A 27-year-old man presents to the emergency department with severe dyspnea and sharp chest pain that suddenly started an hour ago after he finished exercising. He has a history of asthma as a child, and he achieves good control of his acute attacks with Ventolin. On examination, his right lung field is hyperresonant along with diminished lung sounds. Chest wall motion during respiration is asymmetrical. His blood pressure is 105/67 mm Hg, respirations are 22/min, pulse is 78/min, and temperature is 36.7°C (98.0°F). The patient is supported with oxygen, given corticosteroids, and has had analgesic medications via a nebulizer. Considering the likely condition affecting this patient, what is the best step in management?
Q2
A 27-year-old man presents to the emergency department after he was assaulted and shot during a robbery. The patient was beaten with a baseball bat and has a bullet entry wound in his neck. He is currently complaining of diffuse pains but is able to speak. His voice sounds muffled, and he is requesting pain medications. An initial resuscitation is begun in the trauma bay. The patient's general appearance reveals ecchymosis throughout his body and minor scrapes and cuts, and possible multiple facial bone fractures. There is another bullet wound found in the left side of his back without an exit wound. Which of the following is the best next step in management?
Q3
A 52-year-old obese man is brought to the emergency department 30 minutes after he was involved in a high-speed motor vehicle collision. He was the unrestrained driver. On arrival, he is lethargic. His pulse is 112/min, respirations are 10/min and irregular, and blood pressure is 94/60 mm Hg. Pulse oximetry on room air shows an oxygen saturation of 91%. The pupils are equal and react sluggishly to light. He withdraws his extremities to pain. There are multiple bruises over his face, chest, and abdomen. Breath sounds are decreased over the left lung base. Two large bore peripheral venous catheters are inserted and 0.9% saline infusion is begun. Rapid sequence intubation is initiated and endotracheal intubation is attempted without success. Bag and mask ventilation is continued. Pulse oximetry shows an oxygen saturation of 84%. The patient has no advance directive and family members have not arrived. Which of the following is the most appropriate next step in the management of this patient?
Q4
A 15-year-old boy is brought to the emergency department one hour after sustaining an injury during football practice. He collided head-on into another player while wearing a mouthguard and helmet. Immediately after the collision he was confused but able to use appropriate words. He opened his eyes spontaneously and followed commands. There was no loss of consciousness. He also had a headache with dizziness and nausea. He is no longer confused upon arrival. He feels well. Vital signs are within normal limits. He is fully alert and oriented. His speech is organized and he is able to perform tasks demonstrating full attention, memory, and balance. Neurological examination shows no abnormalities. There is mild tenderness to palpation over the crown of his head but no signs of skin break or fracture. Which of the following is the most appropriate next step?
Q5
A 24-year-old man presents to the emergency department after a motor vehicle collision. He was in the front seat and unrestrained driver in a head on collision. His temperature is 99.2°F (37.3°C), blood pressure is 90/65 mmHg, pulse is 152/min, respirations are 16/min, and oxygen saturation is 100% on room air. Physical exam is notable for a young man who opens his eyes spontaneously and is looking around. He answers questions with inappropriate responses but discernible words. He withdraws from pain but does not have purposeful movement. Which of the following is this patient's Glasgow coma scale?
Q6
A 35-year-old male is brought into the emergency department for a trauma emergency. The emergency medical services states that the patient was wounded with a knife on his upper left thigh near the inguinal ligament. Upon examination in the trauma bay, the patient is awake and alert. His physical exam and FAST exam is normal other than the knife wound. Large bore intravenous lines are inserted into the patient for access and fluids are being administered. Pressure on the knife wound is being held by one of the physicians with adequate control of the bleeding, but the physician notices the blood was previously extravasating in a pulsatile manner. His vitals are BP 100/50, HR 110, T 97.8, RR 22. What is the next best step for this patient?
