What is the desired mass median aerodynamic diameter (MMAD) for the effective inhalation of an aerosolized bronchodilator?
A. less than 1 ?m
B. 1 ?m to 3 ?m
C. 3 ?m to 5 ?m
D. greater than 5 ?m
?ANS: C
A. Incorrect response: Particles smaller than 1 μm diameter reach deep into the tracheobronchial tree, but are commonly removed during exhalation without producing any effect. Particles this size do not significantly deposit on lung tissue to have any effect.
B. Incorrect response: Medications that are intended for penetration and deposition among the peripheral airways should have an MMAD of 1 μm to 3 μm diameter. Pentamidine is an example of such a medication.
C. Correct response: Medications that have their effects on the large- to medium-sized airways need to be in the range of 3 μm to 5 μm diameter. Bronchodilators need to be in this particle size range.
D. Incorrect response: Particles greater than 5 μm in diameter would not penetrate significantly into the respiratory tract.
You might also like to view...
A motorcyclist wearing a full helmet was thrown from his motorcycle after hitting a patch of oil. The bike had been traveling at a high rate of speed. Manual inline spinal stabilization is being held by an off-duty AEMT. The primary assessment reveals the patient to be responsive to painful stimuli and breathing rapidly. His radial pulse is weak and fast. As you quickly scan his body, you note
deformity to the left femur and lower leg. Your immediate action should be to: A) place a nonrebreather face mask. B) expose his left lower extremity. C) apply a cervical collar. D) remove his helmet.
Category I CPT codes are used to describe a procedure or service; in the code book, they are identified with a five-digit numeric code and descriptor
Indicate whether this statement is true or false.
Scarlett would like to work in a medical-related administrative field but is not interested in working in a medical office. Which of the following would offer the best choice of a career for Scarlett?
A. Education B. Education and home health sales C. Food management D. Home health sales
Although access to up-to-date computer systems is essential, what is the major barrier to setting up and maintaining health data in developing countries?
A. availability of trained staff B. money C. Internet access D. weather conditions