Mechanical asphyxia
Forensic Medicine · Topic 3
Source: NMC CBME Curriculum 2024 · Volume I · Forensic Medicine · Topic 3 · combined PDF page 219
Practice questions
- Which statement best describes the central forensic diagnostic challenge in fatal mechanical asphyxia?
- A body has scattered petechiae, but the scene and history are uncertain. Which conclusion is most appropriate?
- In the 2025 review of fatal mechanical asphyxia, what proportion of neck-compression victims reportedly lacked petechial haemorrhages?
- A suspected neck-compression death has no petechiae. Which interpretation is best supported?
- In the pooled dataset described by the 2025 comprehensive review, which category accounted for the largest reported share of mechanical asphyxia fatalities?
- At autopsy in a suspected neck-compression death, which examination strategy is specifically recommended by the 2025 review?
- A death scene suggests possible neck compression, but gross findings are equivocal. Which additional investigation is specifically advocated in the comprehensive review as part of resolving ambiguous mechanisms?
- A review of fatal mechanical asphyxia reported potential toxicological co-factors in almost one-third of all cases. Which group of substances was specifically mentioned?
- Toxicology detects a sedative in a suspected mechanical asphyxia death. What is the most defensible interpretation?
- Which combination best reflects the evidence sources recommended for evaluating a suspected fatal asphyxial event?
- Which statement about post-mortem findings in different forms of asphyxia is best supported by the forensic review literature?
- Which statement correctly describes the potential role of molecular or biochemical testing in post-mortem asphyxia diagnosis?
- Which set of techniques is identified in a review as being used in research on post-mortem biochemical markers of asphyxia?
- A post-mortem lung study finds changes in molecules associated with hypoxia. Which conclusion is most appropriate?
- A laboratory proposes hypoxia-related microRNA analysis as the sole routine test to determine mechanical asphyxia. Which appraisal best matches the cited literature?
- In forensic descriptions of material entering the respiratory tract, why should the terms obturation, aspiration and inhalation be used carefully?
- Which factor is specifically identified as influencing the mechanism and morphological findings when foreign material enters the respiratory tract?
- Which distinction is emphasized when interpreting the term inhalation in a suspected mechanical-asphyxia case?
- Which interpretation best reflects the classification framework for non-drowning asphyxia described in the review literature?
- A forensic report must distinguish a positional or traumatic compression mechanism from strangulation. Which statement is most consistent with the cited classification review?
- A suspected hanging has findings historically considered useful, but their frequency varies markedly across published case histories. Which conclusion is best supported by the recent review?
- A pathologist is reviewing a historically accepted sign of hanging. What does the recent review recommend regarding such signs?
- An autopsy shows no distinctive gross lesion, while scene evidence and history strongly suggest a mechanical airway event. Which approach is most appropriate?
- Which statement best explains why a proposed biomarker panel cannot yet be used as a universal forensic protocol for asphyxia?
- A case has equivocal circumstances and inconclusive gross autopsy findings. Which statement about molecular investigation is most appropriate?
- Which conclusion about pulmonary hypoxia-related molecular changes is supported by the review literature?
- A proposed diagnosis of mechanical asphyxia is based on one nonspecific lesion, with no supportive scene or history. What is the best forensic response?
- A suspected mechanical-asphyxia case has possible post-mortem artefact affecting external findings. Which strategy best addresses this limitation?
- A proposed hanging sign is reported at different frequencies in separate published case histories. Which research need is identified by the review?
- Why is a forensic opinion on suspected asphyxia particularly vulnerable to overinterpretation when based only on a checklist of autopsy signs?
- A death involves evidence of both mechanical compression and drug exposure. Which approach is most appropriate when interpreting cause-related evidence?
- Which statement best distinguishes a promising diagnostic research marker from an established forensic test?
- Which statement about absence of lesions in a suspected non-drowning asphyxial death is most appropriate?
- Which conclusion is best supported when scene evidence, deep-tissue examination and targeted toxicology point in the same direction, although no single gross sign is diagnostic?