目的：探讨脑梗死出血转化(HT)的病因，发生率，临床表现和影像学特点及预后。方法：对我院2002年1月至2008年7月96例脑梗死出血转化患者进行回顾性分析。结果：糖尿病、高血压、心房纤颤、血脂异常、大面积脑梗死是HT的主要病因，其发生率为20.3%，第一周为62.5%，第二周为31.2%，两周后为6.3%，其临床表现为头痛、呕吐、肢体无力加重、意识障碍加深，CT或MRI表现为非血肿型与血肿型，死亡率为16.7%。结论：对神经症状及体征加重的患者，尤其是大面积脑死患者，应及早查复查CT或MRI，有利于HT的早期诊治。
Objective To study the feasibil ity and rel iabil ity of the multi-plannar reformation (MPR) of multispiral CT (MSCT) in measuring the kyphosis angle (KA) after thoracolumbar fracture. Methods From December 2007 to December 2009, 45 thoracolumbar fracture patients who underwent computed radiology (CR) and MSCT were recruited. There were 32 males and 13 females with a mean age of 48 years (range, 24-63 years), including 36 simple compression fractures and 9 burst fractures. The fracture locations were T11 in 6 cases , T12 in 11 cases, L1 in 20 cases, and L2 in 8 cases. Fracture was caused by trafffic accident in 25 cases, by fall ing from height in 12 cases, and by others in 8 cases. The imaging examination was performed after 2 hours to 7 days of injury in 22 cases and after more than 7 days in 23 cases. The KA was measured on the lateral X-ray films of CR and MPR by two observers, then the measurements were done again after three weeks. The data were statistically analyzed. Results The average KA values on CR by two observers were (20.75 ± 8.31)° and (22.49 ± 9.07)°, respectively; showing significant difference (P lt; 0.05), and the correlation was good (r=0.882, P lt; 0.05). The average KA values on MPR by two observers were (16.65 ± 8.62)° and (17.08 ± 7.88)°, respectively, showing no significant difference (P gt; 0.05), the correlation was excellent (r=0.976, P lt; 0.05). The average KA values on CR and MPR were (21.61 ± 8.43)° and (16.87 ± 8.20)°, respectively; showing significant difference (P lt; 0.05), the correlation was good (r=0.852, P lt; 0.05). Conclusion It is more feasible and rel iable in measuring the KA on MRP of MSCT than CR, but the value is larger on CR.