[Meta-synthesis: a research methodology].

This article resulted from a bibliographical review concerning meta-synthesis, considered to be a novel methodology in health science research. Meta-synthesis' importance lies in evaluating high complex scientific evidence from qualitative research and strengthening a discipline's body of knowledge when constructing, describing or explaining related theories. Several authors' definitions of meta-synthesis are presented. They coincide in stating that its purpose is to enhance interpreting an outcome by integrating the findings from qualitative research and thus have an impact on support, research and proposals in resolving problems regarding nursing practice. Some criteria to be born in mind when applying this methodology are also mentioned.