The client tells the nurse, "My physician told me that I had a non-ST elevation myocardial infarction (NSTEMI). " I thought all heart attacks were the same. Can you explain this to me?" The nurse's best response to the client's question would be: "NSTEMI is

A. There is continuous bubbling in the water-seal chamber: Continuous bubbling in the water-seal chamber suggests a potential air leak in the system, which needs to be investigated. The water-seal chamber is designed to prevent backflow of air into the pleural space, and persistent bubbling typically indicates that air is escaping from the pleural cavity or there is a problem with the tubing or chest tube placement. This is the first sign that the system may not be sealed properly and should be checked for leaks.

B. The water levels in the water-seal chamber and suction chambers are decreased: Decreased water levels in both the water-seal and suction chambers may be indicative of fluid loss or evaporation, but it does not necessarily point to a leak. In the case of a chest tube, water levels may also drop due to suction pressure or gradual evaporation, which would need to be adjusted or monitored. While this should be addressed, it is not an immediate cause for suspicion of an air leak in the system.

C. Fluid in the water-seal chamber fluctuates with the client's breathing: The fluctuation (also known as "tidaling") in the water-seal chamber is a normal finding that occurs when the client breathes in and out. It reflects the pressure changes in the pleural cavity during respiration. The absence of tidaling might indicate that the lung has re-expanded or that there is a blockage in the tubing. While tidaling is a normal occurrence, the absence or abnormality of this fluctuation would require further assessment but not for an air leak.

D. There is constant bubbling in the suction-control chamber: Constant bubbling in the suction-control chamber generally indicates that suction is appropriately applied to the system. However, if there is continuous bubbling in this chamber, it is typically related to the level of suction being applied, not an air leak. This is a normal occurrence and does not require checking for leaks in the system unless suction pressure is too high or low for optimal functioning.

A. Notify the healthcare provider: While notifying the healthcare provider may eventually be necessary, the first priority is to ensure the client's airway is protected and they are receiving adequate ventilation. The provider can be notified after immediate interventions have been made to stabilize the patient.

B. Insert an oral airway to prevent the client from biting the tube: Inserting an oral airway may be necessary if the client is biting the endotracheal tube, but this is unlikely the first action needed in response to a low-pressure alarm. If the client is not biting the tube, this action will not address the potential causes of the low-pressure alarm, such as a disconnection, leak, or circuit issue.

C. Suction the client and reset the alarm: While suctioning is an important intervention if secretions are the cause of ventilation issues, it is not the first action when the source of the low-pressure alarm is unclear. If a disconnection or leak is the issue, suctioning will not resolve the problem, and the nurse risks delaying appropriate action to address the source of the alarm. The priority is ensuring the client’s ventilation is not compromised, which is best accomplished by using a manual resuscitation bag until the problem is identified and corrected.

D. Disconnect the client from the ventilator and use a manual resuscitation bag: If the source of the low-pressure alarm cannot be identified after checking the client and the ventilator, the first priority is to ensure that the client continues to receive adequate ventilation. Disconnecting the client from the ventilator and using a manual resuscitation bag (Ambu bag) allows for immediate support of the patient's ventilation while the nurse investigates the cause of the alarm. This ensures the client's oxygenation and ventilation needs are met until the problem is resolved. It is critical to address any potential loss of positive pressure or leaks in the ventilator system promptly to avoid respiratory distress or failure.