Method of and means for measuring ligament tension

Details Method of and means for measuring ligament tension Method of and means for measuring ligament tension

1989-08-31

1990-10-23

Hafer, Robert A.

Surgery

Instruments

Orthopedic instrumentation

606103, 623 13, A61F 500, A61F 208

Patent

active

049648624

ABSTRACT:
The novel ligament tension measuring device has a looped prosthetic ligament or sutures that surround a receptacle. The receptacle contains a positioning hole that allows a fixation pin to be inserted to obtain the optimum position for the desired process. The receptacle also has measuring devices, such as strain gauges or magnets and hall effect sensors. The method includes the steps of: preparing to attach the ligament to the bone; placing the device into the loop of the ligament at the tibia; adjusting the tension on the measuring device; temporarily attaching the ligament at the desired position; pinning the device in place; moving the knee through the entire range of motion; repositioning the device as necessary for the optimum position; removing the device, while leaving the pin in position; and proceeding with the permanent attachment of the ligament.

REFERENCES:
patent: 4301551 (1981-11-01), Dore
patent: 4597766 (1986-07-01), Hilal
patent: 4712542 (1987-12-01), Daniel
patent: 4739751 (1988-04-01), Sapega
patent: 4773910 (1988-09-01), Chen
patent: 4834752 (1989-05-01), Van Kampen
patent: 4851005 (1989-07-01), Hunt

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