A patient is covered with hives. He is responsive to painful stimuli but has labored respirations with an inspiratory stridor sound, bilateral wheezing, and a weak and rapid pulse. His vital signs are pulse, 128; respirations, 24 breaths/min; and blood pressure, 80/50 mmHg. Given this presentation, the EMT should suspect that the patient has:
A) Sensitization
B) Anaphylaxis
C) Hypersensitivity
D) Localized allergic reaction
B) Anaphylaxis
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In a patient experiencing a myocardial infarction, a medication that reduces afterload is beneficial because it:
A) reduces the workload of the heart, reducing myocardial oxygen consumption. B) reduces the blood flow to unnecessary areas, redirecting blood to the heart. C) improves the stroke volume of blood ejected from the heart by also reducing preload. D) prolongs the Q-T interval, thereby allowing time for complete atrial contribution to the ventricles.
The rate of mucociliary transport in the normal peripheral airway is approximately
a. 0.5 mm/min. b. 1.5 mm/min. c. 5.0 mm/min. d. 21.5 mm/min.
For an adult horizontal or vertical molar bitewing, align the film packet so that the anterior edge lines up:
a. behind the distal half of the first premolar. b. behind the distal half of the second premolar. c. in front of the mesial half of the first premolar. d. in front of the mesial half of the second premolar.
With the lateral knee projection, off-centering can cause the same effects as off-angling.
Answer the following statement true (T) or false (F)