Q7
A 57-year-old man was brought into the emergency department unconscious 2 days ago. His friends who were with him at that time say he collapsed on the street. Upon arrival to the ED, he had a generalized tonic seizure. At that time, he was intubated and is being treated with diazepam and phenytoin. A noncontrast head CT revealed hemorrhages within the pons and cerebellum with a mass effect and tonsillar herniation. Today, his blood pressure is 110/65 mm Hg, heart rate is 65/min, respiratory rate is 12/min (intubated, ventilator settings: tidal volume (TV) 600 ml, positive end-expiratory pressure (PEEP) 5 cm H2O, and FiO2 40%), and temperature is 37.0°C (98.6°F). On physical examination, the patient is in a comatose state. Pupils are 4 mm bilaterally and unresponsive to light. Cornea reflexes are absent. Gag reflex and cough reflex are also absent. Which of the following is the next best step in the management of this patient?
Q8
A 36-year-old male is taken to the emergency room after jumping from a building. Bilateral fractures to the femur were stabilized at the scene by emergency medical technicians. The patient is lucid upon questioning and his vitals are stable. Pain only at his hips was elicited. Cervical exam was not performed. What is the best imaging study for this patient?
Q9
A 47-year-old man is brought to the emergency room by his wife. She states that they were having dinner at a restaurant when the patient suddenly became out of breath. His past medical history is irrelevant but has a 20-year pack smoking history. On evaluation, the patient is alert and verbally responsive but in moderate respiratory distress. His temperature is 37°C (98.6°F), blood pressure is 85/56 mm Hg, pulse is 102/min, and respirations are 20/min. His oxygen saturation is 88% on 2L nasal cannula. An oropharyngeal examination is unremarkable. The trachea is deviated to the left. Cardiopulmonary examination reveals decreased breath sounds on the right lower lung field with nondistended neck veins. Which of the following is the next best step in the management of this patient?
Q10
A 17-year-old boy is brought to the emergency department by his brother after losing consciousness 1 hour ago. The brother reports that the patient was skateboarding outside when he fell on the ground and started to have generalized contractions. There was also some blood coming from his mouth. The contractions stopped after about 1 minute, but he remained unconscious for a few minutes afterward. He has never had a similar episode before. There is no personal or family history of serious illness. He does not smoke or drink alcohol. He does not use illicit drugs. He takes no medications. On arrival, he is confused and oriented only to person and place. He cannot recall what happened and reports diffuse muscle ache, headache, and fatigue. He appears pale. His temperature is 37°C (98.6°F), pulse is 80/min, and blood pressure is 130/80 mm Hg. There is a small wound on the left side of the tongue. A complete blood count and serum concentrations of electrolytes, urea nitrogen, and creatinine are within the reference ranges. Toxicology screening is negative. An ECG shows no abnormalities. Which of the following is the most appropriate next step in management?
Primary survey (ABCDE) US Medical PG Practice Questions and MCQs
Question 1: A 27-year-old man presents to the emergency department with severe dyspnea and sharp chest pain that suddenly started an hour ago after he finished exercising. He has a history of asthma as a child, and he achieves good control of his acute attacks with Ventolin. On examination, his right lung field is hyperresonant along with diminished lung sounds. Chest wall motion during respiration is asymmetrical. His blood pressure is 105/67 mm Hg, respirations are 22/min, pulse is 78/min, and temperature is 36.7°C (98.0°F). The patient is supported with oxygen, given corticosteroids, and has had analgesic medications via a nebulizer. Considering the likely condition affecting this patient, what is the best step in management?
A. CT scan
B. ABG
C. Chest X-rays (Correct Answer)
D. Tube insertion
E. Sonogram
Explanation: ***Chest X-rays***
- The patient's presentation with **sudden onset dyspnea** and **sharp chest pain** post-exercise, along with **hyperresonance** and **diminished lung sounds** in the right lung field, is highly suggestive of a **spontaneous pneumothorax**.
- However, the patient is **hemodynamically stable** (BP 105/67, HR 78/min) with no signs of tension physiology (no severe hypotension, marked tachycardia, or cardiovascular collapse).
- In a stable patient with suspected pneumothorax, **chest X-ray is the appropriate first step** to confirm the diagnosis, determine the size of the pneumothorax, and guide subsequent management (observation for small pneumothorax <20%, aspiration, or tube thoracostomy for larger pneumothoraces).
- Immediate intervention without imaging is reserved for unstable patients with tension pneumothorax.
