What form of nuclear imaging emits positrons, causing gamma rays to be discharged?
a. MRI
b. PET
c. Ultrasound
d. Fluoroscopy
ANS: B
Positron emission tomography (PET) is a form of nuclear imaging that combines elements of CT scanning and nuclear scanning to create a picture that represents the brain or other organs. The radioisotopes used emit positrons that cause pairs of gamma rays to be discharged and converted into images.
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1. What is true of allergic reactions triggered by dental anesthesia?
a. Although allergies to anesthesia are rare, if they do occur, the result is almost always anaphylaxis. b. Approximately 25 percent of reactions to dental anesthesia are considered true allergic reactions. c. Patients who are allergic to one type of anesthesia are usually allergic to almost all anesthetics. d. A common symptom of an allergic reaction to a dental anesthesia is pruritus.
The brain is surrounded by a tough and relatively inelastic membrane.
Answer the following statement true (T) or false (F)
An amputation of a body part is an example of ________
Fill in the blank with correct word.
____ appears to be of value in preventing intubation of the end-stage COPD patient and in supporting patients with chronic ventilatory failure.
A. CPAP B. SIMV C. VAPS D. BiPAP