A nurse in the emergency room is caring for a client who presents with manifestations that indicate a myocardial infarction. Which of the following prescriptions should the nurse take first?

The correct answer is: d. Brachial pulse in the right arm.

Choice A reason: Palpating the radial pulse in the right arm is not the most appropriate choice following a cardiac catheterization with a left antecubital insertion site. While it is contralateral to the insertion site, the brachial pulse is preferred over the radial pulse for assessing circulation in the arm, as it is more proximal and can provide a better indication of arterial flow from the catheterization site.

Choice B reason: The radial pulse in the left arm is the correct choice because it evaluates distal circulation in the affected limb. Since the catheterization was performed through the left antecubital fossa, it is crucial to monitor blood flow further down in the arm. Palpating the radial pulse helps detect early signs of compromised perfusion, such as diminished pulse strength. Evidence-based guidelines from clinical sources highlight the importance of distal pulse assessment post-catheterization.

Choice C reason: Palpating the brachial pulse in the left arm is also not recommended. Since the catheterization was performed on the left side, there is a risk of arterial occlusion or spasm, which could affect the accuracy of the pulse assessment in the left arm.

Choice D reason: The brachial pulse in the right arm does not provide relevant information about the left arm’s vascular status post-catheterization. Since the right arm was not affected by the procedure, its pulse does not indicate possible complications in the left arm. Clinical assessment should focus on detecting perfusion issues in the limb where the catheter was inserted. Best practices recommend prioritizing the evaluation of circulation in the affected extremity.

Choice A Reason: This is incorrect. Widening pulse pressure is not a sign of hypovolemic shock, but rather of increased intracranial pressure or aortic regurgitation. Hypovolemic shock causes narrowing pulse pressure due to decreased stroke volume and increased peripheral resistance.

Choice B Reason: This is correct. Increased heart rate is a sign of hypovolemic shock, as the body tries to compensate for the decreased blood volume and cardiac output by increasing the heart rate and contractility.

Choice C Reason: This is incorrect. Increased deep tendon reflexes are not a sign of hypovolemic shock, but rather of hyperreflexia or tetany. Hypovolemic shock causes decreased deep tendon reflexes due to reduced perfusion and oxygenation of the muscles and nerves.

Choice D Reason: This is incorrect. Pulse oximetry 96% is not a sign of hypovolemic shock, but rather of normal oxygen saturation. Hypovolemic shock causes decreased pulse oximetry due to hypoxia and impaired gas exchange.