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Professor Malin Malmsjö, MD, PhD. Photo.

Malin Malmsjö

Professor

Professor Malin Malmsjö, MD, PhD. Photo.

Particle flow rate from the airways as fingerprint diagnostics in mechanical ventilation in the intensive care unit : A randomised controlled study

Author

  • Filip Hallgren
  • Martin Stenlo
  • Anna Niroomand
  • Ellen Broberg
  • Snejana Hyllén
  • Malin Malmsjö
  • Sandra Lindstedt

Summary, in English

Introduction Mechanical ventilation can be monitored by analysing particles in exhaled air as measured by particle flow rate (PFR). This could be a potential method of detecting ventilator-induced lung injury (VILI) before changes in conventional parameters can be detected. The aim of this study was to investigate PFR during different ventilation modes in patients without lung pathology. Method A prospective study was conducted on patients on mechanical ventilation in the cardiothoracic intensive care unit (ICU). A PExA 2.0 device was connected to the expiratory limb on the ventilator for continuous measurement of PFR in 30 patients randomised to either volume-controlled ventilation (VCV) or pressure-controlled ventilation (PCV) for 30 min including a recruitment manoeuvre. PFR measurements were continued as the patients were transitioned to pressure-regulated volume control (PRVC) and then pressure support ventilation (PSV) until extubation. Results PRVC resulted in significantly lower PFR, while those on PSV had the highest PFR. The distribution of particles differed significantly between the different ventilation modes. Conclusions Measuring PFR is safe after cardiac surgery in the ICU and may constitute a novel method of continuously monitoring the small airways in real time. A low PFR during mechanical ventilation may correlate to a gentle ventilation strategy. PFR increases as the patient transitions from controlled mechanical ventilation to autonomous breathing, which most likely occurs as recruitment by the diaphragm opens up more distal airways. Different ventilation modes resulted in unique particle patterns and could be used as a fingerprint for the different ventilation modes.

Department/s

  • StemTherapy: National Initiative on Stem Cells for Regenerative Therapy
  • Anesthesiology and Intensive Care
  • Thoracic Surgery
  • Pediatric anesthesia and intensive care
  • Clinical and experimental lung transplantation
  • Ophthalmology, Lund
  • Ophthalmology Imaging Research Group
  • NPWT technology
  • WCMM-Wallenberg Centre for Molecular Medicine
  • Lung Bioengineering and Regeneration
  • DCD transplantation of lungs

Publishing year

2021-07-01

Language

English

Publication/Series

ERJ open research

Volume

7

Issue

3

Document type

Journal article

Publisher

European Respiratory Society

Topic

  • Anesthesiology and Intensive Care

Status

Published

Research group

  • Pediatric anesthesia and intensive care
  • Clinical and experimental lung transplantation
  • Ophthalmology Imaging Research Group
  • NPWT technology
  • Lung Bioengineering and Regeneration
  • DCD transplantation of lungs

ISBN/ISSN/Other

  • ISSN: 2312-0541