<div class="FTQUOTE"><begin quote><i>Originally posted by: <b>AbbysMama</b></i>
Can anyone tell me how sweat tests are usually done, what I should expect at the appointment, etc.?
Em</end quote></div>
Hi Emily,
I can't help you with understanding why your doctor wants a sweat test since 2 mutations have already been identified in Abby. It is not uncommon for sweat testing to be ordered if only 1 mutation was found - in this case it would be to determine if she was a carrier or if she had CF. Now that you've had time for it to sink in, I would ask your doctor to explain his or her rationale for sweat testing.
Now, that being said, I <b>CAN</b> help you with information about what to expect during a sweat test...
Abby is 2 years old, so the will probably do the test on her forearm. If her forearm is not big enough, they will most likely use her thigh. Two electrodes and a small dose of a drug that induces sweating called "pilocarpine" will be placed on her arm/leg. A small electrical current will be delivered through the electrodes to help the pilocarpine stimulate sweat. This will not hurt Abby, but she may feel a slight "tingling" sensation.
After about 10 minutes, the current will be stopped and the electrodes will be removed. A piece of filter paper covered in plastic will be placed on the test site, and from there you will just wait (usually 30-45 minutes) until there is enough sweat on the paper to test.
Hope that helps.