Patients in this group with hip fracture will get an indwelling catheter at arrival to the orthopaedic ward. The patients with arthrosis get the indwelling catheter in the morning at the day of surgery. In both cases the indwelling catheter is inserted after shower with skin disinfectant. The catheter system is kept close. The catheter will be removed in the morning on day 2 after surgery. The patients are bladder-scanned every four-hour until normal bladder function is recaptured. If the bladder volume exceeds 400ml and the patient is unable to urinate, the patient will be re-catheterised. The procedure of the patients in this arm is in accordance with common practice in the Orthopaedic clinic.

Patients randomised to this arm will urinate either in a toilet or in a bedpan or a diaper when needed. Bladder scan control will be performed on these patients at least every four hour. If the patient is unable to urinate and bladder scan indicates ≥ 400 ml urine in the bladder, the patient will be intermittent catheterised.

Patients randomised to the I group will urinate either in a toilet or in a bedpan or a diaper when needed. Bladder scan control will be performed on these patients at least every four hour. If the patient is unable to urinate and bladder scan indicates ≥ 450 ml urine in the bladder, the patient will be intermittent catheterised.

Normal bladder function was in this study defined as a post-micturition residual urine volume of 150ml or less.The patients will be bladder-scanned every fourth hour until normal bladder function is recaptured