Trauma Practice Questions

Q: A fracture mandible should be immobilized for an average of how many weeks?

6 weeks. **Explanation:** The standard duration for the immobilization of a mandibular fracture is **6 weeks**. This timeframe is based on the physiological process of bone healing. In the mandible, primary callus formation and sufficient clinical union typically occur within 4 to 6 weeks, allowing the bone to withstand the functional stresses of mastication. * **Why 6 weeks is correct:** Most mandibular fractures are treated via **Maxillomandibular Fixation (MMF)** or **Open Reduction and Internal Fixation (ORIF)**. For a healthy adult, 6 weeks provides the optimal balance between ensuring bony stability and preventing joint stiffness. * **Why 3 weeks is incorrect:** This is generally too short for adequate mineralization. While pediatric mandibular fractures heal faster (often requiring only 2–3 weeks of immobilization), in adults, premature mobilization leads to non-union or malunion. * **Why 9 and 12 weeks are incorrect:** Prolonged immobilization beyond 6–8 weeks is unnecessary for most simple fractures and significantly increases the risk of **ankylosis** of the Temporomandibular Joint (TMJ) and muscle atrophy. **Clinical Pearls for NEET-PG:** 1. **Pediatric Mandible:** Healing is rapid; immobilization is usually required for only **2–3 weeks**. 2. **Condylar Fractures:** These require **early mobilization** (usually after 1–2 weeks) to prevent TMJ ankylosis, unlike body or symphysis fractures. 3. **Commonest Site:** The **condyle** is the most common site of fracture in the mandible, followed by the angle and symphysis. 4. **Nerve Involvement:** The **inferior alveolar nerve** is the most common nerve injured in mandibular body fractures, leading to numbness of the lower lip.

Q: Which is the most common neurofibroma in the posterior mediastinum?

Neurofibroma. **Explanation:** The mediastinum is anatomically divided into compartments, each associated with specific types of tumors. The **posterior mediastinum** is the space located between the pericardium and the spine. **Why Neurofibroma is correct:** Neurogenic tumors are the most common primary tumors of the posterior mediastinum, accounting for approximately 75% of masses in this region. Among these, **Neurofibromas** and Neurilemmomas (Schwannomas) are the most frequent benign varieties. They typically arise from the intercostal nerves or the sympathetic chain. In the context of NEET-PG, if "Neurogenic tumor" is not an option, Neurofibroma is the specific histological subtype most frequently cited. **Why the other options are incorrect:** * **Teratoma:** These are germ cell tumors most commonly found in the **anterior mediastinum**. * **Lymphoma:** While lymphoma can involve any compartment, it is most classically associated with the **anterior or middle mediastinum** (lymph node chains). * **Bronchogenic Cyst:** These are the most common primary cysts of the mediastinum but are typically located in the **middle mediastinum**, near the subcarinal region or tracheobronchial tree. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 3Ts for Anterior Mediastinum:** Thymoma (most common), Teratoma, Thyroid (Ectopic/Retrosternal), and "Terrible" Lymphoma. * **Dumbbell Tumor:** A classic presentation of posterior mediastinal neurogenic tumors where the tumor extends through the intervertebral foramen, causing both spinal cord compression and a mediastinal mass. * **Pediatric vs. Adult:** In children, posterior mediastinal neurogenic tumors are more likely to be malignant (e.g., Neuroblastoma), whereas in adults, they are predominantly benign.

Q: In a suspected neck injury, what is the initial assessment priority?

Assess the neck first.. **Explanation:** In the management of trauma, particularly suspected neck injuries, the **Primary Survey (ABCDE)** dictates the sequence of care. However, in the specific context of a localized neck injury, the **neck must be assessed first** because it contains vital structures essential for life: the airway (larynx/trachea), major vascular channels (carotids/jugulars), and the cervical spine. Any compromise to these structures constitutes an immediate threat to life. * **Why Option B is correct:** The neck is the "bottleneck" of the body. An expanding hematoma or laryngeal fracture can lead to rapid airway obstruction. Therefore, immediate inspection for "Hard Signs" (e.g., active hemorrhage, bubbling wounds, expanding hematoma, or stridor) is the clinical priority to determine if emergency surgical intervention or airway management is required. * **Why Option A is wrong:** While head injuries are common comorbidities, the airway and vascular integrity (located in the neck) take precedence over neurological assessment (Disability) in the ABCDE sequence. * **Why Option C is wrong:** Waiting until the end of the primary survey is dangerous; the neck is evaluated during the 'A' (Airway with C-spine protection) and 'B' (Breathing) phases. * **Why Option D is wrong:** Assessment must be comprehensive, including the "Zones of the Neck" (I, II, and III), rather than focusing on a single bone. **High-Yield NEET-PG Pearls:** * **Hard Signs of Neck Injury:** Pulsatile bleeding, expanding hematoma, thrill/bruit, air bubbling from wound, and stridor. These mandate **immediate Neck Exploration**. * **Zone II** (between cricoid and angle of mandible) is the most commonly injured area. * **Platysma Rule:** Any wound penetrating the platysma muscle should never be probed in the ER; it requires surgical consultation and further imaging (CT Angiography) or exploration.

Q: Which of the following is referred to as balanced resuscitation?

Permitting a degree of hypotension to minimize bleeding.. **Explanation:** **Balanced Resuscitation** (also known as **Damage Control Resuscitation**) is a modern trauma management strategy designed to combat the "lethal triad" of acidosis, hypothermia, and coagulopathy. The core principle is **Permissive Hypotension**. In a bleeding trauma patient, aggressive fluid resuscitation to achieve normal blood pressure can "pop the clot" by increasing hydrostatic pressure and diluting clotting factors. By maintaining a lower-than-normal blood pressure (typically a Mean Arterial Pressure of 50–60 mmHg or a systolic BP of 80–90 mmHg), the clinician minimizes further hemorrhage and preserves initial clots until definitive surgical or radiological hemostasis is achieved. **Analysis of Incorrect Options:** * **Option A:** While "balanced" might sound like a ratio of fluids, the 1:1 ratio typically refers to **Massive Transfusion Protocols** (Plasma:Platelets:PRBCs), not a mix of colloids and crystalloids. * **Option B:** Maintaining acid-base balance is a goal of resuscitation, but it is a *result* of effective management, not the definition of the "balanced resuscitation" strategy. * **Option D:** This describes the **ABCDE** primary survey of trauma (ATLS protocol), which is the standard sequence of trauma care but not synonymous with balanced resuscitation. **High-Yield Pearls for NEET-PG:** * **Target BP:** In penetrating trauma, aim for a palpable radial pulse (SBP ~80-90 mmHg). * **Contraindication:** Permissive hypotension is **contraindicated in Traumatic Brain Injury (TBI)** because maintaining Cerebral Perfusion Pressure (CPP) is the priority; here, SBP should be kept >100-110 mmHg. * **Lethal Triad:** Acidosis, Hypothermia, and Coagulopathy. * **Fluid of Choice:** Isotonic crystalloids (like Ringer’s Lactate) are used initially, but early transition to blood products is preferred to avoid "dilutional coagulopathy."

Q: Under which step of the ABCDE approach to trauma care should needle decompression for tension pneumothorax be performed?

B (Breathing). **Explanation:** The **ABCDE approach** is the cornerstone of the Primary Survey in Advanced Trauma Life Support (ATLS). The correct answer is **B (Breathing)** because tension pneumothorax is a life-threatening condition that directly impairs pulmonary ventilation and gas exchange. 1. **Why 'B' is Correct:** The "Breathing" phase focuses on ensuring adequate oxygenation and ventilation. Tension pneumothorax causes a shift of mediastinal structures, compression of the contralateral lung, and severe respiratory distress. **Needle decompression** (converting a tension pneumothorax into a simple one) is the immediate life-saving intervention required during this step before proceeding to "C." 2. **Why Other Options are Incorrect:** * **A (Airway):** Focuses on maintaining a patent airway and cervical spine stabilization. While a tension pneumothorax affects breathing, the airway itself (trachea/larynx) is usually patent, though it may be deviated. * **C (Circulation):** Focuses on hemorrhage control and shock management. Although tension pneumothorax causes obstructive shock (by decreasing venous return), the *primary* pathology is respiratory; therefore, it must be addressed in 'B'. * **D (Disability):** Focuses on neurological status (GCS and pupil reaction), which is assessed only after A, B, and C are stabilized. **NEET-PG Clinical Pearls:** * **Diagnosis:** Tension pneumothorax is a **clinical diagnosis**. Do NOT wait for a X-ray. * **Classic Triad:** Respiratory distress, unilateral absent breath sounds, and hyper-resonance. Tracheal deviation is a late sign. * **Needle Decompression Site (ATLS 10th Ed):** 5th intercostal space, just anterior to the mid-axillary line in adults (the 2nd ICS at the mid-clavicular line is now the alternative site). * **Definitive Treatment:** Insertion of a wide-bore chest tube (Intercostal Drainage).

