Trauma Practice Questions

Q: What is the initial fluid replacement strategy for a 20% blood loss?

Colloids and Crystalloids. **Explanation:** The management of hemorrhagic shock is a high-yield topic for NEET-PG. According to the **ATLS (Advanced Trauma Life Support)** classification of hemorrhagic shock, a **20% blood loss** falls under **Class II Hemorrhage** (15–30% loss). **Why Option A is Correct:** For Class II hemorrhage, the initial management focuses on restoring intravascular volume to maintain organ perfusion. The standard protocol involves the use of **Crystalloids** (like Normal Saline or Ringer’s Lactate) to replace volume. While crystalloids are the first line, **Colloids** (like Albumin or Hydroxyethyl starch) are also effective volume expanders that stay in the intravascular space longer. In clinical practice and traditional surgical teaching, a combination or a choice between these two is the "initial" strategy before blood products are considered. **Why Other Options are Incorrect:** * **B & C (Cryoprecipitate/Plasma):** These are blood components used to correct coagulopathy (massive transfusion protocols) rather than as initial volume expanders for moderate (20%) blood loss. * **D (Packed Red Blood Cells):** PRBCs are generally indicated for **Class III (30–40%)** and **Class IV (>40%)** hemorrhage. In Class II, the body’s compensatory mechanisms and crystalloid resuscitation are usually sufficient to maintain oxygen delivery. **Clinical Pearls for NEET-PG:** * **Class I ( 40%):** Lethargy, negligible urine output; **Massive Transfusion Protocol (MTP).** * **Golden Rule:** Always start with 1 liter of warmed isotonic crystalloid in adults.

Q: In crush syndrome, what is a common complication?

Renal failure. **Explanation:** **Crush Syndrome** (also known as Bywaters' Syndrome) occurs following the release of pressure from a crushed limb, leading to systemic manifestations. **Why Renal Failure is the Correct Answer:** The hallmark of crush syndrome is **Rhabdomyolysis**. When muscle tissue is crushed and then reperfused, large amounts of **Myoglobin** are released into the circulation. Myoglobin is nephrotoxic; it causes Acute Kidney Injury (AKI) through three mechanisms: 1. **Direct tubular toxicity.** 2. **Intratubular cast formation** (obstructing the nephron). 3. **Renal vasoconstriction** leading to ischemia. This often results in "Tea-colored" or "Cola-colored" urine and is the most significant life-threatening complication. **Why Other Options are Incorrect:** * **B. Liver failure:** While systemic inflammatory response syndrome (SIRS) can occur, the liver is not the primary target organ in crush injuries. * **C. Cardiac failure:** While hyperkalemia (released from damaged cells) can cause **cardiac arrhythmias** or arrest, primary pump failure (cardiac failure) is not the standard complication of the syndrome itself. * **D. Endocrine crisis:** Crush syndrome involves metabolic disturbances (acidosis, hyperkalemia, hypocalcemia), but it does not typically trigger an acute endocrine crisis (like Addisonian or Thyroid storm). **High-Yield Clinical Pearls for NEET-PG:** * **Early Management:** Aggressive fluid resuscitation (Normal Saline) is the most important step to prevent renal failure. * **Urine Alkalinization:** Sodium Bicarbonate is used to prevent myoglobin precipitation in tubules. * **Electrolyte Triad:** Hyperkalemia, Hyperphosphatemia, and Hypocalcemia. * **Compartment Syndrome:** Often precedes or accompanies crush syndrome; definitive treatment is fasciotomy if pressures are elevated.

Q: What is the first management step for a patient with a suspected cervical spine fracture?

Cervical spine immobilization. **Explanation:** The management of a trauma patient follows the **ATLS (Advanced Trauma Life Support)** protocol. In any patient with a suspected cervical spine (C-spine) injury—particularly those with blunt trauma above the clavicle, a high-velocity mechanism, or altered mental status—the absolute first step is **Cervical Spine Immobilization**. **Why B is correct:** The primary goal is to prevent secondary spinal cord injury. Any movement of an unstable fracture can lead to permanent neurological deficit or respiratory arrest (if the injury is above C3-C5). Immobilization is achieved using a rigid cervical collar, lateral sandbags, and tape, or manual in-line stabilization (MILS) during airway maneuvers. **Why the other options are incorrect:** * **A. Intubation:** While "Airway" is the first priority in the ABCDE sequence, it must be managed **simultaneously** with C-spine protection. If intubation is required, it must be done using MILS to prevent neck extension. * **C. X-ray of the spine:** Imaging is part of the "Secondary Survey" or the adjuncts to the primary survey. Clinical stabilization always precedes radiological diagnosis. * **D. Tracheostomy:** This is a surgical airway used only if endotracheal intubation fails or is contraindicated (e.g., massive facial trauma). It is not a first-line step for C-spine fractures. **Clinical Pearls for NEET-PG:** * **Nexus Criteria & Canadian C-Spine Rules:** Used to clinically rule out the need for imaging. * **Imaging of Choice:** MDCT (Multidetector CT) from the occiput to T1 is now the gold standard, replacing the 3-view X-ray series. * **Airway Management:** If a C-spine injury is suspected and the airway is compromised, **Orotracheal intubation with Manual In-Line Stabilization (MILS)** is the preferred method. Avoid hyperextension of the neck.

