DIABETES MELLITUS-PRE DIABETES INX

SUMMARY

1. Whole blood glucose values are about 15% less than serum/plasma values.

2. Finger sticks are acceptable for self-monitoring of known diabetics, but only plasma/serum should be used for diagnosis of DM.

3. Normal FPG < 100mg/dL.

4. Impaired fasting glucose (IFG): FPG 100-125 mg/dL.

5. Impaired glucose tolerance (IGT): 2-hr plasma glucose of 140-199 mg/dL after a 75-gm oral glucose load (OGTT). This is more sensitive than FPG.

6. HbA1c 5.7-6.4% is supportive of pre-diabetes; retest patients with results in this range using the FPG/OGTT.

Reference(s)

Wilkinson, I., Furmedge, D. and Sinharay, R. (2017). Oxford handbook of clinical medicine. Oxford: Oxford University Press. Get it on Amazon.
Feather, A., Randall, D. and Waterhouse, M. (2020). Kumar And Clark’s Clinical Medicine. 10th ed. S.L.: Elsevier Health Sciences. Get it on Amazon.
Hannaman, R. A., Bullock, L., Hatchell, C. A., & Yoffe, M. (2016). Internal medicine review core curriculum, 2017-2018. CO Springs, CO: MedStudy.
Therapeutic Guidelines. Melbourne: Therapeutic Guidelines Limited. https://www.tg.org.au [Accessed 2021].