A Perioperative Evaluation of Respiratory Mechanics Using the Forced Oscillation Technique.

Kuzukawa, Yosuke; Nakahira, Junko; Sawai, Toshiyuki; Minami, Toshiaki · Anesth Analg · 2015

prospective_cohort · Level II

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Abstract

The forced oscillation technique is a new approach for assessing perioperative respiratory function. This study enrolled 40 patients undergoing general anesthesia: 20 for ≥2 hours and 20 for <2 hours. Respiratory parameters were measured the day before and after surgery using forced oscillation during normal tidal breathing. Respiratory resistance at 5 Hz (P = 0.029 with the Student t test with unequal variances and P = 0.033 with analysis of covariance) changed significantly in the patients who underwent procedures for which they were anesthetized for >2 hours. The forced oscillation technique is a clinical tool that can be used to assess the effects of perioperative ventilation strategies on respiratory mechanics.

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