To address the limitations of traditional minimally invasive thermal ablation technology such as poor conformability, carbonization and electromagnetic radiation, this paper proposes a steam thermal ablation technology that uses saturated steam internal energy to replace the traditional electromagnetic radiation energy. Through the steam thermal ablation system and the steam thermal ablation needle designed based on simulation, the ex vivo pig liver experiments were carried out. The results have the characteristics of the maximum ablation axis ratio (short diameter / long diameter) and non-carbonization with the same type of thermal ablation technology. Based on the near-infrared light, in this paper the curative effect of the reduced scattering coefficient of the steam thermal ablation results was evaluated. The reduced scattering coefficients of the coagulation area all exceeded 16, reaching the completely damaged state, which verified that the steam thermal ablation can effectively inactivate the tumor cells.
针对传统的微创热消融技术存在的适形性差、碳化和电磁辐射等缺陷，该文提出以饱和蒸汽的内能代替传统电磁辐射能的蒸汽热消融技术。通过搭建的蒸汽热消融系统和基于仿真设计的蒸汽热消融针，进行了离体猪肝组织实验，其结果具有同类型热消融技术中最大消融轴比（短径/长径）和无碳化的特点。该文基于近红外光谱对蒸汽热消融结果进行了约化散射系数的疗效评估，其凝固区域约化散射系数均在16以上，达到完全损毁状态，验证了蒸汽热消融可以实现肿瘤细胞灭活。.
Keywords: electromagnetic radiation; non-carbonization; reduced scattering coefficient; steam thermal ablation; steam thermal ablation needle.