Objective To assess intralevator Botulinum toxin type A (Botox) injections for refractory myofascial pelvic pain with short tight pelvic floor. Methods Retrospective cohort study of all women with intralevator Botox injection (100-300 Units) from 2005 through 2010 for refractory myofascial pelvic pain. Primary outcomes were self-reported pain on palpation and symptom improvement. Secondary outcomes included post-injection complications and repeat injection. Pain was assessed during digital palpation of the pelvic floor muscles using a scale of 0-10, with 10 being the worst possible pain. Follow-up occurred at <6 weeks post-injection and again at ≥ 6 weeks. Data are presented as median (interquartile range) or proportion. Results Thirty-one patients met eligibility criteria; 2 were lost to follow up and excluded. Median age was 55.0 years (38.0-62.0). Before Botox injection, median pain score was 9.5 (8.0-10.0). Twenty-nine patients (93.5%) returned for the first follow-up visit; 79.3% reported improvement in pain, while 20.7% reported no improvement. Median pain with levator palpation was significantly lower than before injection (P<0.0001). Eighteen women (58.0%) had a second follow-up visit with a median pain score that remained lower than before injection (P<0.0001). Fifteen (51.7%) women elected to have repeat Botox injection; the median time to repeat injection was 4.0 (3.0-7.0) months. Three (10.3%) women developed de-novo urinary retention, 2 (6.9%) reported fecal incontinence and 3 (10.3%) reported constipation and/or rectal pain; all side effects resolved spontaneously. Conclusions Intralevator injection of Botox demonstrates effectiveness in women with refractory myofascial pelvic pain with few, self-limiting adverse effects.
Objective-To assess intralevator Botulinum toxin type A (Botox) injections for refractory myofascial pelvic pain with short tight pelvic floor.Methods-Retrospective cohort study of all women with intralevator Botox injection (100-300 Units) from 2005 through 2010 for refractory myofascial pelvic pain. Primary outcomes were selfreported pain on palpation and symptom improvement. Secondary outcomes included postinjection complications and repeat injection. Pain was assessed during digital palpation of the pelvic floor muscles using a scale of 0-10, with 10 being the worst possible pain. Follow-up occurred at <6 weeks post-injection and again at ≥ 6 weeks. Data are presented as median (interquartile range) or proportion.Results-Thirty-one patients met eligibility criteria; 2 were lost to follow up and excluded. Median age was 55.0 years (38.0-62.0). Before Botox injection, median pain score was 9.5 (8.0-10.0). Twenty-nine patients (93.5%) returned for the first follow-up visit; 79.3% reported improvement in pain, while 20.7% reported no improvement. Median pain with levator palpation was significantly lower than before injection (P<0.0001). Eighteen women (58.0%) had a second follow-up visit with a median pain score that remained lower than before injection (P<0.0001). Fifteen (51.7%) women elected to have repeat Botox injection; the median time to repeat injection was 4.0 (3.0-7.0) months. Three (10.3%) women developed de-novo urinary retention, 2 (6.9%) reported fecal incontinence and 3 (10.3%) reported constipation and/or rectal pain; all side effects resolved spontaneously.Conclusions-Intralevator injection of Botox demonstrates effectiveness in women with refractory myofascial pelvic pain with few, self-limiting adverse effects.
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