When properly performed, mouth-to-mouth (expired air) ventilation provides approximately how much oxygen (O2)?
a. 20%
b. 16%
c. 12%
d. 30%
ANS: B
Exhaled air provides approximately 16% O2, which is sufficient to achieve an arterial O2 tension (PaO2) of between 50 and 60 mm Hg.
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All of the following define a cleft palate EXCEPT
a. A birth defect in which the two sides of the face fail to unite properly in the early stage of prenatal development. b. A cleft lip may occur only bilaterally. c. An incomplete cleft lip occurs when a bridge of skin connects the cleft and noncleft sides. d. Deformity of the nose usually accompanies a cleft lip in the form of distortion and displacement of the lower lateral nasal cartilage.
Which of the following conditions may be caused by lifting or moving packages that are very heavy?
a. Strains b. Osteoarthritis c. Muscular dystrophy d. Carpal tunnel syndrome
When evaluating PA projections of the skull for petrous ridge placement, if the petrous ridges are placed too low in the orbit which movement would correct the placement and bring the petrous ridges more superior in the orbit?
A. Head extension B. Head flexion
Any patient with special needs should be treated with
A) dignity. B) respect. C) caring. D) All of the above