Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 1151: Which of the following is the correct management of abdominal compartment syndrome?

A. Antihypertensives
B. Urgent Fasciotomy
C. Wait and monitor for 24 hours
D. Urgent decompressive laparotomy (Correct Answer)

Explanation: ***Urgent decompressive laparotomy*** - The definitive treatment for abdominal compartment syndrome (ACS) is **urgent surgical decompression** via **decompressive laparotomy**. - This involves opening the abdominal fascia to immediately **reduce intra-abdominal pressure (IAP)**, typically indicated when IAP >20 mmHg with new organ dysfunction. - Decompression is crucial to prevent irreversible organ damage, restore perfusion to compressed organs, and improve ventilation. - The abdomen is often left open temporarily with negative pressure wound therapy until the patient stabilizes. *Antihypertensives* - Antihypertensives may manage systemic hypertension but do not address the **elevated intra-abdominal pressure** that is the primary pathology in ACS. - This approach is insufficient and could worsen **organ perfusion** by reducing the perfusion pressure gradient (MAP - IAP) to already compressed abdominal organs. - ACS requires mechanical decompression, not pharmacological blood pressure management. *Urgent Fasciotomy* - Fasciotomy is the correct treatment for **extremity compartment syndrome** (e.g., leg, forearm), where it relieves pressure within muscle compartments. - It is anatomically inappropriate for **abdominal compartment syndrome**, which requires opening the abdominal cavity, not limb fascial compartments. - This represents a fundamental misunderstanding of the anatomical site requiring decompression. *Wait and monitor for 24 hours* - ACS is a **surgical emergency** that can rapidly progress to multiorgan failure, acute kidney injury, respiratory failure, and cardiovascular collapse. - Delaying intervention by 24 hours would likely result in **irreversible organ damage** and significantly increased mortality. - Once diagnosed (IAP >20 mmHg with organ dysfunction), urgent decompression is mandatory.

Question 1152: Which of the following characteristics is most accurate about Boerhaave syndrome?

A. Most cases follow a bout of heavy eating or drinking
B. Perforation of the esophagus due to barotrauma (Correct Answer)
C. Sudden severe chest pain is an early manifestation
D. Most common site is left posterolateral aspect 3 - 5 cms above the gastroesophageal junction

Explanation: ***Perforation of the esophagus due to barotrauma*** - **Boerhaave syndrome** is a spontaneous esophageal rupture caused by a sudden increase in **intraesophageal pressure** against a closed glottis, leading to barotrauma. - This typically occurs during forceful **vomiting** or **retching**, expelling gastric contents through the weakened esophageal wall. *Sudden severe chest pain is an early manifestation* - While **sudden, severe chest pain** is a hallmark symptom, it is a manifestation of the syndrome rather than its defining characteristic or cause. - The chest pain is a direct result of the esophageal tear and the leakage of gastric contents into the mediastinum, causing irritation and inflammation. *Most cases follow a bout of heavy eating or drinking* - **Heavy eating or drinking** (especially alcohol) can precipitate vomiting, which is the direct cause of the rupture, but it is not the syndrome's most accurate characteristic. - The actual mechanism is the severe increase in transesophageal pressure during forceful emesis, not simply the consumption itself. *Most common site is left posteromedial aspect 3 - 5 cms above the gastroesophageal junction* - This statement accurately pinpoints the **most common anatomical location** of the esophageal tear in Boerhaave syndrome due to the inherent weakness at this site. - However, it describes the **localization** of the injury rather than the fundamental characteristic of the syndrome, which is the perforation itself due to barotrauma.

Question 1153: Which of the following is an indication for thoracotomy in the case of hemothorax?

