What are the limitations of a bedside glucometer monitoring in IV insulin therapy?

Updated: Nov 06, 2018
  • Author: Guy W Soo Hoo, MD, MPH; Chief Editor: George T Griffing, MD  more...
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The need for rapid testing in critically ill patients has spawned multiple bedside, point-of-care devices, and none is more pervasive in the ICU than the bedside glucometer. [8] Accuracy is reduced, with standards requiring only an agreement of ±20% with laboratory analysis. The glucometers are most accurate in hemodynamically stable patients with glucose readings in the normal range, but disagreement with laboratory readings are more pronounced with glucose readings at the high and low end of the spectrum (hyperglycemia and hypoglycemia) and in conditions of poor tissue perfusion (eg, critically ill patient subject to shock, peripheral edema, vasoconstriction).

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