OP14.06: A preliminary study on the measurement of anal sphincter in healthy adult women by transluminal dual plane shear wave elastography

To explore the applicability of transluminal dual plane shear wave elastography(TDPSWE) for measuring the anal sphincter(AS) in healthy adult women. TDPSWE was performed on 140 healthy adult women. The thicknesses of internal anal sphincter (IAS) and the deep, superficial, subcutaneous parts of external anal sphincter (EAS) were measured at 3, 6, 9, and 12 o 'clock under resting state(RS) and maximum anal contraction state(MACS), meanwhile, the Young's modulus(YM) of EAS at 3, 6, and 9 o 'clock were measured by real-time shear wave elastography. Compare the differences of the above parameters in different states under the same orientation and different orientations under the same state. 1. EAS at 12 o'clock could not be detected. 2. At MACS, there was no statistically significant difference with the thickness of IAS at 3, 6 and 9 o'clock at RS (P>0.05); Under the same state, the thickness of IAS at 3, 6 and 9 o'clock were compared with each other, the thickness at 6 o'clock was smaller than that of 9 o'clock, with a statistically significant difference (P < 0.05). At MACS, the thickness of the deep, the superficial, subcutaneous parts of EAS and YM of elasticity of EAS at3, 6 and 9 o'clock were higher than those at RS, with statistically significant difference (P < 0.05); Under the same condition, the thickness and YM of elasticity of EAS at 3, 6, and 9 o'clock were compared in pairs, the thickness and YM of elasticity of EAS at 3 o'clock were smaller than the corresponding values of EAS at 6 o'clock and 9 o'clock, the differences were statistically significant (P < 0.05), in addition, there was no statistically significant difference between EAS at 6 o'clock and 9 o'clock (P>0.05). TDPSWE can measure the AS in healthy adult women, preliminarily establish a new method for measuring AS. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.