Trauma Practice Questions

Q: The cause of systemic secondary insult to injured brain include all of the following except :

Therapeutic hypothermia. Therapeutic hypothermia - This is a treatment strategy used to mitigate secondary brain injury by reducing metabolic demand and inflammation, thus it is not a cause of secondary insult. [1] - Therapeutic hypothermia aims to improve neurological outcomes after initial brain injury. [1] Hypercapnia - Elevated arterial CO2 causes cerebral vasodilation, leading to increased cerebral blood volume and intracranial pressure (ICP). [2] - Increased ICP can compromise cerebral perfusion pressure and exacerbate secondary brain injury in an already vulnerable brain. Hypoxemia - Reduced oxygen delivery to the brain can lead to further neuronal damage and cell death, especially in an injured brain with compromised metabolic needs. [1], [2] - This directly contributes to ischemic injury and worsens the neurological outcome. Hypotension - Low blood pressure reduces cerebral perfusion pressure (CPP), directly decreasing blood flow to the brain. - This can cause or worsen cerebral ischemia, leading to further secondary brain injury and poorer patient outcomes.

Q: All of the following are types of traumatic brain injury EXCEPT:

None of the above.. ***None of the above.*** - **All listed terms** - contusion, concussion, and laceration - are valid types of traumatic brain injury (TBI). - Since the question asks for the exception and all three specific options are correct types of TBI, **"None of the above"** is the correct answer. *Contusion.* - A **brain contusion** is a bruise on the brain tissue caused by direct impact to the head. - It involves localized bleeding and swelling within the brain parenchyma, visible on CT as areas of hyperdensity. *Concussion.* - A **concussion** is a mild traumatic brain injury resulting from rapid acceleration-deceleration forces. - It causes temporary disruption of brain function without necessarily showing structural damage on imaging. *Laceration.* - A **brain laceration** is a tearing of brain tissue, representing a severe form of TBI. - This typically occurs with penetrating head injuries or depressed skull fractures with bone fragments.

Q: A patient died after a blunt trauma to the chest. The most common respiratory cause of death in blunt chest trauma is:

Pneumothorax. ***Pneumothorax*** - A **pneumothorax** occurs when air leaks into the space between the lung and chest wall, leading to lung collapse and impaired ventilation. - In blunt chest trauma, a **tension pneumothorax** can rapidly develop, causing severe respiratory distress and circulatory compromise which can be fatal. *Pulmonary laceration* - **Pulmonary lacerations** are tears in the lung tissue that can lead to air leaks (pneumothorax) or bleeding (hemothorax). - While they can be serious, the immediate life-threatening complication is often the resultant **pneumothorax** or **hemothorax**, rather than the laceration itself. *Tracheo bronchial rupture* - **Tracheobronchial ruptures** are severe injuries that involve a tear in the trachea or a bronchus. - While life-threatening due to **massive air leak** or **airway obstruction**, they are relatively rare compared to pneumothorax after blunt chest trauma. *Massive hemorrhage* - **Massive hemorrhage** (e.g., hemothorax) can certainly cause death in blunt chest trauma due to hypovolemic shock. - However, respiratory compromise from a **pneumothorax** is often the primary and most rapid cause of death in cases where the lung itself is the major source of morbidity.

Q: What is the investigation of choice in a patient with blunt abdominal trauma with hematuria?

CECT. ***Correct Answer: CECT*** - **Contrast-enhanced computed tomography (CECT)** is the investigation of choice for evaluating blunt abdominal trauma with hematuria as it accurately assesses the extent of injury to the **kidneys, ureters, bladder**, and surrounding structures. - It provides detailed images for detecting **renal lacerations, hematomas, urine extravasation**, and other abdominal organ injuries. - **Gold standard** in trauma protocols for comprehensive evaluation of renal and abdominal injuries. *Incorrect: USG of the abdomen* - **Ultrasound** can identify gross abnormalities like large hematomas or free fluid but is less sensitive than CECT for subtle renal injuries or collecting system disruptions. - It is often used as an initial screening tool (FAST exam) but not the definitive investigation of choice in this context. *Incorrect: Retrograde urogram* - A **retrograde urogram** primarily evaluates the **lower urinary tract** (ureters and bladder) by injecting contrast directly into the urethra. - It is not suitable for assessing the extent of renal parenchymal injury or other abdominal organ damage in blunt trauma. *Incorrect: IVP* - **Intravenous pyelogram (IVP)** uses intravenous contrast to visualize the kidneys, ureters, and bladder, but it has largely been replaced by CECT due to its lower sensitivity and specificity for traumatic injuries. - It provides less detailed anatomical information about surrounding soft tissues and can miss subtle parenchymal or vascular injuries.

