Which of the following factors cause the isothermic saturation boundary (ISB) to shift farther down into the airways?
1. Decreased ambient temperature
2. Increased tidal volume (VT)
3. Endotracheal intubation
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, and 3
ANS: D
The ISB shifts distally when a person breathes through the mouth rather than the nose; when he or she breathes cold, dry air; when the upper airway is bypassed (breathing through an artificial tracheal airway); or when the minute ventilation is higher than normal.
You might also like to view...
Firefighters responding to an emergency in a water treatment facility should be aware that __________ and __________ are present and proper personal protective equipment should be worn
Fill in the blank(s) with correct word
After what age do the alveoli start to progressively deteriorate and enlarge?
A. 40 years B. 60 years C. 30 years D. 30 years
Adult glomerular filtration rates are reached by the time a baby is:
A. 2 to 3 months old B. 4 to 5 months old C. 6 to 12 months old D. 20 to 24 months old
The patient record documentation element that the health information manager can recommend to reduce risks to a health care facility is_____
A) The complete documentation of a patient's condition B) The documentation of errors as accurately as possible C) ensuring that record entries do not interrupt patient care D) omitting information that might result in a lawsuit