The clinical validity of a continuous colorimetric method for measuring pancreatic lipase was assessed. 1,2-Diacylglycerol containing long-chain fatty acid residues was used as substrate, and the method was adapted to a discrete analyser. The dynamic range was ascertained up to at least 30-fold the upper reference limit. Precision tests on three control sera yielded overall CVs of 4.6% (mean value 21 U/l), 2.4% (115 U/I), and 1.0% (386 U/l), respectively. Using serum samples from normal subjects and patients with pancreatic and non-pancreatic disorders, the present method was compared with a turbidimetric method (r = 0.997; n = 281) and a homogeneous enzyme immunoassay (r = 0.987; n = 93). The reference interval established on 121 healthy subjects was 8-57 U/l (central 95th percentile, median 22 U/l). The sensitivity of this lipase assay in the diagnosis of acute pancreatitis (100%, median 5.6-fold the upper reference limit) was equal to that of the pancreatic isoamylase assay, and higher than that of the total oc-amylase assay (88.2%); the specificity for acute pancreatis with respect to a group of patients with acute and chronic non-pancreatic abdominal diseases (91%) was higher than that of both pancreatic isoamylase (76%) and total α-amylase (71%).

Clinical validity of a continuous colorimetric method for serum lipase / Melzi d'Eril GV, Bosoni T, Moratti R, Ventrucci M, Fumagalli A, Tarenghi G. - In: EUROPEAN JOURNAL OF CLINICAL CHEMISTRY AND CLINICAL BIOCHEMISTRY. - ISSN 0939-4974. - 30:7(1992 Jul), pp. 439-444.

Clinical validity of a continuous colorimetric method for serum lipase

Melzi d'Eril GV;
1992-07

Abstract

The clinical validity of a continuous colorimetric method for measuring pancreatic lipase was assessed. 1,2-Diacylglycerol containing long-chain fatty acid residues was used as substrate, and the method was adapted to a discrete analyser. The dynamic range was ascertained up to at least 30-fold the upper reference limit. Precision tests on three control sera yielded overall CVs of 4.6% (mean value 21 U/l), 2.4% (115 U/I), and 1.0% (386 U/l), respectively. Using serum samples from normal subjects and patients with pancreatic and non-pancreatic disorders, the present method was compared with a turbidimetric method (r = 0.997; n = 281) and a homogeneous enzyme immunoassay (r = 0.987; n = 93). The reference interval established on 121 healthy subjects was 8-57 U/l (central 95th percentile, median 22 U/l). The sensitivity of this lipase assay in the diagnosis of acute pancreatitis (100%, median 5.6-fold the upper reference limit) was equal to that of the pancreatic isoamylase assay, and higher than that of the total oc-amylase assay (88.2%); the specificity for acute pancreatis with respect to a group of patients with acute and chronic non-pancreatic abdominal diseases (91%) was higher than that of both pancreatic isoamylase (76%) and total α-amylase (71%).
Settore BIO/12 - Biochimica Clinica e Biologia Molecolare Clinica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/185004
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