Updating fetal foot length to gestational age references: a chart review of abortion cases from 2012 to 2014
| Autor: | Katelyn Stevens, M. Tschann, Reni Soon, Jennifer Elia, Jennifer Salcedo, Bliss Kaneshiro |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adult
medicine.medical_specialty Adolescent Databases Factual medicine.medical_treatment Population Reference range Gestational Age Abortion Hawaii Ultrasonography Prenatal 03 medical and health sciences Young Adult 0302 clinical medicine Pregnancy Reference Values medicine Humans 030212 general & internal medicine Dilation and evacuation education Retrospective Studies Fetus education.field_of_study Analysis of Variance 030219 obstetrics & reproductive medicine Obstetrics business.industry Foot Obstetrics and Gynecology Gestational age Abortion Induced medicine.disease Reproductive Medicine Female business Foot (unit) |
| Zdroj: | Contraception. 101(1) |
| ISSN: | 1879-0518 |
| Popis: | Objectives We sought to develop an updated fetal foot length-to-gestational week reference range from patient-reported last menstrual period (LMP), ultrasound, and best-estimate for gestational age based on American College of Obstetricians and Gynecologists' (ACOG) pregnancy dating guidelines. Subsequently, we aimed to determine the impact, if any, of race/ethnicity on our findings and compare our measurements to commonly referenced ranges. Methods We performed a chart review of 610 dilation and evacuation records with gestational ages 14 weeks 0 days to 21 weeks 6 days from October 2012 to December 2014 in Honolulu, Hawaii. We analyzed records containing pathology-measured fetal foot length and three gestational age estimation methods using ANOVA tests, determined if race/ethnicity affected fetal foot length, and compared our measurements to previously published studies. Results Linear regression analysis demonstrated that ultrasound-derived gestational age dating provided the best-fit regression formula with an R-squared and adjusted R-squared value of 0.92. Patient body mass index (p=.15), parity (p=.15), and race (p=.99) did not affect the equation. Mean fetal foot length per gestational age differed from historically referenced ranges by 0.36–3.92 mm in either direction. Conclusions Our population's fetal foot length per gestational age differed from ranges typically referenced by pathologists following abortion at all gestational ages, using all three methods of fetal gestational age estimation. As gestational age increased, the variability of fetal foot length measurements per gestational week increased. If post-abortion fetal foot length measurements are obtained, it is important to use an updated reference range. Implications Reference ranges frequently used by pathologists to assess fetal foot length following abortion may be outdated, limiting their utility. If facilities routinely obtain these measurements to estimate gestational age, it is important to use an updated reference range. |
| Databáze: | OpenAIRE |
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