Nokea
What is the priority intervention for a patient with unstable angina?
- A. Administer nitroglycerin
- B. Establish IV access
- C. Auscultate heart sounds
- D. Administer aspirin
Correct Answer: A
Rationale: The correct answer is to administer nitroglycerin. Nitroglycerin is the priority intervention for a patient with unstable angina as it helps dilate blood vessels, improve blood flow to the heart, relieve chest pain, and prevent further cardiac damage. Establishing IV access (choice B) may be important but is not the priority over administering nitroglycerin in this scenario. Auscultating heart sounds (choice C) and administering aspirin (choice D) are also important aspects of managing unstable angina, but they are not the immediate priority intervention when a patient is experiencing chest pain.
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What does continuous bubbling in the water seal chamber of a chest tube indicate?
- A. An air leak
- B. A blocked chest tube
- C. Normal chest tube function
- D. Continuous drainage from the chest tube
Correct Answer: A
Rationale: Continuous bubbling in the water seal chamber of a chest tube indicates an air leak in the system. This occurs when air is entering the system through a leak, preventing the lung from fully re-expanding. Choice B, a blocked chest tube, is incorrect as a blocked tube would result in a lack of drainage rather than continuous bubbling. Choice C, normal chest tube function, is incorrect as continuous bubbling signifies an issue. Choice D, continuous drainage from the chest tube, is incorrect as bubbling in the water seal chamber specifically indicates an air leak, not just the presence of drainage.
What are the expected changes on an ECG for a patient with hypokalemia?
- A. Flattened T waves
- B. Prominent U waves
- C. ST elevation
- D. Wide QRS complexes
Correct Answer: A
Rationale: Flattened T waves are an early sign of hypokalemia on an ECG. Hypokalemia primarily manifests as flattened T waves on an ECG. While prominent U waves can be seen in hypokalemia, they are not as specific as flattened T waves. ST elevation is more commonly associated with conditions like myocardial infarction rather than hypokalemia. Wide QRS complexes are typically not a feature of hypokalemia on an ECG.
What ECG changes are seen with hyperkalemia?
- A. Flattened T waves
- B. Elevated ST segments
- C. Prominent U waves
- D. Widened QRS complex
Correct Answer: A
Rationale: Flattened T waves are an early ECG sign of hyperkalemia. Hyperkalemia affects the repolarization phase of the cardiac action potential, leading to changes such as peaked T waves, prolonged PR interval, widened QRS complex, and ultimately sine wave pattern. Elevated ST segments, prominent U waves, and widened QRS complex are not typically associated with hyperkalemia, making choices B, C, and D incorrect.
What is the priority action for a patient with chest pain from acute coronary syndrome?
- A. Administer sublingual nitroglycerin
- B. Check the patient's cardiac enzymes
- C. Administer aspirin
- D. Obtain IV access
Correct Answer: A
Rationale: The correct answer is to administer sublingual nitroglycerin. This medication helps dilate the blood vessels, reducing the workload of the heart and improving blood flow to the heart muscle, which is crucial in the management of acute coronary syndrome. Checking cardiac enzymes (choice B) is important for diagnosing a heart attack but is not the priority over providing immediate relief to the patient's chest pain. Administering aspirin (choice C) is also important in acute coronary syndrome to prevent further clot formation, but it is not the priority action for immediate pain relief. Obtaining IV access (choice D) is necessary for administering medications or fluids; however, in this scenario, providing sublingual nitroglycerin for prompt pain relief takes precedence.
What intervention is needed for continuous bubbling in the chest tube water seal chamber?
- A. Tighten the connections of the chest tube system
- B. Clamp the chest tube
- C. Replace the chest tube system
- D. Continue monitoring the chest tube
Correct Answer: A
Rationale: The correct intervention for continuous bubbling in the chest tube water seal chamber is to tighten the connections of the chest tube system. Continuous bubbling indicates an air leak in the system, and tightening the connections can help resolve this issue. Clamping the chest tube (Choice B) is not appropriate and can lead to complications by obstructing the drainage system. Similarly, replacing the entire chest tube system (Choice C) may not be necessary if the issue can be resolved by tightening the connections. Continuing to monitor the chest tube (Choice D) without taking action to address the continuous bubbling may delay necessary interventions to prevent complications.