Patients with malignant ureteric obstruction and poor life expectancy usually require placement of ureteral stents to relieve the urinary obstruction and as a palliative measure to reduce pain and avoid major operation.
Metallic ureteric stents have recently been developed to try and offer better relief of obstruction than polymeric (polyurethane) stents due to:
- better maintaining ureteral patency in malignancy when conventional polyurethane stents are usually occluded.
- increased intervals between changes.
- less liable to infection, sepsis and bleeding as in nephrostomy tubes.
- less irritation of the lower urinary tract then JJ catheter.
Example of the metallic stent: Memokath stent which has expanded top to anchor it within the ureter.
- 1. Allen DJ, Longhorn SE, Philp T et-al. Percutaneous urinary drainage and ureteric stenting in malignant disease. Clin Oncol (R Coll Radiol). 2010;22 (9): 733-9. doi:10.1016/j.clon.2010.07.004 - Pubmed citation
- 2. Yachia D. Metal ureteral stents in chronic obstructions. Indian J Urol. 2011;27 (3): 307-9. Indian J Urol (full text) - doi:10.4103/0970-1591.85421 - Free text at pubmed - Pubmed citation