This is a protocol for a Cochrane Review (Intervention). The objectives are as follows:

To determine which is the best type of urinary catheter to use in the long‐term management of voiding problems in adults.

We wish to test the following hypotheses.

1. Antiseptic impregnated urethral catheters are better than standard urethral catheters.
2. Antibiotic impregnated urethral catheters are better than standard urethral catheters.
3. Antibiotic impregnated catheters are better than antiseptic impregnated catheters.
4. One type of standard urethral catheter is better than another.
5. One type of antiseptic impregnated urethral catheter is better than another.
6. One type of antibiotic impregnated urethral catheter is better than another.
7. One type of intermittent catheter is better than another.