Correct Answer: B

Rationale: The correct answer is B because when a client reports feeling less anxious, it suggests that the treatment for a pulmonary embolism is effective. This is a good indicator of the client's overall well-being and response to treatment. Choices A, C, and D are incorrect because a chest x-ray revealing increased density in all fields, diminished breath sounds auscultated bilaterally, and ABG results showing specific values do not directly correlate with the effectiveness of treatment for a pulmonary embolism. While these assessments are important for monitoring the client's condition, the client's subjective report of feeling less anxious provides a more direct insight into the impact of the treatment.

Correct Answer: C

Rationale: When inserting an indwelling urinary catheter for a male client, it is crucial to advance the catheter 17 to 22.5 cm after urine begins to flow. This helps ensure proper placement in the male urethra, which is longer compared to females. Choice A is incorrect as advancing only 2.5 to 5 cm would not reach the correct placement in male clients. Choice B is incorrect as advancing 7.5 to 10 cm is insufficient to reach the appropriate location in male clients. Choice D is also incorrect as advancing 5 to 7.5 cm would likely not reach the desired placement in male clients.

Correct Answer: C

Rationale: The correct instruction for a client prescribed metformin is to take the medication with meals to improve absorption and reduce gastrointestinal upset. Metformin is typically recommended to be taken with food to minimize side effects. Option A is incorrect as taking metformin on an empty stomach may increase the risk of gastrointestinal side effects. Option B is unrelated as metformin does not interact with potassium-rich foods. Option D is also incorrect as metformin does not cause drowsiness, so there is no need to take it before bed.

Correct Answer: C

Rationale: The correct answer is to use a sterile brush to clean the inner cannula. This action is crucial to prevent infection during tracheostomy care. Choice A is incorrect as clean technique is not adequate for tracheostomy care, sterile technique is required. Choice B is incorrect as tracheostomy ties should be replaced when soiled, not routinely every 24 hours. Choice D is incorrect as tracheostomy dressings should be changed more frequently to maintain cleanliness and prevent infection.

Correct Answer: C

Rationale: The correct instruction for a client prescribed lithium is to drink at least 2 liters of water each day. This is important to prevent dehydration and reduce the risk of lithium toxicity. Option A is incorrect because lithium is usually taken with food to minimize gastrointestinal side effects. Option B is unrelated to lithium and is more applicable to clients taking MAOIs. Option D is incorrect as lithium is typically taken in divided doses throughout the day to maintain therapeutic levels.