Trauma Practice Questions

Q: Dunlop traction is a type of traction used in the management of?

Fracture of the humerus. ***Fracture of the humerus*** - **Dunlop traction** is specifically designed for the management of **supracondylar fractures** of the humerus in children. - It involves traction applied to the arm, often in conjunction with skin or skeletal traction to maintain reduction and alignment. *Fracture of the radius* - Fractures of the radius, particularly distal radius fractures, are typically managed with **closed reduction and casting** or **surgical fixation**, not Dunlop traction. - Traction methods for forearm fractures are less common and usually involve specialized techniques for specific fracture patterns. *Fracture of the femur* - Femur fractures, especially in children, are commonly managed with **Bryant's traction** or **femoral skeletal traction** in younger children, or surgical intervention. - Dunlop traction is not suitable due to the significant muscle mass and bone size of the femur requiring stronger, more robust traction. *Fracture of the tibia* - Tibia fractures are generally managed with **casting**, **external fixation**, or **intramedullary nailing**. - While traction can be used initially for severely displaced or open tibial fractures, it typically involves **skeletal traction** rather than Dunlop traction.

Q: Palpable femur head on per rectal exam is a feature of which of the following conditions?

Posterior hip dislocation. ***Posterior hip dislocation*** - In **posterior hip dislocation**, the femoral head is displaced posteriorly, often coming to rest on the **ischium**. - This posterior displacement can make the **femoral head palpable** through the rectum, particularly in thin individuals. *Anterior hip dislocation* - Involves the femoral head displacing **anteriorly**, usually into the **obturator foramen** or onto the **pubis**. - The femoral head would be palpable in the **groin region**, not rectally. *Central hip dislocation* - Occurs when the femoral head is driven **centrally** through the **acetabulum** into the pelvis. - While it involves intrapelvic displacement, the femoral head is typically covered by pelvic bone and not directly palpable per rectally. *Inferior hip dislocation* - This is a rare form of dislocation where the femoral head is forced **inferiorly** from the acetabulum. - The femoral head would typically be palpable in the **perineal region**, not through the rectum.

Q: What condition is associated with the absence of femoral artery pulsation in the affected limb?

Posterior dislocation of the hip. ***Posterior dislocation of the hip*** - A **posterior hip dislocation** can compress or injure the **femoral artery** due to the displacement of the femoral head posteriorly, leading to a diminished or absent pulse. - This is a **medical emergency** as vascular compromise can lead to **ischemia and necrosis** of the affected limb. *Fracture of the neck of femur* - While a **femoral neck fracture** can cause significant pain and may sometimes be associated with a compromised blood supply to the femoral head, it typically does not directly compress or injure the **femoral artery** itself. - The main vascular concern with femoral neck fractures is often the **avascular necrosis** of the femoral head due to disruption of its nutrient arteries. *Legg-Calvé-Perthes disease* - This condition involves **avascular necrosis of the femoral head** in children, primarily affecting the blood supply to the epiphysis, not the main femoral artery. - Though it affects hip vascularity, it does not typically manifest with an **absent femoral pulse**. *None of the options* - This option is incorrect because a **posterior dislocation of the hip** is a recognized cause of compromised femoral artery pulsation.

Q: The Kocher maneuver is primarily indicated for which of the following conditions?

Shoulder reduction. ***Shoulder reduction*** - The **Kocher maneuver** is a classic technique used to reduce an anterior shoulder dislocation. - It involves a specific sequence of **external rotation, adduction, and internal rotation** of the arm. *Elbow reduction* - Elbow dislocations are typically reduced using **traction-countertraction** techniques, not the Kocher maneuver. - These methods focus on overcoming muscle spasm and restoring the alignment of the **ulna and radius** with the humerus. *Ankle dislocation* - Ankle dislocations usually require **traction and direct manipulation** to realign the talus within the ankle mortise. - These reductions often address associated fractures or ligamentous injuries of the **tibiotalar joint**. *Knee dislocation* - Knee dislocations are serious injuries involving complete disruption of the **tibiofemoral joint**, and their reduction primarily involves **gentle longitudinal traction** and direct manipulation. - Prompt reduction is crucial due to the high risk of **neurovascular compromise**.

Q: A patient presents with wrist trauma and is diagnosed with a wrist sprain. Clinical examination reveals tenderness in the anatomical snuffbox, but imaging shows no evidence of fracture. In this clinical scenario, which ligament is most likely to be involved?

