ArticleInternational journal of chronic obstructive pulmonary disease2018
The Efficiency Index (EFFi), based on volumetric capnography, may allow for simple diagnosis and grading of COPD.
Article in International journal of chronic obstructive pulmonary disease, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04814797 (The Study of Capnography for the Follow-up of Cystic Fibrosis Children With or Without Gas Trapping), which is not on this map. Cited by 4 papers.
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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.
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.
The Study of Capnography for the Follow-up of Cystic Fibrosis Children With or Without Gas Trapping
Who cites it
4 citing papers in PubMed.
- Development and preliminary tests of a portable volumetric capnograph for outpatient use.Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia · 2025Article
- Prediction of Pulmonary Function Parameters Based on a Combination Algorithm.Bioengineering (Basel, Switzerland) · 2022Article
- Use of capnography for prediction of obstruction severity in non-intubated COPD and asthma patients.Respiratory research · 2021Observational
- Predictors of impaired pulmonary function in people living with HIV in an urban African setting.Southern African journal of HIV medicine · 2021Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Spirometry, the main tool for diagnosis and follow-up of COPD, incompletely describes the disease. Based on volumetric capnography (VCap), an index was developed for the diagnosis and grading of COPD, aimed as a complement or alternative to spirometry. Methods: Nine non-smokers, 10 smokers/former smokers without COPD and 54 smokers/former smokers with COPD were included in the study. Multiple breath washout of N Results: EFFi increased with increased Global initiative for chronic Obstructive Lung Disease (GOLD) stage and the majority of subjects in GOLD 2 and all subjects in GOLD 3 and 4 could be diagnosed as having COPD using the lower 95% confidence interval of the healthy group. EFFi also correlated with N Conclusion: EFFi measures efficiency of tidal CO
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