Nursing Elites

1. What is the primary role of the sinoatrial (SA) node in the heart?

• A. Pacemaker of the heart
• B. Blood pressure regulation
• C. Electrical conduction delay
• D. Stimulating muscle contraction

Correct answer: A

Rationale: The correct answer is A: Pacemaker of the heart. The SA node, known as the natural pacemaker, initiates the electrical impulses that set the rhythm for the heartbeat. It is responsible for coordinating the heart's contractions by generating electrical signals at regular intervals. Choice B is incorrect as the SA node's primary function is not related to blood pressure regulation. Choice C is incorrect as the SA node does not cause electrical conduction delay but rather initiates and conducts the electrical impulses. Choice D is incorrect as the SA node does not directly stimulate muscle contraction but rather initiates the electrical events that lead to muscle contraction.

2. An adult female client with type 1 diabetes mellitus is receiving NPH insulin 35 units in the morning. Which finding should the PN document as evidence that the amount of insulin is inadequate?

• A. States that her feet are constantly cold and feel numb
• B. A wound on the ankle that starts to drain and becomes painful
• C. Consecutive evening serum glucose greater than 260 mg/dL
• D. Reports nausea in the morning but can still eat breakfast

Correct answer: C

Rationale: The correct answer is C. High evening glucose levels indicate that the morning dose of NPH insulin may be insufficient to control blood sugar throughout the day. Choice A is incorrect as cold and numb feet are more indicative of a circulation issue rather than an insulin inadequacy. Choice B suggests a wound infection rather than inadequate insulin. Choice D, nausea in the morning, may be due to other causes and does not necessarily indicate inadequate insulin dosage.

3. Which of the following is the best method for confirming nasogastric tube placement?

• A. Auscultating over the stomach while injecting air
• B. Checking the pH of the aspirate
• C. Observing the patient’s response during feeding
• D. Measuring the external length of the tube

Correct answer: B

Rationale: Checking the pH of the aspirate is the most reliable method to confirm nasogastric tube placement as it provides direct evidence of the tube's location in the stomach. When the pH is acidic (pH < 5), it indicates that the tube is correctly placed in the stomach. Auscultating over the stomach while injecting air may not always be accurate, as the sound can be misleading due to various factors. Observing the patient’s response during feeding is not a definitive method for confirming tube placement, as it can be influenced by other factors. Measuring the external length of the tube does not ensure correct placement within the GI tract and can be affected by external factors like patient anatomy.

4. A client presents to the office with complaints of swelling in the legs, chills, and shortness of breath. During auscultation of the chest, a heart murmur is heard. The client's blood culture reveals a microorganism in the blood. When a microorganism is found in the blood, this condition is called

• A. Bacteremia
• B. Sepsis
• C. Septicemia
• D. Parasitic infection

Correct answer: A

Rationale: When a microorganism is found in the blood, this condition is called bacteremia, which refers to the presence of bacteria in the bloodstream, as indicated by a positive blood culture. If not appropriately treated, bacteremia can progress to septicemia, also known as sepsis. Sepsis is a severe and life-threatening response to an infection, characterized by systemic inflammation and organ dysfunction. Parasitic infections involve pathogens other than bacteria and are not directly related to the scenario described.

5. The nurse is teaching a pregnant client how to distinguish prelabor contractions from true labor contractions. Which statement about prelabor contractions is accurate?

• A. They are irregular
• B. They are usually felt in the abdomen
• C. They start in the back and radiate to the abdomen
• D. They become more intense during walking

Correct answer: B

Rationale: The correct statement about prelabor contractions (Braxton Hicks contractions) is that they are usually felt in the abdomen. They are irregular in nature and do not intensify with movement. Choice A is incorrect because prelabor contractions are irregular, not regular. Choice C is incorrect as prelabor contractions do not start in the back and radiate to the abdomen. Choice D is incorrect as prelabor contractions do not become more intense during walking.

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