目的 探讨基于增强现实（augmented reality，AR）的融合投影实训平台在护理本科急危重症护理学大型车祸救援情境模拟教学中的应用效果。 方法 结合真实案例和院前急救教学目标与内容，设计大型车祸救援情境模拟教学案例，包括不同等级伤情的伤员角色和救援人员角色，并搭建AR融合投影实训平台。选取71名护理学本科生开展教学实践，以教师现场点评、课后测试题、教学反馈与意见进行教学评价。 结果 教师现场点评操作体验组学生现场救援完成度较好，检伤正确率较高，但仍需加强团队协作能力，并且需要提升对沉默型伤员的关注度。学生课后测试题正确率为97%。学生反馈提炼“理论与实践结合”“身临其境参与急救过程”“能力的培养与实践”“情感的认知与升华”“技术融入教育的重要性”5个主题；学生提出“改进案例呈现方式，教师提前示范演示”“提前进行任务分工，增加学生参与机会”“拓展课程教学内容，锻炼学生思考能力”3个建议。 结论 基于AR的融合投影情境模拟教学能重现真实急救场景，激发学生学习兴趣；将理论与实践相结合，提高实践教学效果；学生身临其境参与急救，弥补传统教学不足。

Objective To explore the application effect of an augmented reality（AR）-based fusion projection practical training platform in the large-scale traffic accident rescue scenario simulation teaching for undergraduate nursing students in the course of emergency and critical care. Methods Combining real-life cases with pre-hospital emergency teaching objectives and content，a large-scale traffic accident rescue scenario simulation teaching case was designed，including roles of casualties with different levels of injuries and rescue personnel. Also，an augmented reality fusion projection practical training platform was established. A total of 71 undergraduate nursing students participated in the teaching practice. Teaching evaluation was conducted through on-site teacher reviews，post-class test questions，teaching feedback and comments. Results Teachers’ on-site reviews indicated that students in the practice group performed well in on-site rescues and achieved a high accuracy rate in injury detection，though still needed to strengthen the teamwork ability and to improve the attention to the silent wounded. The accuracy rate of students’ post-lesson test questions was 97%. In feedback，five themes were extracted from students，namely “Inte-gration of theory and practice”，“Immersive participation in the first aid process”，“Cultivation of abilities and practice”，“Cognitive elevation and emotional engagement”，and “Importance of integrating technology into education”. Besides，students proposed three suggestions including “Improving the presentation of cases，teachers should demonstrate in advance”，“Assign tasks in advance to increase student participation opportunities”，and “Expand course teaching content to enhance students’ thinking abilities”. Conclusion The AR-based fusion projection scenario simulation teaching can recreate real emergency scenes，stimulate students’ interest in learning；integrate theory with practice to improve the effectiveness of practical teaching，and allow students to immerse themselves in first aid scenarios，compensating for deficiencies in traditional teaching methods.