Background: There is international concern about the lack of compassion in healthcare systems.A valid and reliable tool for measuring compassion in healthcare systems and educational institutions is required. This comprehensive and critical narrative synthesis identified and compared existing measures of compassionate care in clinical settings.Methods: PubMed, Medline, CINAHL and PsycINFO databases and grey literature were searched to identify studies that report information on instruments that measure compassion or compassionate care in clinicians, nurses, healthcare students and patients. Textual qualitative descriptions of included studies were prepared. Instruments were evaluated using the Evaluating