The failure to urinate after removal of the urinary catheter is considered to be related to the failure to train bladder function before catheter removal, urethral infection, urethral obstruction and so on. 1. Failure to train bladder function before extubation: If the urinary catheter is continuously open during the indwelling catheterization period, it can result in causing weak contraction of bladder forced urethral muscle, and insufficient contraction force of bladder forced urethral muscle after removing the urinary catheter, which can’t expel urine from the bladder through muscular contraction and squeeze, and the patient consciously feels that he/she is difficult to urinate and has difficulty in urination, or even can’t urinate after removing the urinary catheter. 2. Urethral infection: bacterial infection occurs during the insertion of urinary catheter, and after the removal of the catheter, there is congestion and edema of the urethral mucosa or even combined with urethral infection, which increases the resistance in the urethra, and the pressure of the bladder has to overcome the greater urethral resistance when trying to urinate, so the patient feels that it is difficult to urinate, or even impossible to urinate in severe cases. 3. Urethral obstruction: There have been diseases of urethral obstruction before, such as urethral stenosis or prostate hyperplasia symptoms, etc., and the primary disease has not been removed. This symptom alone is not enough to diagnose the disease, and may be caused by other factors. It is recommended that the patient consult a doctor in a timely manner to clarify the cause of the disease and give targeted treatment.
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