Gastrointestinal intraluminal pH.

MULTICHANNEL INTRALUMINAL IMPEDANCE AND pH.

Gastrointestinal intraluminal pH in normal subjects and those with colorectal adenoma or carcinoma.

Recent evidence suggests that the production of colorectal carcinogens is facilitated when the pH of the colonic contents is alkaline. It follows that the colonic intraluminal pH of patients with colorectal neoplasms should be higher than in normal subjects. Gastrointestinal pH has been measured in 30 patients with colorectal cancer and 37 patients with benign colorectal adenomas (using a pH se...

Intraluminal gastric pH in chronic pancreatitis.

The aim of this study was to assess the circadian variations of intragastric pH in 28 inpatients with chronic pancreatitis (mean (SD) age 46.8 (12.4) years) and in 14 controls (45.4 (9.8)). pH Metry was performed using a monocrystalline antimony electrode placed in the body of the stomach under fluoroscopic control and connected up to a recorder (MKII Digitrapper, Synectics). The evaluation par...

Intraluminal Duodenal (“Windsock”) Diverticulum: A Rare Cause of Gastrointestinal Bleeding

A 67-year-old man was admitted to the emergency department with a recent history of melena and progressive fatigue. He had a past medical history of hypertension, dyslipidemia, ischemic heart disease, chronic renal failure and was on antiaggregation therapy. Physical examination showed pallor and hemodynamic stability. Laboratory workup revealed normocytic anemia (hemoglobin 9 g/dL; normal: 13-...

Effect of intraluminal pH on the absorption of pteroylmonoglutamic acid.

The administration of pteroylmonoglutamic acid and either sodium bicarbonate or phenytoin sodium in normal subjects and epileptics results in lower serum levels of folic acid than when administered alone. Bicarbonate administration was shown to produce a more alkaline pH in the jejunum, while an alkaline pH was found in some epileptics on phenytoin therapy. The physicochemical mechanisms whereb...