Chapter 35: Humidity and Bland Aerosol Therapy

Chapter 35: Humidity and Bland Aerosol Therapy

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. What is the point in the respiratory track where inspired gas reaches body temperature, ambient pressure, saturated (BTPS) conditions?

ANS:  D

As inspired gas moves into the lungs, it achieves BTPS conditions (body temperature, 37° C; barometric pressure; saturated with water vapor [100% relative humidity at 37° C]). This point, normally approximately 5 cm below the carina, is called the isothermic saturation boundary.

DIF:    Recall             REF:   p. 819            OBJ:   1

2. Which of the following is FALSE about the isothermic saturation boundary (ISB)?

ANS:  C

This point, normally approximately 5 cm below the carina, is called the isothermic saturation boundary (ISB). Above the ISB, temperature and humidity decrease during inspiration and increase during exhalation.

DIF:    Recall             REF:   p. 819            OBJ:   1

3. Which of the following factors cause the isothermic saturation boundary (ISB) to shift farther down into the airways?
4. decreased ambient temperature
5. increased tidal volume (V_T)
6. endotracheal intubation

ANS:  D

The ISB shifts distally when a person breathes through the mouth rather than the nose; when he or she breathes cold, dry air; when the upper airway is bypassed (breathing through an artificial tracheal airway); or when the minute ventilation is higher than normal.

DIF:    Recall             REF:   p. 819            OBJ:   1

4. What is the primary goal of humidity therapy?

ANS:  B

The primary goal of humidification is to maintain normal physiological conditions in the lower airways.

DIF:    Recall             REF:   p. 819            OBJ:   3

5. Indications for warming inspired gases include all of the following except:

ANS:  D

See Box 35-1.

DIF:    Recall             REF:   p. 820            OBJ:   2