The Royal National Orthopaedic Hospital trust has developed an interactive CD aimed at helping GPs diagnose musculoskeletal disorders of the knee, such as osteoarthritis.

The CD gives advice on knee care, including common conditions, strategies for self-care, treatments, and examination techniques, including video clips showing specialists in action examining patients.

It was developed by three leading consultant surgeons at the London trust, to enable GPs to make more accurate referrals.

The project was funded by Shire Pharmaceuticals, the CD's supplier.

More CDs are planned, covering the hip, back, sports injuries, osteoporosis and osteoarthritis.