*Tube insertion*
- Chest tube insertion is the definitive treatment for large pneumothoraces (>20%) or hemodynamically unstable patients with tension pneumothorax.
- In this **stable patient**, proceeding directly to tube insertion without imaging confirmation would be premature and not following standard of care.
- The diagnosis should be confirmed and the size estimated via chest X-ray before determining if tube thoracostomy is necessary.
*CT scan*
- CT scan is not indicated as the initial diagnostic test for suspected pneumothorax.
- It provides more detail than needed for this clinical scenario and causes unnecessary delay and radiation exposure when chest X-ray is sufficient.
- CT may be useful for detecting small pneumothoraces not visible on X-ray or evaluating underlying lung disease, but is not the first-line test.
*ABG*
- An Arterial Blood Gas (ABG) might show hypoxia and respiratory alkalosis, providing information about gas exchange.
- However, ABG does not confirm the diagnosis of pneumothorax or guide immediate management decisions.
- It is an adjunctive test that does not take priority over diagnostic imaging in this scenario.
*Sonogram*
- Lung ultrasound can rapidly detect pneumothorax by showing absent lung sliding and is increasingly used in emergency settings, particularly for bedside evaluation.
- While potentially useful, **chest X-ray remains the standard initial imaging modality** for suspected pneumothorax in most emergency departments, as it provides clear documentation of pneumothorax size and is more universally available and interpreted.
- Ultrasound may be preferred in specific situations (unstable patients, point-of-care evaluation), but chest X-ray is the conventional first-line imaging test.
Question 2: A 27-year-old man presents to the emergency department after he was assaulted and shot during a robbery. The patient was beaten with a baseball bat and has a bullet entry wound in his neck. He is currently complaining of diffuse pains but is able to speak. His voice sounds muffled, and he is requesting pain medications. An initial resuscitation is begun in the trauma bay. The patient's general appearance reveals ecchymosis throughout his body and minor scrapes and cuts, and possible multiple facial bone fractures. There is another bullet wound found in the left side of his back without an exit wound. Which of the following is the best next step in management?
A. Administration of 100% oxygen
B. Laryngeal mask
C. Nasotracheal intubation
D. Orotracheal intubation (Correct Answer)
E. Cricothyroidotomy
Explanation: ***Orotracheal intubation***
- The patient's **muffled voice** suggests an impending **airway compromise** due to trauma, making securing the airway a priority.
- While other methods might be considered, **orotracheal intubation** is generally the quickest and most effective method for establishing a definitive airway in a trauma setting, especially given the potential for significant facial and neck injuries.
*Administration of 100% oxygen*
- Administering oxygen is an important initial step in trauma resuscitation, but it does not address the underlying problem of a **potentially compromised airway** in this patient.
- Oxygenation alone will not prevent future airway obstruction if swelling or hematoma progresses.
*Laryngeal mask*
- A laryngeal mask airway (LMA) is a **supraglottic device** that may not provide a definitive, secure airway, especially in a patient with potential cervical spine injuries or significant upper airway trauma where the anatomy may be distorted.
- LMAs are often considered a temporizing measure but not the primary choice for definitive airway management in patients with significant trauma.
*Nasotracheal intubation*
- **Nasotracheal intubation** is contraindicated in patients with **suspected facial or skull base fractures** due to the risk of intracranial intubation.
- The patient has possible multiple facial bone fractures, making this route unsafe.
*Cricothyroidotomy*
- **Cricothyroidotomy** is a surgical airway technique typically reserved for a "cannot intubate, cannot ventilate" situation when other attempts at intubation have failed.
- It is an invasive procedure and generally not the first line of airway management when conventional intubation is still feasible.
Question 3: A 52-year-old obese man is brought to the emergency department 30 minutes after he was involved in a high-speed motor vehicle collision. He was the unrestrained driver. On arrival, he is lethargic. His pulse is 112/min, respirations are 10/min and irregular, and blood pressure is 94/60 mm Hg. Pulse oximetry on room air shows an oxygen saturation of 91%. The pupils are equal and react sluggishly to light. He withdraws his extremities to pain. There are multiple bruises over his face, chest, and abdomen. Breath sounds are decreased over the left lung base. Two large bore peripheral venous catheters are inserted and 0.9% saline infusion is begun. Rapid sequence intubation is initiated and endotracheal intubation is attempted without success. Bag and mask ventilation is continued. Pulse oximetry shows an oxygen saturation of 84%. The patient has no advance directive and family members have not arrived. Which of the following is the most appropriate next step in the management of this patient?
A. Nasotracheal intubation
B. Video laryngoscopy
C. Cricothyrotomy (Correct Answer)
D. Comfort measures only
E. Tracheostomy
Explanation: ***Cricothyrotomy***
- In a trauma patient with **failed endotracheal intubation** and declining oxygen saturation (from 91% to 84% despite bag-mask ventilation), an emergent cricothyrotomy is indicated for **immediate airway control**.
- This procedure provides a definitive airway in a **can't intubate/can't ventilate** scenario, preventing further hypoxia and potential brain damage.
*Nasotracheal intubation*
- **Nasotracheal intubation** is generally contraindicated in patients with suspected **facial or skull base fractures** due to the risk of intracranial intubation.
- Given the high-speed collision and facial bruises, such fractures are possible, making this a less safe option compared to cricothyrotomy.
*Video laryngoscopy*
- While **video laryngoscopy** can be helpful for difficult airways, it was already implied that intubation was attempted and failed, suggesting the issue might be with visualization or access, not just technique.
- Critically, the patient's oxygen saturation is dropping rapidly, requiring a quicker, more definitive solution than another attempt at orotracheal intubation.
*Comfort measures only*
- The patient has **no advance directive**, and family members have not arrived to make decisions regarding end-of-life care.
- Despite the severity of his injuries, the patient is still alive and does not have clear indications for **comfort measures only** at this stage; resuscitative efforts are warranted.
*Tracheostomy*
- **Tracheostomy** is a surgical procedure for establishing a long-term airway and is not suitable for **emergent airway management** in a rapidly decompensating trauma patient.
- It typically requires specialized surgical expertise and takes longer to perform than a cricothyrotomy, which is a faster, life-saving measure in this acute situation.
Question 4: A 15-year-old boy is brought to the emergency department one hour after sustaining an injury during football practice. He collided head-on into another player while wearing a mouthguard and helmet. Immediately after the collision he was confused but able to use appropriate words. He opened his eyes spontaneously and followed commands. There was no loss of consciousness. He also had a headache with dizziness and nausea. He is no longer confused upon arrival. He feels well. Vital signs are within normal limits. He is fully alert and oriented. His speech is organized and he is able to perform tasks demonstrating full attention, memory, and balance. Neurological examination shows no abnormalities. There is mild tenderness to palpation over the crown of his head but no signs of skin break or fracture. Which of the following is the most appropriate next step?
A. Discharge without activity restrictions
B. Discharge and refrain from all physical activity for one week
C. Observe for 6 hours in the ED and refrain from contact sports for one week (Correct Answer)
D. Administer prophylactic levetiracetam and observe for 24 hours
E. Administer prophylactic phenytoin and observe for 24 hours
Explanation: ***Observe for 6 hours in the ED and refrain from contact sports for one week***
- This patient experienced a brief period of **confusion, headache, dizziness**, and **nausea** immediately after a head injury, which are symptoms consistent with a **mild traumatic brain injury (mTBI)** or **concussion**.
- Although his symptoms have resolved at presentation, observation in the ED for a few hours is prudent to ensure no delayed onset of more severe symptoms, and he should **refrain from contact sports** for at least one week as part of concussion management.
*Discharge without activity restrictions*
- Discharging without activity restrictions is unsafe given the initial symptoms of **confusion** and the potential for delayed symptom presentation or complications from a concussion.
- Concussion management requires a period of **physical and cognitive rest** to allow the brain to heal and prevent **second impact syndrome**.
*Discharge and refrain from all physical activity for one week*
- While refraining from all physical activity for one week is part of concussion management, discharging immediately without any observation period after initial neurological symptoms could be risky.
- An observation period allows for monitoring of any **worsening neurological signs** or symptoms that might indicate a more serious injury.
