An alert and distressed 72-year-old male patient with a hist…

An alert and distressed 72-year-old male patient with a history of pulmonary edema from heart failure is in severe respiratory distress, breathing 28 to 32 times per minute. His airway is patent, respirations are labored, crackles are heard in the bases of the lungs, and skin is found to be diaphoretic with a rapid radial pulse. Other vital signs are pulse, 136; blood pressure, 202/110 mmHg; and SpO2, 83%. Cyanosis is evident in the fingertips. The best treatment for this patient’s breathing difficulty would be:

As you enter the living room of an adult patient who called…

As you enter the living room of an adult patient who called 911 for shortness of breath, you observe the patient sitting upright in a chair with a panicked look on her face, struggling to breathe, with obvious suprasternal retractions. Her breathing rate appears to be fast and her tidal volume poor. You can hear rhonchi from her lungs without the aid of a stethoscope. Once at her side, your initial care should be to: