Polytrauma Management — MCQs
Which of the following is not a component of damage control surgery?
Road traffic accident (RTA) with multiple fractures - initial treatment would be:
A patient is in shock with gross comminuted fracture. The first step in management is to give
What is to be addressed first in case of polytrauma -
Radial Nerve injury of this type recovers with conservative management
What is the appropriate technique for examining the back of a polytrauma patient with suspected spinal injury?
Which of the following diagnostic studies is NOT useful in the evaluation of upper-extremity pain?
What is the best treatment for an old fracture?
A 40-year-old man presents with a fracture of the shaft of the femur following a road traffic accident. Three days after trauma, he becomes tachypnoeic and develops conjunctival petechiae. What is the most likely diagnosis?
In acute knee injuries with swelling and hemarthrosis with muscle spasm, which of the following tests is most sensitive to detect anterior cruciate ligament injury?
Polytrauma Management Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following is not a component of damage control surgery?
- A. Control of contamination
- B. Control of hemorrhage
- C. Definitive repair (Correct Answer)
- D. Temporary closure
Explanation: ***Definitive repair*** - **Damage control surgery** is a staged approach for severely injured patients, prioritizing stabilization over complete repair. - **Definitive repair** is the goal of the final stage, after the patient's physiological status has improved, not an initial component. *Control of contamination* - This is a crucial early step in damage control surgery to prevent **sepsis** and further physiological deterioration. - It involves measures like **bowel repair** or diversion, and thorough abdominal lavage. *Control of hemorrhage* - This is the **primary immediate goal** of damage control surgery, often achieved through packing or temporary shunts. - Uncontrolled bleeding leads to the **lethal triad** of coagulopathy, hypothermia, and acidosis. *Temporary closure* - After addressing immediate life-threatening issues, the abdomen or other body cavity is temporarily closed to prevent **abdominal compartment syndrome**. - This allows time for patient resuscitation and correction of physiological derangements before definitive repair.
Question 2: Road traffic accident (RTA) with multiple fractures - initial treatment would be:
- A. Management of shock
- B. Splinting of limbs
- C. Airway management (Correct Answer)
- D. Cervical spine protection
Explanation: ***Airway management*** - In trauma, **establishing and maintaining a patent airway** is the absolute priority, as compromised breathing can lead to rapid deterioration and death. - The **ABCs (Airway, Breathing, Circulation)** of trauma care dictate that airway intervention precedes other life-saving measures. *Management of shock* - While crucial, **managing shock (C)** follows **airway (A)** and **breathing (B)** in the primary survey of trauma care. - Addressing profound shock without a patent airway can be ineffective and leads to irreversible damage. *Splinting of limbs* - **Splinting fractures** is important for pain control, preventing further injury, and minimizing blood loss in open fractures, but it is not an immediate life-saving intervention. - This falls under the **secondary survey** or definitive management, after life-threatening issues have been addressed. *Cervical spine protection* - **Cervical spine protection** is essential in trauma to prevent further neurological injury and is performed simultaneously with airway management (often with in-line stabilization). - However, a patent airway is the **most immediate life-sustaining intervention** if the airway is compromised.
Question 3: A patient is in shock with gross comminuted fracture. The first step in management is to give
- A. Blood transfusion
- B. Ringer's Lactate solution intravenously (Correct Answer)
- C. Plasma expanders
- D. Normal saline intravenously
Explanation: ***Ringer's Lactate solution intravenously*** - In cases of **hypovolemic shock**, the immediate priority is to restore circulating volume with an **isotonic crystalloid solution** like **Ringer's Lactate**. - This helps to stabilize hemodynamics and perfuse vital organs, while other measures are prepared. *Blood transfusion* - While blood loss is a concern in gross comminuted fractures, **blood transfusions** are generally reserved for more severe, confirmed blood loss and are often given after initial crystalloid resuscitation. - Type-specific or cross-matched blood may take time to prepare and administer. *Plasma expanders* - **Plasma expanders** (e.g., colloids) are alternatives but are generally not the first-line choice over crystalloids for initial resuscitation in trauma, due to their higher cost and potential side effects, with no clear survival benefit. - They also do not address the acute need for volume replacement as effectively as initial rapid infusion of crystalloids. *Normal saline intravenously* - **Normal saline** is an isotonic crystalloid and could be used; however, **Ringer's Lactate** is often preferred in large volumes for trauma and shock patients because its balanced electrolyte composition closer to plasma may help to prevent **hyperchloremic acidosis**. - While not as detrimental as in very large volumes, normal saline can contribute to metabolic acidosis when given in excessive amounts.