*Administer prophylactic levetiracetam and observe for 24 hours*
- **Prophylactic anticonvulsants** like levetiracetam are typically not recommended for routine management of **mild traumatic brain injury** or concussion.
- Their use is generally reserved for patients with more severe injuries, evolving conditions, or those who have had **seizures post-trauma**.
*Administer prophylactic phenytoin and observe for 24 hours*
- Similar to levetiracetam, **phenytoin** is an anticonvulsant and its prophylactic use is not indicated for **mild head injuries** or concussions.
- Anticonvulsant prophylaxis is associated with potential side effects and is reserved for specific high-risk scenarios, such as **severe TBI** or **penetrating head trauma**.
Question 5: A 24-year-old man presents to the emergency department after a motor vehicle collision. He was in the front seat and unrestrained driver in a head on collision. His temperature is 99.2°F (37.3°C), blood pressure is 90/65 mmHg, pulse is 152/min, respirations are 16/min, and oxygen saturation is 100% on room air. Physical exam is notable for a young man who opens his eyes spontaneously and is looking around. He answers questions with inappropriate responses but discernible words. He withdraws from pain but does not have purposeful movement. Which of the following is this patient's Glasgow coma scale?
A. 9
B. 15
C. 7
D. 11 (Correct Answer)
E. 13
Explanation: ***11***
- **Eye-opening (E)**: The patient opens his eyes spontaneously, scoring **E4**.
- **Verbal response (V)**: He gives inappropriate responses but discernible words, scoring **V3**.
- **Motor response (M)**: He withdraws from pain but does not have purposeful movement, scoring **M4**.
- Therefore, the total Glasgow Coma Scale (GCS) score is **E4 + V3 + M4 = 11**.
*9*
- This score would imply a lower verbal or motor response, such as **incomprehensible sounds (V2)** or **abnormal flexion (M3)**, which is not consistent with the patient's presentation.
- For example, E4 + V2 + M3 would equal 9.
*15*
- A GCS of 15 indicates **normal neurological function**, meaning the patient would be fully oriented, obey commands, and open eyes spontaneously, which is not the case here.
- This score is for a patient who is fully conscious and responsive.
*7*
- A GCS of 7 suggests a **severe brain injury**, which would typically present with a much poorer response, such as **no verbal response (V1)** or **abnormal extension (M2)**.
- For example, E4 + V1 + M2 would equal 7.
*13*
- This score would mean a higher level of consciousness, such as **confused conversation (V4)** or **localizing pain (M5)**, which is better than the patient's described responses.
- For example, E4 + V4 + M5 would equal 13.
Question 6: A 35-year-old male is brought into the emergency department for a trauma emergency. The emergency medical services states that the patient was wounded with a knife on his upper left thigh near the inguinal ligament. Upon examination in the trauma bay, the patient is awake and alert. His physical exam and FAST exam is normal other than the knife wound. Large bore intravenous lines are inserted into the patient for access and fluids are being administered. Pressure on the knife wound is being held by one of the physicians with adequate control of the bleeding, but the physician notices the blood was previously extravasating in a pulsatile manner. His vitals are BP 100/50, HR 110, T 97.8, RR 22. What is the next best step for this patient?
A. CT lower extremities
B. Radiograph lower extremities
C. Coagulation studies and blood typing/crossmatch
D. Tourniquet of proximal lower extremity
E. Emergent surgery (Correct Answer)
Explanation: ***Emergent surgery***
- The pulsatile bleeding from a thigh wound near the inguinal ligament is highly suggestive of a major arterial injury, such as to the **femoral artery**.
- Given the potential for rapid blood loss and hemodynamic instability, **emergent surgical exploration and repair** are necessary to control the bleeding and prevent further compromise.
*CT lower extremities*
- While CT angiography could further delineate vascular injury, the presence of **active pulsatile bleeding** necessitates immediate surgical intervention rather than delaying for imaging.
- Delaying surgery for imaging risks **exsanguination** and worsening patient outcomes, especially with a blood pressure of **100/50 mmHg** and a heart rate of **110 bpm**, indicating early shock.
*Radiograph lower extremities*
- A radiograph would primarily visualize bone structures and foreign bodies but would not provide adequate information regarding the **vascular injury** and active bleeding.
