Christchurch Radiology, Canterbury, New Zealand. Xray - CT - Ultrasound - MRI - Bone Density

Protocol for the Investigation of UTI in Children

FOLLOW-UP OF ANTENATAL
FETAL RENAL DILATATION

Recent research work at Christchurch Hospital has shown that post-natal follow-up has a low yield when dilatation of less than 10mm is demonstrated on scanning at 32 - 34 weeks.

Following multi-disciplinary discussions it has been agreed that follow-up should only be performed when dilatation of 10mm or more is present. Previous to this work the cut-off was 6mm. This will result in a considerable reduction in the number of infants requiring investigation.

Occasionally follow-up will be required when there are other findings (visible fluctuation, ureteric or calyceal dilatation) with lesser degrees of dilatation.

Guidelines for the Investigation of Ante-natal Fetal Renal Dilation

Renal dilatation (>= 5mm) at 18 - 20 wks

Repeat US at 32 - 34 weeks

Renal dilatation (>= 10 mm) at 32 - 34 wks

US at 5 - 7 days, Paediatric review,
MCU and US at 6 - 8 weeks

Other Indications for Urinary Tract Imaging in Infants / Children

Family history of VUR in parent / sibling

MCU and US at 6 - 8 weeks

Ante-natal multi-cystic dysplastic kidney

MCU and US at 6 - 8 weeks

Documented UTI < 1 year of age

MCU and US and DSMA

Documented UTI 1 - 5 years of age

US (and DMSA if febrile UTI ie pyelonephritis)

Documented UTI > 5 years of age

US only

Children over the age of 1 year should only have an MCU following consultation with a paediatrician or paediatric surgeon.




Dr Andrew Long
Radiologist
CHRISTCHURCH RADIOLOGY GROUP