Which of the following cardiovascular signs would indicate that a patient's cardiovascular status is unstable and that weaning should not begin at this time?
a. Cardiac index of 2.5 L/min/m2
b. Hemoglobin content of 10 g/dl
c. Heart rate of 108/min
d. Systolic blood pressure of 80 mm Hg
Q. 2 Which of the following indicate that a patient's renal function is adequate for weaning? 1. Urine output = 20 ml/hr 2. No major weight gain 3. No edema present 4. Normal electrolytes
a. 1 and 3 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 2, 3, and 4 only
Q. 3 Which of the following electrolyte imbalances can hinder weaning from ventilatory support? 1. Hypochloremia 2. Hypomagnesemia 3. Hypokalemia 4. Hyponatremia
a. 2 and 3 only
b. 1 and 2 only
c. 3 and 4 only
d. 1 and 4 only
Q. 4 Which of the following is false about the P0.1 measure?
a. P0.1 correlates well with central respiratory drive.
b. P0.1 is the airway pressure measured 100 msec after occlusion.
c. P0.1 is an effort-dependent measure of res-piratory drive.
d. Chronic obstructive pulmonary disease (COPD) patients with a P0.1 greater than 6 cm H2O are difficult to wean.
Q. 5 Which of the following signs observed on a mechanically ventilated patient indicate that suc-cessful weaning is unlikely?
1. Palpable scalene muscle use during inspiration
2. Palpable abdominal tensing during expiration
3. Presence of an irregular breathing pattern
4. Patient unable to alter breathing pattern on command
a. 2 and 4 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 1, 2, 3, and 4
Q. 6 A patient receiving ventilator support has a spontaneous rate of breathing of 26/min and an aver-age VT of 300 ml. What is this patient's rapid-shallow breathing index?
a. 12
b. 87
c. 105
d. 66
Q. 7 Successful weaning is less likely when a patient's work of breathing exceeds what level?
a. 4 J/min
b. 8 J/min
c. 12 J/min
d. 16 J/min
Q. 8 Which of the following indicate that an adult patient is ready to be weaned from ventilatory support? 1. VC = 1.9 L 2. Spontaneous rate of 32/min 3. Qs/Qt = 8 4. MIP = 45 cm H2O
a. 2 and 4 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 1, 3, and 4 only
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