Comparative study of anatomical structure and functional characteristics of pelvic floor in normal young men and women by static and dynamic magnetic resonance imaging

doi:10.13418/j.issn.1001-165x.2023.2.05

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Chinese Journal of Clinical Anatomy ›› 2023, Vol. 41 ›› Issue (2) : 143-149. DOI: 10.13418/j.issn.1001-165x.2023.2.05

Comparative study of anatomical structure and functional characteristics of pelvic floor in normal young men and women by static and dynamic magnetic resonance imaging

Zhao Zhiheng¹, Wu Yue¹, Zhang Jing¹, Yang Zitao¹, Zhang Qinyong², Wang Qingwei², Cheng Jingliang¹ , Che Yingyu¹*

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Abstract

Objective To compare the differences of anatomical parameters of pelvic floor between normal young men and women by static and dynamic pelvic floor magnetic resonance imaging. Methods Sixty male and sixty female healthy young volunteers were prospectively collected. All volunteers underwent static and dynamic pelvic floor MRI with 3.0T MRI scanners. The length of H line, the length of M line, the vertical distance from bladder neck (BN) to pubococcygeal line (PCL line) (BN-PCL), the vertical distance from uterus to PCL line (U-PCL), anorectal angle (ARA), levator ani plate angle (LPA), puboprostatic angle (PPA) were measured on static and dynamic maximum force phase sagittal T2WI images, and the static and dynamic differences of the above parameters were calculated. The thickness of puborectal muscle (PRM) and iliococcygeal muscle (ICM) were measured on static axial T2WI images. The differences of the parameters between the two groups were compared whether there was statistical significance or not. Results The static M line length, static and dynamic maximum force phase BN-PCL line length of normal young male were significantly longer than that of female (P<0.05); the thickness of iliococcygeal muscle in male was significantly higher than that in female (P<0.05); by comparing the changes of parameters in the two states, the length changes of H line and BN-PCL line in female were significantly greater than those in male (P<0.05). Conclusions Static and dynamic MRI shows that there are difference in anorectal junction, bladder neck position and pelvic floor supporting structure between men and women, suggesting that clinicians should pay attention to gender and individual differences when evaluating the anatomical structure and function of pelvic floor by magnetic resonance imaging, so as to improve the effective cure rate of pelvic floor dysfunctional diseases (PFD).

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Static and dynamic magnetic resonance imaging; / / Pelvic floor; / / Anatomy; / / Normal youth; / / Gender

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Zhao Zhiheng, Wu Yue, Zhang Jing, Yang Zitao, Zhang Qinyong, Wang Qingwei, Cheng Jingliang , Che Yingyu. Comparative study of anatomical structure and functional characteristics of pelvic floor in normal young men and women by static and dynamic magnetic resonance imaging[J]. Chinese Journal of Clinical Anatomy. 2023, 41(2): 143-149 https://doi.org/10.13418/j.issn.1001-165x.2023.2.05

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