Increasing use of a new health technology during the wait for NICE guidance: findings from the third national tracker survey of photodynamic therapy

Photodynamic therapy (PDT) is a relatively new treatment for neovascular age-related macular degeneration. Trial evidence suggests that repeated treatments with PDT can decrease the relative risk of a reduction in visual acuity over 2 years. Concerns raised over the clinical and cost effectiveness of the treatment prompted a technology appraisal by the National Institute for Clinical Effectiveness (NICE). Difficulties in assessing the possible benefit or otherwise of PDT have led to delays in the publication of guidance. During this time the introduction of PDT into the UK National Health Service (NHS) has continued. Over three annual tracker surveys, we describe trends in the provision of PDT in the NHS and potential difficulties in the implementation of NICE guidance.