Suffocation — MCQs

10 questions

White lathery froth is seen in deaths due to:

Which of the following injuries is the most serious?

During autopsy of a 65-year-old man who collapsed while eating dinner at home, a foreign body (food bolus) is found obstructing the larynx with no other injuries. The manner of death is:

Burking includes:

Accidental choking of respiratory passage by bolus of food:

Sexual asphyxia is seen in cases of:

The dead body of a child was recovered from a river with froth around his mouth, which reappeared even after wiping it off. Which postmortem finding is not seen in this case?

The friend and victim had alcohol and got into an argument over a common girlfriend, following which the friend kills the victim by sitting on his chest and covering his nose and mouth. This is an example of?

A female was found dead in her bedroom. The room was not locked from inside. Her blood alcohol value was found to be 350 mg/dL. The picture taken at the post mortem is shown below. The diagnosis is? (AIIMS Nov 2018, AIIMS Nov 2017)

Q10

Which of the following is NOT a post-mortem finding in carbon monoxide poisoning?

Suffocation Indian Medical PG Practice Questions and MCQs

Question 1: White lathery froth is seen in deaths due to:

A. Drowning (Correct Answer)
B. Hanging
C. Mineral acid poisoning
D. Organophosphate poisoning

Explanation: ***Drowning*** - The characteristic **white lathery froth** (called **foam cone** or **mushroom froth**) appears at the mouth and nostrils due to the mixing of water, mucus, and air in the airways, often churned during respiratory efforts. - This froth is a strong indicator of **drowning**, although not always definitive of its cause. *Hanging* - Deaths due to hanging typically result from **asphyxia** due to airway obstruction or cerebral ischemia due to carotid artery compression, and do not usually involve froth formation. - While sometimes there may be some oral secretions, it is not the classic lathery, persistent foam seen in drowning. *Organophosphate poisoning* - Organophosphate poisoning causes **cholinergic crisis**, leading to excessive secretions like salivation, lacrimation, and bronchorrhea. - The secretions are usually watery to frothy, but not typically the voluminous, stable, white lathery froth seen in drowning. *Mineral acid poisoning* - Ingestion of mineral acids causes severe **corrosion** and **necrosis** of the gastrointestinal tract and airways, leading to difficulty breathing and potential laryngeal edema. - Froth is not a characteristic finding; instead, there may be **burns** around the mouth and pharynx, and signs of internal visceral damage.

Question 2: Which of the following injuries is the most serious?

A. Open pneumothorax (sucking chest wound) (Correct Answer)
B. Flail chest (multiple rib fractures with paradoxical movement)
C. Diaphragmatic injury (rupture of the diaphragm)
D. Single rib fracture (isolated rib injury)

Explanation: ***Open pneumothorax (sucking chest wound)*** - An **open pneumothorax** allows air to enter and exit the pleural space directly through a chest wall defect, leading to rapid lung collapse and severe respiratory distress. - This condition can quickly progress to a **tension pneumothorax** and compromise both ventilation and circulation, making it immediately life-threatening. *Flail chest (multiple rib fractures with paradoxical movement)* - **Flail chest** involves a segment of the thoracic cage that separates independently from the rest of the chest wall, leading to **paradoxical chest wall movement**. - While serious and often causing significant pain and respiratory compromise, it is generally less acutely life-threatening than an open pneumothorax. *Diaphragmatic injury (rupture of the diaphragm)* - A **diaphragmatic injury** can lead to herniation of abdominal contents into the chest cavity, causing respiratory distress and potential organ strangulation. - While serious and requiring surgical repair, it is often not an immediate threat to life compared to direct impairment of gas exchange seen in an open pneumothorax. *Single rib fracture (isolated rib injury)* - A **single rib fracture** is generally the least serious of the options and can cause pain, but typically does not lead to significant respiratory compromise unless associated with other complications. - Management primarily involves pain control and monitoring for potential secondary injuries like a simple pneumothorax or hemothorax.

