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POCT Blood Gas

[POCT Blood Gas]

EPTIS factsheet 1144022 | Last revision 2024-05-22 | URL: https://www.eptis.bam.de/pts1144022 https://www.eptis.bam.de/pts1144022

PT provider
PT provider Weqas Weqas
Based in United Kingdom
Language(s) English
Remarks The Programme aims to assess the performance of organisations utilising blood gas analysers to aid in the diagnosis of the patient’s acid base balance and the status of routinely measured electrolytes and metabolites. The standard aqueous material includes the addition of protein which minimises the risk of preanalytical sampling error due to the protein foam layer. The protein material also highlights errors in electrolyte analysis that cannot be detected by other aqueous controls. The tonometered protein based aqueous material is distributed monthly, covering blood gases, electrolytes and metabolites including Haematocrit, Urea, Creatinine and Lactate. A wide clinical range is covered, including challenging samples at low pO2 and low iCa++ concentration. The latter is suitable for the evaluation of instruments used in the monitoring of patients on citrate anticoagulation for Continuous Renal Replacement Therapy (CRRT). Once a year, tonometered whole blood is distributed as an accuracy check in addition to the aqueous material. This material has identical oxygen saturation characteristics to fresh whole blood and is used to provide an assessment of accuracy for pO2 (especially at low pO2) and in the evaluation of derived parameters (SBC, BE and Oxygen Saturation). The haemoglobin buffering in this material provides a 10-minute open ampule stability. Three aqueous samples are distributed monthly, with a minimum of 33 samples distributed over the year, covering a wide clinically relevant range. The samples consist of a panel of 6 linearly related samples distributed on a number of occasions over that period, which are used to assess both laboratory and method performance, including linearity, bias, and within and between batch imprecision. For more information: https://www.weqas.com/services/poct-eqa/poct-blood-gases/ or contact@weqas.com
Product groups Health care / medical devices
Testing fields Medical analysis
Technical details
Test item Tested property Testing method
Tonometered protein buffered aqueous solution and whole blood PH Routine testing methods (recommended)
H+ Routine testing methods (recommended)
pCO2 Routine testing methods (recommended)
pO2 Routine testing methods (recommended)
Actual Bicarb Routine testing methods (recommended)
TCO2 Routine testing methods (recommended)
Na+ Routine testing methods (recommended)
K+ Routine testing methods (recommended)
Cl Routine testing methods (recommended)
Magnesium Routine testing methods (recommended)
iCa++ Routine testing methods (recommended)
Glucose Routine testing methods (recommended)
Lactate Routine testing methods (recommended)
Urea Routine testing methods (recommended)
Creatinine Routine testing methods (recommended)
Haematocrit (iStat only) Routine testing methods (recommended)
Lithium Routine testing methods (recommended)
SBCe Routine testing methods (recommended)
BE Routine testing methods (recommended)
sO2 Routine testing methods (recommended)
Aims of the PT scheme
Target group of participants The Programme is available to both Laboratory and Point of Care testing sites and offer the complete repertoire of blood gases including calculated parameters, electrolytes and metabolites with a separate sample and programme available for Co-oximetry analysis.
Linked to specific legislation / standards Accreditation by UKAS on the basis of ISO/IEC 17043
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: Bimonthly. Samples: 3 x 2.5mL)
Year of first operation 1994
Contact details of the PT provider
Provider Contact person
Unit 6, Parc Ty Glas
CF14 5DU Cardiff
United Kingdom

Phone: 44 (0) 2920 314750
Web: http://www.weqas.com http://www.weqas.com
Laura Lloyd-Lewis
Phone: 44 (0) 29218 32884
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