Q: A 25-year-old woman presents with a 1-cm stab wound to the left chest, located just inferior to the left breast in the mid-clavicular line. Examination reveals jugular venous distension and complete absence of breath sounds on the left side. She is experiencing severe dyspnea and hypoxia. What is the most likely diagnosis?

Tension pneumothorax. **Explanation:** The clinical presentation of severe dyspnea, hypoxia, **absent breath sounds**, and **jugular venous distension (JVD)** in the setting of penetrating chest trauma is classic for a **Tension Pneumothorax**. **Why Tension Pneumothorax is correct:** In a tension pneumothorax, a "one-way valve" mechanism allows air to enter the pleural space but prevents it from escaping. This leads to a rapid increase in intrapleural pressure, causing complete lung collapse (absent breath sounds). The resulting mediastinal shift compresses the vena cava, obstructing venous return to the heart, which manifests as JVD and eventual obstructive shock. **Why the other options are incorrect:** * **Cardiac Tamponade:** While it also presents with JVD (Beck’s Triad), it is characterized by **normal breath sounds**. The absence of breath sounds in this patient points directly to a pulmonary process. * **Spontaneous Pneumothorax:** This typically occurs without trauma (e.g., ruptured blebs in tall, thin males) and rarely progresses to the hemodynamic instability seen here. * **Open Pneumothorax:** Also known as a "sucking chest wound," this requires a defect at least 2/3 the diameter of the trachea. While it causes respiratory distress, it does not typically cause JVD unless it converts into a tension pneumothorax. **High-Yield NEET-PG Pearls:** * **Diagnosis:** Tension pneumothorax is a **clinical diagnosis**. Never wait for an X-ray; doing so can be fatal. * **Management:** Immediate **needle decompression** followed by tube thoracostomy (chest tube). * **Needle Site (ATLS 10th Ed):** 5th intercostal space, just anterior to the mid-axillary line (the 2nd ICS at the MCL is now the alternative site in adults). * **Differentiating Feature:** The presence of JVD + Absent breath sounds = Tension Pneumothorax. JVD + Normal breath sounds = Cardiac Tamponade.

Q: Initial emergency reduction of intracranial pressure is most rapidly accomplished by?

Hyperventilation. **Explanation:** The management of acutely raised intracranial pressure (ICP) in trauma requires interventions that act within seconds to minutes. **Why Hyperventilation is the Correct Answer:** Hyperventilation is the **fastest** method to reduce ICP. It works by decreasing the partial pressure of arterial carbon dioxide ($PaCO_2$). Low $PaCO_2$ causes immediate **pre-capillary cerebral vasoconstriction**, which reduces cerebral blood volume and, consequently, intracranial pressure. The effect begins within **1–5 minutes**. However, it is a temporary measure (lasting 4–6 hours) and must be used cautiously ($PaCO_2$ target: 30–35 mmHg) to avoid cerebral ischemia. **Analysis of Incorrect Options:** * **Saline-furosemide (Lasix):** While loop diuretics can reduce ICP by inducing systemic diuresis and decreasing CSF production, their onset is much slower than hyperventilation and they are not the primary choice in acute trauma. * **Urea infusion:** Urea is an osmotic diuretic similar to Mannitol. While effective, it takes **15–30 minutes** to exert its effect. It is rarely used today due to the risk of "rebound" ICP elevation and local tissue necrosis. * **Intravenous dexamethasone:** Steroids are effective for **vasogenic edema** (e.g., surrounding brain tumors) but have **no role** in the acute management of head injury or cytotoxic edema. In fact, the CRASH trial showed increased mortality with steroid use in traumatic brain injury. **NEET-PG High-Yield Pearls:** * **Gold Standard Osmotic Agent:** Mannitol (20%) is the most commonly used osmotic diuretic, but hyperventilation remains faster for immediate "burst" reduction. * **Monro-Kellie Doctrine:** The cranial vault is a fixed volume; an increase in one constituent (blood, CSF, or brain) must be compensated by a decrease in another. * **Cushing’s Triad:** A late sign of raised ICP consisting of hypertension, bradycardia, and irregular respiration.

Q: A patient with blunt trauma presents to the emergency department in a state of shock and is not responding to IV crystalloids. What is the next step in management?

