Urinary catheters can lead to complicated UTIs. CAUTIs occur in 3-10% of ICU patients per day and almost all by 30 days. Common organisms include Pseudomonas, Enterococcus, and E. coli. Risk factors include improper handwashing and maintenance. Symptoms with positive urine culture indicate CAUTI. Treatment involves removing the catheter, obtaining a urine sample, and starting antibiotics. Proper hand hygiene and following maintenance procedures can prevent CAUTIs. Antibiotics before procedures like cystoscopy may reduce UTIs but have a high number needed to treat. Vesicostomy and nephrostomy can also lead to UTIs, which are usually treated with oral antibiotics.