title: A prospective randomized trial of 1 versus 2 injections during EUS-guided celiac plexus block for chronic pancreatitis pain.
abstract: BACKGROUND
  The efficacy of 1-injection versus a 2-injections method of EUS-guided celiac plexus block (EUS-CPB) in patients with chronic pancreatitis is not known.
  
  
  OBJECTIVE
  To compare the clinical effectiveness and safety of EUS-CPB by using 1 versus 2 injections in patients with chronic pancreatitis and pain. The secondary aim is to identify factors that predict responsiveness.
  
  
  METHODS
  A prospective randomized study.
  
  
  METHODS
  EUS-CPB was performed by using bupivacaine and triamcinolone injected into 1 or 2 sites at the level of the celiac trunk during a single EUS-CPB procedure.
  
  
  METHODS
  Duration of pain relief, onset of pain relief, and complications.
  
  
  RESULTS
  Fifty [corrected] subjects were enrolled (23 received 1 injection, 27 [corrected] received 2 injections). The median duration of pain relief in the 31 responders was 28 days (range 1-673 days). [corrected] Fifteen [corrected] of 23 (65%) [corrected] subjects who received 1 injection [corrected] had relief from pain compared with 16 of 27 (59%) [corrected] subjects who received 2 injections [corrected] (P = .67). [corrected] The median times to onset in the 1-injection and 2-injections groups were 21 and 14 days, respectively (P = .99). No correlation existed between duration of pain relief and time to onset of pain relief or onset within 24 hours. Age, sex, race, prior EUS-CPB, and smoking or alcohol history did not predict duration of pain relief.
  
  
  CONCLUSIONS
  Telephone interviewers were not blinded.
  
  
  CONCLUSIONS
  There was no difference in duration of pain relief or onset of pain relief in subjects with chronic pancreatitis and pain when the same total amount of medication was delivered in 1 or 2 injections during a single EUS-CPB procedure. Both methods were safe.
authors.affiliation: Division of Gastroenterology and Hepatology, Indiana University Medical Center, Indianapolis, Indiana 46202, USA. juleblan@iupui.edu
authors.forename: Julia K
authors.initials: JK
authors.lastname: LeBlanc
authors.forename: Jon
authors.initials: J
authors.lastname: DeWitt
authors.forename: Cynthia
authors.initials: C
authors.lastname: Johnson
authors.forename: Wycliffe
authors.initials: W
authors.lastname: Okumu
authors.forename: Kathleen
authors.initials: K
authors.lastname: McGreevy
authors.forename: Michelle
authors.initials: M
authors.lastname: Symms
authors.forename: Lee
authors.initials: L
authors.lastname: McHenry
authors.forename: Stuart
authors.initials: S
authors.lastname: Sherman
authors.forename: Thomas
authors.initials: T
authors.lastname: Imperiale
mesh_terms: D000328:Adult; D000368:Aged; D000779:Anesthetics, Local / Q000008:administration & dosage*; D002045:Bupivacaine / Q000008:administration & dosage*; D002447:Celiac Plexus / Q000000981:diagnostic imaging*; D002908:Chronic Disease; D019160:Endosonography; D005260:Female; D006801:Humans; D007267:Injections / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D009407:Nerve Block / Q000379:methods*; D010146:Pain / Q000209:etiology*; D059408:Pain Management; D010195:Pancreatitis / Q000150:complications*; D011446:Prospective Studies; D055815:Young Adult
chemical_list: D000779:Anesthetics, Local; D002045:Bupivacaine