Which of the following criteria for weaning a patient with Guillain-Barré syndrome from me-chanical ventilation have shown to be predictive of weaning success?
1. VC greater than 18 ml/kg
2. Transdiaphragmatic pressures greater than 31 cm H2O
3. PImax greater than 30 cm H2O
4. Cardiac output above 2.0 L/min
a. 1 and 3 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 1, 2, 3, and 4
ANS: B
Weaning of patients with Guillain-Barré syndrome from mechanical ventilation is predicted by VC greater than 18 ml/kg, transdiaphragmatic pressure greater than 31 cm H2O, or a PImax greater than 30 cm H2O.
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