Systems for automatic oxygen dosing during artificial lung ventilation

Czech version

Authors: P. Kudrna ^1,2; L. Tejkl ²
Authors‘ workplace: Klinika gynekologie, porodnictví a neonatologie, 1. LF UK a VFN, Praha ¹; Katedra biomedicínské techniky, Fakulta biomedicínského inženýrství ČVUT, Praha ²
Published in: Čes-slov Neonat 2023; 29 (2): 121-124.
Category: Contributions on respiratory problems of preterm newborns

Overview

Modern technology has made it possible to automatically control the oxygen levels in the ventilation mixture provided to patients. The concentration of inspired oxygen can be regulated based on real-time information from the pulse oximeter built into the lung ventilator. This feedback control is called automatic closed loop, which requires an electronically controlled gas mixer. Blood oxygen saturation is measured using Masimo or Nellcor pulse oximetry technology.

The paper provides further details on the types of automatic closed loop control algorithms and the clinically available technologies. Studies have shown that automatic closed loop systems more efficiently maintain normal blood oxygen levels than manual fraction of inspired oxygen adjustment. While automatic closed loop systems can quickly resolve hypoxemic episodes, they cannot prevent them entirely.

Keywords:

oxygen fraction, feedback, automatic oxygen regulation, patient in the loop, lung ventilation

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