[Development and evaluation of complex interventions in nursing : Application of the medical research council's framework using the example of interventions to prevent physical restraints].

Many nursing interventions are complex. They comprise different intervention elements (components) and aim to change processes or behaviours of individuals or groups. A framework of the British Medical Research Council comprises methodological recommendations for the development and evaluation of complex interventions. This narrative review describes the framework's methodological recommendations using an example of interventions to reduce physical restraints in hospital and long-term care settings, such as bedrails or belts in chairs and beds. In addition to the characteristics of the complex interventions, the development and theoretical foundation of the interventions as well as the feasibility test and evaluation is described.