Like the endoscopic retrograde cholangiopancreatography, SpyGlass is inserted through the patient's throat, through the stomach, into the bile duct and gives a visual image thanks to the deviated design in 4 different directions, the doctor can observe. images at all 4 quadrants of the entire treatment area.

Studies evaluating the effectiveness of the Spyglass cholangioscopy system have reported that visualization directly improves the accuracy of cholangioscopy results and has a positive good predictive value in the evaluation of patients with symptoms of biliary obstruction of unspecified origin.