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A simple intravenous glucose tolerance test for assessment of insulin sensitivity

Hahn, Robert (author)
Karolinska Institutet,Östergötlands Läns Landsting,Linköpings universitet,Anestesiologi med intensivvård,Hälsouniversitetet,Anestesi- och operationkliniken US
Ljunggren, Stefan (author)
Karolinska Institutet
Larsen, Filip (author)
Karolinska Institutet
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Nystrom, Thomas (author)
Karolinska Institutet
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 (creator_code:org_t)
2011-05-02
2011
English.
In: Theoretical Biology and Medical Modelling. - : BioMed Central. - 1742-4682. ; 8:12
  • Journal article (peer-reviewed)
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  • BackgroundThe aim of the study was to find a simple intravenous glucose tolerance test (IVGTT) that can be used to estimate insulin sensitivity.MethodsIn 20 healthy volunteers aged between 18 and 51 years (mean, 28) comparisons were made between kinetic parameters derived from a 12-sample, 75-min IVGTT and the Mbw (glucose uptake) obtained during a hyperinsulinemic euglycemic glucose clamp. Plasma glucose was used to calculate the volume of distribution (Vd) and the clearance (CL) of the injected glucose bolus. The plasma insulin response was quantified by the area under the curve (AUCins). Uptake of glucose during the clamp was corrected for body weight (Mbw).ResultsThere was a 7-fold variation in Mbw. Algorithms based on the slope of the glucose-elimination curve (CL/Vd) in combination with AUCins obtained during the IVGTT showed statistically significant correlations with Mbw, the linearity being r2 = 0.63-0.83. The best algorithms were associated with a 25-75th prediction error ranging from -10% to +10%. Sampling could be shortened to 30-40 min without loss of linearity or precision.ConclusionSimple measures of glucose and insulin kinetics during an IVGTT can predict between 2/3 and 4/5 of the insulin sensitivity.

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