Question

What conditions can decrease blood flow to the dependent lung during OLV?

1) High positive end-expiratory pressure (PEEP)
2) Low tidal volume
3) High inspiratory oxygen concentration
4) All of the above

Answer 1

High PEEP, low tidal volume, and high inspiratory oxygen concentration can all decrease blood flow to the dependent lung during OLV.

Step-by-step explanation:

All of the above conditions can decrease blood flow to the dependent lung during one-lung ventilation (OLV). High positive end-expiratory pressure (PEEP) can compress the vasculature in the dependent lung and reduce blood flow. Low tidal volume can lead to decreased ventilation and subsequently decreased blood flow. High inspiratory oxygen concentration can cause vasoconstriction in the dependent lung, further reducing blood flow.