A nurse is caring for a client who has a cardiopulmonary arrest. The nurse anticipates the emergency response team will administer which of the following medications if the client's restored rhythm is symptomatic bradycardia?

Choice a) is incorrect because troponin is not an enzyme, but a protein. Enzymes are molecules that speed up chemical reactions in the body. Troponin does not have this function.

Choice b) is correct because troponin is a protein that binds to calcium and regulates the contraction of heart muscle fibers. When the heart muscle is injured, such as in a myocardial infarction, troponin leaks into the bloodstream and can be detected by a blood test. The higher the level of troponin, the more severe the damage to the heart.

Choice c) is incorrect because troponin does not help transport oxygen throughout the body. That function is performed by hemoglobin, which is a protein found in red blood cells.

Choice d) is incorrect because troponin is not a lipid, but a protein. Lipids are fats that are used for energy storage and cell membrane formation. Troponin does not have these roles.

The correct answer is: a. Place a black tag on the client’s upper body and attempt to help the next client in need.

Choice A: Place a black tag on the client’s upper body and attempt to help the next client in need.

In mass casualty incidents, the START (Simple Triage and Rapid Treatment) triage system is often used. According to this system, if a patient is apneic (not breathing) and does not resume breathing after repositioning the airway, they are considered deceased or non-salvageable and should be tagged with a black tag. This allows the nurse to focus on other victims who have a higher chance of survival.

Choice B: Start CPR

While starting CPR might seem appropriate in a normal setting, during a mass casualty incident, resources and time are limited. The priority is to save as many lives as possible. Performing CPR on an apneic patient with a weak pulse would take significant time and resources that could be used to help other victims with a higher chance of survival.

Choice C: Place a red tag on the client’s upper body and obtain immediate help from other personnel.

A red tag is used for patients who need immediate care and have a high chance of survival if treated promptly. Since the client remains apneic even after repositioning the airway, they do not meet the criteria for a red tag.

Choice D: Reposition the client’s upper airway a second time before assessing his respirations.

Repositioning the airway a second time is not recommended in the START triage system. If the patient does not resume breathing after the initial repositioning, they are considered non-salvageable.