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 C
Explanation
Choice A rationale:
Irreversible shock is the final stage of shock, where the body's compensatory mechanisms have failed, and damage to vital organs is irreversible. This stage is characterized by:
Profound hypotension (systolic blood pressure persistently below 60 mmHg) Severely altered mental status (unresponsiveness or coma)
Widespread organ failure (kidney failure, liver failure, respiratory failure) Lack of response to aggressive fluid resuscitation and vasopressor therapy
The patient in the question does not exhibit all of these signs and symptoms, particularly the profound hypotension and irreversible organ failure. Therefore, irreversible shock is not the most likely stage.
Choice B rationale:
End-organ dysfunction is a stage of shock where inadequate tissue perfusion has begun to cause damage to vital organs. This stage is characterized by:
Hypotension that may respond to fluid resuscitation
Signs of organ dysfunction, such as decreased urine output, altered mental status, or respiratory distress
The patient in the question does have some signs of organ dysfunction, such as confusion and crackles on lung auscultation. However, the hypotension is not as severe as typically seen in end-organ dysfunction shock, and there is no mention of other organ dysfunction like decreased urine output. Therefore, end-organ dysfunction is not the most likely stage.
Choice C rationale:
Early reversible shock is the initial stage of shock, where the body's compensatory mechanisms are still able to maintain blood pressure and organ perfusion. This stage is characterized by:
Mild to moderate hypotension Tachycardia
Cool, clammy skin Narrowed pulse pressure Restlessness or anxiety
The patient in the question presents with all of these signs and symptoms, making early reversible shock the most likely stage.
Choice D rationale:
Preshock is a state of impending shock, where the body's compensatory mechanisms are activated but not yet fully effective. This stage is characterized by:
Normal or slightly low blood pressure Tachycardia
Cool, clammy skin Restlessness or anxiety
The patient in the question has hypotension, which is not consistent with preshock. Therefore, preshock is not the correct stage.
Correct Answer is D
Explanation
Choice A rationale:
Notifying the facility's security department may be necessary in some cases, but it should not be the nurse's first action. This could escalate the situation and make the patient feel threatened or coerced. It's important to first attempt to de-escalate the situation and understand the patient's reasons for wanting to leave. Involving security prematurely could damage the nurse- patient relationship and make it more difficult to provide care in the future.
Security should be involved if the patient is a danger to themselves or others, or if they are attempting to leave in a way that could cause harm. However, in most cases, it is best to try to resolve the situation through communication and understanding.
Choice B rationale:
Calling the patient's family may be helpful in some cases, but it is not always necessary or appropriate. The nurse should first assess the patient's decision-making capacity and their understanding of the risks of leaving against medical advice. If the patient is capable of making their own decisions, the nurse should respect their autonomy and not involve family members without their consent.
Involving family members without the patient's consent could breach confidentiality and erode trust. It's important to balance the patient's right to privacy with the potential benefits of involving family members.
Choice C rationale:
Insisting that the patient exit the hospital via a wheelchair is not necessary in most cases. If the patient is able to walk and does not pose a safety risk, they should be allowed to leave on their own terms. Requiring a wheelchair could be seen as patronizing or controlling, and it could further upset the patient.
The use of a wheelchair should be based on the patient's individual needs and preferences, not on a blanket policy.
Choice D rationale:
Making sure the patient understands that they are leaving against medical advice is the most important action the nurse can take. This ensures that the patient is aware of the potential risks of leaving the hospital, and it protects the nurse from liability. The nurse should document the patient's decision in the medical record and have the patient sign an Against Medical Advice (AMA) form.
By ensuring informed consent, the nurse respects the patient's autonomy while also fulfilling their professional obligations.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.