Question 4: What is to be addressed first in case of polytrauma -
- A. Circulation
- B. Neurology
- C. Blood Pressure
- D. Airway (Correct Answer)
Explanation: ***Airway*** - Maintaining a **patent airway** is the absolute first priority in polytrauma management according to the **ATLS (Advanced Trauma Life Support)** protocol. - Failure to secure an airway can lead to **hypoxia** and **brain damage** within minutes, regardless of other injuries. *Circulation* - While critical, addressing **circulation** (C in ABCDE) comes after establishing a secure airway and adequate breathing (A and B). - Uncontrolled hemorrhage would be the focus of circulation management, but only after guaranteeing proper oxygenation. *Neurology* - Neurological assessment (D in ABCDE for Disability) follows the primary survey of airway, breathing, and circulation. - Initial neurological evaluation focuses on **level of consciousness** using the **GCS (Glasgow Coma Scale)**. *Blood Pressure* - **Blood pressure** is an indicator of circulatory status but is not the first thing to be addressed. - It falls under the "C" for circulation in the ATLS protocol, which is secondary to airway and breathing.
Question 5: Radial Nerve injury of this type recovers with conservative management
- A. Crush injury
- B. Chemical injury
- C. Neurotmesis
- D. Neuropraxia (Correct Answer)
Explanation: ***Neuropraxia*** - **Neuropraxia** is a mild form of nerve injury involving demyelination without axonal disruption, allowing for complete recovery with conservative management. - The nerve's electrical conduction is temporarily blocked, but the **axon** and its supporting structures remain intact. *Crush injury* - Crush injuries often result in more severe nerve damage, ranging from **axonotmesis** to **neurotmesis**, generally requiring more than conservative management for recovery. - The extensive compression and potential tissue damage can lead to significant axonal disruption and scar tissue formation, impeding nerve regeneration. *Chemical injury* - Chemical injuries can cause varying degrees of nerve damage, often resulting in **axonopathy** or demyelination, which may or may not recover with conservative management. - The extent of damage is highly dependent on the type and concentration of the chemical, and the duration of exposure. *Neurotmesis* - **Neurotmesis** involves complete transection of the nerve, including the axon and surrounding connective tissue sheaths, making spontaneous recovery highly unlikely. - Surgical intervention, such as **nerve repair** or grafting, is typically required for any functional recovery.
Question 6: What is the appropriate technique for examining the back of a polytrauma patient with suspected spinal injury?
- A. Barrel roll
- B. Chin lift
- C. Log roll (Correct Answer)
- D. None of the above
Explanation: ***Log roll*** - A **log roll** is the appropriate technique for examining the back of a polytrauma patient with suspected spinal injury because it helps to maintain **spinal alignment** and prevent further damage. - This maneuver requires at least **three to four healthcare providers** to safely turn the patient as a unit while maintaining neutral spinal alignment. *Barrel roll* - The term "barrel roll" is not a recognized medical technique for safely moving a patient with a suspected spinal injury; it typically refers to an **aerobatic maneuver**. - Using this term in a medical context could lead to confusion or an **unsafe patient handling technique**. *Chin lift* - A **chin lift** is a maneuver used to open the airway in an unconscious patient, but it is **contraindicated when cervical spinal injury is suspected** as it causes neck extension. - In patients with suspected spinal injury, the **jaw thrust maneuver** is preferred for airway management, and neither technique is appropriate for examining the back or assessing spinal integrity. *None of the above* - **Log roll** is indeed an appropriate and recognized technique for examining the back of a polytrauma patient with suspected spinal injury. - Therefore, stating "None of the above" would be incorrect as there is a valid and correct option provided.
Question 7: Which of the following diagnostic studies is NOT useful in the evaluation of upper-extremity pain?
- A. Cervical spine x-ray
- B. Chest X-ray
- C. Neural conduction studies of the median nerve
- D. Adson's test (Correct Answer)
Explanation: **Explanation:** The correct answer is **Adson’s test**. While it is a classic physical examination maneuver used to assess for Thoracic Outlet Syndrome (TOS), it is **not a diagnostic study** (imaging or electrodiagnostic test). Furthermore, in modern clinical practice, Adson’s test is considered unreliable due to a high rate of false positives (up to 25% in healthy individuals), making it "not useful" as a definitive diagnostic tool compared to objective studies. **Analysis of Options:** * **Cervical spine X-ray:** Essential to rule out cervical spondylosis or a herniated disc, which frequently cause referred pain to the upper extremity (cervical radiculopathy). * **Chest X-ray:** Crucial for identifying a **cervical rib** or a **Pancoast tumor** (at the lung apex), both of which can compress the brachial plexus and cause radiating arm pain. * **Neural conduction studies (NCS):** These are objective electrodiagnostic tests used to confirm focal neuropathies, such as Carpal Tunnel Syndrome (median nerve compression), a common cause of upper limb pain. **Clinical Pearls for NEET-PG:** * **Adson’s Test:** Performed by extending the patient's neck and rotating the head toward the affected side while taking a deep breath. A positive result is the disappearance of the radial pulse. * **Thoracic Outlet Syndrome (TOS):** Most commonly caused by a cervical rib (C7) or tight scalene muscles. * **High-Yield Fact:** For upper extremity pain radiating from the neck, the **Spurling test** (foraminal compression) is more specific for cervical radiculopathy than Adson’s is for TOS.
Question 8: What is the best treatment for an old fracture?
- A. Manipulation and POP cast application.
- B. Open reduction and internal fixation and bone grafting. (Correct Answer)
- C. K Wire fixation
- D. External fixation
Explanation: **Explanation:** In orthopaedics, an **"old fracture"** (also known as a neglected fracture) refers to a fracture that has remained untreated for more than 3 weeks. By this stage, the fracture ends are rounded off, the medullary canal may be sclerosed, and the intervening gap is filled with dense fibrous tissue or exuberant callus. **Why Option B is correct:** Treatment of an old fracture requires a three-pronged approach: 1. **Open Reduction:** Since the fracture is no longer fresh, manual manipulation is impossible due to soft tissue contractures and fibrous union. The site must be surgically opened to clear the fibrous tissue. 2. **Internal Fixation:** Rigid stability (usually with plates or nails) is necessary to allow for primary or secondary bone healing. 3. **Bone Grafting:** This is the **most critical step**. In old fractures, the biological healing potential is diminished. Bone grafting provides osteoconductive, osteoinductive, and osteogenic properties to "jump-start" the healing process and bridge any gaps created during the freshening of bone ends. **Why other options are incorrect:** * **Option A:** Manipulation is only effective for fresh fractures (<1-2 weeks). In old fractures, the soft tissue has contracted, and the fracture is "sticky," making closed reduction impossible and dangerous. * **Option C:** K-wires do not provide enough rigid stability to overcome the mechanical challenges of an old fracture and do not address the biological need for grafting. * **Option D:** External fixation is primarily used for open fractures with severe soft tissue injury or infected non-unions; it is not the standard primary treatment for a simple old fracture. **Clinical Pearls for NEET-PG:** * **Definition:** A fracture is generally termed "old" after 3 weeks. * **The "Freshening" Concept:** During surgery for old fractures, the bone ends must be "freshened" until punctate bleeding (the **Papineau sign**) is seen to ensure a good blood supply for the graft. * **Gold Standard Graft:** Autologous Iliac Crest Bone Graft (ICBG) remains the gold standard for treating neglected fractures and non-unions.
