Central Auckland > Public Hospital Services > Auckland District Health Board (ADHB) >

Auckland DHB Renal Medicine

Public Service, Nephrology

Kidney Stones

The lifetime incidence of kidney stones in Western Nations is 13% for men and 7% for women. The average age for first presentation is 40-50 but kidney stones can occur in virtually any age group. People at greater risk include those from the Middle East, those with obesity and/or “metabolic syndrome”. Up to 40% of kidney stone formers have a family history and this is higher in children. Many people pass only one kidney stone in their lives but around 50% are recurrent stone-formers.

When a patient presents with acute renal colic they should be referred to Urology usually via the Emergency Department (refer Urology Guidelines in Healthpoint)

Those with a high risk for recurrent kidney stones should be referred electively to the Renal Service for Metabolic Risk assessment and management (refer to algorithm below). In all cases this will include Renal Physician and Dietitian assessment with recommendations based on the results of investigations. Some patients will also be managed with pharmaceuticals depending on the risks identified. In virtually all cases patients should be encouraged to drink enough water or other beverages (such as tea, coffee or orange juice) in order to pass 2.5 litres of urine per day so as to dilute promoters of stone formation.

It is essential if possible to undertake a stone analysis. Ask the patient to bring any stone passed and send to the laboratory for stone analysis.

Further details can be found on the Auckland Health Pathways site.

This page was last updated at 12:36PM on August 2, 2021.