期刊
SURGICAL INNOVATION
卷 29, 期 6, 页码 705-715出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/15533506221074619
关键词
colorectal surgery; biomedical engineering; general surgery; hepatobiliary; interventional radio; surgical oncology
类别
资金
- Deutsche Forschungsgemeinschaft [LE 1343/2-1, NI 1621/1-1]
This study systematically assessed the vascular cooling effects in hepatic microwave ablation ex vivo. The results showed that the vascular cooling effect was mainly affected by the distance between the antenna and the vessel, while vessel diameter and flow rate played a minor role in vascular cooling effects.
Background. The impact of vascular cooling effects in hepatic microwave ablation (MWA) is controversially discussed. The objective of this study was a systematic assessment of vascular cooling effects in hepatic MWA ex vivo. Methods. Microwave ablations were performed in fresh porcine liver ex vivo with a temperature-controlled MWA generator (902-928 MHz) and a non-cooled 14-G-antenna. Energy input was set to 9.0 kJ. Hepatic vessels were simulated by glass tubes. Three different vessel diameters (3.0, 5.0, 8.0 mm) and vessel to antenna distances (5, 10, 20 mm) were examined. Vessels were perfused with saline solution at nine different flow rates (0-500 mL/min). Vascular cooling effects were assessed at the largest cross-sectional ablation area. A quantitative and semi-quantitative/morphologic analysis was carried out. Results. 228 ablations were performed. Vascular cooling effects were observed at close (5 mm) and medium (10 mm) antenna to vessel distances (P < .05). Vascular cooling effects occurred around vessels with flow rates >= 1.0 mL/min (P < .05) and a vessel diameter >= 3 mm (P < .05). Higher flow rates did not result in more distinct cooling effects (P > .05). No cooling effects were measured at large (20 mm) antenna to vessel distances (P > .05). Conclusion. Vascular cooling effects occur in hepatic MWA and should be considered in treatment planning. The vascular cooling effect was mainly affected by antenna to vessel distance. Vessel diameter and vascular flow rate played a minor role in vascular cooling effects.
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