Evidence map›Paper›PMID 31634232›Full record

ArticleCritical care medicine2020

High-Frequency Oscillatory Ventilation and Ventilator-Induced Lung Injury: Size Does Matter.

Jacob Herrmann, Weerapong Lilitwat, Merryn H Tawhai, David W Kaczka

Open access · greenAbstract readComparative Study
In one paragraph

Article in Critical care medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
2.1field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.

  1. Pooled it
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  7. Unshrinking the baby lung to calm the VILI vortex.Critical care (London, England) · 2022
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 2 countries.

Jacob HerrmannDepartment of Biomedical Engineering, University of Iowa, Iowa City, IA.
Weerapong LilitwatDepartment of Pediatrics, University of Iowa Hospitals and Clinics, Iowa City, IA.
Merryn H TawhaiAuckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.
David W KaczkaDepartment of Biomedical Engineering, University of Iowa, Iowa City, IA.
University of Iowa Hospitals and Clinics · USUniversity of Auckland · NZ

Funding

Multi-center Structural & Functional Quantitative CT Pulmonary PhenotypingR01HL112986 · NHLBI · UNIVERSITY OF IOWA · PI HOFFMAN, ERIC ALFRED · 2012 to 2016
$4.6M
Defining the role of early pulmonary vascular disease in COPDR01HL126838 · NHLBI · UNIVERSITY OF IOWA · PI HAN, MEILAN K, HOFFMAN, ERIC ALFRED · 2015 to 2018
$3.1M
NHLBI NIH HHS R01 HL112986NHLBI NIH HHS R01 HL126838
6 · The paper itself

Abstract

objectivesThe theoretical basis for minimizing tidal volume during high-frequency oscillatory ventilation may not be appropriate when lung tissue stretch occurs heterogeneously and/or rapidly. The objective of this study was to assess the extent to which increased ventilation heterogeneity may contribute to ventilator-induced lung injury during high-frequency oscillatory ventilation in adults compared with neonates on the basis of lung size, using a computational model of human lungs.

designComputational modeling study.

settingResearch laboratory. SUBJECTS: High-fidelity, 3D computational models of human lungs, scaled to various sizes representative of neonates, children, and adults, with varying injury severity. All models were generated from one thoracic CT image of a healthy adult male.

interventionsOscillatory ventilation was simulated in each lung model at frequencies ranging from 0.2 to 40 Hz. Sinusoidal flow oscillations were delivered at the airway opening of each model and distributed through the lungs according to regional parenchymal mechanics. MEASUREMENTS AND MAIN

resultsAcinar flow heterogeneity was assessed by the coefficient of variation in flow magnitudes across all acini in each model. High-frequency oscillatory ventilation simulations demonstrated increasing heterogeneity of regional parenchymal flow with increasing lung size, with decreasing ratio of deadspace to total acinar volume, and with increasing frequency above lung corner frequency and resonant frequency. Potential for resonant amplification was greatest in injured adult-sized lungs with higher regional quality factors indicating the presence of underdamped lung regions.

conclusionsThe potential for ventilator-induced lung injury during high-frequency oscillatory ventilation is enhanced at frequencies above lung corner frequency or resonant frequency despite reduced tidal volumes, especially in adults, due to regional amplification of heterogeneous flow. Measurements of corner frequency and resonant frequency should be considered during high-frequency oscillatory ventilation management.

Indexed as

AdultChildComputer SimulationHigh-Frequency VentilationHumansInfant, NewbornLungOrgan SizeVentilator-Induced Lung Injury

Identifiers

PMID31634232
PMCPMC8500675
OpenAlexW2980423713

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.