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Multicentre analysis of the learning curve for laparoscopic liver resection of the posterosuperior segments

(2019) BRITISH JOURNAL OF SURGERY. 106(11). p.1512-1522
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Organization
Abstract
Background: Laparoscopic liver resection demands expertise and a long learning curve. Resection of the posterosuperior segments is challenging, and there are no data on the learning curve. The aim of this study was to evaluate the learning curve for laparoscopic resection of the posterosuperior segments. Methods: A cumulative sum (CUSUM) analysis of the difficulty score for resection was undertaken using patient data from four specialized centres. Risk-adjusted CUSUM analysis of duration of operation, blood loss and conversions was performed, adjusting for the difficulty score of the procedures. A receiver operating characteristic (ROC) curve was used to identify the completion of the learning curve. Results: According to the CUSUM analysis of 464 patients, the learning curve showed an initial decrease in the difficulty score followed by an increase and, finally, stabilization. More patients with cirrhosis or previous surgery were operated in the latest phase of the learning curve. A smaller number of wedge resections and a larger number of anatomical resections were performed progressively. Dissection using a Cavitron ultrasonic surgical aspirator and the Pringle manoeuvre were used more frequently with time. Risk-adjusted CUSUM analysis showed a progressive decrease in operating time. Blood loss initially increased slightly, then stabilized and finally decreased over time. A similar trend was found for conversions. The learning curve was estimated to be 40 procedures for wedge and 65 for anatomical resections. Conclusion: The learning curve for laparoscopic liver resection of the posterosuperior segments consists of a stepwise process, during which accurate patient selection is key.
Keywords
LEFT LATERAL SECTIONECTOMY, MAJOR HEPATECTOMY, LESIONS, FEASIBILITY, DIFFICULTY, SURGEONS, PROPOSAL, OUTCOMES

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MLA
Berardi, Giammauro, et al. “Multicentre Analysis of the Learning Curve for Laparoscopic Liver Resection of the Posterosuperior Segments.” BRITISH JOURNAL OF SURGERY, vol. 106, no. 11, 2019, pp. 1512–22.
APA
Berardi, G., Aghayan, D., Fretland, Å., Elberm, H., Cipriani, E., Spagnoli, A., … Troisi, R. (2019). Multicentre analysis of the learning curve for laparoscopic liver resection of the posterosuperior segments. BRITISH JOURNAL OF SURGERY, 106(11), 1512–1522.
Chicago author-date
Berardi, Giammauro, D Aghayan, ÅA Fretland, H Elberm, E Cipriani, A Spagnoli, Roberto Montalti, et al. 2019. “Multicentre Analysis of the Learning Curve for Laparoscopic Liver Resection of the Posterosuperior Segments.” BRITISH JOURNAL OF SURGERY 106 (11): 1512–22.
Chicago author-date (all authors)
Berardi, Giammauro, D Aghayan, ÅA Fretland, H Elberm, E Cipriani, A Spagnoli, Roberto Montalti, Wim Ceelen, L Aldrighetti, M Abu Hilal, B Edwin, and Roberto Troisi. 2019. “Multicentre Analysis of the Learning Curve for Laparoscopic Liver Resection of the Posterosuperior Segments.” BRITISH JOURNAL OF SURGERY 106 (11): 1512–1522.
Vancouver
1.
Berardi G, Aghayan D, Fretland Å, Elberm H, Cipriani E, Spagnoli A, et al. Multicentre analysis of the learning curve for laparoscopic liver resection of the posterosuperior segments. BRITISH JOURNAL OF SURGERY. 2019;106(11):1512–22.
IEEE
[1]
G. Berardi et al., “Multicentre analysis of the learning curve for laparoscopic liver resection of the posterosuperior segments,” BRITISH JOURNAL OF SURGERY, vol. 106, no. 11, pp. 1512–1522, 2019.
@article{8634864,
  abstract     = {{Background: Laparoscopic liver resection demands expertise and a long learning curve. Resection of the posterosuperior segments is challenging, and there are no data on the learning curve. The aim of this study was to evaluate the learning curve for laparoscopic resection of the posterosuperior segments.
Methods: A cumulative sum (CUSUM) analysis of the difficulty score for resection was undertaken using patient data from four specialized centres. Risk-adjusted CUSUM analysis of duration of operation, blood loss and conversions was performed, adjusting for the difficulty score of the procedures. A receiver operating characteristic (ROC) curve was used to identify the completion of the learning curve.
Results: According to the CUSUM analysis of 464 patients, the learning curve showed an initial decrease in the difficulty score followed by an increase and, finally, stabilization. More patients with cirrhosis or previous surgery were operated in the latest phase of the learning curve. A smaller number of wedge resections and a larger number of anatomical resections were performed progressively. Dissection using a Cavitron ultrasonic surgical aspirator and the Pringle manoeuvre were used more frequently with time. Risk-adjusted CUSUM analysis showed a progressive decrease in operating time. Blood loss initially increased slightly, then stabilized and finally decreased over time. A similar trend was found for conversions. The learning curve was estimated to be 40 procedures for wedge and 65 for anatomical resections.
Conclusion: The learning curve for laparoscopic liver resection of the posterosuperior segments consists of a stepwise process, during which accurate patient selection is key.}},
  author       = {{Berardi, Giammauro and Aghayan, D and Fretland, ÅA and Elberm, H and Cipriani, E and Spagnoli, A and Montalti, Roberto and Ceelen, Wim and Aldrighetti, L and Abu Hilal, M and Edwin, B and Troisi, Roberto}},
  issn         = {{0007-1323}},
  journal      = {{BRITISH JOURNAL OF SURGERY}},
  keywords     = {{LEFT LATERAL SECTIONECTOMY,MAJOR HEPATECTOMY,LESIONS,FEASIBILITY,DIFFICULTY,SURGEONS,PROPOSAL,OUTCOMES}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{1512--1522}},
  title        = {{Multicentre analysis of the learning curve for laparoscopic liver resection of the posterosuperior segments}},
  url          = {{http://dx.doi.org/10.1002/bjs.11286}},
  volume       = {{106}},
  year         = {{2019}},
}

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