Microcytosis (Micro) - Siemens ADVIA 2120 Operator's Manual

Sample Related
•
Macrocytic anemia
•
Alcoholism
•
Hemolytic anemia
•
Myelodysplastic anemia
•
Neonatal samples

Microcytosis (MICRO)

Definition
The Microcytosis flag is triggered if the percentage of red blood cells with lower
than normal cell volumes (%MICRO) is equal to or greater than 2.5%.
The %MICRO parameter indicates the percent of red blood cells that have a
volume equal to or lower than 60 fL and is derived from the RBC volume
histogram.
Default trigger values for the three severity levels are:
+
++
+++
The %MICRO value is intended for flagging and laboratory purposes only.
Results Flagged
none
Possible Causes
The following list of sample-related causes may not contain all conditions that
could cause this flag.
Multiple occurrences of this flag, especially for consecutive samples, can indicate
a system problem. However, isolated instances of this flag are usually sample
related.
Sample Related
•
Iron deficiency anemia·
•
Hemoglobinopathies·
•
Hemolytic anemias
6-14
%MICRO = 2.5% to 6.4%
%MICRO = 6.5% to 10.5%
%MICRO > 10.5%
System Related
1. Check the RBC reagents.
2. Check the RBC hydraulics.
3. Check the RBC gains.
4. Check the laser flowcell alignment.
System Related
1. Check the RBC reagents.
2. Check the RBC hydraulics.
3. Check the RBC gains.
4. Check the laser flowcell alignment.
Flags