Article Text

Download PDFPDF

Mechanical model testing of rebreathing potential in infant bedding materials
  1. James N Carleton,
  2. Ann M Donoghue,
  3. Warren K Porter
  1. Directorate for Laboratory Sciences, US Consumer Product Safety Commission, Washington DC, USA
  1. Warren K Porter, US Consumer Product Safety Commission, Chemistry Division, 10901 Darnestown Road, Gaithersburg, MD 20878-2611, USA.

Abstract

Rebreathing of expired air may be a lethal hazard for prone sleeping infants. This paper describes a mechanical model to simulate infant breathing, and examines the effects of bedding on exhaled air retention. Under simulated rebreathing conditions, the model allows the monitoring of raised carbon dioxide (CO2) inside an artificial lung–trachea system. Resulting levels of CO2(although probably exaggerated in the mechanical model compared with an infant, due to the model’s fixed breathing rate and volume) suggest that common bedding materials vary widely in inherent rebreathing potential. In face down tests, maximum airway CO2 ranged from less than 5% on sheets and waterproof mattresses to over 25% on sheepskins, bean bag cushions, and some pillows and comforters. Concentrations of CO2 decreased with increasing head angle of the doll, away from the face down position. Recreations of 29 infant death scenes also showed large CO2 increases on some bedding materials, suggesting these infants could have died while rebreathing.

  • sudden infant death syndrome
  • rebreathing
  • carbon dioxide
  • infant breathing model
View Full Text

Statistics from Altmetric.com

Footnotes

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.