- It would not change the urgent need for **surgical exploration** to address the pulsatile hemorrhage.
*Coagulation studies and blood typing/crossmatch*
- These are important preparatory steps for major surgery involving significant blood loss, but they should be carried out **concurrently with preparations for emergent surgery**, not instead of it.
- Delaying surgery to await these results would be inappropriate when facing **active arterial bleeding**.
*Tourniquet of proximal lower extremity*
- While a tourniquet can be used for temporary hemorrhage control, especially in an uncontrolled external hemorrhage, the current bleeding is being controlled by **direct pressure**.
- Applying a tourniquet could cause **ischemic damage** to the extremity if applied for too long, and for a deep stab wound, direct compression is often effective until surgical control can be achieved.
Question 7: A 57-year-old man was brought into the emergency department unconscious 2 days ago. His friends who were with him at that time say he collapsed on the street. Upon arrival to the ED, he had a generalized tonic seizure. At that time, he was intubated and is being treated with diazepam and phenytoin. A noncontrast head CT revealed hemorrhages within the pons and cerebellum with a mass effect and tonsillar herniation. Today, his blood pressure is 110/65 mm Hg, heart rate is 65/min, respiratory rate is 12/min (intubated, ventilator settings: tidal volume (TV) 600 ml, positive end-expiratory pressure (PEEP) 5 cm H2O, and FiO2 40%), and temperature is 37.0°C (98.6°F). On physical examination, the patient is in a comatose state. Pupils are 4 mm bilaterally and unresponsive to light. Cornea reflexes are absent. Gag reflex and cough reflex are also absent. Which of the following is the next best step in the management of this patient?
A. Second opinion from a neurologist
B. Withdraw ventilation support and mark time of death
C. Electroencephalogram
D. Repeat examination in several hours
E. Apnea test (Correct Answer)
Explanation: ***Apnea test***
- The patient exhibits classic signs of **brain death**, including a **coma**, fixed and dilated pupils, and absent brainstem reflexes (corneal, gag, cough). The next step is to perform an apnea test to confirm the absence of spontaneous respiratory drive.
- An apnea test confirms brain death by demonstrating the **absence of respiratory effort** despite a rising pCO2, provided that spinal cord reflexes are not mistaken for respiratory efforts.
*Second opinion from a neurologist*
- While consulting a neurologist is often helpful in complex neurological cases, the current clinical picture presents such clear signs of brain death that **further confirmatory testing** for brain death (like the apnea test) is more immediately indicated before seeking additional opinions on diagnosis.
- A second opinion would typically be sought to confirm the diagnosis or guide management, but establishing brain death requires a specific protocol which is incomplete without the apnea test.
*Withdraw ventilation support and mark time of death*
- It is **premature to withdraw ventilation** before brain death is unequivocally confirmed by all necessary clinical and confirmatory tests, including the apnea test.
- Withdrawing support without full confirmation could lead to ethical and legal issues, as the patient might still have residual brainstem function, however minimal.
*Electroencephalogram*
- An **EEG** can show absent electrical activity, supporting brain death, but it is **not a mandatory part of the core brain death criteria** in many protocols, especially when clinical signs are clear and an apnea test can be performed.
- The primary diagnostic criteria for brain death usually prioritize clinical examination and the apnea test for proving irreversible cessation of all brain functions.
*Repeat examination in several hours*
- Repeating the examination in several hours is typically done if there are **confounding factors** (e.g., severe hypothermia, drug intoxication) that might mimic brain death, or if the initial assessment is incomplete.
- In this case, there are no mentioned confounding factors, and the immediate priority is to complete the brain death protocol with an apnea test, given the current clear clinical picture.
Question 8: A 36-year-old male is taken to the emergency room after jumping from a building. Bilateral fractures to the femur were stabilized at the scene by emergency medical technicians. The patient is lucid upon questioning and his vitals are stable. Pain only at his hips was elicited. Cervical exam was not performed. What is the best imaging study for this patient?
