The nurse is performing a shift assessment on an elderly pat…

The nurse is performing a shift assessment on an elderly patient who is recovering after surgery for a hip fracture. The nurse notes that the patient is complaining of chest pain, has an increased heart rate and respiratory rate. The nurse further notes that the patient is febrile and hypoxic, coughing and producing large amounts of thick white sputum. The nurse recognizes that this is a medical emergency and calls for assistance, as she recognizes that this patient is likely demonstrating symptoms related to what?