posterior inferior subluxation ilium
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Pelvis
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Directions of Ilium Misalignment
The basic directions that the ilium can become misaligned with the sacrum
Anterioward Posteriorward Medialward Lateralward
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Where the Misalignment Occurs
Occurs in the sacroiliac articulation Tendency to think subluxations occur at the hip joint
Emphasis is placed on the Ilium
An AS/PI misaligned ilium travels in an arc due to: Nature of the auricular surfaces of the joint Angle of the pelvis itself
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Changes Accompanying the AS and PI Ilium
AS Ilium in innominate
measurement diagonal length of obturator lumbar curve Lowers femur head height Edematous joint space opens at
posterior-inferior and anterior-superior margins
Leaves sacrum posterior in relation to the ilium
PI Ilium in innominate
measurement diagonal length of obturator lumbar curve Raises femur head height Edematous joint space opens at
posterior-superior and anterior-inferior margins
Leaves sacrum anterior in relation to the ilium
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Measurement of an AS Misalignment
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Measurement of a PI Misalignment
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Changes Accompanying the AS and PI Ilium
AS Ilium in innominate measurement
diagonal length of obturator
lumbar curve Lowers femur head height Edematous joint space opens at
posterior-inferior and anterior-superior margins
Leaves sacrum posterior in relation to the ilium
PI Ilium in innominate measurement
diagonal length of obturator
lumbar curve Raises femur head height Edematous joint space opens at
posterior-superior and anterior-inferior margins
Leaves sacrum anterior in relation to the ilium
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Normal Obturator Appearance
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Obturator Appearance in PI/AS Misalignment
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Changes Accompanying the AS and PI Ilium
AS Ilium in innominate measurement diagonal length of obturator
lumbar curve Lowers femur head height Edematous joint space opens at
posterior-inferior and anterior-superior margins
Leaves sacrum posterior in relation to the ilium
PI Ilium in innominate measurement diagonal length of obturator
lumbar curve Raises femur head height Edematous joint space opens at
posterior-superior and anterior-inferior margins
Leaves sacrum anterior in relation to the ilium
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Lumbar Curve Changes
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Changes Accompanying the AS and PI Ilium
AS Ilium in innominate measurement diagonal length of obturator lumbar curve
Lowers femur head height Edematous joint space opens at
posterior-inferior and anterior-superior margins
Leaves sacrum posterior in relation to the ilium
PI Ilium in innominate measurement diagonal length of obturator lumbar curve
Raises femur head height Edematous joint space opens at
posterior-superior and anterior-inferior margins
Leaves sacrum anterior in relation to the ilium
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Femur Head Height Changes
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AS Ilium Raising Femur Head
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PI Ilium Raising Femur Head
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Changes Accompanying the AS and PI Ilium
AS Ilium in innominate measurement diagonal length of obturator lumbar curve Lowers femur head height
Edematous joint space opens at posterior-inferior and anterior-superior margins
Leaves sacrum posterior in relation to the ilium
PI Ilium in innominate measurement diagonal length of obturator lumbar curve Raises femur head height
Edematous joint space opens at posterior-superior and anterior-inferior margins
Leaves sacrum anterior in relation to the ilium
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Area of the Spongy Disc in AS & PI Ilium
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Changes Accompanying the AS and PI Ilium
AS Ilium in innominate measurement diagonal length of obturator lumbar curve Lowers femur head height Edematous joint space opens at
posterior-inferior and anterior-superior margins
Leaves sacrum posterior in relation to the ilium
PI Ilium in innominate measurement diagonal length of obturator lumbar curve Raises femur head height Edematous joint space opens at
posterior-superior and anterior-inferior margins
Leaves sacrum anterior in relation to the ilium
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Mechanism of In/Ex Ilium
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Changes Accompanying the In and Ex Ilium
In Ilium in width in width at the base of obturator lumbar curve Edematous joint space opens at
entire anterior margin Raises the femur head height Foot will diverge further away from
the median line
Ex Ilium in width in width at the base of obturator lumbar curve Edematous joint space opens at
entire posterior margin Lowers the femur head height Foot will converge toward the
median line
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Ilium Width Changes
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Changes Accompanying the In and Ex Ilium
In Ilium in width
in width at the base of obturator
lumbar curve Edematous joint space opens at
entire anterior margin Raises the femur head height Foot will diverge further away from
the median line
Ex Ilium in width
in width at the base of obturator
lumbar curve Edematous joint space opens at
entire posterior margin Lowers the femur head height Foot will converge toward the
median line
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Normal Obturator Appearance
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Obturator Appearance in In/Ex Misalignment
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Changes Accompanying the In and Ex Ilium
In Ilium in width in width at the base of obturator
lumbar curve Edematous joint space opens at
entire anterior margin Raises the femur head height Foot will diverge further away from
the median line
Ex Ilium in width in width at the base of obturator
lumbar curve Edematous joint space opens at
entire posterior margin Lowers the femur head height Foot will converge toward the
median line
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Lumbar Curve Changes
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Changes Accompanying the In and Ex Ilium
In Ilium in width in width at the base of obturator lumbar curve
Edematous joint space opens at entire anterior margin
Raises the femur head height Foot will diverge further away from
the median line
Ex Ilium in width in width at the base of obturator lumbar curve
Edematous joint space opens at entire posterior margin
Lowers the femur head height Foot will converge toward the
median line
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Changes Accompanying the In and Ex Ilium
In Ilium in width in width at the base of obturator lumbar curve Edematous joint space opens at
entire anterior margin
Raises the femur head height
Foot will diverge further away from the median line
Ex Ilium in width in width at the base of obturator lumbar curve Edematous joint space opens at
entire posterior margin
Lowers the femur head height
Foot will converge toward the median line
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In Ilium Raising Femur Head
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Ex Ilium Lowering Femur Head
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Changes Accompanying the In and Ex Ilium
In Ilium in width in width at the base of obturator lumbar curve Edematous joint space opens at
entire anterior margin Raises the femur head height
Foot will diverge further away from the median line
Ex Ilium in width in width at the base of obturator lumbar curve Edematous joint space opens at
entire posterior margin Lowers the femur head height
Foot will converge toward the median line
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A-P Film Marking Procedure
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A-P Film Marking Procedure
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A-P Film Marking Procedure
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A-P Film Marking Procedure