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Fig. 3 | Egyptian Journal of Neurosurgery

Fig. 3

From: Assessment of the learning curve of video-assisted thoracoscopic sympathectomy in a single neurosurgical trainee: a cumulative summation analysis

Fig. 3

CUSUM analysis of operating time revealed beginning of improvement at the 9th procedure, controlling the duration at the 27th procedure and reaching steady state at the 53rd procedure. Between the 39th and 42nd procedures there was an upward deflection of the curve above the upper CUSUM line (out-of-control process) due to OR team replacement

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