A nurse is preparing a client for fluorescein angiography to evaluate retinal blood vessels. Which instruction should the nurse provide to the client?

Fluorescein angiography causes temporary photosensitivity and pupil dilation, making bright lights uncomfortable for hours after the procedure. Sunglasses are needed post-procedure to reduce discomfort and protect the eyes. Other options are not standard pre-procedure instructions.

Core Nursing Explanation Key Concept Analysis: This question assesses your knowledge of patient preparation and post-procedure care for a Fluorescein Angiography. This is a diagnostic test where a fluorescent dye (fluorescein sodium) is injected intravenously (IV) to visualize the blood vessels in the retina. The core nursing considerations revolve around the dye's mechanism and its expected side effects.

Answer Rationale: Key Point! The correct instruction is to bring sunglasses to wear after the procedure. This is because the injected fluorescein dye causes temporary photosensitivity (increased sensitivity to light). Furthermore, mydriatic eye drops (pupil dilators) are administered before the test to allow for better visualization of the retina. Dilated pupils let in more light, which, combined with the dye-induced photosensitivity, can cause significant glare and discomfort for several hours after the procedure. Providing sunglasses is a key nursing intervention for patient comfort and safety.

Distractor Analysis:
Watch out for confusion! Option ①: "Remove all jewelry and metal objects" is a standard instruction for procedures involving strong magnetic fields (like MRI) or radiation (like X-ray). Fluorescein angiography uses a special camera and fluorescent dye, not modalities that require removal of all metal.
Option ②: "Fast for 12 hours prior" is not typically required. While patients might be advised to have a light meal to prevent nausea, prolonged fasting is not standard. The critical instruction is often to avoid substances that dilate or constrict blood vessels (like caffeine) before the test.
Option ③: "Wear sunglasses during the procedure" is incorrect. During the angiography, the patient's head is positioned in a machine, and their eyes must be open and focused. Sunglasses would obstruct the imaging. Eye protection is needed *after* the test.

Related Concepts: Understanding this procedure connects to knowledge of other dye-based tests (e.g., precautions for iodine-based contrast). It also highlights the importance of patient education regarding expected side effects like temporary yellow discoloration of skin and urine from the dye, which is normal and resolves within 24-48 hours.
Concept Summary

Concept	Key Points
Fluorescein Angiography Purpose	Evaluates retinal circulation. Diagnoses conditions like diabetic retinopathy, macular degeneration, and retinal vessel occlusions.
Mechanism	IV injection of fluorescein dye. A special camera takes rapid-sequence photos as dye flows through retinal vessels.
Key Pre-procedure Nursing Action	Administer mydriatic eye drops to dilate pupils. Assess for iodine/shellfish allergy (though dye is different, allergy screening is common).
Key Post-procedure Nursing Action	Instruct patient to wear sunglasses due to photosensitivity and pupil dilation. Inform about temporary yellow skin/urine.
Potential Adverse Reaction	Nausea, vomiting, hypersensitivity reaction (hives, anaphylaxis). Emergency equipment (epinephrine) must be available.

Side-by-Side Comparison!

Diagnostic Eye Test	Key Preparation/Instruction	Rationale
Fluorescein Angiography	Bring/wear sunglasses AFTER the procedure.	Dye causes photosensitivity; pupils are dilated.
Tonometry (Glaucoma test)	Remove contact lenses. Avoid caffeine if instructed.	Measures intraocular pressure (IOP). Caffeine can temporarily increase IOP.
Visual Field Test	No special preparation needed.	Measures peripheral vision. Patient responds to light stimuli.

Anatomy, Physiology & Pharmacology Points

• Anatomy: The test visualizes the retinal arteries and veins and the choroid (vascular layer behind the retina).
• Physiology: The dye binds to plasma proteins and circulates. Leakage or blockage of dye in the photos helps identify areas of ischemia, edema, or neovascularization (abnormal new blood vessel growth).
• Pharmacology: Mydriatic agents like tropicamide or phenylephrine are used pre-procedure. They work by paralyzing the iris sphincter muscle (parasympathetic blockade) or stimulating the iris dilator muscle (sympathetic stimulation).

Memory Tips

• FLUOrescein = FLUOrescent = Follows Light, Use Outside (sunglasses): Associate the name with light sensitivity needing outdoor eye protection.
• Think "After-Glow": The dye makes things glow, and your eyes will be sensitive to light AFTER the glow is captured.

