Early or Late Foley Removal After Thoracotomy

Inclusion Criteria: * epidural catheter after thoracic surgery * foley in place Exclusion Criteria: * \< 18 years of age * death in hospital within 30 days of the operation * length of hospital stay is less than 48 hours * epidural catheter is removed before the 3rd postoperative day * patients who have a suprapubic catheter or no bladder * patients who require a urologist or a urologic technician to insert the Foley catheter at the time of surgery * patients who were being intermittently catheterized before surgery * patients with a known urinary tract infection preoperatively * patients required to keep Foley in since they required close monitoring of urinary output