Correct Answer: C

Rationale: The correct first action the nurse should take when preparing to administer packed RBCs to a client is to verify the client's identification with another nurse. This is crucial to ensure that the correct blood product is administered to the correct client, minimizing the risk of a transfusion reaction. Administering an antihistamine prior to transfusion (Choice A) is not the first priority and is not a standard practice. While checking the client's vital signs (Choice B) is important, verifying the client's identification takes precedence to prevent a critical error. Priming the IV tubing with normal saline (Choice D) is a necessary step in the process but should occur after verifying the client's identity.

Correct Answer: B

Rationale: Bacterial vaginosis often presents with a profuse, milky white discharge and a characteristic fishy odor, without significant inflammation, hematuria, or fever. Choice A, frequency, and dysuria are more indicative of a urinary tract infection. Choice C, hematuria, is associated with conditions like urinary tract infections or kidney problems. Choice D, low-grade fever, is not a typical symptom of bacterial vaginosis.

Correct Answer: B

Rationale: Rheumatoid factor is a specific marker for rheumatoid arthritis. It is often elevated in clients with this autoimmune condition, helping to confirm the diagnosis. Erythrocyte sedimentation rate (ESR) and antinuclear antibody tests can be supportive but are not specific for rheumatoid arthritis. Serum calcium levels are not typically used to confirm this diagnosis.

Correct Answer: B

Rationale: The correct answer is to instruct the client to chew sugarless gum. Chewing sugarless gum can help alleviate dry mouth by stimulating saliva production, which is a common side effect of many antidepressants. Decreasing fluid intake (choice A) is not recommended as it can worsen dry mouth. Avoiding mouthwash (choice C) is not as effective as chewing gum in stimulating saliva. Increasing intake of dairy products (choice D) is not directly related to managing dry mouth caused by antidepressants.

Correct Answer: D

Rationale: The vastus lateralis is the preferred site for IM injections in infants under 1 year of age because it is well developed and easily accessible compared to other muscle groups. The ventrogluteal and deltoid sites are not typically used for infants due to muscle development and size. The dorsogluteal site is not recommended for infants or young children due to its proximity to major nerves and blood vessels.