Here is the link to RCT of 120 patients randomized to receive conservative management or endocscopic procedures within the first 72 hours of presentation.
Oría A, et al. Early endoscopic intervention versus early conservative management in patients with acute gallstone pancreatitis and biliopancreatic obstruction: a randomized clinical trial. Ann Surg. 2007 Jan;245(1):10-7.
PubMed Central fulltext
ATTN: Here is the systematic review I identified when I recently reran the search in PubMed clinical queries and changed the term “gall bladder” to “gallstones” in the search box (gallstones AND surgery AND mortality)
Ayub K, Imada R, Slavin J. Endoscopic retrograde cholangiopancreatography in gallstone-associated acute pancreatitis. Cochrane Database Syst Rev. 2004 Oct 18;(4):CD003630.
Search terms are important!