This cross-sectional study is designed to evaluate the recognition, subjective understanding (SU), and objective understanding (OU) of the terms used in obtaining informed consent for surgery and also the levels satisfaction with the explanations (ES) provided in the informed consent process. Data are collected using a structured self-report questionnaire answered by 243 patients who had orthopedic operations in South Korea in July to August, 2014. The mean number of terms recognized is 6.24, and lower in age over 50 years (F=11.46, p<0.001) and education level of elementary and middle school compared with college and higher (F=12.06, p<0.001). The mean SU was 73.90 out of 100 points and was lower in patients without a high school education than in those with a college education (F=12.39, p<0.001). The mean OU is 68.04 out of 100 points and lower in age over 50 years (F=5.91, p<0.001) and education level of elementary and middle school compared with college and higher (F=8.06, p=0.001). ES is positively correlated with both term recognition (r=0.168, p=0.009) and SU (r=0.135, p=0.035). The results of this study suggest that medical personnel should monitor patients’ recognition, understanding, and explanation satisfaction of the terms used in the consent process and give feedback to patients to enhance their understanding and explanation satisfaction.