Regarding pulmonary blood flow in the upright lung, which of the following statements is true?
a. The apexes receive approximately 20 times more blood flow than the bases.
b. The bases receive approximately 20 times more blood flow than the apexes.
c. The greatest blood flow is found at the apexes of the lungs.
d. The pulmonary circulation is a high-pressure system.
ANS: B
Farther down the lung, perfusion increases linearly in proportion to the hydrostatic pressure so the lung bases receive nearly 20 times as much blood flow as do the apexes.
You might also like to view...
A 4-year-old female patient with a decreased level of consciousness is in respiratory distress. Her airway is patent and respirations are 12 per minute. Breath sounds are diminished bilaterally, and there is noted accessory muscle use with inspiration and expiration. Her pulse is 84 and SpO2 88%. What should be your immediate action?
A) Recheck the SpO2 on another finger B) Start positive pressure ventilation C) Apply CPAP D) Initiate immediate transport to the hospital
Dehydration is always a chronic condition
Indicate whether the statement is true or false
Good hygiene for hand washing procedures involves massaging soapy hands, forearms, and elbows for at least how many seconds?
A) 30 B) 15 C) 20 D) 10
What is the correct code assigned for a patient with bulimia?
A. F50.2 B. F50.9 C. F50.8 D. F50.00