Continuous independent quality control for fetal ultrasound biometry provided by the cumulative summation technique

Abstract

Objective To apply the cumulative summation (CUSUM

Learning curve analysis of robot-assisted radical hysterectomy for cervical cancer: initial experience at a single institution

“…In the field of obstetrics and gynecology, studies using the CUSUM method have been limited to assessing proficiency in procedures such as embryo transfer for in vitro fertilization [35], certain diagnostic ultrasound procedures [36,37], and fetoscopic laser ablation [38]. To our knowledge, this is the first report to evaluate the learning curve of robot-assisted surgery in gynecology using the CUSUM method.…”

Longitudinal Assessment of Examiner Experience and the Accuracy of Sonographic Fetal Weight Estimation at Term

“…The individual learning curves of the examiners were analyzed by the cumulative summation (CUSUM) technique . We assessed learning CUSUM curves for each examiner, plotting a cumulative score based on the absolute percentage error.…”

“…Unacceptable performance could be declared if it crossed 2 consecutive boundary lines from below. At the beginning of the process, the starting point 0 could be counted as the first intersection …”

Cumulative summation test for learning curve (LC-CUSUM) in outpatient hysteroscopy

“…As reported previously, the level of acceptable type I error was at α = 0.05 (probability of claiming that the trainee is competent while they are not) and type II error at β = 0.20 (probability of rejecting the fact that the trainee has reached their competency). Based on previously published data, our sample weight X = 0 (success) was calculated at 0.0080043, sample weight X = 1 (failure) at -1.38629, the Average Run Length ARL 0 = 40 and the decision interval h = 2.5 [5][6][7][8][9] …”

“…Numerous authors have emphasized the discrepancies regarding the number of the surgical procedures one need to perform to be deemed competent [1]. Cumulative sum control charts (CUSUM) are widely applied for industrial quality control, and have been found effective for measuring and monitoring healthcare outcomes [2][3][4][5]. A new statistical tool, the cumulative summation test for learning curve (LC-CUSUM), was developed to address that issue and to assist in assessment of the learning curve (LC) and competency of a given trainee [6][7][8][9].…”