Melissa L. Dawson, Nima M. Shah, Rebecca C. Rinko, Clinton Veselis, and Kristene E. Whitmore are in the Department of OB/GYN at Drexel University College of Medicine in Philadelphia.
Dr. Whitmore discloses that she receives grants/research support from Allergan (makers of Botox), as well as from Astellas Pharma US and Coloplast Corp. Drs. Dawson, Shah, Rinko, and Veselis report no potential conflict of interest relevant to this article, which originally appeared in The Journal of Family Practice (2017;66[12]:722-728).
The external pelvic examination begins with visual inspection of the vulva, labia majora, and labia minora. Often, this is best accomplished gently with a gloved hand and a cotton swab. This inspection may reveal changes in pubic hair distribution, vulvar skin disorders, lesions, masses, cracks, or fissures. Inspection may also reveal redness and pain typical of vestibulitis, a flattening and pallor of the labia that suggests estrogen deficiency, or pelvic organ prolapse.
The internal pelvic examination begins with a manual evaluation of the muscles of the pelvic floor, uterus, bladder, urethra, anus, and adnexa. Make careful note of any unusual tenderness or pelvic masses. Pelvic floor muscles (PFMs) should voluntarily contract and relax and are not normally tender to palpation. Pelvic organ prolapse and/or hypermobility of the bladder may indicate a weakening of the endopelvic fascia and may cause sexual pain. The size and flexion of the uterus, tenderness in the vaginal fornix possibly indicating endometriosis, and adnexal fullness and/or masses should be identified and evaluated.
Neurologic exam of the pelvis will involve evaluation of sensory and motor function of both lower extremities and include a screening lumbosacral neurologic examination. Lumbosacral examination includes assessment of PFM strength, anal sphincter resting tone, voluntary anal contraction, and perineal sensation. If abnormalities are noted in the screening assessment, a complete comprehensive neurologic examination should be performed.
It’s important to assess pelvic floor muscle strength
Sexual function is associated with normal PFM function.13,14 The PFMs, particularly the pubococcygeus and iliococcygeus, are responsible for involuntary contractions during orgasm.13 Orgasm has been considered a reflex, which is preceded by increased blood flow to the genital organs, tumescence of the vulva and vagina, increased secretions during sexual arousal, and increased tension and contractions of the PFMs.15
Lowenstein et al found that women with strong or moderate PFM contractions scored significantly higher on both orgasm and arousal domains of the Female Sexual Function Index (FSFI), compared with women with weak PFM contractions.16 Orgasm and arousal functions may be associated with PFM strength, with a positive association between pelvic floor strength and sexual activity and function.17,18
The function and dysfunction of the PFMs have been characterized as normal, overactive (high tone), underactive (low tone), and nonfunctioning.