An AP axial sacral projection obtained with a perpendicular central ray demonstrates
1. an elongated sacrum.
2. the sacrum and symphysis pubis without alignment.
3. a foreshortened sacrum.
4. the symphysis pubis superimposed over the lower sacral segments.
a. 1 and 4 only
b. 2 only
c. 3 only
d. 3 and 4 only
C
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Solve (+3) + (-6) =
A. +9 B. +3 C. -9 D. -3
Normal inspiration is the result of:
A. diaphragmatic relaxation. B. air passively entering the lungs. C. negative pressure in the thoracic cavity. D. positive pressure in the thoracic cavity.
The defining characteristic of a junctional rhythm is the absence or abnormal:
a. P wave. b. QRS complex. c. ST segment. d. T wave.
You are ventilating a 40-year-old uninjured man who is apneic but has a pulse. When your partner reassesses his blood pressure, he notes that it has decreased significantly from previous readings. You elevate the patient's legs, but this action has no effect. You should:
A. reevaluate the rate and volume of your ventilations. B. perform a head-to-toe assessment to look for bleeding. C. increase the volume of your ventilations and reassess his blood pressure. D. ensure that you are delivering one breath every 3 to 5 seconds.