Ultrasound of Accessory Respiratory Muscles

The study was performed using a Mindray TE7 ultrasound machine with the depth of the linear probe at 70 mm and gain of 90 dB; settings remained unchanged during the study. Measurements of the right m. sternocleidomastoideus, the right m. trapezius, and the right upper leg were taken, with the final value being the average of three measurements for each. The probe was set at the musculoskeletal ultrasound setting.