Trauma — MCQs
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Patient comes with crush injury to upper limb, doctor is concerned about gangrene and sepsis. What scoring system can help decide between amputation and limb salvage?
Most common organ affected in underwater blast?
Under what circumstances is a countercoup injury most likely to occur?
A patient was brought to the ER following a road traffic accident. On examination, the patient opens his eyes to a painful stimulus, speaks inappropriately, and withdraws his limbs to a painful stimulus. What is his GCS score?
A man under alcohol intoxication fell into a manhole and sustained a perineal injury with a swollen scrotum and upper thigh, along with blood at the meatus. The patient is experiencing difficulty passing urine. What is the most likely injury associated with this trauma?
22-year-old woman presents to the emergency department with a chief complaint of severe left upper quadrant [LUQ] pain after being punched by her husband. Her blood pressure is 110/76, her pulse is 80 bpm, and her respiration rate is 24 breaths per minute. The best means to establish a diagnosis is which of the following?
A 25-year-old patient has sustained a head injury. The patient is confused, opens eyes in response to pain, and localizes pain. What is the Glasgow Coma Scale (GCS) score for this patient?
What structures are involved in a degloving injury?
A high-riding prostate is indicative of which injury?
A child presented with blunt abdominal trauma, the first investigation to be done is -
Trauma Indian Medical PG Practice Questions and MCQs
Question 1141: Patient comes with crush injury to upper limb, doctor is concerned about gangrene and sepsis. What scoring system can help decide between amputation and limb salvage?
- A. Glasgow Coma Scale
- B. MESS (Correct Answer)
- C. Gustilo Anderson classification
- D. ASIA guidelines
Explanation: ***MESS*** - The **Mangled Extremity Severity Score (MESS)** is a widely used scoring system to assess the severity of limb injuries and predict the need for **amputation**. - It considers factors like **skeletal/soft tissue injury**, **limb ischemia**, **shock**, and **age** to guide management decisions. *Glasgow Coma Scale* - The **Glasgow Coma Scale (GCS)** is used to assess a patient's level of **consciousness** following a traumatic brain injury or other neurological insults. - It has no relevance in evaluating the severity of a **crush injury** to a limb or guiding decisions between amputation and limb salvage. *Gustilo Anderson classification* - The **Gustilo-Anderson classification** is used to categorize **open fractures** based on the extent of soft tissue damage, wound size, and contamination. - While it helps in assessing the **severity of an open fracture** and guiding initial treatment, it does not provide a comprehensive assessment for limb salvage versus amputation decision-making as MESS does. *ASIA guidelines* - The **ASIA (American Spinal Injury Association) Impairment Scale** is used to classify the severity of **spinal cord injuries**. - It evaluates sensory and motor function to determine the level and completeness of a spinal cord injury, which is unrelated to the assessment of a **crush injury** for limb salvage.
Question 1142: Most common organ affected in underwater blast?
- A. Spleen
- B. Heart
- C. Liver
- D. Intestine (Correct Answer)
Explanation: ***Intestine*** - The **intestine** is the most commonly injured organ in underwater blast injuries due to its large surface area and high gas content. - The gas-filled loops of the bowel are highly susceptible to damage from the rapid pressure changes and shear forces generated by a blast wave in water. *Liver* - The liver is a **solid organ** and is generally more resilient to blast injury compared to gas-filled structures. - While it can be injured, it is not as frequently affected as the intestine in underwater blast scenarios. *Spleen* - Similar to the liver, the spleen is a **solid organ** and less prone to primary blast injury compared to the highly compressible, gas-filled intestine. - Blast injuries to the spleen are usually associated with secondary trauma rather than direct blast wave effects. *Heart* - The heart is relatively protected by the chest wall and is a **solid, muscular organ**, making it less susceptible to direct primary blast injury than air-filled organs. - While blast waves can cause cardiac contusions or arrhythmias, it is not the most commonly affected organ in underwater blast.
Question 1143: Under what circumstances is a countercoup injury most likely to occur?
