Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 711: Which of the following statements about eponymous fractures are true?

A. Monteggia fracture is a fracture of the proximal third of the ulna with radial head dislocation.
B. Galeazzi fracture is a fracture of the distal third of the radius with dislocation of the distal radio-ulnar joint.
C. Colles fracture is a fracture at the cortico-cancellous junction of the distal end of the radius with dorsal tilt.
D. Pott's fracture is a trimalleolar ankle fracture. (Correct Answer)

Explanation: This question tests your knowledge of eponymous fractures of the upper and lower limbs, a high-yield area for NEET-PG. ### **Explanation of the Correct Answer** **Option D** is correct. **Pott’s fracture** is a general term used to describe fractures and dislocations of the ankle joint. Specifically, it refers to a bimalleolar or **trimalleolar fracture** (involving the medial, lateral, and posterior malleoli) caused by outward and backward displacement of the foot. It results in instability of the ankle mortise. ### **Analysis of Incorrect Options** * **Option A (Monteggia Fracture):** While the description is technically correct (Proximal 1/3rd Ulna fracture + Radial head dislocation), it is not the *best* answer here because, in many standardized exams, Pott's fracture is the specific focus for lower limb trauma definitions. However, in a "Multiple Correct" scenario, this would be true. * **Option B (Galeazzi Fracture):** This is a fracture of the distal 1/3rd of the **radius** with dislocation of the **distal radio-ulnar joint (DRUJ)**. It is often called the "Fracture of Necessity" because it almost always requires ORIF in adults. * **Option C (Colles Fracture):** This is a distal radius fracture (cortico-cancellous junction) with **dorsal** displacement and tilt. While the description in the option is correct, the question likely seeks the most specific definition of the lower limb eponym. ### **Clinical Pearls for NEET-PG** * **MUGR Mnemonic:** **M**onteggia = **U**lna (proximal) fracture; **G**aleazzi = **R**adius (distal) fracture. * **Colles vs. Smith:** Colles has a **"Dinner Fork"** deformity (Dorsal tilt); Smith is a reverse Colles with **"Garden Spade"** deformity (Ventral/Volar tilt). * **Nightstick Fracture:** Isolated fracture of the ulnar shaft, usually from a direct blow. * **Cotton’s Fracture:** Another name for a trimalleolar fracture (medial, lateral, and posterior malleolus).

Question 712: What is an absolute contraindication for tooth extraction when related to a fracture line?

A. Tooth related to pericoronitis
B. Tooth interferes with reduction of fracture.
C. Avulsed tooth.
D. None of the above. (Correct Answer)

Explanation: In maxillofacial trauma, the management of a tooth in the fracture line has evolved from routine extraction to a more conservative approach. Modern surgical principles dictate that a tooth should be preserved unless it poses a specific risk to healing or prevents anatomical alignment. **Explanation of the Correct Answer (D):** There is **no absolute contraindication** for tooth extraction in a fracture line. The decision to extract is based on clinical judgment regarding the tooth's viability and its impact on fracture stability. In fact, most teeth in the fracture line are now retained (with antibiotic cover) unless they are severely diseased or physically obstructing the treatment. **Analysis of Incorrect Options:** * **A. Tooth related to pericoronitis:** This is an **indication** for extraction, not a contraindication. Active infection (pericoronitis, apical periodontitis) around a fracture line increases the risk of osteomyelitis and non-union; hence, such teeth are usually removed. * **B. Tooth interferes with reduction:** This is a **strong indication** for extraction. If a tooth or a root fragment is wedged between fracture segments, preventing anatomical reduction, it must be removed to allow proper alignment. * **C. Avulsed tooth:** An avulsed tooth within a fracture line that cannot be replanted or is non-viable is typically removed to prevent it from acting as a foreign body or a source of infection. **NEET-PG High-Yield Pearls:** * **Indications for Extraction in Fracture Line:** Tooth is fractured/non-viable, presence of advanced caries/periodontal disease, tooth prevents reduction, or the tooth is a vertical root fracture. * **Conservative Management:** Intact teeth in the fracture line are usually retained to provide stability (occlusal guide) and are monitored for pulp vitality post-fixation. * **Prophylaxis:** If a tooth is retained in the fracture line, systemic antibiotics are mandatory to prevent infection of the fracture hematoma via the periodontal ligament.

