Talk to Urologist on Urinary Retention

He is a Parkinson' s patient and started to have urinary retention 2 weeks back and swelling in legs Ultrasounds were done. (Attaching files) Doctor prescribed him cefspan for 5 days. And a bag was placed on 26 Jan and removed on 29 ...he felt better with bag.but after it was removed he again has retention especially at night it's difficult to pass urine only drops Five days antibiotic is completed today please guide what to do?