Abstract
A retention stomach tube in the form of an electrolytic cell has been devised which makes possible the determination of intragastric conductances at any desired interval of time without disturbance or removal of gastric contents. The tip contains also a thermocouple which makes possible intragastric temperature determinations and corrections, and an aspiration tube by means of which samples of gastric contents may, if desired, be collected for analysis. By means of this apparatus intragastric conductance variations were studied in connection with determinations of total acidity, free hydrocholoric acid, pepsin, and trypsin.The conductance of gastric juice is mainly due to the free hydrochloric acid which it contains and the same is generally true of the gastric contents. After the introduction of water or solutions (as sugar solutions) of very low conductance, the curve for conductance very closely follows the curve for free and total acid. This indicates that the equalization of osmotic concentration is ...
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