Inclusion Criteria:  Acute onset suprasacral spinal cord injury with both traumatic and non-traumatic causes within the first 15 days after spinal cord injury(very acute phase of SCI according to European Multicenter Study about SCI : the first 15 d (very acute), between 16-40 d (acute I), and 3 mo (acute II), 6 mo (acute III), and 12 mo (chronic) after SCI) Age older than 18 Inpatient Patients with spinal cord injuries who initially keep the indwelling catheter Patients with or without spinal shock  Exclusion Criteria:  nstable vital sign (using Inotropics or vasopressors or antiarrhythmic agents)  Current urinary tract infection Agitated behavior (Richmond Agitation and Sedation Scale of +2 to +4) Decreased mentality (RASS of -2 to -5) Concomitant sacral lesions (Ex. Sacral fracture, pelvic bone fracture, urologic trauma) Concomitant supraspinal lesions (Ex. Traumatic brain injury, old stroke, Parkinson disease) Uncontrolled DM Medical history of lower urinary tract dysfunction (Ex. BPH, Malignancy) Uncontrlled autonomic dysreflexia (In case of autonomic dysreflexia, defined according to ISAFSCI (International Standards to document remaining Autonomic Function after SCI) as an increase in systolic blood pressure 20 mm Hg or greater from baseline