Penile Prosthesis: Difference between revisions
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* Paired, solid cylinders that fill each corpus cavernosum | * Paired, solid cylinders that fill each corpus cavernosum | ||
* ''' | * '''Subdivided into malleable vs. positional devices''' | ||
** A malleable device has a central core that allows a patient to position the penis upward for sexual intercourse and downward at other times. | ** A malleable device has a central core that allows a patient to position the penis upward for sexual intercourse and downward at other times. | ||
** A positional device incorporates a series of articulating polyethylene discs with a central metal cable support, which make it better able to maintain upward and downward positions | ** A positional device incorporates a series of articulating polyethylene discs with a central metal cable support, which make it better able to maintain upward and downward positions | ||
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* '''Designed to approximate normal function more closely by permitting girth and length expansion during erection and penile flaccidity when not in use''' | * '''Designed to approximate normal function more closely by permitting girth and length expansion during erection and penile flaccidity when not in use''' | ||
* Consist of 2 hollow intracorporeal cylinders, each of which fills a corpus cavernosum; the cylinders are inflated with saline solution to produce penile rigidity during sexual activity and are deflated after intercourse. | * Consist of 2 hollow intracorporeal cylinders, each of which fills a corpus cavernosum; the cylinders are inflated with saline solution to produce penile rigidity during sexual activity and are deflated after intercourse. | ||
* ''' | * '''Subdivided into 2-piece vs. 3-piece devices''' | ||
** ''' | ** '''2-piece device''' | ||
*** '''Reservoirs in the proximal portion of the cylinders are prefilled with saline''' '''and preconnected to the pump via silicone tubing'''. | ***'''Consists of the two cylinders and a scrotal pump'''. | ||
*** '''Pressing a valve mechanism''' in the pump transfers the solution from the reservoirs into the distal, inflatable portion of each cylinder. | **** '''Reservoirs in the proximal portion of the cylinders are prefilled with saline''' '''and preconnected to the pump via silicone tubing'''. | ||
*** '''Bending the cylinders down for several seconds activates a release valve''' that deflates the device by allowing the fluid to flow back to the reservoirs. | **** '''Pressing a valve mechanism''' in the pump transfers the solution from the reservoirs into the distal, inflatable portion of each cylinder. | ||
** ''' | **** '''Bending the cylinders down for several seconds activates a release valve''' that deflates the device by allowing the fluid to flow back to the reservoirs. | ||
*** Silicone tubing connects the cylinders to the pump and the pump to the reservoir. | ** '''3-piece device''' | ||
*** '''Repeatedly squeezing the pump''' transfers saline from the reservoir to the cylinders until adequate rigidity is achieved | ***'''Consists of the two hollow cylinders, a scrotal pump, and a saline-filled reservoir.''' | ||
*** '''Pressing a valve mechanism in the pump causes the fluid to flow back to the reservoir.''' | **** Silicone tubing connects the cylinders to the pump and the pump to the reservoir. | ||
**** '''Repeatedly squeezing the pump''' transfers saline from the reservoir to the cylinders until adequate rigidity is achieved | |||
**** '''Pressing a valve mechanism in the pump causes the fluid to flow back to the reservoir.''' | |||
** Both devices are available in several widths and lengths and come with optional rear tip extensions to allow them to be tailored to each patient. | ** Both devices are available in several widths and lengths and come with optional rear tip extensions to allow them to be tailored to each patient. | ||
** '''Advantages of two-piece compared to three-piece (2)''': | ** '''Advantages of two-piece compared to three-piece (2)''': | ||