Is there a case for not doing urine pregnancy tests in AED etc and just
measuring a serum HCG? these days that's easy
Ian Watson
>>> "Frost, Stephen" <[log in to unmask]> 07/08/05 5:05 pm >>>
Hi
If you haven't seen it yet, there is an interesting article by Graham
Beastall on issues and concerns of POCT on page 62 of this month's
(July)
Bulletin of RCPath. From a UK perspective, use of the adverse incident
reporting procedure of the MHRA is certainly recommended for any
quality
failures.
I wouldn't assume someone else has reported it. I can think of a few
scenarios where a false result could be traumatic.
Regards
Steve
-----Original Message-----
From: Mascall, Gary (Biochemistry)
[mailto:[log in to unmask]]
Sent: 08 July 2005 15:59
To: [log in to unmask]
Subject: Re: 'Surestrip' Pregnancy test
Just looked at the latest NEQAS report (under a pile of papers on my
desk),
and if the kit is the Applied Biotech Surestep hCG Combo, then there
is
definatley a problem with the kit. Quoted detection limit 20.
Sample X193 (50 u/L hCG added) 5 positive and 6 negative
Sample X194 (Pregnancy Urine value around 7000) 8 positive and 3
negative.
I'd steer clear of this one, and possibly report them, brings back
memories
another kit in the last couple of years.
Gary
G. C. Mascall
Consultant in Clinical Biochemistry
Worcestershire Acute Hospitals NHS Trust.
[log in to unmask]
Tel: 01562 823424 extn 53464/53136
-----Original Message-----
From: Clinical biochemistry discussion list
[mailto:[log in to unmask]]On Behalf Of Joan Pearson
Sent: 08 July 2005 15:35
To: [log in to unmask]
Subject: 'Surestrip' Pregnancy test
One of our A&E consultants has enquired about possible reasons for two
false
negatives on this kit.
Both were done in the early hours of the morning, one on a patient
1/52
after missed period and the other in a patient who was around 8 weeks
pregnant. The kit insert states that urine taken at any time is OK,
but
obviously an early morning specimen is preferred and a very dilute
urine
might be a problem particularly in very early pregnancy. It claims to
detect hCG concentrations of 20 mIU/ml or more.
In the absence of any further information (interfering substances
crossed my
mind) I suggested training/competency - possibly someone who was not
familiar with the procedure doing it during the night under pressure.
Any other suggestions?
Thanks
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