Serum and Peritoneal Fluid Amylase Levels in CAPD

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Abstract
The mean serum amylase of 42 asymptomatic CAPD patients was elevated but was not significantly different from that of a group of chronic hemodialysis patients. Serum amylase levels in CAPD patients with peritonitis were not elevated with respect to asymptomatic patients. Amylase activity was not detectable in the peritoneal fluid of 38/42 asymptomatic patients and 6/13 peritonitis patients and was present at low levels in the other 11 patients. Patients with other abdominal conditions (pancreatitis, cholecystitis and small bowel perforation) had very marked elevations of serum and/or peritoneal fluid amylase which differentiated them from the asymptomatic and peritonitis patients. Although hyperamylasemia is common in asymptomatic CAPD patients and in those with peritonitis, measurement of serum and peritoneal fluid amylase levels is useful in the evaluation of CAPD patients presenting with abdominal symptoms.