Catheter-related infections may be minimised by appropriate choice of catheter and insertion technique. Insulin pumps may be like 'electrical injectors' attached to a temporarily implanted catheter or cannula. Tracheal intubation refers to the insertion of a catheter down the trachea. It may also be used for the insertion of a peripherally inserted central catheter. Atrial flutter can be treated more definitively with a technique known as catheter ablation. Amiodarone IV should be administered via a central venous catheter. The indwelling Foley catheter drains urine from the bladder. Minimizing movement helps prevent bleeding from the site of catheter insertion. Urethral trauma is the only absolute contraindication to placement of a urinary catheter. The process of inserting a catheter is "catheterization". Vagal maneuvers or a procedure known as catheter ablation may be effective in certain types. Minimizing movement helps prevent bleeding from the site of the catheter insertion. These arterial monitors do not require intracardiac catheterisation from a pulmonary artery catheter. For acute urinary retention, treatment requires urgent placement of a urinary catheter. The needle is then withdrawn over the catheter.