Efficacy of Embalming Mixture Containing Formalin, Methanol and Water on Early Stage of Decomposition: A Validation Study

ABSTRACT

Background: Stabbing with kitchen knife is a common method of homicide in Nigeria; and embalming of decomposing stabbed cadavers has been a challenge for morticians in Nigeria, because of the impairment of embalming fluid through the damaged arteries. The aim of this study is to investigate the effectiveness of an embalming mixture containing formalin, methanol and water on stabbed early decomposing carcasses using porcine analogues. Methods: Two infant pigs were used for this study. Animals were sacrificed and allowed to reach the early stage of decomposition before embalming. Cervical arterial and hypodermic embalming techniques were employed. Post-embalming changes were observed and scored. A Pearson correlation analysis was used to determine the relationship between the outcome of embalmment and the embalming mixture. Results: There was a statistically significant moderate positive correlation (r = .576, n = 42, p = .001) between outcome of embalming, and duration of embalming; a statistically significant strong negative correlation (r = -.623, n = 42, p = .001) with volume of embalming fluid; and a statistically significant moderate negative correlation (r = -.528, n = 42, p = .001) with room temperature. There was a statistically insignificant very weak positive correlation (r = .186, n = 42, p = .239) between outcome of embalming and humidity; and a statistically insignificant very weak negative correlation (r = -.141, n = 42, p = .375) with atmospheric temperature. Conclusions: This study validated the embalming methodology and fluid suitable for arresting early decomposition process of stabbed infant carcasses in Nigeria. More so, an embalming mixture containing formalin, methanol and water in equal proportion is suitable for arresting early decomposition of stabbed cadavers.