 2. The post-void residual free voiding trial intervention: Backfill the bladder with up to 300 ml as tolerated of normal saline or sterile water through an indwelling Foley catheter. The catheter is removed and the patient is given 15 minutes to void and the voided volume is measured. The participant is considered to have passed the void trial if they void more than 12 the instilled volume. A PVR will not be performed. 