EdenteV2, Main, Exploration, bibRecord, 003061

Predicting efficiency of post-induction mask ventilation based on demographic and anatomical factors

Identifieur interne : 003061 ( Main/Exploration ); précédent : 003060; suivant : 003062

Predicting efficiency of post-induction mask ventilation based on demographic and anatomical factors

Auteurs : Mahmoud Saghaei [Iran] ; Hamid Shetabi [Iran] ; Mohammad Golparvar [Iran]

Source :

Advanced Biomedical Research [ 2277-9175 ] ; 2012.

RBID : PMC:3507007

Abstract

Background:

Failure to ventilate patients by mask leads to serious complications especially if associated with difficult intubation. Previous studies have used subjective and indirect measures to evaluate difficulty in mask ventilation, which are associated with high inter-observer discrepancies. In this study, we have defined and used efficiency of mask ventilation (EMV) as an objective and direct surrogate for ease of mask ventilation in patients undergoing GA and mask ventilation using neuromuscular relaxation.

Materials and Methods:

1050 adult patients prospectively were evaluated with respect to different patients demographic and physical factors and EMV. EMV was defined as the ratio of minute ventilation via anesthesia mask to that via tracheal tube expressed as percentage. Edentolous patients were ventilated using lip-over-mask techniques. Separate analyses were done for edentolous and non-edentolous patients.

Results:

EMV in edentolous patients (n=269) using the lip-over-mask method was relatively high (90.9 ± 14.3%, 60.14–128.57 range). The result of multiple regression analysis in patients with normal denture determined receded chin, presence of beard, male gender, high Mallampati classes, high neck circumference, low inter-incisors gap, and old age as independent factors for estimating EMV. A regression formula for predicting EMV was developed which had an acceptable R-square value with a good model fit.

Conclusions:

Using EMV is an easy and reliable tool for measuring efficiency of mask ventilation. Based on the result of this study, EMV can be estimated from patient's demographic and physical factors. In edentolous patients, using the lip-over-mask method results in adequate ventilation of lungs.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3507007

DOI: 10.4103/2277-9175.96056
PubMed: 23210069
PubMed Central: 3507007

Affiliations:

Iran

Le document en format XML

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<author><name sortKey="Shetabi, Hamid" sort="Shetabi, Hamid" uniqKey="Shetabi H" first="Hamid" last="Shetabi">Hamid Shetabi</name>
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<front><div type="abstract" xml:lang="en"><sec id="st1"><title>Background:</title>
<p>Failure to ventilate patients by mask leads to serious complications especially if associated with difficult intubation. Previous studies have used subjective and indirect measures to evaluate difficulty in mask ventilation, which are associated with high inter-observer discrepancies. In this study, we have defined and used efficiency of mask ventilation (EMV) as an objective and direct surrogate for ease of mask ventilation in patients undergoing GA and mask ventilation using neuromuscular relaxation.</p>
</sec>
<sec id="st2"><title>Materials and Methods:</title>
<p>1050 adult patients prospectively were evaluated with respect to different patients demographic and physical factors and EMV. EMV was defined as the ratio of minute ventilation via anesthesia mask to that via tracheal tube expressed as percentage. Edentolous patients were ventilated using lip-over-mask techniques. Separate analyses were done for edentolous and non-edentolous patients.</p>
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<sec id="st3"><title>Results:</title>
<p>EMV in edentolous patients (<italic>n</italic>
=269) using the lip-over-mask method was relatively high (90.9 ± 14.3%, 60.14–128.57 range). The result of multiple regression analysis in patients with normal denture determined receded chin, presence of beard, male gender, high Mallampati classes, high neck circumference, low inter-incisors gap, and old age as independent factors for estimating EMV. A regression formula for predicting EMV was developed which had an acceptable R-square value with a good model fit.</p>
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<sec id="st4"><title>Conclusions:</title>
<p>Using EMV is an easy and reliable tool for measuring efficiency of mask ventilation. Based on the result of this study, EMV can be estimated from patient's demographic and physical factors. In edentolous patients, using the lip-over-mask method results in adequate ventilation of lungs.</p>
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Serveur d'exploration sur le patient édenté

Predicting efficiency of post-induction mask ventilation based on demographic and anatomical factors

Predicting efficiency of post-induction mask ventilation based on demographic and anatomical factors

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