Peter Cutting wrote:
>Anyone else having any false negatives with the urinary preg tests?
>We are investigating a couple in our dept and apparently our gynae team are looking at it too after they have had some.
>
>As part of our review we discoverd that the strips we use clearly say in the manufacturers leaflet that they must not be called a negative result before 5 minutes. There is a question mark that we may not have been doing this with every strip.
>
>There are also quality control issues. Do any of you subject your strips to reference samples? ( again the manufacturers recommend that you do) and if so who does it?
>
>Our Near Pt Testing bods are getting interested in external quality assessment schemes like NEQAS or WEQAS ( http://www.ukneqas.org.uk/ ). Anyone doing that?
>
>Cheers
>Peter
>
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Remember they go out of date relatively quickly too if left in the back
of a cupboard.
Another cause for false negatives.
Andy Webster
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