Table 1—

Capillary forearm BG compared with the first hypoglycemic value (BG ≤3.5 mmol/l) at the fingertip

Blood glucose (mmol/l)
Clinical symptoms of hypoglycemia
Forearm BG monitorFingertip
BG monitorCC-lab
9.4S3.5S4.2Drowsiness
9.0S3.3S3.4None
8.8F2.9FNDNone
8.4F3.1F3.4None
7.9F2.8FNDNone
6.6S3.5SNDVisual disturbance, warmth
6.4U3.0U2.9None
6.2F3.1FNDHunger, drowsiness
5.9U3.4U2.8Sweating, tremor
5.9F2.4F2.2Hunger, drowsiness, dizziness
5.8F3.3FNDDrowsiness
5.0F2.2F1.8Sweating, nausea
4.5F2.6F2.7None
4.1F2.6FNDNone
3.9S3.1S3.2None
  • Additional capillary blood samples from the fingertip were analyzed using a clinical chemistry laboratory method. Clinical symptoms of hypoglycemia are given according to patients’ perception. Hypoglycemia was not reached in two patients (data not displayed). CC-lab, clinical chemistry laboratory; ND, not done; S, Soft-Sense; F, FreeStyle, U, One Touch Ultra;

  • known history of impaired awareness of hypoglycemia.