A nurse is reviewing the laboratory results of a client who is postoperative and has a respiratory rate of 7/min. The arterial blood gas (ABG) values include: pH 7.22 PaCO2 68 mm Hg Base excess -2 PaO2 78 mm Hg Oxygen saturation 80% Bicarbonate 28 mEq/L. Which of the following interpretations of the ABG values should the nurse make?
Metabolic acidosis
Respiratory acidosis
Metabolic alkalosis
Respiratory alkalosis
The Correct Answer is B
A. Metabolic acidosis
Metabolic acidosis is characterized by a low pH (< 7.35) and a decreased bicarbonate level (< 22 mEq/L). In this scenario, the pH is low (7.22), but the bicarbonate level is elevated (28 mEq/L), which does not support a diagnosis of metabolic acidosis.
B. Respiratory acidosis
Respiratory acidosis occurs when there is an accumulation of carbon dioxide (PaCO2 > 45 mm Hg), leading to a decrease in pH (< 7.35). In this case, the pH is low (7.22), and the PaCO2 is elevated (68 mm Hg), consistent with respiratory acidosis.
C. Metabolic alkalosis
Metabolic alkalosis is characterized by a high pH (> 7.45) and an elevated bicarbonate level (> 26 mEq/L). In this scenario, the pH is low (7.22), and the bicarbonate level is also elevated (28 mEq/L), which does not support a diagnosis of metabolic alkalosis.
D. Respiratory alkalosis
Respiratory alkalosis occurs when there is a decrease in carbon dioxide (PaCO2 < 35 mm Hg), leading to an increase in pH (> 7.45). In this case, the pH is low (7.22), and the PaCO2 is elevated (68 mm Hg), which is not consistent with respiratory alkalosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Place tissue soiled with respiratory secretions in a paper bag for later disposal:
This instruction is not accurate or recommended for managing tissue soiled with respiratory secretions, particularly in the context of tuberculosis (TB) infection. TB is transmitted through the air via respiratory droplets, so proper disposal of contaminated materials is crucial to prevent the spread of the infection. Instead of placing tissue in a paper bag, it should be disposed of in a sealed plastic bag to minimize the risk of transmission. Additionally, individuals with TB should be instructed on proper respiratory hygiene practices, such as covering their mouth and nose with a tissue or their elbow when coughing or sneezing, to prevent the spread of infectious droplets.
B. Provide samples for sputum cultures every 6 weeks:
Sputum cultures are an essential component of monitoring and managing tuberculosis (TB) treatment. However, obtaining samples every 6 weeks is not frequent enough, especially during the initial phase of treatment. In the early stages of TB treatment, sputum cultures are typically obtained more frequently, often weekly or biweekly, to monitor the response to treatment, assess for drug resistance, and ensure treatment effectiveness. As treatment progresses and the patient's condition stabilizes, the frequency of sputum cultures may be adjusted based on clinical judgment and guidelines.
C. Consume alcohol in moderation while taking antituberculosis medications:
Alcohol consumption is generally discouraged while taking antituberculosis medications. Some antituberculosis drugs, such as isoniazid and rifampin, can interact with alcohol and cause adverse effects, such as liver toxicity or drug metabolism issues. Therefore, individuals undergoing treatment for tuberculosis should be advised to abstain from alcohol consumption or limit it to a minimum to avoid potential complications. Providing instructions on alcohol consumption is an important aspect of tuberculosis management and medication adherence.
D. Wear a mask while out or around crowds of people:
This instruction is crucial for individuals with pulmonary tuberculosis to prevent the spread of the infection to others. Tuberculosis is transmitted through the air via respiratory droplets, particularly when an infected person coughs, sneezes, or talks. Wearing a mask while out or in crowded settings helps reduce the risk of transmitting infectious droplets to others and is an important infection control measure. It is especially important during the early stages of treatment when the individual is still infectious and shedding bacteria. Proper mask use, along with other respiratory hygiene practices, can help protect both the individual with tuberculosis and those around them from the spread of infection.
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.
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