Objectives: To determine if indices of alveolar gas exchange preextubation predict postextubation respiratory support needs as well as the need for escalation of therapies following infant cardiac surgery.

Design: Retrospective chart review.

Setting: Pediatric cardiac ICU in a quaternary-care teaching hospital.

Patients: Infants less than 1 year old who underwent biventricular repair from January 2015 to December 2017.

Interventions: None.

Measurements And Main Results: Preextubation alveolar-arterial gradient, oxygenation index, oxygen saturation index, Pao/Fio ratio, and dead space ventilation (analyzed with both end-tidal carbon dioxide gradient and dead space fraction) were evaluated for each patient. All but dead space ventilation were associated with a higher level of noninvasive respiratory support immediately postextubation. Furthermore, impaired preextubation gas exchange was independently associated with escalation of respiratory support within the first 48-hour postextubation.

Conclusions: Validated measures of alveolar gas exchange can be used as a tool to assess postextubation respiratory support needs including the risk of escalation of respiratory support in the first 48-hour postextubation. Prospective study with implementation of extubation guidelines, both for readiness and determination of early postextubation support, is needed to validate these findings.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9061152PMC
http://dx.doi.org/10.1097/CCE.0000000000000681DOI Listing

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