Immediate laparotomy. **Explanation:** The core principle in managing blunt trauma is the assessment of hemodynamic stability. This patient is in **hemorrhagic shock** and is a **"non-responder"** to initial fluid resuscitation (crystalloids). In the setting of blunt trauma, a non-responder with persistent hypotension indicates ongoing, massive internal hemorrhage that requires immediate surgical intervention to achieve source control. **Why Option A is correct:** According to ATLS protocols, if a patient remains hemodynamically unstable despite adequate fluid resuscitation, the priority is to stop the bleeding. In blunt trauma, the most common site of occult major bleeding is the abdomen. Therefore, an **immediate laparotomy** is indicated to identify and repair the source of hemorrhage. **Why other options are incorrect:** * **B. Blood transfusion:** While blood products are necessary in hemorrhagic shock (ideally via massive transfusion protocol), they are an adjunct to surgery, not a definitive treatment for active, massive internal bleeding. * **C. Albumin transfusion:** Colloids like albumin have no proven benefit over crystalloids in acute trauma resuscitation and do not address the underlying surgical emergency. * **D. Abdominal compression:** This is not a standard or effective maneuver for controlling intra-abdominal blunt trauma hemorrhage and may worsen certain injuries (e.g., pelvic fractures). **Clinical Pearls for NEET-PG:** * **Responders:** Stabilize with fluids; proceed to CT scan for diagnosis. * **Transient Responders:** Improve initially but deteriorate; require rapid evaluation (FAST/DPL) and likely surgery. * **Non-Responders:** Persistent shock; require immediate operative intervention. * **FAST (Focused Assessment with Sonography for Trauma):** The investigation of choice in unstable patients to identify hemoperitoneum before heading to the OR. If FAST is positive in an unstable patient, laparotomy is the next step.

Question 1

A patient with spine, chest, and abdominal injury in a road traffic accident developed hypotension and bradycardia. What is the most likely reason?

Accepted Answer

Neurogenic shock

Answer

Hypovolemic shock

Answer

Distributive shock

Answer

Hypovolemic and septicemic shock

Question 2

A fracture mandible should be immobilized for an average of how many weeks?

Accepted Answer

6 weeks

Answer

3 weeks

Answer

9 weeks

Answer

12 weeks

Question 3

Which is the most common neurofibroma in the posterior mediastinum?

Accepted Answer

Neurofibroma

Answer

Teratoma

Answer

Lymphoma

Answer

Bronchogenic cyst

Question 4

A 24-year-old male, a victim of a road traffic accident, is brought to the casualty department with breathlessness and tachypnea. Examination reveals tracheal deviation to the left and a hyperresonant sound on the right side of the chest. How should this patient be managed?

Accepted Answer

Insert a large-bore intravenous needle into the 2nd intercostal space on the right midclavicular line.

Answer

Immediately intubate the patient and transfer them to the Intensive Care Unit (ICU).

Answer

Immediately send the patient for a chest X-ray and obtain a sample for Arterial Blood Gas (ABG) analysis.

Answer

Immediate decompression using chest tube insertion in the right midaxillary line, 4th intercostal space.

Question 5

In a suspected neck injury, what is the initial assessment priority?

Accepted Answer

Assess the neck first.

Answer

Assess for associated head injuries first.

Answer

Assess the neck at the end of the primary survey.

Answer

Focus assessment solely on the hyoid bone in the neck.

Question 6

Which of the following is referred to as balanced resuscitation?

Accepted Answer

Permitting a degree of hypotension to minimize bleeding.

Answer

Administering colloids and crystalloids in a 1:1 ratio.

Answer

Ensuring acid-base balance by maintaining normal pH.

Answer

Ensuring the patient has a patent airway, adequate breathing, and circulation.

Question 7

Under which step of the ABCDE approach to trauma care should needle decompression for tension pneumothorax be performed?

Accepted Answer

B (Breathing)

Answer

A (Airway)

Answer

C (Circulation)

Answer

D (Disability)

Question 8

A 25-year-old woman presents with a 1-cm stab wound to the left chest, located just inferior to the left breast in the mid-clavicular line. Examination reveals jugular venous distension and complete absence of breath sounds on the left side. She is experiencing severe dyspnea and hypoxia. What is the most likely diagnosis?

Accepted Answer

Tension pneumothorax

Answer

Cardiac tamponade

Answer

Spontaneous pneumothorax

Answer

Open pneumothorax

Question 9

Initial emergency reduction of intracranial pressure is most rapidly accomplished by?

Accepted Answer

Hyperventilation

Answer

Saline-furosemide (Lasix) infusion

Answer

Urea infusion

Answer

Intravenous dexamethasone (Decadron)

Question 10

A patient with blunt trauma presents to the emergency department in a state of shock and is not responding to IV crystalloids. What is the next step in management?

Accepted Answer

Immediate laparotomy

Answer

Blood transfusion

Answer

Albumin transfusion

Answer

Abdominal compression

Trauma — MCQs

Trauma — MCQs

On this page

Practice by Chapter

Want unlimited practice?