A client with increased ICP has the following vital signs: blood pressure 99/60, HR 65, Temperature 10A.6°F, respirations 14, oxygen saturation of 95%. ICP reading is 21 mmHg. Based on these findings you would:

A myelogram is an invasive diagnostic procedure used to visualize the spinal cord, nerve roots, and surrounding subarachnoid space using contrast dye injected into the spinal canal via lumbar puncture. Because of this, the preparation and positioning for a myelogram closely resemble those of a lumbar puncture, including obtaining informed consent, checking for allergies to contrast dye, and proper positioning during and after the procedure.

Rationale for Correct Answer:

A. Lumbar puncture: A myelogram requires injection of contrast dye into the subarachnoid space through a lumbar puncture. Therefore, preparation (e.g., client positioning, sterile technique, consent, allergy screening) and aftercare (e.g., monitoring for headache or CSF leak) are very similar to a standard lumbar puncture.

Rationale for Incorrect Answers:
B. MRI: MRI is a noninvasive imaging procedure that uses magnetic fields and does not involve puncturing the spinal canal or injecting contrast into the CSF unless performed with special contrast protocols.
C. Cerebral angiography: This procedure involves injection of contrast dye into cerebral arteries, typically via a femoral catheter, and does not involve accessing the spinal canal.
D. EEG: EEG is noninvasive and involves placement of electrodes on the scalp to monitor electrical activity in the brain. It does not use contrast dye or invasive techniques.

Key Takeaways:
• Myelogram preparation is most similar to a lumbar puncture due to shared technique and spinal access.
• Contrast dye is used in both procedures, requiring allergy assessment and informed consent.
• Other tests like EEG, MRI, and cerebral angiography differ significantly in terms of invasiveness and preparation.

An MRI uses strong magnetic fields and radio waves to create detailed images of the body. The most critical safety measure is ensuring the removal of all metal-containing objects, as metal can become a projectile hazard, cause burns, or interfere with image quality. This includes jewelry, hearing aids, belts, and sometimes certain implants. The nurse must prioritize metal screening above all other preparations to prevent serious injury.

Rationale for Correct Answer:
B. Removing all metal-containing objects: Metal objects pose a severe risk in the MRI suite due to the powerful magnetic field. Removing metal is the first priority for safety and must be done before entering the scanner room. This step also ensures image accuracy.

Rationale for Incorrect Answers:

A. Withholding stimulants 24 to 48 hours prior to exam: This is not necessary for most MRI procedures. It may apply to specialized tests like EEGs or cardiac stress testing but not standard MRIs.

C. Instructing the client to void prior to the MRI: While a full bladder may cause some discomfort, it is not dangerous and does not interfere with MRI function. Voiding is not the priority.

D. Initiating an IV line for administration of contrast: This may be required if the MRI is ordered with contrast, but not all MRIs require contrast. Even when needed, IV access is secondary to safety screening for metal.

Key Takeaways:
• Metal screening is the top priority before any MRI to prevent injury and ensure image quality.
• MRIs use magnetic fields, not radiation—making metal objects and implants high-risk items.
• Other preparations like voiding or IV access are important but not as critical as ensuring metal safety compliance.