Decreasing the Local Anesthetic Volume From 20 to 10 mL for Ultrasound-Guided Interscalene Block at the Cricoid Level Does Not Reduce the Incidence of Hemidiaphragmatic Paresis

Abstract

Decreasing the volume for interscalene block from 20 to 10 mL did not reduce the incidence of hemidiaphragmatic paresis or impairment in pulmonary function, which persisted at discharge from recovery room. No significant differences in quality or duration of analgesia were observed.