E-Posters-Post-void Residual Measurements by Bladder Ultrasound in Obese Women: Are they Accurate?

Post-void Residual Measurements by Bladder Ultrasound in Obese Women: Are they Accurate? - Dina Bastawros, MD

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The study aimed to determine the accuracy of portable bladder ultrasound in assessing postvoid residual (PVR) in obese women compared to non-obese women. A total of 133 women participated in the study, with 57 classified as obese (BMI ≥30 kg/m2) and 76 as non-obese (BMI <30 kg/m2). The primary outcome was the difference between ultrasound measurements and catheterized measurements of PVR.<br /><br />The key findings of the study were as follows:<br /><br />- Portable bladder ultrasound was found to be accurate within 50 mL in assessing PVR in the outpatient setting.<br />- The accuracy of bladder ultrasound in PVR assessment was not affected by factors such as age, stage of pelvic organ prolapse according to the Pelvic Organ Prolapse Quantification (POP-Q) system, or location of pelvic organ prolapse.<br />- Bladder ultrasound was found to be accurate in women with a BMI of 35 kg/m2 or higher.<br />- However, PVR volumes exceeding 200 mL, regardless of BMI, may be more accurately assessed using urethral catheterization.<br /><br />These findings suggest that portable bladder ultrasound can be a reliable method for assessing PVR in obese women, particularly in the outpatient setting. It is especially accurate for those with a BMI of 35 kg/m2 or higher. However, for larger PVR volumes, the gold standard method of urethral catheterization may be more accurate.<br /><br />In summary, the study concludes that portable bladder ultrasound is a valid and accurate method for assessing PVR in obese women, except for higher PVR volumes which may require alternative methods such as urethral catheterization.

Keywords

portable bladder ultrasound

postvoid residual

PVR assessment

obese women

non-obese women

BMI

accuracy

outpatient setting

Pelvic Organ Prolapse Quantification

POP-Q system