A 73-year-old client is admitted to the pulmonology unit of the hospital. She was admitted with a pleural effusion and was "tapped" to drain the fluid to reduce her mediastinal pressure. How much fluid is typically present between the pleurae, which surround the lungs, to prevent friction rub?
a) No fluid normally is present
b) 5 - 15 ml
c) 15 - 25 ml
d) 20 - 30 ml
Answer: b) 5 - 15 ml
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