A. Persistent drainage of 250 ml/hr (Correct Answer)
B. Total output of 1000 ml of blood
C. Clotted hemothorax with incomplete drainage
D. Shift of mediastinum to the opposite side due to tension pneumothorax

Explanation: ***Persistent drainage of 250 ml/hr*** - A persistent **high drainage rate** (>200-250 mL/hr for 2-4 hours) indicates ongoing significant hemorrhage requiring surgical exploration via **thoracotomy**. - This criterion is crucial for preventing hemodynamic instability and persistent blood loss that cannot be controlled by a chest tube alone. - This is a **quantifiable, objective indication** for emergency thoracotomy. *Total output of 1000 ml of blood* - While 1000 mL of blood from a chest tube is significant, a **total initial output of >1500 mL** is the standard threshold for immediate thoracotomy. - A total output of 1000 mL without persistent high flow rates may often be managed conservatively with chest tube drainage alone. *Clotted hemothorax with incomplete drainage* - **Clotted or retained hemothorax** is typically managed with **video-assisted thoracoscopic surgery (VATS)** or intrapleural fibrinolytics, not emergency thoracotomy. - This is a delayed complication requiring evacuation of organized blood, but not the urgent bleeding control that emergency thoracotomy addresses. - Emergency thoracotomy is indicated for **active ongoing bleeding**, not retained clot. *Shift of mediastinum to the opposite side due to tension pneumothorax* - A **tension pneumothorax** causes mediastinal shift and is a life-threatening emergency requiring **immediate needle decompression and chest tube insertion**, not thoracotomy. - This describes air accumulation under tension, not the persistent bleeding that indicates thoracotomy for hemothorax. - While both are traumatic conditions, the management is fundamentally different.

Question 1154: A 40-year-old male presented with a penetrating trauma to the chest. He is dyspnoeic with distended neck veins, hypotension, and mediastinum shifted to the opposite side. What is the most appropriate management?

A. Insertion of a large bore needle in the 2nd ICS in the midclavicular line (Correct Answer)
B. Fluid resuscitation
C. Starting inotropic support
D. Endotracheal intubation

Explanation: ***Insertion of a large bore needle in the 2nd ICS in the midclavicular line*** - The constellation of **dyspnea**, **distended neck veins**, **hypotension**, and **tracheal deviation** after penetrating chest trauma is highly indicative of **tension pneumothorax**. - **Needle decompression** at the 2nd intercostal space (ICS) in the midclavicular line is the immediate life-saving intervention to relieve the trapped air and restore hemodynamic stability. *Fluid resuscitation* - While fluid resuscitation is important in trauma management, it is not the primary intervention for a **tension pneumothorax**. - Without relieving the tension, fluids alone will not address the **mechanical compression** of the heart and great vessels. *Starting inotropic support* - **Inotropic support** helps improve cardiac contractility but does not resolve the underlying cause of hemodynamic instability in tension pneumothorax, which is mechanical compression. - This intervention would be ineffective without first addressing the **tension pneumothorax**. *Endotracheal intubation* - **Endotracheal intubation** is a means of airway management and ventilation, but it does not directly decompress a tension pneumothorax. - In some cases, **positive pressure ventilation** during intubation can worsen a tension pneumothorax by increasing intrathoracic pressure if the air leak has not been relieved.

Question 1155: A 40-year-old male with chest trauma presents with breathlessness, decreased respiratory sounds on the right side, hyperresonance on percussion, and distended neck veins. What is the most likely diagnosis?

