Introduction Trauma is a major public health problem with high disability, death, and societal cost Three peak times of death after trauma 50% within the first minutes of sustaining the injury caused by massive blood loss or neurologic injury 30% within hours of arrival to hospital most commonly from shock, hypoxia, or neurologic injury 20% within days to weeks following injury multi system organ failure and infection are leading causes Golden Hour period of time when life threating and limb threatening injuries should be treated in order to decrease mortality estimated 60% of preventable deaths can occur during this time ranging from minutes to hours Use of an airbag in a head-on collision significantly decreases the rate of closed head injuries facial fractures thoracoabdominal injuries need for extraction Psychological 50% incidence of PTSD after traumatic event involving orthopedic injuries females 4x more likely to develop PTSD 33% incidence of depression Evaluation Primary survey treat greatest threats to life first pelvic fractures can be life threatening if not intervened on by orthopedic surgeons brief history ABCDE's Airway includes cervical spine control Breathing and ventilation Circulation includes hemorrhage control and resuscitation (below) pregnant women should be placed in the left lateral decubitus position to limit positional hypotension Disability Exposure Secondary survey physical examination and updated history obtain indicated imaging studies Tertiary survey repeat physical examination and additional imaging as indicated when mental status has stabilized formal tertiary survey decreases chances of missed orthopedic inury Hemorrhagic Shock Classification & Fluid Resuscitation Hemorrhagic shock classification and fluid resuscitation Class % Blood loss HR BP Urine pH MS Treatment I < 15% (<750ml) Normal Normal > 30 mL/hr Normal Anxious Fluid II 15% to 30 (750-1500ml) > 100 bpm Normal 20-30 mL/hr Normal Confused, Irritable, combative Fluid III 30% to 40% (1500-2000ml) > 120 bpm Decreased 5-15 mL/hr Decreased Lethargic, irritable Fluid & blood IV > 40% (life threatening) (>2000ml) > 140 bpm Decreased negligible Dereased Lethargic, coma Fluid & blood Introduction average adult (70 kg male) has an estimated 4.7 - 5 L of circulating blood average child (2-10 years old) has an estimated 75 - 80 ml/kg of circulating blood Methods of Resuscitation fluids crystalloid isotonic solution blood options O negative blood (universal donor) Type specific blood Cross-matched blood transfuse in 1:1:1 ratio (red blood cells: platelets: plasma) Indicators of adequate resuscitation urine output 0.5-1.0 ml/kg/hr (30 cc/hr) serum lactate levels normal < 2.5 mmol/L, < 45 mg/dL most sensitive indicator as to whether some circulatory beds remain inadequately perfused gastric mucosal ph base deficit normal -2 to +2 Risk of transfusion risk of viral transmission following allogenic blood transfusion hepatitis B (HBV) has highest risk: 1 in 205,000 donations hepatitis C (HCV): 1 in 1.8 million donations human immunodeficiency virus (HIV): 1 in 1.9 million Non-hemorrhagic shock Cardiogenic shock the heart is unable to generate sufficient cardiac output Neurogenic shock hypotension and relative bradycardia from loss of sympathetic tone following spinal cord inury Septic shock vs. hypovolemic shock the key variable to differentiate septic shock and hemorrhagic shock is that systemic vascular resistance is decreased with septic shock and increased with hypovolemic shock Hypovolemic vs. Septic shock Hypovolemic shock Septic Shock Systemic Vascular Resistance Increased Decreased Key variable to differentiate Cardiac Output Decreased Increased Pulmonary Capillary Wedge Pressure Decreased Decreased Central Venous Pressure Decreased Decreased Mixed Venous Oxygen Decreased Increased Imaging Delay of fracture diagnosis is most commonly caused by failure to image extremity image any extremity with pain, crepitus, ecchymosis, deformity AP Chest mediastinal widening pneumothorax Lateral C-spine must visualize C7 on T1 not commonly utilized in lieu of increased