Vein Mapping Test Show Blood Clots?

Does anyone know if a vein mapping test would show any blood clots? I've had a DVT about 2 years ago, and just recently had a vein mapping test done (to have my varicose veins removed). I'm still waiting for the official results, but the tech said I have Reflux in the veins, but didn't say anything about clots. I've been getting a lot of pain in the leg and was wondering if any knew if the vein mapping test would have shown if there were any clots present? Thanks.