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mib1990 mib1990
wrote...
6 years ago
False-negative aspirations typically occur when a clinician has failed to develop adequate negative pressure with the thumb ring.
 
  A) True
  B) False
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wrote...
6 years ago
B
Explanation: B) False-negative aspiration occurs when a bevel is in contact with a vessel wall. The negative pressure retracts the vessel wall into the lumen of the needle, blocking the flow of blood through the needle into the cartridge.
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