Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 111: A child presents to the casualty department in stable condition after blunt abdominal trauma associated with splenic trauma. What is the treatment of choice?

A. Observation (Correct Answer)
B. Splenectomy
C. Arterial embolisation
D. Splenorrhaphy

Explanation: **Explanation:** The management of splenic trauma has shifted significantly toward **Non-Operative Management (NOM)**, especially in the pediatric population. **1. Why Observation is Correct:** In a **hemodynamically stable** child, observation (NOM) is the treatment of choice regardless of the grade of injury seen on CT scan. Children have a more flexible rib cage, a thicker splenic capsule, and more efficient intraparenchymal vessel contraction compared to adults. These factors lead to a higher success rate of spontaneous healing (over 90%). The primary goal is to preserve splenic function and avoid the lifelong risk of **Overwhelming Post-Splenectomy Infection (OPSI)**. **2. Why Other Options are Incorrect:** * **Splenectomy:** This is reserved for patients with hemodynamic instability (refractory shock) or failed conservative management. In children, it is a last resort. * **Arterial Embolization:** While used in adults with active contrast extravasation (blush) on CT, its role in children is less frequent and usually secondary to failed observation. * **Splenorrhaphy:** This involves surgical repair of the spleen. While it preserves splenic tissue, it still requires a laparotomy. If the child is stable, non-invasive observation is preferred over any surgical intervention. **Clinical Pearls for NEET-PG:** * **Most common organ injured** in blunt abdominal trauma: Spleen (Overall); Liver (in some recent series, but Spleen remains the classic exam answer). * **Kehr’s Sign:** Referred pain to the left shoulder due to diaphragmatic irritation (phrenic nerve). * **Ballance’s Sign:** Fixed dullness in the left flank and shifting dullness in the right flank. * **Vaccination:** If splenectomy is performed, patients must be vaccinated against encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*) ideally 14 days before (elective) or 14 days after (emergency) surgery.

Question 112: What is the most common manifestation of increased intracranial pressure in a patient with head injury?

A. Change in the level of consciousness (Correct Answer)
B. Ipsilateral pupillary dilatation
C. Retching and vomiting
D. Bradycardia

Explanation: **Explanation:** The **most common and earliest manifestation** of increased intracranial pressure (ICP) in a head injury patient is a **change in the level of consciousness**. This occurs because the cerebral cortex and the reticular activating system (RAS) are highly sensitive to even minor decreases in cerebral perfusion pressure (CPP) or mechanical shifts caused by rising ICP. Patients may initially present with irritability, confusion, or restlessness before progressing to lethargy and coma. **Analysis of Options:** * **B. Ipsilateral pupillary dilatation:** This is a sign of **uncal herniation** (a late stage of increased ICP). It occurs due to compression of the 3rd cranial nerve (Oculomotor). While specific, it is not the *most common* or earliest sign. * **C. Retching and vomiting:** While common in pediatric patients and seen in adults, it is non-specific and often follows the initial change in mental status. "Projectile vomiting" without nausea is the classic description for raised ICP. * **D. Bradycardia:** This is part of the **Cushing’s Triad** (Bradycardia, Hypertension/Widening pulse pressure, and Irregular respirations). This is a **late/terminal sign** indicating impending brainstem herniation. **NEET-PG High-Yield Pearls:** * **Gold Standard for ICP Monitoring:** Intraventricular catheter (ventriculostomy). * **Cushing’s Triad:** A late reflex to maintain cerebral perfusion; it is the physiological opposite of shock (which presents with tachycardia and hypotension). * **Normal ICP:** 5–15 mmHg. Treatment is usually initiated when ICP >20–22 mmHg. * **First-line Management:** Head end elevation (30°), sedation, and osmotic therapy (Mannitol or Hypertonic saline).

Question 113: Which of the following is NOT used in the treatment of rib fracture?

