Severe seizures occurring during electroconvulsive therapy challenge any method of respiratory resuscitation. In 12 adults undergoing this treatment, mouth-to-nose breathing was consistently successful in preventing cyanosis. Higher than customary pressures were needed, and sometimes they had to be maintained long enough to overcome intermittent closure of the glottis, but the technique was easy to learn. The authors recommend mouth-to-nose breathing for emergencies in any patient who is in danger of anoxia during convulsions.
Elam JO, Ruben AM, Greene DG, Bittner TJ. Mouth-to-Nose Resuscitation During Convulsive Seizures. JAMA. 1961;176(7):565-569. doi:10.1001/jama.1961.03040200001001