Force sensing distal femoral alignment system and method of use

US9980735B2 · kind B2 · utility

Assignee

• Synvasive Technology, Inc. · US

Inventors

• Barjinder Chana · Reno, US
• Michael G. Fisher · Blieskastel, DE
• Michael Haight · Sacramento, US
• Leo Beckers · Grimbergen, BE

Key dates

• Filing date: Apr 21, 2015
• Grant date: May 29, 2018
• Expiry date: Nov 16, 2035

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2090/064
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Devices, systems, and methods are provided for facilitating the aligning and balancing of the knee during total knee replacement surgery. A femoral assembly is engaged with a distal femur. The positions of medial and lateral portions of the femoral assembly relative to a stationary portion of the femoral assembly can be separately adjusted to adjust the alignment of the knee. A force sensor will be provided to sense the forces in the medial and lateral portions of the knee, and the medial and lateral portions of the femoral assemblies will be adjusted so that the sensed forces are balanced. The alignment of the knee is visually verified using a knee alignment verification member coupled to the femoral assembly. The knee alignment verification member may emit laser beams along the mechanical axes of the femur and tibia, or the knee alignment verification member may couple to alignment rods aligned along these axes.