Correct Answer: C

Rationale: The correct answer is C: fluid volume deficit. In diabetes insipidus, there is an excessive amount of dilute urine excreted, leading to dehydration and fluid volume deficit. The posterior pituitary tumor causes a deficiency in antidiuretic hormone (ADH), which regulates water reabsorption in the kidneys. As a result, the client experiences polyuria and polydipsia, leading to fluid volume deficit. Choices A, B, and D are incorrect because diabetes insipidus does not cause fluid volume excess, incontinence, or diarrhea. The key is to recognize the pathophysiology of diabetes insipidus and its impact on fluid balance.

Correct Answer: C

Rationale: The correct answer is C: 5 years. In ALS, 50% of patients have a life expectancy of around 3-5 years from the time of diagnosis. This is due to the progressive nature of the disease, leading to rapid deterioration of motor neurons and muscle function. Choice A (3 years) is too specific and may not apply to exactly 50% of patients. Choice B (10 years) and D (20 years) are too optimistic and do not align with the typical prognosis of ALS, where the majority of patients have a shorter life expectancy. Therefore, based on the average survival rates and disease progression, choice C is the most accurate representation of the normal life expectancy for 50% of ALS patients.

Correct Answer: D

Rationale: The correct answer is D: Pallor, tachycardia, and a sore tongue. Pernicious anemia is caused by a deficiency in vitamin B12, leading to symptoms such as pallor (due to decreased red blood cells), tachycardia (as the heart works harder to compensate for decreased oxygen-carrying capacity of the blood), and a sore tongue (due to inflammation of the tongue). Choice A is incorrect because bradycardia would not be expected in pernicious anemia, and reduced pulse is not a typical finding. Choice B is incorrect because weight gain is not a common symptom of pernicious anemia. Choice C is incorrect because angina and double vision are not typical findings of pernicious anemia, and anorexia is more likely due to other causes.

Correct Answer: A

Rationale: The correct answer is A: axilla. When using crutches, weight should primarily be supported on the axilla to prevent nerve and blood vessel damage in the armpit area. Supporting weight on the upper arms (B) can lead to nerve compression and muscle strain. Supporting weight on the elbows (C) can cause nerve damage and discomfort. Supporting weight on the hands (D) can lead to hand and wrist pain and may not provide stable support. Therefore, the axilla is the most appropriate area to support weight while using crutches to ensure safety and comfort for the client.

Correct Answer: B

Rationale: The correct answer is B: Focus on the patient's presenting situation. In the problem-oriented approach, the nurse starts by identifying the patient's main issue or reason for seeking care. This step helps prioritize data collection and guides further assessment and intervention. By focusing on the presenting situation, the nurse can gather relevant information efficiently and address the immediate concern. Incorrect choices: A: Completing questions in chronological order may not be the most effective approach as it does not prioritize the patient's current problem. C: Making accurate interpretations of data comes after data collection and analysis, not as the first step. D: Conducting an observational overview is important, but it should come after focusing on the patient's presenting situation to gather targeted data.