which of the following is the most common cause of acute renal failure which of the following is the most common cause of acute renal failure
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Kaplan NCLEX Question of The Day

1. What is the most common cause of acute renal failure?

Correct answer: Shock

Rationale: The most common cause of acute renal failure is shock. In cases of shock, such as hypovolemic shock where there is low blood volume, the kidneys receive inadequate blood flow leading to acute renal failure. This can result in the kidneys starting to die within 20 minutes of low pressure. While nephrotoxic drugs can also cause acute renal failure, shock is more commonly associated with this condition. An enlarged prostate can lead to urinary retention but is not the most common cause of acute renal failure. Diabetes, on the other hand, can cause chronic kidney disease over time but is not typically the primary cause of acute renal failure.

2. A nurse reviewing the physical assessment findings in a client’s health care record notes documentation that the Phalen test caused numbness and burning. Which disorder does the nurse, on the basis of this finding, conclude that the client has?

Correct answer: Carpal tunnel syndrome

Rationale: The Phalen test is specifically used to assess for carpal tunnel syndrome. In this test, the client is asked to hold their hands back to back while flexing the wrists 90 degrees, which can reproduce the numbness and burning sensation experienced by individuals with carpal tunnel syndrome. Scoliosis is a condition characterized by abnormal lateral curvature of the spine, not related to the Phalen test. Bone deformity is a general term that does not specifically relate to the symptoms described. Heberden nodules are bony swellings that occur in osteoarthritis and are not assessed through the Phalen test.

3. An LPN is talking with a client scheduled to undergo a vasectomy in the next few minutes. He states, “I know I signed the form and all, but I’m not feeling so sure of this. It can be reversed pretty easily, right?” What is the LPN’s best response?

Correct answer: “It sounds like you have a few more questions you’d like answered. Let me grab the doctor quickly so he can answer them for you.”

Rationale: The best response for the LPN is to acknowledge the client's concerns and offer to provide more information. By offering to get the doctor to answer any additional questions, the LPN shows respect for the client's right to informed consent. Option A provides some information but dismisses the client's uncertainty and implies they won't regret the decision, which may not be the case. Option B acknowledges nervousness but doesn't directly address the client's request for more information. Option D attempts to reassure the client but fails to address the need for additional questions to be answered by the doctor.

4. A nurse is teaching a client newly diagnosed with Emphysema about the disease process. Which of the following statements best explains the problems associated with emphysema and could be adapted for use in the nurse’s discussion with the client?

Correct answer: Larger than normal air spaces and loss of elastic recoil cause air to be trapped in the lung and collapse airways.

Rationale: The correct answer is: 'Larger than normal air spaces and loss of elastic recoil cause air to be trapped in the lung and collapse airways.' Emphysema is a breakdown of the elastin and fiber network of the alveoli where the alveoli enlarge or the walls are destroyed. This alveolar destruction leads to the formation of larger-than-normal air spaces. Emphysema is one of a group of pulmonary diseases of a chronic nature characterized by increased resistance to airflow; the entity is part of chronic obstructive pulmonary disease (COPD). Choice A is incorrect because emphysema is not primarily characterized by hyperactivity of the medium-sized bronchi causing wheezing and tightness in the chest. Choice C is incorrect because vasodilation, congestion, and mucosal edema are not the primary mechanisms involved in emphysema, and they do not directly lead to chronic cough and sputum production. Choice D is incorrect because emphysema is not related to chloride transport issues and thick viscous mucus production.

5. A nurse sees documentation in the client’s record indicating that the health care provider has noted the presence of adventitious breath sounds. The nurse knows that these types of sounds have which aspect?

Correct answer: Abnormal sounds that should not be heard in the lungs

Rationale: Adventitious breath sounds are abnormal sounds that are not normally heard in the lungs. These sounds are added sounds superimposed on the breath sounds. They are caused by air colliding with secretions in the tracheobronchial passageways or when previously deflated airways pop open. Hollow sounds heard over the trachea and larynx are normal bronchial (tracheal) breath sounds, not adventitious. Rustling sounds heard over the peripheral lung fields are normal vesicular breath sounds, not adventitious. Therefore, the correct answer is that adventitious breath sounds are abnormal sounds that should not be heard in the lungs.

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