Palliative sedation therapy: a review of definitions and usage.

Palliative care clinicians are faced with the challenge of managing a multitude of complex symptom combinations in patients for whom they care. Although many symptoms respond favourably to established protocols, others may remain refractory to such intervention. It is within the context of trying to manage such symptoms that the issue of palliative sedation therapy arises. The use of sedation in such circumstances is one that has prompted considerable debate in the palliative care literature. Discourse has been hampered, however, by a lack of consensus regarding the meaning and intent of palliative sedation therapy, when it should be used clinically and how it is to be achieved pharmacologically. There is a dearth of research examining the meanings ascribed to its use from the perspective of patients, families, and health-care providers. This article will provide an overview of these identified issues, and provide suggestions for ways in which palliative sedation therapy might further be examined and understood.