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Comparative Excretory Systems02:24

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Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
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The Effects of Postmortem Body Storage Conditions on Diaper Weight.

Kelsy Carr1, Yuming Zhang2, Gurnoor Bhatia1

  • 1Griffith University School of Medicine.

The American Journal of Forensic Medicine and Pathology
|December 3, 2025
PubMed
Summary

Diaper weights can estimate hydration in infant deaths. Storing diapers in sealed body bags minimizes weight changes, offering a more stable method for assessing fluid status in postmortem pediatric cases.

Keywords:
autopsybody storagediaperforensic pathologyfridgehydrationpaediatricspostmortem

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Area of Science:

  • Forensic Pathology
  • Paediatric Mortality Studies
  • Biomedical Science

Background:

  • Assessing hydration status in paediatric deaths is crucial for understanding mortality contributors like dehydration.
  • Diaper weight has been explored as an indirect method for estimating fluid status postmortem.
  • Existing literature indicates environmental storage conditions may impact the accuracy of diaper weight estimations.

Purpose of the Study:

  • To investigate the impact of various postmortem storage conditions on the weight stability of commercially available diapers.
  • To determine if diaper weight changes are significant enough to affect hydration status estimations.
  • To evaluate the utility of diapers stored in body bags versus exposed environments for postmortem hydration assessment.

Main Methods:

  • Five replicates of dry, wet, and saturated diapers were used.
  • Diapers were stored at two temperatures (4 °C and -20 °C).
  • Storage was either within a sealed body bag or exposed to the environment for 5 consecutive days, with daily weight measurements.

Main Results:

  • Statistically significant weight changes were observed across all tested diaper groups and conditions (P < 0.05).
  • Dry diapers generally increased in weight, while wet/saturated diapers decreased, with changes up to ~30% and ~9% respectively.
  • Diapers stored in sealed body bags showed minimal average weight changes (<1 g), regardless of temperature, indicating greater stability.

Conclusions:

  • Postmortem environmental conditions significantly influence diaper weight, potentially affecting hydration status estimations.
  • Sealed body bags provide a more stable environment for diaper storage, minimizing weight fluctuations.
  • Diapers stored in sealed body bags may offer a more reliable method for assessing hydration status in paediatric deaths.