Injuries and Their Significance Practice Questions

Q: Graze is a form of:

Abrasion. ***Abrasion*** - A graze is a superficial injury resulting from friction against a rough surface, which is the definition of an **abrasion**. - It involves the **epidermis** and possibly the superficial dermis, characterized by scraping or rubbing off the skin's surface. *Contusion* - A contusion, or **bruise**, involves damage to blood vessels beneath the skin but without a break in the skin's surface. - It presents as discoloration due to blood extravasation, rather than a scraping injury. *Incised wound* - An incised wound is a **clean-cut injury** caused by a sharp object, leading to smooth edges and often significant bleeding. - It typically goes deeper than an abrasion and is not characterized by the scraping motion associated with a graze. *Lacerated wound* - A lacerated wound is an **irregular, jagged tear** in the skin caused by a blunt force trauma, often involving crushing or stretching of tissues. - Unlike a graze, it involves a deep, irregular tear and is not caused by superficial friction.

Q: A 25-year-old person developed right corneal opacity following injury to the eye. Keratoplasty of right eye was done and vision was restored. Medico-legally such injury is:

Simple. ***Simple*** - The injury resulted in corneal opacity that was **successfully treated with keratoplasty and vision was restored**. - Under IPC Section 320, **grievous hurt** requires **permanent privation of sight**, not temporary visual impairment. - Since vision was restored after treatment, there is **no permanent damage**, making this a **simple injury**. - Simple injuries may require medical treatment and cause temporary incapacitation, but do not result in permanent impairment. *Grievous* - Grievous hurt under IPC Section 320 includes **permanent privation of the sight of either eye**. - The key word is **permanent** - since vision was restored after keratoplasty, the visual loss was temporary, not permanent. - This injury does not meet the criteria for grievous hurt despite requiring surgical intervention. *Dangerous* - "Dangerous" is not a specific medico-legal classification of injury under IPC Section 320. - This term may describe the potential severity but is not used to categorize injuries legally. *Non-grievous* - While technically correct (as non-grievous means not grievous), the proper legal term is **"simple injury"**. - In medico-legal practice, injuries are classified as either grievous or simple, not as "non-grievous".

Q: Vitriolage is punishable under which section?

Sec. 326-A IPC. ***Sec. 326-A IPC*** - This section specifically deals with the offense of voluntarily causing **grievous hurt by use of acid**, or commonly referred to as **vitriolage**. - It prescribes a stringent punishment of imprisonment which shall not be less than ten years but which may extend to imprisonment for life, and with fine. *Sec. 320 IPC* - This section defines what constitutes **"grievous hurt"** under the Indian Penal Code. - It does not prescribe punishment but rather lists categories of injuries considered grievous, such as **emasculation**, **loss of sight/hearing**, or **fracture of bone**. *Sec. 304-A IPC* - This section deals with **causing death by negligence**, which is a distinct offense from intentionally causing harm. - It applies in cases where there is no intention to cause death, but death occurs due to a rash or negligent act. *Sec. 326 IPC* - This section addresses **voluntarily causing grievous hurt by dangerous weapons or means**. - While acid can be considered a dangerous means, Section 326-A was specifically introduced to deal with acid attacks due to their severe and often permanent consequences.

Q: Which of the following may be seen in an exit wound?

Everted edges. ***Everted edges*** - The force of the projectile exiting the body pushes tissue outwards, causing the wound edges to **evert**, or turn outward. - This is a hallmark feature of an **exit wound**, distinguishing it from an entry wound. *Tattooing* - **Tattooing** (or stippling) refers to embedded gunpowder particles in the skin, which occurs when a weapon is fired at close range. - This is seen around **entry wounds**, not exit wounds, as the projectile has already passed through the body. *Inverted edges* - **Inverted edges** (turned inward) are characteristic of **entry wounds**, where the projectile first punctures the skin, pushing tissue inward. - This is the opposite of what is seen in an exit wound. *Abrasion collar* - An **abrasion collar** (or contusion ring) is a circular abrasion around an **entry wound** caused by the projectile scraping against the skin as it enters. - It is not typically present in an exit wound as the skin is torn outwards rather than compressed by the entering projectile.

Q: Organs first to be injured in air blast:

Ear, lung. ***Ear, lung*** - The **ear** and **lungs** are the first organs injured in an air blast due to their high air-tissue interfaces, making them extremely vulnerable to sudden pressure changes. - The **tympanic membrane** in the ear is very sensitive to barotrauma, and the **alveoli** in the lungs can rupture easily. *Pancreas, duodenum* - These organs are located deep within the abdomen and are primarily protected by other structures, making them less susceptible to direct **blast overpressure** injury. - Injuries to these organs are more typical of **secondary or tertiary blast injuries**, such as blunt trauma from impact or penetrating trauma from fragments. *Liver, muscle* - The **liver** is a solid organ that is relatively resistant to direct blast overpressure, though it can be damaged by crushing forces. - **Muscle tissue** is also dense and less vulnerable to direct air blast effects compared to air-filled organs. *Kidney, spleen* - Similar to the liver, the **kidneys** and **spleen** are solid, dense organs that are less susceptible to direct **primary blast injury**. - Injuries to these organs typically occur from **secondary or tertiary blast mechanisms**, like penetrating trauma or blunt force.

Q: Lathi can cause all of the following injuries, except:

Abrasion collar. ***Abrasion collar*** - An **abrasion collar** is a specific injury pattern seen exclusively in **gunshot wounds**, caused by the friction and heat of the bullet as it enters the skin - This creates a rim of abraded skin around the entry wound, which is pathognomonic for firearm injuries - A **lathi** (stick or baton) is a blunt force object and **cannot produce** this type of wound pattern *Contusion* - A **contusion** (bruise) is a classic injury from blunt force trauma - A lathi strike commonly causes contusions by rupturing small blood vessels beneath intact skin - This results in hemorrhage into soft tissues without breaking the skin surface *Incised looking lacerated wound* - While a **lathi** is a blunt object, when struck with significant force or at a tangential angle, it can cause **lacerations** that may appear incised - The tearing of skin over bony prominences can create wounds with relatively clean, straight edges - These "incised-looking" lacerations result from skin being crushed and split, mimicking cut wounds *Fissured fracture* - A **lathi** struck with sufficient force can cause **fissured fractures** - linear cracks in bone without significant displacement - This type of fracture commonly occurs in skull bones when struck by cylindrical blunt objects - The impact delivers concentrated force along a line, creating characteristic linear fracture patterns

Q: Artificial bruises are produced by:

Marking nut. ***Marking nut*** - The **marking nut** (*Semecarpus anacardium*) contains a vesicant oil that causes a chemical burn, mimicking a true bruise. - This effect is often described in forensic medicine as producing **artificial bruises** or **factitious injuries**. *Capsicum* - **Capsicum** (found in chili peppers) causes irritation and a burning sensation, but typically does not produce dermal lesions that resemble a bruise. - It might cause redness due to vasodilatation but not the characteristic blue-black discoloration of a bruise. *Rati* - **Rati**, or **Abrus precatorius** (rosary pea), is highly toxic due to abrin, a potent toxin. - While ingestion or injection can cause severe systemic effects, it is not known to produce localized artificial bruises on the skin. *Croton* - **Croton** oil, derived from *Croton tiglium*, is a strong purgative and skin irritant. - It can cause severe blistering and inflammation upon topical application but does not typically create lesions that are mistaken for a bruise.

Q: Stellate wound is produced with firearm in:

Contact shot. ***Contact shot*** - In a **contact shot**, gases and matter from the gun barrel are forced directly into the wound, causing the skin to stretch, tear, and burst outward, creating a **stellate or star-shaped wound**. - The hot gases and unburnt powder entering the wound create an exit for themselves, often leading to these characteristic irregular, radiating tears. *Close shot* - A close shot involves the skin being close to the muzzle but not directly touching, leading to a circular or oval wound with a surrounding area of **singeing**, **soot deposition**, and **powder tattooing**. - While there is gas effect, it's not as confined or forceful behind the skin as in a contact shot, thus not typically producing a stellate wound. *Distant shot* - A distant shot occurs when the muzzle is far enough from the target surface that only the **bullet strikes the skin**, leaving a relatively clean, circular or oval entry wound without significant singeing or tattooing. - The effects of gas and unburnt powder are not present at the wound site in a distant shot. *Range within 60 cm* - While a range within 60 cm (approximately 2 feet) can encompass close shots, it's a broad category and doesn't specifically define the conditions necessary for a stellate wound. - A stellate wound requires conditions more specific to a contact shot, where the muzzle is pressed against the skin.

