Double reading won't prevent sampling/collection errors.
AF
----- Original Message -----
From: "Ray" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, July 15, 2005 11:27 PM
Subject: Re: Urine pregnancy tests
> 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 Remember they go out of date relatively quickly too if left in the back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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