2083229 Accuracy of Ultrasound Estimated Fetal Weight Performed by Residents During Labor

Abstract

parapharyngeal, and esophageal biopsies. Also included will be examples of biopsies of masses that extend into the adjacent superior mediastinum. The various approaches to lesions in these difficult to reach locations will be reviewed. The use of color Doppler and optimal patient positioning will be highlighted.Results: Procedures can be performed with ultrasound alone or as a combined procedure using both CT and ultrasound. A benefit of the combined CT-ultrasound procedure is that ultrasound decreases the time needed to reach the lesion with an off axial approach as well as decreases the radiation dose. The CT can then verify needle position within the lesion.Conclusions: Ultrasound-guided biopsies can be performed safely and efficiently in the deep spaces of the head and neck. Using the techniques described in this presentation, lesions that are seemingly inaccessible can be biopsied with ultrasound guidance. Ultrasound provides numerous advantages over CT in terms of lower cost, no radiation exposure, and multiplanar approach. Algorithm for Skeletal Dysplasias by Prenatal Ultrasound: Emphasis on Predicting Lethality Kathryn Milks, Keyanoosh Hosseinzadeh Radiology, Wake Forest Baptist Medical Center, Winston Salem, NC, United StatesObjectives: We describe a simplified algorithm for determining lethality of a suspected skeletal dysplasia by prenatal ultrasound.Goals Understand when to consider the diagnosis of a skeletal dysplasia Recognize accurate predictors that constitute a lethal skeletal dysplasiaRecognize sonographic features of the major lethal skeletal dysplasias and the unique features that distinguish one from another Methods: A literature review of all predictors of lethality in skeletal dysplasias was performed. The most reliable predictors of lethality were determined using relative sensitivity, specificity, negative predictive value, and positive predictive value. We combined the most reliable predictors of lethality to create an original, logical, and simple algorithm to accurately determine those skeletal dysplasias that are incompatible with life.

Accuracy of sonographic fetal weight estimation in a tertiary care hospital in Bharatpur, Nepal

“…The mean absolute percentage error for ultrasound estimated weight was 8.76 ± 7.51%. In the studies done by Colman et al 10 Dimasi et al 11 Houze et al, 12 and Lafont et al 13 the mean absolute percentage errors by ultrasound method were found to be 7.0%, 5.71%, 7% and 7.2% respectively which were similar to our study. These results are also consistent with previously observed findings that the mean absolute percentage error of predicting birth weight varies from 6% to 12% of actual birth weight.…”

“…7 Determination of weight within 10% of the actual birth weight was considered acceptable accuracy. 5 In our study, the percentage of estimates within ± 10 % of the actual birth weight was found to be 65% which is similar to the findings of the study done by Bajracharya et al, 5 Lafont et al 13 Dimasi et al, 11 Bolanka et al 14 and Colman et al 10 in which the percentage of estimates within ± 10% of the actual birth weight were found to be 60%, 69.1%, 69.6%, 72.25% and 75% respectively. These results are also consistent with what have been previously observed that 40-76% of the estimates were within 10% of actual birth weight.…”