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Does the use of ureteral stents with extraction strings increase urinary infection rates?

  • Urology - Original Paper
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Abstract

Purpose

To assess the effect of ureteral stents with extraction string on the rate of postoperative UTI after ureteroscopies.

Methods

Retrospective analysis of patient records who underwent ureteroscopy from January 2011 to August 2014 was performed. Patients were grouped into three groups according to postoperative stent status: non-stented or ureteral catheter for up to 24 h (NS), ureteral stent without extraction string (US) and ureteral stent with an extraction string (US-E).

Results

There were 144, 133 and 282 cases in the NS, US and US-E groups, respectively. Overall infection rate was 4.7%; NS—2.1%, US—3.0% and US-E—6.7% (p = 0.057). Four percentage of men and 6.6% of women had postoperative UTI (p = 0.22). Within the group of men infection rates were 0, 2.4 and 6.4% for the NS, US and US-E groups, respectively (p = 0.01). For women, UTI rates were 7.5, 4.0 and 8.5% in the NS, US and US-E groups, respectively (p = 0.6). Infection rates were 20 and 3.9% (p = 0.001) for patients with extraction strings for >8 and <8 days. In multivariate analysis the presence of an extraction string was found to be a risk factor for infection OR 7.7 (1.01–58.9, 95% CI, p = 0.049) along with renal stone location OR 5.09 (2.1–12.05, 95% CI, p < 0.001).

Conclusions

No statistically significant difference was found between overall infections rates for patients with and without extraction strings, and such difference was found within the male group, suggesting extraction strings in men may increase the risk of infection.

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Authors and Affiliations

  1. Department of Urology, Lady Davis Carmel Medical Center, Haifa, Israel

    Yuval Freifeld, Demitry Goldin, Boris Friedman, Leonid Boyarsky, Ilan Klein, Faris Gazy, Avi Stein & Yoram Dekel

  2. The Ruth and Bruce Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel

    Luai Khalili

Authors
  1. Yuval Freifeld
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  2. Demitry Goldin
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  3. Luai Khalili
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  4. Boris Friedman
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  5. Leonid Boyarsky
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  6. Ilan Klein
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  7. Faris Gazy
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  8. Avi Stein
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  9. Yoram Dekel
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Correspondence to Yuval Freifeld.

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The authors declare that they have no conflict of interests.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required.

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Freifeld, Y., Goldin, D., Khalili, L. et al. Does the use of ureteral stents with extraction strings increase urinary infection rates?. Int Urol Nephrol 49, 763–767 (2017). https://doi.org/10.1007/s11255-017-1533-y

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  • DOI: https://doi.org/10.1007/s11255-017-1533-y

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