Question 3: During autopsy of a 65-year-old man who collapsed while eating dinner at home, a foreign body (food bolus) is found obstructing the larynx with no other injuries. The manner of death is:

A. Intentional harm
B. Self-inflicted harm
C. Unintentional injury (Correct Answer)
D. Death from natural causes

Explanation: ***Unintentional injury*** - The presence of a **food bolus obstructing the respiratory tract** in a person who collapsed while eating, with **no evidence of trauma or suspicious circumstances**, is classified as **accidental/unintentional death**. - This is the most common manner of death associated with foreign body airway obstruction, particularly in elderly individuals or those with neurological conditions affecting swallowing. - **Café coronary syndrome** (choking on food mimicking cardiac arrest) is a classic example of accidental asphyxia. *Intentional harm (Homicide)* - Homicidal foreign body aspiration would require evidence of: - **Forced insertion** of the foreign body - **Other traumatic injuries** (bruising, struggle marks) - **Suspicious circumstances** at the scene - The scenario described lacks these features, making homicide unlikely. *Self-inflicted harm (Suicide)* - Suicide by foreign body aspiration is **extremely rare** and would require: - **Evidence of suicidal intent** (suicide note, psychiatric history) - Deliberate insertion beyond the gag reflex - Accidental choking while eating does not constitute suicidal behavior. *Death from natural causes* - **Natural death** results from disease processes, not external physical agents. - A foreign body causing mechanical airway obstruction is an **external cause of death**, not a natural disease process. - Even if the person had a predisposing medical condition, the immediate cause (foreign body obstruction) makes this an unintentional injury, not natural death.

Question 4: Burking includes:

A. Ligature strangulation
B. Drowning mechanism
C. Hanging technique
D. Chest compression and airway obstruction (Correct Answer)

Explanation: ***Chest compression and airway obstruction*** - Burking is a **homicidal method** of suffocation that involves **covering the mouth and nose** (airway obstruction) combined with **compressing the chest or abdomen** to prevent breathing. - Named after **William Burke**, this technique was used to kill victims without leaving obvious signs of violence, making deaths appear natural. *Ligature strangulation* - Involves using a **cord, rope, or similar object** around the neck to compress blood vessels and/or airway. - Leaves characteristic **ligature marks** on the neck, which burking aims to avoid by using manual compression instead. *Drowning mechanism* - Involves **submersion in liquid** causing respiratory impairment and asphyxia. - Completely different mechanism from burking, which involves **manual suffocation** on dry land without water involvement. *Hanging technique* - Hanging involves **suspension of the body by the neck**, causing death through compression of neck structures. - This is completely different from burking and leaves distinct **hanging marks** on the neck, which burking specifically avoids.

Question 5: Accidental choking of respiratory passage by bolus of food:

A. Cafe coronary (Correct Answer)
B. Aspiration
C. Gagging
D. Laryngospasm

Explanation: ***Cafe coronary*** - This term refers to **sudden collapse and death** that occurs during a meal, often mistaken for a heart attack, but is actually caused by **choking on a large piece of food** that obstructs the airway. - The obstruction leads to **asphyxiation** due to the bolus of food blocking the respiratory passage. *Aspiration* - **Aspiration** is the inhalation of food, liquid, or stomach contents into the lungs, which can lead to **pneumonia** or other respiratory complications. - While choking involves food entering the respiratory passage, aspiration more specifically refers to the **entry of foreign material into the lower respiratory tract**, not necessarily a complete obstruction causing immediate collapse. *Gagging* - **Gagging** is a reflex action triggered by touching the back of the throat, designed to prevent foreign objects from entering the throat. - It is a **protective mechanism** against choking rather than the choking event itself, and doesn't describe the accidental bolus obstruction. *Laryngospasm* - **Laryngospasm** is an involuntary spasm of the vocal cords that temporarily closes the airway, often triggered by irritation or an anesthetic. - While it results in airway obstruction, it is a **muscular contraction** of the larynx, not the physical blockage by a food bolus.

