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This doctor's dissertation contributes important data on two questions. The first is whether the individual glands (the liver, the pancreas and the duodenal glands) which pour their secretion into the duodenum are capable of adapting the nature of their secretion to the nature of the food to be digested, and the second is whether normal gastric digestion is a necessary prerequisite for normal duodenal digestion. In studying the former question Christiansen took a series of normal human subjects and by means of an Einhorn tube introduced into their duodenums chyme obtained by aspiration from the stomachs of other normal subjects. The donors had masticated and swallowed meals consisting of starch, veal or 16 per cent cream, according to whether carbohydrate, protein or fat was to be studied. This avoided many of the objections to experiments on animals and to observations on human patients with traumatic or surgical fistulas and enabled
Kliniske studier over den digestive duodenalsaftsekretion. Arch Intern Med (Chic). 1936;57(1):239. doi:10.1001/archinte.1936.00170050247021
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