YW is a 23 year-old male student from Thailand studying electrical engineering at the university. He was ejected from a moving vehicle, which was traveling 70 mph. His injuries included a severe closed head injury with an occipitalhematoma, bilateral wrist fractures, and a right pneumothorax. During his neurologic intensive care unit (NICU) stay. YW was intubated and placed on mechanical ventilation, had a feeding tube inserted and was placed on tube feedings, had a Foley catheter to down drain (DD), and had multiple IVs inserted. He developed pneumonia 1 month after admission.

Question 1:Define the term primary head injury

A62-year-old man is being treated for an acute myocardial infarction. he originally came to the ed with substernal chest pain and diaphoresis. given his risk factors of hypertension, diabetes, tobacco use, and family history, he is considered high risk. an ecg in the ed reveals a left-bundle branch pattern, and cardiac enzymes are elevated slightly. after a focused evaluation in the ed, the patient receives iv thrombolytics. although his bundle branch pattern never resolves, the patient is chest pain-free and haemodynamically stable after thrombolysis. two days later, however, the patient reports episodes of recurrent chest discomfort and shortness of breath overnight. in evaluating for potential myocardial reinfarction, which of the following is the most appropriate diagnostic test? - creatinine kinase- dynamic ecg changes- lactate dehydrogenase- myoglobin levels- troponin i level