Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 1081: Which type of skull fracture is most commonly associated with motor vehicle accidents?

A. Linear fracture (Correct Answer)
B. Depressed fracture
C. Basilar fracture
D. Comminuted fracture

Explanation: ***Correct Answer: Linear fracture*** - **Linear fractures** are the most common type of skull fracture, often resulting from a **low-energy impact** over a wide surface area, such as hitting the head on a dashboard or steering wheel during an MVA. - They are characterized by a **single crack** in the skull without displacement or fragmentation of the bone. - Account for approximately **70-80% of all skull fractures**. *Incorrect: Depressed fracture* - **Depressed fractures** occur when a high-energy impact drives a piece of the skull bone inwards, often caused by a **direct, focal blow** rather than the diffuse impact common in MVAs. - This type of fracture carries a higher risk of **dural tears** and **brain injury** due to compression. *Incorrect: Basilar fracture* - **Basilar fractures** involve the base of the skull and are typically associated with **high-impact trauma**, but they are not the *most common* type overall in MVAs. - They are clinically identified by signs such as **raccoon eyes** (periorbital ecchymosis), **Battle's sign** (mastoid ecchymosis), and **CSF rhinorrhea or otorrhea**. *Incorrect: Comminuted fracture* - A **comminuted fracture** involves the skull bone breaking into **multiple fragments** at the site of injury, typically due to significant high-energy trauma. - While MVAs can cause comminuted fractures, they are less common than linear fractures, which often result from the more frequent **blunt force** associated with such accidents.

Question 1082: In a patient with extensive burns covering 30% of the body surface area, which fluid resuscitation formula is most commonly used?

A. Parkland formula (Correct Answer)
B. Brooke formula
C. Galveston formula
D. Evans formula

Explanation: ***Parkland formula*** - The **Parkland formula** is the most widely accepted and commonly used method for calculating fluid resuscitation in adult burn patients. - It uses **4 mL of Lactated Ringer's solution per kg of body weight per percent total body surface area (%TBSA)** burned, with half given in the first 8 hours and the remaining half over the next 16 hours. *Brooke formula* - The Brooke formula is also designed for burn resuscitation but uses **2 mL/kg/%TBSA** of Lactated Ringer's solution for adults, which is less than the Parkland formula. - While historically used, it has largely been replaced in common practice by the Parkland formula due to concerns about potentially inadequate fluid volumes. *Galveston formula* - The Galveston formula is specifically tailored for **pediatric burn patients**, particularly those undergoing excision and grafting, and focuses on maintenance fluid with added colloid and blood. - It is not typically used for initial fluid resuscitation in adults with extensive burns. *Evans formula* - The Evans formula is an older protocol that used **1 mL/kg/%TBSA of colloid** and **1 mL/kg/%TBSA of crystalloid** plus 2000 mL D5W for adults. - It delivered a significant amount of colloid earlier, which is not the preferred approach in initial burn resuscitation compared to the higher crystalloid volume of the Parkland formula.

Question 1083: A 30-year-old patient is brought to the emergency room with a severe burn injury. The physician documents the burn using the rule of nines. Which of the following statements is true regarding this method?

A. It is used to assess the depth of the burn
B. It estimates the total body surface area affected (Correct Answer)
C. It helps to determine the cause of the burn
D. It is only used for adult patients

Explanation: ***It estimates the total body surface area affected*** - The **rule of nines** is a standardized method to quickly estimate the **percentage of total body surface area (TBSA)** affected by burns in adults. - This estimation is crucial for guiding fluid resuscitation and determining the severity of the burn injury. *It is used to assess the depth of the burn* - The rule of nines assesses the **extent of the burn** (TBSA), not its depth. [1] - Burn depth is determined by clinical examination, considering factors like skin appearance, sensation, and capillary refill. [1] *It helps to determine the cause of the burn* - The rule of nines is a quantitative tool for burn size assessment and does not provide information about the **etiology of the burn**. - The cause of a burn is determined through patient history and physical examination. *It is only used for adult patients* - While the traditional rule of nines is for adults, modified versions like the **Lund-Browder chart** are used for children to account for their different body proportions. - Children have proportionally larger heads and smaller lower extremities compared to adults, necessitating specialized charts for accurate TBSA estimation.

Question 1084: During a disaster, a patient presents with an open fracture of the femur and significant hemorrhage. What is the priority in triage?

