Aerosol Flashcards
Aerosol
A. Water particles suspended in air B. Particulate water in a gas C. Must D. Fog E. Stability
What is ability of particles to remain stable suspended in a gas
Stability of an aerosol
Factors affecting stability
- Concentration
a. Number of particles
b. More particles bump together - Size
a. Large particles rain out - Relative humidity
a. Low relative humidity of the gas causes particles to evaporate
Depth of tracheobronchial tree that a particle reaches
Penetration
Particles rain out at a particular area
Deposition
Factors influencing penetration and deposition
A. Gravity
B. Kinetic Motion
C.Inertial Impaction
Factors influencing penetration and deposition: what is gravity
The larger the particles the more likely to deposit or rain out
Factors influencing penetration and deposition: What is Kinetic motion
The more particles move, the more likely to bump together, coalesce and rain out
Factors influencing penetration and deposition: inertial impaction
When airways narrow and alter direction,aerosol particle may continue on their same path and deposit by bumping into airway walls
Ventilators Pattern
- Alterable factor influencing deposition and retention
2. Ideal patterns slow,deep breath with a inspiratory hold
What adds liquid water to lung
Aerosol
a. Must be cleared to avoid accumulation
What are the clearance methods
A. Mobilization of mucous blanket B. Cough C. Lymphatic uptake D. Phagocytes E. Mechanical Suctioning
What are the indications of clearance
- To thin secretions
- To improve cough
- To deliver medications
- Humidification of artificial