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A perineal urethrostomy can be performed in sternal recumbency with the patient's hind legs hanging over the end of the table and the tail retracted cranially, as long as there is padding to prevent obturator nerve compression. A roll of bubble wrap can be used, or towels placed under the patient's pelvis (Figure 2.11). Alternatively, the patient can be placed in dorsal recumbency with the hind limbs retracted gently cranially (Figure 2.12). The necessary instruments are listed in Box 2.6 and illustrated in Figures 2.13 and 2.14.