A. Control hemorrhage (Correct Answer)
B. Immobilize the fracture
C. Administer antibiotics
D. Start IV fluids

Explanation: ***Control hemorrhage*** - In a trauma setting, **life-threatening hemorrhage** is the immediate priority as it can quickly lead to shock and death. - The acronym **ABC (Airway, Breathing, Circulation)** underpins this, with circulation (and thus hemorrhage control) being critical after ensuring a patent airway and adequate breathing. *Immobilize the fracture* - While important for pain control and preventing further soft tissue damage, **fracture immobilization** is secondary to controlling active, life-threatening bleeding. - An open fracture in itself is not as immediately life-threatening as uncontrolled hemorrhage. *Administer antibiotics* - Administering **antibiotics** is crucial for preventing infection in open fractures but is a delayed intervention compared to addressing immediate life threats. - Infection prevention comes after stabilizing the patient's immediate physiological conditions. *Start IV fluids* - Initiating intravenous fluids helps in **resuscitating a patient in shock** due to blood loss but is a supportive measure that should accompany, or follow immediately after, active hemorrhage control. - Stopping the bleeding source is more critical than simply replacing lost volume, especially in a disaster scenario with limited resources.

Question 1085: A patient with head trauma presents with clear fluid leaking from the nose. Which condition should be suspected?

A. Ethmoid sinusitis
B. Basilar skull fracture (Correct Answer)
C. Allergic rhinitis
D. Maxillary sinus fracture

Explanation: ***Basilar skull fracture*** - **Clear fluid leaking from the nose** after head trauma is highly suspicious for **cerebrospinal fluid (CSF) rhinorrhea**, indicating a breach in the skull base, characteristic of a basilar skull fracture. - This leakage occurs when the dura mater and arachnoid layers are torn, allowing CSF to escape from the subarachnoid space into the nasal cavity. *Ethmoid sinusitis* - Ethmoid sinusitis typically presents with **purulent nasal discharge**, facial pain, and pressure, not clear CSF leakage. - It is an inflammatory condition of the sinuses and does not involve a breach of the skull base. *Allergic rhinitis* - Allergic rhinitis causes **clear, watery nasal discharge (rhinorrhea)**, but it is accompanied by other allergic symptoms like sneezing, nasal itching, and congestion, and it is not associated with head trauma or CSF leakage. - This condition is an allergic response, not a structural injury. *Maxillary sinus fracture* - While a maxillary sinus fracture is a type of facial trauma, it primarily causes swelling, pain, and sometimes epistaxis (nosebleed), but not typically clear CSF leakage. - A fracture in this area would generally lead to blood or mucus drainage, rather than CSF.

Question 1086: A 30-year-old man is brought to the emergency department after a head injury. He has a Glasgow Coma Scale (GCS) score of 8. Which of the following best describes his level of consciousness?

A. Mild head injury
B. Moderate head injury
C. Severe head injury (Correct Answer)
D. Fully conscious

Explanation: ***Severe head injury*** - A **Glasgow Coma Scale (GCS) score of 3-8** defines a **severe head injury**. - This typically indicates a significant compromise in **neurological function** requiring immediate and aggressive medical intervention, including **airway protection and ICU care**. *Mild head injury* - A **mild head injury** is generally associated with a **GCS score of 13-15**. - Patients with mild head injuries may experience brief loss of consciousness or altered mental status but are typically able to follow commands. *Moderate head injury* - A **moderate head injury** is characterized by a **GCS score of 9-12**. - Patients in this category often have a more prolonged period of confusion or loss of consciousness compared to mild injuries, but are still responsive. *Fully conscious* - **Fully conscious** individuals have a **GCS score of 15**, indicating they are alert, oriented, and able to respond appropriately. - A GCS of 8 clearly indicates a significant impairment in consciousness, ruling out full consciousness.

Question 1087: What is the immediate effect of high-voltage electrical injury?

A. Coagulation necrosis
B. Entry and exit wounds
C. Internal organ damage
D. Burns at the point of contact (Correct Answer)

Explanation: **Correct Answer: Burns at the point of contact** - The immediate effect of high-voltage electrical injury is the rapid generation of heat at the points where the current enters and exits the body, leading to **thermal burns** - These **contact burns** are often severe due to the intense energy deposition and can involve skin, subcutaneous tissue, and deeper structures - This is the most direct and immediate observable macroscopic effect *Incorrect: Coagulation necrosis* - While **coagulation necrosis** is a significant pathological finding in electrical injuries, it represents a **cellular response** that occurs *after* the initial thermal damage, rather than the immediate macroscopic effect - It results from cellular protein denaturation and enzyme inhibition due to heat and electrical current, leading to tissue death *Incorrect: Entry and exit wounds* - **Entry and exit wounds** are physical manifestations describing the *locations* where the electrical current entered and left the body - While these wounds include burns, they describe the anatomical sites rather than the immediate effect itself - Their appearance is highly variable depending on voltage and contact duration *Incorrect: Internal organ damage* - **Internal organ damage** is a serious consequence of high-voltage electrical injury, primarily due to the current passing through the body - This includes cardiac arrhythmias, respiratory arrest, and muscular contractions - However, this damage occurs *as a result* of the electricity's passage through tissues, not as the immediate direct effect at the point of contact

Question 1088: A 35-year-old female with 30% total body surface area burns is hypotensive and tachycardic. Analyze the resuscitation plan using the Parkland formula.

