Immunohistochemical investigation of a pulmonary surfactant in fatal mechanical asphyxia

B. L. Zhu, K. Ishida, Masaki Q Fujita, H. Maeda

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We evaluated the usefulness of pulmonary surfactant protein A (SP-A) as a practical diagnostic marker of fatal mechanical asphyxia in forensic autopsy cases. A total of 27 cases of asphyxia were examined histologically and immunohistochemically and compared with a control group consisting of 16 cases of poisoning (n = 9) and peracute death (n = 7). Both groups showed histological findings of local atelectasis and local emphysema, congestion, intra-alveolar and interstitial edema in most cases and pulmonary hemorrhages in some cases. The mechanical asphyxia group showed a significantly increased intensity of SP-A staining in the intra-alveolar space accompanied by many massive aggregates in approximately 60% of cases, which was not found in the control group. These structures may be interpreted as aggregates of pulmonary surfactant released from the alveolar wall due to enhanced secretion caused by strong forced breathing or over-excitement of the autonomic nervous system by mechanical asphyxia. The results of our investigation suggest the practical usefulness of the immuno-histochemical detection of SP-A in distinguishing mechanical asphyxia from other types of hypoxia.

Original languageEnglish
Pages (from-to)268-271
Number of pages4
JournalInternational Journal of Legal Medicine
Volume113
Issue number5
Publication statusPublished - 2000
Externally publishedYes

Fingerprint

Pulmonary Surfactants
Asphyxia
Pulmonary Surfactant-Associated Protein A
Group
interstitial
Pulmonary Surfactant-Associated Proteins
Control Groups
Pulmonary Atelectasis
Autonomic Nervous System
Emphysema
diagnostic
Poisoning
Autopsy
Edema
death
Respiration
Staining and Labeling
Hemorrhage
Lung

Keywords

  • Asphyxia
  • Immunohistochemistry
  • Surfactant-associated protein A

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Pathology and Forensic Medicine
  • Law

Cite this

Immunohistochemical investigation of a pulmonary surfactant in fatal mechanical asphyxia. / Zhu, B. L.; Ishida, K.; Fujita, Masaki Q; Maeda, H.

In: International Journal of Legal Medicine, Vol. 113, No. 5, 2000, p. 268-271.

Research output: Contribution to journalArticle

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