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adv pos myelography
advanced positioning myelography
Question | Answer |
---|---|
Myelography | the radiographic study of CNS structures within the vertebral canal |
Contrast is injected where during myelography? | the subarachnoid space |
What interspace is used for the needle placement? | L2-L3 or L3-L4 or C1-2 |
Causes of spinal cord compression | herniated disk, bone fragments, tumors, swelling from trauma |
Contraindications for myelography | blood in the CSF, arachnoiditis, increased ICP, recent LP |
Types of contrast used for myelography include: | (water soluble non-ionic) iohexol, iopamidol, ioversol |
How much contrast is used for a myelogram? | 9-12 ml |
Fenestrated drape | drape with a hole in the middle |
What gauge needle is used for a myelogram? | 20-22 |
Patient prep for a myelogram includes what? | ensuring the patient is hydrated and that the exam and possible complications are explained. |
Patient position for a myelogram | prone with pillow under abdomen. Spine flexed for lateral |
How do we ensure proper needle placement? | the rad draws CSF |
How should tubes of CSF be labeled? | in the order they were drawn |
How much and why is the head elevated for a cervical myelogram? | 30-45 degrees to keep the contrast from entering the ventricles |
What position is the neck in for cervical myelograms? | hyperextension |
How long is the recovery time for a myelogram? | 4-8 hours |
Typical abnormal findings for a myelogram include: | deformity within the subarachnoid space, and obstruction of the flow of contrast |