Validation of new ultrasound parameters for quantifying pelvic floor muscle contraction

S. H. Yang, W. C. Huang, S. Y. Yang, E. Yang, J. M. Yang

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Objective To determine the reliability and validity of new ultrasound parameters, measured in the polar coordinate system, for quantifying pelvic floor muscle action. Methods This was a prospective study, from January 2005 to December 2007, in 209 women with urodynamic stress incontinence, to validate new ultrasound parameters for quantifying pelvic floor muscle contraction. The examination of each patient included intravaginal digital palpation of voluntary pelvic floor muscle contractility and an ultrasound assessment of the positions of the bladder neck and anorectal junction at rest and during pelvic floor muscle contraction. The position of the bladder neck was expressed by bladder neck angle and bladder neck distance from the lower border of the pubic symphysis, and the position of the anorectal junction was expressed by the levator hiatal angle and sagittal hiatal diameter. The vector lengths of the motion of the bladder neck and anorectal junction during pelvic floor muscle contraction were calculated from the positions at rest and during pelvic floor muscle contraction by mathematical formulae. Results There was good inter- and intraobserver reliability of measurement of ultrasound parameters on stored volumes. During pelvic floor muscle contraction, elevated bladder neck distance and shortened sagittal hiatal diameter were valid parameters representing stronger pelvic floor muscle contractility, with shortened sagittal hiatal diameter having the best correlation (r =-0.348, P <0.001). Conclusion The methods used in this study appear to be reliable for quantifying pelvic floor muscle action. The bladder neck distance with respect to the lower border of the pubic symphysis and the sagittal hiatal diameter were both valid parameters reflecting PFM contractility.

Original languageEnglish
Pages (from-to)465-471
Number of pages7
JournalUltrasound in Obstetrics and Gynecology
Volume33
Issue number4
DOIs
Publication statusPublished - Apr 2009

Fingerprint

Pelvic Floor
Muscle Contraction
Urinary Bladder
Pubic Symphysis
Muscles
Palpation
Urodynamics
Reproducibility of Results
Prospective Studies

Keywords

  • Intravaginal digital palpation
  • Levator hiatal parameter
  • Pelvic floor muscle contraction
  • Polar coordinate system
  • Stress urinary incontinence

ASJC Scopus subject areas

  • Obstetrics and Gynaecology
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Reproductive Medicine

Cite this

Validation of new ultrasound parameters for quantifying pelvic floor muscle contraction. / Yang, S. H.; Huang, W. C.; Yang, S. Y.; Yang, E.; Yang, J. M.

In: Ultrasound in Obstetrics and Gynecology, Vol. 33, No. 4, 04.2009, p. 465-471.

Research output: Contribution to journalArticle

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