A. Strapping (Correct Answer)
B. Analgesic medication
C. Incentive spirometry
D. Chest physiotherapy

Explanation: **Explanation:** The primary goal in managing rib fractures is **pain control** and the **prevention of pulmonary complications** (atelectasis and pneumonia). **Why Strapping is NOT used (Correct Option):** Historically, "strapping" or tight circumferential bandaging was used to stabilize the chest wall. However, this is now **strictly contraindicated**. Strapping restricts chest wall expansion, leading to decreased tidal volume, alveolar collapse (atelectasis), and retention of secretions. This significantly increases the risk of secondary pneumonia, which is a leading cause of mortality in elderly patients with rib fractures. **Why other options are used:** * **Analgesic medication (B):** This is the cornerstone of management. Effective pain relief (via NSAIDs, opioids, or intercostal nerve blocks) allows the patient to breathe deeply and cough effectively. * **Incentive Spirometry (C) & Chest Physiotherapy (D):** These are essential components of pulmonary toilet. They encourage lung expansion and help clear bronchial secretions, preventing the "vicious cycle" of pain → shallow breathing → atelectasis → pneumonia. **High-Yield Clinical Pearls for NEET-PG:** * **Most common ribs fractured:** Ribs 4 to 9 (the mid-shaft is the weakest point). * **First and Second Rib Fractures:** Indicate high-energy trauma; always screen for associated injuries to the aorta, subclavian vessels, or brachial plexus. * **Lower Rib Fractures (10-12):** Associated with injuries to the liver (right side) and spleen (left side). * **Flail Chest:** Defined as $\geq$ 3 adjacent ribs fractured in $\geq$ 2 places, resulting in paradoxical respiration. * **Gold Standard for Pain in Multiple Fractures:** Epidural analgesia.

Question 114: Decompression in tension pneumothorax can be done by inserting a large-bore needle in which location?

A. First intercostal space
B. Second intercostal space (Correct Answer)
C. Third intercostal space
D. None of the above

Explanation: **Explanation** Tension pneumothorax is a life-threatening emergency where a "one-way valve" mechanism allows air to enter the pleural space but prevents it from escaping. This leads to increased intrapleural pressure, causing mediastinal shift, compression of the great veins (decreasing venous return), and eventual obstructive shock. **Why Option B is Correct:** The traditional and most widely taught site for emergency needle decompression is the **second intercostal space (2nd ICS) in the mid-clavicular line (MCL)**. This location is preferred because it is easily accessible and avoids major hilar structures. The needle should be inserted just **above the third rib** to avoid damaging the neurovascular bundle (intercostal artery, vein, and nerve) which runs along the inferior border of the ribs. **Why Other Options are Incorrect:** * **Option A (1st ICS):** This space is too high and is protected by the clavicle, making it difficult to access safely without risking injury to the subclavian vessels. * **Option C (3rd ICS):** While closer to the target, it is not the standard anatomical landmark for decompression in the anterior approach. **High-Yield Clinical Pearls for NEET-PG:** * **Updated ATLS Guidelines (10th Edition):** While the 2nd ICS remains a valid answer for exams, the latest ATLS guidelines now recommend the **4th or 5th intercostal space** (anterior to the mid-axillary line) as the preferred site in adults, as the chest wall is often thinner there, ensuring the needle actually reaches the pleural space. * **Clinical Diagnosis:** Tension pneumothorax is a **clinical diagnosis**. You must never wait for an X-ray to confirm it; immediate decompression is mandatory. * **Definitive Treatment:** Needle decompression is only a temporary life-saving measure. It must always be followed by the insertion of an **Intercostal Drainage (ICD) tube**, typically in the "Safe Triangle" (5th ICS, mid-axillary line).

Question 115: During dental extraction, a tuberosity fracture is noted where the fractured segment remains attached to the mucoperiosteum with an intact blood supply. What is the appropriate treatment?

A. Remove the fractured tuberosity
B. Refer to an oral surgeon
C. Elevate a flap and perform transosseous wiring
D. Reposition the fractured fragments and stabilize with sutures (Correct Answer)

Explanation: ### Explanation The maxillary tuberosity is a vital anatomical structure that provides support for the maxillary molar teeth and future prosthetic appliances. A fracture during extraction is a known complication, often occurring due to ankylosis of the molar or an oversized maxillary sinus. **Why Option D is Correct:** The management of a tuberosity fracture depends on the size of the fragment and the status of the blood supply. If the fractured segment is **large** and remains **attached to the mucoperiosteum**, the blood supply is preserved. In such cases, the priority is to salvage the bone. The correct procedure is to **reposition the fragment** into its original anatomical location and **stabilize it using sutures** (and sometimes splinting). The extraction of the tooth should be deferred for 6–8 weeks to allow for bony union, after which the tooth can be removed surgically. **Why Other Options are Wrong:** * **Option A:** Removing the fractured tuberosity is only indicated if the fragment is small, completely detached from the soft tissue (loss of blood supply), or if it becomes infected. Routine removal leads to a large oroantral communication (OAC) and loss of alveolar ridge height. * **Option B:** While a general dentist may refer, the "appropriate treatment" in a surgical exam refers to the clinical procedure itself. * **Option C:** Transosseous wiring is invasive and unnecessary for a tuberosity fracture; soft tissue stabilization via sutures is usually sufficient for healing. **Clinical Pearls for NEET-PG:** * **Primary Cause:** Excessive force during the extraction of an isolated maxillary third molar. * **Immediate Sign:** Hearing a "crack" followed by the mobility of the entire alveolar process including adjacent teeth. * **Complication:** If the fragment is removed, it often results in a large **Oroantral Communication (OAC)**. * **Management Rule:** If the fragment is attached to periosteum → **Save it** (Reposition + Suture). If the fragment is detached/free → **Remove it** and treat as an OAC.

Question 116: Pringle maneuver may be required for the treatment of which of the following conditions?

A. Injury to the tail of the pancreas
B. Mesenteric ischemia
C. Bleeding esophageal varices
D. Liver laceration (Correct Answer)

Explanation: **Explanation:** The **Pringle maneuver** is a surgical technique used to control significant hepatic hemorrhage during trauma or elective liver surgery. It involves the clamping of the **hepatoduodenal ligament**, which contains the **Portal Triad**: the Portal Vein, Hepatic Artery, and Common Bile Duct. **1. Why Liver Laceration is Correct:** In cases of severe liver trauma, clamping the portal triad temporarily halts the inflow of blood to the liver (both arterial and venous). This allows the surgeon to visualize the injury site in a relatively bloodless field and perform definitive repair (e.g., hepatorrhaphy or packing). If bleeding continues despite a successful Pringle maneuver, it indicates a retrohepatic vena cava or hepatic vein injury. **2. Why Other Options are Incorrect:** * **A. Injury to the tail of the pancreas:** This area is located in the left upper quadrant, near the splenic hilum. Blood supply is derived from the splenic artery, not the hepatic inflow. * **B. Mesenteric ischemia:** This involves the Superior or Inferior Mesenteric Arteries. Clamping the hepatoduodenal ligament would not address the pathology and could potentially worsen ischemia. * **C. Bleeding esophageal varices:** While these are related to portal hypertension, the Pringle maneuver is an operative trauma technique, not a treatment for variceal bleeding (which is managed via endoscopy, pharmacotherapy, or TIPS). **High-Yield Clinical Pearls for NEET-PG:** * **Maximum Time:** The maneuver can typically be applied for **60 minutes** in a healthy liver (intermittent clamping is preferred). * **Anatomical Landmark:** The clamp is placed across the **Foramen of Winslow** (epiploic foramen). * **Failure of Maneuver:** If bleeding persists after clamping, suspect injury to the **Hepatic Veins** or the **Retrohepatic Inferior Vena Cava**.

Question 117: What metabolic anomaly is seen in cases of hemorrhagic shock?

A. Metabolic acidosis (Correct Answer)
B. Respiratory acidosis
C. Respiratory alkalosis
D. Metabolic alkalosis

Explanation: **Explanation:** **1. Why Metabolic Acidosis is Correct:** In hemorrhagic shock, significant blood loss leads to decreased circulating volume (hypovolemia), which results in **reduced tissue perfusion** and oxygen delivery. To maintain energy production, cells shift from aerobic to **anaerobic metabolism**. This process produces **lactic acid** as a byproduct. The accumulation of lactate and hydrogen ions leads to a decrease in blood pH, resulting in **High Anion Gap Metabolic Acidosis**. **2. Why the Other Options are Incorrect:** * **Respiratory Acidosis (B):** This occurs due to alveolar hypoventilation (e.g., airway obstruction or CNS depression). In shock, the body typically compensates by *increasing* the respiratory rate to blow off $CO_2$. * **Respiratory Alkalosis (C):** While early shock may cause hyperventilation (leading to a temporary drop in $pCO_2$), the primary and defining metabolic hallmark of shock is the underlying acidotic state due to hypoperfusion. * **Metabolic Alkalosis (D):** This is usually caused by acid loss (vomiting) or bicarbonate gain. It is not a feature of acute hemorrhage; however, it can sometimes occur *after* massive blood transfusions due to the metabolism of citrate into bicarbonate (Post-transfusion alkalosis). **3. Clinical Pearls for NEET-PG:** * **Serum Lactate:** This is the most sensitive marker for the severity of tissue hypoperfusion and is used to monitor the adequacy of resuscitation. * **Base Deficit:** A high base deficit in trauma patients is a strong predictor of the need for blood transfusion and mortality. * **Lethal Triad of Trauma:** Acidosis, Coagulopathy, and Hypothermia. * **Initial Compensation:** The body initially attempts to compensate for metabolic acidosis via **respiratory compensation** (Kussmaul breathing/tachypnea) to lower $pCO_2$.

Question 118: In a patient in shock where IV cannulation is not possible, within what time frame should an intraosseous line be established for fluid resuscitation?

A. 1 minute
B. 1.5 minutes (Correct Answer)
C. 2 minutes
D. 2.5 minutes

Explanation: **Explanation:** In emergency trauma management, establishing vascular access is the highest priority for fluid resuscitation. According to the **Advanced Trauma Life Support (ATLS)** guidelines, if peripheral intravenous (IV) access cannot be established within **two attempts or 90 seconds (1.5 minutes)**, an intraosseous (IO) line should be initiated immediately. **Why 1.5 minutes is correct:** The "90-second rule" is a standardized clinical threshold. In patients with profound shock or collapsed veins, repeated unsuccessful IV attempts lead to critical delays in resuscitation. The IO route provides a non-collapsible entry point into the systemic circulation via the bone marrow venous plexus, offering flow rates and drug efficacy comparable to central venous access. **Analysis of Incorrect Options:** * **A (1 minute):** While speed is essential, 60 seconds is often insufficient to perform two proper peripheral IV attempts in a trauma setting. * **C & D (2 and 2.5 minutes):** These timeframes are considered excessive. In a patient in hemorrhagic shock, delaying access beyond 90 seconds significantly increases the risk of irreversible organ damage and cardiac arrest. **High-Yield Clinical Pearls for NEET-PG:** * **Preferred Site:** The **proximal tibia** (anteromedial surface, 2cm distal to the tibial tuberosity) is the most common site in both adults and children. Other sites include the distal tibia and proximal humerus. * **Contraindications:** Fracture of the target bone, overlying skin infection (cellulitis), or previous IO attempt in the same bone. * **Fluid/Drugs:** *Anything* that can be given IV (blood, crystalloids, vasopressors) can be given IO. * **Removal:** IO needles are temporary and should be removed within 24 hours to prevent osteomyelitis.

Question 119: What is the main cause of shock?

A. Hypoxia
B. Hypotension
C. Hypoperfusion of tissues (Correct Answer)
D. Not recalled

Explanation: **Explanation:** **1. Why "Hypoperfusion of tissues" is correct:** Shock is fundamentally defined as a state of **circulatory failure** that results in inadequate cellular oxygen delivery and utilization. The hallmark of shock is **tissue hypoperfusion**, where the blood flow is insufficient to meet the metabolic demands of the organs. This leads to a shift from aerobic to anaerobic metabolism, resulting in lactic acidosis, cellular dysfunction, and eventually multiorgan failure. Regardless of the etiology (hypovolemic, cardiogenic, obstructive, or distributive), the common denominator is the failure of the circulatory system to perfuse tissues adequately. **2. Why other options are incorrect:** * **Hypoxia (Option A):** While hypoxia (low oxygen levels in tissues) is a *consequence* of shock, it is not the definition of shock itself. Hypoxia can occur without shock (e.g., high altitude or respiratory failure). Shock specifically refers to the failure of the *delivery system* (perfusion). * **Hypotension (Option B):** Hypotension is a *clinical sign* of shock, not the cause or definition. In the early stages (Compensated Shock), the body maintains blood pressure through compensatory mechanisms like tachycardia and vasoconstriction. Therefore, a patient can be in shock even with a normal blood pressure. **3. NEET-PG High-Yield Clinical Pearls:** * **Earliest sign of shock:** Tachycardia (except in neurogenic shock, where bradycardia occurs). * **Best indicator of tissue perfusion:** Urine output (aim for >0.5 ml/kg/hr) and Serum Lactate levels (reflects anaerobic metabolism). * **Golden Hour:** The initial period following injury where prompt resuscitation can prevent irreversible shock. * **Classification:** Remember that **Hypovolemic shock** is the most common type in surgical trauma patients.

Question 120: Which of the following statements is true about trauma injury?

A. Seat belt can cause pancreato-duodenal injury. (Correct Answer)
B. Late death is caused by sepsis.
C. Damage control surgery (DCS) is used to control major bleeding and to prevent contamination of the peritoneal cavity.
D. In DCS, the abdomen is closed in layers to prevent evisceration.

Explanation: **Explanation:** **1. Why Option A is Correct:** The **Seat Belt Syndrome** occurs during rapid deceleration when the lap belt acts as a fulcrum. The abdominal viscera are compressed against the vertebral column. Because the **pancreas and duodenum** are retroperitoneal structures fixed against the spine, they are highly susceptible to crush injuries and transection in this mechanism. **2. Analysis of Incorrect Options:** * **Option B:** While sepsis is a major cause of late mortality, the **Trimodel Distribution of Death** in trauma classifies "Late Deaths" (days to weeks post-injury) as being caused by **Sepsis and Multi-Organ Dysfunction Syndrome (MODS)**. However, in the context of standard surgical teaching and recent trauma trends, Option A is a more specific mechanical fact. (Note: In many exams, B is considered partially true, but A is the definitive anatomical-clinical correlation). * **Option C:** This is a partial definition. Damage Control Surgery (DCS) is specifically aimed at addressing the **"Lethal Triad"** (Acidosis, Coagulopathy, and Hypothermia). While it controls bleeding and contamination, its primary goal is physiological restoration rather than definitive anatomical repair. * **Option D:** In DCS, the abdomen is **never closed in layers**. To prevent **Abdominal Compartment Syndrome**, the skin is left open or covered with a temporary dressing (e.g., Bogota bag or VAC dressing). Definitive closure is delayed until the patient is physiologically stable. **High-Yield Clinical Pearls for NEET-PG:** * **Lethal Triad of Trauma:** Hypothermia, Coagulopathy, and Metabolic Acidosis. * **Seat Belt Sign:** Ecchymosis on the abdominal wall; highly predictive of mesenteric or hollow viscus injury. * **DCS Stages:** 1. Initial Laparotomy (Hemorrhage/Contamination control), 2. ICU Resuscitation (Rewarming/Correction of coagulopathy), 3. Planned Re-operation (Definitive repair). * **Most common organ injured in blunt trauma:** Spleen. * **Most common organ injured in stab wounds:** Liver.

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Spinal Trauma

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Extremity Trauma

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Vascular Trauma

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Genitourinary Trauma

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Trauma — MCQs

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