Objectives: To determine the value of mid-infrared spectroscopy (MIRS) of ureteral stent encrustations in predicting urinary stone composition.
Methods: A retrospective study analyzed the composition of stent encrustations and urinary stones by MIRS in patients who had had a stent for ureteral obstruction between 2001 and 2003. The overall correlation was evaluated. The correlation coefficient kappa for agreement between the proportions of each component was calculated.
Results: A total of 72 stents and 72 stones from 72 patients were analyzed. The mean stent indwelling time was 55.5 days (range 14 to 102). The stents had been placed for fever (52 cases, 72%), pain refractory to analgesics (15 cases, 21%), and impairment of kidney function (5 cases, 7%). The overall correlation between stone composition and stent encrustation was 71.4%, excluding biofilm analysis. The kappa value was 0.78 for the main component (n = 72; P < 0.0005), 0.61 for the secondary component (n = 72; P < 0.0005), and 0.91 for the agreement between the composition of encrustations at each end of a stent (n = 30; P < 0.0005).
Conclusions: MIRS analysis of stent encrustations is a reliable method of predicting stone composition when the stone cannot be retrieved. Systematic MIRS analysis of stent encrustations is not recommended but can be very useful in clinical situations in which no stone is available.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.urology.2005.03.054 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Initial experience of a novel ureteral silicon-covered metallic mesh stent in malignant ureteric obstruction: a single-center retrospective study.
BMC Urol
December 2024
Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Korea.
Background: This study aimed to investigate initial experiences and outcomes of a retrograde inserted new silicone-covered metallic ureteric stent (Urexel™) for malignant ureteric obstruction.
Methods: We retrospectively reviewed the medical records for 12 consecutive patients who underwent Urexel™ stent placement for malignant ureteric obstruction from March 2020 to March 2021. The Urexel™ stent is a segmental metallic ureteric stent composed of a nitinol mesh covered with a silicone membrane.
Should patients with encrusted JJ stents involving the proximal/renal loop undergo primarily endoscopic combined intrarenal surgery?
Arch Ital Urol Androl
November 2024
Urology Department, Centro Hospitalar e Universitário de Santo António, Unidade Local de Saúde de Santo António, Porto.
Background: Ureteral stents are one of the most used devices in Urology, allowing drainage of the upper urinary system, and can be used either in elective or emergency procedures. However, as a foreign body inside the urinary system, they are subject to encrustation. Encrustation is one of the burdens seen with double-J stents and, to date, there is no consensus about its best management.
View Article and Find Full Text PDFFlexible Ureteroscopy Combined with Novel Ultra-Flexible Ureteral Access Sheaths for Treating Allium Stent Encrustation: Initial Experience with 15 Cases.
J Endourol
December 2024
Department of Urology, Jiangxi Provincial Key Laboratory of Urinary System Diseases, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China.
Encrustation significantly affects the lifespan of Allium stents. Currently, there is no established treatment for Allium ureteral stent encrustation. This study introduces a method for treating these encrustations using a flexible ureteroscopy (F-URS) combined with a novel ultra-flexible ureteral access sheath (UF-UAS).
View Article and Find Full Text PDFAllium covered metal stent for treatment of malignant ureteral obstruction.
Front Surg
November 2024
Department of Urology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China.
Background: Malignant ureteral obstruction (MUO) has the potential to result in a range of outcomes, including varying degrees of hydronephrosis and renal impairment. Allium covered metal stents have provided a new, highly effective treatment option for MUO. Our objective was to evaluate the safety and efficacy of the Allium covered metallic stent for the treatment of malignant ureteral obstruction.
View Article and Find Full Text PDFA large vaginal stone on top of ureteric stent migration through a poucho-vaginal fistula after radical cystectomy and ileal neobladder reconstruction - A case report.
Int J Surg Case Rep
December 2024
Radiology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt.
Introduction And Importance: Orthotopic neobladder reconstruction may be associated with complications such as neobladder-vaginal fistula (NVF) and uretero-ileal anastomotic stricture which are often managed using stents, though these can be prone to migration.
Case Presentation: We present a 69-year-old lady with a surgical history of radical cystectomy and ileal neobladder that was complicated by a left ureteric stricture and poucho-vaginal fistula for which she underwent a left ureteric stent and bilateral percutaneous nephrostomy (PCN) insertions after which she lost to follow-up. The patient later presented to our center with a right subcostal anterior abdominal wall desmoid tumor for which she underwent wide local excision.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!