A. Tension Pneumothorax (Correct Answer)
B. Flail Chest
C. Myocardial Infarction
D. Cardiac Tamponade

Explanation: ***Tension Pneumothorax*** - The classic triad of **breathlessness**, **decreased breath sounds** on the affected side, and **hyperresonance** on percussion following chest trauma is highly indicative of a tension pneumothorax. - **Distended neck veins** (jugular venous distension) occur due to increased intrathoracic pressure impeding venous return to the heart. *Cardiac Tamponade* - Characterized by **Beck's triad**: hypotension, muffled heart sounds, and jugular venous distension. - While **distended neck veins** are present, the absence of muffled heart sounds, the presence of decreased breath sounds, and hyperresonance point away from tamponade. *Flail Chest* - Defined by at least two contiguous ribs fractured in at least two places, leading to a **paradoxical movement** of the chest wall during respiration. - The key diagnostic feature of flail chest (paradoxical chest wall movement) is not described, nor are the breath sounds or percussion findings consistent with this diagnosis. *Myocardial Infarction* - Typically presents with **sudden chest pain**, often radiating to the left arm or jaw, and may cause breathlessness. - It does not cause **decreased breath sounds**, **hyperresonance**, or directly lead to these specific localized chest findings after trauma.

Question 1156: Amount of blood loss in Stage I of hemorrhagic shock is -

A. <10%
B. <30%
C. <15% (Correct Answer)
D. <40%

Explanation: ***<15%*** - Stage I (Class I) hemorrhagic shock is characterized by **minimal blood loss of up to 15%** of total blood volume (up to 750 mL in a 70 kg adult). - This is the **universally accepted ATLS definition** for Class I hemorrhage. - At this level, compensatory mechanisms maintain normal vital signs with minimal clinical manifestations. - Patients typically show minimal or no symptoms, with possible mild tachycardia only. *<10%* - While this amount falls within Stage I, it represents only a **portion of the Stage I range** and is not the complete definition. - Stage I actually extends up to 15%, making this option incomplete. *<30%* - This range encompasses **both Stage I (up to 15%) and Stage II (15-30%)** hemorrhagic shock. - Stage II manifests with tachycardia (>100 bpm), tachypnea, and decreased pulse pressure, but blood pressure remains normal. - This is too broad to specifically define Stage I. *<40%* - This range covers **Stage I, II, and III** hemorrhagic shock. - Stage III (30-40% loss) presents with significant hypotension, marked tachycardia (>120 bpm), altered mental status, and decreased urine output. - This is far beyond the compensated Stage I definition.

Question 1157: Which type of fracture is most likely to cause exsanguinating blood loss?

A. Closed tibial fracture
B. Open femoral fracture (Correct Answer)
C. Open humeral fracture
D. Closed humeral fracture

Explanation: ***Open femoral fracture*** - An **open femoral fracture** involves both a break in the **femur** (the largest bone in the body, which houses significant marrow and has an extensive blood supply) and a break in the skin, allowing for direct external bleeding. - The **femur** can bleed up to **1-2 liters internally** even in a closed fracture, and an **open fracture** compounds this risk with direct external blood loss, leading to rapid exsanguination. *Closed tibial fracture* - A **closed tibial fracture** does not involve a break in the skin, so external bleeding is not a primary concern. - While there can be internal bleeding, the **tibia** is smaller than the femur and generally causes less significant blood loss (typically **250-500 mL**) compared to a femoral fracture. *Open humeral fracture* - An **open humeral fracture** involves exposure of the bone to the outside, but the **humerus** is a smaller bone with less marrow volume and blood supply compared to the femur. - While bleeding can be significant, especially if major vessels like the **brachial artery** are damaged, the overall potential for rapid, life-threatening **exsanguination** is less than with a femoral fracture. *Closed humeral fracture* - A **closed humeral fracture** does not involve a break in the skin, limiting blood loss to internal bleeding within the arm. - The **humerus** is a relatively smaller bone and, in a closed fracture, the surrounding tissues can tamponade some of the bleeding, making exsanguinating hemorrhage unlikely.

