Femure lecture week 2 Flashcards
describe Coxa valga
When the femoral inclination angle has not reduced to 128
what is inclination angle of hip joint
The angle between the long axis of HOF and NOF and the long axis of shaft of the femur
Coxa vara
The decreased angle of inclination.when the femoral inclination has reduced past 128
what is the inclination angle at 3 weeks after birth
150
what is the aetiology of Coxa Valga
Lack of development of HOF &NOF relative to the shaft of the femur (Dysplasia).
what is the etiology and presentation of coxa vara?
The primary defect in the endochondral ossification of the med asp of the NOF. the shorter limb on the affected side
Decreased abd+med rotation
Positive Trendlenberg test
Describe Femoral anteversion
Turned tilted further towards the anterior asp
Describe femoral retroversion
Turned or tilted away from the anterior asp
what is the torsion angle
angle formed between the axis of HOF+NOF and TCA
In what direction is Femoral antitorsion
Meidally rotated thigh
in what direction is femoral retrotorsion
Laterally rotated thigh
What is the poistion of Hip at birth in terms of antiversion and torsion?
- Anti-version=60
Anti-torsion=30
Therefore overally laterally rotated of 30
what is the normal amount of antiversion in adults and when it happens?
normal range is 15-20. when the greater trochanter of femur is at its most prominent position
Ryder’s test formula
Femoral torsion= Ryders test outcome+/- assumed amount of anteversion
What is the ideal Ryders test result in adult?
adult med/lat rot 45/45 therefore riders test finding is 0+ assumed (15-20) which is equivelant of 15-20 antetorsion
What is the Ryders test result in paediatric
Ryders test result is 20 med
20+ (15-20)=35-40 anti-torsion
What is the pathological degree of anti-torsion normative data result?
anything above 55 upto 60
what does a position of anti-version and retro torsion indicates in gait?
laterally rotated gait profile+ retrograde pronatory forces
what does a position of retroversion and antetorsion indicate in gait?
Medially rotated gait profile+either supinated type foot or splayed pronated foot type
Leg calf perthes disease
idiopathic juvenile avascular necrosis of the HOF
More common in boys than girls
most prevalent in children age 4-12
what are the sign and symptoms of leg calve perthes disease
Pain at the groin or anterior hip joint, greater trochanter, or knee
limping, exacerbated with activity, and alleviated with rest
dec medial rotation and abd
positive Trendlenburg
What is the treatment aim of legg calve perthes disease
preserve and maintain HOF sphericity
reduce the risk of degenerative arthritis
maintained in ext rot, abd and flexion
what is SUFE
slipped upper femoral epiphysis or slipped capital femoral epiphysis
NOF+SHAFT displace upward and anteriorly.
It happens more in LF than RF. bc the left leg goes under the right leg
SUFE presentation and sign and symptoms?
groin pain radiating to anteromedial thigh
antalgic limp
limited abd, flexion and int rot
common in obese male
