Neck length measuring device and method of using same for implanting a hip prosthesis
US5792143A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1997 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Apr 21, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0097
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of implanting a hip prosthesis includes utilization of a device at the implantation site to confirm that the femoral prosthesis will have a neck length corresponding to a preoperative plan. First, a desired neck size for the femoral prosthesis is determined. Then, the femoral prosthesis is positioned in the femur. Next, a locator rod component is advanced toward the femoral prosthesis along an axis parallel to the longitudinal axis of the femoral prosthesis until a greater trochanter locator mounted on the side of the locator rod component is as close as possible to contacting the greater trochanter of the femur. Next, a neck sizing component, which has neck size markings on its outer surface, is placed on the neck projection of the femoral prosthesis. Finally, a reference distance is determined by identifying which of the reference distance markings of the locator rod component corresponds to a desired neck size marking on the neck measuring device along a line substantially perpendicular to the longitudinal axis of the femoral prosthesis. The determined reference distance should correspond to a planned reference distance that was determined in an appropriate preoperative…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.