Which of the following does not cause an increase in the heart rate?
A. Strenuous exercise
B. Elevated body temperature
C. Parasympathetic nerve stimulation
D. Sympathetic nerve stimulation
E. Low concentration of potassium ions
C. Parasympathetic nerve stimulation
Parasympathetic nerve stimulation generally keeps the heart rate relatively low.
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The problem with a Le Fort fracture is that it may:
A) present an airway compromise. B) frequently be the cause of hypovolemia. C) have internal bleeding associated with it. D) all of the above
Which of the following represents the safe starting point for pressure support of a patient just placed on volume-controlled intermittent mandatory ventilation with the following set and measured parameters:
tidal volume, 475 mL; peak inspiratory pressure, 30 cm H2O; plateau pressure, 10 cm H2O; and flow rate, 45 L/min? a. 4 cm H2O c. 20 cm H2O b. 7 cm H2O d. 27 cm H2O
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
With respect to apparatus-mounted ladder raising, which term is used for decreasing the length and reach of the ladder by nesting fly sections?
A. Lower B. Retract C. Rotate D. Extend