Abstract:

BACKGROUND: The repair and reconstruction of urinary system are performed with various biological materials, which has been the focus of the reconstruction of medical research.
OBJECTIVE: To evaluate the clinical effect, complication and application of urethral stent made from different materials in the treatment of urinary system disease and the effect of different implantation on avoidance of complications.
METHODS: Researches were related to urethral stent implantation from Wanfang database (1990-01/2010-12) by computer with the key words of “urethral stent material, biocompatibility”. Repetitive, common summarization or Meta-analysis were excluded, 19 literatures were screened for evaluation.
RESULTS AND CONCLUSION: At present, urethral stent made from different materials including Ni-Ti memory alloy mesh stent, Ni-Ti memory alloy helical stent, titanium wire helical stent and silica gel stent. Although Ni-Ti memory alloy helical stent had good flexibility and compatibility, and its dissepiments had favorable permeability and indeed reliable drainage, stent prone to lodging or overlay, and should not be long placed. Ni-Ti memory alloy mesh stent was significantly better than helical stent. Ni-Ti memory alloy mesh stent had large enough diameter and bearing and had a recent significant curative effect. The clinical effect of titanium wire helical stent in treatment of lower urinary tract obstruction in elderly. This may be associated with special fovea centralis of stent and difficult to shift and slip in urethra. Silica gel supporter with multi-side holes is conductive to the success of urethroplasty, reduce trauma, and does not affect the results of operations. Urethral stent for the production has a lot of choices; the method of implantation is different. In practical operation, we should according to the actual situation of patients and take corresponding measures to achieve the most satisfactory results.