A. AP and lateral radiographs of hips
B. Lateral radiograph (x-ray) of hips
C. Magnetic resonance imaging (MRI) of hips, knees, lumbar, and cervical area
D. Anterior-posterior (AP) and lateral radiographs of hips, knees, lumbar, and cervical area
E. Computed tomography (CT) scan of cervical spine, hips, and lumbar area (Correct Answer)
Explanation: ***Computed tomography (CT) scan of cervical spine, hips, and lumbar area***
- In **high-energy trauma** (fall from height), a CT scan is the **gold standard** for evaluating the **spine and pelvis**, providing detailed cross-sectional images superior to plain radiographs.
- Since the **cervical exam was not performed**, cervical spine imaging is **mandatory** per ATLS (Advanced Trauma Life Support) protocols. High-energy falls carry significant risk of **cervical spine injury** even without obvious neurological symptoms.
- CT allows comprehensive assessment of **hip fractures, pelvic injuries, and the entire spine** (cervical, thoracic, lumbar), identifying both obvious and **subtle fractures** that may be missed on plain films.
- This approach provides the most **efficient and thorough evaluation** in the acute trauma setting, allowing for appropriate surgical planning and ruling out life-threatening spinal instability.
*AP and lateral radiographs of hips*
- Plain radiographs provide **limited detail** and may **miss subtle fractures**, particularly in complex areas like the pelvis and acetabulum.
- This option **fails to address cervical spine clearance**, which is essential in all high-energy trauma patients, especially when cervical exam has not been performed.
- Radiographs are insufficient for **comprehensive trauma evaluation** after a fall from height.
*Lateral radiograph (x-ray) of hips*
- A single lateral view is **grossly insufficient** for evaluating hip and pelvic fractures, providing only a **two-dimensional perspective** that can miss significant injuries.
- This option **completely neglects spinal evaluation**, which is dangerous in an uncleared trauma patient with a high-energy mechanism.
*Magnetic resonance imaging (MRI) of hips, knees, lumbar, and cervical area*
- While MRI excels at evaluating **soft tissues, ligaments, and bone marrow**, it is **not the initial imaging modality** for acute bony trauma due to longer scan times and lower sensitivity for acute fractures compared to CT.
- MRI is **time-consuming and impractical** in the emergency setting for initial fracture assessment, potentially delaying definitive treatment.
- CT is superior for evaluating **acute skeletal injuries** in the trauma bay.
*Anterior-posterior (AP) and lateral radiographs of hips, knees, lumbar, and cervical area*
- Multiple plain radiographs have **limited sensitivity** for complex or non-displaced fractures, particularly in the **spine and pelvis**, making them inadequate for high-energy trauma evaluation.
- Obtaining multiple radiographic views requires **numerous patient repositionings**, which risks further injury if **spinal instability** is present.
- Plain films provide significantly **less diagnostic information** than CT scanning for trauma assessment.
Question 9: A 47-year-old man is brought to the emergency room by his wife. She states that they were having dinner at a restaurant when the patient suddenly became out of breath. His past medical history is irrelevant but has a 20-year pack smoking history. On evaluation, the patient is alert and verbally responsive but in moderate respiratory distress. His temperature is 37°C (98.6°F), blood pressure is 85/56 mm Hg, pulse is 102/min, and respirations are 20/min. His oxygen saturation is 88% on 2L nasal cannula. An oropharyngeal examination is unremarkable. The trachea is deviated to the left. Cardiopulmonary examination reveals decreased breath sounds on the right lower lung field with nondistended neck veins. Which of the following is the next best step in the management of this patient?
A. Urgent needle decompression (Correct Answer)
B. D-dimer levels
C. Nebulization with albuterol
D. Chest X-ray
E. Heimlich maneuver
Explanation: ***Urgent needle decompression***
- The patient presents with sudden onset **respiratory distress**, **tracheal deviation** to the left (away from the affected right side), **decreased breath sounds** on the right, and **hypotension** with **tachycardia**. These are classic signs of a **tension pneumothorax**, which requires immediate needle decompression.
- This is a life-threatening emergency where air accumulates in the pleural space under positive pressure, collapsing the lung and shifting mediastinal structures, compromising venous return to the heart.
