A nurse is caring for a patient who has acute kidney injury.
The patient’s ABGs are: pH: 7.26, PaCO2: 30 mm Hg, HCO3: 14 mEq/L. Which of the following acid-base imbalances should the nurse identify the patient is experiencing?
Metabolic alkalosis.
Metabolic acidosis.
Respiratory alkalosis.
Respiratory acidosis.
The Correct Answer is B
Choice A rationale:
Metabolic alkalosis is characterized by a high pH (above 7.45), high bicarbonate (HCO3-) levels, and normal or low PaCO2. The patient's ABGs show a low pH (7.26), low bicarbonate (14 mEq/L), and low PaCO2 (30 mm Hg), which are not consistent with metabolic alkalosis.
Choice C rationale:
Respiratory alkalosis is characterized by a high pH (above 7.45), low PaCO2, and normal or slightly elevated bicarbonate levels. The patient's ABGs do show a low PaCO2, but the pH is low (acidic) and the bicarbonate is low, which are not consistent with respiratory alkalosis.
Choice D rationale:
Respiratory acidosis is characterized by a low pH (below 7.35), high PaCO2, and normal or slightly elevated bicarbonate levels. The patient's ABGs do show a low pH, but the PaCO2 is also low, which is not consistent with respiratory acidosis.
Rationale for the correct answer, B:
Metabolic acidosis is characterized by a low pH (below 7.35), low bicarbonate levels, and normal or low PaCO2. The patient's ABGs are consistent with metabolic acidosis because they show a low pH (7.26), low bicarbonate (14 mEq/L), and low PaCO2 (30 mm Hg).
Acute kidney injury is a common cause of metabolic acidosis. The kidneys play a vital role in regulating acid-base balance by excreting acids and reabsorbing bicarbonate. When the kidneys are damaged, they are unable to excrete acids effectively, leading to an accumulation of acids in the blood and a decrease in bicarbonate levels.
Additional Information:
It's important to note that the patient's low PaCO2 is likely a compensatory mechanism for the metabolic acidosis. In response to acidosis, the respiratory system tries to increase ventilation to blow off more carbon dioxide, which helps to raise the pH. However, this compensatory mechanism is often not enough to fully correct the acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Incorrect. Patients have a legal right to access their medical records under the Health Information Portability and Accountability Act (HIPAA). Denying access is a violation of patient rights and could lead to legal consequences.
Undermines patient autonomy and trust. Patients have a right to know what information is in their medical records and to participate in their own healthcare decisions. Denying access can erode trust in the healthcare system.
Potential for errors and misunderstandings. If patients cannot review their records, they may not be able to identify errors or misunderstandings that could impact their care.
Choice B rationale:
Correct. This response upholds patient rights while ensuring that the request for access is documented and handled appropriately.
Protects patient privacy and confidentiality. The written request process helps to ensure that only the patient or their authorized representative has access to the records.
Provides a mechanism for tracking and auditing access requests. This can help to prevent unauthorized access and ensure compliance with HIPAA regulations.
Choice C rationale:
Incorrect. Patients have a right to access their records at any time, not just when they are being discharged.
Delays access to information. Patients may need to review their records to make informed decisions about their care, even if they are not being discharged.
Potential for records to be lost or misplaced. There is a risk that records could be lost or misplaced if they are not provided to the patient until discharge.
Choice D rationale:
Incorrect. Patients do not need to provide a reason for wanting to access their medical records.
Intrusive and unnecessary. Patients may feel uncomfortable or embarrassed about having to explain their reasons for wanting to access their records.
Potential for discrimination. Patients may be less likely to request access to their records if they feel that they will be judged or questioned about their reasons for doing so.
Correct Answer is B
Explanation
Choice B rationale:
Stridor is a high-pitched, wheezing sound that is heard during inspiration. It is caused by a narrowing or obstruction of the upper airway. This can be a serious complication after extubation, as it can indicate that the patient is not able to breathe adequately. Stridor can be caused by a number of factors, including:
Laryngeal edema: This is swelling of the larynx, which can be caused by irritation from the endotracheal tube.
Laryngospasm: This is a sudden constriction of the muscles of the larynx, which can be caused by irritation or by a foreign body in the airway.
Vocal cord paralysis: This is a loss of movement of the vocal cords, which can be caused by damage to the nerves that control them.
Blood or secretions in the airway: These can obstruct the airway and cause stridor.
It is important for the nurse to report stridor to the provider immediately so that the cause can be identified and treated. Treatment may include:
Oxygen therapy: This can help to improve the patient's breathing.
Medications: These may be used to reduce inflammation or to relax the muscles of the airway. Reintubation: This may be necessary if the patient is not able to breathe adequately on their own.
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