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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
5
|
pubmed:dateCreated |
1984-12-14
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pubmed:abstractText |
We have compared the cardiorespiratory effects of an inspiratory: expiratory (I:E) ratio of 4:1 with a ratio of 1:2 in 10 adult patients requiring intermittent positive pressure ventilation (IPPV) for acute respiratory insufficiency. Further comparisons were made with IPPV with positive end-expiratory pressure (PEEP) which was adjusted to achieve an equal external end-expiratory volume (EEEV) to that produced by the 4:1 ratio, as determined by respiratory inductive plethysmography, and with an I:E ratio that only changed the EEEV minimally (IRV-min). Percentage pulmonary shunt (Qs/Qt) was reduced equally with PEEP and with the 4:1 I:E ratio but both patterns reduced cardiac output and oxygen delivery. IRV-min also reduced Qs/Qt significantly but had no effect on cardiac output so that oxygen delivery was increased. The dead space to tidal volume ratio (VD/VT) during IPPV-4:1 and IRV-min was reduced significantly when compared with that during IPPV-1:2. The clinical implications of the findings suggest that for some ITU patients, a modest increase in I:E ratio to between 1.1:1 and 1.7:1 may produce better gas exchange without significantly effecting the cardiac output.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:status |
MEDLINE
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pubmed:issn |
0342-4642
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
10
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pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
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pubmed:pagination |
227-32
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:6386921-Adult,
pubmed-meshheading:6386921-Forced Expiratory Volume,
pubmed-meshheading:6386921-Functional Residual Capacity,
pubmed-meshheading:6386921-Humans,
pubmed-meshheading:6386921-Intermittent Positive-Pressure Ventilation,
pubmed-meshheading:6386921-Positive-Pressure Respiration,
pubmed-meshheading:6386921-Pulmonary Circulation,
pubmed-meshheading:6386921-Respiratory Insufficiency
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pubmed:year |
1984
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pubmed:articleTitle |
Inverse ratio ventilation compared with PEEP in adult respiratory failure.
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pubmed:publicationType |
Journal Article,
Comparative Study
|