Methodological challenges in conducting instrumentation research in non-communicative palliative care patients.

Well-designed, rigorously implemented instrumentation studies are essential to develop valid, reliable pain assessment tools in non-communicative (non-self-reporting) palliative care patients. When conducting a pain instrumentation study, a research team identified methodologic challenges surrounding informed consent, eligibility criteria, acute pain operational definitions, patient recruitment, missing data, and study-related training during a run-in phase at the beginning of the project and during the conduct of the study. The team dealt with these challenges through identifying root causes, implementing remedial measures, and collecting data to demonstrate improvement or resolution.