Order: Diphenhydramine 25mg Q4H
Available: Diphenhydramine 12.5mg/5mL
How much will you administer?
2 mL
10 mL
25mL
12.5 mL
The Correct Answer is B
First, we need to find out how many milligrams (mg) are in 1 milliliter (mL) of the available diphenhydramine solution:
12.5 mg/5 mL
To find out how many milligrams are in 1 mL, we divide the total milligrams by the total milliliters:
12.5 mg ÷ 5 mL = 2.5 mg/mL
Now that we know the concentration of diphenhydramine is 2.5 mg/mL, we can calculate the dose needed for the order of 25 mg:
25 mg ÷ 2.5 mg/mL = 10 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Add tap water as needed to the suction control chamber.
This is not the correct action. The suction control chamber of a water-seal chest tube drainage system is typically filled with sterile water to the prescribed level by the healthcare provider during the initial setup. Adding tap water to the suction control chamber can disrupt the balance of the system and affect the prescribed suction level. The nurse should not add tap water without specific instructions from the healthcare provider.
B. Maintain the drainage container below the level of the client's chest.
This is the correct action. In a water-seal chest tube drainage system, it's important to keep the drainage container below the level of the client's chest. This positioning allows gravity to assist in the drainage of air or fluid from the pleural space into the drainage container. It also helps prevent backflow of fluid or air into the chest cavity, ensuring the effectiveness of the drainage system.
C. Empty the collection container every shift.
While it may be necessary to empty the collection container if it becomes full, emptying it every shift is not a set rule. The frequency of emptying the collection container should be based on the volume of drainage and the facility's policy. The nurse should monitor the collection container regularly and empty it when it reaches the appropriate level, typically around half full or as indicated by facility protocol.
D. Clamp the chest tubes if it becomes disconnected.
Clamping the chest tubes if they become disconnected is not recommended. It can lead to tension pneumothorax, a life-threatening condition where air accumulates in the pleural space and compresses the lung. If a chest tube becomes disconnected, the nurse should immediately assess the situation, secure the chest tube connections, and notify the healthcare provider for further management.
Correct Answer is B
Explanation
A. Facial flushing
Facial flushing is not typically associated with atelectasis. Instead, it may occur in conditions such as oxygen toxicity or fever.
B. Increasing dyspnea
Atelectasis is a condition characterized by the collapse or partial collapse of a portion of the lung. Common findings in a client with atelectasis include increasing dyspnea (shortness of breath) due to impaired gas exchange and reduced lung function. As the affected lung tissue collapses, ventilation and oxygenation are compromised, leading to difficulty breathing.
C. Decreasing respiratory rate
A decreasing respiratory rate is not typically observed in a client with atelectasis. Instead, respiratory rate may increase as the body attempts to compensate for the impaired gas exchange and oxygenation resulting from lung collapse.
D. Dry cough
While coughing is a common symptom of atelectasis, it is typically associated with a productive cough rather than a dry cough. A dry cough is more commonly associated with conditions such as viral respiratory infections or allergic reactions. In atelectasis, the cough may be productive as the body attempts to clear mucus or other secretions from the affected airways.
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