Procedure time ( 1,620 [ 1,230-2 ,100 ] vs. 1,500 [ 1,080-2 ,100 ] sec , p = ns ) and fluoroscopy time ( 540 [ 411-735 ] vs. 501 [ 378-702 ] sec , p = ns ) were not significantly different , but the radiation dose was significantly higher in the TR group ( 195 [ 129-274 ] vs. 148 [ 102-237 ] Gy * cm2 , p < 0.05 ) by per-protocol analysis .