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Pelviureteric junction obstruction and pyeloplasty

Pelvic ureteric junction obstruction and Pyeloplasty

Pelvic ureteric junction obstruction (PUJO) is a blockage where the kidney pelvis join the ureter. This is an internal narrowing or a blood vessel causing external compression. When untreated, this causes worsening kidney function, swelling of the kidney (hydronephrosis) and predisposes to injury and pain.


PUJO is treated with the Anderson Hynes pyeloplasty under general anaesthesia. The
blockage is removed and the unobstructed ureter is joined to the kidney. An internal stent is left within the new joint to ensure patency. An external drain may be left temporarily for 1 to 2 days. 

Follow up care:

Your child can have baths after the surgery. Drink adequate amounts of water and the nurses will need to record your child’s urine output. The stent will be removed at a later date. A follow up ultrasound will be done to assess resolution of the obstruction.

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If you have other enquiries on children’s surgical conditions, feel free to contact us

Dr Wong Zeng Hao
Dr Wong Zeng Hao

Paediatric Surgery & Urology International

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