Q: Sitaram a 40-year old man, met with an accident and comes to emergency department with engorged neck veins, pallor, rapid pulse and chest pain Diagnosis is -

Cardiac tamponade (fluid accumulation in the pericardium). ***Cardiac tamponade (fluid accumulation in the pericardium)*** - **Engorged neck veins (elevated JVP)**, **pallor** (due to decreased cardiac output), and a **rapid pulse** ("pulsus paradoxus" or tachycardia from compensatory mechanisms) in the context of trauma are classic signs of **cardiac tamponade**. - **Chest pain** can result from the acute compression of the heart, leading to reduced ventricular filling and cardiac output. *Pulmonary laceration (lung injury)* - A pulmonary laceration would primarily present with **respiratory distress**, **hemoptysis**, and potential **air leak syndromes** (e.g., pneumothorax), not typically engorged neck veins as a primary sign. - While it can cause chest pain and rapid pulse, it doesn't explain the combination of engorged neck veins and significant cardiovascular compromise seen here without other prominent respiratory symptoms. *Splenic rupture (abdominal trauma)* - Splenic rupture typically presents with **left upper quadrant abdominal pain**, **abdominal tenderness**, and signs of **hypovolemic shock** (pallor, rapid pulse, hypotension), but not generally engorged neck veins. - The primary location of trauma and symptoms would be abdominal, not chest pain and engorged neck veins. *Hemothorax (blood in the pleural cavity)* - A hemothorax would cause **chest pain**, **dyspnea**, **diminished breath sounds** on the affected side, and signs of **hypovolemic shock** if severe (pallor, rapid pulse). - However, it typically leads to **collapsed neck veins** due to hypovolemia, rather than engorged neck veins, unless there's a co-existing tension pneumothorax or cardiac tamponade.

Q: Most common location of Subdural hematoma is

Frontoparietal. ***Frontoparietal*** - The **frontal** and **parietal lobes** are the largest cortical surfaces and are most commonly injured due to the typical vector of head trauma causing movement of the brain within the skull. - Bridging veins traversing the **subdural space** between the brain surface and the dura mater are most susceptible to tearing in this region, leading to hematoma formation. *Temporoparietal* - While bridging veins exist in this region, the **temporoparietal area** is less frequently the primary or sole site of large subdural hematomas compared to the more extensive frontoparietal region. - Trauma mechanisms are less likely to exclusively impact this area to produce the most common subdural bleeds. *Parieto-occipital* - The **parieto-occipital region** is generally less prone to subdural hematoma formation because this area is relatively more protected in typical head injury mechanisms. - The bridging veins in this area are less subject to the extensive shearing forces that tend to affect the frontal and parietal regions. *Frontotemporal* - The **frontotemporal region** is involved, but the frontoparietal area is considered the most common overall location due to the broader surface area and vulnerability of bridging veins. - Trauma to the temples more commonly presents with **epidural hematomas** if associated with middle meningeal artery injury, although subdural hematomas can also occur.

Q: In thermal burn injury, which of the following is true about the zonal classification?

Inner layer is zone of coagulation. ***Correct: Inner layer is zone of coagulation*** - The **zone of coagulation** is the innermost area of a burn wound with **maximum thermal damage** - Characterized by **irreversible necrosis** with protein denaturation and cell death - Forms a dry, leathery **eschar** that is non-viable tissue - This zone has direct contact with the heat source and suffers the most severe injury *Incorrect: Innermost layer is zone of hyperemia* - The **zone of hyperemia** is the **outermost layer**, not the innermost - This zone has minimal thermal damage with reversible injury - Characterized by **vasodilation and increased blood flow** due to inflammatory response - Tissue in this zone typically recovers completely with proper care *Incorrect: Outermost layer is zone of stasis* - The **zone of stasis** is the **middle layer**, not the outermost - This zone has **decreased perfusion** due to microvascular thrombosis and vasoconstriction - It is **potentially salvageable** with adequate resuscitation and wound care - Without proper treatment, this zone may progress to necrosis *Incorrect: Middle layer is zone of hyperemia* - The **zone of hyperemia** is the **outermost layer**, not the middle layer - The middle layer is the **zone of stasis** with compromised but potentially reversible tissue viability - Understanding this three-zone model (Jackson's classification) is crucial for burn management and assessing tissue viability

Q: In a blast injury, which of the following organs is most vulnerable?

