Macrocytosis (Macro) - Siemens ADVIA 2120 Operator's Manual

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
•
Aged samples
•
Chronic infections
•
Myeloproliferative
disorders·
•
Neonatal samples

Macrocytosis (MACRO)

Definition
The Macrocytosis flag is triggered if the percentage of red blood cells with
higher than normal cell volumes (%MACRO) is equal to or greater than 2.5%
The %MACRO parameter indicates the percent of red blood cells that have a
volume equal to or greater than 120 fL and is derived from the RBC volume
histogram.
Default trigger values for the three severity levels are:
+
++
+++
The %MACRO 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.
Flags
%MACRO = 2.5% to 6.4%
%MACRO = 6.5% to 10.5%
%MACRO > 10.5%
System Related
1. Troubleshoot the baso channel.
2. Troubleshoot the perox channel.
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