amnion. the innermost fetal membrane, which forms a sac filled with amniotic fluid that surrounds the embryo and later the fetus; as it enlarges it gradually obliterates the chorionic cavity and enfolds the umbilical cord. Called also bag of waters.
cluster breathing. cluster breathing. a breathing pattern in which a closely grouped series of respirations is followed by apnea. The activity is associated with a lesion in the lower pontine region of the brainstem. See also Biot's respiration, Cheyne-Stokes respiration.
âGasping is an indication that the brain is still alive and it tells you that if you start and continue uninterrupted chest compressions, the person has a high chance of surviving. The challenge is to educate bystanders that if they are helping someone in cardiac arrest, not to mistake gasping for breathing.