Central venoarterial extracorporeal life support in pediatric refractory septic shock: a single center experience

Abstract

Objective:

Venoarterial extracorporeal membrane oxygenation (VA ECMO) is recognized as a potential support therapy for pediatric patients with refractory septic shock (RSS). This review aims to report our experience with central VA cannulation in pediatric patients with RSS, and to compare this with peripheral VA ECMO cannulations for this condition at our institution.

Design:

Retrospective case series.

Setting:

Pediatric and cardiac intensive care units in an academic pediatric hospital.

Patients:

All patients 0–18 years old meeting criteria of RSS placed on VA ECMO between January 2011 and December 2018.

Interventions:

None.

Measurements:

Demographics, relevant clinical variables, ECMO run details, and outcomes were collected.

Results:

Between 2011 and 2018, 14 children were placed on VA ECMO for RSS. Nine were cannulated centrally, with the rest placed on peripheral VA ECMO. Overall survival to hospital discharge was 57.1% (8/14), with 66.7% of the central cannulation cohort surviving versus 40% in the peripheral cannulation (p = 0.34). Median ECMO duration was 147.1 hours (IQR: 91.9–178.6 hours), with survivors having a median length of 147.1 (IQR: 138.5–185.7) versus non survivors 114.7 hours (IQR: 63.7–163.5), p = 0.48. Overall median ICU length of stay (LOS) was 19 days (IQR: 10.5–42.2). The median % maximum flow achieved on VA ECMO was higher in the central cannulation group at 179.6% (IQR: 154.4–188.1) versus the peripheral with 133.5% (98.1–149.1), p = 0.01. Functional status scale (FSS) was used to capture morbidity. All survivors had a mean increase in their FSS from baseline. In the centrally cannulated group, 50% (4/8) received mediastinal exploration, but none developed mediastinitis. In terms of blood product utilization, the central cannulation received more platelets compared to the peripherally cannulated group (median 15.6 vs 3.3 mL/kg/day, p = 0.03).

Conclusion:

A central approach to VA ECMO cannulation is feasible and has potential for good patient outcomes in selected patients.

Keywords

pediatric refractory septic shock pediatric extracorporeal membrane oxygenation central cannulation

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