The use of a grid in mammography
a. improves radiographic quality.
b. increases patient exposure.
c. reduces scatter reaching the film.
d. all of the above
d. all of the above
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Which of the following statements best describes the function of proportional assist ventilation on the Covidien PB 840?
a. The percentage of the work done by the patient is adjusted by the ventilator moni-toring the work of breathing. b. The percentage of the work done by the ventilator is automatically reduced as the compliance and resistance is improving. c. The operator sets a percentage of the work of breathing that is done by the ventilator; the remainder of the work of breathing is done by the patient. d. The ventilator adjusts the amount of work done by the ventilator based on continu-ous monitoring of the partial pressure of end-tidal carbon dioxide and the oxygen saturation measured by pulse oximeter.
Which of the following health care disciplines should be involved in the care of a patient who is considered difficult to wean? 1. Physical therapy 2. Speech therapy 3. Social services 4. Occupational therapy
a. 1 and 2 only b. 2 and 3 only c. 1, 2, and 4 only d. 1, 2, 3, and 4