目的研究基质金属蛋白酶9(MMP-9)在颈动脉内膜剥脱术(CEA)术前、术中和术后的表达变化及其临床预警作用。方法前瞻性纳入2012年2至9月在北京协和医院血管外科行CEA治疗的颈动脉狭窄患者,根据术中经颅多普勒超声是否监测到栓子脱落将患者分为栓子组和无栓子组,使用酶联免疫吸附法和明胶酶谱法检测CEA术前、颈动脉开放前、开放后30 min、术后12 h血清MMP-9浓度和活性。结果共纳入40例患者,栓子组8例、非栓子组32例。栓子组术后12 h MMP-9浓度显著高于术前[(904.27±369.47)ng/ml比(333.88±126.32)ng/ml,t=4.132,P=0.001)],无栓子组术前、术后12 h MMP-9表达差异无统计学意义[(375.83±194.36)ng/ml比(472.74±271.21)ng/ml,t=-1.643,P=0.081)]。明胶酶谱结果同样显示,栓子组术后12 h MMP-9活性较术前显著升高。结论 CEA术后发生微栓子脱落者,其术后12 h血清MMP-9水平较术前显著升高,提示MMP-9可能为CEA术后脑缺血性损伤的潜在生化学标志物。
OBJECTIVE: To apply fractionated-clamping for repair of thoracoabdominal aortic aneurysm (TAA), and evaluate its effects in decreasing surgical mortality and severe complications, such as renal failure and paraplegia,...
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OBJECTIVE: To apply fractionated-clamping for repair of thoracoabdominal aortic aneurysm (TAA), and evaluate its effects in decreasing surgical mortality and severe complications, such as renal failure and paraplegia, a modified crawford procedure were prospectively evaluated. METHODS: Using modified shunting and cross-clamping techniques, modified Crawford repair in 13 thoracoabdominal aorta patients were performed in the Vascular Division at Peking Union Medical College Hospital. TAA Crawford classification: 1 type I, 2 type II, 2 type III and 3 type IV TAA. Debakey classification: 1 type I, 4 type III (including 2 ruptured aneurysms), and 1 aortic coarctation. RESULTS: Thirteen procedures were performed successfully. One died of ventricular fibrillation just before completing the operation. Surgical mortality rate was 7.7% (1/13). Postoperative complications included 1 acute necrotic pancreatitis, 1 ARDS, 1 paraplegia, 1 acute renal failure, and 2 thoracic cavity bleeding. Total complication rate was 53.8% (7/13). CONCLUSIONS: Fractionated-clamping in thoracoabdominal aortic aneurysm repair is our modified Crawford procedure and aortic bypass. Clinical results demonstrate that our procedure decreased surgical mortality and major complication rate, and also alleviated viscera ischemic injury. Fractionated-clamping in aorta replacement is a practical procedure for TAA repair under general anesthesia at normal temperature.
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