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暂时低位腹主动脉阻断技术临床应用的安全性研究
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摘要
目的:研究暂时低位腹主动脉阻断技术临床应用的安全性。
     方法:选择予暂时低位腹主动脉阻断行骨盆或骶尾部肿瘤全切除术病人14例(A组,n=14),腰椎病损或骨折行侧前入路行腰椎次全切除术病人14例(B组,n=14),测定手术前后不同时间点静脉血浆T-SOD、MDA。同时统计出血量,观察术后的神经及血管症状和体征。
     结果:单次阻断时间52min~84min,无一例重复阻断。与缺血前比较,大多数再灌注时点血中MDA明显升高,而SOD明显降低(P<0.05)。B组各时间点间T-SOD、MDA值变化不大(P>0.05)。术中总出血量1000ml~4000ml,平均2600ml。其中在完成肿瘤切除时累计出血量约200ml~400ml,平均280ml;较多出血出现在解除阻断行创面止血时,主要为创面大面积渗血和供瘤血管出血。术中生命体征平稳,术后无并发症发生。
     结论:单次低位腹主动脉阻断时间≤90min有一过性缺血-再灌注损伤表现,但损伤轻微并短时间内恢复,阻断时限和阻断装置压力认为是有效和安全的。
Abstract: Objective: To study the security on the clinical application of temporary blockage of low-set abdominal aorta as a useful adjuvant technique.
     Method: Of fourteen cases of sacral or pelvic tumor who underwent tumorectomy assisted with temporary blockage of low-set abdominal aorta were classified into group A and fourteen cases of lesion or fracture of lumbar vertebra who underwent lumbar subtotal ectomy by latero-anterior aspect operative approach were classified into group B; the changes of total superoxide dismutase(T-SOD) and malondialdehyde (MDA) in the venous blood were studied during the the different perioperatively periods. The dose of intraoperative hemorrhage were added up . Postoperative symptom of nerves and blood vessel were observed .
     Result: The total time of blockage of low-set abdominal aorta is 52min-84 min , no case has a repeat ed blockages. For group A , MDA levels in the blood were markedly increased, while the activity of SOD decreased (P<0. 05)during the period of ischemia-repedusion as compared with those before isehemia, but that were negligibl changes when it came to group B (P>0.05). The total dose of intraoperative hemorrhage were 1000ml-4000ml, with the average hemorrhage of 2600ml. The dose of hemorrhage were 200ml-400ml when the tumors were totally resected, with the average hemorrhage of 250ml. Exessive leeding, which must be stopped, occurs when the blockage is removed . This bleeding is mainly from the incision and vessels supplying the tumour. The intraoperative vital signs were equability. No complications were found during follow up after the operations. Conclusion: Temporary blockage of low-set abdominal aorta had a lightly impact on Ischemia-reperfusion injury of body. The injuries of body cound restore short time later if the period of blockage less than 1. 5 h. We though that the application of temporary blockage of low-set abdominal aorta was safe and effective if the period of blockage less than 1.5 h and the pressure of block is right.
引文
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