Phases of DVI Operations — MCQs
Which of the following phases are directly involved in the recovery phase of the disaster cycle?
What is the investigation of choice for blunt abdominal trauma in an unstable patient?
Disputed maternity can be solved by using the following tests, EXCEPT:
Certain obligations on the part of a doctor who undertakes a postmortem examination are the following, EXCEPT:
Which traditional method is considered most reliable for personal identification in forensic science?
Which of the following is the least suitable source for DNA extraction?
Who orders the autopsy in the case of a Road Traffic Accident (RTA)?
After a postmortem examination, the body has to be handed over to
Following a major fire in a hotel, 50 severely charred bodies need identification. Initial assessment shows: Group A (20 bodies) - moderate charring with some fingerprint possibility; Group B (15 bodies) - severe charring, teeth intact; Group C (15 bodies) - extreme charring with fragmentation. Evaluate the most appropriate sequential identification strategy considering efficiency, cost, and identification success rate.
A country is developing a disaster victim identification protocol for mass casualty events. Considering resource limitations, technological capabilities, and medico-legal requirements, which combination of primary and secondary identification methods would provide the most comprehensive and cost-effective DVI system?
Phases of DVI Operations Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following phases are directly involved in the recovery phase of the disaster cycle?
- A. Response and Rehabilitation
- B. Mitigation and Rehabilitation
- C. Response and Preparedness
- D. Rehabilitation and Reconstruction (Correct Answer)
Explanation: ***Rehabilitation and Reconstruction*** - **Rehabilitation** is the short-term recovery phase focusing on restoring essential services, providing temporary shelter, medical care, and supporting affected populations to resume normal activities. - **Reconstruction** is the long-term recovery phase involving rebuilding damaged infrastructure, permanent housing, economic restoration, and development improvements. - These two phases together constitute the **recovery phase** of the disaster cycle according to standard disaster management frameworks (WHO, NDMA). *Mitigation and Rehabilitation* - While **rehabilitation** is correctly part of recovery, **mitigation** is traditionally considered a separate continuous phase or part of preparedness, focused on reducing future disaster risks. - **Mitigation** measures are implemented throughout the disaster cycle, not specifically as a direct component of the recovery phase. *Response and Rehabilitation* - **Response** refers to immediate life-saving actions during and immediately after a disaster (search and rescue, emergency medical care, evacuation). - **Response** precedes the recovery phase and is distinct from it, though **rehabilitation** is indeed part of recovery. *Response and Preparedness* - **Preparedness** involves planning, training, and resource allocation before a disaster occurs. - **Response** is the immediate action during/after the disaster. - Neither constitutes the recovery phase, which follows after the immediate response is complete.
Question 2: What is the investigation of choice for blunt abdominal trauma in an unstable patient?
- A. X-ray abdomen
- B. MRI
- C. USG (Correct Answer)
- D. Diagnostic Peritoneal Lavage (DPL)
Explanation: ***USG (FAST Exam)*** - In an **unstable patient** with blunt abdominal trauma, **Focused Assessment with Sonography for Trauma (FAST) exam** is the investigation of choice. - It is **rapid, non-invasive, and bedside**, allowing immediate detection of **free fluid** (blood) in the peritoneal cavity, pericardium, and pleural spaces without transporting the patient. - Guides immediate decision for **laparotomy** in hemodynamically unstable patients. - **Note:** In **stable patients**, **CT abdomen** is the gold standard as it provides detailed anatomical information, but it requires patient transport and time. *X-ray abdomen* - Provides limited information in blunt trauma, primarily showing **free air** (bowel perforation) or **bony fractures**. - **Not sensitive** for detecting intraperitoneal bleeding, which is the primary concern in unstable patients. *MRI* - Offers excellent soft tissue detail but is **time-consuming** and requires the patient to be **hemodynamically stable**. - **Impractical** for unstable trauma patients requiring rapid assessment and intervention. *Diagnostic Peritoneal Lavage (DPL)* - An **invasive procedure** that is sensitive for detecting intra-abdominal hemorrhage. - Has largely been **replaced by FAST exam** in most trauma centers due to FAST being non-invasive, rapid, and repeatable. - DPL has a **higher false-positive rate** and cannot identify the source of bleeding.
