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Serum  -Hydroxybutyrate Measurement in Patients With Uncontrolled Diabetes Mellitus
Milford Fulop, MD;
Vadiraja Murthy, PhD;
Angelo Michilli, DO;
Jhansi Nalamati, MBBS;
Qi Qian, MD;
Alan Saitowitz, MB, BCh
Arch Intern Med. 1999;159:381-384.
Objective To assess whether routinely measuring serum  -hydroxybutyrate (-OHB) concentration might help judge the severity of or assist in treating patients with suspected ketoacidosis.
Methods Serum -OHB level was estimated by a standard enzymatic method in 64 episodes in adults admitted to a municipal hospital. Of the 85 specimens analyzed, 60 were taken before treatment from a nearly consecutive group of diabetic patients with ketosis, 21 were follow-up specimens, and 4 were from nondiabetic patients with ketosis.
Results In the 85 specimens, the correlation between serum carbon dioxide and -OHB levels was -0.69, and that between anion gap and -OHB level was 0.75. For just the initial specimens, the respective correlation coefficients were -0.60 and 0.52.
Conclusions The correlations between serum -OHB and carbon dioxide levels and the anion gap were close, but not sufficiently so for the -OHB measurements to be routinely useful alone to assess the severity of the ketoacidosis. Full laboratory assessment of the severity and characteristics of ketoacidosis also requires knowledge of serum carbon dioxide level, anion gap, often blood pH, and ideally serum acetoacetate and lactate concentrations as well as serum -OHB concentration.
From the Jacobi Medical Center and Albert Einstein College of Medicine, Bronx, NY.
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