Flashcards in Effects Intrapleural Pressure Deck (6)
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1
volume is inverse to
- pressure
2
during inspiration
- thoracic pressure decreases
= have a massive venous return to lung
- temporary pooling of blood during inspiration
- flow to the LA is decrease
- flow to the LV is also decrease
- decrease CO
- decrease BP by 10mm Hg
- increase HR phenomenon called paradoxical fall of blood pressure during inspiration
3
during expiration
inverse to inspiration
4
valsalva manuever
- squeezing lung
in the BEGINNING: decrease BP and increase HR
LATER: increase BP and decrease HR
END: decrease venous return to the lung due to decrease pressure gradient
decrease flow to the heart
decrease BP
increase HR causing fainting
5
positive end-expiratory pressure (PEEP)
- volume cycled most common
- is applied at the end of the expiratory cycle to decrease alveolar collapse
- goal is help the patient to empty his alveolus
6