hip pathology Flashcards
What is the orientation of the acetabulum?
anterior
lateral
inferior
What is the orientation of the femoral head?
posterior
medial
superior
What is the normal angle of inclination?
125 degrees
definition: Pathologically larger angle of inclination
-Unilateral
- Relatively longer leg
- genu varum
Coxa valga
definition: Pathologically smaller angle of inclination
- Unilaterally
- Relatively shorter leg
- Genu valgum
- Leading to pronation
coxa vara
definition: Angle formed by transverse axis of the femoral condyles and the axis of the neck of the femur
torsion
definition: decrease in the femoral neck angle of the femur on the tibia
retroversion
definition: increase in the femoral neck angle of the femur on the tibia
anteversion
What is the normal femoral neck anteversion?
15 degrees
definition: ASIS move anteriorly and inferiorly
- Results in hip flexion and lumbar spine extension (hyperextension)
- Hip flexors and back extensors
Anterior pelvic tilt
definition: PSIS move posteriorly and inferiorly
- Results in hip extension and lumbar spine flexion
- Hip extensors and trunk flexors
posterior pelvic tilt
Where does the sciatic nerve leave the pelvis?
through the lower edge of the greater sciatic notch
The sciatic nerve passes deep to the ___ muscle and/or through it.
piriformis
What are the nerve roots of the sciatic nerve?
L4-S3
What does entrapment of the sciatic nerve cause?
- Sensory changes along the lateral and posterior portion of the leg and dorsal and plantar aspect of foot
- Progressive weakness in hamstrings, part of adductor magnus, and all muscles of leg and foot
- SIJ pain
What are the nerve roots of the obturator nerve?
L2-L4
Entrapment of the obturator nerve leads to what?
- Sensory changes along the medial aspect of thigh
- Weakness primarily in adductor muscles
What population is hip OA most common in?
Females > 60 y/o
What is the patient presentation of early DJD?
- Pain in groin or along L3 dermatome along anterior thigh and knee
- Stiffness in AM; better with movement
- Pain on WB during gait or @ end of day after activity
- Antalgic gait (pt may limp)
- decreased joint space on an x-ray
What AD can be used to decrease compressive forces to the hip with hip OA?
cane
What are the s/s of end-stage OA?
unrelenting pain
What special tests can help Dx hip OA?
scour
grind
FABER
definition: Usually due to an excessively tight ITB or possibly leg length discrepancy
IT band friction syndrome
What is the typical patient presentation for IT band friction syndrome?
- discomfort proximally (region of greater trochanter) or distally (lateral aspect of knee, possibly L5 dermatome)
- Tightness easy to palpate
- aggs: Walking or running excessively on hills, stairs, or uneven terrain
What are special tests used for Dx IT band friction syndrome?
Ober/modified ober
Nobel’s compression
What are the intra-articular causes of snapping hip syndrome?
Loose body
Synovitis
Subluxation
Cartilage defect
Labral tears
What are the extra-articular causes of snapping hip syndrome?
- Thickening of post border of ITB
- Iliopsoas tendon over the iliopectineal eminence
- Iliofemoral ligaments over the iliopectineal eminence
What is the Iliopsoas involvement in snapping hip syndrome?
- snapping with ABD and ER
- groin and/or anterior hip pain
What does legg-calve perthes disease begin as?
avascular necrosis of the secondary epiphysis of the femoral head
What is the common age range for Legg-calve Perthes disease?
2-12 y/o (commonly age 6)
Legg calve perthes disease commonly affects (boys/girls) more.
boys
(true/false) Legg calve perthe disease normally heals
true
If legg calve perthes disease does not heal, what would the typical presentation be?
Antalgic gait with soreness in hip, thigh or knee
ROM may be limited esp IR and ABD
Involved limb may be 1-2cm shorter
What is the most common hip disorder during the adolescent years, usually 10-17 y/o for boys and 8-15 y/o for girls?
SCaFE
SCaFE commonly affects (boys/girls) more.
boys
Treatment of SCaFE includes Bracing in ___ and ___ for 12-14 weeks
ABD and IR