When you adjust the pressure drop necessary to trigger a breath on a ventilator, what are you ad-justing on the machine?
a. Sensitivity
b. Pressure limit
c. Mode setting
d. Positive end expiratory pressure (PEEP) level
ANS: A
Pressure triggering occurs when a patient's inspiratory effort causes a drop in pressure within the breathing circuit. When this pressure drop reaches the pressure sensing mechanism, the ventilator triggers on and begins gas delivery. On most ventilators, you can adjust the pressure drop needed to trigger a breath. The trigger level is often called the sensitivity.
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A) analgesics B) anxiolytics C) anticonvulsants D) anesthetics
Answer the following statement(s) true (T) or false (F)
1. Contrast medium is used to make anatomical structures within the body, not normally visible on an image, become visible. 2. Contrast medium does not cause allergic reactions. 3. Water-soluble iodinated contrast agents are more viscous than fat-soluble iodinated contrast agents. 4. The higher the atomic number of a tissue (bone), the more radiation absorption. 5. Barium, with an atomic number or Z of 56, is a negative contrast agent.