External anal sphincter volume measurements using 3-dimensional endoanal ultrasound
| Autor: | Kimberly Simmons, Amanda L. Clark, Sarah Hamilton Boyles, Amy Corcoran, W. Thomas Gregory |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Adult
Reproducibility medicine.diagnostic_test business.industry External anal sphincter Ultrasound Anal Canal Reproducibility of Results Obstetrics and Gynecology Intra-rater reliability Anatomy Anal canal Endosonography Internal anal sphincter Imaging Three-Dimensional medicine.anatomical_structure Endoanal ultrasound Humans Medicine Female Single-Blind Method 3D ultrasound business Nuclear medicine |
| Zdroj: | American Journal of Obstetrics and Gynecology. 194:1243-1248 |
| ISSN: | 0002-9378 |
| DOI: | 10.1016/j.ajog.2005.10.822 |
| Popis: | Significant nerve injury to a muscle can be associated with muscle atrophy and volume loss. Three-dimensional (3D) ultrasound can measure muscle volume, but the reproducibility of the technique has not been established for the anal sphincter.Using a 10 MHz 360-degree rotating endoanal probe, we performed 3D endoanal ultrasounds on 9 nulliparous and 23 asymptomatic primiparous subjects at 12 weeks' postpartum. Two blinded examiners measured the length of the external anal sphincter (EAS) from a midsagittal image, and the width of the EAS and internal anal sphincter (IAS) from axial images at mid anal canal. The EAS volume was calculated by repetitively outlining only the EAS in each sequential axial view. Both examiners measured the EAS volumes twice, blinded to previous calculations.The intrarater reliability for EAS volume was 0.79 to 0.89 (intraclass coefficient). The mean difference of the EAS volume between the 2 examiners was 0.5 mL (P = .3, t test). Correlation between the 2 examiners for measuring EAS volume was r = 0.77 (P.001, Pearson's). The "limits of agreement" (between 2 examiners) varied by as much as 40% of the mean volume.Quantitative 3D ultrasound of the anal sphincter is moderately reproducible. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect