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11 Cards in this Set
- Front
- Back
What is the principal cause of lateral recess stenosis?
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Superior articular facet hypertrophy
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What are three causes of foraminal stenosis?
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Foraminal HNP
Decreased disk height Pars defect |
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In foraminal stenosis, what are the critical foraminal height and the critical posterior disk height?
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Foraminal height < 15mm
Posterior disk height >4mm |
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Are tension signs present with central or lateral stenosis?
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Not generally
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Why is hyperreflexia not seen with lumbar stenosis? What is the most common neurologic deficit on exam?
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Lower motor neuron (LMN) problem, so no hyperreflexia
L5 most common root for weakness |
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Is there a proven benefit to epidural steroids?
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No consistent benefit in controlled studies
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What type of injection has most consistently demonstrated symptomatic benefit?
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Transforaminal nerve block
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What are the three indications for fusion after decompression of stenosis?
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Degenerative spondylolisthesis
Instability/iatrogenic injury Degenerative scoliosis |
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Is there a proven benefit to instrumentation for stenosis? How about symptomatic relief?
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No proven benefit to instrumentation
Improved symptom relief without instrumentation |
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What age group has poorer decompression outcomes? Are there other prognostic factors?
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Young patients do worse
Patients with multiple comorbidities do worse |
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What is the typical mechanism of extraforaminal L5 root compression? What is the ideal radiographic view to identify it?
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L5 impingement between sacral ala and L5 transverse process
Ferguson's view |