Identification of experimental bladder sensitivity among dysmenorrhea sufferers

Area of Science:

• Urology
• Pain Medicine
• Gynecology

Background:

• Dysmenorrhea is a known risk factor for chronic pain conditions, including bladder pain syndrome.
• Limited research has explored bladder pain sensitivity in asymptomatic women with dysmenorrhea.
• The role of psychological factors in symptom reporting requires further investigation.

Purpose of the Study:

• To determine if bladder hypersensitivity is more prevalent in women with moderate-to-severe dysmenorrhea, independent of other chronic pain conditions, anxiety, and depression.
• To investigate dysmenorrhea as a potential early indicator of visceral or widespread pain hypersensitivity.
• To enhance understanding of potential precursors to bladder pain syndrome.

Main Methods:

• Comparison of two cohorts: women with moderate-to-severe dysmenorrhea (n=98) and those with minimal/no menstrual pain (n=35).
• Assessment of bladder sensitivity via rapid bladder filling, sonographic measurement of bladder volume, and complementary measures (rapid filling test, palpation, daily diaries).
• Evaluation of anxiety and depression using NIH Patient-Reported Outcomes Measurement Information System (PROMIS) measures.

Main Results:

• Women with moderate-to-severe dysmenorrhea reported more urinary symptoms, had lower maximum bladder capacity (498 mL vs 619 mL), and experienced more evoked bladder pain (25/100 VAS vs 12/100 VAS) compared to controls.
• Menstrual pain severity independently predicted evoked bladder pain, irrespective of anxiety or depression.
• A significant proportion (24%) of women with moderate-to-severe dysmenorrhea exhibited provoked bladder pain, correlating with heightened sensitivity in other bladder provocation tests.

Conclusions:

• Moderate-to-severe dysmenorrhea is associated with heightened pain response to bladder distension.
• Noninvasive bladder provocation methods warrant further longitudinal testing in women with dysmenorrhea.
• Identifying dysmenorrhea may aid in predicting individuals at risk for developing bladder pain or other chronic pain conditions.