sensitivity with cervical spine CT AP Pelvis pelvic ring further CT imaging should be delayed until preliminary pelvic stabilization has been accomplished acetabulum proximal femur CT Scan C-spine, chest, abdomen, pelvis often used in initial evaluation of trauma patient to rule out life threatening injuries Damage Control Orthopaedics (DCO) Definition/History definitive treatment delayed until physiology has improved popularized in 2000 replaced the 1980s philosophy of Early Total Care (ETC), the concept of fixing long bone fractures as soon as possible because patients were "too sick not to operate" ETC led to exacerbation of the "second-hit" in a subset of patients with hemodynamic instability, head, and/or chest injuries Involves staging definitive management to avoid adding trauma to patient during vulnerable period the decision to operate and surgical timing on multiple injured trauma patients remains controversial intra-operative hypotension increases mortality rate in patients with head injury Parameters that help decide who should be treated with DCO ISS >40 (without thoracic trauma) ISS >20 with thoracic trauma GCS of 8 or below multiple injuries with severe pelvic/abdominal trauma and hemorrhagic shock bilateral femoral fractures pulmonary contusion noted on radiographs hypothermia <35 degrees C head injury with AIS of 3 or greater IL-6 values above 500pg/dL Optimal time of surgery patients are at increased risk of ARDS and multisystem failure during the acute inflammatory window (period from 2 to 5 days characterized by a surge in inflammatory markers) therefore only potentially life-threatening injuries should be treated in this period including unstable pelvic fracture compartment syndrome fractures with vascular injuries unreduced dislocations traumatic amputations unstable spine fractures cauda equina syndrome open fractures Stabilization followed by staged definitive management to minimize trauma, initial stabilization should be performed and followed by staged definitive management includes initial pelvic volume reduction via sheet, pelvic packing, skeletal traction, binder, or external fixation if hemodynamically stable proceed with further imaging including CT chest, abdomen, pelvis if not hemodynamically stable consider exploratory laparotomy and/or pelvic angiography and embolization definitive treatment delayed for 7-10 days for pelvic fractures within 3 weeks for femur fractures (conversion from exfix to IMN) 7-10 days for tibia fractures (conversion from external fixation to IMN) Early Appropriate Care Definition/history identifies major trauma patients and definitively treats the most time-critical orthopaedic injuries while minimizing the secondary inflammatory response, guided by laboratory parameters of adequate resuscitation popularized in 2013 Parameters lactate of < 4.0 mmol/L pH ≥ 7.25 base excess ≥ -5.5 mmol/L Optimal time of surgery goal is to definitively treat spine, pelvis, femur, and acetabulum fractures within 36 hours of injury Outcomes decreased delay to surgery decreased complication rates increased hospital revenues main reason for delay to treatment with implementation of this protocol was surgeon decision
QUESTIONS 1 of 59 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 Previous Next Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ18.9) Which of the following statements about polytrauma and organ failure is most correct when comparing children to adults? QID: 212905 Type & Select Correct Answer 1 Adults have a more robust initial inflammatory response, affecting the pulmonary system first 29% (600/2061) 2 Adults have a dampened immune response, affecting all organ systems simultaneously 2% (49/2061) 3 Adults have a more robust initial inflammatory response, affecting all organ systems simultaneously 13% (266/2061) 4 Children have a more robust initial inflammatory response, affecting all organ systems simultaneously 49% (1001/2061) 5 Children have a dampened immune response, affecting the pulmonary system first 6% (129/2061) L 1 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ15.261) A 