Trauma — MCQs

A 25-year-old man presented to the emergency department after trauma. On CXR, multiple rib fractures were visible. On physical examination, blood pressure was 80/60 mmHg and heart rate 150/min. The patient was restless and tachypneic with jugular veins distended. On auscultation, air entry was equal on both sides, and heart sounds were very soft or inaudible. What is the immediate step of management?

Q419Easy

Which of the following is NOT typically seen in a patient with a maxillary fracture?

Q420Easy

Which of the following neck zone injuries is associated with maximum mortality?

Trauma Indian Medical PG Practice Questions and MCQs

Question 411: Fracture of the zygoma shows all the following features except?

A. Diplopia
B. CSF rhinorrhoea (Correct Answer)
C. Epistaxis
D. Trismus

Explanation: **Explanation:** Zygomatic complex fractures (often called "Tripod fractures") involve the malar bone and its attachments. The correct answer is **CSF rhinorrhoea** because this clinical sign is pathognomonic of a fracture involving the **cribriform plate of the ethmoid bone**, typically seen in Le Fort II, Le Fort III, or naso-ethmoid-orbital (NEO) fractures. The zygoma does not form part of the floor of the anterior cranial fossa; therefore, its isolated fracture does not result in a dural tear or CSF leak. **Analysis of other options:** * **Diplopia:** Common in zygomatic fractures due to involvement of the orbital floor. It occurs because of entrapment of the inferior rectus or inferior oblique muscles, or due to orbital edema and displacement of the globe (enophthalmos). * **Epistaxis:** The zygoma forms the lateral wall and floor of the orbit and is intimately related to the **maxillary sinus**. A fracture usually causes bleeding into the sinus, which drains through the ostium into the nasal cavity. * **Trismus:** This occurs because a depressed zygomatic arch can mechanically obstruct the movement of the **coronoid process of the mandible**, or due to reflex spasm of the masseter muscle. **High-Yield Clinical Pearls for NEET-PG:** * **Tripod Fracture components:** 1. Zygomaticofrontal suture, 2. Zygomaticomaxillary suture, 3. Zygomatic arch. * **Clinical Sign:** "Flattening of the cheek" is a classic physical finding. * **Nerve Involvement:** Anesthesia or paresthesia in the distribution of the **infraorbital nerve** is frequently seen. * **Radiology:** The **Water’s View** (occipitomental) is the best conventional radiograph to visualize the zygomatic complex.

Question 412: A Tripoid fracture is seen in which of the following facial bones?

A. Mandible
B. Maxilla
C. Nasal bone
D. Zygoma (Correct Answer)

Explanation: **Explanation:** A **Tripod fracture**, also known as a **Zygomaticomaxillary Complex (ZMC) fracture**, is a common facial injury typically resulting from a direct blow to the cheek. The term "tripod" refers to the involvement of the three primary attachments of the **Zygoma (Malar bone)** to the rest of the facial skeleton: 1. **Zygomaticofrontal suture** (superiorly) 2. **Zygomaticotemporal suture** (laterally, at the zygomatic arch) 3. **Zygomaticomaxillary suture** (medially/inferiorly, involving the infraorbital rim and maxillary sinus) **Why the other options are incorrect:** * **Mandible:** Fractures here are classified by location (e.g., symphysis, angle, condyle). A common pattern is the "Guardsman fracture" (symphysis and bilateral condyles). * **Maxilla:** Fractures of the maxilla are categorized by the **Le Fort classification** (I, II, and III), which describes horizontal, pyramidal, and craniofacial disjunction patterns. * **Nasal bone:** This is the most common facial fracture but involves simple or comminuted breaks of the nasal bridge, not a tripod configuration. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** Patients often present with flattening of the cheek (loss of malar prominence), subconjunctival hemorrhage, and **paresthesia** in the distribution of the **infraorbital nerve**. * **Trismus:** May occur if the depressed zygomatic arch impinges on the coronoid process of the mandible. * **Imaging:** The **Water’s View** (occipitomental projection) is the classic X-ray choice, though NCCT is the gold standard. * **Diplopia:** Can occur due to entrapment of the inferior rectus muscle if the orbital floor is involved.

Question 413: All of the following are features of splenic rupture except?

A. Obliteration of psoas shadow
B. Obliteration of splenic outline
C. Elevation of left diaphragm
D. Obliteration of colonic air bubble (Correct Answer)

Explanation: In splenic rupture, radiological findings on a plain X-ray abdomen are primarily caused by the accumulation of blood (perisplenic hematoma) in the left upper quadrant. **Why Option D is the Correct Answer:** The **obliteration of the colonic air bubble** is not a feature of splenic rupture. In fact, the opposite occurs: a perisplenic hematoma typically causes **downward displacement** of the splenic flexure of the colon. This results in the colonic air bubble appearing lower than its normal anatomical position, rather than disappearing. **Explanation of Incorrect Options (Features of Splenic Rupture):** * **Obliteration of psoas shadow (A):** Large retroperitoneal or intraperitoneal hemorrhage can obscure the sharp margin of the psoas muscle on the affected side. * **Obliteration of splenic outline (B):** As blood collects around the spleen, the distinct anatomical border of the organ is lost against the surrounding fluid density. * **Elevation of left diaphragm (C):** Irritation of the diaphragm by blood or the presence of a large subphrenic hematoma often leads to reactive elevation of the left hemidiaphragm and restricted movement. **High-Yield Clinical Pearls for NEET-PG:** * **Kehr’s Sign:** Referred pain to the left shoulder due to diaphragmatic irritation (classic for splenic rupture). * **Ballance’s Sign:** Fixed dullness to percussion in the left flank and shifting dullness in the right flank. * **Investigation of Choice:** **CECT Abdomen** is the gold standard for stable patients; **FAST** (Focused Assessment with Sonography for Trauma) is used for unstable patients. * **Most common organ injured** in blunt trauma abdomen is the **Spleen**.

Question 414: What is the meaning of triage?

A. First come, first served
B. Labeling deceased patients
C. Treating patients with better prognosis
D. Identifying seriously ill patients who need treatment first (Correct Answer)

Explanation: **Explanation:** **Triage** is derived from the French word *trier*, meaning "to sort." In a mass casualty or emergency setting, medical resources are often limited. The core principle of triage is to do the **greatest good for the greatest number** of people. 1. **Why Option D is Correct:** Triage is the process of prioritizing patients based on the severity of their condition and their likelihood of survival with prompt intervention. It ensures that patients with life-threatening but treatable injuries (e.g., tension pneumothorax or airway obstruction) receive immediate care over those with minor injuries or those who are beyond medical help. 2. **Why Other Options are Incorrect:** * **Option A:** "First come, first served" is the opposite of triage. In trauma, a patient with a minor laceration who arrives first must wait for a patient with a major hemorrhage who arrives later. * **Option B:** While labeling deceased patients (Black Tag) is *part* of the triage process, it is not the definition of triage itself. * **Option C:** Triage does not simply favor those with a "better" prognosis; it focuses on those whose prognosis can be *changed* by immediate intervention. **High-Yield Clinical Pearls for NEET-PG:** * **Color Coding (START Protocol):** * **Red (Immediate):** Life-threatening but treatable (e.g., Airway/Hemorrhage). * **Yellow (Delayed):** Serious but not immediately life-threatening (e.g., stable fractures). * **Green (Minor):** "Walking wounded." * **Black (Deceased/Expectant):** Dead or injuries incompatible with life. * **Reverse Triage:** Occurs in military/combat settings where those who can be returned to the front lines quickly are treated first. * **Primary Triage:** Done at the site of the incident; **Secondary Triage** is done at the casualty clearing station.

Question 415: What is the most common form of shock?

A. Hypovolemic shock (Correct Answer)
B. Cardiogenic shock
C. Neurogenic shock
D. Septicemic shock

Explanation: **Explanation:** Shock is defined as a state of cellular and tissue hypoxia due to reduced oxygen delivery, increased oxygen consumption, or inadequate oxygen utilization. **1. Why Hypovolemic Shock is the Correct Answer:** Hypovolemic shock is statistically the **most common form of shock** encountered in clinical practice, particularly in surgical and emergency settings. It results from a decrease in intravascular volume, most frequently due to **hemorrhage** (trauma, GI bleed) or non-hemorrhagic fluid loss (vomiting, diarrhea, burns). In the context of trauma—a high-yield area for NEET-PG—hemorrhagic shock is the leading cause of preventable death. **2. Analysis of Incorrect Options:** * **Cardiogenic Shock:** Caused by primary pump failure (e.g., Myocardial Infarction). While common in cardiac ICUs, it is less frequent than hypovolemia in the general population. * **Neurogenic Shock:** A form of distributive shock caused by the loss of sympathetic tone following spinal cord injury. It is relatively rare. * **Septicemic (Septic) Shock:** A subset of distributive shock caused by a dysregulated host response to infection. While it is the most common cause of death in non-cardiac ICUs, it ranks second to hypovolemia in overall global incidence. **NEET-PG High-Yield Pearls:** * **Most common shock in trauma:** Hypovolemic (Hemorrhagic) shock. * **Most common cause of distributive shock:** Septic shock. * **Early sign of shock:** Tachypnea and Tachycardia (Note: Blood pressure may remain normal in "Compensated Shock"). * **The "Golden Hour":** The critical period following injury where rapid resuscitation from hypovolemic shock significantly improves survival.

Question 416: What is the appropriate treatment for a young male who suddenly develops a massive left-sided hemothorax following an accident?

A. Chest strapping
B. Tube thoracostomy (Correct Answer)
C. Endotracheal intubation with intermittent positive pressure ventilation and pleural fluid aspiration
D. Conservative management with observation

Explanation: **Explanation:** The primary goal in managing a massive hemothorax is **rapid decompression** of the pleural space and **re-expansion of the lung**. 1. **Why Tube Thoracostomy is Correct:** A **Tube Thoracostomy (Intercostal Drainage - ICD)** is the definitive initial treatment. It serves three critical purposes: it evacuates the blood to allow lung expansion (improving ventilation), it permits monitoring of the rate of ongoing blood loss, and the pressure of the expanded lung against the chest wall can often tamponade low-pressure bleeding from small vessels. 2. **Why Other Options are Incorrect:** * **Chest Strapping (A):** This is contraindicated as it restricts chest wall movement, worsens respiratory mechanics, and does nothing to remove the intrapleural blood. * **Intubation and Aspiration (C):** While IPPV may be needed for respiratory failure, simple "aspiration" (thoracocentesis) is inadequate for a massive hemothorax as the needle will likely clog with clots, and it doesn't allow for continuous drainage or monitoring. * **Conservative Management (D):** Massive hemothorax is a life-threatening emergency causing both hemorrhagic shock and respiratory compromise; observation is fatal. **High-Yield Clinical Pearls for NEET-PG:** * **Definition of Massive Hemothorax:** Accumulation of >1500 ml of blood or >1/3rd of the patient's blood volume in the pleural space. * **Indications for Emergency Thoracotomy:** 1. Immediate output of **>1500 ml** of blood upon ICD insertion. 2. Continued bleeding of **200 ml/hour for 2–4 hours**. 3. Patient remains hemodynamically unstable despite adequate blood transfusion. * **Positioning:** The chest tube is typically inserted in the **5th intercostal space**, just anterior to the mid-axillary line.

Question 417: In a patient of trauma with no head injury, what is the target systolic blood pressure for resuscitation?

