Monday 9 November 2015

Iron deficiency anemia | PGI Frequently Asked Medical PG topics

Which of the following is true in iron deficiency anemia?

A. In 300 mg elemental iron given, 100mg gets absorbed
B. Reticulocytosis appearsin one to 2 weeks and then peaks in 3-4 weeks
C. Response to Rx seen in 4 weeks.
D. Decreased in absorption with improvement of symptoms.
E. Stop the Rx after normalizing the Hb



Ans. D. Decreased in absorption with improvement of symptoms ;

* The average iron absorption in adult male is 6%, in female it is 12%, but in iron deficiency can  increase iron absorption in about 20% for meat iron and five to 10% for vegeterian diet. Therefore 300 mg of elemental iron given, only 30mg will be absorbed. With rise of hemoglobin, iron absorption is decreased and erythropoietin stimulation also decreases.
* Typically reticulocyte count should begin to increase with 4 to 7 days after initiation of therapy and peak at 1½ week.
* An appropriate response is a return of hematocrit level half way towards the normal within 3 weeks with full return to baseline after 2 months. Iron therapy should be continued for 6-12 months after restoration of normal hematological values in order to replenish iron stores.