Which of the Following Situations Would Be a Contraindication for Heat-Moisture

question 10

Multiple Choice

Which of the following situations would be a contraindication for Heat-Moisture Exchanger (HME) use to provide humidification to a mechanically ventilated patient?

• A) Body temperature of 34°C
• B) Inspired Vt 600ml, expired Vt 400 ml
• C) Spontaneous minute volume of 8 LPM
• D) a and b

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Definitions:

Cohesion

The force that holds molecules of the same substance together, contributing to the tensile strength of water.

Acid

Substance that releases hydrogen ions in water.

Base

Substance that accepts hydrogen ions in water.

Buffer

Set of chemicals that can keep the pH of a solution stable by alternately donating and accepting ions that contribute to pH.