Scapholunate ligament. ***Scapholunate ligament*** - Tenderness in the **anatomical snuffbox** despite negative imaging for scaphoid fracture strongly suggests a **scapholunate ligament injury**. - This ligament is crucial for maintaining **carpal stability**, and its injury can lead to **DISI (dorsal intercalated segmental instability)** if not managed appropriately. *Radial collateral ligament* - Injury to the radial collateral ligament typically presents with pain and tenderness on the **radial aspect of the wrist**, but not specifically localized to the **anatomical snuffbox**. - This ligament primarily resists **ulnar deviation** and contributes to wrist stability. *Lunotriquetral ligament* - A lunotriquetral ligament injury usually manifests as pain on the **ulnar side of the wrist**, often associated with a clunking sensation, distinct from **anatomical snuffbox tenderness**. - Its disruption can lead to **VISI (volar intercalated segmental instability)**. *Ulnar collateral ligament* - Injury to the ulnar collateral ligament causes pain and tenderness on the **ulnar aspect of the wrist**, particularly with **radial deviation**. - This ligament plays a key role in stabilizing the **distal radioulnar joint (DRUJ)** and resisting radial deviation.

Q: What is the treatment for patient with hypertrophic nonunion with deformity at fracture site?

Fixation with bone grafting. ***Fixation with bone grafting*** - In a **hypertrophic nonunion**, there is biological activity and callus formation, indicating that the problem is primarily mechanical instability, which requires **fixation**. - Since a **deformity** is present, **bone grafting** may also be necessary to correct the alignment and fill any bone defects, thus providing additional structural support and osteogenic potential. *No treatment required* - A **hypertrophic nonunion** with **deformity** indicates a persistent problem that will not resolve spontaneously and requires intervention due to instability and malalignment. - Doing nothing would lead to continued pain, functional impairment, and potential long-term complications from the uncorrected deformity. *Fixation with possible bone grafting* - While fixation is crucial for hypertrophic nonunions, the presence of a **deformity** strongly suggests that bone grafting will likely be necessary, rather than just "possible," to address the morphological defect and promote union. - This option understates the probable need for grafting when a deformity is a key feature of the nonunion. *Bone grafting only* - **Bone grafting** alone does not address the fundamental issue of **mechanical instability** in a hypertrophic nonunion, which is characterized by adequate biological response but insufficient stability for healing. - Without stable **fixation**, the grafted bone would likely fail to incorporate, and the nonunion would persist or worsen.

Q: Cubitus valgus develops as a complication of which type of fracture?

Supracondylar fracture of humerus. ***Supracondylar fracture of humerus*** - **Cubitus valgus** is a common late complication of a **supracondylar fracture of the humerus**, especially if not properly reduced or fixed. - This deformity results from growth disturbance, malunion, or physeal damage at the **distal humerus**, leading to an increased carrying angle of the elbow. *Smith's fracture* - A **Smith's fracture** is a fracture of the **distal radius** with volar displacement of the distal fragment. - This fracture primarily affects the wrist and does not lead to cubitus valgus deformity, which is an elbow pathology. *Malgaigne fracture* - A **Malgaigne fracture** is an unstable pelvic fracture involving vertical shear forces affecting both anterior and posterior pelvic rings. - This fracture is located in the pelvis and has no anatomical or biomechanical connection to the elbow joint or the development of cubitus valgus. *Saddle fracture* - The term **saddle fracture** is not a standard or recognized orthopedic classification for a specific bone fracture. - This term does not correspond to a known fracture pattern that would lead to cubitus valgus.

Q: Management of displaced non comminuted intercondylar humerus fracture is?

Open reduction and internal fixation. ***Open reduction and internal fixation*** - **Displaced intra-articular fractures** of the humeral condyles, even if non-comminuted, require **anatomic reduction** and **stable fixation** to restore joint congruity and function. - ORIF allows direct visualization for accurate reduction and provides excellent stability, crucial for early range of motion and preventing long-term complications like **post-traumatic arthritis**. *Above elbow plaster cast application* - This method is typically reserved for **stable, non-displaced fractures** or as a temporary measure. - It would not achieve or maintain adequate reduction for a **displaced intra-articular fracture**, potentially leading to malunion, stiffness, and pain. *Olecranon pin traction method* - Traction methods are generally less precise for achieving **anatomic reduction** of complex articular fractures compared to ORIF. - While it can be used for some complex elbow fractures, its role in **displaced non-comminuted intercondylar fractures** is limited due to the need for precise articular alignment. *External fixation method* - External fixation is often used for **open fractures**, **severely comminuted fractures**, or when internal fixation is not feasible due to soft tissue compromise. - While it provides stability, it does not allow for the same level of **anatomic reduction** of the articular surface as ORIF for a displaced intercondylar fracture and can limit early motion.

Q: What type of fracture is associated with seat belt injuries?

