Changes of the structure of normal female pelvic floors based on magnetic resonance imaging at rest and during maximal pelvic strain

doi:10.3969/j.issn.2095-4344.2013.04.013

Abstract

Abstract:

BACKGROUND: Magnetic resonance imaging can accurately evaluate the entire structure of pelvic floor due to its advantages of non-radioactivity, good soft tissue contrast and multi-level and multi-axial scan imaging.
OBJECTIVE: To study the changes of structure of normal female pelvic floors based on magnetic resonance imaging at rest and during maximal pelvic strain in order to establish normal criteria for the evaluation of pelvic floor dysfunction.
METHODS: Twenty-three asymptomatic female and female patients with other pelvic disorders were examined with pelvic dynamic magnetic resonance imaging at rest and during maximal pelvic strain. The distance of bladder neck, cervix and the anorectal to pubococcygeal line in different conditions in mid-sagittal plane, and the length of H-line (from anorectal to the lower edge of pubic symphysis) and M-line (from anorectal to pubococcygeal line) of the HMO system were measured, the change of the levator angle in coronal plane through the middle of the anal canal, and the change of the area of diaphragmatic hiatus in the axial view through the lower edge of pubic symphysis were measured.
RESULTS AND CONCLUSION: Compared with rest condition, the connections of bladder neck, cervix and the anorectal were decreased during maximal pelvic strain; the levator angle and the area of diaphragmatic hiatus were increased during maximal pelvic strain; the length of H-line and M-line was slightly increased during maximal pelvic strain, and there was significant difference (P < 0.05). The position of the pelvic organs of normal female at rest and during maximal pelvic strain changed, in the pubococcygeal line system and HMO system measurement, the decreasing degree of pelvic organs was not more than the normal range degree. In pelvic dynamic magnetic resonance imaging, the levator angle and the area of diaphragmatic hiatus were slightly increased.

Key words: bone and joint implants, photographs and images of bone and joint, MRI, pelvic floor, pubococcygeal line, pelvic strain, anatomy, other grants-supported paper

CLC Number:

R318

Han Yuan-yuan, Li Yong, Zhong Jing-lian, Pan Heng, Wang Dong-ye, Shi Jie. Changes of the structure of normal female pelvic floors based on magnetic resonance imaging at rest and during maximal pelvic strain[J]. Chinese Journal of Tissue Engineering Research, 2013, 17(4): 647-652.

Figures/Tables 3

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