Nokea
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.
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A client who had an abdominal hysterectomy is experiencing minimal urine output despite adequate fluid intake. What should the nurse assess first?
- A. The client's bladder for distension.
- B. The IV catheter insertion site.
- C. The patency of the urinary catheter.
- D. The client's vital signs.
Correct Answer: C
Rationale: Assessing the patency of the urinary catheter is crucial in this situation. A blocked catheter could be a common cause of decreased urine output following surgery. While checking the IV catheter insertion site (Choice B) is important, it is not the priority in this case. Examining the client's bladder for distension (Choice A) is relevant, but assessing the patency of the catheter takes precedence in resolving the issue of decreased urine output. Monitoring vital signs (Choice D) is a routine nursing task but not the priority when dealing with decreased urine output post-surgery.
What is the primary action a healthcare professional should take when a patient with a suspected myocardial infarction (MI) arrives in the emergency department?
- A. Apply a cold compress to the chest
- B. Administer oxygen and obtain an electrocardiogram (ECG)
- C. Encourage the patient to walk to reduce anxiety
- D. Provide a high-carbohydrate meal
Correct Answer: B
Rationale: Administering oxygen and obtaining an ECG are crucial initial steps when managing a suspected myocardial infarction (MI). Oxygen helps improve oxygenation to the heart muscle, while an ECG is essential to diagnose an MI promptly. Applying a cold compress, encouraging the patient to walk, or providing a high-carbohydrate meal are not appropriate actions in the initial management of a suspected MI. Applying a cold compress can delay necessary interventions, encouraging the patient to walk may worsen the condition, and providing a high-carbohydrate meal is irrelevant to the immediate needs of a patient with a suspected MI.
The nurse is assigned to administer medications in a long-term care facility. A disoriented resident has no identification band or picture. What is the best nursing action for the nurse to take prior to administering the medications to this resident?
- A. Ask a regular staff member to confirm the resident's identity
- B. Hold the medication until a family member can confirm identity
- C. Re-orient the resident to name, place, and situation
- D. Confirm the room and bed numbers with those on the medication record
Correct Answer: A
Rationale: In a long-term care facility, when a disoriented resident lacks identification, it is crucial to confirm the resident's identity before administering medication to prevent errors. Asking a regular staff member who is familiar with the resident to confirm their identity is the best course of action. This ensures accuracy and safety in medication administration. Holding the medication until a family member can confirm the identity could delay necessary treatment. Re-orienting the resident is important for their well-being but does not address the immediate medication safety concern. Confirming room and bed numbers, though important for administration logistics, does not verify the resident's identity.
During a clinic visit for a sore throat, a client's basal metabolic panel reveals a serum potassium of 3.0 mEq/L. Which intervention should the PN recommend to the client based on this finding?
- A. Increase intake of dried peaches and apricots
- B. Reduce intake of red meats
- C. Encourage use of a soft toothbrush
- D. Force fluid intake to 1500 mL daily
Correct Answer: A
Rationale: The correct answer is to recommend increasing the intake of dried peaches and apricots. A serum potassium level of 3.0 mEq/L is considered low. Increasing the intake of potassium-rich foods can help raise the serum potassium level, preventing complications such as muscle weakness and cardiac arrhythmias. Choice B, reducing intake of red meats, is incorrect because red meats are not specifically related to potassium levels. Choice C, encouraging the use of a soft toothbrush, is unrelated to addressing low potassium levels. Choice D, forcing fluid intake to 1500 mL daily, is not the appropriate intervention for low serum potassium; instead, increasing potassium-rich foods is more beneficial.
The nurse observes a UAP performing oral hygiene on an unconscious client who is lying in a flat side-lying position with an emesis basin on a towel under the chin. Which action should the nurse take?
- A. Stop the procedure and tell the UAP to place the client in a Fowler's position
- B. Praise the UAP for doing the oral hygiene but encourage family participation
- C. Tell the UAP to continue because the unconscious client is positioned safely
- D. Enroll the UAP in a hospital education class on conducting safe client care
Correct Answer: C
Rationale: The correct answer is to tell the UAP to continue because the unconscious client is positioned safely for oral care. Placing an unconscious client in a side-lying position helps prevent aspiration, and having an emesis basin under the chin is appropriate to catch any fluids. Therefore, the nurse should acknowledge that the UAP is performing the procedure correctly. Choices A, B, and D are incorrect. Placing the client in a Fowler's position is not necessary for this procedure as the client is already positioned safely. Praise and encouragement for family participation are important aspects but not the immediate action needed in this scenario. Enrolling the UAP in a hospital education class is not warranted as the current procedure is being performed correctly.