Chance fracture. ***Chance fracture*** - A **Chance fracture** is a **horizontal fracture** of a vertebral body, commonly occurring at the thoracolumbar junction (T12-L2) due to hyperflexion and distraction forces, characteristic of seat belt injuries. - The classic mechanism involves **flexion over a lap belt**, causing the anterior column to compress and the posterior and middle columns to experience tensile failure. *Tear drop fracture* - A **teardrop fracture** is typically caused by severe flexion and axial compression, resulting in a triangular fragment from the **anterior inferior corner of a vertebral body**. - While serious, they are often associated with **diving accidents** or severe hyperextension, rather than the specific mechanism of a seat belt injury. *Wedge fracture* - A **wedge fracture** is a type of compression fracture where the vertebral body collapses anteriorly, forming a wedge shape. - These are common in **osteoporosis** or high-energy axial compression, but the seat belt mechanism involves a more complex combination of flexion and distraction, leading to a Chance fracture. *Whiplash injury* - **Whiplash** refers to a soft tissue injury (ligaments, muscles, discs) in the neck caused by a rapid hyperextension-hyperflexion motion, commonly seen in **rear-end car collisions**. - It is primarily a **soft tissue injury** and not a bone fracture, although severe whiplash can sometimes be associated with minor fractures, this is not its primary definition or common association.

Q: Callus formation is seen between what duration of fracture healing?

4 - 12 weeks. ***4 - 12 weeks*** - This period aligns with the **reparative phase** of fracture healing, where both **soft callus** (fibrocartilaginous) and then **hard callus** (woven bone) are formed. - Callus formation during this time significantly contributes to the **mechanical stability** of the fracture site. *0 - 2 weeks* - This initial phase primarily involves the **inflammatory stage**, characterized by **hematoma formation** and the recruitment of inflammatory cells. - While essential for initiating healing, significant structural callus formation does not typically occur within this timeframe. *2 - 4 weeks* - This period marks the transition from the inflammatory to the reparative phase, with the initial development of a **soft callus**. - However, the more robust and radiographically evident **hard callus formation** extends beyond this period. *12 - 16 weeks* - By this stage, the fracture is generally in the **remodeling phase**, where the woven bone of the hard callus is gradually replaced by **lamellar bone**. - While callus is present, its formation is more accurately described in the earlier 4-12 week period; this stage focuses on refinement and strengthening.

Question 1

Dunlop traction is a type of traction used in the management of?

Accepted Answer

Fracture of the humerus

Answer

Fracture of the radius

Answer

Fracture of the femur

Answer

Fracture of the tibia

Question 2

Palpable femur head on per rectal exam is a feature of which of the following conditions?

Accepted Answer

Posterior hip dislocation

Answer

Anterior hip dislocation

Answer

Central hip dislocation

Answer

Inferior hip dislocation

Question 3

What condition is associated with the absence of femoral artery pulsation in the affected limb?

Accepted Answer

Posterior dislocation of the hip

Answer

Fracture of the neck of femur

Answer

Legg-Calvé-Perthes disease

Answer

None of the options

Question 4

The Kocher maneuver is primarily indicated for which of the following conditions?

Accepted Answer

Shoulder reduction

Answer

Elbow reduction

Answer

Ankle dislocation

Answer

Knee dislocation

Question 5

A patient presents with wrist trauma and is diagnosed with a wrist sprain. Clinical examination reveals tenderness in the anatomical snuffbox, but imaging shows no evidence of fracture. In this clinical scenario, which ligament is most likely to be involved?

Accepted Answer

Scapholunate ligament

Answer

Radial collateral ligament

Answer

Lunotriquetral ligament

Answer

Ulnar collateral ligament

Question 6

What is the treatment for patient with hypertrophic nonunion with deformity at fracture site?

Accepted Answer

Fixation with bone grafting

Answer

No treatment required

Answer

Bone grafting only

Answer

Fixation with possible bone grafting

Question 7

Cubitus valgus develops as a complication of which type of fracture?

Accepted Answer

Supracondylar fracture of humerus

Answer

Smiths fracture

Answer

Malgaigne fracture

Answer

Saddle fracture

Question 8

Management of displaced non comminuted intercondylar humerus fracture is?

Accepted Answer

Open reduction and internal fixation

Answer

Above elbow plaster cast application

Answer

Olecranon pin traction method

Answer

External fixation method

Question 9

What type of fracture is associated with seat belt injuries?

Accepted Answer

Chance fracture

Answer

Tear drop fracture

Answer

Wedge fracture

Answer

Whiplash injury

Question 10

Callus formation is seen between what duration of fracture healing?

Accepted Answer

4 - 12 weeks

Answer

12 - 16 weeks

Answer

2 - 4 weeks

Answer

0 - 2 weeks

Trauma — MCQs

Trauma — MCQs

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