Pulmonary Shunting

  1. 0 Can someone explain pulmonary shunting to me. I am reading a couple of articles on ARDS and they talk about pulmonary shunting, but without explanation. Is this just blood being shunted away from the areas of alveoli collapse to other areas of the lungs? If so, can that cause flash pulmonary edema or right-sided heart failure?

    Thanks,

    M
  2. Visit  mspringer profile page

    About mspringer

    Joined Sep '02; Posts: 66; Likes: 1.

    6 Comments so far...

  3. Visit  surferssoulmate profile page
    0
    Pulmonary shunting is blood that does not get any gas exchange at the alveolar level. It passes by the collapsed alveoli and is not able to complete the gas exchange. Think of it as a freeway with no exits (collapsed alveoli) - no place for the 02 to get off. When the alveoli are open and functional, the freeway has plenty of exit ramps for gas exchange. Pulmonary shunting will not cause flash pulmonary edema or right sided heart failure, but ARDS can. Hope this helps.
  4. Visit  mspringer profile page
    0
    Quote from surferssoulmate
    Pulmonary shunting is blood that does not get any gas exchange at the alveolar level. It passes by the collapsed alveoli and is not able to complete the gas exchange. Think of it as a freeway with no exits (collapsed alveoli) - no place for the 02 to get off. When the alveoli are open and functional, the freeway has plenty of exit ramps for gas exchange. Pulmonary shunting will not cause flash pulmonary edema or right sided heart failure, but ARDS can. Hope this helps.
    Thanks surfer girl! I like the analogy. Makes it easy to understand.
  5. Visit  Gompers profile page
    0
    I work in NICU, so I was wondering what they use in adult ICUs for this condition? We use nitric oxide on babies with good success.
  6. Visit  chaosRN profile page
    0
    This bring up an issue I don't quite understand. Why does high doses of Nipride cause pulmonary shunting? Is is because of the constriction to vessels & arteries?? People at work can't really explain it well, or I'm just not understanding.
  7. Visit  surferssoulmate profile page
    0
    Quote from Gompers
    I work in NICU, so I was wondering what they use in adult ICUs for this condition? We use nitric oxide on babies with good success.
    We use nitric on adults as well, at least once a month sometimes more.
  8. Visit  heart queen profile page
    0
    Nipride is a VERY potent venous and arterial vasodilator. It can potentiate Right to left shunting.
    Last edit by heart queen on May 16, '04

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