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Reticulocyte Production Index (RPI) 計算機

Corrected Reticulocyte Count (CRC) =
Reticulocyte (%) x (Hct / 45) or (Hb / 15)

Reticulocyte Production Index (RPI) =
Corrected Reticulocyte Count / Maturation time

Maturation time :
Hct ≤ 15 : 2.5
16 < Hct ≤ 25 : 2
26 < Hct ≤ 35 : 1.5
35 < Hct : 1







※ 本計算機假設正常成人Hct為45%。

  • Reticulocyte : 周邊血液中reticulocyte的數量反映造血狀態。
  • Corrected Reticulocyte Count : 當Hb降低時,reticulocyte相對看起來增加,Corrected Reticulocyte Count對此進行校正。
  • Reticulocyte Production Index (RPI) : 當造血增加時,erythroid cell以未成熟狀態釋放到周邊血液中,延長了它們作為reticulocyte存在的時間。Reticulocyte Production Index對此進行校正。
    • 在貧血患者中,RPI 2.5以上提示溶血(Hemolysis)或失血(Bleeding)。(然而,RPI低於2.5並不能排除溶血和失血。)
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Harrison's internal medicine (20/e)