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CONTRAST II
myelo, disko, radiculo
| Question | Answer |
|---|---|
| General term applied to radiologic examination of the CNS structures situated within the vertebral canal. | Myelography |
| Injections into the subarachnoid space. | Intrathecal injections |
| Most common site of intrathecal injections. | L2-L3 or L3-L4 interspace |
| Spinal needle injection and site for contrast media injection. | Subarachnoid space |
| It is a safe area; also used as injection site for epidural. | L2-L3 or L3-L4 interspace |
| Type of contrast media used in intrathecal injections | Non-ionic water soluble contrast media |
| Between C1 & Occipital Bone; location of the subarachnoid space where there is a large accumulation/reservoir of CSF. | Cisterna Magna |
| Alternative injection site used only when there is obstruction from trauma. | Cisterna Magna |
| Myelography is not used anymore because of this modality; It will only be used when this is contraindicated. | MRI |
| A non-water-soluble, iodinated ester introduced in 1942. | Pantopaque / Iophendylate |
| Requirement after using Pantopaque because it cannot be absorbed by the body. | Aspiration |
| The first water-soluble, non-ionic, iodinated contrast agent (late 1970s). | Metrizamide |
| In the present, these provide good visualization of nerve roots and good enhancement for follow-up CT of the spine and are readily absorbed by the body. | Non-ionic, water-soluble contrast media |
| Has iodine, is non-toxic and safe for the kidneys, does not dissociate, and better tolerated. | Non-ionic (low osmolar) |
| Preparation of examining room is done in this type of environment. | Sterile environment |
| In examination procedure, this is rarely necessary | Premedication |
| Type of sedation given to patient during myelography | Mild sedative |
| Term meaning “marrow.” | Myelo |
| Soft fatty vascular tissue where RBC is produced. | Marrow |
| Greek root meaning “take a picture.” | Graphos |
| Cisterna Magna is used only when there is obstruction from ______. | Trauma |
| Myelography is employed to show ______ spinal cord compression. | Extrinsic |
| Caused by herniated disk, bone fragments, tumors, and spinal cord swelling resulting from traumatic injury. | Extrinsic spinal cord compression |
| Patient should be well hydrated due to use of ______. | Non-ionic water-soluble contrast media |
| Approximate volume of contrast media injected intrathecally. | 9 to 12 ml |
| Instrument used to observe and control travel of contrast media. | Fluoroscopy |
| Table positioning that allows gravity to redirect contrast media to ROI. | Table angle |
| Reason for maintaining head in fully extended position during Trendelenburg. | Contrast media flow will be blocked at the neck area |
| Preliminary image taken before contrast injection. | Scout |
| Type of lumbar image included in preliminary study. | Cross-table lateral lumbar spine in prone |
| Laboratory test that may be withdrawn during procedure. | CSF |
| Laboratory value checked before procedure. | Creatinine |
| Central ray level for cervical lateral projection. |
Created by:
yulyae