Impact of liver cirrhosis on the difficulty of minimally-invasive liver resections: a 1:1 coarsened exact-matched contro
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and Other Interventional Techniques
Impact of liver cirrhosis on the difficulty of minimally‑invasive liver resections: a 1:1 coarsened exact‑matched controlled study Brian K. P. Goh1,2 · Nicholas Syn3 · Ser‑Yee Lee1,2 · Ye‑Xin Koh1,2 · Jin‑Yao Teo1 · Juinn‑Huar Kam1,2 · Peng‑Chung Cheow1,2 · Prema‑Raj Jeyaraj1,2 · Pierce K. Chow1,2 · London L. Ooi1,2 · Alexander Y. Chung1 · Chung‑Yip Chan1,2 Received: 2 April 2020 / Accepted: 16 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Introduction The impact of liver cirrhosis on the difficulty of minimal invasive liver resection (MILR) remains controversial and current difficulty scoring systems do not take in to account the presence of cirrhosis as a significant factor in determining the difficulty of MILR. We hypothesized that the difficulty of MILR is affected by the presence of cirrhosis. Hence, we performed a 1:1 matched-controlled study comparing the outcomes between patients undergoing MILR with and without cirrhosis including the Iwate system and Institut Mutualiste Montsouris (IMM) system in the matching process. Methods Between 2006 and 2019, 598 consecutive patients underwent MILR of which 536 met the study inclusion criteria. There were 148 patients with cirrhosis and 388 non-cirrhotics. One-to-one coarsened exact matching identified approximately exact matches between 100 cirrhotic patients and 100 non-cirrhotic patients. Results Comparison between MILR patients with cirrhosis and non-cirrhosis in the entire cohort demonstrated that patients with cirrhosis were associated with a significantly increased open conversion rate, transfusion rate, need for Pringles maneuver, postoperative, stay, postoperative morbidity and postoperative 90-day mortality. After 1:1 coarsened exact matching, MILR with cirrhosis were significantly associated with an increased open conversion rate (15% vs 6%, p = 0.03), operation time (261 vs 238 min, p
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