High-Frequency NCLEX Topics Patient education for diagnostic tests is a classic NCLEX topic. Focus on the "why" behind instructions. For this test, the NCLEX wants you to know: 1) The purpose (retinal vessels), 2) The major side effect of the dye (photosensitivity/yellow discoloration), and 3) The priority post-procedure intervention (eye protection/comfort).
Watch Out for Question Variations!

• Instead of asking for patient instruction, it might ask: "A client is recovering from fluorescein angiography. Which client statement indicates a need for further teaching?" An incorrect statement would be: "I can't wait to go sit in the sunny garden without my hat."
• The question could focus on allergy assessment: "Prior to fluorescein angiography, it is most important for the nurse to assess the client for a history of allergy to...?" While fluorescein itself is not iodine-based, assessing for any dye/contrast or severe allergy history is crucial.
• It could be combined with diabetic care: "The nurse is teaching a client with diabetes about annual screening tests. Which test requires the client to bring sunglasses?" Linking the procedure to its common indication (diabetic retinopathy screening).

Nursing Clinical Practice Guide Clinical Scenario: Mr. Johnson, a 68-year-old with type 2 diabetes, is scheduled for a fluorescein angiography to evaluate possible diabetic retinopathy. He arrives at the outpatient ophthalmology clinic.

Nursing Intervention Strategy:

1. Assessment: Verify the order and obtain informed consent. Assess for allergies (especially previous reactions to dyes, iodine, or shellfish as a general precaution), current medications, and pregnancy status. Check vital signs.
2. Pre-procedure Care: Instill prescribed mydriatic eye drops as ordered, allowing time for full pupil dilation. Explain the procedure: "You will feel a quick pinch from the IV needle. The dye will be injected, and you'll see bright flashes of light as the camera takes pictures. You may feel temporarily nauseated or have a metallic taste."
3. Procedure Support: Ensure IV access is established. Position the patient comfortably with chin and forehead against the machine support. Instruct them to keep their eyes open and focused as directed.
4. Post-procedure Care & Education: This is the critical phase. Remove the IV and apply pressure. Provide the key instruction: "Your pupils will remain dilated and your eyes will be very sensitive to light for several hours. You must wear these sunglasses when you leave. Have someone drive you home." Also educate: "Your skin and urine may look yellowish-orange for 24-48 hours. This is normal as your body eliminates the dye. Drink plenty of fluids to help flush it out."
5. Evaluation: Ensure the patient verbalizes understanding of post-procedure precautions. Monitor for any signs of delayed allergic reaction (itching, rash, difficulty breathing) before discharge.

Patient Safety and Precautions:

• Contraindications/Precautions: Use caution in patients with severe renal impairment (dye is excreted renally). Pregnancy is a relative contraindication.
• Medication Cautions: The mydriatic drops can cause blurred vision and sensitivity to light. They may also precipitate acute angle-closure glaucoma in susceptible individuals. Screen for a history of narrow-angle glaucoma.
• Key Monitoring Points: Monitor for immediate adverse reactions during and right after dye injection: nausea, vomiting, hives, bronchospasm, or anaphylaxis. Have emergency equipment (epinephrine, antihistamines, oxygen) readily available.

Nursing Procedure & Medication Flow Pre-Procedure Eye Drop Administration:

1. Wash hands and don gloves.
2. Check the "Rights" of medication administration for the mydriatic drops.
3. Have the patient tilt head back. Gently pull down lower eyelid to form a pouch.
4. Instill the prescribed number of drops into the conjunctival sac, avoiding direct contact with the cornea.
5. Instruct patient to gently close eyes (not squeeze) and apply gentle pressure to the nasolacrimal duct (inner corner of eye) for 1-2 minutes to minimize systemic absorption.
6. Wait 15-30 minutes for full dilation before proceeding.

IV Dye Injection:

• The dye is injected as a rapid IV bolus, typically into a large antecubital vein.
• Observe the IV site for infiltration, as the dye can cause severe tissue irritation if it extravasates.

A Word from Your Senior Nurse "Eye procedures can be anxiety-provoking for patients. They're in a dark room, their vision is blurry from the drops, and they're worried about the injection. Your calm, clear explanations are their anchor. Remembering the simple yet crucial detail about sunglasses isn't just about following a protocol—it's about anticipatory care. You're preventing the distress of walking out into bright sunlight with dilated pupils. This kind of thoughtful, holistic teaching is what makes patients trust you and feel truly cared for. On the NCLEX, they're testing if you see the patient as a whole person, not just a procedure."