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Biomedical subjects

J H Baron

Publications and source records attributed to J H Baron.

At least 181 records · Page 10Linked to original sources
PubMed1976

A comparison of basal and stimulated gastric acid and duodenal bicarbonate in patients with and without duodenal ulcer disease.

Basal gastric secretion and the maximum response to pentagastrin and basal secretion into the duodenumand its near-maximum response to secretin were measured in 20 control subjects and ten patients with duodenal ulcer disease. In control subjects the volumes of stimulated gastric and duodenal secretions were significantly correlated. In patients with duodenal ulcer, there were no significant correlations between basal gastric and duodenal secretion but after stimulation both volumes and outputs (but not concnetrations) of gastric and duodenal secretions were significantly correlated. The bicarbonate secretory capacity in patients with duodenal ulcer was not only normal but was also comparable to the gastric acid secretory capacity. The basal bicarbonate content of the duodenal aspirate, however, in patients with duodenal ulcer was only half that in control subjects, perhaps another example of inadequate entry of bicarbonate into the duodenum in patients with duodenal ulcer in spite of the normal bicarbonate secretory capacity.

Adolescent↗
PubMed1975

Direct inhibition of gastric acid by growth-hormone release-inhibiting hormone in dogs.

To find out if growth-hormone release-inhibiting hormone (G.H.-R.I.H.) had any direct action on gastric acid production independent of its effect on gastrin release, cyclic G.H.-R.I.H. was infused at a rate of 20 mug. per kg. per hour into dogs with gastric fistulae. Gastric acid output fell sharply in response to three stimuli acid production--a meal and pentagastrin and histamine infusions. The fact that acid output was inhibited during pentagastrin administration suggests that G.H.-R.I.H. has a direct action on the gastric parietal cell.

Animal Feed↗
PubMed1975

Letter: Vagotomy.

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Chronic Disease↗
PubMed1975

Use and abuse of gastric function tests by British and American gastric surgeons.

The use of gastric function tests by American and British gastroenterologic surgeons in different clinical situations has been studied by questionnaire. Clinical practice on both sides of the Atlantic is generally similar. The major difference in the type of test employed is that pentagastrin cannot be used in clinical practice in the United States. Surgeons in the USA were much more liberal in their indications for gastric secretory tests than were their British counterparts. Significantly more tests were used by American surgeons, if x-ray evidence of duodenal or gastric ulcer existed, and to evaluate a post-gastrectomy patient, whether symptomatic or not. The British surgeonswere much less likely to allow the results of secretory tests to influence their surgical approach. The authors discuss indications for and the clinical value of gastric secretion tests and conclude that in most instances far too many tests are being employed.

Cross-Cultural Comparison↗
PubMed1975

Natural history and morphology of secretagogue-induced duodenal ulcers in rats.

Morphologically typical ulcers were produced in the first part of the duodenum in 300 male Wistar rats by subcutaneous infusion for 24 hr of pentagastrin (4 mug per kg-min) and carbachol (0.8 mug per kg-min). Groups of animals were killed daily for 14 days, and their stomachs and duodenums were examined. Lesions were graded on a seven-point scale: 0, normal; 1, inflammation; 2, petechiae; 3, erosions; 4, definite ulcer crater; 5, penetrating ulcer; and 6, perforated ulcer. Every animal developed one or more definite ulcers (grades 4 to 6). Within the first 48 hr 34% of the animals died with grade 6 ulcers. Ulcer healing began on the 1st postinfusion day when 3 of 46 rats had erosions (grade 3) but no definite ulcer craters. By the following day some animals were found with normal mucosa. After the 5th postinfusion day the few remaining grade 5 or 6 ulcers were those which had perforated and sealed spontaneously. These long-standing ulcers had several features similar to human chronic duodenal ulcers. By the 12th postinfusion day definite ulcers were no longer seen. In this study duodenal ulcers have not only been produced in rats by secretagogues, but have also been observed to heal. This model can be used to compare the efficacy of various antiulcer regimens on ulcer healing.

Animals↗
PubMed1975

The use of neutral red as a peroperative test of vagal innervation.

The cervical vagi were stimulated electrically in four groups of dogs after the intravenous injection of 10 ml of 1% neutral red. One group had intact vagi, the second group had denervation of the distal parietal cell area of the stomach, the third group proximal parietal cell denervation, and the last group had had a complete transthoracic truncal vagotomy. The area of stomach secreting neutral red was significantly related to the insulin-stimulated acid secretion. This technique may provide the basis of a test of residual vagal innervation of parietal cells during vagotomy operations in man.

Animals↗
PubMed1974

Simultaneous combined pancreatic test.

A simultaneous combined pancreatic test can be performed in one morning with only one intubation of the duodenum. The test includes the measurement of exocrine pancreatic secretion of bicarbonate, enzymes, and radioactive selenium, pancreatic scanning, hypotonic duodenography, and cytology of the duodenal aspirate. In the first 70 patients it was found that a single secretion test was of only limited value in detecting pancreatic disease; cytology was the most reliable and scanning the least reliable single test; and that the combined test provided near-complete discrimination between patients with no pancreatic disease, with chronic pancreatitis, and with carcinoma of the pancreas.

Acute Disease↗