Overview
Recognize the Sacral Emergency
A patient with acute low back or radicular pain who develops a new change in bladder sensation, urinary initiation, bowel control, sexual function, or saddle sensation may have...
A patient with acute low-back or radicular pain who develops a new change in bladder sensation, urinary initiation, bowel control, sexual function, or saddle sensation may have cauda equina syndrome (CES). The pattern matters more than any single symptom: sacral dysfunction plus bilateral or progressive leg findings should move the patient out of a routine back-pain pathway and into emergency assessment. The first nursing response is focused neurologic and sacral assessment, immediate escalation, and preparation for urgent lumbar MRI. Ask directly about the ability to feel bladder filling, start the stream, and finish voiding; ask about bowel and sexual changes without assuming the patient will volunteer them. Measure a post-void residual when appropriate, but do not use a value below approximately 200 mL or the absence of complete retention to dismiss early or incomplete CES. A normal initial examination can also change as compression progresses. MRI identifies whether multiple nerve roots are compressed and helps distinguish disc herniation from tumor, infection, hematoma, or another structural cause. If a surgically treatable lesion is confirmed, urgent spine-surgeon or neurosurgical coordination and decompression...