A nurse is perfоrming а shift аssessment оn аn elderly patient whо sustained a proximal femur fracture. The nurse notes that the patient is complaining of chest pain, has an increased heart rate, and increased respiratory rate. The nurse further notes that the patient is febrile and hypoxic, with crackles and wheezes on auscultation. The nurse recognizes that this is a medical emergency and calls for assistance, recognizing that this patient is likely demonstrating symptoms of what complication?