<unk>  is a medical process involving the insertion of a plastic tube<unk>  tube or NG tube) through the nose, past the throat, and down into the stomach. Orogastric<unk>  is a similar process involving the insertion of a plastic tube (orogastric tube) through the mouth. Abraham Louis Levin invented the NG tube.<unk>  tube is also known as Ryle's tube in Commonwealth countries, after John Alfred Ryle.
Nasogastric intubation
Tracheal intubation
Basic airway management
Advanced airway management
Surgical airway management
Blind insertion airway device
Tracheotomy
Laryngeal mask airway