Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
A nurse is reviewing the laboratory results of a client who is postoperative and has a respiratory rate of 7/min. The arteriaI 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 make7
A. Metabolic acidosis
Metabolic acidosis:Metabolic acidosis is characterized by a low pH (<7.35) and a low bicarbonate level (<22 mEq/L) due to an excess of acids in the body or a loss of bicarbonate. However, in the given ABG values, the pH is low (7.22), but the bicarbonate level is elevated (28 mEq/L), which does not align with metabolic acidosis. Therefore, metabolic acidosis is not the correct interpretation in this case.
B. Respiratory acidosis
Respiratory acidosis:Respiratory acidosis occurs when there is inadequate removal of carbon dioxide (CO2) by the lungs, leading to an accumulation of CO2 in the blood and a decrease in pH. In the ABG values provided, the pH is low (7.22), and the PaCO2 is elevated (68 mm Hg), indicating respiratory acidosis as the primary disturbance. This interpretation is supported by the elevated PaCO2 and the low pH, making it the correct choice based on the given data.
C. Respiratory alkalosis
Respiratory alkalosis: Respiratory alkalosis results from hyperventilation, leading to excessive elimination of CO2 and a decrease in PaCO2 levels. However, in the ABG values presented, the PaCO2 is elevated (68 mm Hg), which contradicts the expected decrease seen in respiratory alkalosis. Therefore, respiratory alkalosis is not the correct interpretation of the ABG values in this case.
D. Metabolic alkalosis
Metabolic alkalosis:Metabolic alkalosis is characterized by a high pH (>7.45) and a high bicarbonate level (>26 mEq/L) due to excessive loss of acids or an increase in bicarbonate levels. However, in the ABG values provided, the pH is low (7.22), and the bicarbonate level is elevated (28 mEq/L), which is not consistent with metabolic alkalosis. Therefore, metabolic alkalosis is not the correct interpretation based on the given data.
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Full Explanation
A. Metabolic acidosis:
Metabolic acidosis is characterized by a low pH (<7.35) and a low bicarbonate level (<22 mEq/L) due to an excess of acids in the body or a loss of bicarbonate. However, in the given ABG values, the pH is low (7.22), but the bicarbonate level is elevated (28 mEq/L), which does not align with metabolic acidosis. Therefore, metabolic acidosis is not the correct interpretation in this case.
B. Respiratory acidosis:
Respiratory acidosis occurs when there is inadequate removal of carbon dioxide (CO2) by the lungs, leading to an accumulation of CO2 in the blood and a decrease in pH. In the ABG values provided, the pH is low (7.22), and the PaCO2 is elevated (68 mm Hg), indicating respiratory acidosis as the primary disturbance. This interpretation is supported by the elevated PaCO2 and the low pH, making it the correct choice based on the given data.
C. Respiratory alkalosis:
Respiratory alkalosis results from hyperventilation, leading to excessive elimination of CO2 and a decrease in PaCO2 levels. However, in the ABG values presented, the PaCO2 is elevated (68 mm Hg), which contradicts the expected decrease seen in respiratory alkalosis. Therefore, respiratory alkalosis is not the correct interpretation of the ABG values in this case.
D. Metabolic alkalosis:
Metabolic alkalosis is characterized by a high pH (>7.45) and a high bicarbonate level (>26 mEq/L) due to excessive loss of acids or an increase in bicarbonate levels. However, in the ABG values provided, the pH is low (7.22), and the bicarbonate level is elevated (28 mEq/L), which is not consistent with metabolic alkalosis. Therefore, metabolic alkalosis is not the correct interpretation based on the given data.
Similar Questions
A nurse is preparing a patient for discharge after surgery. The patient needs to change a large dressing and manage a drain at home. What instruction by the nurse is most important?
A. “Call your surgeon if you have any questions at home.”
“Call your surgeon if you have any questions at home.”This instruction is important as it encourages the patient to seek help and clarification if they have any concerns or questions about their postoperative care at home. However, while communication with the surgeon is essential, it is not as immediately critical as ensuring proper hand hygiene when dealing with wound care and drain management.
B. ”Eat a diet high in protein, iron, zinc, and vitamin C.”
”Eat a diet high in protein, iron, zinc, and vitamin C.”Nutritional advice is crucial for postoperative recovery, as a balanced diet high in protein, iron, zinc, and vitamin C can promote wound healing and overall recovery. However, while important for long-term recovery and healing, dietary recommendations do not directly address the immediate risk of infection or complications associated with wound care and drain management.
C. “Wash your hands before touching the drain or dressing."
“Wash your hands before touching the drain or dressing." This instruction is the most important in this context because proper hand hygiene is crucial for preventing infections during wound care and drain management. Clean hands significantly reduce the risk of introducing harmful bacteria or contaminants to the surgical site, which can lead to infections and other complications. Ensuring that the patient washes their hands before touching the drain or dressing is a fundamental measure for promoting wound healing and preventing postoperative complications.
D. “Be sure you keep all your postoperative appointments.”
“Be sure you keep all your postoperative appointments.”Keeping postoperative appointments is important for ongoing assessment, monitoring, and follow-up care. However, while essential for overall recovery and management of postoperative issues, it is not as immediate or directly related to the patient's ability to manage their dressing and drain at home.
Full Explanation
A. “Call your surgeon if you have any questions at home.”
This instruction is important as it encourages the patient to seek help and clarification if they have any concerns or questions about their postoperative care at home. However, while communication with the surgeon is essential, it is not as immediately critical as ensuring proper hand hygiene when dealing with wound care and drain management.
B. ”Eat a diet high in protein, iron, zinc, and vitamin C.”
Nutritional advice is crucial for postoperative recovery, as a balanced diet high in protein, iron, zinc, and vitamin C can promote wound healing and overall recovery. However, while important for long-term recovery and healing, dietary recommendations do not directly address the immediate risk of infection or complications associated with wound care and drain management.
C. “Wash your hands before touching the drain or dressing."
This instruction is the most important in this context because proper hand hygiene is crucial for preventing infections during wound care and drain management. Clean hands significantly reduce the risk of introducing harmful bacteria or contaminants to the surgical site, which can lead to infections and other complications. Ensuring that the patient washes their hands before touching the drain or dressing is a fundamental measure for promoting wound healing and preventing postoperative complications.
D. “Be sure you keep all your postoperative appointments.”
Keeping postoperative appointments is important for ongoing assessment, monitoring, and follow-up care. However, while essential for overall recovery and management of postoperative issues, it is not as immediate or directly related to the patient's ability to manage their dressing and drain at home.
Most of the deaths from burn trauma in the emergent phase that require a referral to a burn center result from:
A. cardiac arrest related to septic shock
Cardiac arrest related to septic shock:Septic shock can occur in burn patients due to the breakdown of the skin barrier, which allows pathogens to enter the bloodstream and cause systemic infection. However, while septic shock is a serious complication of burn injuries, it is not the primary cause of death in the emergent phase. Septic shock can lead to multiple organ failure and contribute to mortality, but it is often a later complication rather than an immediate cause in the emergent phase.
B. Infection
Infection:Infections are a significant concern in burn patients, especially as the burn wound provides an ideal environment for bacterial growth. However, infections typically contribute more significantly to mortality in the later phases of burn care rather than in the emergent phase. In the emergent phase, hypovolemic shock and other immediate complications have a greater impact on mortality.
C. adrenal failure
Adrenal failure: Adrenal failure, specifically acute adrenal insufficiency or Addisonian crisis, can occur in burn patients due to the stress response and corticosteroid depletion. While adrenal insufficiency is a concern in severe burn cases, it is not the primary cause of death in the emergent phase requiring referral to a burn center.
D. hypovolemic shock and renal failure.
Hypovolemic shock and renal failure:Hypovolemic shock is a critical concern in the emergent phase of burn trauma because burns can lead to significant fluid loss and electrolyte imbalances. Hypovolemic shock results from insufficient circulating blood volume, leading to inadequate perfusion of organs and tissues, which can be life-threatening. Additionally, renal failure can develop due to hypovolemia, decreased cardiac output, and the release of inflammatory mediators, leading to acute kidney injury (AKI). Hypovolemic shock and subsequent renal failure are major contributors to mortality in the emergent phase of burn trauma, necessitating prompt referral to a burn center for specialized care.
Full Explanation
A. Cardiac arrest related to septic shock:
Septic shock can occur in burn patients due to the breakdown of the skin barrier, which allows pathogens to enter the bloodstream and cause systemic infection. However, while septic shock is a serious complication of burn injuries, it is not the primary cause of death in the emergent phase. Septic shock can lead to multiple organ failure and contribute to mortality, but it is often a later complication rather than an immediate cause in the emergent phase.
B. Infection:
Infections are a significant concern in burn patients, especially as the burn wound provides an ideal environment for bacterial growth. However, infections typically contribute more significantly to mortality in the later phases of burn care rather than in the emergent phase. In the emergent phase, hypovolemic shock and other immediate complications have a greater impact on mortality.
C. Adrenal failure:
Adrenal failure, specifically acute adrenal insufficiency or Addisonian crisis, can occur in burn patients due to the stress response and corticosteroid depletion. While adrenal insufficiency is a concern in severe burn cases, it is not the primary cause of death in the emergent phase requiring referral to a burn center.
D. Hypovolemic shock and renal failure:
Hypovolemic shock is a critical concern in the emergent phase of burn trauma because burns can lead to significant fluid loss and electrolyte imbalances. Hypovolemic shock results from insufficient circulating blood volume, leading to inadequate perfusion of organs and tissues, which can be life-threatening. Additionally, renal failure can develop due to hypovolemia, decreased cardiac output, and the release of inflammatory mediators, leading to acute kidney injury (AKI). Hypovolemic shock and subsequent renal failure are major contributors to mortality in the emergent phase of burn trauma, necessitating prompt referral to a burn center for specialized care.
A nurse cares for a patient who has a deep wound that is being treated with a wet to-damp (used to be dry) dressing. Which intervention would the nurse include in this patient’s plan of care?
A. Change the dressing when it is saturated.
Change the dressing when it is saturated:This intervention is the most appropriate for managing a deep wound with a wet to-damp dressing. Wet to-damp dressings are designed to maintain a moist environment conducive to wound healing. Changing the dressing when it becomes saturated with wound exudate helps prevent excessive moisture accumulation, which can lead to skin maceration and potential infection. It ensures that the wound bed remains in an optimal healing environment and reduces the risk of complications.
B. Assess the wound bed once a day.
Assess the wound bed once a day:Assessing the wound bed is an essential part of wound care, as it allows the nurse to monitor healing progress, assess for signs of infection, and evaluate the effectiveness of the chosen dressing. However, the frequency of wound bed assessment may vary depending on the specific patient's needs and the type of dressing being used. While daily assessment is generally recommended, it does not directly dictate the timing of dressing changes for wet to-damp dressings, which are primarily changed based on saturation levels.
C. Contact the provider when the dressing leaks.
Contact the provider when the dressing leaks: Contacting the provider when the dressing leaks or when there are concerns or complications is an important step in patient care. Leaking dressings can indicate issues with the dressing application, excessive wound exudate, or potential complications such as infection. It's crucial to inform the provider promptly so that appropriate interventions can be implemented, but this instruction is more reactive and does not specifically address the timing of dressing changes.
D. Change the dressing every 6 hours.
Change the dressing every 6 hours:Changing the dressing every 6 hours is not typically recommended for wet to-damp dressings unless specifically indicated based on the patient's condition and the amount of wound exudate. Frequent dressing changes can disrupt the healing process, cause unnecessary trauma to the wound bed, and increase the risk of infection. Dressing change frequency should be based on the assessment of wound exudate and the dressing's ability to maintain a moist environment.
Full Explanation
A. Change the dressing when it is saturated:
This intervention is the most appropriate for managing a deep wound with a wet to-damp dressing. Wet to-damp dressings are designed to maintain a moist environment conducive to wound healing. Changing the dressing when it becomes saturated with wound exudate helps prevent excessive moisture accumulation, which can lead to skin maceration and potential infection. It ensures that the wound bed remains in an optimal healing environment and reduces the risk of complications.
B. Assess the wound bed once a day:
Assessing the wound bed is an essential part of wound care, as it allows the nurse to monitor healing progress, assess for signs of infection, and evaluate the effectiveness of the chosen dressing. However, the frequency of wound bed assessment may vary depending on the specific patient's needs and the type of dressing being used. While daily assessment is generally recommended, it does not directly dictate the timing of dressing changes for wet to-damp dressings, which are primarily changed based on saturation levels.
C. Contact the provider when the dressing leaks:
Contacting the provider when the dressing leaks or when there are concerns or complications is an important step in patient care. Leaking dressings can indicate issues with the dressing application, excessive wound exudate, or potential complications such as infection. It's crucial to inform the provider promptly so that appropriate interventions can be implemented, but this instruction is more reactive and does not specifically address the timing of dressing changes.
D. Change the dressing every 6 hours:
Changing the dressing every 6 hours is not typically recommended for wet to-damp dressings unless specifically indicated based on the patient's condition and the amount of wound exudate. Frequent dressing changes can disrupt the healing process, cause unnecessary trauma to the wound bed, and increase the risk of infection. Dressing change frequency should be based on the assessment of wound exudate and the dressing's ability to maintain a moist environment.