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
Metabolic acidosis
Respiratory acidosis
Respiratory alkalosis
Metabolic alkalosis
The Correct Answer is B
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Excessive scarring:
Excessive scarring is not an example of a first-degree burn. It typically occurs in more severe burns that affect deeper layers of the skin, such as second-degree or third-degree burns. Second-degree burns extend into the dermis, while third-degree burns damage all layers of the skin and can lead to significant scarring. First-degree burns, on the other hand, only affect the outer layer of the skin (epidermis) and usually do not result in excessive scarring.
B. Blistering from flames:
Blistering from flames is more characteristic of a second-degree burn rather than a first-degree burn. Second-degree burns involve damage to both the epidermis and part of the dermis, which can result in blister formation. These burns are often caused by direct contact with flames, hot liquids, or steam.
C. Blackened dead skin:
Blackened dead skin is indicative of a third-degree burn, which is the most severe type of burn. Third-degree burns damage all layers of the skin, including the epidermis, dermis, and sometimes underlying tissues. The skin may appear charred or blackened, and these burns often require medical intervention, such as skin grafting, due to the extent of tissue damage.
D. A sunburn:
A sunburn is an example of a first-degree burn. It occurs due to overexposure to ultraviolet (UV) radiation from the sun, leading to redness, pain, and mild swelling of the skin. First-degree burns affect only the outer layer of the skin (epidermis) and typically heal within a few days without significant scarring or blistering. Applying soothing lotions, staying hydrated, and avoiding further sun exposure can help manage sunburns.
Correct Answer is C
Explanation
The correct answer is C. Ablative. Ablative surgery involves the removal of a diseased or damaged part of the body, such as an amputation. In this case, the removal of the patient's right leg due to diabetes-related complications qualifies as ablative surgery.
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