Comparison of Efficacy and Safety Between a Segmental Thermo-expandable Metal Alloy Spiral Stent (Memokath 051) and a Self-Expandable Covered Metallic Stent (UVENTA) in the Management of Ureteral Obstructions

Abstract

The UVENTA achieved a higher clinical success rate than the Memokath 051. Our study demonstrated that the UVENTA is safe and effective in the management of benign and malignant ureteral obstruction. The complications were similar between the two metallic stents.

The effectiveness of ureteric metal stents in malignant ureteric obstructions: A systematic review

“…The studies were published over a period of 23 years (1992–2016) and included 21 prospective and 10 retrospective studies. These studies reported the effectiveness of specific MSs in population studies [1] , [2] , [3] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , in comparative studies between different MSs [28] and between MSs and JJ stents [29] , [30] . It should be noted that all comparative studies were retrospective in nature.…”

“…The Memokath 051 was reported to have patency rates ranging between 82% and 100%. The most common complication was stent migration, with an incidence ranging between 10.8% and 17.4% of the stented ureters [2] , [5] , [14] , [22] , [26] , [28] , [30] . The Memokath 051 is a stent that has been used and studied for many years, especially from 1999 to 2014 ( Table 2 , Table 3 ).…”

“…The combination of plasticity and difference sizes allow for the better adaptation to the stricture to be treated. Studies with the stent showed promising results in terms of patency and migration [1] , [10] , [13] , [28] , [29] . Low rates of complications such as haematuria, infections, LUTS, encrustation, and pain were reported.…”

“…They also described high rates of major complications such as uretero–arterial fistulae (6%), uretero–enteric fistulae (6%), uretero–vaginal fistulae (2%), uncontrollable bleeding (2%), and stone encrustation (4%). The Uventa has been evaluated in comparison to the Memokath 051 and conventional JJ stents [28] , [29] . The comparison with the Memokath 051 showed higher patency rates for the Uventa, with clinical success in 14/17 (82.4%) of the cases (42.9% for the Memokath 051) [28] .…”

Early Application of Permanent Metallic Mesh Stent in Substitution for Temporary Polymeric Ureteral Stent Reduces Unnecessary Ureteral Procedures in Patients With Malignant Ureteral Obstruction

“…25 Although more studies are required, several recent articles about UVENTA stent efficacy The efficacy of UVENTA ureteral stenting has been compared with those of PDJ and Memokath 051. 26,27 Most metal stent placements are performed to achieve long-lasting patency and to decrease complications in patients with extrinsic MUO. However, several patients have undergone additional procedures after the placement of ureteral metal stents due to decreased function.…”