Effect of e-learning on quality of cervical-length measurements

M. A. Van Os, A. J. Van Der Ven, P. M. Bloemendaal, E. Pajkrt, C. J M De Groot, B. W J Mol, M. C. Haak

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Objectives To assess the effect of implementation of a newly developed e-learning module on the quality of cervical-length measurements. Methods With the introduction of cervical-length (CL) measurement in a research setting, a CL measurement e-learning module (CLEM) was developed with the purpose to enhance the knowledge and skills of experienced ultrasonographers. CLEM was designed specifically for ultrasonographers who perform ultrasound in a general obstetrical practice but who do not regularly perform CL measurements. CLEM consists of five theoretical questions and three caliper-placement tests to learn the CL measurement technique. The quality of the CL measurements of CLEM participants was compared with images of non-participants using a CL measurement image score (CIS), defined as the sum of six items which assess the quality of the image. Each CLEM participant submitted five CL images and the images of non-CLEM participants were selected randomly from an ultrasound database. Results The CIS of the CLEM participants (n = 61) were significantly higher than those of non-CLEM participants (n = 23) (164.9 vs 155.6, respectively; P = 0.03). Visualization of the internal os and positioning of the calipers on the internal and external ora were found to have significantly higher CIS among the CLEM participants than among the non-CLEM participants (P = 0.001 and P < 0.001, respectively). Conclusions Introducing CLEM may improve the quality of CL measurements obtained by trained and untrained sonographers.

Original languageEnglish
Pages (from-to)327-331
Number of pages5
JournalUltrasound in Obstetrics and Gynecology
Issue number3
Publication statusPublished - 1 Jan 2015
Externally publishedYes


  • cervical length
  • e-learning
  • preterm birth

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