Q: One of the major reasons for 'asynchrony' between a patient and a mechanical ventilator is? (select one)
A) Increasing tidal volume (TV) with an increased flow rate
B) Increasing tidal volume (TV) without an increased flow rate
Answer: B
One common mistake done by novices is to increase only the tidal volume in an attempt to increase minute ventilation to adjust for respiratory acidosis. This results in prolonged inspiratory time manifested as asynchrony. Ideally, the inspiratory flow rate should also be increased whenever the tidal volume is increased.
#ventilators
#pulmonary
References:
1. Vieillard-Baron A, Prin S, Augarde R, et al. Increasing respiratory rate to improve CO2 clearance during mechanical ventilation is not a panacea in acute respiratory failure. Crit Care Med 2002; 30:1407.
2. Tobin MJ, Jubran A, Laghi F. Patient-ventilator interaction. Am J Respir Crit Care Med 2001; 163:1059.
3. Manning HL, Molinary EJ, Leiter JC. Effect of inspiratory flow rate on respiratory sensation and pattern of breathing. Am J Respir Crit Care Med 1995; 151:751.
A) Increasing tidal volume (TV) with an increased flow rate
B) Increasing tidal volume (TV) without an increased flow rate
Answer: B
One common mistake done by novices is to increase only the tidal volume in an attempt to increase minute ventilation to adjust for respiratory acidosis. This results in prolonged inspiratory time manifested as asynchrony. Ideally, the inspiratory flow rate should also be increased whenever the tidal volume is increased.
#ventilators
#pulmonary
References:
1. Vieillard-Baron A, Prin S, Augarde R, et al. Increasing respiratory rate to improve CO2 clearance during mechanical ventilation is not a panacea in acute respiratory failure. Crit Care Med 2002; 30:1407.
2. Tobin MJ, Jubran A, Laghi F. Patient-ventilator interaction. Am J Respir Crit Care Med 2001; 163:1059.
3. Manning HL, Molinary EJ, Leiter JC. Effect of inspiratory flow rate on respiratory sensation and pattern of breathing. Am J Respir Crit Care Med 1995; 151:751.
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