Correct Answer: A

Rationale: A person whose vision is measured at 20/40 can see an object from 40 feet away that a person with 20/20 vision can see from 20 feet away. In this measurement system, the first number represents how far away the person is from the eye chart (the testing distance), and the second number indicates how far away a person with normal vision can be from the chart to see the same line of letters or objects. Therefore, if someone has 20/40 vision, it means they need to be at 20 feet to see what a person with 20/20 vision can see at 40 feet.

Correct Answer: D

Rationale: When caring for a patient receiving total parenteral nutrition (TPN), it is crucial to maintain strict aseptic technique to prevent infection. Wearing a sterile mask when changing the central venous catheter dressing helps to reduce the risk of introducing pathogens into the catheter site, which can lead to serious bloodstream infections. It is essential to use sterile gloves, a sterile mask, and to assess the insertion site for any signs or symptoms of infection during central venous catheter dressing changes. Additionally, to prevent infection, TPN infusion tubing should be changed every 24 hours, and no single container of TPN should be hung for longer than 24 hours, with lipids not running for longer than 12 hours.

Correct Answer: D

Rationale: Recurrent episodes of acute otitis media (AOM) can cause fluid accumulation in the middle ear, leading to hearing loss and increased risk of further infections. Insertion of a ventilation tube, also known as a tympanostomy tube, is a common intervention for children with recurrent AOM. This procedure involves placing a tiny tube through the eardrum to allow ventilation and drainage of fluid from the middle ear. Ventilation tubes help equalize pressure, prevent fluid buildup, and reduce the frequency of ear infections. It can improve hearing and decrease the likelihood of future episodes of AOM. Ossiculoplasty, insertion of a cochlear implant, and stapedectomy are not indicated for recurrent AOM.

Correct Answer: C

Rationale: The most appropriate action for the home health nurse to take in this situation where a patient reports distortions when looking at an Amsler grid is to arrange for the patient to be assessed for macular degeneration. Distortions in straight lines on an Amsler grid are a common early symptom of macular degeneration, a progressive eye condition that affects central vision. Macular degeneration is a leading cause of vision loss in older adults, making assessment and early intervention crucial in preserving vision. It is important for the nurse to take the patient's symptoms seriously and facilitate timely evaluation and management to prevent further vision loss. This would involve referring the patient to an ophthalmologist or an eye care specialist for a comprehensive evaluation and appropriate treatment.

Correct Answer: D

Rationale: Nucleoside reverse transcriptase inhibitors (NRTIs) are a class of antiretroviral medications typically recommended to be taken without regard to meals. This means that these medications can be taken with or without food. It is important to follow the specific instructions provided by the healthcare provider regarding the timing of medication administration. Taking NRTIs without regard to meals helps ensure consistent absorption of the medication and can help maintain steady drug levels in the body. There are no specific dietary restrictions associated with NRTIs in terms of meal timing or composition.