Femoral trochanteric angle
Femoral trochanteric angle
- Synonym: Femoral condyle trochanteric angle
- Acronym: FTA
Definition
The femoral trochanteric angle (or femoral condyle trochanteric angle) is a measurement used to assess angular deformities of the femur and provide guidance for corrections. It is determined from multiplanar reconstructed CT images of the femur. A transverse plane is used to visualize the entire diaphysis of the femur as a straight cylinder by scrolling through sequential images.
The femoral trochanteric angle is the angle between the intertrochanteric axis and the transcondylar femoral axis.
The following values have been published for the femoral trochanteric angle
Healthy English Staffordshire Bull Terriers: 30.68 ± 4.56° Newman and Voss 2017
Healthy Labrador retriever: 29.4 ± 4.7° Mostafa et al. 2009
References
Mostafa AA, Griffon DJ, Thomas MW, Constable PD. Morphometric characteristics of the pelvic limbs of Labrador Retrievers with and without cranial cruciate ligament deficiency. Am J Vet Res. 2009 Apr;70(4):498-507. doi: 10.2460/ajvr.70.4.498.
Newman M, Voss K. Computed tomographic evaluation of femoral and tibial conformation in English Staffordshire Bull Terriers with and without congenital medial patellar luxation. Vet Comp Orthop Traumatol. 2017 May 22;30(3):191-199. doi: 10.3415/VCOT-16-12-0162. Epub 2017 Mar 23. Erratum in: Vet Comp Orthop Traumatol. 2017 Jul 10;30(4)