Mechanism of the Ileocecocolic Pylorus.
—Drs. Liberato Di Dio and Célio Fontão Carril of São Paulo have studied the mechanism of the ileocecocolic pylorus in a 26-year-old man whose cecum was exteriorized and had a defective wall (Rev. brasil. gastroenterol.6:67 [January-February] 1954). Reported direct observations of the ileocecocolic eminence, through the opened wall of the large intestine, showed the constancy of papillar morphology without cecocolic frenula. The terminal ileum showed an average of 13 to 14 rhythmic contractions per minute. An intravenous injection of 10 cc. of a 30% solution of sodium chloride resulted in a marked increase in tonus, followed by the expulsion of the rubber balloon introduced into the terminal ileum. An intravenous injection of 1 cc. of neostigmine (Prostigmin) also caused a marked increase in tonus. Faradic electric excitation produced only a slight increase in tonus. The ileal emptying reflex was noted twice several minutes