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Question: Urology

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You are seeing a 5 year old boy with abdominal pain. His parents say that he has not been eating solids, but has been taking in liquids all day, yet he has not urinated.

What is an abnormal post-void residual in a child?

pemsou5_wp • February 15, 2022

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  1. Kelly February 15, 2022 - 10:51 pm Reply

    B) > 20 mL
    More than 20mL post-void residual (PVR) is abnormal in children. Most adults empty their bladder to 200 mL PVR in an adult is clearly abnormal. Catheterization after a void is the gold standard for measuring PVR. However, Ultrasound calculation of bladder volume after a void is often used to estimate PVR. The differential for abnormal PVR is broad, including neurogenic causes, anatomic blockages, medication related, and urine withholding secondary to pain.

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