A. 4 ml/kg/%TBSA, all in the first 8 hours
B. 2 ml/kg/%TBSA, all in the first 8 hours
C. 4 ml/kg/%TBSA, one third in the first 8 hours
D. 4 ml/kg/%TBSA, half in the first 8 hours (Correct Answer)

Explanation: ***4 ml/kg/%TBSA, half in the first 8 hours*** - The **Parkland formula** is 4 mL of crystalloid per kg of body weight per percentage of total body surface area (TBSA) burned. - Of the total calculated fluid, **half is administered in the first 8 hours** from the time of injury, and the remaining half over the next 16 hours. *4 ml/kg/%TBSA, all in the first 8 hours* - Administering the entire calculated fluid volume within the first 8 hours would lead to **excessive fluid administration** and potential complications like compartment syndrome or pulmonary edema. - While 4 ml/kg/%TBSA is the correct total volume per day, it should be distributed over 24 hours (half in the first 8 hours, half in the next 16 hours). *2 ml/kg/%TBSA, all in the first 8 hours* - This formula implies a **total daily fluid volume of 2 mL/kg/%TBSA**, which is typically used for pediatric patients or electrical burns, not general adult thermal burns. - Administering all of this reduced volume in the first 8 hours would still be an incorrect distribution and likely lead to **under-resuscitation** for severe burns. *4 ml/kg/%TBSA, one third in the first 8 hours* - While 4 ml/kg/%TBSA is the correct daily fluid calculation, administering only **one-third** in the first 8 hours would likely result in **inadequate resuscitation** during the critical initial phase. - The standard dictates delivering a larger proportion, typically half, within the crucial first 8 hours of post-burn injury.

Question 1089: What is the most appropriate initial management for a patient with a knife wound to the abdomen who is experiencing hemodynamic instability?

A. Perform a bedside ultrasound to assess for internal bleeding.
B. Immediate surgical intervention to control bleeding and repair injuries. (Correct Answer)
C. Obtain detailed imaging of the abdomen to identify injuries.
D. Monitor the patient closely without immediate intervention.

Explanation: ***Immediate surgical intervention to control bleeding and repair injuries.*** - **Hemodynamic instability** in a trauma patient, especially with a penetrating abdominal wound, indicates significant internal bleeding requiring immediate surgical exploration (**laparotomy**). - Delaying definitive control of hemorrhage for diagnostic tests can worsen patient outcomes by progressing to **irreversible shock** and multiple organ failure. *Perform a bedside ultrasound to assess for internal bleeding.* - While a **FAST exam (Focused Assessment with Sonography for Trauma)** can rapidly detect fluid in the abdomen (indicating bleeding), it is performed concurrent with resuscitation and does not delay immediate transport to the operating room for an unstable patient. - For a hemodynamically unstable patient with a penetrating abdominal wound, a **positive FAST** reinforces the need for immediate surgery but a negative FAST does not rule out injuries requiring surgery. *Obtain detailed imaging of the abdomen to identify injuries.* - Detailed imaging like **CT scans** is contraindicated in hemodynamically unstable patients because it delays critical resuscitation and surgical intervention. - Moving an unstable patient to the CT scanner can lead to further decompensation without providing timely management of life-threatening bleeding. *Monitor the patient closely without immediate intervention.* - This approach is extremely dangerous and inappropriate for a patient with a penetrating abdominal wound and **hemodynamic instability**. - Without immediate intervention, ongoing hemorrhage will lead to **exsanguination** and death.

Question 1090: In a trauma patient with a pelvic fracture and hemodynamic instability, what is the priority intervention?

A. Pelvic binder application (Correct Answer)
B. Immediate external fixation surgery
C. CT scan of the pelvis
D. Administration of IV fluids only

Explanation: ***Pelvic binder application*** - A pelvic binder stabilizes the **pelvis**, compresses potential bleeding sites, and reduces the pelvic volume, thereby helping to control **hemorrhage** in hemodynamically unstable patients with pelvic fractures. - It is a rapid, non-invasive intervention that can be applied in the pre-hospital or emergency department setting as an initial measure to improve stability and facilitate resuscitation. *Immediate external fixation surgery* - While definitive management for unstable pelvic fractures often involves **surgical fixation**, it is not the *priority* initial intervention for a hemodynamically unstable patient. - Surgery requires operating room setup, anesthesia, and time, which may delay critical hemorrhage control when immediate action is needed. *CT scan of the pelvis* - A **CT scan** provides detailed anatomical information about the fracture and associated injuries, but it should not delay life-saving interventions for a hemodynamically unstable patient. - Moving an unstable patient to the CT scanner can worsen their condition and delay critical resuscitation efforts. *Administration of IV fluids only* - While **intravenous fluids** are crucial for resuscitation in hemorrhagic shock, they do not address the source of bleeding from an unstable pelvic fracture. - Without stabilizing the fracture and controlling the hemorrhage, fluid administration alone may lead to **dilutional coagulopathy** and continued blood loss.

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