Evaluation of the Prognostic Value of Preoperative Quadriceps and Respiratory Muscle Thickness by Ultrasound Measurement in Cardiac and Thoracic Surgery Patients

the measurements will be performed during inspiration and expiration to take into account variability during the respiratory cycle. The examination is performed bilaterally and comparatively and lasts between 3 and 5 minutes.

The examination is performed bilaterally and comparatively and takes between 3 and 5 minutes.

The examination is performed bilaterally and comparatively and takes between 5 and 10 minutes.

measurements performed bilaterally on a patient in a half-sitting position at 45° and in spontaneous ventilation

In spontaneous ventilation, lying down, arms by the side of the body, palms up, head down