Evidence map›Paper›PMID 33344627›Full record

ArticleERJ open research2020

Oscillometry and computed tomography findings in patients with idiopathic pulmonary fibrosis.

Yuji Yamamoto, Keisuke Miki, Kazuyuki Tsujino, Tomoki Kuge, Fukuko Okabe, Takahiro Kawasaki, Takanori Matsuki, Hiroyuki Kagawa, Mari Miki, Hiroshi Kida

Open access · goldAbstract read
In one paragraph

Article in ERJ open research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
0.9field-weighted citation impact, top 22% 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

12 citing papers in PubMed, 15 citations in OpenAlex.

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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

10 authors at 1 institution in 1 country.

Yuji YamamotoDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.ORCID https://orcid.org/0000-0002-5489-5079
Keisuke MikiDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Kazuyuki TsujinoDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Tomoki KugeDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Fukuko OkabeDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Takahiro KawasakiDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Takanori MatsukiDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Hiroyuki KagawaDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Mari MikiDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.
Hiroshi KidaDept of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka, Japan.ORCID https://orcid.org/0000-0002-9351-7855
Toneyama National Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although the utility of oscillometry for predicting disease severity in idiopathic pulmonary fibrosis (IPF) had been researched, little has been reported on the mechanism of why respiratory impedance reflects disease severity. In addition, traction bronchiectasis has been considered to reduce respiratory resistance and correlate negatively with airflow obstruction, but this hypothesis has not been validated. The present study aimed to investigate the correlations between oscillometric parameters and fibrosis-related lung abnormalities in IPF and to assess the utility of oscillometry as a surrogate marker for traction bronchiectasis and airflow obstruction. Eighty Japanese patients with IPF underwent high-resolution computed tomography (HRCT), spirometry, and oscillometry and were retrospectively investigated. Fibrosis-related HRCT findings were scored regarding airspace consolidation, honeycombing, architectural distortion, traction bronchiectasis, and fibrosis. Correlations between the HRCT scores, spirometric parameters, and oscillometric parameters were analysed. Respiratory reactance correlated positively with all fibrosis-related HRCT scores. Vital capacity and forced vital capacity (FVC) correlated negatively with oscillometric parameters and HRCT scores, reflecting the severity of restrictive ventilatory deficiency. Respiratory resistance was not related to any of the HRCT scores or forced expiratory volume in 1 s/FVC. However, forced expiratory volume in 1 s/FVC correlated positively with HRCT scores, which showed that airflow obstruction became milder as the disease progressed. In conclusion, respiratory reactance reflects fibrosis and restrictive ventilatory deficiency in IPF. Moreover, respiratory resistance is independent of traction bronchiectasis and airflow obstruction in patients with IPF, which implies that respiratory resistance might reflect different properties of the airways.

Identifiers

PMID33344627
PMCPMC7737428
OpenAlexW3091906241

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Registered trials

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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.