A nurse is evaluating the allergy profile of a client who has Graves' disease and is to undergo a thyroid scan. The nurse should identify which of the following allergies as a contraindication for the client to undergo a thyroid scan?

A. The examination light of the ophthalmoscope should be directed toward the client's eye, not the client's face.

B. When examining the left eye, the nurse should stand on the right side of the client to facilitate proper alignment of the ophthalmoscope with the client's eye.

C. Dimming the lights in the room may improve visualization of the client's internal eye

structures, but it is not typically necessary for ophthalmoscopic examination and may hinder the nurse's ability to assess the client effectively.

D. Placing the ophthalmoscope directly against the client's forehead would not facilitate proper examination of the internal eye structures and may cause discomfort to the client.

A. Using the injection port farthest from the IV catheter insertion site is not necessary for administering an IV bolus of medication and may not be practical depending on the setup of the IV tubing.

B. Occluding the IV tubing above the injection port prevents the bolus medication from flowing into the continuous IV infusion, ensuring that the medication is delivered directly to the patient.

C. Checking for blood return after medication administration is not relevant in this context, as albumin 5% is administered intravenously and does not require blood return.

D. Flushing the IV tubing with a heparinized solution is not necessary for administering an IV bolus of medication and may not be appropriate for all medications.