[Doctoral theses and memoirs about anesthesia. Documents for a history of Spanish anesthesia].

Based on the importance of document files and first-hand bibliographic sources for studying the history, we have recently investigated the chapter of Doctoral Thesis and Reports on anesthetic topics since we believe that these are fundamental to gain insight into the knowledge of our history. This investigation was planned to find such documents by reviewing the data of several Spanish archives and libraries. We collected 80 works: 14 Reports and 66 Doctoral Theses performed during a period of 95 years (heuristic limits 1847-1942). These papers were classified in several subgroups according to the subjects they deal with: 21 works on inhalation anesthesia, 7 on intravenous general anesthesia, 20 on spinal anesthesia, 10 on locoregional, 7 on anesthesia and metabolism, 12 on obstetric anesthesia, and 3 works on varied anesthesia issues. Analysis of these documents revealed that the authors (physicians and Spanish medical corporations) undertook an accurate consideration of the more relevant scientific subjects at the time of their investigation. We conclude that the works analyzed in the present study represented the beginning of the Spanish investigation on anesthesia. Further investigations may contribute to enrich our historiography.