Alkaline Phosphatase (ALP) Isoenzymes EQA

Accreditation Status: UKAS Schedule of Accreditation
Date Scheme started: 2019
Clinical Applicability:

Identification of the alkaline phosphatase (ALP) isoenzyme type, to determine the tissue source of the elevated ALP in serum.

Analytes:

ALP Isoenzymes including liver, bone, intestinal, biliary, macro and placental isoenzymes (SER/056)

Units for Reporting:

Grade and kU/L (arbitrary)

Samples Distributed: Liquid format. Normal and pathological human serum
Number of Distributions per year: 6
Number of Samples per Distribution:

2

Frequency of Distributions: Every two months as outlined in the Distribution Schedule
Schedule of Analysis: Data entry is via the web for the submission of results. Data analysis commences 21 days after sample dispatch. Late returns are accepted and will contribute to the laboratory's cumulative performance statistics.
Data Analysis:

Qualitative responses are recorded for each analyte and assessed in relation to the designated response

Performance Scoring: MI scoring
Criteria of Performance:

Laboratory performance is classified in terms of OMIS over a running analytical window of 6 distributions (12 months)

The categories of performance are:

  Total MIS
Good Zero
Adequate 1-3
Poor >3

 

Persistent Poor Performance:

Defined as being in the Poor Performance category for two or more successive Distributions