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Anal manometry measures circumferential pressures but not axial forces that are responsible for defecation and contribute to fecal continence. Our aims were to investigate these mechanisms by measuring axial rectoanal forces with an intrarectal sphere or a latex balloon fixed at 8, 6, or 4 cm from the anal verge and connected to axial force and displacement transducers. Rectoanal forces and rectal pressures within a latex balloon were measured at baseline (i.e., at rest) and during maneuvers (i.e., squeeze, simulated evacuation, and a Valsalva maneuver) in 12 asymptomatic women and 12 women with symptoms of difficult defecation. Anal resting and squeeze pressures were also assessed by manometry and were similar in control patients and experimental patients. At rest, axial rectoanal forces were directed inward and increased as the device approached the anal verge. Control patients augmented this inward force when they squeezed and exerted an outward force during simulated expulsion and a Valsalva maneuver. The force change during maneuvers was also affected by device location and was highest at 4 cm from the verge. In experimental patients, the force at rest and the change in force during all maneuvers was lower than in control patients. The rectal pressure during a Valsalva maneuver was also lower in experimental patients than in control patients, suggestive of impaired propulsion. In conclusion, a subset of women with defecatory symptoms had weaker axial forces not only during expulsion but also during a Valsalva maneuver and when they squeezed (i.e., contracted) their pelvic floor muscles, suggestive of generalized pelvic floor weakness.

Tape lysis is simple and effective for relieving obstruction, and is not associated with a high rate of recurrent stress urinary incontinence.

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Tactile needle tip control was used to aid perforation during standard tension-free vaginal tape (TVT) placement to treat urinary incontinence. The success and complications of this novel method were compared retrospectively with the reported results of the standard technique. One hundred nine patients had TVT placement between 1998 and 2001, with follow-up continuing into 2002. Preoperatively, the severity of urinary incontinence was assessed objectively. Postoperatively, TVT effectiveness was assessed subjectively by standardized questionnaire, completed by 78 of the 109 patients (72%). Objective 2-year rates for continence or improvement and most complication rates were similar to previously reported results. Needle tip control was helpful in lowering the occurrence of bladder perforation. Longer postoperative recovery times associated with postoperative dysuria or obstruction did not decrease patient satisfaction if the patient experienced a marked improvement in leakage.