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 Post subject: Confusing RAST results
PostPosted: Mon Dec 10, 2012 9:50 pm 
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Joined: Mon Dec 03, 2012 6:51 pm
Posts: 3
My RAST results for latex was .13 KU/L which my allergist called a high class 1/ low class 2. I have had anaphylatic reactions before for latex, so it is definitely positive. The scale on my test results goes:

.08-.15 class 1
.16-.50 class 2
.51-2.5 class 3
2.51-12.5 class 4
12.51- 62.5 class 5
62.51- 100+ class 6

This scale is different than some RAST scoring guided I've seen. The ones I've seen online starts a class 1 at .35 KU/L. Is the scoring different for different allergens or is this just erring on the safe side?

_________________
Allergic to: Latex, resulting in allergies to banana, avocado, kiwi, and melon.


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PostPosted: Thu Dec 13, 2012 1:44 pm 
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Joined: Tue Jun 26, 2007 2:45 pm
Posts: 790
Location: Vancouver, BC
Hopefully someone who knows a lot can chime in, but I am confused as there are different types of blood tests, including RAST and IgE, and I believe the results are read slightly differently. I had thought previously that the terms were interchangeable, but they are not.

My children had 'Specific IgE' tests done, and the table says:

Under .35 KU/L undetectable
.36 - .69 Low
.70 - 3.49 Moderate
3.5 - 17.49 High
Over 17.5 Very High

My kids were tested for peanuts, tree nuts and egg.

Perhaps the charts you saw online were for IgE, as my chart starts at .35?

_________________
DD 2004 Allergy to peanuts, egg, sesame, and new: lentils and chick peas
DS 2006 Allergy to peanuts, tree nuts, milk, egg, kiwi fruit, eczema


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