We have several of these instruments throughout our Trust (introduced
without our consultation). We have posted a couple of messages previously.
We have many concerns regarding the IRMA including cost and wastage. Users
have also express concern regarding discrepancies in potassium results
between laboratory and the IRMA. Which of course could be due to haemolysis.
We've done a limited comparison study and also found discrepancies in the
p02. Unfortunately when WEQAS sent out tonometered samples last year only
three results from IRMA's were returned. Details of the abstract/papers
would be appreciated.
Mrs Christine Hopkins
Point of Care Co-ordinator
Clinical Biochemistry Department
Princess of Wales Hospital
Coity Road
Bridgend
Mid Glamorgan
CF31 1RQ
Tel 01656 752331
Fax 01656 752332
> -----Original Message-----
> From: Fiona Bethell [SMTP:[log in to unmask]]
> Sent: Thursday, February 27, 2003 5:27 PM
> To: [log in to unmask]
> Subject: Re: POCT IRMA
>
> We evaluated one of these recently and found terrible correlations between
> the Chiron 855 and the IRMA for Na, Ca+, and especially pO2 - apparently a
> problem with sample application not pushing the calibration gel completely
> off the electrodes. The precision for the pCO2 was also poor from aqueous
> QC. I'm not convinced that a limited number of users would get enough
> practice with the injection technique to get reliable results especially
> for
> the pO2.
> There are 1 or 2 abstracts/papers confirming this. The large wastage of
> cartridges repeating the analyses will also make this analyser very
> expensive to run.
>
> Dr Fiona Ivison
> Dept. of Clinical Chemistry
> Royal Liverpool University Hospital
> 4th Floor Duncan Building
> Liverpool
> L7 8XP
>
> 0151 706 4287
>
>
>
>
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