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Resp 15
Aerosol Medication Definitions
Question | Answer |
---|---|
Aerosol | suspension of solid or liquid particles in gas |
Goals of aerosol | *drugs delivered directly to site of action * Therapeutic action with minimal side effects * Greater efficacy and safety |
MDI | Metered dose inhaler |
DPI | Dry powder inhaler |
SVN | Small volume nebulizer |
USN | ultrasonic nebulizer |
hand-bulb atomizer | nose spray |
vibrating mesh nebulizer | like the USN ultrasonic nebulizer |
Jet Nebulizer | gas powered directed through a restricted orifice (the jet) - incorporates baffles to decrease the number of large aerosol particles |
Peak flow | a small, hand held device used to monitor a person's ability to breath OUT |
Spacer | simple valueless extension |
Chamber | incorporates a valve resulting in higher resirable drug dosage (will have musical note if you breath to fast) |
LVN | Large volume nebulizer |
SPAG | Small particle aerosol generator |
instability | tendancy for particles to be removed from suspension |
penetration | refers to the maximum depth that suspended particles can be carried into the pulmonary tree by inhaled tidal air |
deposition | result of an aerosol's eventual instability; particles "fall out" on a nearby surface |
Retention | proportion of particles deposited within the respiratory tract |
clearance | removal, the fact that some particles are exhaled |
coalescene | two particles form one larger particle |
nebulizer | a device that generates aerosol of uniform size |
gravity | large particles are deposited before smaller particles |
physical nature of particle | some particles absorb water, become large and rain-out, while others evaporate, become smaller and are conducted further into respiratory tree. |
Hygroscopic | particles tend to absorb water from the resp tract, and become larger and rain out |
Hypertonic | particles add water, increase size, and decrease deposition to smaller airways |
hypotonic | particles lose water and increase deposition to small airways |
isotonic | solutions will remain fairly stable in size until they are deposited |
For maximal deposition | slow deep breath, inhale through an open mouth, end inspiration, pause, follow with a slow, complete exhaustion |