FMGE 2017 — Orthopaedics

Q: Lauge - Hansen classification belongs to:-

Ankle fracture. ***Ankle fracture*** - The **Lauge-Hansen classification system** is specifically used to categorize **ankle fractures** based on the position of the foot at the time of injury and the deforming force. - This system describes the mechanism of injury (e.g., supination-adduction, pronation-abduction) and the resulting fracture patterns of the **distal fibula, medial malleolus, and posterior malleolus**. *Femur fracture* - **Femur fractures** are typically classified by other systems, such as the **AO/OTA classification** for long bone fractures or specific patterns like **intertrochanteric** or **subtrochanteric fractures**. - The Lauge-Hansen system is **not applicable** to injuries of the femur. *Shoulder fracture* - **Shoulder fractures** (e.g., proximal humerus fractures) are commonly classified using systems like the **Neer classification**, which describes the number of displaced parts. - The Lauge-Hansen system is **not used** for classifying shoulder injuries. *Elbow fracture* - **Elbow fractures** involve the distal humerus, proximal ulna, or radial head and are classified by various systems depending on the specific bone involved (e.g., **Mason classification for radial head fractures**). - The Lauge-Hansen system is **irrelevant** to elbow an injuries. [Practice more Orthopaedics PYQs on OnCourse]

Q: A patient received an electric shock and fell down. He cannot do external rotation of shoulder and cannot move arm. What is the diagnosis:-

Posterior dislocation. ***Posterior dislocation*** - An **electric shock** or **seizure** can cause strong muscle contractions, leading to a posterior shoulder dislocation. - Inability to perform **external rotation** and limited arm movement are classic signs of a posterior shoulder dislocation. *Clavicle fracture* - While a fall can cause a **clavicle fracture**, the primary symptoms would be pain over the clavicle and a visible deformity, not specifically limited external rotation or global arm immobility. - A clavicle fracture typically doesn't present with the specific inability to externally rotate the arm. *Luxation erecta* - **Luxatio erecta** is an inferior shoulder dislocation where the arm is held in an abducted and externally rotated position, pointing upwards, which is contrary to the described symptoms of inability to move the arm and external rotation. - It is a specific type of dislocation with a distinct presentation. *Anterior dislocation* - An **anterior dislocation** is the most common type of shoulder dislocation, but it usually presents with the arm held in slight abduction and external rotation, not an inability to externally rotate. - Typically results in a visible flattening of the deltoid contour and a prominent humeral head anteriorly. [Practice more Orthopaedics PYQs on OnCourse]

2 Previous Year Questions with Answers & Explanations

Questions

All Subjects Anatomy (10)Biochemistry (4)Community Medicine (2)Dental (1)Dermatology (1)Internal Medicine (14)Microbiology (2)Obstetrics and Gynecology (3)Ophthalmology (2)Orthopaedics (2)Pathology (5)Pediatrics (2)Pharmacology (16)Physiology (5)Psychiatry (6)Radiology (1)Surgery (2)

Lauge - Hansen classification belongs to:-

A patient received an electric shock and fell down. He cannot do external rotation of shoulder and cannot move arm. What is the diagnosis:-

FMGE 2017 - Orthopaedics FMGE Practice Questions and MCQs

Question 1: Lauge - Hansen classification belongs to:-

A. Ankle fracture (Correct Answer)
B. Femur fracture
C. Shoulder fracture
D. Elbow fracture

Explanation: ***Ankle fracture*** - The **Lauge-Hansen classification system** is specifically used to categorize **ankle fractures** based on the position of the foot at the time of injury and the deforming force. - This system describes the mechanism of injury (e.g., supination-adduction, pronation-abduction) and the resulting fracture patterns of the **distal fibula, medial malleolus, and posterior malleolus**. *Femur fracture* - **Femur fractures** are typically classified by other systems, such as the **AO/OTA classification** for long bone fractures or specific patterns like **intertrochanteric** or **subtrochanteric fractures**. - The Lauge-Hansen system is **not applicable** to injuries of the femur. *Shoulder fracture* - **Shoulder fractures** (e.g., proximal humerus fractures) are commonly classified using systems like the **Neer classification**, which describes the number of displaced parts. - The Lauge-Hansen system is **not used** for classifying shoulder injuries. *Elbow fracture* - **Elbow fractures** involve the distal humerus, proximal ulna, or radial head and are classified by various systems depending on the specific bone involved (e.g., **Mason classification for radial head fractures**). - The Lauge-Hansen system is **irrelevant** to elbow an injuries.

Question 2: A patient received an electric shock and fell down. He cannot do external rotation of shoulder and cannot move arm. What is the diagnosis:-

A. Clavicle fracture
B. Luxation erecta
C. Posterior dislocation (Correct Answer)
D. Anterior dislocation

Explanation: ***Posterior dislocation*** - An **electric shock** or **seizure** can cause strong muscle contractions, leading to a posterior shoulder dislocation. - Inability to perform **external rotation** and limited arm movement are classic signs of a posterior shoulder dislocation. *Clavicle fracture* - While a fall can cause a **clavicle fracture**, the primary symptoms would be pain over the clavicle and a visible deformity, not specifically limited external rotation or global arm immobility. - A clavicle fracture typically doesn't present with the specific inability to externally rotate the arm. *Luxation erecta* - **Luxatio erecta** is an inferior shoulder dislocation where the arm is held in an abducted and externally rotated position, pointing upwards, which is contrary to the described symptoms of inability to move the arm and external rotation. - It is a specific type of dislocation with a distinct presentation. *Anterior dislocation* - An **anterior dislocation** is the most common type of shoulder dislocation, but it usually presents with the arm held in slight abduction and external rotation, not an inability to externally rotate. - Typically results in a visible flattening of the deltoid contour and a prominent humeral head anteriorly.