Exponentially weighted moving average chart as a suitable tool for nuchal translucency quality review

Abstract

The EWMA provides a universal, easy and efficient tool for NT quality review when the prompt and effective detection of suboptimal performance is desired.

Crown‐rump length audit plots with the use of operator‐specific PAPP‐A and β‐hCG median MoM

“…Quality control methods have been described and recommended for NT and the ductus venosus assessment, with the use of different approaches: a) image categorical features scoring b) distribution analysis or c) prospective plotting . The image‐scoring system is mostly used for training and credentialing.…”

“…Because both NT and CRL measurement deviations have been shown to have a significant impact on trisomy 21‐risk estimation, establishing international standards and sticking to them in clinical practice are of paramount importance . To monitor NT measurements and assure that quality is maintained, quality control programs using either quantitative parameters or plotting methods are currently recommended by international societies . Surprisingly, recommendations for CRL audit are scarce.…”

Prenatal screening and diagnosis of genetic abnormalities: SEGO, SEQCML, AEDP consensus recommendations

“…An alternative or complementary approach is the CUSUM method (cumulative sum) [29][30][31][32]. This method is based on the assumption that a natural deviation around a target value occurs in all clinical measurements as a result of the nature of the measurement process itself, which is accepted as normal.…”

Cribado y diagnóstico prenatal de anomalías genéticas: recomendaciones de consenso SEGO, SEQCML, AEDP

“…Como alternativa o complemento se propone el método CUSUM (cumulative sum) [29][30][31][32]. Este método se basa en que, en cualquier proceso médico, existe una cierta variabilidad natural alrededor de un valor establecido como diana que corresponde a la naturaleza del proceso y se considera normal.…”