42-year-old man falls down a ravine while mountain biking, and is airlifted to a trauma center. Initial evaluation within one hour of injury reveals a temperature of 38.1 C, pulse rate of 119, blood pressure of 110/59, and bilateral femur and bilateral tibia shaft fractures. He has a GCS score of 15. The trauma surgeon follows standard precautions, and the patient has a negative CT Chest/Abdomen/Pelvis, after which he is sent to the floor to await surgical intervention the next day. Four hours later, a rapid response is called after his pulse is noted to be 140 and blood pressure is 88/50. Which statement best describes the patient's hemodynamic status from presentation onward? QID: 5946 Type & Select Correct Answer 1 The patient has likely lost about 20% of his total blood volume. 9% (163/1871) 2 The patient presented in Class II hemorrhagic shock and now is in Class III hemorrhagic shock. 85% (1586/1871) 3 This patient has a decompensation of his hemodynamic status and the radiologist likely missed a solid organ injury given his most recent parameters. 3% (63/1871) 4 The patient cannot go to the operating room for at least 24 hours. 1% (21/1871) 5 The patient's decline in blood pressure is likely due to cardiogenic shock 1% (15/1871) L 1 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ13.204) A 25-year-old man is brought in with a Glasgow Coma Scale score of 3 and is intubated in the field following a motor vehicle collision. He is found to have Grade IV liver and splenic lacerations as well as an open book pelvic fracture, bilateral open tibia fractures, a closed left forearm fracture, and a left femoral shaft fracture. Which of the following variables is the most predictive of mortality? QID: 4839 Type & Select Correct Answer 1 End tidal carbon dioxide = 47mmHg 3% (100/3792) 2 Hematocrit = 18.5 5% (174/3792) 3 Heart rate = 150 beats per minute 2% (86/3792) 4 Base excess = -12 mEq/L 86% (3254/3792) 5 Blood pressure = 90/50 mmHg 4% (149/3792) L 1 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ13.221) A previously healthy 22-year-old male presents to the hospital after a motor vehicle accident. His injuries include a closed head injury, flail chest, intra-abdominal bleed and right femoral shaft fracture. Which of the following conventional indicators would support the role for "damage control orthopaedics" as opposed to "early total care" in the clinical decision making process of his femur fracture management? QID: 4856 Type & Select Correct Answer 1 Lactate level = 1.9 mmol/L 27% (984/3651) 2 Fibrinogen = 1.1 g/dL 3% (101/3651) 3 Platelet count = 20,000 per mcL 54% (1963/3651) 4 Urine output = 50 cc/hr 3% (100/3651) 5 Base deficit = 2 mmol/L 13% (478/3651) L 5 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ12.252) A 36-year-old woman presents with a grade 3 open midshaft femoral shaft fracture as the result of a high-speed motor vehicle collision. Concomitant injuries include a high-grade splenic laceration requiring splenectomy as well as a subdural hematoma that requires monitoring and maintenance of cerebral perfusion pressure. After irrigation and debridement of the open fracture, which of the following is the most appropriate management of the femoral shaft fracture at this time? QID: 4612 Type & Select Correct Answer 1 Placement of antibiotic beads, wound closure and immobilization 1% (51/5104) 2 Reamed antegrade intramedullary nailing 7% (359/5104) 3 Unreamed antegrade intramedullary nailing 3% (134/5104) 4 Wound closure and Hare traction splint placement 1% (35/5104) 5 Placement of an external fixator 88% (4504/5104) L 1 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 5 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (SBQ12TR.60) A 23-year-old male arrives to the trauma bay after a motorcycle crash caused by a drive-by shooting. The patient is awake and alert and following commands. Vital signs include a blood pressure of 145/90 and a heart rate of 117bpm. Initial lactate is reported as 2.4 mmol/L. The patient has 2 rib fractures on the right with a clear chest radiograph. The