Abbott i-STAT 1 System Manual page 450

Method Comparison (mmHg)
PCO
IL BGE
n 62
Sxx 0.69
Syy 1.24
Slope 1.003
Int't -0.8
Sy.x 1.65
Xmin 30.4
Xmax 99.0
r 0.989
Factors Affecting Results*
Exposing the sample to air allows CO
and HCO and TCO to be under-estimated. The use of partial-draw tubes (evacuated tubes that are
3 2
adjusted to draw less than the tube volume, e.g., a 5 cc tube with enough vacuum to draw only 3 cc)
is not recommended for use with the i-STAT System because of the potential for decreased measured
PCO
results and calculated HCO
2
decreased PCO results. Care must also be taken to eliminate "bubbling" of the sample with a pipette when
2
filling a cartridge to avoid the loss of CO
Allowing blood to stand (without exposure to air) before testing allows PCO
decrease, which will cause HCO
For patients administered propofol (Diprivan®) or thiopental sodium (syn. thiomebumal sodium,
penthiobarbital sodium, thiopentone sodium, thionembutal, Pentothal Sodium®, Nesdonal Sodium®,
Intraval Sodium®, Trapanal®, and Thiothal Sodium
EG6+ and EG7+ cartridges, which are free from clinically significant interference at all relevant therapeutic
doses. i-STAT does not recommend the use of EC8+ cartridges for patients receiving propofol (Diprivan®)
or thiopental sodium.
* It is possible that other interfering substances may be encountered. These results are representative and your results may differ somewhat due to
test-to-test variation. The degree of interference at concentrations other than those listed might not be predictable.
PCO2 - 4
PCO
2 2
Radiometer ABL500
29
0.74
0.53
1.016
1.1
0.32
28
91
0.999
to escape which causes PCO
2
and TCO values. Under-filling blood collection tubes may also cause
3 2
in the blood.
2
and TCO to be over-estimated, due to metabolic processes.
3 2
Art: 714182-01R
to decrease and pH to increase
2
), i-STAT recommends the use of G3+, CG4+, CG8+,
7
to increase and pH to
2
Rev. Date: 01-Jul-13