Question 713: What is the common term for Medial epicondylitis?

A. Golfer's elbow (Correct Answer)
B. Tennis elbow
C. Elbow dislocation
D. Ligament sprain

Explanation: **Explanation:** **Medial epicondylitis**, commonly known as **Golfer's elbow**, is an overuse injury characterized by inflammation and micro-tearing at the common flexor origin on the medial epicondyle of the humerus. It primarily involves the **Pronator teres** and **Flexor carpi radialis** muscles. The condition results from repetitive wrist flexion and forearm pronation, common in golfers, pitchers, and manual laborers. **Analysis of Options:** * **Option A (Correct):** Golfer's elbow is the clinical eponym for medial epicondylitis. * **Option B (Incorrect):** **Tennis elbow** refers to **Lateral epicondylitis**, involving the common extensor origin (specifically the *Extensor Carpi Radialis Brevis*). * **Option C (Incorrect):** Elbow dislocation is a traumatic joint disruption, most commonly occurring in a posterior direction. * **Option D (Incorrect):** Ligament sprain refers to a stretch or tear of ligaments (like the Ulnar Collateral Ligament), which is a distinct pathology from the tendinopathy seen in epicondylitis. **Clinical Pearls for NEET-PG:** * **Clinical Test:** Pain is elicited by **resisted wrist flexion** and forearm pronation. * **Nerve Involvement:** The **Ulnar nerve** runs in the cubital tunnel posterior to the medial epicondyle; chronic medial epicondylitis can sometimes lead to ulnar neuropathy. * **Treatment:** Primarily conservative (Rest, NSAIDs, eccentric strengthening). Corticosteroid injections are reserved for refractory cases. * **Mnemonic:** **M**edial = **M**anual/Flexion (**G**olfer); **L**ateral = **L**ift/Extension (**T**ennis).

Question 714: Limb salvage primarily depends on which of the following factors?

A. Vascular injury (Correct Answer)
B. Skin cover
C. Bone injury
D. Nerve injury

Explanation: **Explanation:** The primary determinant of limb salvage in orthopedic trauma is the status of the **vascular supply**. Without adequate arterial perfusion, tissues undergo irreversible ischemia and necrosis within hours (the "golden period"), making salvage impossible regardless of the state of other structures. In the context of the **Mangled Extremity Severity Score (MESS)**—a clinical tool used to decide between salvage and amputation—vascular status is a critical component. If a limb is pulseless or requires vascular repair, the risk of amputation increases significantly. **Analysis of Options:** * **Vascular Injury (Correct):** Ischemia is the most time-sensitive threat. Re-establishing blood flow is the first priority in the surgical hierarchy of limb salvage (often using temporary shunts) because "life of the limb" depends on oxygenation. * **Skin Cover (Incorrect):** While essential for preventing infection and protecting underlying hardware, skin defects can be managed later via plastic surgery (flaps or grafts). It is rarely the primary reason for immediate amputation. * **Bone Injury (Incorrect):** Modern fixation techniques (Ilizarov, intramedullary nailing, or plating) and bone grafting allow for the reconstruction of even severe comminuted fractures or bone loss. * **Nerve Injury (Incorrect):** While a "painless, flail limb" due to sciatic or tibial nerve transection often results in poor functional outcomes, it is not an absolute contraindication to salvage. Nerve repair or tendon transfers can be performed electively. **High-Yield Clinical Pearls for NEET-PG:** * **MESS Score:** A score of **≥ 7** is highly predictive of the need for amputation. * **Warm Ischemia Time:** Muscle tissue can tolerate ischemia for only **6 hours** before irreversible damage occurs. * **Surgical Priority:** In a mangled limb, the sequence is typically: **Shunt (Vascular) → Debridement → Stabilization (Skeletal) → Definitive Vascular Repair → Nerve/Tendon Repair.**

Question 715: In which of the following clinical scenarios is a prosthesis at the head of the femur typically applied?

