Patients with artificial heart valves placed more than two years ago do not require antibiotic premedication
A) True
B) False
B
Explanation: B) Patients with artificial heart valves are at risk of developing infective endocarditis. Antibiotic premedication is advised by the American Heart Association guidelines. The date of placement of the valve is not a factor in this determination.
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Two of the most likely technique errors include:
A) overexposure and poor positioning. B) density and contrast. C) overexposure and distortion. D) distortion and contrast
Which of the following groups of people is associated with the lowest risk of meningitis?
A. newborns B. females C. geriatrics D. children with shunts
At the scene of a motor vehicle accident, a car has extensive front-end damage and a deformed steering wheel. The restrained driver, who was self-extricated, is in the care of EMRs, who have applied a cervical collar and continue to maintain spine motion restriction precautions. The patient's airway is patent and respirations adequate. His radial pulse is rapid and weak, and his skin is cool and diaphoretic. The EMRs report the following vital signs: pulse, 136 beats/min; respirations, 20 breaths/min; blood pressure, 100/68 mmHg; and SpO2, 95% with supplemental O2 being administered. The right forearm is deformed, and the head, chest, and upper back are uninjured according to your assessment. Your next action would be to:
A) Start positive pressure ventilation B) Repeat the vital signs C) Change the nonrebreather mask to a nasal cannula D) Check the abdomen for injury
A single, large exposure made to a cold anode could result in:
cracked anode tube overload blown transformer vaporization of the filament