A 5'2" female patient with normal lungs has been intubated and requires mechanical ventilation with volume-controlled continuous mandatory ventilation (VC-CMV).The tidal volume (Vᴛ)and ventilator rate settings that should be recommended for this patient are which of the following?
A) Vᴛ = 315 mL, rate = 20 breaths/min
B) Vᴛ = 364 mL, rate = 14 breaths/min
C) Vᴛ = 468 mL, rate = 12 breaths/min
D) Vᴛ = 563 mL, rate = 10 breaths/min

Question

Quizplus · Accepted Answer

First calculate ideal body weight (IBW)for a female,which is 105 + 5(ht - 60)= 52 kg.Then using the range of 5-7 mL/kg IBW the tidal volume range for this patient is 260-364 mL.Minute ventilation is about 100 mL/kg IBW.Therefore,minute ventilation should be approximately 5.2 L/min.Then dividing the calculated minute ventilation by the tidal volume range for this patient provides a range of rates for the tidal volumes: 14-20 breaths/min depending on the set volumes.The most appropriate volume and rate combination for this patient is 364 mL × 14 breaths/min = 5.1 L/min.

A 5'2" Female Patient with Normal Lungs Has Been Intubated