Leg Rotation Calculator

Michael L. Richardson, M.D.
Lauren K. Toney, M.S., M.D.
University of Washington Department of Radiology

Version 1.0
Last update: August 4, 2013

Please input the following information about your patient:

Enter angles as positive numbers and use radio buttons to specify direction of rotation.

Indicate which side of the patient is the normal side (default is right).

Right side is normal
Left side is normal

Side of measurement Right Left
Proximal Femur external
internal 		external
internal
Distal Femur external
internal 		external
internal
Proximal Tibia external
internal 		external
internal
Distal Tibia external
internal 		external
internal

Total Femoral Rotation
Difference in Femur Rotation
 
Total Tibial Rotation
Difference in Tibial Rotation
 
Total Leg Rotation
Difference in Leg Rotation
 
The following text may be useful for cutting and pasting...

Convention: Rotation at each site is measured with respect to a horizontal line.
Rotation of a bone is then taken as rotation of distal end with respect to proximal end
(similar to displacement in fracture description), as in the example below.

Disclaimer: This program is meant as a training aid for teaching residents about rotational deformities of limbs.

This calculator is experimental and MAY NOT WORK AT ALL.
Making diagnostic or treatment decisions based on its output could be risky.
The authors and the UW Department of Radiology are not responsible
for any of the crazy things you do with the output from this program.