Which of the following transfusion-transmitted viruses does not have an envelope?

Your patient is a 77-year-old male whose wife called for EMS because he began acting confused a few hours ago. The patient has high blood pressure and benign prostatic hypertrophy. The patient is agitated and does not understand why you are there. Your assessment reveals warm, moist skin; a heart rate of 72; a respiratory rate of 24; and a blood pressure of 142/88. The patient has diminished breath sounds over the right middle lobe with coarse rhonchi in the right lower lobe; his oxygen saturation is 89 percent on room air.. Which of the following is the most likely diagnosis?

A) Pulmonary embolism B) Congestive heart failure C) Pneumonia D) Emphysema

You are managing a patient with a large flail segment to the right lateral chest. As such, you should recognize that the immediate threat to life is:

A) rib fractures. B) infection. C) hypoxia. D) blood loss.