手术训练系统可以模拟手术环境，提高受训人员的操作技能。本文设计了一种新型的心脏外科手术模拟训练系统，并选择离体猪心脏作为心脏外科手术模拟训练系统的心脏模型，通过设计机械运动装置来实现心脏模型的跳动，同时可调整机械结构运动的频率来改变心脏模型的跳动频率。为验证该系统的合理性，将 12 名非医学专业学生与 12 名医学专业学生分为两组，使用心脏外科手术模拟训练系统进行为期 7 d 的不停跳冠脉搭桥手术训练，记录受训人员训练前后完成搭桥的时间，并由 3 名外科医生采用对象结构评价技能（OSATS）评估标准对每名学员的冠脉搭桥手术训练结果进行评分。通过训练，两组受训人员完成搭桥缝合的时间均显著缩短，训练前后的 OSATS 评分均得到提高。结果表明，心脏外科手术模拟训练系统在提高受训人员手术技巧、操作技能、掌握手术器械的使用等方面具有较好的训练效果。 Simulations can mimic the environment that refers to the surgery operation to improve the technical skills of the trainees. In this paper, we designed a new cardiac surgery simulative training system. The isolated pig heart was selected as the heart model. A mechanical device was designed to achieve the beating of heart model. At the same time, adjusting frequencies of mechanical movement could change the rating of heartbeat. In order to validate the rationality of the system, 12 non-medical specialty students and 12 medical specialty students were divided into two groups, which consecutively accepted seven-days of training for off-pump coronary artery bypass grafting using the cardiac surgery simulative training system. The time for completing bypass grafting before and after training were recorded. And the bridging outcomes of each trainee were assessed by 3 surgery cardiac surgeons using the object structured assessments of technical skill (OSATS) criteria. After training, each trainee could finish the bypass suturing in a shorter time than before training, and the scores of each trainee assessed by OSATS criteria were also improved. The results showed that the cardiac surgery simulative training system had better training effect in improving the surgical techniques, operation skills and proficiency of surgical instruments of trainees.
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