Short-term evaluation of an electro-chemical system (ExacTech) for blood glucose monitoring.
114 venous blood samples (plasma glucose ranging between 2.6 and 30.7 mmol/l) were measured by a new pen-sized glucose meter designed for blood glucose self-monitoring working with an electro-chemical method. Glucose readings of three pen-meters were compared with plasma glucose measurements obtained from a standard glucose-oxidase-method. Precision, accuracy and clinical relevance were determined by assessment of the agreement between the two methods and error grid analysis. The mean differences between the pen-meters' blood glucose readings and plasma glucose were -1.35, -1.43 and -1.56 mmol/l, with limits of agreement (+/- 2 SD) of 2.2 and -4.9, 2.1 and -5.0 and 2.0 and -5.1 mmol/l, respectively. The 57 samples in the clinically relevant range, i.e., with plasma glucose concentrations below 13 mmol/l showed mean differences of -0.04, -0.10, and -0.04 mmol/l, with limits of agreement between -1.08 and 1.00 mmol/l, respectively. Error grid analysis showed that 90.7, 95.4, and 91.9% of the respective pen-meter readings fell in the zone A, i.e., gave clinically accurate results, the remaining values fell in zone B. One pen-meter broke during the study and had to be replaced. The results confirm that this new device gives accurate and reproducible measurements--faultless technical function provided--and, compares favorably with the well-established reagent strips for blood glucose self-monitoring.
Ross
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Department of Nutrition and Metabolic Diseases, Heinrich Heine, University of Düsseldorf, F.R.G.
Heinemann
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L
Chantelau
E A
EA
D015374:Biosensing Techniques; D001786:Blood Glucose / Q000032:analysis*; D015190:Blood Glucose Self-Monitoring / Q000295:instrumentation* / Q000379:methods; D003920:Diabetes Mellitus / Q000097:blood*; D006801:Humans; D012016:Reference Values; D012044:Regression Analysis
D001786:Blood Glucose