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Exosurf rescue surfactant improves high ventilation-perfusion mismatch in respiratory distress syndrome.

作者信息

Billman D, Nicks J, Schumacher R

机构信息

Department of Pediatrics, Medical College of Wisconsin, Milwaukee.

出版信息

Pediatr Pulmonol. 1994 Nov;18(5):279-83. doi: 10.1002/ppul.1950180503.

DOI:10.1002/ppul.1950180503
PMID:7898965
Abstract

OBJECTIVE

To assess ventilation/perfusion (VA/Q) mismatch of the high type, following rescue surfactant therapy for respiratory distress syndrome.

HYPOTHESIS

Surfactant therapy reduces such mismatch.

DESIGN

Randomized, double-blind, placebo-controlled study, assessing VA/Q with the arterial-alveolar difference of CO2 tension (P(a-A)CO2). This difference was determined with capnometry and arterial blood gases, using the equation: P(a-A)CO2 equals arterial CO2 minus alveolar CO2 partial pressure.

SETTING

A level III nursery.

PATIENTS

Ten intubated infants with respiratory distress syndrome.

INTERVENTION

Infants were randomized to each receive two doses of surfactant or two doses of air placebo.

RESULTS

P(a-A)CO2 improved after surfactant and worsened after placebo (P = 0.0021), comparing slopes of 12-hr regression lines. A similar pattern occurred with oxygenation. These changes in P(a-A)CO2 and in oxygenation were minimally correlated within the surfactant group.

CONCLUSION

Exosurf rescue surfactant reduced VA/Q mismatch of the high type, over several hours.

摘要

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