Short Communication

Spinal Cord (2005) 43, 187–189. doi:10.1038/sj.sc.3101700 Published online 30 November 2004

Effect of a phosphate supplement on urine pH in patients with neurogenic bladder receiving intermittent catheterization

T A Schlager1, K Ashe1 and J O Hendley1

1Departments of Pediatrics and Emergency Medicine, University of Virginia, Charlottesville, VA, USA

Correspondence: TA Schlager, University of Virginia, PO Box 800699, Charlottesville, VA 22908-0699, USA

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Abstract

Study design:

 

Pilot study; prospective design.

Setting:

 

University Hospital, Virginia, USA.

Objective:

 

To examine a phosphorus supplement as a urine-acidifying agent in patients with neurogenic bladder on clean intermittent catheterization.

Methods:

 

Seven patients were followed for 4 weeks. For the first week of study urine pH was measured three times a day: first morning urine sample, afternoon sample, evening sample. For the second and third weeks urine pH was measured and the patients drank a phosphorus supplement three times a day. For the fourth week of study the patients did not take the phosphorus supplement but the measurement of urine pH was continued. The patients were visited in their homes twice a week. During each visit a sample of urine was collected for culture. A supplement container count was performed and urine pH recordings were checked.

Results:

 

There was no significant change in urine pH during the 2-week period when a patient was on phosphorus supplementation compared to when the patient was off supplementation. In addition, urine acidification was not achieved over the time period when urine pH was monitored.

Conclusion:

 

Phosphate supplementation had no effect on urine pH in patients with neurogenic bladder.

Keywords:

neurogenic bladder, urine pH, phosphate, bacteriuria

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