Illiosacral/Pelvic ME Flashcards
Non-physiological movements vs physiological movements
Non-physiological movements
- generally induced by trauma
- evidence by joint/muscle and CT elements being in positions that are NOT physiological ROM Or AOM
Include:
- innominate shears (superior/inferior)
- pubic shears (superior/ inferior/compression/ distraction)
Physiological movements
- generally induced by over working
- evidence by joint/muscle and CT elements being in positions that are physiological ROM Or AOM but are dysfunctional since they are not in neutral
Include:
- rotations (anterior/posterior)
- flares (inflare/outflare)
Innominate rotation movement
Rotate around the inferior transverse axis of the sacrum located at inferior part of SI joint
Anterior innominate rotation
ASIS moves inferiorly and the PSIS moves superiorly around the inferior transverse axis
Posterior innominate rotation
ASIS moves superiorly and the PSIS moves inferiorly around the inferior transverse axis
Pelvic outflare
Ipsilateral ASIS of the (+) standing flexion side is farther away from the midline, but is still at the same level as the the normal ASIS
Pelvic inflare
Ipsilateral ASIS of the (+) standing flexion side is closer to the midline, but is still at the same level as the the normal ASIS
Superior innominate shear
Ipsilateral ASIS and PSIS of the (+) standing flexion test side is superior compared to the other side
Inferior innominate shear
Ipsilateral ASIS and PSIS off the (+) standing flexion test is inferior compared to the normal side
Iliosacral diagnosis steps
1) standing flexion test
- if (+) on one side, that is the side of the dysfunction
2) physician reseats pelvis on supine patient
3) ASIS compression test (optional)
4) measure ASIS levels, pubic rami levels and supine leg length on the supine patient
5) physician reseats pelvis on prone patient
4) measure PSIS, ischial tuberosity is and prone leg lengths on prone patient
Standing flexion test
Physicians thumbs are placed on inferior slope of patients PSIS with rest of fingers on supero-lateral surface of iliac crests
Maintain firm pressure and follow bone only
Patient is to actively bend forward at waist slowly to touch toes
- allow pelvis to come back to you, dont resist
Physician keeps their eyes level with PSIS
(+) side is if one PSIS moves more CEPHALAD than the other at the end of range of motion
(-) is if PSIS are symmetrical at end of range of motion
Why does the standing flexion test positive side the one that has the superior PSIS?
As patient bends forward, spine and L5 go first, then sacrum, then innominate
If a patient has a iliosacral dysfunction, then the innominate and sacrum will be “glued” so innominate rotates forward quicker and more superior than the normal side
Possible reasons for false negatives and positives
Tight hamstrings
Tight Iliopsoas
Leg length discrepancy > 1/2 inch at rest
Unilateral sacral dysfunction
How to reseat pelvis supine
Actively
- patient lays supine with knees bent, feet on table and hips on table
- patient lifts hips off table
- patient then slowly returns hips to table
- patient then straightens legs out
- physician pulls legs straight and relaxes traction to measure leg length
Passively
- same steps except step 2 is done by the physician rather than patient
ASIS compression test
Stand at level of patients hips
Place palms on thenar eminences on the ASIS
Compress with mild/moderate A->P medial force at 45 degree angle through ASISs
Sequentially induce an impulse to spring the joints
(+) = blocked relative motion
really only used if standing flexion cant be done
Reseat the pelvis prone
- must be done passively*
1) patient lays prone
2) physician grabs patients legs and lifers patients hips up
3) physician centers hips over table and returns legs to table
40 physician ensures feet are off table and in neutral and then pulls on legs/relaxes to measure leg length