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Troubleshooting of Inaccurate Results
Scenario 1: Troubleshooting results below the target or expected value
• Make sure the analyzer is calibrated to the sensor lot in use.
• Make sure the sensor is inserted under the sensor guides and sits ush on the sensor deck.
• Check the expiration date on the test kit box. Do NOT use a test kit that is beyond the
expiration date. Note: the analyzer will not perform a test when it is calibrated for a
sensor lot that has expired.
• Use only fresh, whole blood from patients. Do NOT use plasma or serum.
• Less than 50 µL in the capillary tube will tend to produce lower blood lead results.
• Make sure that there are no clots or bubbles in the capillary tube.
• Always mix the blood sample with treatment reagent. Results generated with
untreated blood are not accurate.
• Do NOT use clotted blood. If there are clots in the blood, obtain a new sample.
• Operate the analyzer only within the specied humidity range – 12 to 80% relative
humidity.
• Make sure that the analyzer, test kit, and sample are all at the same temperature
before testing. Note: The analyzer will not initiate a test if the temperature is changing
too rapidly, or if the temperature is outside of the operating range.
• Avoid operating the LeadCare II System in drafts.
• Make sure the blood and treatment reagent are thoroughly mixed before placing
onto the sensor.
• Keep the lid on the sensor container closed to protect unused sensors.
• Do NOT touch the sensor while running a test.
Scenario 2: Troubleshooting results above the target or expected value
• To avoid contamination of the skin’s surface, wash patient’s hands thoroughly with
warm soapy water prior to collecting a ngerstick sample. Use clean gloves during
testing and keep your gloved hands clean.
• Make sure the analyzer is calibrated to the sensor lot in use.
• Check the expiration date on the test kit box. Do NOT use a test kit that is beyond the
expiration date.
• Make sure you are using lead-free collection devices.
• Do NOT touch the ends of the capillary tubes or the plungers. This could cause
contamination.
• Excess blood on capillary tube. Be sure to wipe excess blood from the tube with a
downward motion. The accuracy of the test depends on lling the capillary tube with
50 µL. Excess blood on the outside of the tube may produce higher blood lead results.
• Do NOT use clotted blood. If there are clots in the blood, obtain a new sample.
• Do NOT leave the treatment reagent tube uncapped other than to add the blood
sample and remove the blood sample/treatment reagent mixture.
• Make sure to thoroughly mix blood with the treatment reagent. The mixture should
turn brown before you place it on the sensor.
• Operate the analyzer only within the specied humidity range – 12 to 80% relative humidity.
• Make sure that the analyzer, test kit, and sample are all at the same temperature
before testing.
• Do NOT use a sensor that has been dropped on the oor or exposed to contaminants.
• Do NOT touch the sensor while running a test.
Troubleshooting
If, after following the instructions, the problem persists, call Product Support.