Posterior Inferior Subluxation Ilium

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Transcript of 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