Question 1158: Best prognostic factor for head injury is:

A. Glasgow coma scale (Correct Answer)
B. Age
C. Mode of injury
D. CT

Explanation: ***Glasgow coma scale*** - The **Glasgow Coma Scale (GCS)** is a standardized tool used to assess the level of consciousness in head injury patients, providing an objective measure of neurological function. - A **lower GCS score** correlates with a greater severity of injury and poorer prognosis, making it the most reliable predictor of outcome. *Age* - While age can influence recovery, with **older patients generally having worse outcomes** due to less neural plasticity and pre-existing comorbidities, it is not the single best prognostic factor. - Younger patients often have better recovery potential, but their prognosis is still heavily dependent on the immediate severity of the brain injury. *Mode of injury* - The mode of injury (e.g., blunt trauma, penetrating injury) provides information about the mechanism and potential **types of injury**, but does not directly quantify the severity of brain damage or predict long-term outcomes as precisely as GCS. - While **high-impact injuries** tend to be more severe, the actual neurological deficit measured by GCS is a better indicator of prognosis. *CT* - **CT scans** are crucial for identifying specific neurological injuries like hemorrhage, edema, or fractures, which can guide immediate management. - However, the findings on a CT scan do not solely determine prognosis; a patient with a relatively normal CT can still have a poor outcome if their **GCS is low**, indicating widespread neuronal dysfunction not always visible on imaging.

Question 1159: In which of the following conditions is neurosurgery not indicated?

A. Subdural hematoma (SDH)
B. Epidural hematoma (EDH)
C. Diffuse axonal injury (DAI) (Correct Answer)
D. Intracerebral hemorrhage

Explanation: ***Diffuse axonal injury (DAI)*** - Neurosurgery is generally **not indicated** for diffuse axonal injury because the primary damage involves widespread shearing of axons throughout the white matter, rather than a focal, surgically accessible lesion. - Management of DAI is primarily **supportive**, focusing on managing intracranial pressure and optimizing cerebral perfusion, as there is no specific surgical intervention to reverse the axonal damage. *Subdural hematoma (SDH)* - Surgical intervention, such as a **craniotomy** or **burr hole drainage**, is often indicated for acute or subacute subdural hematomas, especially when they are large, causing mass effect, or leading to neurological deterioration. - The goal of surgery is to **evacuate the blood clot** and relieve pressure on the brain. *Epidural hematoma (EDH)* - **Epidural hematomas** are typically surgical emergencies that require urgent craniotomy for evacuation of the hematoma to relieve pressure on the brain. - This is due to their rapid development and tendency to cause significant **mass effect** and brain herniation. *Intracerebral hemorrhage* - Neurosurgery may be indicated for certain types of **intracerebral hemorrhage (ICH)**, particularly those that are superficial, large, causing significant mass effect, or located in a surgically accessible area. - The decision for surgery often depends on the **size and location of the bleed**, the patient's neurological status, and the risk of further deterioration.

Question 1160: What is the most common cause of facial nerve palsy?

A. Cholesteatoma
B. Acoustic neuroma
C. Bell's palsy (Correct Answer)
D. Trauma

Explanation: ***Bell's palsy*** - **Bell's palsy** is an **idiopathic** and acute peripheral facial nerve palsy, accounting for the majority of facial nerve paralysis cases. - It is a **diagnosis of exclusion** and is characterized by unilateral facial weakness or paralysis that develops over hours to days. *Cholesteatoma* - A **cholesteatoma** is an abnormal, noncancerous growth in the middle ear behind the eardrum, which can erode bone and lead to **facial nerve compression** in late stages. - While it can cause facial nerve palsy, it is a much less common cause compared to Bell's palsy. *Acoustic neuroma* - An **acoustic neuroma** (vestibular schwannoma) is a benign, slow-growing tumor that develops on the **vestibulocochlear nerve (cranial nerve VIII)**. - Facial nerve palsy can occur if the tumor grows large enough to compress the adjacent **facial nerve (cranial nerve VII)**, but this is a secondary and less common manifestation. *Trauma* - **Trauma** (e.g., temporal bone fracture, deep facial lacerations) can directly injure the facial nerve, leading to palsy. - While a significant cause, the overall incidence of traumatic facial nerve palsy is lower than that of Bell's palsy.

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