Evaluation of ethical aspects in health technology assessment: more methods than applications?

Health technology assessment (HTA) emerged with the increased need for systematical evaluation of health technologies in the 1970s. From its very beginning, ethics was a constitutive part of HTA, and over the years a wide range of approaches have been suggested to address ethical aspects of health technologies. Despite a vast variety of methodologies in ethics, there is no consensus about the appropriateness of the existing methods. Moreover, while the available methods are many, their applications are few. While methods for addressing ethical issues in HTA have been richly reviewed, their applications are poorly tracked. Hence, a bottom up approach, that is, from practice to theory, may turn out to be as helpful as a top-down review. We need a review of the examples of ethics in HTA so we better can learn how the methods are used in practice, analyze the role of context, and better can assess the merits of the various methods.