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Myelography

QuestionAnswer
How far down does the spinal cord extend? L1 - L2
What is the conus medullaris? pointed end of the spinal cord
How many pairs of spinal nerves are there? 31
From which part of the spinal cord do nerves come from? each side
- three continuous, protective membranes that enclose the brain and spinal cord meninges
- inner sheath; highly vascular and closely adhered pia mater
- delicate central sheath arachnoid
- wide space between arachnoid and pia mater subarachnoid space
- general term applied to the radiologic examination of the CNS structures situated in the vertebral canal myelography
What are the most common puncture sites for myelography? l3-L4 and sometimes L2-L3
Why does the image intensifier need to be locked? to prevent accidental contact with sterile field or spinal needle
What is the most common scout image? cross table lateral L-spine prone
Along with the prone position, what is another position that can be used for the procedure? lateral with spine flexed
How much contrast is generally used? 9 - 12 mL
Why is the table angled trendelenburg? visualization of the cervical region
Why is the table angled Fowler's? to see the thoracic and lumbar regions
If contrast is in the cervical region, how is the head positioned and why? in actue extension to prevent contrast from entering ventricular system
What is the only position that will prevent contrast from entering ventricles? acute extension
What is used to demonstrate encroachment on and compression of the spinal cord as a result of disk herniation, tumor growth, degenerative diseases or posttraumatic swlling of the cord? myelography
What type of herniation is NOT demonstrated in myelography? anterior protrusion of a herniated disk
What is diskography? What is demonstrated? injecting contrast medium into the individual disks; internal disk lesions
Created by: erikasmith28