4.6 Article

Association of standardized liver volume and body mass index with outcomes of minimally invasive liver resections

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SPRINGER
DOI: 10.1007/s00464-022-09534-x

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Laparoscopic liver; Laparoscopic hepatectomy; Minimally invasive liver; Minimally invasive hepatectomy; Anthropometric measures; Difficulty score

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This study analyzed the effects of body mass index (BMI) and standardized liver volume (SLV) on outcomes in minimally invasive liver resections (MILR). The results showed that high BMI and SLV were associated with increased blood loss and operative conversions, while low BMI was associated with a higher risk of major complications.
Introduction While minimally invasive liver resections (MILR) have demonstrated advantages in improved post-operative recovery, widespread adoption is hampered by inherent technical difficulties. Our study attempts to analyze the role of anthropometric measures in MILR-related outcomes. Methods Between 2012 and 2020, 676 consecutive patients underwent MILR at the Singapore General Hospital of which 565 met study criteria and were included. Patients were stratified based on Body Mass Index (BMI) as well as Standardized Liver Volumes (SLV). Associations between BMI and SLV to selected peri-operative outcomes were analyzed using restricted cubic splines. Results A BMI of >= 29 was associated with increase in blood loss [Mean difference (MD) 69 mls, 95% CI 2 to 137] as well as operative conversions [Relative Risk (RR) 1.63, 95% CI 1.02 to 2.62] among patients undergoing MILR while a SLV of 1600 cc or higher was associated with an increase in blood loss (MD 30 mls, 95% CI 10 to 49). In addition, a BMI of <= 20 was associated with an increased risk of major complications (RR 2.25, 95% 1.16 to 4.35). The magnitude of differences observed in these findings increased with each unit change in BMI and SLV. Conclusion Both BMI and SLV were useful anthropometric measures in predicting peri-operative outcomes in MILR and may be considered for incorporation in future difficulty scoring systems for MILR.

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