Patient Care, Safety, Pharmacology, and Professional Standards
Domain 4 tests safe patient care, medication handling, infection control, emergency response, and professional conduct. The exam expects you to protect patients from falls, exposure, medication errors, and preventable systemic effects while working within your scope.
Infection control and safety
- Perform hand hygiene before and after patient contact and use personal protective equipment according to standard precautions.
- Match reprocessing to the item: critical items require sterilization, semicritical items such as tonometer prisms require high-level disinfection or single-use tips, and noncritical surfaces require low-level disinfection.
- Prevent falls by stabilizing chairs, keeping cords clear, and assisting patients with mobility or vision limitations.
- Keep emergency supplies available and know the response to syncope: lie the patient flat, elevate the legs, check vital signs, and call for help.
Pharmacology
- Topical anesthetics such as proparacaine are for office procedures, not home dispensing. They cause transient stinging and corneal anesthesia.
- Mydriatics include phenylephrine and tropicamide; cycloplegics include cyclopentolate, homatropine, and atropine. Warn about blur, photophobia, and driving restrictions.
- Common glaucoma classes are beta-blockers such as timolol, prostaglandins such as latanoprost, alpha agonists such as brimonidine, carbonic anhydrase inhibitors such as dorzolamide, and cholinergics such as pilocarpine.
- Do not touch the dropper tip to the eye or lashes. Wait about 5 minutes between different drops and use punctal occlusion for 1 to 2 minutes to reduce systemic absorption.
- Check allergies, pregnancy status, and history of asthma or heart block before instilling beta-blockers.
Professional standards
- Obtain informed consent, protect privacy under HIPAA, document accurately, and report adverse events. Stay within the defined scope of practice and refer questions of diagnosis to the physician.
Worked example
A patient uses timolol and dorzolamide. You instruct punctal occlusion for 1 to 2 minutes after each drop because closing the drainage pathway reduces nasolacrimal absorption and limits systemic beta-blockade, which could cause bradycardia or bronchospasm. You also separate the two medications by about 5 minutes so the second drop is not washed out. This reasoning combines drug class, adverse-effect risk, and administration technique.
Traps that cost marks
- Touching the dropper tip to the ocular surface and contaminating the bottle.
- Failing to shake a suspension medication before instillation.
- Omitting allergy history before giving a beta-blocker or antibiotic.
- Using a disinfectant wipe on a tonometer prism that requires high-level disinfection.