A. 50-70 mm of Hg
B. 70-90 mm of Hg (Correct Answer)
C. 90-110 mm of Hg
D. > 110 mm of Hg

Explanation: ### Explanation The correct answer is **B. 70-90 mm of Hg**. This question tests the concept of **Permissive Hypotension** (also known as hypotensive resuscitation). In a trauma patient with active non-compressible hemorrhage (and no traumatic brain injury), the goal is to maintain a blood pressure high enough to preserve vital organ perfusion but low enough to avoid "popping the clot." **Why 70-90 mm of Hg is correct:** Aggressive fluid resuscitation to reach "normal" blood pressure (e.g., >110 mmHg) can be detrimental. High pressures can dislodge newly formed unstable clots, dilute clotting factors, and cause hypothermia, leading to increased bleeding. A target Systolic Blood Pressure (SBP) of **70–90 mmHg** (or the presence of a palpable radial pulse) ensures adequate perfusion to the brain and kidneys while minimizing further blood loss until definitive surgical or radiological hemorrhage control is achieved. **Analysis of Incorrect Options:** * **A (50-70 mm Hg):** This is too low; it risks irreversible ischemic damage to vital organs (acute tubular necrosis or cerebral ischemia). * **C & D (>90 mm Hg):** These targets represent "aggressive resuscitation." While traditionally taught, they are now avoided in the initial phase of trauma because they exacerbate the "lethal triad" (acidosis, coagulopathy, and hypothermia) by causing dilutional coagulopathy and increasing hydrostatic pressure at the site of injury. **Clinical Pearls for NEET-PG:** * **Exception (TBI):** If the patient has a **Head Injury (TBI)**, permissive hypotension is **contraindicated**. The target SBP must be **>100–110 mmHg** to maintain Cerebral Perfusion Pressure (CPP). * **Lethal Triad of Trauma:** Acidosis, Hypothermia, and Coagulopathy. * **Damage Control Resuscitation:** Focuses on permissive hypotension, limiting crystalloids, and early use of blood products (1:1:1 ratio of PRBC:FFP:Platelets).

Question 418: A 25-year-old man presented to the emergency department after trauma. On CXR, multiple rib fractures were visible. On physical examination, blood pressure was 80/60 mmHg and heart rate 150/min. The patient was restless and tachypneic with jugular veins distended. On auscultation, air entry was equal on both sides, and heart sounds were very soft or inaudible. What is the immediate step of management?

A. Needle insertion in the 5th intercostal space
B. Echo-guided pericardiocentesis (Correct Answer)
C. Intercostal tube drainage on both sides
D. Intravenous fluids for hypotension

Explanation: ### Explanation The patient presents with the classic **Beck’s Triad**: hypotension (80/60 mmHg), jugular venous distension (JVD), and muffled/inaudible heart sounds. In the setting of trauma, this triad is pathognomonic for **Cardiac Tamponade**. **1. Why Option B is Correct:** Cardiac tamponade occurs when blood accumulates in the pericardial sac, increasing intrapericardial pressure and preventing the heart from filling (diastolic collapse). This leads to a sudden drop in cardiac output and obstructive shock. **Echo-guided pericardiocentesis** is the immediate management step to evacuate the fluid, relieve the pressure, and restore hemodynamic stability. Ultrasound guidance is preferred over "blind" procedures to minimize the risk of myocardial or coronary artery injury. **2. Why Other Options are Incorrect:** * **Option A (Needle Decompression):** This is the treatment for Tension Pneumothorax. While tension pneumothorax also presents with hypotension and JVD, it is characterized by **absent breath sounds** and tracheal deviation. Here, air entry is equal on both sides, ruling it out. * **Option C (ICD):** Chest tube drainage is used for hemothorax or pneumothorax. Since breath sounds are normal, there is no immediate indication for bilateral ICDs. * **Option D (IV Fluids):** While fluids may temporarily increase preload and help maintain blood pressure in tamponade, they do not address the underlying pathology. Definitive decompression is the priority. **Clinical Pearls for NEET-PG:** * **Beck’s Triad:** Hypotension, Distended Neck Veins, Muffled Heart Sounds. * **Pulsus Paradoxus:** A drop in systolic BP >10 mmHg during inspiration (common in tamponade). * **Kussmaul’s Sign:** Paradoxical rise in JVP on inspiration (more common in constrictive pericarditis, but can be seen in tamponade). * **Electrical Alternans:** Alternating QRS amplitude on ECG, diagnostic of large pericardial effusion. * **Gold Standard:** For traumatic tamponade in a stable setting, Echo is best; in an unstable patient with a penetrating wound, **Emergency Resuscitative Thoracotomy** may be indicated.

Question 419: Which of the following is NOT typically seen in a patient with a maxillary fracture?

