A client receiving mechanical ventilation has a pH of 7.26, PaCO2 of 68 mm Hg, and a PaO2 of 92 mm Hg. Which intervention should the nurse implement?Reference Range:
Arterial Blood Gas (ABG)
pH [Adult/child: 7.35 to 7.45]
PaCO2 [Adult/child: 35 to 45 mm Hg)
HCO- [Adult/child: 21 to 28 mEq/L (21 to 28 mmol/L)] PaO2 [Adult/child: 80 to 100 mm Hg)
Increase rate of ventilation.
Decrease expiratory flow time.
Increase ventilator tidal volume.
Decrease expiratory pressure.
The Correct Answer is A
Rationale
A. The client's pH is low (acidotic), and the PaCO2 is high (respiratory acidosis). Increasing the rate of ventilation (respiratory rate) can help to decrease PaCO2 by increasing alveolar ventilation, thereby helping to correct respiratory acidosis.
B. Expiratory flow time affects the time available for exhalation. While this may affect the overall mechanics of ventilation, it is not directly targeting the primary issue of elevated PaCO2 and acidosis.
C. Increasing tidal volume increases the volume of air delivered with each breath. This can improve ventilation efficiency but may not address the underlying problem of elevated PaCO2 unless it leads to increased minute ventilation.
D. Expiratory pressure is related to positive end-expiratory pressure (PEEP), which helps maintain alveolar recruitment and improve oxygenation. Decreasing expiratory pressure may not directly address the elevated PaCO2 and acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale
A. This option may seem reasonable, as dehydration and electrolyte imbalances are concerns in DKA. However, simply drinking electrolyte fluids without addressing the underlying cause of DKA (which is insulin deficiency) would not effectively manage the condition.
B. Physical activity may exacerbate DKA if insulin levels are inadequate. It is important to stabilize blood glucose levels and manage DKA before engaging in physical activity.
C. In DKA, there is an absolute or relative deficiency of insulin, leading to hyperglycemia and ketosis. Regular insulin helps to lower blood glucose levels and inhibit further breakdown of fats into ketones, thereby correcting the metabolic imbalance associated with DKA.
D. Monitoring urine output is important in assessing hydration status, but it does not address the immediate need to manage DKA. This action alone would not correct the underlying cause of increased thirst in DKA.
Correct Answer is C
Explanation
Rationale
A. This client may require complex care related to liver disease and alcoholism, likely exceeding the scope of practice for a PN.
B. While this client requires specialized wound care and diabetes management, the tasks involved may be appropriate for a PN under RN supervision.
C. This client's care typically involves routine postoperative monitoring and interventions that are suitable for a PN under RN supervision.
D. This client requires specialized ostomy care and postoperative monitoring, which can generally be managed by a PN under RN supervision.
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