Patient Data
The nurse has received the arterial blood gas (ABG) results.
Drag one condition and one client finding to complete the sentence(s). Based on the ABG values, the nurse knows that the client has
The Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"D"}
- Compensated respiratory acidosis occurs when the lungs retain CO₂, causing acidosis, but the kidneys compensate by increasing bicarbonate (HCO₃⁻) levels. In this case, the pH is low, and the PaCO₂ is within normal limits, which does not indicate a respiratory issue or compensation. Compensation would require an elevated HCO₃⁻, which is not provided in the lab results.
- Compensated metabolic acidosis would require a low pH with a decreased PaCO₂, as the respiratory system compensates by increasing ventilation (hyperventilation) to "blow off" CO₂. Since the PaCO₂ in this case is within normal limits, no significant respiratory compensation has occurred yet, making this uncompensated metabolic acidosis instead.
- Uncompensated respiratory acidosis would present with a low pH and an elevated PaCO₂ (>45 mmHg) due to inadequate ventilation and CO₂ retention. Since the PaCO₂ here is 37 mmHg (within normal range), respiratory acidosis is unlikely. The metabolic component, rather than a respiratory problem, is driving the acidosis.
- Uncompensated metabolic acidosis is characterized by a low pH (7.23) and a normal PaCO₂ (37 mmHg), indicating a primary metabolic problem without sufficient respiratory compensation. In diabetic ketoacidosis (DKA), the lack of insulin results in fat breakdown and ketone production, leading to a drop in pH and metabolic acidosis. This client likely has DKA due to their history of type 1 diabetes and the lack of insulin administration.
- Kussmaul respirations are a compensatory response to metabolic acidosis, seen in conditions like DKA. However, they do not cause acidosis; instead, they are the body's attempt to correct it by exhaling CO₂. Since the ABG shows normal PaCO₂, there is no strong evidence of hyperventilation, suggesting compensation has not yet occurred.
- Starvation can lead to ketoacidosis due to prolonged fasting and fat metabolism, producing ketones. However, in type 1 diabetes, the primary issue is no insulin production, not caloric deprivation. The severity of metabolic acidosis in this client is more likely due to insulin deficiency rather than starvation.
- Tissue hypoxia leads to lactic acidosis, which results from anaerobic metabolism. This can be seen in conditions like sepsis or shock. However, in this case, the client has type 1 diabetes, and the more likely cause of acidosis is ketoacidosis due to insulin deficiency rather than hypoxia.
- A lack of insulin in type 1 diabetes prevents glucose uptake, forcing the body to break down fat, leading to ketone formation and metabolic acidosis. This matches the clinical scenario of a patient with a history of type 1 diabetes, hyperglycemia >500 mg/dL, and metabolic acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Expel the excess air and heparin from the syringe. While removing excess air prevents gas exchange alterations, this is not the priority when obtaining an SVO₂ sample. Excess heparin could dilute the sample, but proper blood volume collection is the first concern.
B. Place sample in arterial blood gas syringe. SVO₂ measures venous oxygen saturation, which is different from arterial blood gases (ABGs). Using an ABG syringe is incorrect because it is heparinized for arterial sampling, and arterial blood does not reflect mixed venous oxygenation.
C. Obtain a minimum of 1 mL of blood. SVO₂ is measured from the distal lumen of a pulmonary artery (PA) catheter to assess oxygen delivery and consumption. At least 1 mL of blood is required for an accurate reading, ensuring sufficient sample volume for laboratory analysis.
D. Aspirate the blood sample slowly. While slow aspiration can help prevent hemolysis, it is not the primary concern when collecting an SVO₂ sample. The priority is obtaining a sufficient volume (≥1 mL) for an accurate measurement.
Correct Answer is C
Explanation
A. Place a cooling blanket on the client. A temperature of 100°F (37.8°C) is only mildly elevated and does not require active cooling. The priority concern is hemodynamic instability due to hypovolemia, not fever management. Cooling blankets are typically used for high fevers (≥ 102°F or 38.9°C).
B. Administer an antipyretic agent. While fever may indicate postoperative infection or inflammatory response, the client’s most critical issue is hypotension and low urine output, suggesting hypovolemia or early shock. Treating the underlying cause (fluid loss) is more urgent than giving an antipyretic.
C. Give a 500 mL IV fluid bolus challenge. The client has tachycardia (132 bpm), hypotension (88/65 mm Hg), and oliguria (10 mL/hour), all of which suggest hypovolemic shock, a common postoperative complication. A fluid bolus (typically 500–1000 mL of isotonic crystalloid such as normal saline or lactated Ringer’s) is the first-line treatment to restore intravascular volume, improve blood pressure, and increase urine output.
D. Titrate IV vasopressor for systolic less than 80. Vasopressors (e.g., norepinephrine) are not the first-line treatment for hypovolemic shock. Fluids should be administered first to correct volume loss before considering vasopressors. If hypotension persists despite adequate fluid resuscitation, vasopressors may be initiated.
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