concordância entre as medidas da pressão inspiratória máxima em manovacuômetros analógico e digitais no serviço de terapia intensiva do Hospital Naval Marcílio Dias

Abstract

Maximal inspiratory pressure (MIP), obtained by manovacuometry, is a quantitative measurement of inspiratory muscle function and strength. This study aims to evaluate the agreement of the digital manovacuometer TieMeter MIP values with the analog Murenas and digital MVD300 manovacuometer, in vitro and in vivo, through comparative measurements. This is a cross-sectional and prospective study, with in vitro and in vivo MIP measurements obtained with the digital manovacuometer TieMeter and with the analog Murenas and digital MVD300 manovacuometers. In vitro, negative pressure was generated with a plastic syringe. In vivo, measurements were made on a convenience sample in an intensive care unit with intubated or tracheostomized patients. To verify the agreement of MIP values, the intraclass correlation coefficient (ICC) and the Bland-Altman diagram were used. For in vitro measures, the ICC between the values obtained with the analog and digital MVD300 manovacuometer was 0.999 (95% CI 0.998 to 0.999); with the analog and digital
TieMeter manovacuometer, 0.999 (95% CI 0.999 to 0.999); and with the MVD300 and digital TieMeter manovacuometer, 1.000 (95% CI 0.999 to 1.000). In vivo (n=53), the corresponding values were 0.997 (95% CI 0.995 to 0.998), 0.998 (95% CI 0.996 to 0.999), and 0.999 (95% CI 0.999 to 1.000). The analyses showed a strong agreement between the MIP measurements in the three tested devices, analog Murenas, digital MVD300, and TieMeter. The results contribute to facilitate the dissemination of the use of the TieMeter for MIP measurement in clinical and hospital environments for healthcare and research purposes.