- A. When the moving head is suddenly decelerated (Correct Answer)
- B. When the stationary head is suddenly accelerated
- C. When a heavy object falls on the head
- D. When the head undergoes rotational acceleration
Explanation: ***When the moving head is suddenly decelerated*** - A **countercoup injury** occurs when the brain impacts the skull on the side *opposite* to the initial point of impact. - This typically happens during **sudden deceleration** of a moving head (e.g., head striking dashboard in motor vehicle accident), causing the brain to continue its forward motion and strike the opposite interior surface of the skull. - Classic example: frontal impact causing occipital lobe contusion. *When the stationary head is suddenly accelerated* - This scenario more commonly leads to a **coup injury**, where the brain impacts the skull at the *point of initial impact*. - The sudden acceleration drives the brain against the skull in the direction of the applied force. *When a heavy object falls on the head* - This scenario is a direct impact injury, primarily causing a **coup injury** at the site of impact. - While significant force can cause widespread brain injury, the primary mechanism is direct blow at the impact site. *When the head undergoes rotational acceleration* - Rotational acceleration primarily causes **diffuse axonal injury (DAI)** due to shearing forces on white matter tracts. - While severe rotational forces can cause contusions, they are not the classic mechanism for countercoup injury.
Question 1144: A patient was brought to the ER following a road traffic accident. On examination, the patient opens his eyes to a painful stimulus, speaks inappropriately, and withdraws his limbs to a painful stimulus. What is his GCS score?
- A. E2V2M3
- B. E3V3M3
- C. E3V2M2
- D. E2V3M4 (Correct Answer)
Explanation: ***E2V3M4*** - Eye opening to **painful stimulus** scores 2 (E2). - Inappropriate speech scores 3 (V3). - Withdrawal from pain scores 4 (M4). *E2V2M3* - This option incorrectly assesses the **verbal response** and **motor response**. - Speaking incomprehensibly scores V2, while here the patient speaks inappropriately (V3). - Flexion to pain scores M3, but the patient exhibits withdrawal from pain (M4). *E3V3M3* - This option incorrectly assesses the **eye opening response**. - Eye opening to verbal command scores E3, but here the patient opens eyes to painful stimulus (E2). - The motor response is also incorrect, as M3 is flexion to pain, not withdrawal from pain (M4). *E3V2M2* - This option incorrectly assesses all three components of the **GCS score**. - A patient who opens eyes to a painful stimulus would score E2, not E3 (eyes opening to verbal command). - Both verbal (V3 for inappropriate speech, not V2 for incomprehensible sounds) and motor responses (M4 for withdrawal from pain, not M2 for extension to pain) are incorrectly scored.
Question 1145: A man under alcohol intoxication fell into a manhole and sustained a perineal injury with a swollen scrotum and upper thigh, along with blood at the meatus. The patient is experiencing difficulty passing urine. What is the most likely injury associated with this trauma?
- A. Bladder rupture
- B. Penile fracture
- C. Bulbar urethral injury (Correct Answer)
- D. Membranous urethral injury
Explanation: ***Bulbar urethra*** - The combination of a **perineal injury** (falling into a manhole), **scrotal and upper thigh swelling**, and **blood at the meatus** strongly indicates a **bulbar urethral injury**. - **Difficulty passing urine** further supports urethral damage, as the bulbar urethra is the most common site of injury from straddle or crush injuries to the perineum. *Bladder rupture* - While bladder rupture can cause difficulty urinating, the primary findings would typically be **suprapubic pain**, a **distended abdomen**, and possibly **hematuria**, not necessarily significant scrotal swelling or blood at the meatus alone. - A bladder rupture is more common with a **direct blow to a full bladder** or a pelvic fracture, rather than a direct perineal impact. *Penile fracture* - **Penile fracture** results from penile trauma during intercourse (or forced bending) and presents with a sudden "snapping" sound, immediate pain, detumescence, and a characteristic "eggplant deformity" due to a ruptured tunica albuginea. - It does not typically involve significant perineal swelling or blood at the meatus in the absence of concomitant urethral injury. *Membranous urethra* - Injuries to the **membranous urethra** are usually associated with **pelvic fractures** and are less commonly linked with direct perineal trauma without evidence of a bony injury. - While blood at the meatus and difficulty urinating can occur, the prominent scrotal and upper thigh swelling from a direct perineal impact points more specifically to the **bulbar urethra**.
