Chapter 32: Key for RSPT 1429 homework

Humidity and Bland Aerosol Therapy

Wet Words (Answers in Key Terms and glossary)
hygrometer, body, inspissated, humidifier heat, moisture, nebulizers
ultrasonic, piezoelectric

Meet the Objectives

1. In the upper respiratory tract, mainly the nose. P. 738
2. P. 738-739
A. Reduced ciliary motility
B. Increased mucous production
C. Increased airway irritability
D. Drying and thickening of secretions
3. 4L/min. P. 738
4. Patients with artificial airways such as endotracheal tubes. P. 739
5. P. 739 Table 32-1
Primary Secondary
A. Humidifying dry medical gases A. Managing hypothermia
B. Humidify when upper airway is B. Treat bronchospasm from cold air
6. P. 740
A Temperature (The most important variable)
B. Surface area
C. Time of contact
7. Oronasal oxygen delivery systems. P. 741
8. P. 741
A. 15-20 mg/L
B. 25%
9. A pop-off or pressure release P. 741
10. P. 742
A. Passover humidifiers can maintain humidification at high flow rates.
B. They also add little or no resistance to gas flow.
C. There are no aerosols produced.
11. P. 742
A. Condenser humidifier—On inspiration, air cools the condenser element. On exhalation, water from the warm air condenses onto the cool element. On the next inspiration, the air is warmed and humidified by the element.
B. Hygroscopic condenser humidifier—A low thermal conductivity element is impregnated with hygroscopic salt (calcium or lithium chloride). The salt plus the element capture heat and moisture. During inspiration, the moisture is returned to the gas without cooling.
C. Hydrophobic condenser humidifier—Uses a water-repellent element with a large surface area and low thermal conductivity. The element heats up on exhalation. On inspiration, the condenser element cools considerably, capturing water to add to the next breath. (These last two types are about equally efficient, but condensers can also provide...