The<unk>  The<unk>  is an open breathing system for delivering an anesthetic. The device was invented by Curt<unk>  in 1889, and was used until the 1950s (though it is still applied in some developing countries). The device consists of a wire frame which is covered with several beds of gauze and applied to the patient's face over the mouth and nose. Then high-volatility anesthetic (usually diethyl ether or halothane, and historically chloroform) is dripped on it, allowing the patient to inhale a mix of the evaporated anesthetic and air. The device is designed to prevent the anesthetic from coming in contact with the patient's skin, where it can cause irritation.
Schimmelbusch mask
Hutchinson's mask
Bag valve mask
Simple face mask
Pocket mask
Voice prosthesis
Air ioniser
Cloth face mask