Question 3: Disputed maternity can be solved by using the following tests, EXCEPT:
- A. Blood grouping
- B. HLA typing
- C. DNA fingerprinting
- D. Precipitin test (Correct Answer)
Explanation: ***Precipitin test*** - The **precipitin test** is used to determine the origin of a **blood sample**, specifically whether it is **human or animal blood**, by detecting species-specific proteins. It is not used for assessing maternity. - This test is primarily employed in **forensic serology** to differentiate between blood from different animal species, making it irrelevant for paternity or maternity disputes. *Blood grouping* - **Blood grouping** (e.g., ABO and Rh systems) can be used to **exclude paternity or maternity** by comparing the blood types of the child, mother, and alleged father. - If the child's blood type is incompatible with the alleged parents based on Mendelian inheritance, one or both can be excluded. *HLA typing* - **HLA typing** (Human Leukocyte Antigen) is a more powerful genetic marker system than ABO/Rh for determining paternity or maternity. - It involves analyzing highly polymorphic genes on chromosome 6 that encode cell surface proteins, providing a more definitive means of **inclusion or exclusion**. *DNA fingerprinting* - **DNA fingerprinting** (also known as **DNA profiling**) is the **most accurate and widely accepted method** for resolving paternity and maternity disputes. - It analyzes highly variable regions of DNA unique to each individual, providing a statistically strong basis for **inclusion or exclusion** by comparing genetic profiles.
Question 4: Certain obligations on the part of a doctor who undertakes a postmortem examination are the following, EXCEPT:
- A. Routinely record all positive findings and important negative ones
- B. He must keep the police informed about the findings (Correct Answer)
- C. The examination should be meticulous and complete
- D. He must preserve viscera and send for toxicology examination in case of poisoning
Explanation: ***He must keep the police informed about the findings*** - This is **NOT a formal obligation** of the doctor conducting a postmortem examination. - The doctor's primary duty is to conduct a thorough, objective examination and prepare a **formal postmortem report** that is submitted to the authority who requisitioned the examination (magistrate/police as per CrPC Section 174). - While findings may eventually reach the police through the official report, there is **no obligation to informally update or keep police informed** during the examination process. - The doctor's role is that of an **independent expert witness** to the court, not an investigative assistant to the police. - Maintaining independence and objectivity requires the doctor to document findings formally rather than providing ongoing informal updates to investigating officers. *Routinely record all positive findings and important negative ones* - This IS a **fundamental obligation** for any doctor performing a postmortem examination. - Both positive findings (pathological changes, injuries) and significant negative findings (absence of expected pathology) must be documented to provide a comprehensive and accurate record. - This meticulous documentation ensures the **integrity, reliability, and legal validity** of the postmortem examination and its conclusions. *The examination should be meticulous and complete* - This IS a **professional, ethical, and legal obligation** for any doctor undertaking a postmortem examination. - A systematic and thorough examination of all body systems is essential to accurately determine the cause of death and identify all relevant findings. - Incomplete examinations can lead to **missed diagnoses and miscarriage of justice** in medico-legal cases. *He must preserve viscera and send for toxicology examination in case of poisoning* - This IS a **crucial obligation** when poisoning is suspected or cannot be ruled out based on the postmortem findings. - Relevant viscera (liver, kidney, stomach contents) and bodily fluids (blood, urine) must be preserved in appropriate containers for subsequent toxicological analysis. - This step is **essential to confirm or exclude toxicological involvement** in the death and is a standard protocol in medico-legal postmortem examinations as per established guidelines.
Question 5: Which traditional method is considered most reliable for personal identification in forensic science?
- A. Gustafson's method
- B. Anthropometry
- C. DNA profiling
- D. Galton method (Correct Answer)
Explanation: ***Galton method*** - The **Galton method**, which refers to **fingerprint analysis**, is considered a highly reliable traditional method for personal identification due to the uniqueness and permanence of fingerprints. - No two individuals, even identical twins, have been found to have the exact same **fingerprint patterns**, making it a robust identifier. *Gustafson's method* - **Gustafson's method** is a technique used for **age estimation based on dental changes**, not for definitive personal identification. - While it provides an estimate of age, it cannot uniquely identify an individual. *DNA profiling* - **DNA profiling** is indeed the most reliable method for personal identification in modern forensic science, but it is not considered a "traditional" method. - The question specifically asks for a **traditional method**, distinguishing it from newer genetic techniques. *Anthropometry* - **Anthropometry** involves the measurement of the **human body and its parts**, often used for classification or to establish demographic profiles. - It is not reliable for unique personal identification as many individuals share similar physical measurements.
Question 6: Which of the following is the least suitable source for DNA extraction?
- A. CSF (Correct Answer)
- B. Hair roots
- C. Semen
- D. Buccal mucosa
Explanation: ***CSF*** - **Cerebrospinal fluid (CSF)** contains a relatively **low number of cells**, making it a poor source for DNA extraction compared to other bodily fluids due to the scarcity of nuclear DNA. - While DNA can be extracted from CSF for specific diagnostic purposes (e.g., detection of pathogens), it is generally **not the preferred source** for DNA profiling or genetic studies due to the limited yield and potential for degradation. *Hair roots* - **Hair roots** (specifically the follicular tag) contain a significant number of **nucleated cells**, making them an excellent source for DNA extraction. - The DNA extracted from hair roots is often robust and sufficient for **forensic analysis** and genetic testing. *Semen* - **Semen** contains a high concentration of **sperm cells**, which are rich in nuclear DNA, making it a very good source for DNA extraction. - It is frequently used in **forensic investigations** and paternity testing due to its high DNA content. *Buccal mucosa* - **Buccal cells** scraped from the inside of the cheek provide a non-invasive and **abundant source of nucleated cells** for DNA extraction. - This method is widely used for genetic testing, **ancestry tracing**, and clinical diagnostics because of its ease of collection and high DNA yield.
Question 7: Who orders the autopsy in the case of a Road Traffic Accident (RTA)?
- A. A. Forensic expert
- B. B. Police (Correct Answer)
- C. C. Lawyer
- D. D. Forensic doctor
Explanation: **B. Police** - In cases of Road Traffic Accidents (RTAs) and other **medico-legal deaths**, the **police** are typically responsible for ordering an autopsy. - This is because the death is suspicious and may involve criminal investigation, requiring formal authorization from law enforcement to establish the cause and manner of death. *A. Forensic expert* - A **forensic expert** performs the autopsy but does not have the authority to order it. - Their role is to conduct the examination and provide expert findings to the investigating authorities. *C. Lawyer* - A **lawyer** may be involved in the legal proceedings related to the RTA but does not have the authority to order an autopsy. - Their role is to represent clients and use the autopsy findings as evidence in court. *D. Forensic doctor* - A **forensic doctor** (or forensic pathologist) is the medical professional who conducts the autopsy. - They do not initiate the autopsy themselves but perform it upon the request of authorized parties, such as the police or a medical examiner/coroner.
Question 8: After a postmortem examination, the body has to be handed over to
- A. Magistrate
- B. Investigating police officer (Correct Answer)
- C. Relative of victim
- D. The civil authorities
Explanation: **Investigating police officer** - After a postmortem examination, the body is typically handed over to the **investigating police officer** because the examination is often conducted as part of a forensic investigation. - The police officer is responsible for managing the evidence and ensuring the proper chain of custody for the body in cases involving **unnatural or suspicious death**. *Magistrate* - A magistrate's role involves **judicial oversight** and issuing orders, but they do not directly take physical custody of a body post-mortem. - Their involvement typically precedes the examination, such as ordering an inquest, rather than handling the body itself. *Relative of victim* - While the ultimate disposition of the body is to the family for burial or cremation, **direct handover immediately after a forensic postmortem exam** to relatives is generally not the protocol. - The body must first be released by the authorities, often through the police, after all necessary investigative procedures are complete. *The civil authorities* - "Civil authorities" is a broad term; while the police are a type of civil authority, this option is less specific than the direct involvement of the **investigating police officer**. - Other civil authorities, such as local government agencies, do not typically take custody of a body following a postmortem examination in the context of an investigation.
Question 9: Following a major fire in a hotel, 50 severely charred bodies need identification. Initial assessment shows: Group A (20 bodies) - moderate charring with some fingerprint possibility; Group B (15 bodies) - severe charring, teeth intact; Group C (15 bodies) - extreme charring with fragmentation. Evaluate the most appropriate sequential identification strategy considering efficiency, cost, and identification success rate.
