Method of making an intramedullary bone plug and bone plug made thereby
US4686973A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1984 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Oct 12, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/30581
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This invention relates to a method of making an inflatable bone plug for plugging the open end of an intramedullary bone canal which is capable of restricting the flow of bone cement, particularly, during the insertion of bone cement, particularly during the pressurized injection of such a cement, during an operative procedure involving the fixation of the stem of an artificial joint prosthesis such as a femoral hip joint prosthesis to the end of a bone such as a femur. The bone plug is designed to be pressurized with a biocompatible fluid and to thereafter deflate in a controlled manner after the cement hardens. Preferably, the bone plug is made by forming a hollow expandable container of a silicone elastomer permeable to carbon dioxide gas which has a valve stem attached to one end of the container and an opening at the opposite end of the container. A shrinkable elastomeric band is placed over the valve stem in which a channel has been made to receive a further cooperating injection means such as a needle. The elastomeric band shrinks over the valve stem to form a resealable valve assembly. The valve assembly is located in the hollow interior of the bone plug and the opening opp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.