单选题 The nurse is caring for a client who has a tracheostomy tube and is undergoing mechanical ventilation. The nurse can help prevent tracheal dilation, a complication of tracheostomy tube placement, by
A. suctioning the tracheostomy tube frequently.
B. using a cuffed tracheostomy tube.
C. using the minimal air leak technique with cuff pressure less than 25 cmH₂O.
D. keeping the tracheostomy tube plugged.

【正确答案】 C

【答案解析】To prevent tracheal dilation, a minimal-leak technique should be used and the pressure should be kept at less than 25 cmH₂O. Suctioning is vital but won't prevent tracheal dilation. Use of a cuffed tube alone won't prevent tracheal dilation. The tracheostomy shouldn't be plugged to prevent tracheal dilation. This technique is used when weaning the client from tracheal support.