Use of a Computed Tomography Based Approach to Validate Noninvasive Devices to Measure Rotational Knee Laxity
Table 2
Angular rotation achieved by CT and P2 on female volunteers (FVs) and male volunteers (MVs).
Torque (Nm)
Rest
External (°)
Internal (°)
0
−5
−10
−15
+5
+10
+15
FV1
CT
0
−20
4
7
11
CTFD
0
−19
9
12
24
P2
0
−36
22
33
43
FV2
CT
0
−20
−22
−22
11
CTFD
0
−24
−32
−38
10
P2
0
−41
−50
−60
20
FV3
CT
0
−22
−26
7
7
CTFD
0
−26
−35
15
19
P2
0
−47
−61
28
36
AVG♀
CT
0
−20
−22
−24
8
7
9
CTFD
0
−22
−29
−37
10
14
22
P2
0
−39
−49
−61
21
31
40
MV1
CT
0
−9
4
7
5
CTFD
0
−9
6
11
14
P2
0
−15
11
24
32
MV2
CT
0
−22
−26
−27
6
CTFD
0
−23
−31
−37
10
P2
0
−27
−38
−45
17
MV3
CT
0
−20
−23
23
25
CTFD
0
−26
−35
30
33
P2
0
−36
−45
43
53
AVG♂
CT
0
−16
−23
−25
5
15
15
CTFD
0
−16
−29
−36
8
21
24
P2
0
−21
−37
−45
14
34
43
AVG
CT
0
−18
−23
−25
6
11
12
CTFD
0
−19
−29
−36
9
17
23
P2
0
−30
−43
−53
18
32
41
Tibia-Femoral Rotation (TFR) measured by using the following. (i) CT: Computed Tomography. (ii) CTFD: Computed Tomography including Femoral Deviation. (iii) P2: Rotameter P2.
