Compare the Knob-tipped Knife With the Needle Knife in Difficult Biliary Cannulation
NCT01745978
·
clinicaltrials.gov ↗
PHASE3
Phase
UNKNOWN
Status
50
Enrollment
OTHER
Sponsor class
Conditions
Endoscopic Retrograde Cholangiopancreatography
Bile Duct Diseases
Interventions
PROCEDURE:
Precut papillotomy
Sponsor
Changhai Hospital