Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 1091: Basilar skull fracture with Battle's sign: What are the clinical signs and the at-risk nerve?

A. Bruising behind ears, CSF otorrhea; Facial nerve (Correct Answer)
B. Bruising around eyes, CSF rhinorrhea; Optic nerve
C. Blood in sclera, anosmia; Olfactory nerve
D. Hearing loss, swallowing difficulty; Glossopharyngeal nerve

Explanation: ***Bruising behind ears, CSF otorrhea; Facial nerve*** - **Battle's sign** is periauricular **ecchymosis** appearing hours to days after trauma, indicating a basilar skull fracture. **CSF otorrhea**, leakage of cerebrospinal fluid from the ear, also signifies penetration of the tympanic membrane associated with a temporal bone fracture. - The **facial nerve (CN VII)** passes through the temporal bone and is commonly injured in basilar skull fractures affecting this region, leading to facial paralysis. *Bruising around eyes, CSF rhinorrhea; Optic nerve* - **Raccoon eyes** (periorbital ecchymosis) and **CSF rhinorrhea** (CSF leakage from the nose) are indeed signs of a basilar skull fracture, particularly involving the anterior cranial fossa. - However, the **optic nerve (CN II)** is typically not directly at risk from these types of fractures unless there is severe trauma directly impinging on the optic canal, and the question specifically asks for the at-risk nerve in the context of Battle's sign and CSF otorrhea. *Blood in sclera, anosmia; Olfactory nerve* - **Subconjunctival hemorrhage** (blood in sclera) can be a sign of head trauma but is less specific for a basilar skull fracture than Battle's sign or Raccoon eyes. - **Anosmia** (loss of smell) and injury to the **olfactory nerve (CN I)** are associated with fractures of the cribriform plate in the anterior cranial fossa, not typically with the temporal bone fractures causing Battle's sign or CSF otorrhea. *Hearing loss, swallowing difficulty; Glossopharyngeal nerve* - **Hearing loss** can occur with temporal bone fractures due to damage to the ossicles or inner ear structures, but it is a symptom, not a specific sign like Battle's sign. - **Swallowing difficulty** and injury to the **glossopharyngeal nerve (CN IX)** are rare complications of basilar skull fractures and are primarily associated with fractures near the jugular foramen.

Question 1092: A 20-year-old male involved in a motor vehicle accident presents with facial asymmetry and trismus. A CT scan shows a fracture of the zygomatic arch. What is the best treatment approach?

A. Closed reduction
B. Jaw wiring
C. Open reduction and internal fixation
D. Minimally invasive zygomatic arch elevation (Correct Answer)

Explanation: ***Minimally invasive zygomatic arch elevation*** - This technique is suitable for **isolated zygomatic arch fractures** without significant displacement of the zygomatic body, which often present with **facial asymmetry** and **trismus**. - It involves using a hook or other instruments inserted through a small incision to elevate and restore the arch to its anatomical position. *Closed reduction* - While closed reduction can be used for some fractures, it is generally less effective for **zygomatic arch fractures** that lead to significant **trismus** and asymmetry due to lack of stable fixation. - This method carries a higher risk of **re-displacement** and suboptimal cosmetic and functional outcomes compared to arch elevation. *Open reduction and internal fixation* - This approach is typically reserved for more complex fractures, such as **tripod (zygomaticomaxillary complex) fractures**, or significantly displaced zygomatic body fractures with involvement of multiple suture lines. - ORIF is generally **overkill** for an isolated, less comminuted zygomatic arch fracture and carries risks of larger incisions, more extensive dissection, and potential plate palpability. *Jaw wiring* - **Jaw wiring**, or maxillomandibular fixation (MMF), is primarily used for **mandibular fractures** to immobilize the jaw and facilitate bony healing. - It is not an appropriate treatment for **zygomatic arch fractures**, as it does not address the displacement of the zygoma or the impingement on the coronoid process causing trismus.

Question 1093: A 35-year-old patient presents with sudden loss of vision following blunt trauma to the eye. Imaging reveals a fracture of the orbital floor with entrapment of the inferior rectus muscle. What is the most appropriate next step?

A. Immediate surgical intervention (Correct Answer)
B. Observation and follow-up
C. Topical corticosteroids
D. Laser photocoagulation

Explanation: ***Immediate surgical intervention*** - **Sudden vision loss** combined with **muscle entrapment** represents a **surgical emergency** requiring immediate intervention. - Vision loss may indicate **orbital compartment syndrome**, **retrobulbar hemorrhage**, or **optic nerve compromise** requiring urgent decompression. - **Entrapment of the inferior rectus muscle** in an orbital floor fracture can lead to **ischemic necrosis** and permanent diplopia if not released promptly. - The combination of **visual compromise** and **mechanical entrapment** mandates urgent surgical exploration and repair. *Observation and follow-up* - This approach is reserved for **nondisplaced fractures** with **no muscle entrapment** and **no visual disturbances**. - Given the patient's **sudden vision loss** and **confirmed muscle entrapment**, observation would risk **irreversible vision loss** and permanent damage. - Delaying surgery increases the risk of **fibrosis** and poor functional outcomes. *Topical corticosteroids* - **Topical corticosteroids** manage **superficial inflammation** but do not address **orbital compartment syndrome** or **structural damage**. - They have no role in treating **mechanical entrapment** or **vision-threatening complications** of orbital fractures. *Laser photocoagulation* - **Laser photocoagulation** is used for **retinal pathology** such as tears, diabetic retinopathy, or retinal vein occlusion. - This procedure is completely irrelevant to **orbital bone fractures** and **muscle entrapment**.

Question 1094: A 40-year-old woman sustains a 20% total body surface area burn. She presents with hypotension and tachycardia. What is the most appropriate initial fluid therapy?

A. D5W
B. Normal saline
C. Lactated Ringer's (Correct Answer)
D. Plasma

Explanation: ***Lactated Ringer's*** - **Lactated Ringer's solution** is the **resuscitation fluid of choice** for burn patients per the **Parkland formula** - Its composition is similar to **extracellular fluid**, effectively restoring fluid and electrolyte balance - Contains **lactate** which is metabolized in the liver to **bicarbonate**, helping counteract the **mild acidosis** often seen in burn patients - Isotonic crystalloid that provides adequate **intravascular volume expansion** in hypovolemic shock *Incorrect: D5W* - **D5W (5% Dextrose in Water)** is a **hypotonic solution** that primarily distributes into the **intracellular compartment** - Does not effectively expand intravascular volume necessary for resuscitation - Inappropriate for patients with **significant burns and hypovolemia** requiring urgent volume replacement *Incorrect: Normal saline* - While **normal saline (0.9% NaCl)** is an isotonic crystalloid, large volumes lead to **hyperchloremic metabolic acidosis** due to high chloride content (154 mEq/L) - Can exacerbate existing acidosis in burn patients - Less physiologically balanced than Lactated Ringer's for burn resuscitation *Incorrect: Plasma* - **Plasma** is a colloid solution **not used for initial fluid resuscitation** in the acute burn phase - Reserved for specific situations: **severe hypoproteinemia** or **coagulation factor deficiencies** - Carries risks including **allergic reactions** and **transfusion-related acute lung injury (TRALI)** - Not part of standard burn resuscitation protocols

Question 1095: A patient with a history of head trauma presents with cerebrospinal fluid rhinorrhea. What is the most appropriate management?

A. Antibiotics
B. Surgical repair
C. Nasal packing
D. Observation (Correct Answer)

Explanation: ***Observation (Conservative management)*** - **Initial management** of post-traumatic CSF rhinorrhea is conservative, as **80-85% of cases resolve spontaneously** within 7-10 days. - Conservative measures include **bed rest, head elevation (30-45 degrees)**, avoidance of straining, nose blowing, and Valsalva maneuvers. - A **lumbar drain** may be placed to reduce CSF pressure and promote dural healing. - Surgical intervention is reserved for leaks **persisting beyond 2 weeks** or high-flow leaks that fail conservative management. *Surgical repair* - Indicated only for **persistent CSF leaks** (>2 weeks), high-flow leaks, or recurrent leaks after conservative management. - Not the **first-line approach** as most traumatic CSF rhinorrhea resolves without surgery. - Approaches include endoscopic or transcranial repair depending on the location and size of the defect. *Antibiotics* - **Prophylactic antibiotics are NOT recommended** for CSF rhinorrhea due to lack of evidence for benefit and risk of promoting resistant organisms. - Antibiotics should only be given if there is evidence of **active meningitis or infection**. - The risk of meningitis is approximately 10-25% with persistent leaks, reinforcing the need for definitive management if conservative measures fail. *Nasal packing* - **Contraindicated** in CSF rhinorrhea as it can increase intracranial pressure, worsen the leak, and introduce infection risk. - Does not address the underlying **dural defect** and may impede natural healing.

Question 1096: What is the primary goal of using a damage control surgery approach in a trauma patient with multiple life-threatening injuries?

