Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
|
What is Hypoxic Vasoconstriction (HPV)?
|
A Reflex intrapulmonary feedback mechanism in inhomogeneous lungs to improve gas exchange and arterial oxygenation.
|
|
|
What is the difference between central hypoxemia and pulmonary hypoxemia?
|
In central hypoxemia vasodilation occurs in the general circulation it has the opposite effect on pulmonary arteries.
|
|
|
What efffect does HPV have on one-lung ventilation?
|
HPV:
1. decreases the cardiac output to the nonventilated lung from 40% (lateral position) to 20% to 25%. 2. Shunt flow increases from 10% to 27% 3. PaO2 decreases from >400mmHg to <200 mmHg |
