Help with RAST Testing!

Posted on: Sat, 01/12/2008 - 8:31am
ctmartin's picture
Joined: 07/30/2007 - 09:00

Hi, Everyone,

Like some of you, we aren't too thrilled with our local allergist who, on our first visit following my daughter's reaction to peanut, skin prick tested her for peanuts (um, i think we know the answers to that one!) as well as milk, soy, wheat, etc, all of which she has consumed with no problem. Needless to say, we were very disappointed she did a skin test for peanuts (isn't that an exposure? doesn't she know that??), and didn't do a RAST with more comprehensive testing of things we REALLY wanted to know about (e.g. tree nuts)

We are now in the process of having our pediatrician write a scrip for a RAST, to be performed at a lab. When I tried to explain to the nurse that we wanted to specify what she is tested for, she went ahead and just had the doctor write the scrip for a regular immunocap (top allergens), which we have essentially already had through the SPT (nice wasted trip to the doc picking that up).

So, needless to say, when I went to the lab, they said I needed to go back to the doc and have him specify what we want. Has anyone else had a similar experience, and if so, did you just pick what you wanted your child/yourself tested for? What did you base your choices on? I would be interested in hearing what some of you chose.

Thanks for reading!

Posted on: Sat, 01/12/2008 - 12:28pm
lj's picture
Joined: 01/26/2006 - 09:00

When we have our son RAST tested, our dr provides the lab with a huge checklist of possible things to be tested for and he checks off what he wants. For ex, each tree nut is listed separately as well as fruits, environmental allergens, different fish/shellfish. Maybe you could ask the lab for a possible list and check off what you would like?

Posted on: Sat, 01/12/2008 - 10:09pm
ctmartin's picture
Joined: 07/30/2007 - 09:00

Hi, lj,
Thanks for your response! Is this your pediatrician or your allergist that does this? B/C i think that might be a little outside our pediatrician's scope (? since they didn't do it the first time, even though that is what i asked for ?)
Maybe I should call our allergist for the scrip??

Posted on: Sun, 01/13/2008 - 6:19am
lilpig99's picture
Joined: 12/22/2005 - 09:00

You may be wanting the "Childhood allergy profile #10659". Tests for top foods and environmentals.

Posted on: Mon, 01/14/2008 - 1:59am
kandebuttahfly's picture
Joined: 12/27/2007 - 17:08

Can someone translate RAST, SPT, etc., into english for a newbie?

Posted on: Mon, 01/14/2008 - 5:06am
niche's picture
Joined: 02/05/2007 - 09:00

For my son who I basically had been feeding everything but nuts when I found out about his allergies, I only request things he hasn't had (treenuts seeds). for my Daughter whom I have tested because of her brothers allergies, I test her for top 8 plus seaseme. If I had a kiddo who was reacting and I wasn't sure to what that would be harder, I would try to narrow with a food diary as much as possible and go from there.
Rast Refers to the blood test where they look for Ige to a certain food and SPT is the Skin Prick test where the put a bit of the food in the skin to watch for reactions - typically hives.

Posted on: Wed, 01/16/2008 - 8:48am
GinaC's picture
Joined: 11/11/2006 - 09:00

Since you already have the top eight covered, I add in sesame since that really should be number 9. I'd also add mustard. Between my website and local support group, I have seen and heard of so many who have mustard. Green peas might be something too.
Scott Sicherer, MD did a study about the chances of reacting to other legumes when peanut allergic and the probability was low--about 5% but that didnt hold true at all in our case ,and in others I know. (although when you run a support group, you tend to attract the more serious cases of people who really need help)
On the other hand, if you are not dealing with other signs of atopy, you may not need to go much further with testing. But if youre dealing with eczema, asthma, reflux, ear infections etc then you may have a very allergic child rather than one who is "just" allergic to peanuts. (believe me, I am in no way makign light of this, just trying to help you assess your situation)
Good Luck!

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