A. To definitively repair all injuries in one operation
B. To stabilize the patient by controlling bleeding and contamination (Correct Answer)
C. To perform all possible surgeries back-to-back
D. To delay surgery until the patient is transferred to a specialized center

Explanation: ***To stabilize the patient by controlling bleeding and contamination*** - Damage control surgery prioritizes immediate **life-saving interventions** like stopping hemorrhage and preventing sepsis to overcome the "lethal triad" of hypothermia, acidosis, and coagulopathy. - This staged approach aims to stabilize critically unwell patients who cannot tolerate a lengthy definitive repair, allowing for physiological recovery before subsequent operations. *To definitively repair all injuries in one operation* - Attempting to definitively repair all injuries in a critically unstable trauma patient would expose them to prolonged anesthesia and further physiological derangement, increasing morbidity and mortality. - The goal of damage control is to perform minimal, essential surgery, postponing complex repairs until the patient's condition is more stable. *To perform all possible surgeries back-to-back* - This approach would lead to excessive operative time and physiological stress, thereby exacerbating the patient's instability and increasing the risk of complications from the "lethal triad." - Damage control involves planned pauses between surgical stages to allow for patient resuscitation and recovery. *To delay surgery until the patient is transferred to a specialized center* - While transfer to a specialized trauma center is often necessary, **immediate damage control** interventions are sometimes required to stabilize a patient enough to survive transport. - Delaying crucial initial surgical steps like hemorrhage control can be fatal for patients with severe, life-threatening injuries.

Question 1097: What is the most appropriate initial management for a polytrauma patient with both a pneumothorax and a pelvic fracture?

A. Pelvic fixation followed by chest tube placement
B. Simultaneous chest tube and pelvic fixation
C. Conservative management for both
D. Chest tube placement followed by pelvic fixation (Correct Answer)

Explanation: ***Chest tube placement followed by pelvic fixation*** - In polytrauma management following **ATLS protocol**, the **primary survey** prioritizes life-threatening conditions in the sequence: Airway, Breathing, Circulation. - A **significant pneumothorax** impairs ventilation and oxygenation (B - Breathing) and must be addressed before definitive management of pelvic fractures (C - Circulation, hemorrhage control). - **Chest tube placement** provides immediate decompression and re-expansion of the lung, ensuring adequate oxygenation before proceeding with other interventions. - While pelvic fractures can cause life-threatening hemorrhage, a **pelvic binder** is typically applied early for temporary stabilization, but definitive pelvic fixation comes after addressing breathing problems. *Pelvic fixation followed by chest tube placement* - This reverses the **ATLS sequence** by prioritizing circulation over breathing. - Delaying treatment of a **significant pneumothorax** could lead to progressive hypoxia, tension pneumothorax, or cardiorespiratory compromise. - While pelvic hemorrhage is serious, **oxygenation failure** can be rapidly fatal and must be corrected first. *Simultaneous chest tube and pelvic fixation* - While some interventions can occur concurrently in a trauma bay with adequate resources, **chest tube insertion is a rapid procedure** that should be completed first to ensure adequate oxygenation. - Definitive **pelvic fixation** (surgical or external fixation) is a more complex, time-consuming procedure that typically occurs after the primary survey is completed. - Initial pelvic stabilization with a **binder** can occur early, but formal fixation follows chest tube placement. *Conservative management for both* - In a **polytrauma patient**, both a symptomatic pneumothorax and an unstable pelvic fracture typically require active intervention due to their potential for severe complications. - **Conservative management** would be inappropriate for significant injuries in the acute polytrauma setting where rapid deterioration is possible. - Small, asymptomatic pneumothoraces might be observed in stable patients, but the polytrauma context implies more significant injuries requiring intervention.

Question 1098: A 40-year-old male with a head injury presents with a GCS of 8, BP of 90/60, and HR of 120. A CT scan shows an epidural hematoma. What are the immediate management priorities?

A. Intubation and ventilation (Correct Answer)
B. Administer mannitol for intracranial pressure management
C. Perform immediate craniotomy
D. Administer intravenous fluids and monitor vital signs

