A 57-year-old,5'3",165 lb female patient arrives in the open heart unit following coronary artery bypass surgery.The patient has a history of diabetes and no history of pulmonary disease.The most appropriate initial volume-controlled continuous mandatory ventilation (VC-CMV)settings are which of the following?

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First calculate ideal body weight (IBW)for a female,using the formula 105 + 5(ht - 60).This patient's IBW is 55 kg.Minute ventilation is about 100 mL/kg IBW,which would be 5.54 L/min.Since the patient is post-op,the tidal volume should be set to between 5 and 8 mL/kg with rates of between 10 and 20 breaths/min.This would make the appropriate tidal volume range 275-440 mL.This fact eliminates choices "A," "C," and "D." The positive end-expiratory pressure (PEEP)may also be too high for a post-op open heart patient in choices "A," "C," and "D."

A 57-Year-Old,5'3",165 Lb Female Patient Arrives in the Open Heart