Heel stick blood sample
There is very little risk
of a problem from a heel stick. Your baby may get a small bruise at the puncture
Blood sample from a vein
There is very little chance of a problem from having blood drawn from a vein.
- Your baby may get a small bruise at the
puncture site. You can lower the chance of bruising by keeping pressure on the
site for several minutes.
- In rare
cases, the vein may become swollen after the blood sample is taken. This
problem is called phlebitis. You can use a warm compress
several times a day to treat this.
There are no risks linked with a
urine test for galactosemia. Removing the tape that holds the bag in place may
cause mild skin irritation.
A galactosemia test is a blood or urine
test that checks for the
enzymes that are needed to change galactose into
glucose, a sugar that your body uses for energy.
Galactose tests (blood or urine)
Negative (galactosemia is not
Positive (galactosemia is
The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.
Galactose-1-phosphate uridyltransferase (GPT) test (blood)
units per gram (U/g) of hemoglobin (1.19–1.84
milliunits per mole of hemoglobin [mU/mol Hb]): The person does not have
Less than 5 U/g of hemoglobin (less than
0.32 mU/mol Hb): The person has galactosemia.
5–18.5 U/g of hemoglobin (0.32–1.18 mU/mol
Hb): The person may be a
carrier of galactosemia and able to pass the disease
on to his or her child.