Clinical Case Scenario
A 45-year-old man with abdominal sepsis caused by duodenal perforation was transferred to the ICU from the operating theatre in view of septic shock (on norepinephrine 0.2 microgram/kg/minute) and acute kidney injury. He requires emergent dialysis in the ICU. A 12 French triple-lumen dialysis catheter is uneventfully placed via the right internal jugular vein by a senior registrar in the ICU. Post-insertion, a chest X-ray (CXR) shows the catheter tip in the mid-right atrium (RA).
What is the most urgent next step for this patient?