EdenteV2, Main, Exploration, bibRecord, 002184

Techniques of preoxygenation in patients with ineffective face mask seal

Identifieur interne : 002184 ( Main/Exploration ); précédent : 002183; suivant : 002185

Techniques of preoxygenation in patients with ineffective face mask seal

Auteurs : Pankaj Kundra [Inde] ; Shirley Stephen [Inde] ; Stalin Vinayagam [Inde]

Source :

Indian Journal of Anaesthesia [ 0019-5049 ] ; 2013.

RBID : PMC:3696266

Abstract

Background:

Ineffective face mask seal is the most common cause for suboptimal pre-oxygenation. Room air entrainment can be more with vital capacity (VC) breaths when the mask is not a tight fit.

Aims:

This study was designed to compare 5 min tidal volume (TV) breathing and eight VC breaths in patients with ineffective face mask seal.

Methods:

Twenty eight ASA I adults with ineffective face mask seal were randomized to breathe 100% oxygen at normal TV for 5 min (Group TV) and eight VC breaths (Group VC) in a cross over manner through circle system at 10 L/min. End tidal oxygen concentration (EtO₂) and arterial blood gas analysis was performed to evaluate oxygenation with each technique.

Statistical and Analysis:

Data were analysed using SPSS statistical software, version 16. Friedman's two-way analysis of variance by ranks was used for non-parametric data.

Results:

Significant increase in EtO₂ (median 90) and PaO₂ (228.85) was seen in group TV when compared to group VC (EtO₂ median 85, PaO₂ 147.65), P<0.05. Mean total ventilation volume in 1 min in group VC was 9.4±3.3 L/min and more than fresh gas flow (10 L/min) in seven patients. In group TV, the fresh gas flow (50 L/5 min) was sufficient at normal TV (mean total ventilation in 5 min 36.7±6.3 L/min).

Conclusions:

TV breathing for 5 min provides better pre-oxygenation in patients with ineffective mask seal with fresh gas flow of 10 L/min delivered through a circle system.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3696266

DOI: 10.4103/0019-5049.111847
PubMed: 23825818
PubMed Central: 3696266

Affiliations:

Inde

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<author><name sortKey="Kundra, Pankaj" sort="Kundra, Pankaj" uniqKey="Kundra P" first="Pankaj" last="Kundra">Pankaj Kundra</name>
<affiliation wicri:level="1"><nlm:aff id="aff1">Department of Anaesthesiology and Critical Care, Jawaharlal Institute of Postgraduate Medical Education and Research Centre, Pondicherry, India</nlm:aff>
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<author><name sortKey="Stephen, Shirley" sort="Stephen, Shirley" uniqKey="Stephen S" first="Shirley" last="Stephen">Shirley Stephen</name>
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<series><title level="j">Indian Journal of Anaesthesia</title>
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<front><div type="abstract" xml:lang="en"><sec id="st1"><title>Background:</title>
<p>Ineffective face mask seal is the most common cause for suboptimal pre-oxygenation. Room air entrainment can be more with vital capacity (VC) breaths when the mask is not a tight fit.</p>
</sec>
<sec id="st2"><title>Aims:</title>
<p>This study was designed to compare 5 min tidal volume (TV) breathing and eight VC breaths in patients with ineffective face mask seal.</p>
</sec>
<sec id="st3"><title>Methods:</title>
<p>Twenty eight ASA I adults with ineffective face mask seal were randomized to breathe 100% oxygen at normal TV for 5 min (Group TV) and eight VC breaths (Group VC) in a cross over manner through circle system at 10 L/min. End tidal oxygen concentration (EtO<sub>2</sub>
) and arterial blood gas analysis was performed to evaluate oxygenation with each technique.</p>
</sec>
<sec id="st4"><title>Statistical and Analysis:</title>
<p>Data were analysed using SPSS statistical software, version 16. Friedman's two-way analysis of variance by ranks was used for non-parametric data.</p>
</sec>
<sec id="st5"><title>Results:</title>
<p>Significant increase in EtO<sub>2</sub>
 (median 90) and PaO<sub>2</sub>
 (228.85) was seen in group TV when compared to group VC (EtO<sub>2</sub>
 median 85, PaO<sub>2</sub>
 147.65), <italic>P</italic>
<0.05. Mean total ventilation volume in 1 min in group VC was 9.4±3.3 L/min and more than fresh gas flow (10 L/min) in seven patients. In group TV, the fresh gas flow (50 L/5 min) was sufficient at normal TV (mean total ventilation in 5 min 36.7±6.3 L/min).</p>
</sec>
<sec id="st6"><title>Conclusions:</title>
<p>TV breathing for 5 min provides better pre-oxygenation in patients with ineffective mask seal with fresh gas flow of 10 L/min delivered through a circle system.</p>
</sec>
</div>
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Serveur d'exploration sur le patient édenté

Techniques of preoxygenation in patients with ineffective face mask seal

Techniques of preoxygenation in patients with ineffective face mask seal

Source :

Abstract

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