A 62-year-old man is seen in the clinic for a single episode of painless gross hematuria 1 week ago. He has smoked one pack of cigarettes per day for 40 years and currently smokes. He has no fever, dysuria, flank pain or recent trauma, takes no anticoagulants or antiplatelet agents, and has no known drug allergies. On examination, the abdomen is soft and non-tender, and digital rectal examination reveals a smooth, mildly enlarged prostate. Urinalysis shows 3+ blood, and microscopy shows 40 red blood cells per high-power field without casts or dysmorphic cells. Urine culture is negative. Hemoglobin is 138 g/L (130-170), creatinine is 88 µmol/L (60-110) and INR is 1.0 (0.9-1.2). Renal ultrasound shows no mass, stones or hydronephrosis, and urine cytology is negative for malignant cells.
| Heart rate | 76/min |
| Respiratory rate | 14/min |
| Temperature | 36.8 °C |
| O2 saturation | 98%, room air |
| Blood pressure | 138/82 mm Hg |
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Which one of the following is the most appropriate next step in management?
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