Biomedical subjects
Publications and source records attributed to W B Salt.
Formation of a fistula between the gallbladder and bowel may allow a gallstone to enter the intestinal tract. In the two cases described here, the colon was involved. The authors describe diagnosis and management of these cases and make treatment recommendations based on their experience.
Vitamin B12 deficiency develops over a slowly progressive continuum. Early manifestations may be generalized weakness or fatigue, indigestion, diarrhea, or depression. Pernicious anemia is considered the classic cause, but others include malabsorption because of achlorhydria or other gastric dysfunction, fish tapeworm infection, and strict vegetarianism. Iron deficiency often coexists. Because presentation is often atypical, vitamin B12 deficiency is a diagnostic consideration whenever neuropsychiatric signs or symptoms are unexplained.
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Gastric volvulus is torsion of the stomach, which can compromise the gastric orifices and result in either acute or chronic and intermittent symptoms. We believe that gastric volvulus, especially when partial or intermittent, may be more common than has been previously thought. The condition should be suspected in any patient who has a history of retching or vomiting and has a paraesophageal hiatus hernia or eventration of the diaphragm. The classic triad of retching, severe and constant epigastric pain, and difficulty in passing a nasogastric tube should suggest the presence of acute gastric volvulus. The diagnosis is confirmed by specific findings on the upper gastrointestinal series. Acute gastric volvulus is a surgical emergency. Definitive treatment of recurrent chronic gastric volvulus is usually surgical, although conservative measures may have limited success.
Gastric volvulus is an uncommon condition in which an acquired torsion of the stomach results in acute or chronic gastrointestinal symptoms. We report a case of an intrathoracic organoaxial gastric volvulus presenting as a cholestatic syndrome, secondary to partial obstruction of the common bile duct by the diaphragm at the level of the hiatus. This entity has not been reported.
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Nafcillin, a semisynthetic penicillin effective against penicillinase-producing staphylococci, is eliminated largely in man via the liver. This study assessed the effect of cirrhosis and extrahepatic biliary obstruction in man on the pharmacokinetics of nafcillin. The plasma clearance of nafcillin controls was 583 +/- 144.2 ml per min (mean +/- SD) and fell strikingly to 291 +/- 147.6 and 163 +/- 56.3 ml per min in patients with cirrhosis and extrahepatic obstruction, respectively (P less than 0.001). In the latter two groups nafcillin excreted in urine increased from about 30 to 50% of administered dose (P less than 0.02), suggesting that renal disease superimposed on hepatic disease would further decrease over-all nafcillin clearance. The depression of nafcillin clearance with hepatobiliary disease did not correlate with any conventional liver laboratory test. The initial volume of distribution of nafcillin (V1) was unaltered but at steady state (Vd()) there was a significant reduction in the distribution volume in the patients with liver disease. Accordingly, the impairment in drug elimination, as assessed by its clearance from plasma, was underestimated by the prolongation of the nafcillin elimination half-life (t1/2(beta)) which was 1.02 +/- 0.20 hr in controls, and 1.23 +/- 0.31 (P greater than 0.05) and 1.73 +/- 0.44 hr (P less than 0.03), respectively, in patients with cirrhosis and extrahepatic obstruction.
This review of the English literature on amylase was undertaken because no recent discussion of the subject could be located, no comprehensive list of disorders causing hyperamylasemia or hyperamylasuria is available, and several major advances in the area have been made, notably the amylase isoenzyme determination and Cam/Ccr ratio. Several important concepts have emerged from this review. First, hyperamylasemia and hyperamylasuria are not specific indices of the presence of pancreatic disease or damage. Second, serum and urinary amylase levels can be spuriously normal with hypertriglyceridemia and pancreatitis. Third, the current emphasis on diagnostic methods for measuring serum amylase isoenzymes promises to improve the specificity of this determination. It will also enhance our understanding of the sources, distribution, metabolism, and elmination of amylase. Fourth, the development of the Cam/Ccr ratio may provide a practical diagnostic tool for separating clinically significant hyperamylasemia due to pancreatitis from that caused by other factors. Both the the isoamylase determination and Cam/Ccr ratio clearly require future research to place their clinical application in the proper perspective.
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