A. Cerebrospinal fluid (CSF) rhinorrhea
B. Malocclusion
C. Anesthesia of the upper lip
D. Surgical emphysema (Correct Answer)

Explanation: In maxillary fractures (specifically Le Fort types), the anatomical involvement of the midface dictates the clinical presentation. **Why Surgical Emphysema is the Correct Answer:** Surgical emphysema (subcutaneous air) is most commonly associated with fractures involving the **paranasal sinuses** (especially the frontal or ethmoid sinuses) or injuries to the **larynx, trachea, or lungs**. While the maxillary sinus is involved in Le Fort fractures, surgical emphysema is a much more characteristic and "classic" finding in **Zygomaticomaxillary Complex (ZMC) fractures** or orbital floor fractures where air is forced into the soft tissues from the sinus. In the context of standard Le Fort classifications, it is considered the "least typical" finding compared to the other definitive signs listed. **Analysis of Incorrect Options:** * **CSF Rhinorrhea:** Seen in Le Fort II and III fractures. These involve the ethmoid bone and cribriform plate, leading to dural tears and leakage of CSF through the nose. * **Malocclusion:** This is the hallmark of maxillary fractures. Because the maxilla houses the upper dental arch, any displacement results in a "gagged" bite or an anterior open bite. * **Anesthesia of the Upper Lip:** The **infraorbital nerve** (a branch of V2) runs through the infraorbital canal in the maxillary floor. Fractures (especially Le Fort II) frequently compress or lacerate this nerve, causing numbness in the upper lip and cheek. **High-Yield Clinical Pearls for NEET-PG:** * **Le Fort I:** Floating palate (horizontal fracture). * **Le Fort II:** Pyramidal fracture; involves the infraorbital rim. * **Le Fort III:** Craniofacial disjunction; involves the zygomatic arch. * **Guerin’s Sign:** Ecchymosis in the region of the greater palatine vessels (seen in Le Fort I). * **Dish-face deformity:** Characteristic of Le Fort II and III due to midface retrusion.

Question 420: Which of the following neck zone injuries is associated with maximum mortality?

A. Zone I (Correct Answer)
B. Zone II
C. Zone III
D. Zone IV

Explanation: **Explanation:** The classification of neck injuries is based on the anatomical zones described by Monson and Roon. **Zone I** is associated with the **highest mortality** primarily due to the presence of critical, large-caliber vascular structures and the difficulty of surgical access. **1. Why Zone I is the correct answer:** Zone I extends from the clavicles/sternal notch to the cricoid cartilage. It houses the "thoracic outlet" structures, including the proximal carotid arteries, subclavian vessels, vertebral arteries, the cupula of the lung, trachea, esophagus, and the thoracic duct. Injuries here are lethal because major vascular hemorrhage is often hidden within the mediastinum, and surgical exposure frequently requires complex maneuvers like a median sternotomy or thoracotomy, leading to delays in definitive repair. **2. Why other options are incorrect:** * **Zone II (Cricoid to Angle of Mandible):** This is the most commonly injured zone. However, it has the **lowest mortality** because it is surgically the most accessible. Injuries are easily exposed via a standard longitudinal incision along the sternocleidomastoid muscle. * **Zone III (Angle of Mandible to Base of Skull):** This zone contains the distal carotid artery and jugular veins. While surgical access is difficult (often requiring mandibular subluxation), the mortality is generally lower than Zone I because the vessels are smaller and more easily tamponaded against the skull base. * **Zone IV:** This is not a standard anatomical zone in the Roon and Christensen classification; the neck is divided into only three zones. **Clinical Pearls for NEET-PG:** * **Most common site of injury:** Zone II. * **Highest mortality:** Zone I. * **Hard Signs of Vascular Injury:** Pulsatile hematoma, active arterial bleed, thrill/bruit, and distal pulse deficit. These mandate **immediate surgical exploration** regardless of the zone. * **Current Management Trend:** There is a shift from "mandatory exploration" of Zone II to **Selective Management** based on CT Angiography (CTA) findings in stable patients.

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Trauma — MCQs

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