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.
Tips for CPAP. 1  Begin using your CPAP for short periods of time during the day while you watch TV or read. 2  Make CPAP part of your bedtime routine. 3  Make small adjustments to increase your level of comfort.  Make sure your mask is a good fit. The most common problems with CPAP occur when the mask does not fit properly.