The Indiana nurse who removed the oxygen from a Clark County nursing home resident who died hours later has been charged with a felony.

The masks work the same way non-rebreather masks work on humans. The canine mask is attached to a standard oxygen tank.

A non-rebreather mask looks similar to an oxygen mask, as it has a similar portion on the face and is not connected to a ventilator.

Preoxygenation with a bag-valve-mask device does not reduce the risk for hypoxemia compared with preoxygenation with a facemask, a secondary analysis of two trials shows.

On arrival at the center, her oxygen saturation was 83% with 100% oxygen administered by non-rebreather mask; she was immediately intubated.