How much urine should not be released for the first time in patients with urinary retention

The urine volume discharged by the first catheterization of urinary retention patients should not exceed 1000ml. The urine volume discharged by the first catheterization of urinary retention patients should not

exceed 1000ml. The excessive volume of urine stored in the bladder of urinary retention patients may cause excessive filling to the maximum capacity. The first catheterization may lead to a sudden decrease in bladder pressure, resulting in increased mucosal permeability, congestion and swelling, thus causing hematuria.

The first catheterization of urinary retention patients should be controlled slowly to gradually decompress the bladder. The catheter can be retained for continuous drainage to control the condition before the cause is completely removed.