Respiratory Therapy CRT Exam Questions

What is changed when a pat is on PV? - Change the set pressure increased or decreased to adjust Vt What equation is used to reduce PaCo2 on a pat vented with VC ventilation when the rate is needing to be changed due to volume being high enough? - Desired F= known F X PaCo2/desired PaCo2 What is the equation to find desired Vt in VC ventilation? - Desired Vt= known Paco2 X Known Vt/desired PaCo2 What is increased to increase Vt with a PVC time cycled ventilation? - With pressure control ventilation PCV the set pressure is generally increased to obtain the targeted Vt. PCV is Time cycled If It is short increasing it will increase volume delivery without increasing pressure. What do you change if Vt and pressure plateu are already high to improve PaCo2? - frequancy