Abbott CELL-DYN 3200 System Operator's Manual page 141

Section 4
Background Counts
Carryover
CELL-DYN ® 3200 System Operator's Manual
9140181H—October 2001
Background counts for the following parameters are acceptable up to the limits
listed:
WOC <0.10 K/µL
NOC <0.10 K/µL
RBC <0.02 M/µL
HGB <0.10 g/dL
PLT <5.0 K/µL
RETIC <100 counts/count cycle
Carryover is the degree of influence the previous sample has on the next sample
and is expressed as a percent. Fresh whole blood samples that are used to verify
carryover specifications should have results that fall within each laboratory's
reference interval (normal range). Each sample is run in triplicate followed by three
background cycles.
The percent carryover for CBC parameters, as shown in Table 4.6, is calculated
using the following formula:
% Carryover =
Absolute Carryover = Background
Table 4.6 Carryover for WOC, NOC, RBC, HGB, and PLT
Parameter
WOC
NOC
RBC
HGB
PLT
Performance Characteristics and Specifications
Performance Specifications
Background Background
-
1
Sample
Background
-
3
- Background
1
Specimen Range
µL
4.1–11.0 x K/
µL
4.1–11.0 x K/
µL
4.0–6.0 x M/
dL
12.1–17.0 g/
µL
150.0–400.0 x K/
3
X 100
3
3
Carryover
µL
< 1% or 0.1 K/
µL
< 1% or 0.1 K/
µL
< 1% or 0.03 M/
dL
< 1% or 0.1 g/
µL
< 1% or 6 K/
4-9