Q: Marshall's triad is seen in:

Explosive injury. ***Explosive injury*** - Marshall's triad components, including **blast lung**, **abdominal hemorrhage**, and **tympanic membrane rupture**, are characteristic injuries of explosions, especially those involving pressure waves. - The triad highlights distinct patterns of organ damage caused by the high-energy transfer from blast forces. *Lightning injury* - Lightning injuries can cause diverse effects like **cardiac arrest**, **neurological damage**, and **burns**, but they do not typically present as Marshall's triad. - The primary mechanism is electrical, leading to distinct injury patterns different from blast trauma. *Gunshot injury* - Gunshot wounds create localized tissue damage along the projectile's path and a temporary cavity, but they do not cause generalized blast effects or the specific triad of Marshall. - The injury severity depends on the **caliber**, **velocity**, and **trajectory** of the bullet. *Drowning injury* - Drowning is characterized by **respiratory impairment** resulting from submersion or immersion in liquid, leading to **hypoxia** and multi-organ failure. - Its pathophysiology and presentation are entirely distinct from explosive trauma.

Q: In air blast injury, which is the most commonly affected organ? CMC (Vellore) 07; AI 09; AIIMS 10; NEET 14

Eardrum. ***Eardrum*** - The **eardrum (tympanic membrane)** is the most commonly affected organ in air blast injuries due to its thin, delicate structure and direct exposure to pressure waves. - Its rupture threshold is relatively low, making it highly susceptible to damage from sudden changes in air pressure. *Stomach* - While **hollow organs** like the stomach can be affected by blast injuries (secondary to barotrauma), they are less commonly ruptured than the eardrum. - Injury to the stomach generally requires a higher intensity blast or immersion in water. *Lungs* - **Pulmonary barotrauma** (blast lung) is a serious consequence of blast injury, characterized by hemorrhage, edema, and contusions. - However, the eardrum is far more frequently (and often mildly) injured compared to severe lung damage. *Liver* - The **liver**, being a solid organ, is generally more resistant to direct blast effects compared to hollow or air-filled structures. - Liver injuries from blast are more often due to secondary trauma (e.g., impact from flying debris) rather than the primary blast wave itself.

Question 1

Graze is a form of:

Accepted Answer

Abrasion

Answer

Contusion

Answer

Incised wound

Answer

Lacerated wound

Question 2

A 25-year-old person developed right corneal opacity following injury to the eye. Keratoplasty of right eye was done and vision was restored. Medico-legally such injury is:

Accepted Answer

Simple

Answer

Dangerous

Answer

Grievous

Answer

Non-grievous

Question 3

Vitriolage is punishable under which section?

Accepted Answer

Sec. 326-A IPC

Answer

Sec. 320 IPC

Answer

Sec. 304-A IPC

Answer

Sec. 326 IPC

Question 4

Which of the following may be seen in an exit wound?

Accepted Answer

Everted edges

Answer

Tattooing

Answer

Inverted edges

Answer

Abrasion collar

Question 5

Organs first to be injured in air blast:

Accepted Answer

Ear, lung

Answer

Pancreas, duodenum

Answer

Liver, muscle

Answer

Kidney, spleen

Question 6

Lathi can cause all of the following injuries, except:

Accepted Answer

Abrasion collar

Answer

Contusion

Answer

Incised looking lacerated wound

Answer

Fissured fracture

Question 7

Artificial bruises are produced by:

Accepted Answer

Marking nut

Answer

Capsicum

Answer

Rati

Answer

Croton

Question 8

Stellate wound is produced with firearm in:

Accepted Answer

Contact shot

Answer

Close shot

Answer

Distant shot

Answer

Range within 60 cm

Question 9

Marshall's triad is seen in:

Accepted Answer

Explosive injury

Answer

Lightning injury

Answer

Gunshot injury

Answer

Drowning injury

Question 10

In air blast injury, which is the most commonly affected organ? CMC (Vellore) 07; AI 09; AIIMS 10; NEET 14

Accepted Answer

Eardrum

Answer

Stomach

Answer

Lungs

Answer

Liver

Injuries and Their Significance — MCQs

Injuries and Their Significance — MCQs

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