Patent ID: 8328846

Claim:
A prosthetic nucleus comprising: a volume of cured prosthetic nucleus material at least partially confined by a membrane; the membrane having a tool attachment section for attachment to a delivery tool to deliver the membrane to a target site via a delivery channel, the tool attachment section having a tool attachment section opening, the tool attachment section opening allowing prosthetic nucleus material before curing to flow through the tool attachment section to at least partially fill the membrane; a portion of the membrane surrounding the tool attachment section opening having a cross sectional area that fits through the delivery channel; the membrane having a second section in fluid communication with the tool attachment section opening that is at least partially filled with prosthetic nucleus material before curing without stretching the membrane so that a volume of cured prosthetic nucleus material at least partially confined by the membrane is too large to fit through the delivery channel but not large enough to stretch the membrane; and the membrane having a second tool attachment section at a distal side of the second section, the second tool attachment section closed at a distal end of the membrane.