• Yu Shen, Hui-liang Shen, Wen Zhang, and Xiu-tong Fang.
• Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China.
• Zhonghua Yi Xue Za Zhi. 2013 Nov 5;93(41):3276-9.

ObjectiveTo explore the causes for delirium of elderly patients after hip fracture operation.MethodsA total of 68 cases of delirium were selected from 458 patients aged over 65 years undergoing hip fracture operation via spinal anesthesia from 2009 to 2011. There were 26 males and 42 females with an average age of 72.9 (66-98) years. Their clinical features, such as gender, operative duration, blood loss volume, saturation of arterial oxygen, were observed. After single factor risk analysis, multiple factor analysis was performed by binary Logistic regression.ResultsDelirium occurred at certain timepoints during the first postoperative days. The incidence of delirium was 14.9%. The Logistic stepwise regression analysis showed that significant differences existed between delirium and non-delirium in age (P = 0.042), operative duration (P = 0.042), blood loss volume (P = 0.027), hypoxemia (P = 0.019) and preoperative comorbidity (P = 0.029).ConclusionThe independent risk factors for postoperative delirium include age, operative duration, blood loss volume, preoperative comorbidity and hypoxemia.

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