There are several tests done for thyroid function. They require different tubes.
Gold (Corvac)
-HM3(EXW)
Sst thexotropic gel separator
Tiger Top
Red
green
sst
Gold
sst
red
Red
yellow
Lavendar
Each test has a specific color tube.
EDTA tube or lavender tube
what color tube to draw HepB titer blood test
tiger
Gray tube
Purple tube.
It depends on the test - each test has a different type of test tube top.
A test tube with a red top is used for hcg testing.
SST tube (yellow color)