Donor Exclusion in the National Blood Service Tissue Services Living Bone Donor Programme
National Blood Service (NBS) Tissue Services (TS) operates living donor and deceased donor tissue banking programmes. The living bone donor programme operates in collaboration with 91 orthopaedic departments across the country and collects bone donations, in the form of surgically removed femoral heads (FHs), from over 5000 patients per annum undergoing total hip replacement. Bone donated via the living programme constitutes approximately 55% of the total bone donated to NBS. Non-NBS tissue banks, primarily in hospital orthopaedic departments, also bank donated bone for the UK. A survey of information received from 16 collaborating orthopaedic centres, between April 2003 and August 2004, identified 709 excluded donors. The total number of donations banked from these sites was 1538. Donations can be excluded before collection if there are contraindications noted in a potential donor’s medical history before their operation. Donors may also be excluded after collection of the FH, for instance because of reactive microbiology tests for blood borne viruses, or if the donation storage conditions or related documentation have not met stringent quality requirements. In this survey, bone or joint conditions were the major reasons for excluding potential donors before donation (154 of 709 exclusions, 22%), followed by a current or a past history of malignancy (139 of 709 exclusions, 20%). Local staffing and operational difficulties sometimes resulted in potential donors being missed, or specific reasons for exclusion not being reported (117 exclusions). These out numbered exclusions due to patient refusal (80 exclusions). A small number (< 5) appear to have been excluded erroneously. There was considerable local variation in the reasons given for exclusion and certainly under-reporting. A survey of donations discarded after collection in the same period highlighted that 43% were donor related; 110 of 370 did not provide a follow-up blood sample. More than 30% were due to delays in forwarding blood samples to the microbiological laboratory for testing, resulting in deterioration of the sample quality. Training to ensure that standards are complied with and a firm evidence base for exclusion criteria, applied uniformly, will help focus donor identification efforts on individuals meeting rational criteria so that fewer potential donations are lost.
KeywordsDonor deferral Donor selection Hip replacement Malignancy Tissue donation Tissue transplantation
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