The link is to an incomplete BET.
Over the years I can only remember one problem with a pregnancy test and
that was "pilot error" so the tests are double read by 2 staff now.
Ray McGlone
Lancaster
----- Original Message -----
From: "John Butler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, July 15, 2005 7:27 PM
Subject: Re: Urine pregnancy tests
> Hello Peter,
>
> One of our students has just completed a BET looking at this question.
> There is reasonable evidence that serum is more sensitive than urine Bhcg.
> See below
> http://www.bestbets.org/cgi-bin/bets.pl?record=00936
>
> John Butler
>
> ----- Original Message -----
> From: "Peter Cutting" <[log in to unmask]>
> To: "John Butler" <[log in to unmask]>
> Sent: Thursday, July 14, 2005 4:40 PM
> Subject: Re: Urine pregnancy tests
>
>
> I'm sad to say that seeing 350 pts a day means they dont stay at the back
> of a shelf for very long! (obviously they dont all get pregnancy tests
> though......... even those with X X)
> All were in date
> Peter
>
>>>> [log in to unmask] 11:20:20 14/07/2005 >>>
> 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 Remember they go out of date relatively quickly too if left in the back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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