patient is neurovascularly intact with a 4cm transverse wound over the medial ankle. Figures A, B and C exhibit his orthopaedic injuries. What is the most appropriate management? QID: 3975 FIGURES: A B C Type & Select Correct Answer 1 Irrigation, debridement and placement external fixator right ankle, external fixation femur and intramedullary fixation tibia 4% (92/2305) 2 Irrigation, debridement and placement external fixator right ankle, intramedullary fixation femur and tibia 60% (1388/2305) 3 Irrigation, debridement and placement external fixator right ankle, intramedullary fixation femur and external fixation tibia 8% (177/2305) 4 Irrigation, debridement and placement external fixator right ankle, femur and tibia 26% (589/2305) 5 Irrigation, debridement and external fixation right ankle and skeletal traction 2% (43/2305) L 3 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic (SBQ12TR.96) Interleukin-6 levels have been shown to be a reliable measure of which of the following? QID: 4011 Type & Select Correct Answer 1 Osteoporosis 1% (28/2055) 2 Severity of injury 72% (1480/2055) 3 Sarcomatous tumor burden 4% (79/2055) 4 Bone turnover 21% (441/2055) 5 Hyperparathyroidism 1% (17/2055) L 3 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic (SBQ12TR.95) A 42-year-old male sustains multiple abdominal injuries along with the fractures shown in Figures A and B. Which of the following factors is most useful to determine the patient's resuscitation and ability to undergo early definitive fixation of these two fractures? QID: 4010 FIGURES: A B Type & Select Correct Answer 1 Pulse pressure 3% (81/2731) 2 Respiratory rate 1% (33/2731) 3 Urine output 7% (188/2731) 4 Platelet count 1% (16/2731) 5 Base deficit 87% (2385/2731) L 2 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 5 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ12.18) A 36-year-old man sustains blunt chest trauma, an open right femur fracture, and a closed left tibia fracture following a high-speed MVC. Upon presentation to the emergency room, blood pressure is 80/40, HR 135, and urine output is .4 cc/kg/hr. Fluids and blood products are administered, and the patient is transferred to the ICU for further care. As an alternative to lactate and base deficit measurements, which of the following would best indicate adequate resuscitation has been achieved? QID: 4378 Type & Select Correct Answer 1 Systolic blood pressure > 120 6% (366/5747) 2 Heart rate between 60-100 16% (911/5747) 3 Urine output equals 0.4 cc/kg/hr 19% (1102/5747) 4 Gastric intramucosal pH of 7.4 56% (3206/5747) 5 Potassium between 3.5-4.5 2% (123/5747) L 4 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ11.132) A 20-year-old female presents following a motor vehicle collision with the injuries seen in Figures A and B. She was initially hypotensive and tachycardic however she now has stable vital signs following a 2 liter bolus of saline and 2 units of packed red blood cells. Which of the following would indicate that this patient has occult end-organ hypoperfusion and should be further resuscitated prior to definitive fixation? QID: 3555 FIGURES: A B Type & Select Correct Answer 1 Heart rate of 80 beats per minute 0% (20/4465) 2 Systolic blood pressure of 120 mmHg 0% (14/4465) 3 Base deficit of -1.8 mEq/L 9% (413/4465) 4 Serum lactate of 5 mmol/Liter 88% (3911/4465) 5 Urine output of 40ml/hour 2% (90/4465) L 1 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic (OBQ10.72) All of the following indicators of resuscitation may be within normal limits for a trauma patient that is in "compensated" shock EXCEPT: QID: 3160 Type & Select Correct Answer 1 Systolic blood pressure 3% (84/2496) 2 Urine output 7% (186/2496) 3 Heart rate 9% (230/2496) 4 Serum lactate 76% (1905/2496) 5 Mean arterial pressure 3% (81/2496) L 2 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic (OBQ10.211) All of the following are characteristic of end-stage septic shock EXCEPT? QID: 3304 Type & Select Correct Answer 1 Increased systemic vascular resistance 72% (1057/1462) 2 Decreased cardiac output 4% (57/1462) 