Question 6: Sexual asphyxia is seen in cases of:

A. Masochism (Correct Answer)
B. Sadism
C. Voyeurism
D. Fetishism

Explanation: ***Masochism*** - **Sexual asphyxia** (also known as autoerotic asphyxiation or hypoxyphilia) is a dangerous practice where an individual intentionally reduces oxygen supply to the brain during sexual activity to enhance sexual arousal through cerebral hypoxia. - This practice is associated with **sexual masochism disorder**, where sexual gratification is derived from experiencing pain, suffering, or potentially life-threatening situations. - The oxygen deprivation creates a sense of euphoria and heightened arousal, but carries significant risk of accidental death. - This is considered a particularly dangerous form of masochistic sexual behavior. *Sadism* - **Sexual sadism disorder** involves deriving sexual pleasure from inflicting pain, suffering, or humiliation on others. - The focus is on causing distress to another person, whereas sexual asphyxia is typically self-inflicted (autoerotic) or involves the practitioner being the one deprived of oxygen. *Voyeurism* - **Voyeuristic disorder** refers to obtaining sexual pleasure from secretly observing unsuspecting individuals who are naked, disrobing, or engaging in sexual activity. - It does not involve any form of physical risk, asphyxia, or oxygen deprivation. *Fetishism* - **Fetishistic disorder** is a paraphilia where sexual arousal and gratification are primarily associated with inanimate objects (e.g., shoes, underwear) or specific non-genital body parts. - This condition does not involve asphyxiation; the focus is on a particular object or body part as the source of sexual pleasure.

Question 7: The dead body of a child was recovered from a river with froth around his mouth, which reappeared even after wiping it off. Which postmortem finding is not seen in this case?

A. High concentration of arsenic from shaft of hair (Correct Answer)
B. Voluminous and ballooned out lungs
C. Cadaveric spasm with mud in closed fist
D. Paltauf's hemorrhage in sub pleura

Explanation: ***High concentration of arsenic from the shaft of hair*** - The presence of arsenic in hair is indicative of chronic **arsenic poisoning**, which is unrelated to drowning. - The scenario describes a body recovered from a river with froth, suggesting **drowning**, not poisoning. *Voluminous and ballooned out lungs* - This is a classic postmortem finding in drowning due to the aspiration of water and air trapping, leading to **pulmonary emphysema acquosum**. - The lungs appear large and distended, often with impressions of the ribs on their surfaces. *Cadaveric spasm with mud in a closed fist* - **Cadaveric spasm** (instantaneous rigor) can occur in cases of violent death, intense physical exertion, or emotional stress just before death, often seen in drowning victims. - Finding foreign material like mud or weeds clutched tightly in the hand is a significant indicator that the victim was **alive and struggling** in the water during submersion. *Paltauf's hemorrhage in subpleura* - **Paltauf's hemorrhages** are small, pinpoint hemorrhages found under the pleural surface (subpleural) and are a characteristic sign of drowning. - They result from the rupture of capillaries due to the sudden increase in intrathoracic pressure during the struggle to breathe underwater.

Question 8: The friend and victim had alcohol and got into an argument over a common girlfriend, following which the friend kills the victim by sitting on his chest and covering his nose and mouth. This is an example of?

A. Smothering
B. Traumatic asphyxia
C. Burking (Correct Answer)
D. Overlaying

Explanation: ***Burking*** - **Burking** is a form of homicide where the victim is suffocated by a combination of **smothering** (covering the nose and mouth) and **traumatic asphyxia** (pressure on the chest), often to prevent struggling noises. - This scenario perfectly describes burking: the perpetrator **sits on the chest** (applying pressure) while simultaneously **covering the nose and mouth** (smothering), which is consistent with the method used by Burke and Hare. *Smothering* - **Smothering** involves covering the **external respiratory orifices** (nose and mouth) to prevent air entry, leading to asphyxia. - While covering the nose and mouth occurs in the scenario, the additional act of sitting on the chest distinguishes this from pure smothering. Smothering alone does not involve chest compression, making burking the more accurate and complete description of this method. *Traumatic asphyxia* - **Traumatic asphyxia** occurs when **external pressure** is applied to the chest and abdomen, preventing respiratory movements. - In this case, while sitting on the chest contributes to traumatic asphyxia, the simultaneous covering of the nose and mouth adds an element beyond pure traumatic asphyxia, making burking a more specific and accurate description. *Overlaying* - **Overlaying** typically refers to an accidental form of asphyxia, usually in infants, where an adult (often the sleeping mother) unintentionally **lies on top** of the child, obstructing their breathing. - This scenario describes a deliberate act of homicide involving two adults in an argument, which is inconsistent with the accidental nature and typical victims of overlaying.

