Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (12): 2091-2099.doi: 10.3969/j.issn.2095-4344.2013.12.001
Yang Qing, Tong Yu-yun, Guo Li, Wang Jia-ping, Li Ying-chun, Jiang Hua
Received:
2012-12-12
Revised:
2013-02-05
Online:
2013-03-19
Published:
2013-03-19
Contact:
Tong Yu-yun, Master, Attending physician, Department of Interventional Radiology, Second Hospital of Kunming Medical University, Kunming 650101, Yunnan Province, China
1012580@qq.com
About author:
Yang Qing☆, Doctor, Attending physician, Department of Interventional Radiology, Second Hospital of Kunming Medical University, Kunming 650101, Yunnan Province, China
yq7119@hotmail.com
CLC Number:
Yang Qing, Tong Yu-yun, Guo Li, Wang Jia-ping, Li Ying-chun, Jiang Hua. Self-made Fe3O4 versus gelatin sponge embolic agents in rabbit pulmonary microcirculation[J]. Chinese Journal of Tissue Engineering Research, 2013, 17(12): 2091-2099.
2.1 实验动物数量分析 实验共用兔21只,其中1只行肺血管铸型,实验过程中死亡12只,死亡兔经解剖排除与异位栓塞相关,死因与麻醉过量、感染相关,及时补充实验兔达实验组规定数目,栓塞成功,最终计入结果分析兔共20只。 2.2 Fe3O4微粒体外形态 Fe3O4微粒加入碘化油中,初期微粒聚集呈大小不等团块沉于碘化油底部。充分振荡后,磁微粒团块离散,微粒呈均匀、分散状悬浮于碘化油中,然后缓慢沉降。用注射器推注可顺利通过直径为3-6F的动脉导管。5种规格及不同比例的Fe3O4微粒在碘化油中的悬浮情况见表1。5种Fe3O4微粒在各自沉降10%,20%,30%,50%,80%,100%的平均沉降时间和平均沉降速度间差异有显著性意义(P < 0.001)。"
2.5 实验兔栓塞后1,2,4周肺组织病理分析结果 大体观察结果:Fe3O4微粒栓塞组兔肺栓塞后1周(2只),栓塞肺脏体积变小,颜色暗红,被栓塞的肺段充血明显。2周(2只)、4周(6只),栓塞肺脏,表面有散在出血点,质地变韧,实质出现梗死区域,梗死区与正常肺质分界清楚。明胶海绵自制颗粒1栓塞组兔栓塞肺动脉后1周(1只) ,栓塞肺体积稍增大,颜色深红,2周时(1只),栓塞肺体积肺恢复正常,未见有明显梗死区域。4周时(2只),仍未见有明显梗死改变。明胶海绵自制颗粒2栓塞组兔栓塞肺动脉后1周(1只)栓塞肺体积稍增大,颜色正常,2周时(1只),栓塞肺体积肺恢复正常,未见有明显梗死区域。4周时(2只),仍未见有明显梗死改变。见图8。"
Fe3O4微粒栓塞组兔肺栓塞后1,2,4周,苏木精-伊红染色示50-250 μm的Fe3O4微粒:黑色Fe3O4微粒栓塞肺细小血管内,在较大血管中颗粒互相集聚成团,较小血管中偶可见单颗粒,各组颗粒栓塞血管程度不同,50 μm组栓塞可见少量位于肺泡周毛细血管及毛细血管前小动脉,多数集聚于小动脉内,栓塞彻底。100 μm粒径很少栓塞毛细血管,常五六个视野内未见栓塞毛细血管,毛细血管前小动脉见栓塞,多数集聚于5级分支小动脉内,150-250 μm栓塞范围在小动脉四五级小动脉内。明胶海绵自制颗粒1栓塞组兔栓塞肺动脉后1周(1只),可见3级大动脉及4级小动脉内栓塞剂栓塞,远端小动脉未见栓塞。明胶海绵自制颗粒2栓塞组基本与明胶海绵自制颗粒1栓塞组相同。Fe3O4微粒栓塞组可见局部组织坏死,其他两组未见异常。见图9。"
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