3 Decreased pulmonary capillary wedge pressure 6% (85/1462) 4 Decreased central venous pressure 3% (41/1462) 5 Increased mixed venous oxygen saturation 15% (221/1462) L 1 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ09.237) A 34-year-old man is brought to the trauma bay following a motorcycle collision with a left femoral shaft fracture and an open right tibial plateau fracture. Radiographs are provided in figures A and B. He is proceeding to the operating room for an emergent splenectomy. The mean arterial pressure is 51 mmHg following 6 units of packed red blood cells as well as crystalloid replacement. Base deficit is 10 mmol/L. Neurosurgery is concerned for evolving subdural hematoma and is recommending serial head CT scans. Which of the following is the best immediate treatment option to address his fractures? QID: 3050 FIGURES: A B Type & Select Correct Answer 1 Irrigation and debridement of open tibia plateau fracture and traction stabilization of femur and tibia plateau fractures 6% (240/3855) 2 Irrigation and debridement with open reduction internal fixation of tibial plateau fracture and intramedullary nail fixation of femur fracture 0% (15/3855) 3 Irrigation and debridement with open reduction internal fixation of tibial plateau fracture and plate fixation of femur fracture 0% (6/3855) 4 Irrigation and debridement with external fixation of tibia plateau fracture and reamed intramedullary nail fixation of femur fracture 4% (166/3855) 5 Irrigation and debridement with external fixation of tibia plateau fracture and external fixation of femur fracture 88% (3407/3855) L 1 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 5 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ07.101) A 48-year-old male is involved in a motorcycle accident and arrives in the trauma bay in hypovolemic shock. He receives 6 units of packed red blood cells during his resuscitation. Which of the following viral microbes is he most at risk of transmission from the transfusions? QID: 762 Type & Select Correct Answer 1 HIV 2% (17/1041) 2 Staph Aureus 3% (36/1041) 3 Hepatitis A 3% (28/1041) 4 Hepatitis B 54% (564/1041) 5 Hepatitis C 38% (393/1041) L 4 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic This is an AAOS Self Assessment Exam (SAE) question. Orthobullets was not involved in the editorial process and does not have the ability to alter the question. If you prefer to hide SAE questions, simply turn them off in your Learning Goals. (SAE07HK.22) What is the most prevalent adverse event associated with allogeneic blood transfusion? QID: 5982 Type & Select Correct Answer 1 Clerical error leading to transfusion reaction 81% (568/700) 2 Anaphylactic reaction 13% (94/700) 3 HIV transmission 0% (3/700) 4 Hepatitis C transmission 2% (17/700) 5 Bacterial contamination leading to sepsis/shock 2% (15/700) L 1 Question Complexity E Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic (OBQ07.198) Residual end-organ hypoperfusion in a polytraumatized patient is shown by which of the following? QID: 859 Type & Select Correct Answer 1 Urine output of 0.8 mL/kg/hr 7% (81/1176) 2 SpO2 < 90% 1% (9/1176) 3 Platelet count < 80 1% (9/1176) 4 Base excess of 3.0 mEq/L 8% (92/1176) 5 Serum lactate of 4.5 mmol/L 83% (977/1176) L 1 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 5 Review Tested Concept Review Full Topic (OBQ07.93) During head-on motor vehicle collisions occurring at highway speeds, airbag-protected individuals have a decreased rate (as compared to non-airbag protected individuals) of all of the following EXCEPT: QID: 754 Type & Select Correct Answer 1 Severe closed head injury 8% (95/1146) 2 Facial fractures 18% (204/1146) 3 Splenic rupture 16% (181/1146) 4 Pelvic ring injuries 51% (582/1146) 5 Flail chest 7% (80/1146) L 4 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic (OBQ07.225) A 21-year-old second-trimester pregnant female arrives in the trauma bay with a closed head injury as well as an open ankle injury. During evaluation, what positioning is recommended to limit positional hypotension? QID: 886 Type & Select Correct