Question

Calculate the ARC, CRC, and RPI for a patient with 1.8% retic count, a Hct of 22%, and a RBC count of 3.5 x 10¹² L.

Calculate the ARC, CRC, and RPI for a patient with 0.2% retic count with a Hct of 34%, and a RBC count of 4.4 x 10¹² L.

Calculate the ARC, CRC, and RPI for a patient with 4.7% retic count with a Hct of 17, and a RBC count of 2.4 x 10¹² L.

Answer 1

1) Reticuloctye % = 1.8%

HCT = 22%

RBC = 3.5×10^12/L

#. ARC = Reticuloctye % /100 × RBC × 10^12

= 1.8 × 3.5× 10^ 12/L /100

= 0.063× 10^12/L

#. CRC = Reticuloctye % × HCT/0.45L/L

= 1.8 × 0.22/ 0.45

= 1.8 × 0.22 /0.45

0.88%

#. RPI = CRC/Maturation time of peripheral blood

* Considering maturation time of peripheral blood =2

= 0.88/2

= 0.44%

2) RETICULOCTYE % - 0.2%

HCT - 34%

RBC - 4.4×10^12/L

ARC = Reticuloctye % /100 × RBC × 10^12

= 0.2 × 4.4× 10^ 12/L /100

= 0.0088× 10^12/L

#. CRC = Reticuloctye % × HCT/0.45L/L

= 0.2 × 0.34/ 0.45

= 0.2 ×0.34 /0.45

= 0.15%

#. RPI = CRC/Maturation time of peripheral blood

* Considering maturation time of peripheral blood =2

= 0.15/2

= 0.07%

3) Reticuloctye %= 4.7%

HCT - 17

RBC - 2.4×10^12 /L

ARC = Reticuloctye % /100 × RBC × 10^12

= 4.7 × 2.4× 10^ 12/L /100

= 0.063× 10^12/L

0.11×10^12/L

#. CRC = Reticuloctye % × HCT/0.45L/L

= 4.7× 0.17/ 0.45

= 1.77%

#. RPI = CRC/Maturation time of peripheral blood

* Considering maturation time of peripheral blood =2

= 1.77/2

= 0.8%