LeadCare
®
II User's Guide 5-2
Troubleshooting Results Below the Target or Expected Value
Possible causes include:
• Less than 50 µL of blood was transferred to the treatment reagent tube.
• Analyzer is not calibrated properly.
• The sample is cold.
• The sensor is not inserted properly.
See detailed precautions below:
Blood Sampling
• Less than 50 µL in the capillary tube will lower blood lead level results.
• Make sure that there are no clots or bubbles in the tube.
• Use only fresh, whole blood from patients collected in heparin or EDTA. Do NOT
use plasma or serum.
Blood Sample Preparation
• Every sample must be mixed in treatment reagent. You cannot test untreated
whole blood.
Equipment Setup, Calibration and Testing Materials
• Check the expiration date on the test kit box. Do NOT use a test kit that is beyond
the expiration date. When calibrated properly, the analyzer will not initiate a test
with expired sensors.
• Make sure the analyzer is calibrated properly. Use the calibration button supplied
with the test kit you are using. When processing the sample verify the code on the
analyzer screen matches the code of the of the sensor lot in use.
Testing Conditions
• Operate the analyzer only within the specified humidity range: (12 to 80% Relative
Humidity).
• Avoid operating the LeadCare II System in drafts or in locations with low humidity.
• Make sure that the analyzer and the test kit are maintained at a constant
temperature. If you move any part of the system from one place to another (for
example, from outside into a laboratory) wait for the analyzer and kit components
to reach a stable temperature.
User Technique
• Make sure the sample/treatment reagent mixture is room temperature before
placing it onto a sensor. This is only relevant when testing samples that were
previously mixed with treatment reagent and stored refrigerated.
• Make sure the blood and treatment reagent is thoroughly mixed before placing it
onto the sensor. The mixture should appear brown, confirming that the red blood
cells have been lysed.
• Make sure the sensor is inserted under the sensor guides and sits flush on the
sensor deck.
• Do NOT touch the sensor while the analyzer is running a test.
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