The unit residence asked you to reduce the risk of contamination caused by condensation in the circuit of a mechanically ventilated patient. Which of the following would help to reduce or eliminate condensation in this patient's circuit?
a. Using a heat and moisture exchange (HME)
b. By draining the circuit on a daily basis
c. By not using any form of heater at all
d. By lowering the temperature in the heater
ANS: A
By replacing an active humidification system by a passive humidification one (HME), there will be less condensation in the circuit because no water is being used to heat and moisten the air, but instead the patient's own body heat is used. Draining the circuit daily, not using heat, or lowering the heater temperature is not acceptable and may place the patient at risk of infection caused by inspissated secretions among other consequences.
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