Question 9: A 40-year-old man presents with a fracture of the shaft of the femur following a road traffic accident. Three days after trauma, he becomes tachypnoeic and develops conjunctival petechiae. What is the most likely diagnosis?
- A. Pulmonary embolism
- B. Sepsis syndrome
- C. Fat embolism (Correct Answer)
- D. Hemothorax
Explanation: ### Explanation The clinical presentation of a **long bone fracture** (femur shaft) followed by a **symptom-free interval of 24–72 hours**, and the subsequent development of the classic triad of **respiratory distress (tachypnea), cerebral dysfunction, and petechial rashes**, is pathognomonic for **Fat Embolism Syndrome (FES)**. #### Why Fat Embolism is Correct: FES occurs when fat globules from the bone marrow enter the systemic circulation following a fracture. These globules cause mechanical obstruction and trigger a biochemical inflammatory response (Free Fatty Acid toxicity). The **conjunctival petechiae** are a hallmark sign, occurring in only 20-50% of cases but highly specific to FES. #### Why Other Options are Incorrect: * **Pulmonary Embolism (PE):** While it causes tachypnea, PE typically occurs later (usually 1–2 weeks post-surgery/trauma) due to DVT. It does not present with petechial rashes. * **Sepsis Syndrome:** While sepsis causes tachypnea, it is usually accompanied by high-grade fever, hypotension, and a clear source of infection. Three days is too early for post-traumatic osteomyelitis to cause systemic sepsis. * **Hemothorax:** This would present immediately after trauma with decreased breath sounds and dullness on percussion, not after a 3-day delay. #### High-Yield Clinical Pearls for NEET-PG: * **Gurd’s Criteria:** Used for diagnosis. Major criteria include axillary/conjunctival petechiae, respiratory insufficiency, and cerebral involvement. * **Snowstorm Appearance:** Classic finding on Chest X-ray (diffuse bilateral pulmonary infiltrates). * **Earliest Sign:** Tachycardia is often the earliest clinical sign. * **Management:** Primarily **supportive** (Oxygenation/Ventilation). Early stabilization of the fracture (Internal fixation) is the best preventive measure. * **Schonfeld’s Criteria:** Another scoring system used for FES diagnosis.
Question 10: In acute knee injuries with swelling and hemarthrosis with muscle spasm, which of the following tests is most sensitive to detect anterior cruciate ligament injury?
- A. Lachman's test (Correct Answer)
- B. Pivot shift test
- C. Apley's grinding test
- D. Anterior drawer test
Explanation: **Explanation:** The **Lachman’s test** is the most sensitive clinical test for diagnosing an acute Anterior Cruciate Ligament (ACL) injury. In the acute phase, knee injuries are often accompanied by significant swelling (hemarthrosis) and protective muscle spasms (hamstring guarding). * **Why Lachman’s is the correct answer:** The test is performed at **20–30° of flexion**. At this angle, the bony geometry of the femoral condyles does not stabilize the tibia, and the hamstrings are relatively relaxed, minimizing the effect of muscle spasms. This allows for the detection of even subtle anterior translation and the assessment of the "endpoint" (firm vs. soft). * **Why other options are incorrect:** * **Anterior Drawer Test:** Performed at 90° of flexion. In acute injuries, the hamstrings go into spasm at this angle, preventing anterior translation and leading to high false-negative rates. Additionally, the posterior horn of the medial meniscus can "wedge" against the femoral condyle, blocking movement. * **Pivot Shift Test:** While it is the most **specific** test for ACL insufficiency (indicating rotatory instability), it is very difficult to perform in an acute setting because it is painful and requires complete muscle relaxation. It is often only reliable under anesthesia. * **Apley’s Grinding Test:** This test is used to evaluate **meniscal injuries**, not ligamentous laxity. **Clinical Pearls for NEET-PG:** * **Most Sensitive Test (Overall & Acute):** Lachman’s Test. * **Most Specific Test:** Pivot Shift Test. * **Gold Standard Investigation:** MRI Knee. * **Segond Fracture:** An avulsion fracture of the lateral tibial condyle; it is pathognomonic for an ACL tear.
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