Q: What is the investigation of choice for the evaluation of upper abdominal trauma?

Computed Tomography (CT). **Explanation:** **Contrast-Enhanced Computed Tomography (CECT)** is the investigation of choice (Gold Standard) for evaluating upper abdominal trauma in **hemodynamically stable** patients. Its superiority lies in its high sensitivity and specificity for identifying the exact grade of solid organ injuries (liver, spleen, kidneys), detecting retroperitoneal injuries, and identifying active extravasation of contrast ("blush"), which guides the decision between conservative management and surgical intervention. **Analysis of Options:** * **Ultrasound (FAST):** While Focused Assessment with Sonography for Trauma (FAST) is the initial screening tool used in the emergency room, it is limited. It can detect free intraperitoneal fluid (hemoperitoneum) but cannot accurately grade organ injury or visualize the retroperitoneum. It is the investigation of choice for **hemodynamically unstable** patients. * **Scintigraphy:** Nuclear medicine scans have no role in the acute management of trauma due to their time-consuming nature and poor anatomical resolution. * **MRI:** Although highly detailed, MRI is impractical in trauma settings due to long scan times, difficulty in monitoring the patient inside the magnet, and incompatibility with metallic resuscitation equipment. **Clinical Pearls for NEET-PG:** * **Hemodynamically Stable + Blunt Trauma:** CECT is the best investigation. * **Hemodynamically Unstable + Blunt Trauma:** FAST or Diagnostic Peritoneal Lavage (DPL) is preferred. * **Hollow Viscus Injury:** CT is less sensitive for bowel/mesenteric injuries compared to solid organ injuries; look for "free air" or "thickened bowel loops." * **Grade of Injury:** The AAST (American Association for the Surgery of Trauma) grading for liver and spleen is primarily based on CT findings.

Q: All of the following are features of Systemic Inflammatory Response Syndrome (SIRS) except?

Respiratory rate > 24/minute and PaCO2 38^\circ\text{C}$ ($100.4^\circ\text{F}$) or $ 90$ beats per minute. 3. **Respiratory Rate:** $> 20$ breaths per minute **OR** **PaCO2** $ 12,000/\text{mm}^3$, $ 10\%$ immature (band) forms. **Why Option D is the Correct Answer (The "Except"):** The criteria for SIRS specify a respiratory rate of **$> 20$ breaths/minute** and a **PaCO2 of $ 24$ and $ 90$ bpm) as a core criterion. ### High-Yield Clinical Pearls for NEET-PG: * **Sepsis vs. SIRS:** Sepsis is defined as SIRS + a documented or suspected source of infection. * **qSOFA Score:** In recent years, the Sepsis-3 guidelines emphasize the **qSOFA score** (Altered mental status, Systolic BP $\leq 100\text{ mmHg}$, RR $\geq 22/\text{min}$) over SIRS for predicting poor outcomes in sepsis. * **PaCO2 Logic:** Tachypnea leads to "blowing off" CO2, resulting in respiratory alkalosis; hence, a *low* PaCO2 ($< 32$) is the marker, not a high one.

Q: What is the meaning of the French word "debridement"?

Cut open. **Explanation:** The term **"Debridement"** is derived from the French word *débridement*, which literally means **"to unbridle"** or **"to cut open"** (from *dé-* 'un-' + *bride* 'bridle'). In a surgical context, it refers to the act of incising constricting bands of tissue or opening a wound to explore its depths. While modern clinical usage often equates debridement with the removal of necrotic, infected, or foreign material to promote healing, the **etymological origin** specifically refers to the act of "cutting open" or releasing tension. **Analysis of Options:** * **A. Cut open (Correct):** This is the literal translation. In trauma surgery, this involves opening the wound or fascia to relieve pressure and expose the underlying anatomy. * **B. Debulk:** This refers to the surgical reduction of the size of a tumor (cytoreduction), not the initial opening of a wound. * **C. Sanitize:** While debridement helps in cleaning a wound, "sanitize" refers to the reduction of microbial populations (disinfection), which is a chemical or mechanical process rather than the act of cutting. * **D. Rehydration:** This refers to the restoration of fluid balance and has no linguistic or surgical connection to debridement. **Clinical Pearls for NEET-PG:** * **Biological Debridement:** Uses sterile maggots (*Lucilia sericata*) which secrete enzymes that dissolve necrotic tissue while sparing healthy tissue. * **Enzymatic Debridement:** Uses topical agents like Collagenase. * **Surgical Debridement:** The "Gold Standard" for contaminated trauma wounds; it follows the principle of converting a "dirty" wound into a "clean" surgical wound. * **Priority:** In trauma (e.g., gas gangrene or compartment syndrome), the primary goal of debridement is the release of tension and removal of the "nidus" of infection.

