Dear All,

We have recently had a problem with a batch of contaminated paediatric EDTA tubes when measuring ammonia.
When we experienced problems previously, we ran a 'blank' sample from the same batch alongside each patient sample, but this practise was not continued routinely.

I was just wondering if other labs did/ didn't always run blanks for ammonia, in routine practise?
Those that do, what procedures do you follow?

Thanks in advance for any help,

Brian

Brian Tennant
Dept Clinical Biochemistry
Mayday Healthcare NHS Trust
020 8401 3548

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