A victim of a high-speed car crash has a blood pressure of 80/50 mmHg and a heart rate of 135 bpm. His extremities are cool and clammy, and his neck veins are flat. Breath sounds are equal bilaterally. What is the most likely type of shock?

A 28-year-old patient undergoes damage control resuscitation for a pelvic fracture, receiving 12 units of packed red blood cells, 10 units of fresh frozen plasma, and 2 units of platelets. Two hours into resuscitation in the ICU, an ECG shows a heart rate of 110/min, a prolonged QT interval, and occasional ventricular ectopics. Which of the following metabolic disturbances is the most likely cause of these ECG findings?

A patient with a confirmed anterior cranial fossa fracture involving the cribriform plate presents with CSF rhinorrhea. Which associated neurological deficit is most likely to be found in this patient?

A 78-year-old male with a known chronic subdural hematoma presents with acute-on-chronic worsening of confusion and a new-onset right-sided hemiparesis. A repeat CT scan confirms a large, now symptomatic, hypodense collection. What is the most appropriate initial surgical intervention?

A 24-year-old male presents with a stab wound just superior to the medial clavicle. He is hypotensive with an expanding hematoma at the base of his neck. After initial resuscitation, he is taken to the operating room. Which surgical incision provides the best proximal control for the suspected vascular injury?

During an emergency laparotomy for a severe liver laceration, a surgeon encounters massive, pulsatile hemorrhage. A clamp is placed across the hepatoduodenal ligament (Pringle maneuver), but profuse venous bleeding from the depths of the liver fracture continues unabated. This finding strongly suggests an injury to which of the following structures?

A 55-year-old male presents with bilateral buttock claudication and erectile dysfunction. A CT angiogram confirms severe occlusive disease at the aortic bifurcation extending into the common iliac arteries. What is the most definitive surgical treatment for this condition?

A 65-year-old man presents with a chronic, shallow ulcer over the medial malleolus, surrounded by hyperpigmentation and induration. He has a history of untreated varicose veins. Incompetence of which venous structures is the most direct cause of this "gaiter area" ulceration?

A 65-year-old patient with a painful, indurated, and hyperpigmented gaiter area is examined. The skin is fibrotic and tethered, giving the leg an "inverted champagne bottle" appearance. This clinical sign is known as: