Trauma Practice Questions

Q: In the Glasgow Coma Scale, which of the following is not a parameter?

Sensory response. The **Glasgow Coma Scale (GCS)** is a standardized clinical tool used to assess the level of consciousness in patients with acute brain injury. It evaluates three specific physiological responses, often remembered by the mnemonic **"EVM"**. ### Why "Sensory Response" is the Correct Answer The GCS is designed to measure objective behavioral responses to stimuli. While the scale utilizes sensory input (such as verbal commands or painful stimuli) to elicit a reaction, it does **not** formally grade the patient’s sensory perception or dermatomal sensation. Therefore, **Sensory response** is not a parameter of the GCS. ### Analysis of Other Options * **A. Verbal response (V):** Scored from 1 to 5. It assesses orientation and cognitive integration. * **B. Eye opening (E):** Scored from 1 to 4. It assesses the arousal mechanism of the brainstem (Reticular Activating System). * **C. Motor response (M):** Scored from 1 to 6. It is the most significant predictor of ultimate clinical outcome. ### High-Yield Clinical Pearls for NEET-PG * **Score Range:** The total score ranges from a **minimum of 3** (deep coma/death) to a **maximum of 15** (fully awake). There is no score of 0. * **Head Injury Classification:** * 13–15: Mild Head Injury * 9–12: Moderate Head Injury * **≤ 8: Severe Head Injury** (Indicative of coma; "GCS of 8, intubate"). * **Modified GCS:** In intubated patients, the verbal score is replaced by the suffix 'T' (e.g., GCS 5T). * **GCS-P:** A newer variant that includes **Pupillary reactivity** (GCS score minus the number of non-reactive pupils) to provide better prognostic data.

Q: A patient with a history of chest trauma presents to the emergency department with a BP of 90/70 mm Hg and a pulse rate of 120/min. The patient is observed to be short of breath, using accessory muscles of respiration. The JVP is not elevated. What is the most likely diagnosis?

Massive Hemothorax. ### Explanation The patient presents with signs of **hypovolemic shock** (hypotension and tachycardia) and respiratory distress following chest trauma. The clinical differentiator here is the **Jugular Venous Pressure (JVP)**. **1. Why Massive Hemothorax is correct:** Massive hemothorax is defined as >1500 ml of blood (or 1/3 of the patient's blood volume) in the pleural space. This leads to two primary issues: * **Hypovolemic Shock:** Significant blood loss leads to decreased preload, resulting in hypotension and **flat neck veins (low JVP)**. * **Respiratory Distress:** Blood in the pleural space causes lung collapse and mediastinal shift, leading to dyspnea and decreased breath sounds on the affected side. **2. Why other options are incorrect:** * **Tension Pneumothorax:** While it causes hypotension and respiratory distress, it is characterized by **distended neck veins (elevated JVP)** due to increased intrathoracic pressure impeding venous return. Percussion would reveal hyper-resonance, whereas hemothorax reveals dullness. * **Cardiac Tamponade:** This presents with **Beck’s Triad** (hypotension, muffled heart sounds, and **elevated JVP**). Unlike hemothorax, the lungs are usually clear on auscultation, and there is no significant respiratory distress unless associated with other injuries. **3. Clinical Pearls for NEET-PG:** * **The JVP Rule:** In a trauma patient with shock and respiratory distress: * **Low JVP/Flat veins** = Massive Hemothorax. * **High JVP/Distended veins** = Tension Pneumothorax or Cardiac Tamponade. * **Percussion:** Dullness = Hemothorax; Hyper-resonance = Pneumothorax. * **Management:** The initial treatment for massive hemothorax is a wide-bore chest tube (Intercostal Drainage). An immediate output of **>1500 ml** or a continuous output of **200 ml/hr for 2–4 hours** is an indication for urgent **Thoracotomy**.

Q: A patient presents with breathlessness following a road traffic accident. Which of the following is the best method to differentiate between cardiac tamponade and tension pneumothorax?

Breathing sounds. **Explanation:** In the setting of thoracic trauma, both **Cardiac Tamponade** and **Tension Pneumothorax** are life-threatening conditions that present with obstructive shock, hypotension, and distended neck veins (elevated JVP). The most reliable clinical finding to differentiate between them at the bedside is the **auscultation of breath sounds.** 1. **Why "Breathing Sounds" is correct:** * **Tension Pneumothorax:** Characterized by **absent or significantly diminished breath sounds** on the affected side, along with hyper-resonance on percussion and tracheal deviation. * **Cardiac Tamponade:** Breath sounds remain **normal and bilateral** because the pathology is confined to the pericardial sac, not the pleural space. 2. **Why other options are incorrect:** * **Jugular Venous Pressure (JVP):** Both conditions cause increased JVP due to impaired venous return to the heart. Therefore, it cannot be used to distinguish them. * **Pulse Pressure & Pulse Volume:** Both conditions lead to a state of shock characterized by tachycardia, low pulse volume, and narrowed pulse pressure. While *Pulsus Paradoxus* is a classic sign of tamponade, it can also occur in severe tension pneumothorax. **Clinical Pearls for NEET-PG:** * **Beck’s Triad (Cardiac Tamponade):** Hypotension, Distended neck veins, and Muffled heart sounds. * **The "Diamond" Rule:** If a patient has respiratory distress + hypotension + distended neck veins: * *Absent breath sounds* = Tension Pneumothorax. * *Normal breath sounds* = Cardiac Tamponade. * **Immediate Management:** Tension pneumothorax requires immediate **needle thoracocentesis** (5th ICS mid-axillary line in adults), while tamponade requires **pericardiocentesis**.

Q: Which of the following is NOT a side effect of massive blood transfusion?

Hypokalemia. **Explanation** Massive Blood Transfusion (MBT) is defined as the replacement of >10 units of PRBCs in 24 hours or >4 units in 1 hour. The correct answer is **Hypokalemia** because MBT typically causes **Hyperkalemia**, not hypokalemia. **1. Why Hypokalemia is the correct answer (The Exception):** During storage, red blood cells undergo a "storage lesion" where the Na+/K+ ATPase pump fails due to cold temperatures and lack of ATP. This causes potassium to leak out of the cells into the plasma. Consequently, transfusing old stored blood leads to **Hyperkalemia**. *Note:* Transient hypokalemia may occur later as transfused cells resume metabolic activity and take up potassium, or due to metabolic alkalosis from citrate metabolism, but the classic acute complication tested in exams is hyperkalemia. **2. Why the other options are wrong (Actual Side Effects):** * **Hypothermia (A):** Blood is stored at 4°C. Rapid infusion of cold blood cools the core temperature, shifting the oxyhemoglobin curve to the left and worsening coagulopathy. * **Hypocalcemia (B):** Citrate is used as an anticoagulant in blood bags. It chelates ionized calcium in the recipient’s blood, leading to tetany or arrhythmias. * **Hypomagnesemia (C):** Similar to calcium, citrate also binds to magnesium, leading to decreased serum magnesium levels. **High-Yield Clinical Pearls for NEET-PG:** * **Lethal Triad of Trauma:** Acidosis, Coagulopathy, and Hypothermia. * **Metabolic Alkalosis:** Citrate is metabolized by the liver into bicarbonate, often leading to alkalosis rather than acidosis in the post-transfusion phase. * **Dilutional Coagulopathy:** MBT with only PRBCs leads to a deficiency of platelets and clotting factors (V and VIII). * **TRALI:** The most common cause of transfusion-related fatalities.

Q: What is the source of a chronic subdural hematoma?

Venous. **Explanation:** The correct answer is **Venous**. A **Subdural Hematoma (SDH)**, whether acute or chronic, occurs due to the rupture of **bridging veins**. These veins traverse the subdural space as they drain blood from the cerebral cortex into the dural venous sinuses (primarily the Superior Sagittal Sinus). In **Chronic Subdural Hematoma (cSDH)**, which typically occurs in elderly patients or those with chronic alcoholism, brain atrophy leads to an increase in the distance between the cortex and the dura. This stretches the bridging veins, making them highly susceptible to shearing even with trivial trauma. The bleeding is low-pressure (venous), allowing the hematoma to accumulate slowly over weeks to months. **Analysis of Incorrect Options:** * **A. Arterial:** Arterial bleeding is the hallmark of **Epidural Hematoma (EDH)**, most commonly involving the Middle Meningeal Artery. Arterial bleeds are high-pressure and present acutely. * **C. Capillary:** Capillary oozing is not a recognized primary source for major intracranial hematomas like SDH. * **D. None of the above:** Incorrect, as the venous origin is well-established. **Clinical Pearls for NEET-PG:** * **Imaging:** On CT, cSDH appears as a **crescent-shaped (concave)** lesion that is **hypodense** (dark) compared to the brain. Acute SDH is hyperdense (white). * **Risk Factors:** Cerebral atrophy (elderly), anticoagulation therapy, and chronic alcoholism. * **Pathophysiology:** The initial clot often liquefies, and a "pseudomembrane" forms. Recurrent micro-bleeding from fragile neo-capillaries in this membrane can cause the hematoma to enlarge over time. * **Management:** Symptomatic cSDH is typically treated with **burr-hole craniostomy** and drainage.

Q: A patient presents with necrotizing cellulitis after a bite on the leg. What is the ideal initial management?

Surgical exploration. **Explanation:** **Necrotizing Cellulitis (Necrotizing Fasciitis)** is a surgical emergency characterized by rapid, widespread destruction of the superficial fascia and subcutaneous fat. The diagnosis is primarily **clinical**. **Why Surgical Exploration is the Correct Answer:** In cases of suspected necrotizing soft tissue infections (NSTI), **surgical exploration and aggressive debridement** is the gold standard for both diagnosis and treatment. Delaying surgery to wait for imaging or lab results significantly increases mortality. The "finger test" (lack of bleeding, "dishwater" pus, and easy blunt dissection of the fascia) during exploration confirms the diagnosis. **Why Other Options are Incorrect:** * **MRI (A) & CT (B):** While imaging may show fascial thickening or subcutaneous gas (pathognomonic), it lacks the sensitivity to rule out early infection. A negative scan should never delay surgery if clinical suspicion is high. * **C-reactive protein (C):** Inflammatory markers like CRP and WBC are often elevated (used in the LRINEC score), but they are non-specific and do not provide a definitive diagnosis or therapeutic benefit in an acute setting. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Hallmark:** "Pain out of proportion" to physical findings and cutaneous anesthesia (due to nerve destruction). * **Hard Signs:** Crepitus, skin necrosis, bullae, and rapid progression. * **LRINEC Score:** Used to distinguish necrotizing from non-necrotizing infections (includes CRP, WBC, Hemoglobin, Sodium, Creatinine, and Glucose). * **Microbiology:** Type I is polymicrobial (common in diabetics); Type II is monomicrobial (Group A Streptococcus). * **Management Rule:** "The sun should not set on a necrotizing infection." Immediate debridement + broad-spectrum antibiotics (e.g., Carbapenem + Clindamycin) is mandatory.

Q: Bristow elevator is used in which approach?

