text: Yo, check it out, here's the deal,
  Bileduct catheterisation, it's for real.
  Percutaneously through the liver, that's how we go,
  Helpin' patients with obstructive jaundice, yo.
  
  It's an adjunct or an alternative to surgery,
  Preoperative drainage, it's the key.
  Treatin' severe cholangitis, no doubt,
  Reducin' jaundice, we gotta shout it out.
  
  Palliative drainage, internal or external,
  Instead of surgery, that's the protocol.
  In 40 outta 41 patients, it succeeded,
  With complications treated, no need to be defeated.
  
  Bile drainage established, let me explain,
  Endoprosthesis into duodenum, no pain.
  In 7 patients, that's the way to go,
  Externally through a catheter, for the rest, yo.
  
  This technique's the bomb, let me show,
  Suppurative cholangitis, benign or malignant, we know.
  It's illustrated, the use is clear,
  Drainage through the liver, we're breakin' barriers here.