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非小細胞肺癌(NSCLC)に対する標準術式は肺葉切除術+リンパ節郭清であるが,近年,末梢小型NSCLCにおける区域切除術の葉切除術に対する非劣性が示され,今後区域切除術の役割は増すものと思われる1).理想的な肺区域切除術には,腫瘍から適切なマージンをとった区域切離ラインの設定と,区域間形成血流を温存した適切な切離ラインの形成が重要である.従来の含気虚脱法は,その同定に難渋することも多い.当科では2020年1月からインドシアニングリーン(ICG)静注法によって区域間を描出し,切離ラインを決定している.2020年1月~2022年4月に施行した肺癌区域切除例16例を後方視的に検討し,ICG法の有用性を報告する.
The most important issues in the segmentectomy for lung cancer, are the accurate establishment of the suture line and to reduce local recurrence at the resection margin. There are two methods:bronchial dominance as an indicator and intravenous indocyanine green (ICG) as an indicator of blood flow dominance. We have been performing identification by ICG since 2020. After the pulmonary arteriovenous and bronchus are resected, ICG is injected intravenously, and the borders between fluorescent and non-fluorescent area is identified using a ICG thoracoscope, and are resected using an electro-surgical unit or stapler. After that, additional ICG is administered, pulmonary blood flow is checked, and if an uncontaminated area is identified, an additional resection is performed. We have retrospectively reviewed 16 cases of ICG method for lung cancer (all at clinical stageⅠ) performed since January 2020, and no recurrence has been observed. We present the details of these cases and report the usefulness of the ICG fluorescence system.
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