The KT1000 Arthrometer

The KT-1000 arthrometer will normally show a side-to-side difference of less than 5mm (Fig. 3.1). The slope of the curves that are pulled with the KT-2000 demonstrate the difference. Force of 15,20, and 30 pounds is applied to the vertical axis of the knee; the horizontal axis shows millimeters of displacement. The curve on the left shows the normal anterior cruciate ligament. The middle curve shows that there is initially more displacement, but then a firm restraint to anterior translation. This corresponds to the firm end point to the Lachman test. The third curve on the right is the anterior cruciate deficient knee with complete rupture. The stronger the pull, the more anterior displacement.

-

_

-

-

-

- J

1

1

1

1

1

N

1

P

1

1

C

1

1

Figure 3.1. The force displacement curve of the partial ACL tear.

Figure 3.1. The force displacement curve of the partial ACL tear.

Was this article helpful?

0 0

Post a comment