PU-4010 2-2
2-2-1 Handling Samples
2-2 Cautions in Measurement
BE CAREFUL WHEN HANDLING URINE.
This instrument uses urine as sample. Urine may be contaminated
by pathogenic microbes that can cause infectious diseases.
Improper handling of urine may cause infection to the user or other
individuals by pathogenic microbes.
IMPORTANT:
• Urine samples must be collected within one hour of use.
If samples cannot be tested within an hour, seal and keep them refrigerated. Leaving
samples at room temperature for 2 hours or more may alter the chemical composition of
the samples.
• Allow samples to adjust to the environment temperature.
Refrigerated samples must be brought to the environment temperature before testing.
Testing low temperature samples may result in low values. The temperature of samples
immediately after collection must adjust to the environment temperature. Testing high
temperature samples tends to produce higher test values.
• Mix each sample well before testing. Do not centrifuge samples.
Centrifuging may cause blood cells to precipitate, whereby producing incorrect results for
some testing items.
• Make sure sample is large enough to soak the entire pad area on the test strip in
the sample.
The instrument cannot perform testing with an insufficient amount of sample.
• Use samples as collected.
Do not add preservatives, disinfectants, or detergents.
• Do not expose samples to direct sunlight.
Direct sunlight can alter the quality of samples, whereby producing incorrect results.
• Samples containing ascorbic acid can affect testing results.
Testing samples with ascorbic acid can produce lower glucose and occult blood values
than actual levels.
• Ingested drugs and highly colored urine can affect measurement results.
Measurements of urine containing ingested drugs and highly colored urine can produce
incorrect results.
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