Question 1146: 22-year-old woman presents to the emergency department with a chief complaint of severe left upper quadrant [LUQ] pain after being punched by her husband. Her blood pressure is 110/76, her pulse is 80 bpm, and her respiration rate is 24 breaths per minute. The best means to establish a diagnosis is which of the following?
- A. Four-quadrant tap of the abdomen
- B. CT of the abdomen (Correct Answer)
- C. Peritoneal lavage
- D. Upper gastrointestinal [GI] series
Explanation: ***CT of the abdomen*** - A **CT scan of the abdomen** is the diagnostic method of choice for evaluating blunt abdominal trauma in hemodynamically stable patients. - It effectively identifies and characterizes injuries to solid organs like the spleen (located in the LUQ), pancreas, and kidneys, as well as detecting **intraperitoneal fluid** (hemorrhage). *Four-quadrant tap of the abdomen* - A **four-quadrant tap**, or paracentesis, is primarily used to diagnose **ascites** or **spontaneous bacterial peritonitis**. - It is less effective and not the first-line diagnostic for identifying specific organ injuries following blunt trauma, especially when a CT scan is available and the patient is stable. *Peritoneal lavage* - **Diagnostic peritoneal lavage (DPL)** is an invasive procedure primarily used in hemodynamically unstable trauma patients where other imaging modalities are not readily available or definitive. - It is less specific for identifying individual organ damage compared to CT and carries a higher risk of complications. *Upper gastrointestinal [GI] series* - An **upper GI series** uses barium contrast to visualize the esophagus, stomach, and duodenum, primarily for assessing mucosal abnormalities, ulcers, or strictures. - It is not indicated for the evaluation of acute blunt abdominal trauma or suspected solid organ injury.
Question 1147: A 25-year-old patient has sustained a head injury. The patient is confused, opens eyes in response to pain, and localizes pain. What is the Glasgow Coma Scale (GCS) score for this patient?
- A. 6
- B. 11 (Correct Answer)
- C. 12
- D. 7
Explanation: ***11*** - The patient opens eyes in response to pain (E2), is confused (V4), and localizes pain (M5). - Adding these scores together (2 + 4 + 5) gives a total **Glasgow Coma Scale (GCS) score of 11**. *6* - This score would indicate a much more severe neurological compromise, such as no eye opening (E1), incomprehensible sounds (V2), and abnormal flexion (M3). - The patient's presentation of eye opening to pain, confusion, and localizing pain is significantly better than a GCS of 6. *12* - A GCS of 12 would suggest better responses, for example, eye opening to speech (E3) while maintaining confusion (V4) and localizing pain (M5). - The patient's eye opening only in response to pain (E2) makes a score of 12 too high. *7* - A GCS of 7 would signify a more serious injury, such as eye opening to pain (E2), incomprehensible sounds (V2), and abnormal flexion or withdrawal from pain (M3 or M4). - The patient's ability to localize pain (M5) and being confused rather than making incomprehensible sounds (V4) makes a score of 7 too low.
Question 1148: What structures are involved in a degloving injury?
