醋酸注射及微波凝固治疗兔肝VX_2肿瘤的实验研究

Experimental study of acetic acid injection and microwave coagulation in treatment of liver VX_2 tumors of rabbit

目的 探讨醋酸注射及微波凝固治疗兔VX2 肝癌效果 ,并将二者进行对照研究。方法 将18只兔的 2 0个VX2 肝癌结节随机分为微波治疗组与醋酸治疗组 ,分别给予超声引导下醋酸注射及开腹直视下微波凝固治疗 ,治疗后行能量多普勒条件下超声造影 (Levovist)评价其疗效。标本行病理检查。结果 瘤内注射醋酸后呈现大部肿瘤组织及周边正常肝组织不规则坏死 ,病理证实为多处点片状或灶状坏死。微波治疗后呈现长椭圆形凝固区 ,病理证实为治疗后即刻为不完全坏死 ,2周后显示为完全坏死。结论 醋酸注射治疗凝固坏死程度强 ,但弥散性强 ,凝固范围不固定 ;微波热场分布均匀 ,坏死范围稳定可靠。

Objective To compare the effectiveness of acetic acid injection(AI) and microwave(MW) coagulation in the treatment of rabbits hepatic VX 2 tumors. Methods Eighteen rabbits with VX 2 tumor were divided into two groups randomly,one was treated by precutaneous acetic acid injection,and the other by microwave at laparotomy. Contrast-enhanced ultrasonography (Levovist) was used to assess the therapeutic effect after treatment. Pathologic changes were observed chronologically. Results Anomalo-necrosis areas including tumors and surrounding normal liver tissue were observed after AI,multiple point or sheet necrosis was confirmed by pathology. Long oval-shap coagulated areas were observed after MW,incomplete necrosis after treatment was immediately confirmed by pathology and changed to complete necrosis in two weeks. Conclusions AI is more effective in the treatment of liver tumors,but diffuses easily to normal liver and the necrosis area is not stable. MW thermal field is steady and necrosis area is reliable.