A<unk>  <unk> , also known as<unk> <unk> , is a medical device that keeps a patient's<unk>  open during anaesthesia or while they are unconscious. It is a type of supraglottic<unk>  device. They are most commonly used by anaesthetists to channel oxygen or inhalational anaesthetic to the lungs during surgery and in the pre-hospital setting (for instance by paramedics and emergency medical technicians) for unconscious patients. A<unk> <unk>  is composed of an<unk>  tube that connects to an elliptical<unk>  with a cuff which is inserted through the patient's mouth, down the windpipe, and once deployed forms an airtight seal on top the glottis (unlike tracheal tubes which pass through the glottis) allowing a secure<unk>  to be managed by a health care provider. The<unk> <unk>  was invented by British anaesthesiologist Archibald Brain in the early 1980s and in December 1987 the first commercial<unk> <unk>  was made available in the United Kingdom. The<unk> <unk>  is still widely used today worldwide and a variety of specialised<unk> <unk> s exist.
Laryngeal mask airway
Venturi mask
N95 respirator
Elastomeric respirator
Electrolarynx
Nasal cannula
Chondrolaryngoplasty
Nasal irrigation