Q:

Intracranial pressure tends to rise when

safaTerkawi
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2022-08-10
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 Intracranial pressure tends to rise when.

  1. Cerebral venous pressure rises.
  2. Forced expiration is made against a closed glottis.
  3. There is a bout of coughing.
  4. Cerebral blood flow increases.
  5. Arterial PCO2 falls below normal.
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safaTerkawi
2022-08-10
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A. True This distends intracranial veins and hence raises pressure within the cranium.

B. True This (Valsalva) manoeuvre raises cerebral venous pressure.

C. True This also raises cerebral venous pressure.

D. True The vasodilation raises the volume of blood within the cranium.

E. False This constricts cerebral vessels and reduces cerebral blood volume.

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