Search

Background: Searching for topics within large biomedical databases can be challenging, especially when topics are complex, diffuse, emerging or lack definitional clarity. Experimentally derived topic search filters offer a reliable solution to effective retrieval; however, their number and range of subject foci remain unknown. Objectives: This systematic scoping review aims to identify and describe available experimentally developed topic search filters. Methods: Reports on topic search filter development (1990‐) were sought using grey literature sources and 15 databases. Reports describing the conception and prospective development of a database‐specific topic search and including an objectively measured estimate of its performance ('sensitivity') were included. Results: Fifty‐four reports met inclusion criteria. Data were extracted and thematically synthesised to describe the characteristics of 58 topic search filters. Discussion: Topic search filters are proliferating and cover a wide range of subjects. Filter reports, however, often lack clear definitions of concepts and topic scope to guide users. Without standardised terminology, filters are challenging to find. Information specialists may benefit from a centralised topic filter repository and appraisal checklists to facilitate quality assessment. Conclusion: Findings will help information specialists identify existing topic search filters and assist filter developers to build on current knowledge in the field. [ABSTRACT FROM AUTHOR]

Background: Reports from patients on seeing or hearing a dead relative or dreaming a highly significant dream at the end of life can be perplexing for health professionals who may wonder how best to respond. Aim: The aim of this study was to systematically review the literature on deathbed phenomena (DBP), and provide suggestions for a clinical response to dying patients’ recounts of these hard-to-explain phenomena. Methods: The authors searched for relevant studies which reported on DBP within a palliative care context. Eligibility criteria were established, a review process was employed and a narrative synthesis approach was used to interpret the data. Results: In total, eight papers met the inclusion criteria. Reported prevalence of DBP ranged from 24–51% with common themes described. Distinguishing between DBP and hallucinations was discussed, requiring very different clinical responses. Phenomena were timed most often in the last hours or days before death. Experiencing a DBP was, in most cases, deeply meaningful, bringing comfort, peace and reassurance. Health professionals were not surprised to hear of a DBP, but were not always well prepared to respond appropriately. Conclusions: Rather than simply dismissing DBP as medication related or the physiological effects of dying, the significance of these events and the comfort afforded by them to patients and carers should be recognised. Disclosure of DBP may enable health professionals to discuss more spiritual and existential concerns, which have the potential to offer hope, meaning and connection. We propose strategies and approaches for strengthening compassionate clinical practice in this area. [ABSTRACT FROM AUTHOR]