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Fractional Excretion of Electrolytes
Code
L340
Results
1-3 days
Country
US
Container
Red top or Serum seperator marked "SERUM"
Non-additive tube marked "URINE"
FT3 is typically a component of larger thyroid profiles used to evaluate the thyroid status of dogs. Of limited clinical utility alone. Maybe spuriously increased in the presence of T3 autoantibodies.
Free T-3
Code
T455
Results
2-3 days
Country
US
Container
Serum in red top or serum separator
Specimen
0.5 mL serum
Free T4 by Equilibrium Dialysis
Code
CT460
Results
2-6 Days
Country
CA
Container
Serum in red top or serum separator
Specimen
0.5 mL serum
Description
FT4 by Equilibrium dialysis.
Free T4 by Equilibrium Dialysis
Code
T460
Results
2-4 days
Country
US
Container
Serum in red top or serum separator
Specimen
0.5 mL serum
Free T4 by Equilibrium Dialysis Add-On
Code
ADD50
Results
2-3 days
Country
US
Container
Serum in red top or serum separator
Specimen
0.5 mL serum
Free T4 by Equilibrium Dialysis Add-On
Code
CADD50
Results
2-4 Days
Country
CA
Container
Serum in red top or serum separator
Specimen
0.5 mL serum
Description
The free T4 by equilibrium dialysis [(fT4(ED)] test is the gold standard for determining the non-protein-bound ("free"), biologically active portion of T4. The "free" T4 comprises less than 0.1% of the total amount of T4 in blood. This test includes a dialysis step, in which the serum is dialyzed across a semi-permeable membrane to separate protein-bound from non-protein-bound fractions of T4. After dialysis (dialysis takes 18 hours), the non-protein-bound ("free") T4 concentration is measured in the dialysate. The FT4 (ED) test is used as a confirmatory test in the diagnosis of hypothyroidism in dogs and hyperthyroidism in cats. This test should not be used alone but rather as an adjunct to Total T4 (in dogs and cats), in addition to potentially TSH. All results need to be interpreted in light of clinical signs.
Fresh Whole Body Necropsy
Code
86403
Results
3 weeks
Country
US
Container
Chilled whole body
Specimen
Chilled whole body
Description
A complete necropsy performed by a pathologist in our Fountain Valley, CA lab.