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.
CPAP can also be used to deliver higher concentrations of oxygen to premature babies who have trouble maintaining good oxygen levels in their blood. How the CPAP Hooks up to the Nose With infants, CPAP is applied using binasal cannula (nasal prongs), a single nasopharyngeal cannula, or a soft nasal mask.