Second red cell sorting ratio, the Sehgal index
Another sorting sum built from red cell size and red cell count.
What it measures
Another calculation from red-cell size and count used to sort small-cell anaemias.
Nothing in the body; like the Mentzer index it is a sorting rule, and it has no agreed adult reference band.
Why it matters for how long you stay well
It has not been tested across populations the way the Mentzer index has, so read it as a footnote beneath that one rather than as a finding of its own.
How it shows up in daily life
It is arithmetic on numbers you already have, offered as a second opinion on the same question.
High and low readings
When it reads high
Read it only alongside haemoglobin, red-cell size and iron studies.
When it reads low
Read it only alongside haemoglobin, red-cell size and iron studies.
How to read itA second screening arithmetic on the same blood count, read only when haemoglobin or red-cell size is low; on a normal count it adds nothing beyond the Mentzer index.
What moves it
Daily life
- iron stores
- an inherited small-cell trait
Common questions
What does Sehgal Index measure?
Another calculation from red-cell size and count used to sort small-cell anaemias. Nothing in the body; like the Mentzer index it is a sorting rule, and it has no agreed adult reference band.
What does a high Second red cell sorting ratio result usually mean?
Read it only alongside haemoglobin, red-cell size and iron studies.
What does a low Second red cell sorting ratio result usually mean?
Read it only alongside haemoglobin, red-cell size and iron studies.
Is there a reference range for Second red cell sorting ratio?
There is no standalone band. A second screening arithmetic on the same blood count, read only when haemoglobin or red-cell size is low; on a normal count it adds nothing beyond the Mentzer index.
Educational only, not a diagnosis. A single number means little without your history and the rest of your panel, so discuss your own results with your physician.
Typical adult reference band
No standalone band; read it with the markers named on this page.
Labs differ. The band printed on your own report is the one that applies to your result.
Reported in Index Value
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