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Flashcards in Humidity Deck (12)
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1
Q

Humidity

A

Water in gaseous state

2
Q

What is the amount of water vapor

A

Gas can

3
Q

Humidity is determined by

A

Temperature of gas & sometimes referred to as capacity

4
Q

When gas has reached its potential at that temperature?

A

Saturated

5
Q

Amount of water weight held in gas and expressed in mg/L

A

Absolute humidity

6
Q

What is the relative humidity equation

A

Absolute humidity divided by potential humidity x 100

7
Q

Facts of Alveolar gas

A
  1. 100% relative humidity
  2. At 37 C alveolar gas hold approximately 44 mg/L
  3. At 37 C and 100% R.H. the pressure exerted by water vapor is 47mmHg
8
Q

Amount of humidity in alveolar gas minus the amount of humidity inspired

A

Humidity Deficit

9
Q

Humidity supplied to inspired gas by nasopharyngeal and oropharyngeal passages

A

If not supplied by the nose,moisture will be taken from tracheal mucosal blanket which dries and thickens secretions

10
Q

Inadequate humidification can cause

A
  1. Decrease cilia activity
  2. Decrease movement of mucous
  3. Inflammation and necrosis of pulmonary epithelium
  4. Retention of secretions
  5. Bacterial culture media
  6. Atelectasis
  7. Pneumonia
11
Q

Indications for humidification

A
  1. To prevent dry gas from drying mucosa

2. To provide near body humidity when upper airway function is impaired or bypassed

12
Q

T or F Humidity adds moisture to the respiratory tract

A

True