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 A
Explanation
A. Acute bronchospasm:
Albuterol (Proventil) is commonly used to treat acute bronchospasm, which is characterized by sudden constriction of the muscles surrounding the airways. This constriction leads to narrowing of the air passages, making it difficult to breathe. Albuterol works as a bronchodilator by relaxing these muscles, thereby opening up the airways and relieving symptoms such as wheezing, shortness of breath, and chest tightness. It is commonly used to manage conditions such as asthma, chronic obstructive pulmonary disease (COPD), and bronchitis, where bronchospasm is a prominent feature.
B. Acute allergies:
Albuterol (Proventil) is not typically used to treat acute allergies. While it can help alleviate symptoms such as wheezing and shortness of breath that may occur as a result of allergic reactions affecting the airways, its primary indication is for bronchospasm associated with respiratory conditions like asthma and COPD. Antihistamines and corticosteroids are more commonly used to manage allergic reactions and their associated symptoms.
C. Nasal congestion:
Albuterol (Proventil) is not indicated for the treatment of nasal congestion. Nasal congestion primarily involves swelling and inflammation of the nasal passages, which are not directly affected by albuterol. Decongestants such as pseudoephedrine or nasal corticosteroids are typically used to relieve nasal congestion by reducing inflammation and swelling in the nasal passages.
D. Dyspnea on exertion:
Albuterol (Proventil) may help alleviate dyspnea (shortness of breath) on exertion, particularly if it is caused by bronchospasm or exercise-induced bronchoconstriction. By relaxing the muscles around the airways, albuterol can improve airflow and ease breathing difficulties associated with exertion. However, it is important to note that albuterol is primarily indicated for the treatment of acute bronchospasm rather than dyspnea on exertion unrelated to bronchospasm. Other interventions, such as oxygen therapy or addressing underlying cardiovascular conditions, may be necessary to manage dyspnea on exertion in those cases.
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