Critical Care Nursing NCLEX Questions

Correct Answer: A

Rationale: The presence of protein in the glomerular filtrate indicates a problem with renal function because in healthy kidneys, proteins are retained in the blood and not filtered into the urine. If protein is found in the filtrate, it suggests damage to the glomerular filtration barrier. Sodium, creatinine, and red blood cells are normally present in the filtrate and are not indicative of renal dysfunction. Sodium is freely filtered and reabsorbed, creatinine is a waste product of muscle metabolism excreted by the kidneys, and a small number of red blood cells may be filtered due to their small size. Therefore, protein in the glomerular filtrate is the most specific indicator of renal dysfunction.

Correct Answer: B

Rationale: The correct answer is B: �This injection is being given to prevent blood clots from forming.� Enoxaparin is an anticoagulant used to prevent blood clots. It is administered through injection, not orally (A). Enoxaparin does not dissolve existing blood clots (C). Contacting the primary care provider to discuss the medication is not necessary in this scenario (D). The correct choice emphasizes the purpose of enoxaparin in preventing new blood clots.

Correct Answer: A

Rationale: The correct answer is A because pain and anxiety trigger the sympathetic nervous system's fight-or-flight response, increasing heart rate, blood pressure, and stress hormones to prepare the body for potential danger. This physiological response helps the individual respond to perceived threats. Choices B, C, and D are incorrect because pain and anxiety typically increase stress levels, do not necessarily remove one from harm, and can hinder rather than enhance performance due to distraction and decreased focus.

Correct Answer: B

Rationale: The correct answer is B: Hypoventilation. A PaCO2 of 48 mm Hg indicates an elevated level of carbon dioxide in the blood, which is typically seen in hypoventilation where the lungs are not effectively removing CO2. Hypoventilation leads to respiratory acidosis. Option A is incorrect because hyperventilation would decrease PaCO2 levels. Option C is incorrect as it does not directly relate to PaCO2 levels. Option D is incorrect as increased excretion of HCO3- would not directly affect PaCO2 levels.

Correct Answer: B

Rationale: The correct answer is B: She is in the exhaustion stage of the general adaptation syndrome to stress. Rationale: 1. In the exhaustion stage, the body's resources are depleted due to prolonged stress, leading to fatigue and reduced ability to cope. 2. The elderly woman is likely experiencing high levels of stress due to her granddaughter's critical condition. 3. Managing toddlers while dealing with the emotional distress of a loved one in the ICU can be overwhelming, causing exhaustion. 4. This explanation aligns with the symptoms of fatigue and difficulty managing the children observed by the nurse. Summary: A: Incorrect. Senility is a cognitive condition unrelated to the stress of the situation. C: Incorrect. Assuming a caregiver role can be stressful, but it does not explain the observed exhaustion. D: Incorrect. Macular degeneration affects vision, not the ability to manage stress and children.