| Question | Answer |
| What are some of the advantages of MDI? | Ref page 806
1.Inexpensive
2.Light,compact,resistant to moisture
3.Quick delivery of drugs
4.Precise and consistent doses
5.Available with most anti asthmatic drugs |
| What are some of the disadvantages of MDI? | Ref page 807
1.Difficulty in coordination of activation& inspiration
2.Time consuming to teach
3.Cold freon effect i.e. inability to continue to breathe when propellant is released into mouth |
| What is meant by priming the MDI? | Ref page 807
Activating a wasted dose to fill the metering chamber; used for new inhalers and those that have not been used for >4 to 6 hours. The old dose may have evaporated |
| What patients can not use DPI? | Ref page: 815
Children under 5 and patients unable to generate a high air flow. They also may not work as well in high humidity environments |
| When should an MDI be activated for a ventilator patient? | Ref page 837:
Coordinate firing the MDI with the beginning of the ventilator inspiration |
| When using an MDI,how much time should you allow between actuations? | Ref page 813
Allow 30 to 60 seconds. |
| How does an atomizer differ from an SVN? | Ref page 816:
Atomizers don’t have baffles. They are usually powered by a hand-squeezed bulb. Because the particles are larger, the drug deposits in the upper airway. You might deliver a local anesthetic through an atomizer prior to bronchoscopy |
| True or False:DPI Require high inspiration flow>60/l/min | Ref page 813
True |
| What are some of the Advantages of a spacer? | Ref page 810-811
1.no need to activate coordination with inspiration
2. Increases drug deposition in the lungs [130%].
3. Reduces drug deposition in the mouth.
4.used in children with face mask
5.decreases the incidence of oral thrush |
| What are some of the characteristics of Jet Nebulizer? | Ref page 823
1.Cools during operation
2.Small aerosol particle size
3.Less expensive |
| In what part of the lung would like to deposit beta-adrenergic bronchodilator drugs? | REF PAGE 803
In the lower airways |
| What is “blow- by” technique used with infants? | Ref page 820:
Blow-by is directing the mist by the baby’s mouth and nose without direct application to the face via a mask. It is not very effective. |
| SVN dosages should be adjusted when delivered to an intubated patient by what amount? | Ref page 836:
Give 2 to 5 times the normal dose |
| What is the optimal flow rate and amount of solution to put in an SVN? | Ref page 817:
6 to 8 L/min |
| What are of the characteristics of Ultra sound nebulizers? | Ref page 824
1.Heats up during operation
2.Larger aerosol particle
3.More expensive
4.Less noise |
| What class of inhaled drugs requires that you always use a spacer or chamber? | Ref page 811
Corticosteroids to reduce oropharyngeal deposition |
| What is the aerosol output an ultra sound nebulizer is capable of delivering? | Ref page 824
0.2 to 1.0 ml/min |
| What are some of the hazards of aerosol therapy? | Ref page 805-806
1.Bronchospasm
2.Over hydration
3.Overheating of inspired gases
4.Delivery of contaminated aerosol
5.Tubing condensation draining into the airway |
| Why is particle size so important in aerosol therapy? | Ref page 803
The ability of aerosols to travel through the air, enter the airways, and deposit in the lung is largely based on particle size. |
