Matching the Thoracic kyphosis, Lumbar Lordosis, and Pelvic Incidence in the sagittal plane is the key to optimal alignment in adult spinal deformity surgery
The concept applies to the coronal plane as well. We need to match the fractional lumbosacral curve, lumbar scoliosis, and thoracic scoliosis.
This patient with a prior harrington rod who underwent surgery for difficulty standing upright, back leg and radiculopathy.
We can see that the patient is compensating preop using their lower extremities. Considering the PI, TK, LL match I planned for a lordosis of 31 in this patient with thoracic kyphosis of only 8 and pelvic incidence of 50.
Similarly, I planned partial reduction of the lumbar scoliosis using differently shaped rods to match the thoracic scoliosis.
Screws were planned around the existing rods.
Postop X-rays show a well aligned spine in both planes with no further need for additional compensation from the lower extremities
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To learn more about this topic. Read our article titled: Sagittal spinal alignment varies with an individual’s race: results of the multi-ethnic alignment normative study (MEANS)
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