oops, i forgot i have a blood test in 4ish hours, and i wasnt suppose to eat 12 hours before hand. but i just had oatmeal
today was my only day free to go, they are testing for a goitre in my thyroid. do you know if it will really matter if i ate?
2007-09-25 20:39:18 · 11 answers · asked by Anonymous in Health ➔ Other - Health
A thyroid function test requires you to fast.
That's why you were not asked to eat.
It can change the results of the test. Giving false information.
You are going to have to reschedule the appointment.
It can happen to anyone.
2007-09-25 20:47:44 · answer #1 · answered by I do care! 7 · 0⤊ 0⤋
I have uderactive thyroid, and have to have blood tests 3 or 4 times a year and it does not require me to be fasting. But, I am not familiar with tests of the goitre, so be sure and tell or ask the tech taking the test if you should reshedule your appointment or not, since you have eaten in the past 12 hours.
2007-09-26 04:00:00 · answer #2 · answered by sixpack 2 · 1⤊ 0⤋
For a Radioactive Iodine Uptake test- blood tests may be done to measure the amount of thyroid hormones (TSH, T3, and T4) in your blood.
To prepare for an RAIU test, do not:
Eat for 2 hours before the test.
Take any antithyroid medicine for 5 to 7 days before the test
Why It Is Done
A radioactive iodine uptake (RAIU) test is done to:
Find the cause of an overactive thyroid gland (hyperthyroidism).
Plan treatment for hyperthyroidism or a thyroid lump (thyroid nodule).
See whether thyroid cancer has spread to other areas of the body
Results
A radioactive iodine uptake (RAIU) test uses a radioactive tracer and a special probe to measure how much tracer the thyroid gland absorbs from the blood. The radioactive tracer used in this test is iodine. An RAIU test is done to check for thyroid gland problems, such as hyperthyroidism.
Radioactive thyroid scan and radioactive iodine uptake test (RAIU)
Normal: The amount of radioactive tracer in the thyroid gland is normal. An RAIU test measures the amount of tracer taken up by the thyroid gland at certain times after the tracer is given. The measured amount of radioactive tracer in the thyroid gland at each one of these times is at normal levels
.
Abnormal: The test shows either more or less uptake of tracer than normal in the thyroid gland. The uptake may be even or uneven. If hyperthyroidism is present, abnormal test results may mean certain conditions are present.
A low uptake of tracer by the thyroid gland may mean that hyperthyroidism is caused by inflammation of the thyroid gland (thyroiditis), taking too much thyroid medicine, or another rare condition.
What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
Taking thyroid medicine.
Eating foods with iodine, such as shellfish, iodized salt or kelp.
Having other tests using contrast materials in the past 4 weeks.
A high uptake of tracer spread evenly in the thyroid gland may mean that hyperthyroidism is caused by conditions such as Graves' disease.
An uneven spread of tracer in the thyroid gland (with either low or high areas of uptake) may mean that hyperthyroidism is caused by a multinodular goiter or a noncancerous (benign) tumor called a toxic nodule
2007-09-26 03:57:15 · answer #3 · answered by rosieC 7 · 0⤊ 0⤋
For the very true results, it is always better to have done the blood test before eating.
2007-09-26 03:49:11 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Surely will. You ought to reschedule. Or, at least, let the tech know that you arent fasting at the time of the draw.
2007-09-26 03:44:48 · answer #5 · answered by MHnurseC 6 · 2⤊ 0⤋
if it's a fasting blood test then yes it will affect the results, sorry
2007-09-26 03:42:09 · answer #6 · answered by h b 4 · 1⤊ 0⤋
yes it does sorry. eating food effects the outcome of the results. you'll just have to reschedual it.
2007-09-26 03:42:03 · answer #7 · answered by maddy 2 · 1⤊ 0⤋
Yes it does matter.
2007-09-26 03:47:25 · answer #8 · answered by Anonymous · 1⤊ 0⤋
yes it does
2007-09-26 05:02:01 · answer #9 · answered by Tundra V 2 · 0⤊ 0⤋
you will be fine dilute it with lots of water and gatorade...
2007-09-26 03:42:18 · answer #10 · answered by Sandy B 5 · 0⤊ 1⤋