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Quality Assurance

Accreditation

Cardiff porphyria service is fully accredited to ISO 15189 by the United Kingdom Accreditation Service (UKAS). Our UKAS schedule of accreditation can be found here.

Internal Quality Control

Analyte

Level 1

%CV

EMU3

Level II

%CV

EMU

Units

Total urine porphyrin1

275

5.9

34

1244

4.0

126

nmol/l

Total faecal porphyrin2

51

9.6

12.0

629

2.3

108

nmol/g (dry wt)

Urine porphobilinogen1

5.7

7.5

0.8

62.4

4.8

5.6

μmol/l

Urine 5-Aminolevulinic acid1

35.8

8.0

5.6

156.0

5.4

26.2

μmol/l

RBC protoporphyrin2

1.2

8.1

0.3

19.6

6.0

2.2

μmol/l

(1) Recipe ClinChek® lyophilised urine control

(2) In house control material

(3) Extended Measurement of Uncertainty

External Quality Assurance

The Cardiff Porphyria Service participates in the EpNet Porphyria external quality assessment scheme and the Royal College of Australian Pathologists quality assurance programme. Our performance is within assigned limits and we have correctly identified all porphyria cases.

 

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