Publication Date

1-2013

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Abstract

Background: BNP is a hormone released from the cardiac ventricles in response to increased pressure and volume overload1 and is an important biomarker in heart failure. Following congenital heart surgery, elevated BNP levels correlate with longer duration of mechanical ventilation, low cardiac output syndrome, and increased ICU length of stay2-4 Mechanical ventilation (MV) has an exaggerated impact on cardiopulmonary interactions in children with myocardial dysfunction, and extubation readiness can be difficult to determine post-operatively following congenital heart surgery.

Hypothesis: An increase in post-extubation BNP levels can predict extubation failure and the need for reintubation within 48 hours.

Methods:

Design: prospective, observational, blinded pilot Participants: Infants ≤ 30 days of age with RACHS-15 score ≥3 admitted to the PICU following congenital heart surgery

Measurements: BNP levels were obtained on full MV just prior to weaning per standardized weaning protocol, one hour following a pressure support trial (PST), and at 2, 6, and 12 hours following extubation. Inotropic scores6 were calculated at each interval.

Conclusions:

1.Patients who failed extubation had a trend towards higher BNP levels compared to those who did not fail extubation

2.BNP levels increased in all patients with MV weaning and following extubation

3.Inotropic scores did not correlate with BNP values

Disciplines

Critical Care | Pediatrics

Notes

Presented at the Society of Critical Care Medicine Annual Congress. San Juan, PR. January 2013.

B-type Natriuretic Peptide (BNP):  A Potential Biomarker for Extubation Failure in Infants Following Cardiac Surgery

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