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Evaluation of carbon dioxide rebreathing during exercise assisted by noninvasive ventilation with plateau exhalation valve

Overview of attention for article published in International Journal of Chronic Obstructive Pulmonary Disease, January 2017
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About this Attention Score

  • Above-average Attention Score compared to outputs of the same age (51st percentile)
  • Average Attention Score compared to outputs of the same age and source

Mentioned by

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2 tweeters

Citations

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10 Dimensions

Readers on

mendeley
31 Mendeley
Title
Evaluation of carbon dioxide rebreathing during exercise assisted by noninvasive ventilation with plateau exhalation valve
Published in
International Journal of Chronic Obstructive Pulmonary Disease, January 2017
DOI 10.2147/copd.s121637
Pubmed ID
Authors

Yong-er Ou, Zhi-min Lin, Dong-ming Hua, Ying Jiang, Ya-ting Huo, Qun Luo, Rong-Chang Chen

Abstract

Noninvasive ventilation with a plateau exhalation valve (PEV) is often used as an adjunct to exercise to achieve a physiologic training effect in severe chronic obstructive pulmonary disease (COPD) patients. However, during exercise, with the increase of exhalation flow and respiratory rate and limited capability of PEV to exhale gases out of the circuit, it is still unknown whether CO2 rebreathing occurs in COPD patients ventilated during exercise assisted by single-limb circuit with a PEV. A maximal symptom-limited cycle exercise test was performed while ventilated on pressure support (inspiratory:expiratory pressure 14:4 cmH2O) in 18 male patients with stable severe COPD (mean ± standard deviation, forced expiratory volume in 1 s: 29.5%±6.9% predicted). At rest and during exercise, breathing pattern, mean expiratory flow, mean expiratory flow of PEV, and the mean inspiratory fraction of CO2 (tidal fractional concentration of inspired CO2 [FiCO2]) reinsufflated from the circuit was measured for each breath. In comparison with rest, with the significant increase of mean expiratory flow (0.39±0.15 vs 0.82±0.27 L/s), fractional concentration of end-tidal CO2 (2.6%±0.7% vs 5.5%±0.6%), and the significant decrease of mean expiratory flow of PEV (0.41±0.02 vs 0.39±0.03 L/s), tidal FiCO2 significantly increased at peak exercise (0.48%±0.19% vs 1.8%±0.6%) in patients with stable severe COPD. The inflection point of obvious CO2 rebreathing was 0.67±0.09 L/s (95% confidence interval 0.60-0.73 L/s). Ventilated by a single-limb tubing with PEV caused CO2 rebreathing to COPD patients during exercise. Patients with mean expiratory flow >0.60-0.73 L/s may be predisposed to a higher risk of CO2 rebreathing.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 31 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Italy 1 3%
Unknown 30 97%

Demographic breakdown

Readers by professional status Count As %
Student > Master 6 19%
Other 5 16%
Student > Doctoral Student 4 13%
Student > Bachelor 3 10%
Professor > Associate Professor 3 10%
Other 6 19%
Unknown 4 13%
Readers by discipline Count As %
Medicine and Dentistry 7 23%
Nursing and Health Professions 5 16%
Sports and Recreations 3 10%
Agricultural and Biological Sciences 1 3%
Social Sciences 1 3%
Other 3 10%
Unknown 11 35%

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 15 May 2020.
All research outputs
#10,251,012
of 17,730,520 outputs
Outputs from International Journal of Chronic Obstructive Pulmonary Disease
#1,040
of 1,998 outputs
Outputs of similar age
#171,167
of 364,732 outputs
Outputs of similar age from International Journal of Chronic Obstructive Pulmonary Disease
#52
of 88 outputs
Altmetric has tracked 17,730,520 research outputs across all sources so far. This one is in the 41st percentile – i.e., 41% of other outputs scored the same or lower than it.
So far Altmetric has tracked 1,998 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.9. This one is in the 47th percentile – i.e., 47% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 364,732 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 51% of its contemporaries.
We're also able to compare this research output to 88 others from the same source and published within six weeks on either side of this one. This one is in the 40th percentile – i.e., 40% of its contemporaries scored the same or lower than it.