Q: What is the least percentage of blood volume loss required to cause hemorrhagic shock?

20%. ### Explanation The classification of hemorrhagic shock is based on the **ATLS (Advanced Trauma Life Support)** guidelines, which categorize blood loss into four stages. **Why 20% is the correct answer:** Hemorrhagic shock is clinically defined as a state of cellular hypoxia due to reduced perfusion. While **Class I shock** involves loss of up to 15% of blood volume (usually compensated with minimal symptoms), **Class II shock** begins when blood loss exceeds **15% (ranging from 15% to 30%)**. At this threshold—specifically around **20%**—the body’s compensatory mechanisms (like tachycardia and narrowed pulse pressure) become clinically evident. Therefore, 20% represents the minimum significant threshold where the physiological signs of shock (Class II) are established. **Analysis of Incorrect Options:** * **30% (Option A):** This marks the transition from Class II to **Class III shock**. At this stage, classic signs like hypotension and marked mental status changes appear. It is a state of shock, but not the *least* percentage required. * **40% (Option B):** This represents **Class IV shock**, which is life-threatening and requires immediate massive transfusion. * **50% (Option D):** This is extreme exsanguination, far exceeding the initial threshold for shock. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest Sign of Shock:** Tachycardia (Heart Rate >100 bpm). * **Earliest Sign of Class III Shock:** Hypotension (Fall in systolic BP). * **Pulse Pressure:** It narrows in Class II shock due to a rise in diastolic pressure (catecholamine response). * **Urine Output:** It remains normal in Class I and II but drops significantly (<15-20 ml/hr) in Class III. * **Fluid Management:** Class I and II usually respond to crystalloids; Class III and IV require blood products.

Question 1

According to Killey and Kay, which of the following is NOT an absolute indication for tooth removal in cases of fracture?

Accepted Answer

A tooth that is intact but present in the line of fracture and shows no evidence of mobility or inflammation.

Answer

Vertical fracture of the root

Answer

Pre-existing periapical lesion

Answer

Luxation and subluxation of the tooth from the socket

Question 2

What is the initial fluid replacement strategy for a 20% blood loss?

Accepted Answer

Colloids and Crystalloids

Answer

Cryoprecipitate

Answer

Plasma

Answer

Packed red blood cells

Question 3

In crush syndrome, what is a common complication?

Accepted Answer

Renal failure

Answer

Liver failure

Answer

Cardiac failure

Answer

Endocrine crisis

Question 4

A 25-year-old male presents with abdominal pain following blunt abdominal trauma sustained in a road traffic accident. On examination, his blood pressure is 120/80 mmHg and pulse rate is 72 bpm. What is the next best step in the management of this patient?

Accepted Answer

Focused Assessment with Sonography for Trauma (FAST) scan

Answer

Diagnostic Peritoneal Lavage

Answer

Non-contrast computed tomography (NCCT) of the abdomen

Answer

Contrast-enhanced computed tomography (CECT) of the abdomen

Question 5

What is the first management step for a patient with a suspected cervical spine fracture?

Accepted Answer

Cervical spine immobilization

Answer

Intubation

Answer

X-ray of the spine

Answer

Tracheostomy

Question 6

What is the investigation of choice for the evaluation of upper abdominal trauma?

Accepted Answer

Computed Tomography (CT)

Answer

Ultrasound (USG)

Answer

Scintigraphy

Answer

Magnetic Resonance Imaging (MRI)

Question 7

All of the following are features of Systemic Inflammatory Response Syndrome (SIRS) except?

Accepted Answer

Respiratory rate > 24/minute and PaCO2 < 22 mmHg

Answer

WBC count > 11,000/mm3 or < 4,000/mm3

Answer

Temperature > 38°C

Answer

Pulse rate > 90/minute

Question 8

What is the meaning of the French word "debridement"?

Accepted Answer

Cut open

Answer

Debulk

Answer

Sanitize

Answer

Rehydration

Question 9

A patient with a stab injury to the anterior abdomen presents with a tag of omentum protruding the abdominal wall near the umbilicus. On evaluation, he is hemodynamically stable and shows no signs of peritonitis. What should be the initial management?

Accepted Answer

CECT Abdomen

Answer

FAST scan

Answer

Exploratory laparotomy

Answer

Local wound exploration and suturing

Question 10

What is the least percentage of blood volume loss required to cause hemorrhagic shock?

Accepted Answer

20%

Answer

30%

Answer

40%

Answer

50%

Trauma — MCQs

Trauma — MCQs

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