Figure 1. Instructions for assembling catheter and urethra .

a) shows the materials needed to assemble the catheter and penile shaft at home. The tubes have two different diameters.

b) The catheter can be assembled at home with a tube, a balloon and adhesive tape. To test if the catheter is leak-proof, it is blocked with a disposable syringe filled with water.

c) For the simulated penis shaft, the tube (larger diameter than catheter) is wrapped with a tea towel and this is fixed with adhesive tape.