Hi, I am sorry to know about the condition of the patient. The most common problem causing urinary retention in his age is enlarged prostate. This can be diagnosed using ultrasound of kidneys, bladder and prostate. The whole body swelling is most probably due to poor kidney function (as suggested by increased blood urea). Enlarged prostate can itself cause kidney damage due to urinary obstruction leading to swelling in kidney (hydronephrosis). This can also be diagnosed on ultrasound. However, there may be associated conditions like diabetes and hypertension which can also contribute to decreased kidney function. Thus, it is important to evaluate for these conditions, as well as to evaluate the cardiac and liver functions. Once his general condition improves, prostate removal (TURP, Transurethral resection of prostate) can make him pass urine without catheter. Please let me know about his ultrasound report and other blood tests. I can guide you specifically based on them. I hope I have answered your query. Wish him a speedy recovery! Warm regards, Dr. Raguram G MCh (Uro), F. Endouro. AUKI