Fourier-transform infrared microspectroscopy of pulmonary edema fluid for postmortem diagnosis of diabetic ketoacidosis.
Determination of the cause of death for diabetic ketoacidosis (DKA), a common and fatal acute complication of diabetes mellitus, is a challenging forensic task owing to the lack of characteristic morphological findings at autopsy. In this study, Fourier-transform infrared (FTIR) microspectroscopy coupled with chemometrics was employed to characterize biochemical differences in pulmonary edema fluid from different causes of death to supplement conventional methods and provide an efficient postmortem diagnosis of DKA. With this aim, FTIR spectra in three different situations (DKA-caused death, other causes of death with diabetes history, and other causes of death without diabetes history) were measured. The results of principal component analysis indicated different spectral profiles between these three groups, which mainly exhibited variations in proteins. Subsequently, two binary classification models were established using an algorithm of partial least squares discriminant analysis (PLS-DA) to determine whether decedents had diabetes and whether the diabetic patients died from DKA. Satisfactory prediction results of PLS-DA models demonstrated good differentiation among these three groups. Therefore, it is feasible to make a postmortem diagnosis of DKA and detect diabetes history via FTIR microspectroscopic analysis of the pulmonary edema fluid.
['Wu|Di|D|', 'Luo|Yi-Wen|YW|', 'Zhang|Ji|J|', 'Luo|Bin|B|', 'Zhang|Kai|K|', 'Yu|Kai|K|', 'Liu|Rui-Na|RN|', 'Lin|Han-Cheng|HC|', 'Wei|Xin|X|', 'Wang|Zhen-Yuan|ZY|', 'Huang|Ping|P|']
D016883:Diabetic Ketoacidosis D016002:Discriminant Analysis D006801:Humans D025341:Principal Component Analysis D011654:Pulmonary Edema D017550:Spectroscopy, Fourier Transform Infrared
Pulmonary edema fluid Diabetic ketoacidosis Cause of death Chemometrics FTIR microspectroscopy