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Robles FC, Laguna Neto D, Dias FG, Spressão M, Matos PN, Cordeiro JA, Pires AC. Diabetic ketoacidosis: difference between potassium determined by blood gas analysis versus plasma measurement. ACTA ACUST UNITED AC 2011; 55:256-9. [DOI: 10.1590/s0004-27302011000400003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Accepted: 04/26/2011] [Indexed: 11/21/2022]
Abstract
OBJECTIVE: To evaluate the accuracy of potassium concentrations measured by blood gas analysis (PBG) compared with laboratory serum potassium (LSP), in the initial care of patients with diabetic ketoacidosis (DKA). SUBJECTS AND METHODS: Fifty three patients with diabetes mellitus were evaluated in a retrospective analysis. PBG was carried out using the Radiometer ABL 700 (Radiometer Copenhagen®), and results were compared with LSP ADVIA 1650 Chemistry system (Siemens®), the gold standard method. Both methods are based on potentiometry. RESULTS: Mean PBG was 3.66 mmol/L and mean LSP was 4.79 mmol/L. Mean difference between PBG and LSP was -1.13 mmol/L (p < 0.0005, 95% CI, -1.39 to -0,86). Lin concordance correlation coefficient was rc = 0.28 (95% CIb, 0.10 to 0.45), demonstrating low concordance between the methods. CONCLUSION: Although PBG measurement is faster and easier, it should not be used as a surrogate for LSP in the clinical treatment of DKA.
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Affiliation(s)
| | | | | | - Márcia Spressão
- School of Medicine of São Jose do Rio Preto (Famerp), Brazil
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Kost GJ, Hale KN. Global trends in critical values practices and their harmonization. Clin Chem Lab Med 2011; 49:167-76. [DOI: 10.1515/cclm.2011.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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