Idexx VetTest, Operator'S Manual

Page: 43 / 132

E–3
Advanced Operations
To prepare dilutions greater than 1:1:
If additional dilutions beyond 1:1 are necessary, always begin with the original,
undiluted sample. Then, incrementally increase the parts saline as indicated in the
dilution chart.
Urine Dilutions
The VetTest analyzer supports urine dilutions when either the UPRO or UCRE test value
is outside the linearity range of the VetTest analyzer.
Note: Only the test value that is outside linearity needs to be diluted, not the entire
ratio.
Urine Dilution Tips
Perform a dilution only when a test value is accompanied by a greater than symbol
t
PSEBTIFT POUIFQBUJFOUSFQPSU
Use the deionized (DI) water supplied with the Urine P:C Sample Preparation Kit
t
as the diluent.
For best results, start with a 1:1 dilution (1 part sample to 1 part DI water). t
Do not exceed 10 parts DI water. t
Use an accurate measuring device, such as a calibrated pipette or syringe.
t
Urine Dilution Chart
Volumes are for example only. Parts Parts DI Water = Total Parts
Parts Sample Parts DI Water Total Parts (Dilution Factor)
Ú- 0 1
Ú- Ú-
2
Ú- Ú- 3
Ú- Ú-
Ú- Ú-
Ú- Ú-
Ú- Ú-
Ú- Ú-
8
Ú- Ú-
Ú- Ú-
10
Ú- Ú-
11
Parts DI Water: the number entered into the VetTest when running the diluted sample
Dilution Factor: the total number of parts in the diluted sample; the VetTest automatically multiplies the result
by this number to correct for the dilution