Background: The proper evaluation of the pelvic floor muscles (PFM) is essential for choosing
the correct treatment. Currently, there is no gold standard for the assessment of
female PFM function. Objective: To determine the correlation between vaginal palpation, vaginal squeeze pressure,
and electromyographic and ultrasonographic variables of the female PFM. Method: This cross-sectional study evaluated 80 women between 18 and 35 years of age who
were nulliparous and had no pelvic floor dysfunction. PFM function was assessed
based on digital palpation, vaginal squeeze pressure, electromyographic activity,
bilateral diameter of the bulbocavernosus muscles and the amount of bladder neck
movement during voluntary PFM contraction using transperineal bi-dimensional
ultrasound. The Pearson correlation was used for statistical analysis (p<0.05).
Results: There was a strong positive correlation between PFM function and PFM contraction
pressure (0.90). In addition, there was a moderate positive correlation between
these two variables and PFM electromyographic activity (0.59 and 0.63,
respectively) and movement of the bladder neck in relation to the pubic symphysis
(0.51 and 0.60, respectively). Conclusions: This study showed that there was a correlation between vaginal palpation, vaginal
squeeze pressure, and electromyographic and ultrasonographic variables of the PFM
in nulliparous women. The strong correlation between digital palpation and PFM
contraction pressure indicated that perineometry could easily be replaced by PFM
digital palpation in the absence of equipment.