I ask this question after a relatives friend asked me. Her child had a sweat test and the results were a 58 and 73. She asked if this is considered positive since it's Friday and hasn't spoken to the doctor. I said I honestly don't know and didn't offer any opinion. I was just wondering what you guys think. A lot of you know just as much as the docs and amaze me with your knowledge. Does the positive result trump the high boderline? I'm not sharing the opinions with her, it's not my place. I was just curious.
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CF/not CF
- Thread starter Jshet22
- Start date
I always understood higher number = cf. Guess a lot depends though on the age of the child. Teeny tiny infants it's more difficult to get enough of a sample or an accurate sample. Case in point our then 3 week old with positive genetic blood test results had what was considered a normal 32 --- later he became much saltier and when I'd kiss his forehead, my lips would taste very salty. This was at an accredited CF facility. Which brings to mind another question. Was your relative's friend's child tested at a cf facility?
LittleLab4CF
Super Moderator
The range for an infant under six months of age is: 0-29 unlikely, 30-59 intermediate or possible and 60+ it is likely or positive. Beyond 6 months: 0-39 unlikely, 40-59 intermediate or possible and 60+ it's likely. A sweat chloride test may have to be repeated several times when CF is suspected. A CFer is more likely to result in a case of prickly heat when encouraged to sweat. In other words we're bad sweater's.
The idea is to test to make the largest possible number, they aren't going to average the results. At 73, being the larger number, they normally would accept it, hence the reason for repeating sweat chloride test every six months until a value representative of the patient's health is more or less a match.
I had a test one day and again two days later. There were 2 values with each test, keeping the higher value each time and using the highest of the tests.
A good answer, when you aren't certain,
LL
The idea is to test to make the largest possible number, they aren't going to average the results. At 73, being the larger number, they normally would accept it, hence the reason for repeating sweat chloride test every six months until a value representative of the patient's health is more or less a match.
I had a test one day and again two days later. There were 2 values with each test, keeping the higher value each time and using the highest of the tests.
A good answer, when you aren't certain,
LL
Last edited:
Thank you LL. I was hoping you would weigh in. I am grateful for your knowledge on this question, and all your replies I see to other members questions. I'm not gonna lie, I sometimes have to read your answers a few times until I completely understand, lol but have definetly learned a lot from your responses. Thanks again
LittleLab4CF
Super Moderator
Jshet22,
Thanks for the compliment. It came at a time I could do with an "attaboy". I'll have to work on being more concise, you're not the only person who has done a double read of my meaty morsels. One of my Asian distributors used to tell his clients that I spoke in High Density.
Thanks again,
LL
Thanks for the compliment. It came at a time I could do with an "attaboy". I'll have to work on being more concise, you're not the only person who has done a double read of my meaty morsels. One of my Asian distributors used to tell his clients that I spoke in High Density.
Thanks again,
LL