The victim was bound upon this wheel, on his knees, with his hands behind his back.
A continuous positive airway pressure (CPAP) machine was initially used mainly by patients for the treatment of sleep apnea at home, but now is in widespread use across intensive care units as a form of ventilation.
/ Treatments / CPAP Treatment. The CPAP (Continuous Positive Airway Pressure) machine connects to a mask, which provides a constant flow of air into the mouth and nose, keeping airways open so you can breathe more easily during sleep. CPAP is considered the most effective treatment for obstructive sleep apnea.