- A. Complete post-mortem data collection on all bodies, then prioritize identification based on ante-mortem data availability
- B. Dental examination on all bodies first as teeth survive fire, then DNA on unidentified cases
- C. Simultaneous DNA analysis on all bodies for uniformity, followed by dental and fingerprint verification
- D. Fingerprints on Group A, dental on Group B, DNA on Group C; then DNA on unidentified from A and B (Correct Answer)
Explanation: ***Fingerprints on Group A, dental on Group B, DNA on Group C; then DNA on unidentified from A and B*** - This approach utilizes the **DVI (Disaster Victim Identification)** principle of using the least invasive and most cost-effective reliable methods first based on the state of remains. - **Fingerprinting** is the fastest for Group A, **Forensic Odontology** is highly resistant to heat for Group B, and **DNA analysis** is reserved for the fragmented remains in Group C or as a secondary backup. *Complete post-mortem data collection on all bodies, then prioritize identification based on ante-mortem data availability* - While thorough, this method is **time-inefficient** in a mass disaster scenario where rapid identification is required to manage logistics and family grieving. - It fails to triage the bodies based on their **physical condition**, leading to a bottleneck in processing fragmented remains alongside more intact ones. *Dental examination on all bodies first as teeth survive fire, then DNA on unidentified cases* - Although **dental pulp** and enamel are heat-resistant, performing dental exams on Group A is less efficient than **dactyloscopy** if fingerprints are still viable. - This strategy ignores the utility of **fingerprints**, which provide a faster match if ante-mortem records (like national IDs) are readily available. *Simultaneous DNA analysis on all bodies for uniformity, followed by dental and fingerprint verification* - This is the least **cost-effective** strategy, as **DNA extraction** and sequencing are expensive and labor-intensive compared to primary identifiers. - DNA should typically be used as a **confirmatory** tool or when primary methods (fingerprints/teeth) are not feasible due to extreme **charring or fragmentation**.
Question 10: A country is developing a disaster victim identification protocol for mass casualty events. Considering resource limitations, technological capabilities, and medico-legal requirements, which combination of primary and secondary identification methods would provide the most comprehensive and cost-effective DVI system?
- A. Primary: DNA profiling only; Secondary: Photography and anthropometry
- B. Primary: DNA and radiological comparison; Secondary: Dental, fingerprints, and facial recognition
- C. Primary: Dental and fingerprints; Secondary: DNA, radiological comparison, and anthropometry
- D. Primary: Fingerprints, dental, and DNA; Secondary: Medical records, tattoos, and personal effects (Correct Answer)
Explanation: ***Primary: Fingerprints, dental, and DNA; Secondary: Medical records, tattoos, and personal effects*** - According to **INTERPOL guidelines**, the three scientifically recognized **primary methods** for positive identification are **fingerprints**, **dental (odontology)** comparison, and **DNA profiling**. - **Secondary methods** such as **medical findings**, **tattoos**, and **personal effects** (jewelry, clothing) serve as supporting evidence but are generally insufficient for standalone legal identification. *Primary: DNA profiling only; Secondary: Photography and anthropometry* - Relying solely on **DNA** as a primary method is not cost-effective and ignores faster, cheaper primary methods like **dactyloscopy** (fingerprints). - **Photography** and **anthropometry** are considered unreliable for positive identification in mass disasters due to post-mortem changes and lack of unique specificity. *Primary: DNA and radiological comparison; Secondary: Dental, fingerprints, and facial recognition* - **Dental records** and **fingerprints** are primary identifiers and should not be relegated to secondary status. - **Radiological comparison** is typically classified as a **secondary method** (or supporting primary evidence) because it requires specific, high-quality ante-mortem records that may not be available. *Primary: Dental and fingerprints; Secondary: DNA, radiological comparison, and anthropometry* - While dental and fingerprints are primary, **DNA** must also be categorized as a **primary method** because it provides the highest level of scientific certainty when others fail. - Classification of **DNA** as secondary is medically and legally incorrect under **Disaster Victim Identification (DVI)** international protocols.
Want unlimited practice?
Get full access to all questions, explanations, and performance tracking.
Start For Free