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What is Sacroiliac Joint Dysfunction?
Definition
The sacroiliac joint is becoming recognized as a structure which when injured causes pain in the buttocks which may extend into the back of the thigh and even down to the calf and foot. Because that pain pattern is similar to the pain pattern which results from ruptured discs Sacroiliac joint pain is often misdiagnosed and untreated.
The sacroiliac joint is a very complex structure which functions like the keystone in an arch holding the pelvis in place and distributing the weight of the upper body across the pelvis to the legs. The sacroiliac joint is held in place by a number of ligaments which attach to the muscles of the buttocks, the thigh and the spine. The joint and its ligaments and muscles are often injured by falls on the buttock, in car accidents and by "missing the step off of a curb or stair.
Symptoms
Patients describe the pain arising from the joint as a deep, dull ache which varies in intensity from incapacitating to a dull constant presence. That pain is aggravated by sitting, stair climbing, driving and walking. The pain is often associated with muscle spasms of the back. Because the pain may sound like the pain arising from a damaged disc patients are often directed to MRI's or CT scans in an attempt to define the pain as arising from the disc. Problematically those studies often show structural changes in the disc and although those changes are not responsible for the patients pain attention is diverted away from the SI joint and toward the disc.
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Strains of the sacroiliac joint are often due to falls or forceful twisting motions. The pain can be severe! It is usually worse when getting up from a chair or climbing stairs and it is often difficult to find a position of comfort. Urinary frequency may occur in women as well as discomfort with bowel movement and sexual intercourse. The pain can be felt as an ache in the whole leg and might involve both legs.
A herniated disc might occur at the same time (often at the L4-5 level because of a ligament between the vertebra and the SI joint) causing concomitant true sciatica. The herniated disc is usually recognized and surgically treated but the pain does not resolve because of the concomitant sacroiliac strain! This is a scenario that I have encountered many times in clinical practice.
Sacroiliac pain is due to subluxation of the joint. The range of movement is small and therefore cannot be detected on XRs. Sacroiliac dysfunction must be diagnosed by clinical exam.
The two sides are compared for symmetry with the painful side considered the abnormal one. The ilium can be rotated anteriorly or posteriorly. There can be an upslip (the most frequent) or downslip. Often, the sacrum is also rotated, placing strain on the facets (the joints of the spine). Those subluxations can be determined by clinical examination and reduced with various manipulations and exercises.
Some other tests are meant to mobilize the joint and exacerbate the pain to confirm the diagnosis but the condition can be so painful that they are not often used.
Numbing the sacroiliac joint with local anesthesia usually confirms the diagnosis if the pain disappears while the medication is active. Adding steroids (cortisone derivatives) will decrease the inflammation and help treatment. However, if the joint remains in an abnormal position, the pain usually comes back.
Conservative treatment consists in realigning the joint with appropriate manipulations, then strengthening the tendons and surrounding muscles with exercises to keep it in position. Sometimes, a sacroiliac belt that tightens around the hips might be of use.
www.vh.org/adult/provider...on/06.html
home.inreach.com/doodle/s...fusion.htm
www.bonesdoctor.com/sacro...ction.html
www.painandwellness.com/n...ddsjd.html
neuro-mancer.mgh.harvard....00648.html
www.blackwell-synergy.com...02.02002.x



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