A nurse is caring for a client in the ICU. The client's ECG monitor tracing reveals sinus bradycardia and ST-segment elevation. The client reports shortness of breath and feeling dizzy and faint. Which of the following medications should the nurse administer?

Choice A reason: Clearing items from the client's surrounding area is important, but it is not the first action a nurse should take. The priority is to prevent injury to the client, and while removing potential hazards is part of this, it comes after ensuring the client's immediate safety.

Choice B reason: Loosening restrictive clothing can help the client breathe more easily and prevent further injury. However, this is not the first step in seizure first aid. The initial focus should be on preventing injury by controlling the client's fall.

Choice C reason: Lowering the client to the floor is the first and most critical action to take. This prevents a fall that could result in serious injury. Once on the floor, the client should be turned gently onto one side to help maintain an open airway and allow any fluids to drain, which can help prevent aspiration.

Choice D reason: Obtaining the client's vital signs is a secondary action after the seizure has ended. During a seizure, the primary concern is the client's immediate safety, which includes preventing injury and maintaining an open airway.

Choice A reason: The Mantoux skin test, also known as the tuberculin skin test, measures the immune response to the tuberculin purified protein derivative injected into the skin. An induration of less than 1 mm is not considered a positive result. However, the size of the induration in the Mantoux test does not indicate whether the person is infectious or not.

Choice B reason: Negative sputum cultures for acid-fast bacillus (AFB) are a strong indication that the client is no longer infectious. Pulmonary tuberculosis is diagnosed and monitored by the presence of AFB in the sputum. When the sputum cultures are negative, it suggests that the client is not excreting the bacteria and is less likely to spread the infection to others.

Choice C reason: While no longer coughing up blood-tinged sputum is a sign of clinical improvement, it does not necessarily mean that the client is no longer infectious. The absence of blood in the sputum may indicate reduced inflammation or healing of lung tissue, but the client could still be capable of transmitting tuberculosis if AFB is present in the sputum.

Choice D reason: The Quantiferon-TB Gold test is a blood test that measures the immune response to Mycobacterium tuberculosis antigens. A positive result indicates that the person's immune system has been exposed to the bacteria, but it does not determine if the person is infectious. The term "positive (negative)" is contradictory and does not provide clear information about the client's infectious status.