*D-dimer levels*
- While helpful in the workup for pulmonary embolism, **D-dimer levels** are not relevant as the immediate next step for a patient in acute respiratory distress with clear signs of tracheal deviation and decreased breath sounds, which points toward a mechanical lung issue.
- The patient's presentation with acute, severe respiratory symptoms and hemodynamic instability mandates immediate life-saving intervention.
*Nebulization with albuterol*
- **Albuterol** is used for bronchospasm, as seen in asthma or COPD exacerbations. This patient's symptoms are sudden and severe, with clear signs of a **tension pneumothorax**, which would not respond to bronchodilators.
- There is no indication of wheezing or a history of reactive airway disease to suggest this as a primary treatment.
*Chest X-ray*
- A **chest X-ray** would confirm the diagnosis of tension pneumothorax. However, given the patient's severe respiratory distress, hypotension, and classic physical findings (tracheal deviation, absent breath sounds), performing an X-ray would delay life-saving intervention.
- In a true tension pneumothorax, diagnosis is clinical, and immediate intervention takes precedence over imaging.
*Heimlich maneuver*
- The **Heimlich maneuver** is indicated for foreign body airway obstruction. The patient is verbally responsive, which indicates a patent airway, and there are no direct signs of choking on food.
- Although the patient was having dinner, the distinct clinical signs of **tracheal deviation** and unilateral decreased breath sounds do not support an airway obstruction requiring the Heimlich maneuver.
Question 10: A 17-year-old boy is brought to the emergency department by his brother after losing consciousness 1 hour ago. The brother reports that the patient was skateboarding outside when he fell on the ground and started to have generalized contractions. There was also some blood coming from his mouth. The contractions stopped after about 1 minute, but he remained unconscious for a few minutes afterward. He has never had a similar episode before. There is no personal or family history of serious illness. He does not smoke or drink alcohol. He does not use illicit drugs. He takes no medications. On arrival, he is confused and oriented only to person and place. He cannot recall what happened and reports diffuse muscle ache, headache, and fatigue. He appears pale. His temperature is 37°C (98.6°F), pulse is 80/min, and blood pressure is 130/80 mm Hg. There is a small wound on the left side of the tongue. A complete blood count and serum concentrations of electrolytes, urea nitrogen, and creatinine are within the reference ranges. Toxicology screening is negative. An ECG shows no abnormalities. Which of the following is the most appropriate next step in management?
A. Electroencephalography
B. Lumbar puncture
C. Lorazepam therapy
D. Reassurance and follow-up
E. CT scan of the head (Correct Answer)
Explanation: ***CT scan of the head***
- Given the **first-time seizure** in an adolescent, especially with a history of head trauma (falling while skateboarding) and subsequent confusion, a **CT scan of the head** is crucial to rule out acute structural lesions like hemorrhage, mass, or edema.
- It is vital for identifying **life-threatening causes** of seizure that require immediate intervention, such as an **intracranial hematoma** or **mass lesion**, which could have been precipitated or exacerbated by the fall.
*Electroencephalography*
- **EEG** is appropriate for later evaluation to diagnose and classify seizure disorders, but it is not the *most appropriate initial step* in the emergency setting for a first-time seizure with a possible traumatic etiology.
- An EEG might be normal shortly after a seizure, and it does not rule out acute structural brain pathology that requires urgent management.
*Lumbar puncture*
- A **lumbar puncture** is indicated if there's suspicion of meningoencephalitis (e.g., fever, nuchal rigidity, immunocompromised status), which are not prominent features in this patient.
- The patient's vital signs are stable, and there are no signs of infection, making this a less urgent initial diagnostic step compared to imaging.
*Lorazepam therapy*
- **Lorazepam** is a benzodiazepine used to terminate ongoing seizures (**status epilepticus**), but this patient's generalized contractions have already stopped.
- Administering lorazepam when the seizure has resolved is unnecessary and would only cause further sedation.
*Reassurance and follow-up*
- While reassurance is part of patient care, it is *insufficient* as the sole next step for a **first-time seizure** episode in an adolescent, especially with features suggesting a possible underlying acute cause.
- A thorough diagnostic workup, beginning with neuroimaging, is necessary to ensure there is no serious underlying pathology before considering discharge and follow-up.
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