The Guardian today reports a NICE study which finds that hospitals don't always keep sets of instruments together. This is designed to make it easy to trace instruments if one particular instrument is found to be contaminated.
This finding was discovered by a team drafting guidance on preventing transmission of CJD. This would appear to be the 2nd draft of the 2nd consultation on Patient safety and reduction of risk of transmission of Creutzfeldt-Jakob disease (CJD) via interventional procedures, available via http://www.nice.org.uk/page.aspx?o=cjdconsultation2
On a related matter, a paper in the most recent Annals of the Royal College of Surgeons of England looks at the quality of new surgical instruments - do they work properly, do they break, and so on. Fifteen percent of the instruments examined (at hospitals in London) had a problem. Local quality control, the paper concludes, is vital. (This link is to Ingenta: you will need a subscription - which Leicester has - to read the full paper).