A nurse is providing care for a client who experienced a myocardial infarction prior to a cardiac arrest. Which of the following laboratory tests will identify early injury to the cardiac muscle?

The correct answer is choiceC. Remove the cap and place it sterile-side up on a clean surface.

Choice A rationale:

Placing sterile gauze over areas of spilled solution within the sterile field is not recommended. Spilled solution can compromise the sterility of the field, and covering it with gauze does not restore sterility. Instead, the nurse should avoid spilling solution to maintain the sterile field.

Choice B rationale:

Holding the irrigation solution bottle with the label facing away from the palm of the hand is incorrect. The correct technique is to hold the bottle with the label facing the palm. This prevents the label from getting wet and unreadable, ensuring that the nurse can always identify the solution correctly.

Choice C rationale:

Removing the cap and placing it sterile-side up on a clean surface is the correct action. This maintains the sterility of the cap, preventing contamination when it is replaced on the bottle. Ensuring the cap remains sterile is crucial for maintaining the sterility of the solution.

Choice D rationale:

Holding the bottle in the center of the sterile field when pouring the solution is incorrect. The bottle should be held outside the sterile field to prevent contamination. The solution should be poured carefully to avoid splashing and compromising the sterile field.

The correct answer is choice C. Blow into the meter as hard and quickly as possible.

This is because a peak flow meter measures how fast you can push air out of your lungs when you blow out as hard and as fast as you can.

This is called peak expiratory flow rate (PEFR) or peak expiratory flow (PEF). It shows how open the airways are in the lungs and can help detect early signs of worsening asthma.

Choice A is wrong because maintaining a semi-Fowler’s position during testing is not necessary. You can sit or stand up straight, but make sure you do it the same way each time.

Choice B is wrong because placing tongue on the mouthpiece of the meter can block the air flow and affect the accuracy of the measurement. You should close your lips tightly on the mouthpiece instead.

Choice D is wrong because recording the average of the readings is not recommended.

You should record the highest of the three readings on a sheet of paper, calendar or in your asthma diary. This is your daily peak flow.

Normal ranges for peak flow vary depending on age, height, gender and race. You can use a chart or calculator to find out your predicted normal peak flow based on these factors. However, it is more important to find out your personal best peak flow by performing peak flow testing twice a day for two weeks when your asthma is under good control. Your personal best peak flow will be used to create your asthma action plan with your healthcare provider.