Six exercises are distributed each financial year. Each survey includes both screening tests (level 1) and factor assays (level 2), and there are 4 distributions each of the thrombophilia screening exercise.
Details of tests to be included in each survey are indicated in survey newsletters three months prior to survey distribution.
All samples are of lyphilised plasma, from donors screened for hepatitis B surface antigen (HBsAg) and for antibodies to hepatitis C virus and human immunodeficiency virus types 1 and 2 (anti HIV-1+2). In the majority of cases, samples are from single donations.
In the majority of cases, samples are from single donations, from donors with previously identified haemostatic defects or from normal donors - where applicable, samples may be prepared from plasma pools.
In addition to six main scheme distributions, relevant supplementary exercises are distributed on an ad-hoc basis to address current issues in haemostasis. Click here for more information.
Individual survey reports are made available within 2 weeks of the survey closing date for he respective survey - usually reports are available in less than a week from the closing date. Reports are made available as online PDF documents, and email alerts are sent out about availability.
An overall exercise report is made available to registered participants for download from the website. This report includes comprehensive analysis of test results by methodology, together with graphically represented data analysis for each test specimen.
Individual and overall survey reports are accessed by logging in to the participant data entry/reporting system.