Torres-Salazar JJ, Flores-Terrazas JE, Niño-Nájera W

Language: Spanish
References: 4
Page: 273-276
PDF size: 241.99 Kb.

ABSTRACT

Introduction: In obstructive uropathy of neoplastic origin mainly of the inferior third of the ureter, standard procedure is ureteral catheter placement. If it collapses, the next step has been to place a nephrostomy tube. In an attempt to reduce morbidity and improve patient quality of life, new ureteral stent materials and designs have been explored.
Materials and methods: All patients diagnosed with obstructive unilateral or bilateral uropathy of neoplastic origin regardless of survival prognosis were included in the study. Eleven metallic ureteral stents were placed in a total of 5 patients.
Results: Up to the present date 5 patients have been treated for obstructive uropathy secondary to neoplasia and 11 metallic ureteral stents have been placed. Follow-up has been carried out with kidney ultrasound and serum creatinine, with improvement observed in both parameters in all cases.
Discussion: Patient series treated with metallic ureteral stents are small and urinary flow characteristics with the stent in position have not yet been fully studied. An advantage of these stents in relation to traditional catheters is that they are more resistant to extrinsic compression. However, recent studies have shown that when tumor volume is very large, flow is not significantly improved.
Experience with metallic ureteral stent use is limited. Further studies showing long-term economic impact will certainly increase their use. In addition, more related physiological studies need to be carried out to determine the real advantage over traditional treatment.

REFERENCES

1. Lopez-Martinez RA, Singireddy S, Lang EK. The use of metallic stents to bypass ureteral strictures secondary to metastatic prostate cancer: experience with 8 patients. J Urol 1997;158(1):50-3.

2. Kulkarni R, Bellamy E. Nickel-titanium shape memory alloy Memokath 051 ureteral stent for managing long-term ureteral obstruction: 4-year experience. J Urol 2001;166(5):1750-4.

3. Barbalias GA, Liatsikos EN, et al. Ureteropelvic junction obstruction: an innovative approach combining metallic stenting and virtual endoscopy. J Urol 2002;168(6):2383-6.

4. Barbalias GA, Siablis D, Liatsikos EN. Metal stents: a new treatment of malignant ureteral obstruction. J Urol 1997;158(1):54-8.