False‐positive pregnancy tests in patients with enterocystoplasties

Abstract

In the pilot study, three men and two women had positive pregnancy test results. In the main study, 14 patients had a positive Clearview test (nine women and five men). One women was found to be pregnant and was therefore excluded from further analysis, giving a false-positive rate of 57%. There was no difference in the type of reservoir, urine biochemistry and urine analysis results between the positive and negative groups. Frozen/thawed samples all tested negatively. Conclusion It is possible that the mucus produced in enterocystoplasties may be interfering with the pregnancy test. Patients should be aware of this and not rely on commercial test kits. There is some potential that this test system could be adapted for measuring mucus production in urinary diversions.