一位治療不順從的 58 歲第二型糖尿病男性向護理師炫耀：「我禁食 12 小時血糖 95 mg/dL，我糖尿病好了！」但他的 HbA1c 是 11.5%。護理師必須了解 HbA1c 的什麼事實？
A 58-year-old male with non-compliant Type 2 diabetes boasts to the nurse, 'I fasted 12 hours and my fingerstick is 95 mg/dL—my diabetes is cured!' His HbA1c is 11.5%. Which fact about HbA1c must the nurse understand?
- AHbA1c reflects pancreatic insulin synthesis over the past 24 hours.HbA1c 反映過去 24 小時內胰臟的胰島素合成情況。
- BAn HbA1c of 11.5% is within the target range for a chronic diabetic.11.5% 的 HbA1c 值在慢性糖尿病患者中屬於目標範圍。
- CHbA1c reflects average blood glucose control over the past 2-3 months (90-120 days) and cannot be falsified by short-term fasting.✓ 正解HbA1c 反映過去 2-3 個月（90-120 天）的平均血糖控制情況，無法通過短期禁食來偽造。
- DA normal fasting glucose overrides the HbA1c value.正常的空腹血糖值會蓋過 HbA1c 數值。
糖化血紅蛋白（HbA1c）反映過去 2-3 個月平均血糖。葡萄糖會與紅血球血紅素永久糖化，紅血球壽命約 120 天，故 HbA1c 是 90-120 天平均血糖的可靠指標。 選項 C 正確：短期禁食只能影響當下血糖，無法改變 HbA1c。糖尿病控制目標 HbA1c < 7%；11.5% 屬嚴重失控。 選項 A 錯誤：HbA1c 反映糖化結果，非胰島素合成。 選項 D 錯誤：HbA1c 反映長期狀況，不被當下血糖覆蓋。 選項 B 錯誤：11.5% 嚴重超標。
HbA1c reflects average blood glucose over the past 2-3 months because glucose irreversibly glycates hemoglobin and RBCs live ~120 days. It cannot be falsified by short-term fasting. C correct: Target HbA1c is <7% for diabetes; 11.5% indicates severe poor control. A incorrect: HbA1c reflects glycation, not insulin synthesis. B incorrect: HbA1c reflects long-term control, not overridden by current glucose. D incorrect: 11.5% is far above target.
「HbA1c = 暴露過去 2到3 個月 (120天紅血球壽命) 的騙局血糖」。這項無情戳破糖尿病患者看診前一天餓肚子假象的衛教標竿，是全地球無分國界的基層護理考試起手式。