Halawi MJ, et al. - Researchers ascertained the incidence and risk factors for postoperative urinary retention (POUR) in fast-track total joint arthroplasty (TJA) emphasizing rapid mobilization, multimodal analgesia, and shorter hospital stay. For POUR, the most significant risk factors in modern-day fast-track TJA are iatrogenic. They discouraged, especially in patients older than 60 years, the routine intraoperative placement of an indwelling bladder catheter and fluid administration exceeding 1350 ml.