Explanation: ***Intubation and ventilation*** - A GCS of 8 or less mandates **immediate intubation** to protect the airway and prevent aspiration in a patient who cannot maintain their airway. - In the **ATLS primary survey sequence**, airway management is the first priority, though in practice this is done **simultaneously** with fluid resuscitation. - Maintaining **adequate oxygenation and normocapnia** is crucial for preventing secondary brain injury and managing intracranial pressure. - **Critical point**: While this patient requires both airway management AND fluid resuscitation urgently, securing the airway takes immediate precedence as the patient cannot protect their airway at GCS 8. *Administer mannitol for intracranial pressure management* - While mannitol can reduce ICP, it is **not an immediate priority** before securing airway, breathing, and circulation. - Mannitol is **contraindicated in hypovolemic/hypotensive patients** as it acts as an osmotic diuretic and can worsen hypotension. - ICP management with mannitol should only be considered after hemodynamic stabilization and in the context of signs of herniation. *Perform immediate craniotomy* - Although epidural hematomas typically require **urgent surgical evacuation**, the patient must first be physiologically stabilized. - **No patient should go to the operating room in hemorrhagic shock** without ABC stabilization. - Airway protection, ventilation, and circulatory resuscitation must precede definitive neurosurgical intervention to ensure the patient can safely tolerate anesthesia and surgery. *Administer intravenous fluids and monitor vital signs* - This is a **critical and equally urgent priority** - the patient is in shock (BP 90/60, HR 120), likely from associated injuries or blood loss. - **Hypotension (SBP <90 mmHg) is the most detrimental secondary insult** in head-injured patients and doubles mortality (per Brain Trauma Foundation guidelines). - Fluid resuscitation should begin **simultaneously** with airway management to restore cerebral perfusion pressure. - However, in the ATLS sequence, airway (A) precedes circulation (C), making intubation the first listed priority, though both must be addressed concurrently in practice.

Question 1099: In trauma surgery, what is the primary concern when a patient presents with hard signs of vascular injury?

A. Immediate administration of anticoagulants
B. Ultrasound assessment of the affected limb
C. Surgical exploration and possible vascular repair (Correct Answer)
D. Observation and reassessment in 24 hours

Explanation: ***Surgical exploration and possible vascular repair*** - The presence of **hard signs of vascular injury** (e.g., pulsatile bleeding, rapidly expanding hematoma, thrill, bruit, absent pulses distal to injury) indicates an acute, limb-threatening or life-threatening situation requiring **immediate surgical intervention**. - **Surgical exploration** allows for direct visualization, control of bleeding, and **definitive repair** of the damaged vessel, which is crucial to prevent ischemia, hemorrhage, and subsequent limb loss or patient demise. *Immediate administration of anticoagulants* - Administering **anticoagulants** in the setting of acute vascular trauma with active bleeding is **contraindicated** as it would exacerbate hemorrhage, leading to significant blood loss and hemodynamic instability. - Anticoagulation is typically used in situations to prevent clot formation, not to manage active vascular injury. *Ultrasound assessment of the affected limb* - While **ultrasound** can be useful for diagnosing vascular injuries, in the presence of **hard signs**, it is generally **not the primary initial step** because it delays definitive treatment. - The urgency of hard signs necessitates immediate surgical intervention, and confirmatory imaging like ultrasound should only be considered if it does not delay transfer to the operating room. *Observation and reassessment in 24 hours* - **Observation** for a patient with **hard signs of vascular injury** is **highly inappropriate** and dangerous, as these signs indicate an active, critical condition. - Delaying intervention by 24 hours would likely result in irreversible **ischemic damage**, limb loss, or potentially fatal hemorrhage.

Question 1100: A 28-year-old male presents with a crush injury to the leg. His leg is swollen, and he experiences severe pain with passive stretching of the toes. What is the next best step in management?

A. MRI of the leg
B. Immediate fasciotomy (Correct Answer)
C. Elevation of the limb
D. Administer IV antibiotics

Explanation: ***Immediate fasciotomy*** - The combination of a **crush injury**, **swollen leg**, and **severe pain with passive stretching of the toes** is highly indicative of **acute compartment syndrome**, which requires immediate surgical intervention to prevent irreversible tissue damage. - A fasciotomy rapidly relieves pressure within the muscle compartments, restoring blood flow and saving threatened muscle and nerve tissue. *MRI of the leg* - While an MRI can provide detailed images of soft tissues, it is a time-consuming diagnostic tool that would delay critical treatment for acute compartment syndrome. - The clinical presentation is sufficiently clear to proceed directly to surgical management. *Elevation of the limb* - In suspected **acute compartment syndrome**, the limb should be kept at **heart level** to optimize perfusion pressure. - Elevating the limb above heart level can reduce arterial inflow and potentially worsen ischemia, while keeping it dependent can increase venous pressure and compartment pressure. - This is not a definitive treatment and delays the necessary surgical intervention. *Administer IV antibiotics* - Although crush injuries carry a risk of infection, antibiotics are not the primary or immediate treatment for the life-threatening condition of **acute compartment syndrome**. - Delaying surgical decompression to administer antibiotics would result in irreversible muscle and nerve damage.

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Extremity Trauma

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Vascular Trauma

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