what ecg changes are expected in hypokalemia

ATI RN

ATI Capstone Adult Medical Surgical Assessment 2

1. What ECG changes are expected in hypokalemia?

A. Flattened T waves on ECG
B. Prominent U waves on ECG
C. Widened QRS complexes on ECG
D. ST elevation on ECG

Correct answer: A

Rationale: In hypokalemia, flattened T waves are a common ECG finding due to the decreased extracellular potassium affecting repolarization. Prominent U waves are typically seen in hypokalemia as well, but flattened T waves are the more specific and early ECG change. Widened QRS complexes are associated with hyperkalemia, not hypokalemia. ST elevation is often seen in conditions like myocardial infarction, pericarditis, or early repolarization syndrome, not specifically in hypokalemia.

2. What are the signs and symptoms of compartment syndrome?

A. Unrelieved pain, pallor, and pulselessness
B. Localized redness and swelling
C. Fever and infection
D. Loss of sensation in the affected area

Correct answer: A

Rationale: The signs and symptoms of compartment syndrome include unrelieved pain, pallor, and pulselessness. Unrelieved pain is a key characteristic, indicating tissue ischemia due to increased pressure within a closed anatomic space. Pallor results from compromised blood flow, and pulselessness indicates severe ischemia requiring immediate intervention. Choices B, C, and D are incorrect because localized redness and swelling, fever and infection, and loss of sensation are not specific signs of compartment syndrome. Therefore, the correct answer is A.

3. What is the purpose of an escharotomy?

A. To relieve pressure and improve circulation in burn injuries
B. To reduce pain in the affected area
C. To remove necrotic tissue from a wound
D. To prevent infection from spreading

Correct answer: A

Rationale: An escharotomy is performed to relieve pressure and improve circulation in areas affected by deep burns. This procedure helps prevent complications such as compartment syndrome by releasing the constricting eschar. Choice B is incorrect because while pain relief may be a secondary outcome of the procedure, the primary purpose is to address pressure and circulation issues. Choice C is incorrect as an escharotomy specifically focuses on releasing pressure, not removing necrotic tissue. Choice D is incorrect as the primary goal of an escharotomy is not to prevent infection but rather to address the immediate issues related to deep burn injuries.

4. What dietary recommendations should a patient with GERD follow?

A. Avoid mint and spicy foods
B. Consume liquids between meals
C. Eat three large meals per day
D. Drink milk as a snack

Correct answer: A

Rationale: Patients with GERD should follow dietary recommendations to manage their symptoms effectively. Choice A, 'Avoid mint and spicy foods,' is the correct answer. Mint and spicy foods can trigger acid reflux and worsen GERD symptoms. Choice B, 'Consume liquids between meals,' is not the best recommendation as consuming liquids during meals can worsen GERD symptoms by increasing stomach pressure. Choice C, 'Eat three large meals per day,' is incorrect as large meals can exacerbate GERD symptoms; instead, smaller, more frequent meals are recommended. Choice D, 'Drink milk as a snack,' is not ideal as full-fat dairy products like milk can trigger acid reflux in some individuals. Therefore, the best recommendation for a patient with GERD is to avoid mint and spicy foods.

5. A patient is admitted with an air leak in a chest tube system. What action should the nurse take?

A. Tighten the connections of the chest tube system
B. Continue monitoring the patient
C. Replace the chest tube system
D. Clamp the chest tube

Correct answer: A

Rationale: When caring for a patient with an air leak in the chest tube system, the nurse should tighten the connections of the chest tube system. This action can help resolve the air leak by ensuring there are no loose connections or leaks in the system. Continuing to monitor the patient (Choice B) is important, but addressing the air leak is a priority. Replacing the chest tube system (Choice C) may not be necessary if tightening the connections resolves the issue. Clamping the chest tube (Choice D) is not appropriate as it can lead to tension pneumothorax.