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. 2025 Jul;40(5):1267-1276.
doi: 10.1177/02676591241293673. Epub 2024 Oct 18.

Short-term neurologic outcomes in pediatric extracorporeal membrane oxygenation are proportional to bleeding severity graded by a novel bleeding scale

Affiliations

Short-term neurologic outcomes in pediatric extracorporeal membrane oxygenation are proportional to bleeding severity graded by a novel bleeding scale

Katherine Doane et al. Perfusion. 2025 Jul.

Abstract

IntroductionThis study aimed to characterize the severity of bleeding and its association with short-term neurologic outcomes in pediatric ECMO.MethodsMulticenter retrospective cohort study of pediatric ECMO patients at 10 centers utilizing the Pediatric ECMO Outcomes Registry (PEDECOR) database from December 2013-February 2019. Subjects excluded were post-cardiac surgery patients and those with neonatal pathologies. A novel ECMO bleeding scale was utilized to categorize daily bleeding events. Poor short-term neurologic outcome was defined as an unfavorable Pediatric Cerebral Performance Category (PCPC) or Pediatric Overall Performance Category (POPC) (score of >3) at hospital discharge.ResultsThis study included 283 pediatric ECMO patients with a median (interquartile range [IQR]) age of 1.3 years [0.1, 9.0], ECMO duration of 5 days [3.0, 9.5], and 44.1% mortality. Unfavorable PCPC and POPC were observed in 48.4% and 51.3% of patients at discharge, respectively. Multivariable logistic regression analysis included patient's age, cannulation type, duration of ECMO, need for cardiopulmonary resuscitation, acute kidney injury, new infection, and vasoactive-inotropic score. As the severity of bleeding increased, there was a corresponding increase in the likelihood of poor neurologic recovery, shown by increasing odds of unfavorable neurologic outcome (PCPC), with an adjusted odds ratio (aOR) of 0.77 (confidence interval [CI] 0.36-1.62), 1.87 (0.54-6.45), 2.97 (1.32-6.69), and 5.56 (0.59-52.25) for increasing bleeding severity (grade 1 to 4 events, respectively). Similarly, unfavorable POPC aOR (CI) was 1.02 (0.48-2.17), 2.05 (0.63-6.70), 5.29 (2.12-13.23), and 5.11 (0.66-39.64) for bleeding grade 1 to 4 events.ConclusionShort-term neurologic outcomes in pediatric ECMO are proportional to the severity of bleeding events. Strategies to mitigate bleeding events could improve neurologic recovery in pediatric ECMO.

Keywords: anticoagulation; child; extracorporeal membrane oxygenation; hemorrhage; mortality; outcome.

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Conflict of interest statement

Declaration of conflicting interestsThe author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: Jun Teruya: Evaheart member of DSMB and STAGO honoraria for presentation: Ahmed Said: supported by the Children’s Discovery Institute Faculty Development Award at Washington University in St. Louis: Marie Steiner: Teaching contract (managing coagulation) with Medtronic and study advisory board for Octapharma (AT in Adult CPB heparin resistance). All other authors report no conflicts of interest.

Figures

Figure 1.
Figure 1.
Of all severe and catastrophic bleeding events, nearly half (42.6%) of the events were preceded by either mild (16.4%) or moderate (26.2%) clinical bleeding events 24 h prior to the severe or catastrophic bleeding event.
Figure 2.
Figure 2.
The proportion of patients with unfavorable PCPC, unfavorable POPC, and in-hospital mortality increased with maximum bleeding severity during the ECMO course.
Figure 3.
Figure 3.
In multivariable logistic regression, severity of bleeding events categorized by the TCH ECMO Bleeding Scale increased with the likelihood of in-hospital mortality and unfavorable PCPC and POPC at discharge in children requiring ECMO. PCPC: pediatric cerebral performance category; POPC: pediatric overall performance category; Yr: years of age; CPR: cardiopulmonary resuscitation; VIS: vasoactive inotrope score; OI: oxygenation index.

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