A. A 40-year-old male with a fracture of the femoral head.
B. A 40-year-old male with a fracture of the femoral neck.
C. A 40-year-old male with a posterior dislocation of the hip.
D. A 65-year-old male with a non-united fracture of the femoral neck. (Correct Answer)

Explanation: ### Explanation The management of femoral neck fractures is primarily determined by two factors: the **age of the patient** and the **viability of the femoral head**. **1. Why Option D is Correct:** In an elderly patient (65 years old) with a non-united fracture of the femoral neck, the blood supply to the femoral head (primarily via the medial circumflex femoral artery) is severely compromised, leading to a high risk of **Avascular Necrosis (AVN)**. In patients over 60, the goal is early mobilization to prevent complications of recumbency (like DVT or pneumonia). Therefore, a **replacement arthroplasty** (Hemiarthroplasty or Total Hip Arthroplasty) is the treatment of choice rather than attempting to fix a non-union in osteoporotic bone. **2. Why Other Options are Incorrect:** * **Option A & B:** In young patients (40 years old), every effort is made to **preserve the natural head** of the femur ("Life is better than metal"). These are treated with urgent anatomical reduction and internal fixation (e.g., Cannulated Cancellous Screws). * **Option C:** Posterior dislocation of the hip is an orthopedic emergency. The primary treatment is **closed reduction** under sedation. Surgery or prosthesis is only considered if there is an associated comminuted acetabular fracture or irreducible dislocation. **Clinical Pearls for NEET-PG:** * **Garden’s Classification:** Used for femoral neck fractures; Stages III and IV (displaced) in the elderly usually require a prosthesis. * **Pauwels' Classification:** Based on the angle of the fracture line; higher angles indicate greater shear forces and higher risk of non-union. * **Treatment Summary:** * Young (<60 yrs): Internal Fixation (Screw fixation). * Elderly (>60 yrs): Hemiarthroplasty (Austin Moore or Thompson prosthesis) or THA. * **Most common complication** of femoral neck fracture is **Avascular Necrosis (AVN)** due to the retrograde blood supply.

Question 716: Which of the following represents Bumper's fracture?

A. Comminuted fracture of vertebral body
B. Comminuted intra-articular fracture of distal tibial end
C. Comminuted, depressed fracture of the lateral tibial condyle (Correct Answer)
D. Avulsion fracture of the base of 5th metatarsal

Explanation: ### Explanation **Bumper’s fracture** refers to a fracture of the **lateral tibial condyle**. It is classically caused by a direct blow to the lateral aspect of the knee, most commonly when a car bumper strikes a pedestrian (hence the name). #### 1. Why Option C is Correct The mechanism involves a strong **valgus stress** combined with axial loading. The hard lateral femoral condyle is driven into the softer articular surface of the lateral tibial plateau, resulting in a **comminuted and depressed fracture**. This injury often involves damage to the lateral meniscus and the medial collateral ligament (MCL). #### 2. Analysis of Incorrect Options * **Option A (Comminuted fracture of vertebral body):** This describes a **Burst fracture**, typically caused by high-energy axial loading (e.g., falling from a height and landing on feet). * **Option B (Comminuted intra-articular fracture of distal tibial end):** This is a **Pilon (or Plafond) fracture**, usually caused by a vertical compression force driving the talus into the distal tibia. * **Option C (Avulsion fracture of the base of 5th metatarsal):** This is known as a **Jones fracture** (if in Zone 2) or a **Pseudo-Jones/Dancer’s fracture** (if a true avulsion of the styloid process by the peroneus brevis tendon). #### 3. High-Yield Clinical Pearls for NEET-PG * **Classification:** Tibial plateau fractures (including Bumper's) are classified using the **Schatzker Classification**. * **Nerve Injury:** Always check for **Common Peroneal Nerve** injury, as it winds around the neck of the fibula near the site of impact. * **Associated Injury:** Look for the "Unhappy Triad" if the force is severe (MCL, Medial Meniscus, and ACL tears). * **Treatment Goal:** Restoration of articular congruity and knee stability to prevent early-onset secondary osteoarthritis.

Question 717: What are the clinical manifestations of Klumpke's paralysis?

A. Water-tip deformity
B. Intrinsic hand muscle weakness (Correct Answer)
C. Elbow extended and wrist extended
D. Only elbow is extended

Explanation: **Explanation:** Klumpke’s paralysis is a lower brachial plexus injury involving the **C8 and T1** nerve roots. It typically occurs due to hyperabduction of the arm (e.g., a person falling from a height and clutching a tree branch or during a breech delivery). 1. **Why the correct answer is right:** The T1 nerve root provides the primary motor supply to the **intrinsic muscles of the hand** (interossei, thenar, and hypothenar muscles) via the ulnar and median nerves. Damage to these roots leads to profound weakness and atrophy of these muscles, resulting in a characteristic **"Claw Hand"** deformity (hyperextension at the MCP joints and flexion at the IP joints) due to the unopposed action of long extensors and flexors. 2. **Why the incorrect options are wrong:** * **Option A & C:** "Waiter’s tip" deformity (arm adducted, internally rotated, elbow extended, and wrist flexed) is the hallmark of **Erb’s Palsy**, which involves the upper brachial plexus (**C5-C6**). * **Option D:** Isolated elbow extension is not a specific clinical sign for either palsy; in Erb’s, the elbow is extended due to paralysis of the Biceps (C5-C6), but it is accompanied by other postural changes. **High-Yield Clinical Pearls for NEET-PG:** * **Horner’s Syndrome:** Often associated with Klumpke’s paralysis if the T1 root is avulsed proximal to the sympathetic chain (miosis, ptosis, and anhidrosis). * **Sensory Loss:** Occurs along the ulnar aspect of the forearm and hand (medial border). * **Erb’s vs. Klumpke’s:** Erb’s is much more common and involves the "Police officer's tip" position, whereas Klumpke’s is rarer and focuses on distal hand disability.

Question 718: The mechanism of injury of a transverse fracture of the medial malleolus most commonly results from which of the following forces?

A. Abduction force
B. Adduction force
C. External rotation force
D. Direct force (Correct Answer)

Explanation: **Explanation:** In ankle fractures, the orientation of the fracture line on the malleolus is a direct indicator of the mechanism of injury, based on the **Lauge-Hansen classification**. 1. **Why "Direct Force" is correct:** A **transverse fracture** of the medial malleolus typically occurs due to a **direct blow** to the bone or, more commonly in a clinical context, as an **avulsion injury**. When an abduction or external rotation force is applied, the deltoid ligament pulls on the medial malleolus, "snapping" it transversely. However, among the provided options, a pure transverse fracture line (without associated fibular involvement) is classically associated with direct trauma or avulsion. 2. **Why other options are incorrect:** * **Adduction Force (B):** This produces a **vertical or oblique fracture** of the medial malleolus. As the talus shifts medially, it "pushes" against the medial malleolus, causing a vertical shear fracture. * **Abduction (A) and External Rotation (C) Forces:** These forces typically result in a **transverse avulsion fracture** of the medial malleolus *associated* with a high or spiral fracture of the fibula (e.g., Pott’s fracture). If the question implies an isolated transverse fracture without syndesmotic injury, direct force is the most straightforward mechanism. **Clinical Pearls for NEET-PG:** * **Vertical Fracture of Medial Malleolus:** Think **Adduction** (Sander-Lauge: Supination-Adduction). * **Transverse Fracture of Medial Malleolus:** Think **Avulsion** (Abduction/External Rotation) or **Direct Force**. * **Pott’s Fracture:** Bimalleolar fracture caused by abduction-external rotation. * **Cotton’s Fracture:** Trimalleolar fracture (Medial, Lateral, and Posterior malleolus). * **Maisonneuve Fracture:** Proximal fibular fracture associated with a medial malleolar avulsion or deltoid ligament tear; always palpate the proximal fibula in ankle injuries.

Question 719: Following nerve injury, at what rate does the injured nerve regenerate?

