Penile prosthesis

1. An implantable penile prosthesis comprising:

a pair of penile prosthesis cylinders, each of the pair of penile prosthesis cylinders including:

an outer tube member; and

an inner tube member included within the outer tube member, the inner tube member including a plurality of inflatable chamber sections each defined by an exterior wall and an interior wall that enclose an interior cavity of a respective chamber section, at least a portion of the exterior walls contacting the outer tube member, the inner tube member including an inner chamber defined at least partially by the interior walls of the chamber sections, the inner chamber being separate from the chamber sections, the inner chamber extending along a longitudinal axis of a respective cylinder, the chamber sections being disposed adjacent to the inner chamber,

wherein the chamber sections are configured to receive inflation fluid during an inflation state such that inflation of the chamber sections expands a girth of the outer tube member.

2. The penile prosthesis in accordance with claim 1 , wherein the interior walls of adjoining chamber sections press against each other and the exterior walls press against the outer tube member when the chamber sections are inflated with the inflation fluid.

3. The penile prosthesis in accordance with claim 1 , further comprising wall junctions at which portions of the interior walls of adjoining chamber sections are connected.

4. The penile prosthesis in accordance with claim 3 , wherein the wall junctions are attached to the exterior walls.

5. The penile prosthesis in accordance with claim 1 , wherein the inner chamber is devoid of inflation fluid when transitioning from a deflation state to the inflation state.

6. The penile prosthesis in accordance with claim 3 , wherein each of the wall junctions extends along a length of the inner tube member.

7. The penile prosthesis in accordance with claim 1 , wherein the inner chamber is defined by the interior walls of the chamber sections and the outer tube member.

8. The penile prosthesis in accordance with claim 3 , wherein:

the chamber sections are linked together at the wall junctions, the linked chamber sections including a first chamber section and a second chamber section;

the inner tube member comprises an outer wall member having a first end connected to the first chamber section and a second end connected to the second chamber section; and

the inner chamber is formed between the interior walls of the chamber sections and the outer wall member.

9. The penile prosthesis in accordance with claim 1 , wherein the inner chamber includes a material, the material including a silicone-based material.

10. The penile prosthesis in accordance with claim 1 , wherein the interior walls of the chamber sections are thicker than the exterior walls of the chamber sections.

11. The penile prosthesis in accordance with claim 1 comprising:

a pump configured to transfer the inflation fluid from a reservoir to the chamber sections of the pair of penile prosthesis cylinders.

12. An implantable penile prosthesis comprising:

a pair of penile prosthesis cylinders, each of the pair of penile prosthesis cylinders including:

an outer tube member; and

an inner tube member disposed within the outer tube member, the inner tube member including a plurality of inflatable chamber sections, each chamber section being defined by an exterior wall and an interior wall that enclose an interior cavity of a respective chamber section, at least a portion of the exterior walls contacting the outer tube member, the inner tube member including an inner chamber defined at least partially by the interior walls of the chamber sections, the inner chamber being separate from the chamber sections, the inner chamber extending along a longitudinal axis of a respective cylinder, the chamber sections being disposed adjacent to the inner chamber;

wherein the chamber sections are configured to receive inflation fluid during an inflation state such that inflation of the chamber sections expands a girth of the outer tube member and increases a stiffness of the outer tube member, the inner chamber being devoid of inflation fluid during the inflation state.

13. The penile prosthesis in accordance with claim 12 , wherein the chamber sections are disposed outside an exterior of the inner chamber.

14. The penile prosthesis in accordance with claim 12 , wherein the inner chamber includes an open-cell material.

15. The penile prosthesis of claim 12 , further comprising:

a pump configured to transfer the inflation fluid from a reservoir to the chamber sections of the pair of penile prosthesis cylinders.