Müller's maneuver

Müller's maneuver is performed when you actively try to inspire using your diaphragm but your upper airway is closed. Typically there is no airflow. This maneuver is therefor the opposite of the Valsalva maneuver where you press against a closed upper airway. Müller's maneuver is part of the illness obstructive sleep apnea syndrome. Müller's maneuver can in the extreme cause negative pressure pulmonary edema. Maximum negative pressure is assumed to be around 80 cm H₂O.