Volume 32, Issue 2 (March 1987)

    Vitreous Humor Chemistry: The Use of Potassium Concentration for the Prediction of the Postmortem Interval

    (Received 21 October 1985; accepted 1 May 1986)

    Published Online: March

    CODEN: JFSOAD

      Format Pages Price  
    PDF 7 $25   ADD TO CART


    Abstract

    Upon review of the literature, extensive disagreement was found as to the usefulness of vitreous humor potassium concentration as a predictor of the postmortem interval (PMI). A pilot study of 1427 cases was performed to address this problem. The requisite statistical analysis for the prediction of PMI is inverse prediction. The 95% inverse prediction interval was found to be approximately ±20 h. The linear regression equation for the data was y = 0.238 x + 6.342, with a coefficient of determination (r2) of 0.374. This r2 value means that 62.6% of the variation of potassium is unaccounted for by the variation in PMI. Further studies are required to attribute this unaccounted variation to quantifiable factors. This would narrow the inverse prediction interval and enable vitreous potassium to be a useful aid in the prediction of PMI.


    Author Information:

    Richards, RG
    Forensic pathologist, Office of the Sheriff-Coroner, Orange County, Santa Ana, CA

    Stephens, RJ
    Post-baccalaureate in biology, California State University, Fullerton, CA


    Stock #: JFS11152J

    ISSN: 0022-1198

    DOI: 10.1520/JFS11152J

    ASTM International
    is a member of CrossRef.

    Author
    Title Vitreous Humor Chemistry: The Use of Potassium Concentration for the Prediction of the Postmortem Interval
    Symposium , 0000-00-00
    Committee E30