Ex vivo experiment on radiofrequency liver ablation with saline infusion through a screw-tip cannulated electrode

被引:92
作者
Miao, Y
Ni, YC
Mulier, S
Wang, K
Hoey, MF
Mulier, P
Penninckx, F
Yu, J
DeScheerder, I
Baert, AL
Marchal, G
机构
[1] UNIV HOSP,DET ABDOMINAL SURG,B-3000 LOUVAIN,BELGIUM
[2] UNIV HOSP,DEPT CARDIOL,B-3000 LOUVAIN,BELGIUM
[3] UNIV MINNESOTA,DEPT PHYSIOL,MINNEAPOLIS,MN 55455
[4] MEDTRONIC INC,MINNEAPOLIS,MN
关键词
D O I
10.1006/jsre.1997.5133
中图分类号
R61 [外科手术学];
学科分类号
摘要
Purpose: To investigate whether radiofrequency (RF) therapy with hypertonic saline infusion through a hollow screw-tip electrode can cause a lesion size suitable for liver tumor ablation. Materials and methods: RF tissue ablation of 180 sites was performed by using a hollow screw-tip electrode in 40 freshly excised swine livers. Under both power and temperature control modes, the ablation effects with and without various regimes of 5% hypertonic saline (1 ml/min) prior to and/or during the procedure were compared by measuring the size of lesions at dissection and confirmed by T1 and T2 weighted magnetic resonance (MR) imaging. Results: The maximal lesion diameter of 5.5 cm was reached at 30 W with saline infusion 1 min prior to and during 12 min of ablation. The smaller sizes (P < 0.01) between 0.3 and 2.5 cm in diameter were met with noninfusion or preinfusion-only groups. The RF ablation lesions appeared as hyper-and hypointense areas on T1 and T2 MR images, respectively. Conclusions: RF ablation in combination with present hollow screw-tip electrode and saline infusion allows for necrotic development of suitable size for liver tumor ablation. Such ablated lesions can be visualized with MR imaging. (C) 1997 Academic Press.
引用
收藏
页码:19 / 24
页数:6
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