The aim of the present study is to determine the distribution of residual circumferential strains along the duodenum in anesthetized guinea pigs. A silicone elastomer was allowed to harden in the duodenal lumen under a pressure of 0.7 kPa. The duodenum was excised with the cast and photographed. The zero-stress state was obtained by cutting rings of duodenum radially. The geometric configuratio...

The effects of trifluoperazine and verapamil on bradykinin- and des-Arg(9)-bradykinin induced responses of isolated rat duodenum and guinea-pig ileum were investigated to elucidate post-bradykinin receptor events. Verapamil and trifluoperazine inhibited bradykinin induced relaxations and contractions and des-Arg(9)- bradykinin induced contractions in rat duodenum. Bradykinin induced contraction...

1. Thirty-five pigs were fitted with single re-entrant cannulas in either the duodenum, jejunum or ileum. A further twenty-four pigs were used in a conventional digestibility trial. 2. Methods for collecting, sampling and returning digesta were developed. 3. A 'practical-type' diet and two purfied diets were used, fed twice daily. 4. Flow and pH of digesta were measured hourly in the duodenum a...

Retrograde labeling of duodenum-sphincter of Oddi (SO) preparations in vitro with the carbocyanine dye DiI revealed that duodenal neurons project to the SO. The duodenum-SO-projecting neurons were immunoreactive (IR) for choline acetyltransferase but not nitric oxide synthase or calretinin, indicating that this is a cholinergic projection and that this pathway is distinct from the circuitry inv...

Jejunum and ileum from vitamin D-deficient rats actively secreted calcium when studied in vitro, while duodenum from these animals actively absorbed calcium. Acute repletion with a single physiologic dose of 25-hydroxyvitamin D3 (25-OH D3) (15 i.u.) increased calcium absorption in duodenum and ileum but had no effect on jejunum. Studies of the distribution of 25-OH D3 and its metabolites in the...

CONTEXT Primary adenocarcinoma of the duodenum is a rare digestive malignancy which is commonly treated by radical surgical resection, pancreaticoduodenectomy being the technique of choice. Complete tumor resection obtaining free margins should be the standard of treatment for primary adenocarcinoma of the duodenum. Segmental duodenal resection is an appropriate operation for selected cases of ...

Ewing (1931) states that the incidence of malignant tumours of the small intestine is 3% of neoplasms of the gastrointestinal tract. Shallow, Eger, and Carty (1944) reported the incidence of primary carcinoma of the duodenum in a study of 350,286 necropsies as 003%; the duodenum is affected in 45.6% of cases of small intestinal neoplasms. In this series care was taken to exclude undifferentiate...

LEIOMYOSARQOMA OF THE DUODENUM was first reported by von Salis in 1920. Since that time 60 cases have been noted in the world literature. The last comprehensive study was presented by Weinstein and Roberts in 1953. Their collective review of 28 cases suggested a poor prognosis, particularly with respect to the operative mortality which was 50 per cent. Since 1953 the rate of reporting leiomyosa...

Serotonin in blood plasma is primarily synthesized in the duodenum, as brain derived serotonin does not cross the blood-brain barrier. Because serotonin in the brain and retina is synthesized under the control of a circadian clock, we sought to determine if a circadian clock in the duodenum regulates serotonin synthesis and release in blood. We examined gene expression in the duodenum of chicke...

Hematoma duodenum is a very rare complication of diagnostic endoscopy of the upper gastrointestinal tract when biopsy of the duodenum is performed (average frequency is estimated as 1:1,250 biopsies). Most often, it affects children and young adults without any risk factors. Symptoms result from obstruction of the duodenum and compression of the adjacent structures. Conservative treatment, whic...