Abstract: Objective　To explore the efficacy of problem-based learning (PBL) teaching method combined with graphic outline in searching foramen ovale of skull base for further training doctors.Methods　From January 2022 to December 2022, 60 of further training doctors were randomly divided into two groups: experiment group (n=30) and control group (n=30). The experiment group received the PBL combined with graphic sketching teaching method and control group received the traditional teaching method to search the foramen ovale in the procedure of balloon compression for trigeminal ganglion under X-ray guidance. The teaching efficacy were evaluated through theory tests and questionnaires.Results　Compared with control group, the total score of theory test, radiology scope and operation scores were higher in experimental group, respectively (85.8±8.5 vs. 69.3±13.7, P<0.001; 24.7±3.9 vs. 21.8±5.2, P=0.018; 35.8±3.7 vs. 23.7±6.1, P<0.001). Questionnaires showed that better results in improving learning interest, improving learning ability, solving confusion, understanding key and difficult points and satisfaction were acquired in experimental group compared with control group (96.7±3.1 vs. 80.1±6.9, P<0.001; 95.2±4.5 vs. 76.7±6.2, P<0.0001; 96.0±4.1 vs. 72.7±7.9, P<0.001; 93.8±5.3 vs. 69.7±7.4, P<0.001; 97.2±3.7 vs. 75.0±7.3, P<0.001).Conclusion　The PBL combined with graphic sketching teaching method acquired better efficacy in improving learning interesting and ability to search the foramen ovale of skull base under X-ray guidance.

Key words: problem-based learning, graphic outline, balloon compression for trigeminal ganglion, foramen ovale