Bayer HealthCare Rapidlab 800 User Manual
Page 403
4Ć115
Troubleshooting the System
Problem
Probable Cause and Solutions
Excessive Bubbles in
COox Sample
Excessive Bubbles in
COox tHb Slope
Excessive Bubbles in
Zero
The system detects a non-continuous fluid in the CO-ox sample
path.
1.
Ensure that you use proper sampling technique, as
described in Analyzing . . . Samples in Section 2. Analyze
the sample again or perform a pH/lytes one-point
calibration.
2.
Check the CO-ox sample tubing for leaks, cracks, crimps,
or loose connections, particularly at the inlet and outlet to
the sample chamber. See Replacing the CO-ox Sample
Tubing in Section 3.
3.
Check the bubble trap for large bubbles. Clean or replace
the bubble trap.
4.
Check for obstructions in the CO-ox sample path. See
Removing Obstructions from the CO-ox Sample Path in
Section 4.
5.
Check for clots in the hemolyzer. See Cleaning the
Hemolyzer in Section 3.
6.
Clean the sample chamber, as described in Cleaning the
Sample Chamber in Section 3.
Excessive Scatter in
COox Meas
Excessive scatter may be due to excessive lipids, unlysed cells
or particles, or an abnormally high tHb level in the CO-ox
sample. This message also appears if the hemolyzer is
disconnected.
1.
Check that the hemolyzer is assembled properly.
2.
Clean the hemolyzer, as described in Cleaning the
Hemolyzer in Section 3.
3.
Check the sample source. Do not use syringes with
carboxymethylcellulose. See Sample Collection Devices
and Anticoagulants in Section 1.
4.
Analyze a QC sample, which should not cause an
excessive scatter message.
5.
Clean the bubble and sample chamber, as described in
Cleaning the Sample Chamber in Section 3.
(Continued)