A nurse is teaching a patient diagnosed with emphysema to use the pursed-lip method of breathing. The purpose of this method of breathing is to promote
oxygen intake
strengthening of the diaphragm and intercostal muscles
carbon dioxide elimination
mucus removal
The Correct Answer is C
A. Although pursed-lip breathing may indirectly aid oxygen intake by preventing airway collapse, its primary benefit is to help with carbon dioxide removal.
B. Pursed-lip breathing does not directly strengthen respiratory muscles; it primarily helps with breath control.
C. In emphysema, air trapping occurs due to loss of lung elasticity. Pursed-lip breathing helps slow exhalation, which creates back pressure and assists in expelling trapped carbon dioxide.
D. Mucus removal is more effectively facilitated by other techniques like controlled coughing; pursed-lip breathing focuses on prolonged exhalation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Bleeding in the brain could cause neurological symptoms but does not directly correlate with the respiratory acidosis indicated by the ABGs.
B. Anxiety typically leads to respiratory alkalosis due to hyperventilation, which does not align with the results showing acidemia.
C. The ABG results indicate a primary respiratory acidosis (low pH and elevated PCO2), which can occur in kidney failure due to the kidneys' inability to excrete acids and manage bicarbonate, leading to an accumulation of CO2.
D. Extreme vomiting is associated with metabolic alkalosis due to loss of gastric acid, which does not explain the acid-base disturbance presented.
Correct Answer is B
Explanation
A. An expiratory wheeze with a PCO₂ of 36 (within normal range) does not typically indicate respiratory failure.
B. A respiratory rate of 42 and a low oxygen saturation (SO₂) of 79% indicate hypoxemia and respiratory distress, which are hallmarks of respiratory failure.
C. A respiratory rate of 24 with a pH of 7.46 suggests mild hyperventilation or anxiety rather than respiratory failure.
D. A barking cough and a PO₂ of 90 are not indicative of respiratory failure; PO₂ of 90 is within normal limits.
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