dawn phenomenon

dawn phe·nom·e·non

abrupt increases in fasting levels of plasma glucose concentrations between 5 and 9 AM, in the absence of antecedent hypoglycemia; occurs in diabetic patients receiving insulin therapy.

dawn phenomenon

Etymology: ME, daunen + Gk, phainomenon, anything seen

a tendency for persons with type 1 diabetes mellitus to experience hyperglycemia upon awakening in the morning because of increased cortisol and growth hormone secretion in the predawn hours. Compare Somogyi effect (phenomenon).

Early morning hyperglycemia not preceded by hypoglycemia, linked to increased insulin requirements in type 1 DM, possibly due to nocturnal pulses of hGH; DP also occurs in insulin-pump users receiving continuous subcutaneous insulin infusion who are presumed to be euglycemic. The phenomenon is attributed to residual endogenous insulin or insulin-like molecules

dawn phenomenon

Diabetology Early morning hyperglycemia not preceded by hypoglycemia, linked to ↑ insulin requirements in type 1 DM, possibly due to nocturnal pulses of hGH; DP also occurs in insulin-pump users receiving continuous subcutaneous insulin infusion, who are presumed to be euglycemic; DP is attributed to residual endogenous insulin or insulin-like molecules. Cf Somogyi phenomenon, Subcutaneous insulin resistance syndrome.

dawn phe·nom·e·non

(dawn fĕ-nom'ĕ-non)

Abrupt increases in fasting levels of plasma glucose concentrations between 5-9 am in the absence of antecedent hypoglycemia; occurs in diabetic patients receiving insulin therapy.

dawn phenomenon

A sharp rise in the blood sugar level in the early morning in insulin-dependent diabetics. The rise is thought to be caused by nocturnal growth hormone secretion.