Complications of a cylinder with an excessive length:
(1) S-shaped deformity to the penis
(2) fold at the base with excessive wear causing a wall defect with fluid leakage
(3) fold at the base with excessive wear causing a cylinder aneurysm
Recommended method for measuring the cylinder:
(1) Make a 2 cm longitudinal incision for the corporotomy.
(2) Measure the diagonal distance from the proximal edge of the incision to the center of the proximal end of the corpus cavernosum (length X)
(3) Measure the diagonal distance from the distal edge of the incision to the center of the distal end of the corpus cavernosum (length Y).
proper length of the cylinder in cm =
= (length X in cm) + (length Y in cm)
If the penis is perfectly straight (without significant curvature) and the 2 cm incision is centered over the midpoint of the corpus cavernosum, then:
proper length of the cylinder in cm =
= 2 * SQRT(((((length of the corpus in cm) - 2) / 2)^2) + ((radius of penis in cm)^2))
where:
• This formula calculated 2 equal hypotenuses for right angle with verticals separated by 2 cm.
