Artificial Urinary Sphincter Placement Preserving the Bulbospongiosus Muscle

In our opinion, AUS placement preserving this muscle, it has several anatomical advantages. Firstly, could decrease the risk of urethral injury during the sharp dissection of its dorsal wall, often unnoticed. Sometimes, that is misinterpreted as early erosion (especially in patients with a history of previous surgery or radiotherapy (who are at greater risk). 

Secondly, according to figure (two black arrows), preserving the muscle allows to increase several millimeters the posterior wall on which the cuff is seated. Anatomical studies show that the posterior wall is the thinnest part of the circumference, therefore, gaining several millimeters at that level is very important. Finally, hypothetically, it could better preserve the blood flow to the urethra (less dissection of the bulbous urethra).