Performance Characteristics: Precision - Siemens ADVIA 2120 Operator's Manual

Parameter
MN (cells/μL)
PMN (cells/μL)

Performance Characteristics: Precision

Within run precision on the ADVIA 120 CSF Assay was evaluated by
performing replicate aspirations of 16 CSF patient samples with adequate
volume. Volume permitting, CSF samples were aspirated 2–10 times. Results
from the 16 samples were pooled giving a total sample size of n=65.
Precision of CSF WBC Counts (n=65)
Parameter Mean
WBC
Precision of CSF RBC Counts (n=65)
Parameter Mean
RBC
Precision of CSF WBC Differential (n=65)
Parameter
% Neut
% Lymph
% Mono
% MN
% PMN
# Neut
# Lymph
# Mono
# MN
# PMN
Regulatory Information
Expected
Value
0-10
0-4
SD
44.6 5.0
SD
12.9 4.1
Mean SD
12.5 3.2
74.9 5.1
8.3 3.2
83.2 3.6
16.8 3.6
4.8 1.1
33.8 4.0
4.1 1.2
37.9 4.7
6.6 2.0
CV
11.2
CV
31.7
CV
25.5
6.9
39.3
4.3
21.2
23.6
11.7
30.1
12.4
29.9
9-41