Which of the following conditions is considered an absolute contraindication to high-frequency chest wall oscillation (HFCWC)?

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Absolute contraindications for usage of HFCWO include an unstable head,neck,rib cage,or back injury,or an active hemorrhage.Relative contraindications include subcutaneous emphysema,recent epidural spinal infusion,recent skin grafts,or flaps,burns,open wounds,and skin infections of the thorax,a recently placed transvenous pacemaker or subcutaneous pacemaker,suspected pulmonary TB,lung contusion,bronchospasm,or complaint of chest wall pain.

Which of the Following Conditions Is Considered an Absolute Contraindication