Document Detail

Gas dispersal potential of infant bedding of sudden death cases (II): Mathematical simulation of O2 deprivation around the face of infant mannequin model.
MedLine Citation:
PMID:  19342284     Owner:  NLM     Status:  MEDLINE    
We assessed O(2) gas deprivation potential of bedding that had actually been used by 26 infants diagnosed with sudden unexpected infant death using FiCO(2) time course of baby mannequin model. All cases were the same ones in our poster paper (I). Mathematically, time-FiCO(2) (t) graphs were given as FiCO(2) (t)=C(1-e(Dt)). Here, "C" approximates the maximum FiCO(2) value, while "D" is the velocity to reach maximum FiCO(2). FiO(2) in a potential space around the mannequin's nares was estimated using a formula: FiO(2)=0.21-FiCO(2)/RQ. RQ is the respiratory quotient, and the normal human value is 0.8. The graph pattern of FiO(2) is roughly the inverse of the FiCO(2) time course. Four cases showed the bottom of estimated FiO(2) to be more than 15%, 15 were 15-6%, and the other seven were 6% or less. Considering the minimal tissue stores of O(2), changes in FiO(2) may be affected by both CO(2) production and gas movement around the infant's face. Especially, the latter seven cases may suggest the participation of the role not only of CO(2) accumulation but also of the decrease of O(2) around the face.
Jun Sakai; Shirushi Takahashi; Masato Funayama
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Publication Detail:
Type:  Journal Article     Date:  2009-04-01
Journal Detail:
Title:  Legal medicine (Tokyo, Japan)     Volume:  11 Suppl 1     ISSN:  1873-4162     ISO Abbreviation:  Leg Med (Tokyo)     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-05-26     Completed Date:  2010-01-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100889186     Medline TA:  Leg Med (Tokyo)     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  S406-7     Citation Subset:  IM    
Division of Forensic Medicine, Tohoku University School of Medicine, 2-1 Seiryou-chou, Aoba-ku, Sendai, Japan.
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MeSH Terms
Anoxia / etiology*
Asphyxia / etiology
Bedding and Linens / adverse effects*
Carbon Monoxide / analysis*
Forensic Medicine
Models, Biological*
Prone Position
Regression Analysis
Sudden Infant Death / etiology*
Supine Position
Tidal Volume
Reg. No./Substance:
630-08-0/Carbon Monoxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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