Gillies approach. **Explanation:** The **Bristow elevator** is a specialized surgical instrument used primarily for the reduction of zygomatic arch fractures. **1. Why Gillies approach is correct:** The **Gillies temporal approach** is an extra-oral technique used to reduce fractures of the zygomatic arch. An incision is made in the temporal region (within the hairline), through the skin, subcutaneous tissue, and the temporal fascia. The Bristow elevator is then inserted deep to the deep temporal fascia but superficial to the temporalis muscle. It is slid inferiorly until it reaches the medial aspect of the zygomatic arch, where it is used to exert lateral pressure to "pop" the fractured bone back into its anatomical position. **2. Why the other options are incorrect:** * **Keen’s technique:** This is an **intra-oral approach** for reducing zygomatic arch fractures. An incision is made in the gingivobuccal sulcus (maxillary vestibular incision) behind the zygomaticomaxillary buttress. While a similar elevator (like a Rowes or Laskin elevator) can be used, the Bristow elevator is classically associated with the Gillies temporal approach. * **Both/None:** Since the Bristow elevator is the hallmark instrument specifically designed for the leverage required in the temporal (Gillies) approach, these options are incorrect. **Clinical Pearls for NEET-PG:** * **Anatomical Plane:** In the Gillies approach, the elevator must stay **between the deep temporal fascia and the temporalis muscle** to ensure it reaches the underside of the zygomatic arch. * **Zygomatic Complex Fractures:** The most common clinical sign is "flattening of the cheek" and restricted mouth opening (due to impingement on the coronoid process). * **Other Instruments:** A **Rowe’s zygomatic elevator** is another common instrument used for the same purpose.

Question 1

In the Glasgow Coma Scale, which of the following is not a parameter?

Accepted Answer

Sensory response

Answer

Verbal response

Answer

Eye opening

Answer

Motor response

Question 2

A patient with a history of chest trauma presents to the emergency department with a BP of 90/70 mm Hg and a pulse rate of 120/min. The patient is observed to be short of breath, using accessory muscles of respiration. The JVP is not elevated. What is the most likely diagnosis?

Accepted Answer

Massive Hemothorax

Answer

Tension Pneumothorax

Answer

Cardiac Tamponade

Answer

None of the above

Question 3

A patient presents with breathlessness following a road traffic accident. Which of the following is the best method to differentiate between cardiac tamponade and tension pneumothorax?

Accepted Answer

Breathing sounds

Answer

Pulse pressure

Answer

Pulse volume

Answer

Jugular venous pressure (JVP)

Question 4

Which of the following is NOT a side effect of massive blood transfusion?

Accepted Answer

Hypokalemia

Answer

Hypothermia

Answer

Hypocalcemia

Answer

Hypomagnesemia

Question 5

What is the source of a chronic subdural hematoma?

Accepted Answer

Venous

Answer

Arterial

Answer

Capillary

Answer

None of the above

Question 6

Which of the following statements about hemothorax are correct?

Accepted Answer

Thoracotomy is always done

Answer

Seen in choriocarcinoma

Answer

Supine posture is better than erect posture

Answer

Needle aspiration may be needed for diagnosis

Question 7

A 50-year-old known asthmatic develops sudden onset right-sided chest pain with dyspnea. Chest X-ray reveals hyperlucency on the right side with a shift of the trachea to the left side. What is the best treatment for immediate relief of symptoms?

Accepted Answer

Water seal intercostal drainage on the right side of the chest

Answer

Intravenous morphine

Answer

Nebulization of beta 2 agonist, e.g., salbutamol

Answer

Intravenous aminophylline

Question 8

A patient presents with necrotizing cellulitis after a bite on the leg. What is the ideal initial management?

Accepted Answer

Surgical exploration

Answer

MRI of the leg

Answer

CT of the leg

Answer

C-reactive protein estimation

Question 9

Bristow elevator is used in which approach?

Accepted Answer

Gillies approach

Answer

Keen's technique

Answer

Both of the above

Answer

None

Question 10

A 25-year-old man presents with significant upper gastrointestinal hemorrhage on post-injury day 4 following an automobile accident. Injuries sustained included bilateral closed femur fractures, left pulmonary contusion, and closed head injury. Endoscopic examination reveals an area of confluent ulceration with bleeding in the gastric fundus, and endoscopic hemostasis has failed. What is the appropriate immediate management?

Accepted Answer

Selective arterial infusion of vasopressin into the left gastric artery

Answer

Lavage of gastric contents with iced saline

Answer

Urgent total gastrectomy

Answer

Insertion of a Sengstaken-Blakemore balloon

Trauma — MCQs

Trauma — MCQs

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