EPTIS
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Porphyrin

[Porphyrin ]

EPTIS factsheet 142604 | Last revision 2024-05-22 | URL: https://www.eptis.bam.de/pts142604 https://www.eptis.bam.de/pts142604

PT provider
PT provider Weqas Weqas
Based in United Kingdom
Language(s)
Remarks The programme provides an assessment of the analytical performance of first-line laboratories undertaking both qualitative and quantitative analysis of PBG and TUP for the investigation of an acute attack and for laboratories offering an expanded repertoire for the investigation of cutaneous porphyria which also includes EDTA plasma and faecal porphyrin. Six urine samples are distributed every 3 months, 3 each for PBG and TUP along with 3 EDTA plasma samples for plasma porphyrin. Interpretative cases are distributed twice a year with Faecal porphyrin samples dispatched annually. For this programme participants are allowed 3 weeks to return their results. Reference target value assignment, EDTA plasma patient samples, faecal samples and clinical case interpretation are kindly provided by the Cardiff Porphyria Service. The Programme assesses both laboratory and method performance, including bias and within batch imprecision. The programme also assesses the laboratory’s pre and post analytical phases through the distribution of challenging samples (too dilute or concentrated) and the interpretation of Clinical cases. Key Features: - Covers both Qualitative and Quantitative assays. - Educational exercises including interpretive comments. - Reference target value assignment, EDTA plasma patient samples, faecal samples and clinical case interpretation are provided by the Cardiff Porphyria Service. - Challenging samples at or near diagnostic cut points. For more information: https://www.weqas.com/services/eqa/porphyrin/ or contact@weqas.com
Keywords
Product groups Health care / medical devices
Testing fields Medical analysis
Technical details
Test item Tested property Testing method
Fresh filtered human urine, EDTA Plasma, faeces Porphobilinogen (PBG) Routine testing methods (recommended)
PBG/Creatinine Ratio Routine testing methods (recommended)
Total Urine Porphyrin (TUP) Routine testing methods (recommended)
TUP / Creatinine Ratio Routine testing methods (recommended)
Plasma Porphyrin Routine testing methods (recommended)
Faecal Porphyrin Routine testing methods (recommended)
Clinical case interpretation Routine testing methods (recommended)
Aims of the PT scheme
Target group of participants The Programme assesses both laboratory and method performance, including bias and within batch imprecision.
Linked to specific legislation / standards Accreditation by UKAS on the basis of ISO/IEC 17025, 17043 and 15195
Additional, subsidiary aims validation of testing methods
Number of participants
Accredited or otherwise reviewed by a 3rd party

Accredited by UKAS on the basis of ISO/IEC 17043

Operation is commissioned / requested by
Fees and frequency
Participation fee https://www.weqas.com/participantzone/subscription-charges/
Regularly operated Yes (Frequency: Quarterly. Samples: 3 x 4.2mL (Urine) & 3 x 1.5mL (Plasma).)
Year of first operation 1995
Contact details of the PT provider
Provider Contact person
Weqas
Unit 6, Parc Ty Glas
CF14 5DU Cardiff
United Kingdom

Phone: 44 (0) 2920 314750
Fax:
Web: http://www.weqas.com http://www.weqas.com
Laura Lloyd-Lewis
Phone: 44 (0) 29218 32884
Fax:
Email: laura.lloyd-lewis@wales.nhs.uk laura.lloyd-lewis@wales.nhs.uk
If you find any mistakes please contact the responsible EPTIS coordinator in United Kingdom, Mr Savvas Xystouris. Mr Savvas Xystouris.
Any questions or problems? Please contact us at eptis@bam.de.
Application version: 1.23-SNAPSHOT.20230502124635-7925ae379a631fc1ececff45d2921c8db38877d5