Answer 1 Reverse Trendelenburg 5% (58/1152) 2 Trendelenburg 6% (70/1152) 3 Left lateral decubitus 78% (900/1152) 4 Right lateral decubitus 6% (71/1152) 5 Supine 4% (47/1152) L 2 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic (OBQ07.171) Which of the following factors has been shown to increase mortality in poly-trauma patients with severe head injuries? QID: 832 Type & Select Correct Answer 1 Delayed fixation of fractures 9% (110/1223) 2 Decreased intracranial pressure 5% (56/1223) 3 Intra-abdominal injury 9% (106/1223) 4 Intra-operative hypotension 74% (906/1223) 5 Decreased platelet count 3% (39/1223) L 1 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic (OBQ05.38) A 30-year-old man sustains a head injury as well as femur and pelvis fractures as the result of a rollover motor-vehicle accident. He is initially comatose, but recovers cognitive function after 10 days in the hospital. Soon after awakening he complains of wrist pain and an x-ray demonstrates a distal radius fracture. What is the most likely explanation for this delayed diagnosis? QID: 75 Type & Select Correct Answer 1 wrist x-ray not initially obtained 97% (1133/1169) 2 x-ray obtained, but MRI necessary for diagnosis not obtained 0% (5/1169) 3 forearm x-ray initially obtained did not show fracture 1% (10/1169) 4 CT initially performed, but no 3-D images reconstructed 1% (8/1169) 5 wrist x-ray initially obtained did not show fracture 1% (8/1169) L 1 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic (OBQ05.238) Which of the following is indicative of a patient who has been successfully resuscitated following a trauma? QID: 1124 Type & Select Correct Answer 1 Urine output of 0.25 mL/kg/hour 7% (183/2652) 2 Lactic acid of 1.9 mmol/L 79% (2096/2652) 3 Base deficit of 5.5 7% (175/2652) 4 Gastric mucosal pH of 6.5 6% (148/2652) 5 Pulse pressure of 15 2% (41/2652) L 2 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic (OBQ04.141) Which of the following percentages of normal circulating blood loss would first result in a patient with tachycardia and a narrowed pulse pressure? QID: 1246 Type & Select Correct Answer 1 5% 1% (12/2375) 2 10% 11% (273/2375) 3 25% 66% (1563/2375) 4 40% 20% (477/2375) 5 50% 2% (44/2375) L 1 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic (OBQ04.170) A 34-year-old male sustains the injury seen in Figure A after being struck by a truck while crossing the street. Upon arrival in the trauma bay, he is initially tachycardic and hypotensive, but after application of a pelvic sheet and administration of intravenous fluids, his vitals normalize. Radiographs of his neck, chest, and pelvis are then obtained after pelvic sheeting; his new pelvis radiograph is shown in Figure B. Which of the following is the most appropriate next step? QID: 1275 FIGURES: A B Type & Select Correct Answer 1 CT scan of chest, abdomen, pelvis 84% (1577/1880) 2 Immediate sheet removal in exchange for a pelvic binder for added stability 3% (52/1880) 3 Immediate external fixator placement in the emergency room 4% (75/1880) 4 Pelvic arterial embolization 4% (80/1880) 5 Definitive open reduction internal fixation 5% (86/1880) L 2 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic (OBQ04.80) A 27-year-old female sustains injuries to the left femur and ipsilateral tibia shown in Figures A and B following an ATV accident. Her injury severity score (ISS) is 27 for her musculoskeletal and abdominal injuries. Her left limb is neurovascularly intact and there are no signs of compartment syndrome. What is the most appropriate definitive management? QID: 1185 FIGURES: A B Type & Select Correct Answer 1 Intramedullary nailing of the tibia and femur 81% (967/1192) 2 External fixation of the tibia and femur 13% (157/1192) 3 Balanced skeletal traction 0% (5/1192) 4 Circular external fixation of the tibia and intramedullary nailing of the femur 2% (29/1192) 5 Uniplanar external fixation of the tibia and intramedullary nailing of the femur 2% (28/1192) L 2 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic
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