This section describes efficacy outcomes from the published literature that the Committee considered as part of the evidence about this procedure. For more detailed information on the evidence, see the overview.
4.1 A case series of 22 patients reported that deployment of an endoscopic radiofrequency ablation catheter was successful in 95% (21/22) of patients. The 1 unsuccessful deployment occurred because of irretrievable proximal migration of a previously placed plastic stent.
4.2 The case series of 22 patients reported that self-expandable metal stent placement was achieved after endoscopic radiofrequency ablation in 100% (21/21) of successful catheter deployments.
4.3 The case series of 22 patients reported that stent patency was maintained in 95% (20/21) of patients at 30-day follow-up (1 patient developed further biliary obstruction), and 76% (16/21) of patients at 90-day follow-up (2 had died, and 3 developed further biliary obstruction).
4.4 The specialist advisers listed key efficacy outcomes as survival, stent patency, reduced occurrence of cholangitis, reduced need for further biliary intervention and quality of life.