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Author Question: A patient in the intensive care unit who has a brain tumor has experienced a sharp decline. The ... (Read 64 times)

renzo156

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on: Jun 25, 2018
A patient in the intensive care unit who has a brain tumor has experienced a sharp decline.
 
  The care team suspects that water and protein have crossed the blood-brain barrier and been transferred from the vascular space into the client's interstitial space. Which of the following diagnoses best captures this pathophysiology?
  A)
  Focal hypoxia
  B)
  Cytotoxic edema
  C)
  Hydrocephalus
  D)
  Vasogenic edema

Question 2

Following a knee injury, a football player is taking ibuprofen, a nonsteroidal anti-inflammatory drug, for the control of pain.
 
  Which of the following drug actions is most likely to result in diminished sensation of pain for the player?
  A)
  The drug inhibits communication by third-order neurons between the thalamus and cerebral cortex.
  B)
  The drug inhibits the enzyme needed for prostaglandin synthesis.
  C)
  The drug changes the postexcitatory potential in C fibers, leading to pain sensitization.
  D)
  The drug slows the conduction velocity of myelinated A fibers in the pain pathway.


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lgoldst9

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Reply #1 on: Jun 25, 2018
Answer to Question 1

Ans:
D

Feedback:

Vasogenic edema occurs with conditions that impair the function of the blood-brain barrier and allow transfer of water and protein from the vascular into the interstitial space. It occurs in conditions such as tumors, prolonged ischemia, hemorrhage, brain injury, and infectious processes. Focal hypoxia is associated with localized delivery of blood with inadequate oxygen, and cytotoxic edema is an absolute increase in intracellular fluid. Hydrocephalus is an abnormal increase in CSF volume in any part or all of the ventricular system.

Answer to Question 2

Ans:
B

Feedback:

Analgesia can be achieved by inhibition of prostaglandin synthesis, as in the case of many NSAIDs. These drugs do not affect the function of third-order neurons, the action potential of C fibers, or the conduction velocity of A fibers.


renzo156

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Reply #2 on: Jun 25, 2018
Correct answers!


lgoldst9

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Reply #3 on: Jun 25, 2018
Great! Please up vote :D


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