Force-feeding is the practice of feeding a human or animal against their will. The term gavage refers to supplying a substance by means of a small plastic feeding tube passed through the nose (nasogastric) or mouth (orogastric) into the stomach.
A suffragette is force-fed in HM Prison Holloway in the UK during hunger strikes for women's suffrage, approximately 1911.
Clipping from World Magazine, September 6, 1914
1911 Votes for Women poster about William Ball (suffragist)
Guantanamo captives who will not comply with force-feeding have their arms, legs and head restrained in a feeding chair. They remain strapped in the chair until the nutrient is digested, to prevent induced vomiting.
Nasogastric intubation is a medical process involving the insertion of a plastic tube through the nose, down the esophagus, and down into the stomach. Orogastric intubation is a similar process involving the insertion of a plastic tube through the mouth. Abraham Louis Levin invented the NG tube. Nasogastric tube is also known as Ryle's tube in Commonwealth countries, after John Alfred Ryle.
Stomach tube (Levin type), 18 Fr × 48 in (121 cm)
Polyurethane NG tube (Viasys Corflo), 8 Fr × 36 in (91 cm). This fine bore tube is appropriate for longer use (up to 4 weeks).