Metallic ureteric stent
Metallic ureteric stents are a group of ureteric stents developed to offer improved symptomatic relief of obstruction when compared to polymeric (polyurethane) stents. They are often used in patients with lchronic malignant ureteric obstructions who require placement of long-term ureteral stents to relieve the urinary obstruction and as a palliative measure to reduce pain and avoid major operation.
They aim to be better than polymeric (polyurethane) stents by:
- better maintaining ureteral patency in malignancy when conventional polyurethane stents are usually occluded
- having increased time intervals between stent changes
- being less prone to infection and bleeding
- causing less irritation of the lower urinary tract
An example of a metallic ureteric stent is the Memokath stent, which has an expanded top to anchor it within the ureter.