Thanks for using HCM.
First of all about contrast CT- in this process a ionic or non ionic iodine dye is injected IV and then serial images are taken by CT machine.
Asking for contrast ct after usg with past history of UTI, passage of mucus and paralytic ileus
seems to be a case of intra abdominal abcess in the pelvic region which is pressing the bladder, rather it may be a case of bladder stone secondary to UTI caused by urea splitting organism like proteus, there can be associated reflux pyelonephritis
due to urinary retention
and infection. Enlarged prostate
due to BPH or carcinoma prostate can also cause incomplete voiding and secondary infection in this age group which can be ruled out by ct scan and digital rectal examination
and rectal USG.
Treatment will be according to the final diagnosis for which you should consult your treating doctor. wishing very well to your husband.