A patient with pneumonia and underlying COPD is being mechanically ventilated in the VC-CMV mode with VT 650 mL. The resulting PaCO2 is 62 mm Hg. What change should be made to the VT to obtain a desired PaCO2 of 50 mm Hg for this patient?

You are caring for a 21-year-old woman who is apparently suffering from food poisoning. She has been forcefully vomiting for several hours and has begun to vomit a large amount of blood. What should you suspect?

A) Esophageal varices B) Peptic ulcer C) Esophagitis D) Mallory-Weiss tear

Which of the following is not a reason a patient may complain that a newly prescribed drug is not doing what the doctor told her it would? 

A. The dosage may need to be changed. B. The patient is not taking the medication as prescribed. C. The drug has reached therapeutic level. D. The wrong drug was dispensed. E. The drug is working, but the patient does not understand how it works.