Lungs. ***Lungs*** - The **lungs** are the most vulnerable organ to life-threatening primary blast injury due to their air-filled structure, which makes them highly susceptible to barotrauma from the blast wave. - Blast waves cause rapid pressure changes leading to pulmonary contusion, hemorrhage, pneumothorax, air embolism, and blast lung syndrome—the most lethal primary blast injury. - Clinically, pulmonary blast injury carries the highest morbidity and mortality among primary blast injuries. *GI tract* - The **gastrointestinal tract**, particularly air-filled segments (colon, small bowel), can be affected by blast injuries causing perforations, hemorrhage, or contusions. - However, GI injuries are less common and generally less immediately life-threatening compared to pulmonary blast injuries. *Ear drum* - The **tympanic membrane (eardrum)** is the most sensitive structure to pressure changes and ruptures at the lowest pressure threshold (5 psi), often being the first injury in a blast. - While eardrum rupture serves as an important marker of blast exposure, it is rarely life-threatening and causes primarily hearing loss rather than systemic injury. *Liver* - The **liver** is a solid organ and is relatively resistant to primary blast wave effects compared to air-filled structures. - Hepatic injuries from blasts typically result from secondary mechanisms (projectiles, fragments) or tertiary injuries (blunt trauma from displacement) rather than the primary blast wave itself.

Q: A 30 year old female comes with acute breathlessness, neck vein distension and absent breath sounds and mediastinal shift. Which of the following should be done immediately?

Large bore needle puncture of pleura. ***Large bore needle puncture of pleura*** - This clinical scenario describes a **tension pneumothorax**, characterized by **acute breathlessness**, **neck vein distension** (due to impaired venous return), **absent breath sounds** on one side, and **mediastinal shift** (tracheal deviation away from the affected side). - **Needle decompression** (large bore needle puncture of the pleura) is an urgent, life-saving procedure to relieve the trapped air and restore hemodynamic stability, as waiting for imaging could be fatal. *CXR* - While a **chest X-ray (CXR)** would confirm the diagnosis of pneumothorax, it is not an immediate life-saving intervention. - Delaying treatment for a CXR in a suspected tension pneumothorax can lead to **cardiovascular collapse** and death. *ABG analysis* - **Arterial blood gas (ABG) analysis** provides information on oxygenation and ventilation status. - However, in a rapidly deteriorating patient with suspected tension pneumothorax, it is not the primary immediate intervention. *HRCT* - **High-resolution computed tomography (HRCT)** is an imaging modality that provides detailed images of the lungs. - It not only takes time but is not indicated in a life-threatening emergency like a tension pneumothorax where immediate intervention is required.

Question 1

The cause of systemic secondary insult to injured brain include all of the following except :

Accepted Answer

Therapeutic hypothermia

Answer

Hypercapnia

Answer

Hypoxaemia

Answer

Hypotension

Question 2

Following road traffic accident, a patient with vague abdominal pain was immediately taken to the operation theatre for emergency laparotomy. On examination, a large, contained, stable, non-pulsatile retroperitoneal hematoma was found on the right side. One-shot IVU shows a barely discernible nephrogram on the right side and prompt uptake and excretion on the left side. What should be the next step to be done?

Accepted Answer

Isolate the proximal renal vessels, open the Gerota's fascia and explore the kidney

Answer

Nephrectomy

Answer

Perform on table retrograde pyelography

Answer

Perform on table angiography

Question 3

All of the following are types of traumatic brain injury EXCEPT:

Accepted Answer

None of the above.

Answer

Contusion.

Answer

Concussion.

Answer

Laceration.

Question 4

A patient died after a blunt trauma to the chest. The most common respiratory cause of death in blunt chest trauma is:

Accepted Answer

Pneumothorax

Answer

Pulmonary laceration

Answer

Tracheo bronchial rupture

Answer

Massive hemorrhage

Question 5

What is the investigation of choice in a patient with blunt abdominal trauma with hematuria?

Accepted Answer

CECT

Answer

USG of the abdomen

Answer

Retrograde urogram

Answer

IVP

Question 6

Sitaram a 40-year old man, met with an accident and comes to emergency department with engorged neck veins, pallor, rapid pulse and chest pain Diagnosis is -

Accepted Answer

Cardiac tamponade (fluid accumulation in the pericardium)

Answer

Pulmonary laceration (lung injury)

Answer

Splenic rupture (abdominal trauma)

Answer

Hemothorax (blood in the pleural cavity)

Question 7

Most common location of Subdural hematoma is

Accepted Answer

Frontoparietal

Answer

Temporoparietal

Answer

Parieto-occipital

Answer

Frontotemporal

Question 8

In thermal burn injury, which of the following is true about the zonal classification?

Accepted Answer

Inner layer is zone of coagulation

Answer

Innermost layer is zone of hyperemia

Answer

Outermost layer is zone of stasis

Answer

Middle layer is zone of hyperemia

Question 9

In a blast injury, which of the following organs is most vulnerable?

Accepted Answer

Lungs

Answer

GI tract

Answer

Ear drum

Answer

Liver

Question 10

A 30 year old female comes with acute breathlessness, neck vein distension and absent breath sounds and mediastinal shift. Which of the following should be done immediately?

Accepted Answer

Large bore needle puncture of pleura

Answer

CXR

Answer

ABG analysis

Answer

HRCT

Trauma — MCQs

Trauma — MCQs

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