Which of the following is true about the initial effects of an injection of epinephrine in local anesthetics?
a. It increases systolic blood pressure.
b. It decreases systolic blood pressure.
c. It increases diastolic blood pressure.
d. It has no effect on blood pressure.
a. After an injection of a local anesthetic containing EPI, there is stimulation of ?-receptors, which causes contraction of the blood vessels supplying the heart. After the EPI dosing decreases, there is stimulation of the ß2-receptors, which causes vasodilation of the blood vessels supplying the heart, resulting in a decrease in blood pressure.
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____ is a catch all term for a number of rhythms including idioventricular or agonal rhythms, ventricular escape rhythms, bradyasystolic rhythms, and pseudomechanical dissociation (EMD).
A. Unpalpable pulses B. Weak pulses C. Shallow pulses D. Pulseless electrical activity
Two different patients both have hemoglobins in the 5.0 to 6.0 g/dL range. One has pallor, fatigue, and headaches, whereas the other is experiencing life-threatening shock. Which of the following is probably the major difference between the two patients?
a. The morphologic classification of the anemia b. Whether other cell lines (platelets or white cells) are also involved c. The patient's sex d. How quickly the anemia developed
When ventilating an apneic adult patient with a bag-valve mask device, you must make sure that
A. an airway adjunct has been inserted. B. you are positioned alongside the patient. C. ventilations occur at a rate of 20 breaths/min. D. the pop-off valve on the BVM device remains open.
The Medicare limiting charge limits a nonparticipating provider to be able to charge what percent of the fee listed in the Medicare nonparticipating fee schedule?
A. 115 percent B. 5 percent C. 20 percent D. None of these are correct. they are paid the same.