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. The spacer increases the amount of medication delivered to the oropharynx.
Spacers are designed to minimize the amount of medication deposited in the oropharynx (back of the throat) and reduce the risk of side effects such as oral thrush or hoarseness. The main purpose of using a spacer is to optimize the delivery of medication to the lungs.
B. The spacer increases the amount of medication delivered to the lungs.
When reinforcing teaching with the parents of a child who is starting to use a spacer with a metered-dose inhaler (MDI) to treat asthma, the nurse should include the information that the spacer increases the amount of medication delivered to the lungs. Spacers help improve the delivery of medication from the MDI to the lungs by reducing the need for coordination between actuation of the MDI and inhalation. They also slow down the speed of the aerosolized medication particles, allowing more time for them to be inhaled into the lungs effectively.
C. Inhale rapidly when using the spacer with the MDI.
Inhaling rapidly may lead to improper inhalation technique and reduce the effectiveness of medication delivery to the lungs. Instead, the child should be instructed to inhale slowly and deeply to ensure that the medication reaches the lower airways.
D. Cover exhalation slots of the spacer with lips when inhaling.
Covering the exhalation slots of the spacer with lips during inhalation is not recommended. These slots are designed to allow the child to exhale freely and prevent buildup of pressure within the spacer. Encouraging the child to exhale into the spacer would hinder proper inhalation technique and could lead to decreased medication delivery to the lungs.
Correct Answer is D
Explanation
A. Asking the provider to repeat another radiograph of the chest.
This option is not the most appropriate action in this scenario. While a chest radiograph may be useful in certain situations to assess for complications such as pneumothorax or pneumonia, it is not typically the first intervention for an asthma exacerbation with increased wheezing and decreased oxygen saturation. In this acute situation, the priority is to provide immediate treatment to alleviate the client's symptoms and improve oxygenation.
B. Increasing oxygen to maintain an oxygen saturation of 95% or greater in the client.
While maintaining adequate oxygenation is important, especially in a client with asthma exacerbation, it is not the first-line intervention in this scenario. Oxygen supplementation may be necessary, but the priority is to address the underlying bronchospasm causing the decreased oxygen saturation. Therefore, this option may be considered after initiating appropriate bronchodilator therapy.
C. Requesting the pharmacy to dispense 10 mL of dextromethorphan PO.
This option is not appropriate for managing an asthma exacerbation. Dextromethorphan is a cough suppressant and does not address the underlying bronchospasm characteristic of asthma exacerbations. In fact, suppressing cough may hinder the clearance of mucus and exacerbate respiratory distress. Therefore, this intervention is not indicated and may delay appropriate treatment.
D. Instructing respiratory therapy to administer a PRN albuterol aerosol.
This is the correct action in this scenario. Albuterol is a short-acting bronchodilator commonly used to relieve bronchospasm and improve airflow in clients experiencing asthma exacerbations. Administering albuterol via aerosolized inhalation helps to quickly deliver the medication directly to the airways, providing rapid relief of symptoms such as wheezing and improving oxygenation. Therefore, instructing respiratory therapy to administer a PRN albuterol aerosol is the most appropriate intervention to address the client's acute symptoms.
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