A. 0.001 cm/day
B. 0.1 cm/day (Correct Answer)
C. 1 cm/day
D. 0.0001 cm/day

Explanation: **Explanation:** The correct answer is **0.1 cm/day (Option B)**. Following a peripheral nerve injury (specifically Seddon’s Axonotmesis or Sunderland’s Grade II-IV), the distal segment undergoes **Wallerian degeneration**. Once the debris is cleared, the proximal axon begins to sprout and regenerate along the preserved endoneurial tubes. In clinical practice, the standard accepted rate of axonal regeneration is approximately **1 mm per day**. Converting this to centimeters: * 1 mm = 0.1 cm * Therefore, the rate is **0.1 cm/day**. **Analysis of Incorrect Options:** * **Option A (0.001 cm/day):** This equals 0.01 mm/day, which is far too slow to be clinically significant. * **Option C (1 cm/day):** This equals 10 mm/day. This is an overestimation; while regeneration can occasionally reach 2-3 mm/day in proximal segments, 10 mm/day is physiologically impossible for human nerves. * **Option D (0.0001 cm/day):** This is an infinitesimal rate (0.001 mm/day) and does not represent biological growth. **High-Yield Clinical Pearls for NEET-PG:** 1. **Tinel’s Sign:** This is used to track regeneration. A positive Tinel’s sign (tingling on percussion) at a site distal to the injury indicates the presence of regenerating axonal sprouts. 2. **Order of Recovery:** Nerve recovery typically follows a specific sequence: **Sympathetic function → Pain → Temperature → Touch → Proprioception → Motor function.** 3. **Hoffmann-Tinel Sign:** If the distal point of tingling advances by roughly 1 mm/day, it indicates successful progression of regeneration. 4. **Factors:** Regeneration is faster in children and in proximal injuries compared to distal ones.

Question 720: A 50-year-old female presents with pain in the left hip and inability to walk following a fall. On examination, there is tenderness in the Scaepa's triangle. What is the most likely diagnosis?

A. Intracapsular neck of femur fracture (Correct Answer)
B. Intertrochanteric fracture femur
C. Transervical fracture neck of femur
D. Ischial tuberosity fracture

Explanation: **Explanation:** The clinical presentation of a hip injury in an elderly female following a fall, combined with specific tenderness in **Scarpa’s triangle** (Femoral triangle), is a classic sign of an **Intracapsular Neck of Femur Fracture**. **1. Why Intracapsular Neck of Femur Fracture is correct:** The neck of the femur lies deep to the Scarpa’s triangle. In intracapsular fractures, the fracture hematoma causes tension within the joint capsule, leading to localized tenderness over the anterior hip joint (Scarpa’s triangle). Additionally, these patients typically present with an inability to walk and a limb that is externally rotated and shortened. **2. Why the other options are incorrect:** * **Intertrochanteric fracture femur:** These are extracapsular fractures. The maximum tenderness is usually located over the **Greater Trochanter** rather than the Scarpa’s triangle. Ecchymosis is also more common here due to the rich blood supply outside the capsule. * **Transcervical fracture neck of femur:** While this is a type of intracapsular fracture, "Intracapsular neck of femur fracture" (Option A) is the broader, more definitive clinical diagnosis encompassing subcapital and transcervical types. In NEET-PG, if a general category and a specific subtype are both present, the broader clinical entity is often preferred unless specific radiographic details are provided. * **Ischial tuberosity fracture:** This usually occurs due to forceful contraction of hamstrings (avulsion) in young athletes. Tenderness would be localized to the buttock/posterior thigh, not the anterior Scarpa’s triangle. **Clinical Pearls for NEET-PG:** * **Vascularity:** The main blood supply to the femoral head is the **Medial Circumflex Femoral Artery**. Intracapsular fractures risk disrupting this, leading to **Avascular Necrosis (AVN)**. * **Position of Limb:** In neck of femur fractures, the limb is in **moderate** external rotation (due to capsule attachment), whereas in intertrochanteric fractures, it is in **marked** (90°) external rotation. * **Shenton’s Line:** Disruption of this arc on X-ray is a key diagnostic feature for neck of femur fractures.

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Open Fractures

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Fractures in Children

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Fracture Complications

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Nonunion and Malunion

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Trauma — MCQs

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