Molecular Rapid Aneuploidy (In collaboration with UK NEQAS Clinical Cytogenetics)|
Accredited UKAS 7872.
FISH for prenatal Aneuploidy testing.
PURPOSE OF PROGRAMME:
To establish the cytogenetic analytical and interpretative capabilities of the participating laboratory using FISH on prenatal samples.
|dna from prenatal samples|
MATERIAL PROVIDED: Fixed Cell Suspension.
DISTRIBUTIONS PER YEAR: 1
SAMPLES PER DISTRIBUTION: 2
FREQUENCY OF DISTRIBUTION: 1 distribution in accordance with the annual EQA timetable.
PROGRAMME OF ANALYSIS:
Fixed cell suspension samples are sent to the laboratory, each with a referral card to mimic a routine diagnostic case. Instructions and a user guide are available on the website. The participant analyses the sample, interprets the results and reports via the CEQAS website. The EQA is open for 4 weeks. Results can be entered at any time during this period. Any non-submitting labs will be contacted and given 24 hours to submit a late result.
All EQA cases are validated prior to release. Results are assessed by a panel of experts against set marking criteria based upon professional guidelines. There are three marking categories, Analytical, Interpretation and Clerical Accuracy. Each category carries two points. Deductions are made in accordance with the severity of the omission. A “critical error” is an error made in either the analytical or interpretive category that could lead to serious clinical consequences or imply a significa
Satisfactory/Poor. A non-submission is also given a poor performance.
PERSISTENT POOR PERFORMANCE:
This is defined as: a) Two poor performances in any constitutional cytogenetic EQA in which the laboratory participates, over three or more distributions of material, within a 36 month rolling period; b) A poor performance within one year following a previous persistent poor performance designation.
The External Quality Assessment Scheme for Molecular Genetics was founded in 1991. In 1999 the Service became known as the UK National External Quality Assessment Service for Molecular Genetics. UK NEQAS for Molecular Genetics is part of NHS Lothian.