what are the early signs of hypokalemia on an ecg

ATI RN

ATI Capstone Adult Medical Surgical Assessment 2

1. What are the early signs of hypokalemia on an ECG?

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 sign of hypokalemia on an ECG. In hypokalemia, the T waves may flatten and eventually invert. Elevated ST segments are not typically associated with hypokalemia. Prominent U waves are seen in conditions like hypokalemia, but they are not considered an early sign. A widened QRS complex is more commonly associated with hyperkalemia rather than hypokalemia.

2. A nurse in a rural community center is providing education to a group of clients about first aid interventions for snake bites. Which of the following instructions should the nurse include in the teaching?

A. Apply an ice pack directly to the affected area
B. Immobilize the affected extremity with a splint
C. Place a tourniquet above and below the affected area
D. Elevate the affected extremity

Correct answer: B

Rationale: The correct answer is to immobilize the affected extremity with a splint. This helps to slow the spread of venom by limiting movement. Applying an ice pack directly to the affected area (Choice A) is not recommended for snake bites as it could exacerbate tissue damage. Placing a tourniquet above and below the affected area (Choice C) is also not advised as it can lead to further complications. Elevating the affected extremity (Choice D) is not recommended for snake bites; keeping it below the level of the heart is more appropriate to reduce venom spread.

3. 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.

4. What are the expected manifestations of a thrombotic stroke?

A. Gradual loss of function on one side of the body
B. Loss of sensation in the affected extremity
C. Sudden loss of consciousness
D. Seizures and convulsions

Correct answer: A

Rationale: The correct answer is A: Gradual loss of function on one side of the body. Thrombotic strokes are caused by a clot forming in a blood vessel supplying the brain, leading to a gradual onset of symptoms due to impaired blood flow to specific brain regions. Choices B, C, and D are incorrect because loss of sensation, sudden loss of consciousness, seizures, and convulsions are not typically associated with thrombotic strokes. In a thrombotic stroke, the symptoms develop slowly over time, often over minutes to hours, and include manifestations such as weakness, numbness, or paralysis on one side of the body, along with other symptoms related to the affected brain area.

5. A nurse is assessing a client who has meningitis. The nurse should identify which of the following findings as a positive Kernig's sign?

A. After stroking the lateral area of the foot, the client's toes contract and draw together
B. After hip flexion, the client is unable to extend their leg completely without pain
C. The client's voluntary movement is not coordinated
D. The client reports pain and stiffness when flexing their neck

Correct answer: B

Rationale: A positive Kernig's sign is identified when a client is unable to extend their leg completely without pain after hip flexion. This finding suggests meningeal irritation. Choices A, C, and D do not describe Kernig's sign. Choice A describes a normal plantar reflex, Choice C refers to coordination deficits, and Choice D indicates neck pain and stiffness, which are not related to Kernig's sign.