For effective cholangiography, where should india ink be injected?

For effective cholangiography, India ink should be injected submucosa at the level of the lesion. This technique allows the ink to visualize the anatomy in the bile ducts and help delineate any abnormalities or lesions. By injecting it at the submucosal level, the India ink can more effectively illustrate the surrounding structures, enhancing the clarity of the images obtained during cholangiography. This precise localization is crucial for assessing the condition of the bile ducts, especially in cases where lesions may be present, ensuring optimal imaging results.

Choosing to inject the ink proximal to the lesion or into the main arterial supply does not provide the necessary detailed visualization of the bile ducts. Injecting intraabdominally lacks specificity and would not have the same effect as targeted submucosal injection, making it less suitable for the task of cholangiography.