@article{oai:nagoya.repo.nii.ac.jp:00017400,
 author = {SONG, MIN-HO},
 issue = {1-2},
 journal = {Nagoya Journal of Medical Science},
 month = {Feb},
 note = {This study demonstrates the risk adjusted cumulative sum analysis of an individual surgical learning curve for acute type A aortic dissection surgery. Thirty consecutive patients were operated by a single surgeon for acute type A aortic dissection from April 2001 to March 2008. Operative variables, mortality, and major morbidities were analyzed. The learning curve was calculated by cumulative sum analysis. The anticipated 30-day operative mortality rate was 20.2±12.7% (range, 3.3–56.7%) and the expected 30-day mortality and morbidity rate was 47.0±13.3 % (range, 21.7–70.6%) according to the Japan SCORE calculator. The observed operative and in-hospital mortality rate was 6.67% (two patients), and the observed major postoperative morbidity rate was 10.0% (three patients). Risk-adjusted cumulative sum analysis revealed that no excess deaths occurred beginning at the seventh case and thereafter. The surgeries for acute type A aortic dissection could be performed at the professionally permissive level from the beginning. Riskadjusted cumulative sum analysis was a useful tool to monitor the performance of the surgical procedure.},
 pages = {51--57},
 title = {A Learning Curve in Aortic Dissection Surgery with the Use of Cumulative Sum Analysis},
 volume = {76},
 year = {2014}
}