In-office Assessment of Voiding Function Following Botox Injection for Overactive Bladder

2019-11-13 17:56:55 | BioPortfolio


The purpose of this study is to describe the rates of elevated post void residual (PVR) (defined as >200mL) in our patients following Botox injection, as well as to document how many patients required treatment with clean intermittent self-catheterization (CISC).


Approximately 16% of all women have symptoms of overactive bladder (OAB), whereas 30% of the elderly population are affected. Patients who do not respond to, or cannot tolerate, first and second line therapy with behavioral modifications and pharmacotherapy are offered additional treatment options. Third line therapy involves injection of onabotulinumtoxinA (Botox©, Allergen) into the bladder detrusor muscle.

Botox was approved for use for the diagnosis of OAB in 2013. Cincinnati Urogynecology Associates, TriHealth Inc. has incorporated intravesical Botox injections into the management algorithm for refractory OAB, since 2014. Currently, patients who fail to improve after a trial of first and second line therapy are offered treatment with Botox.

The standard practice in our office is to request patients return to the office for a routine PVR measurement using straight catheterization within approximately two-four weeks following their Botox injection. This is done regardless if patients are exhibiting symptoms of urinary retention. Patients with an elevated PVR are treated with CISC if they are symptomatic.

Nevertheless, many studies suggest that patients are accurately able to self-identify symptoms of urinary retention, and treating asymptomatic urinary retention may not be necessary.

We aim to describe how many patients with PVR >200mL had symptoms following intravesical injection of Botox for OAB.

Study Design


Overactive Bladder


Not yet recruiting


TriHealth Inc.

Results (where available)

View Results


Published on BioPortfolio: 2019-11-13T17:56:55-0500

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Medical and Biotech [MESH] Definitions

Symptom of overactive detrusor muscle of the URINARY BLADDER that contracts with abnormally high frequency and urgency. Overactive bladder is characterized by the frequent feeling of needing to urinate during the day, during the night, or both. URINARY INCONTINENCE may or may not be present.

Symptoms of disorders of the lower urinary tract including frequency, NOCTURIA; urgency, incomplete voiding, and URINARY INCONTINENCE. They are often associated with OVERACTIVE BLADDER; URINARY INCOMPETENCE; and INTERSTITIAL CYSTITIS. Lower urinary tract symptoms in males were traditionally called PROSTATISM.

A HERNIA-like condition in which the weakened pelvic muscles cause the URINARY BLADDER to drop from its normal position. Fallen urinary bladder is more common in females with the bladder dropping into the VAGINA and less common in males with the bladder dropping into the SCROTUM.

Involuntary discharge of URINE as a result of physical activities that increase abdominal pressure on the URINARY BLADDER without detrusor contraction or overdistended bladder. The subtypes are classified by the degree of leakage, descent and opening of the bladder neck and URETHRA without bladder contraction, and sphincter deficiency.

An abnormal passage in the URINARY BLADDER or between the bladder and any surrounding organ.

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