Answer to Question 1
D
D. Hyperinflation decreases the risk for atelectasis caused by negative pressure of suctioning Preoxygenation converts large proportion of resident lung gas to 100 oxygen to offset amount used in metabolic consumption while oxygenation is interrupted, as well as to offset volume lost during suction procedure.
A. Suctioning longer than 10 seconds can cause cardiopulmonary compromise, usually from hypoxemia or vagal overload.
B. If resistance is felt after insertion of catheter for maximum recommended distance, catheter has probably hit carina. Pull catheter back 1 to 2 cm before applying suction.
C. Application of suction pressure while introducing catheter into trachea increases risk of damage to mucosa and increases risk of hypoxia because of removal of entrained oxygen present in airways.
Answer to Question 2
D
D. Observe catheter tip for nicks, which can cause mucosal trauma.
A. Reduce the amount of suction pressure used.
B. Provide supplemental oxygen only if respiratory distress.
C. Reduction in frequency of suctioning is determined by the amount of secretion accumulation.
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