Answer: Hamman's syndrome is a clinical condition and frequently requires ICU admission for observation. It is a spontaneous pneumomediastinum with subcutaneous emphysema. It occurs mostly in young females peripartum or postpartum. It is named after the physician (Louis Hamman 1877–1946), who described it.
Hamman's syndrome usually occurs in the second stage of labor but can be delayed to the postpartum phase. An association with prolonged labor has been proposed (increase intrathoracic pressure) with rupture of alveoli.
Treatment is supportive and course is usually benign.
Dudley DK, Patten DE. Intrapartum pneumomediastinum associated with subcutaneous emphysema. CMAJ 1988;139:641-2