Question 9: A female was found dead in her bedroom. The room was not locked from inside. Her blood alcohol value was found to be 350 mg/dL. The picture taken at the post mortem is shown below. The diagnosis is? (AIIMS Nov 2018, AIIMS Nov 2017)

A. Traumatic asphyxia
B. Throttling (Correct Answer)
C. Café coronary
D. Bansdola

Explanation: ***Throttling*** - The autopsy image shows extensive **internal hemorrhage** and disruption of neck structures, consistent with significant compressive force applied to the neck by hands, as seen in **throttling**. - **Throttling** (manual strangulation) causes deep internal injuries including fractured **hyoid bone**, damaged **thyroid cartilage**, and **strap muscle hemorrhage**, even when external marks may be minimal or absent. - The high blood alcohol level (350 mg/dL - severe intoxication) would have impaired her ability to resist, and the unlocked room suggests **homicidal** intent rather than suicide. - Key autopsy findings: **deep neck muscle hemorrhage**, **laryngeal fractures**, and **torn blood vessels** without a ligature pattern. *Traumatic asphyxia* - Traumatic asphyxia results from severe **chest/thoracic compression** leading to acute venous congestion in the head and neck region. - Classical signs include **petechial hemorrhages** on face and conjunctivae, **cyanosis** above compression level, and relatively **intact neck structures** on autopsy. - The severe internal neck damage shown in the autopsy image is **not characteristic** of traumatic asphyxia, which primarily affects superficial vessels due to back-pressure, not deep structural injury. *Café coronary* - **Café coronary** is sudden death from **food bolus aspiration** causing airway obstruction, commonly occurring in intoxicated individuals who cannot protect their airway. - Autopsy findings would show an **obstructing food bolus in the larynx/trachea** without the extensive neck trauma and hemorrhage depicted in the image. - No manual strangulation injuries would be present. *Bansdola* - **Bansdola** is a traditional method of strangulation using a **bamboo stick or rod** twisted across the neck with a rope, used historically as torture or execution. - It causes a characteristic **linear ligature mark** with underlying soft tissue injury in a horizontal pattern across the neck. - The autopsy findings in the image show **diffuse manual strangulation injury** rather than the specific linear pattern of ligature strangulation seen in Bansdola.

Question 10: Which of the following is NOT a post-mortem finding in carbon monoxide poisoning?

A. Froth at mouth and nose
B. Blue skin discoloration (Correct Answer)
C. Cerebral edema
D. Cherry red discoloration of skin

Explanation: ***Blue skin discoloration*** - **Cyanosis**, or blue skin discoloration, indicates **hypoxia** due to deoxygenated hemoglobin. - In carbon monoxide poisoning, **carboxyhemoglobin** prevents oxygen release but does not cause deoxygenation of the remaining hemoglobin, thus typically avoiding cyanosis. *Froth at mouth and nose* - **Frothing** at the mouth and nose can be seen in various forms of asphyxia and pulmonary edema, which can be secondary to carbon monoxide poisoning if there is significant cardiac or respiratory compromise. - While not universally present, it is a possible finding associated with acute physiological distress preceding death. *Cerebral edema* - **Cerebral edema** is a common post-mortem finding in severe carbon monoxide poisoning due to **hypoxic brain injury**. - Carbon monoxide directly impairs cellular respiration, leading to widespread tissue hypoxia, including the brain, which can manifest as swelling. *Cherry red discoloration of skin* - **Cherry red discoloration** of the skin and lividity is a classic and highly characteristic post-mortem sign of carbon monoxide poisoning. - This color is due to the formation of **carboxyhemoglobin**, which has a bright red hue and is visible through the skin.

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