- A. skin, subcutaneous fat, fascia, and muscle
- B. skin and subcutaneous fat
- C. skin only
- D. skin, subcutaneous fat, and sometimes fascia (Correct Answer)
Explanation: ***skin, subcutaneous fat, and sometimes fascia*** - A **degloving injury** involves the complete detachment or tearing away of the top layers of skin and **subcutaneous tissue** (fat) from the underlying structures. - In more severe cases, the injury can extend deeper to include the **fascia** covering muscles, exposing them but usually not directly involving the muscle itself. *skin, subcutaneous fat, fascia, and muscle* - While it includes skin, fat, and fascia, a typical degloving injury generally **does not directly involve the muscle tissue itself**. - If muscle is damaged, it's usually due to a more extensive, crushing type of injury in addition to the degloving, rather than solely the degloving mechanism. *skin and subcutaneous fat* - This option is partially correct as it includes the primary layers involved but **omits the potential involvement of the fascia**, which can be significant in deeper degloving injuries. - A true degloving injury often separates these layers from the underlying fascia, and sometimes the fascia itself is avulsed. *skin only* - This is an **underestimation of the injury's depth**, as degloving inherently involves the entire loss of the skin and the underlying **subcutaneous fat**. - An injury involving only the epidermis or superficial dermis would be classified differently, such as an abrasion or avulsion of superficial skin.
Question 1149: A high-riding prostate is indicative of which injury?
- A. Extraperitoneal Bladder rupture
- B. Intraperitoneal Bladder Rupture
- C. Membranous Urethral Injury (Correct Answer)
- D. Bulbar Urethral Injury
Explanation: ***Membranous Urethral Injury*** - A **high-riding prostate** is a classic sign of **membranous urethral injury**, often resulting from **pelvic fractures**. - The disruption of the **urethra** above the perineal membrane causes the prostate to be displaced superiorly and appear "high." *Extraperitoneal Bladder rupture* - This typically occurs with **pelvic fractures** and involves urine leaking into the **retropubic space**. - While associated with pelvic trauma, it does not directly cause a high-riding prostate; the bladder itself may be ruptured, but the relative position of the prostate is not significantly altered. *Intraperitoneal Bladder Rupture* - This type of rupture usually results from a direct blow to a **full bladder** and involves urine extravasating into the **peritoneal cavity**. - It does not cause a high-riding prostate, as the injury is to the dome of the bladder, not the structures supporting the prostate. *Bulbar Urethral Injury* - A **bulbar urethral injury** usually results from a **straddle injury** and is located in the anterior urethra. - This type of injury does not affect the anatomical position of the prostate, which is posterior and superior to the bulbar urethra.
Question 1150: A child presented with blunt abdominal trauma, the first investigation to be done is -
- A. USG (Correct Answer)
- B. CT Scan
- C. Complete Hemogram
- D. Abdominal X-ray
Explanation: ***USG*** - An **ultrasound (USG)** is the **first-line imaging investigation** for blunt abdominal trauma in children due to its **non-invasive nature**, lack of radiation exposure, and rapid bedside availability. - **FAST (Focused Assessment with Sonography for Trauma)** effectively identifies the presence of **free fluid** (indicating internal bleeding/hemoperitoneum) and can assess solid organ injuries, particularly the **spleen and liver**. - It is the **preferred initial investigation in hemodynamically stable pediatric patients**. *CT Scan* - A **CT scan** is more sensitive and provides detailed anatomical information but involves significant **radiation exposure**, which is a major concern in children. - It is usually reserved for cases where USG is inconclusive, there is a **high clinical suspicion of severe injury**, or when determining the need for surgical intervention in hemodynamically stable patients. *Complete Hemogram* - A **complete hemogram** assesses blood components like hemoglobin and hematocrit, which are crucial for evaluating blood loss, but it is a **laboratory test, not an imaging investigation**. - While important for initial assessment and serial monitoring, it doesn't provide immediate information about the **location, type, or extent of internal abdominal injuries**. *Abdominal X-ray* - An **abdominal X-ray** has limited utility in blunt abdominal trauma as it is primarily useful for detecting **hollow viscus perforation (free air)** or bony fractures. - It does not effectively visualize soft tissue injuries, fluid collections, or solid organ damage, making it unsuitable as the primary diagnostic tool in blunt abdominal trauma.
Practice by Chapter
Initial Assessment of Trauma Patient
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Advanced Trauma Life Support (ATLS) Principles
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Chest Trauma
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Abdominal Trauma
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Head Trauma
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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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Burns Management
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Mass Casualty Management
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Damage Control Surgery
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