Procedure for verifying isometric ligament positioning
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United States of America Patent
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Aug 6, 1991
Grant Date -
N/A
app pub date -
Sep 19, 1988
filing date -
Sep 19, 1988
priority date (Note) -
Expired
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Abstract
For knee reconstruction surgery involving replacement of an anterior or posterior cruciate ligament the present invention is in a process for verifying isometric ligament positioning at the femoral and tibial points of origin that includes, as apparatus, an arrangement of a stud (19) with attached suture (24) to serve as a mock ligament for testing isometry. In practice, as for an anterior cruciate ligament replacement procedure, a surgeon, observing on a fluoroscopic monitor (17), forms a tibial tunnel (18) from a point medial to the tibial tuberosity that exits a test or proposed tibial point of ligament origin. The stud (19) is arranged for turning on a driver (20) that is then passed through that formed tunnel and the stud is turned into the test or proposed femoral point of ligament origin. The driver (20) is then pulled out of engagement with the stud (19) exposing the suture (24) that extends from that stud, which suture (24) is attached under tension to a tension isometer (25) and the knee (10) is flexed through its full range of motion. With an isometrically correct selection of the femoral and tibial ligament points of origin, the tension isometer (25) will show no more than a three (3) pound change in force and no more than a two (2) mm change in ligament length or distance between the two points of origin over a full range of knee (10) flexure.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- GOBLE, E. MARLOWE
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Goble, E Marlowe | 850 E. 1200 North, Logan, UT 84321 | 153 | 24879 |
Somers, W Karl | 651 N. 150 West, Logan, UT 84321 | 16 | 5858 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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