Effect of Urethral Balloon Dilatation on Urinary Retention After Spinal Cord Injury

Inclusion Criteria: 1. Age between 18-80 years old 2. There is a confirmed diagnosis report of CT or MRI imaging, with the first diagnosis being spinal cord injury (complete or incomplete), which conforms to the International Classification of Spinal Cord Injury Neurology published by the American Spinal Injury Association (ASIA) in 2013 3. The spinal shock period has passed, and consciousness is clear with stable vital signs 4. In line with the diagnostic criteria of urinary retention and in combination with clinical practice: the patient can urinate autonomously before spinal cord injury, which is confirmed as spinal cord injury by clinical examination. It is manifested as retention of urine after spinal cord injury, swelling of lower abdomen, filling of bladder, dullness on percussion, residual urine volume of bladder B ultrasonic examination is more than 300ml, which shows that urination is laborious 5. Urodynamic examination shows maximum urethral pressure greater than 50cmH2O 6. No tumors or benign prostatic hyperplasia were found 7. Patients who have had their indwelling urinary catheter removed 8. Voluntary participation in research and signing of informed consent form Exclusion Criteria: 1. Patients with severe heart, brain, lung and other important organ diseases or mental and cognitive disorders 2. Individuals with disrupted water electrolyte and acid-base balance 3. There are serious kidney diseases, bladder fistula surgery, anterior urethral sphincterotomy and other diseases 4. There is a urinary system infection