Seven-day in vivo testing of a novel, low-resistance, pumpless pediatric artificial lung for long-term support

For children with end-stage lung disease that cannot wean from extracorporeal life support (ECLS), a wearable artificial lung would permit extubation and provide a bridge to recovery or transplantation. We evaluate the function of the novel Pediatric MLung—a low-resistance, pumpless artificial lung...

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Bibliographic Details
Published in:Journal of pediatric surgery 2022-11, Vol.57 (11), p.614-623
Main Authors: Fallon, Brian P, Thompson, Alex J, Prater, Aaron R, Buchan, Skylar, Alberts, Trevor, Hoenerhoff, Mark, Rojas-Pena, Alvaro, Bartlett, Robert H, Hirschl, Ronald B
Format: Article
Language:English
Subjects:
Animals
Artificial lung
Artificial Organs
Child
ECLS
End-stage lung disease
Extracorporeal Membrane Oxygenation
Hemoglobins
Humans
Lung
Lung transplantation
Oxygen
Pediatric
Pulmonary hypertension
Sheep
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Summary:For children with end-stage lung disease that cannot wean from extracorporeal life support (ECLS), a wearable artificial lung would permit extubation and provide a bridge to recovery or transplantation. We evaluate the function of the novel Pediatric MLung—a low-resistance, pumpless artificial lung developed specifically for children—in healthy animal subjects. Adolescent “mini sheep” weighing 12–20 kg underwent left thoracotomy, cannulation of the main pulmonary artery (PA; inflow) and left atrium (outflow), and connection to the MLung. Thirteen sheep were studied; 6 were supported for 7 days. Mean PA pressure was 23.9 ± 6.9 mmHg. MLung blood flow was 633±258 mL/min or 30.0 ± 16.0% of CO. MLung pressure drop was 4.4 ± 3.4 mmHg. Resistance was 7.2 ± 5.2 mmHg/L/min. Device outlet oxygen saturation was 99.0 ± 3.3% with inlet saturation 53.8 ± 7.3%. Oxygen delivery was 41.1 ± 18.4 mL O2/min (maximum 84.9 mL/min) or 2.8 ± 1.5 mL O2/min/kg. Platelet count significantly decreased; no platelet transfusions were required. Plasma free hemoglobin significantly increased only on day 7, at which point 2 of the animals had plasma free hemoglobin levels above 50 mg/dL. The MLung provides adequate gas exchange at appropriate blood flows for the pediatric population in a PA-to-LA configuration. Further work remains to improve the biocompatibility of the device. N/A
ISSN:0022-3468
1531-5037
DOI:10.1016/j.jpedsurg.2022.07.006