SterilizationPregunta 29 de 100
What is the fundamental difference between a gravity displacement cycle and a dynamic-air-removal (prevacuum) cycle?
a.Gravity relies on incoming steam to push air down and out the drain, while dynamic-air-removal uses vacuum pulses to actively pull air out before steam is admitted
b.Gravity operates at a lower temperature than any dynamic-air-removal cycle
c.Gravity uses saturated steam and dynamic-air-removal uses dry heat
d.Gravity requires a biological indicator while dynamic-air-removal does not
Explicación
In a gravity cycle, steam entering the chamber displaces cooler, heavier air downward through the drain, which is slower and less reliable for porous items and lumens. Dynamic-air-removal cycles mechanically evacuate air with vacuum pulses or steam flushes so steam contacts every surface almost immediately. Both cycles use saturated steam, both are monitored with biological indicators, and both can run at 270 degrees F.
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