Evidence map›Paper›PMID 20701769›Full record

ArticleRespiratory research2010

Effect of acute hypoxia on respiratory muscle fatigue in healthy humans.

Samuel Verges, Damien Bachasson, Bernard Wuyam

Open access · goldAbstract readComparative Study
In one paragraph

Article in Respiratory research, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

30 citing papers in PubMed, 86 citations in OpenAlex.

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  7. Forgotten muscle: diaphragm and sudden infant death syndrome.World journal of pediatrics : WJP · 2026
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  18. Neuromuscular fatigue during whole body exercise.Current opinion in physiology · 2019
    Article
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  20. Review
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

3 authors at 2 institutions in 1 country.

Samuel VergesHP2 laboratory (INSERM ERI17), Joseph Fourier University, Grenoble University Hospital, Grenoble, France. sverges@chu-grenoble.fr
Damien Bachasson
Bernard Wuyam
Centre Hospitalier Universitaire de Grenoble · FRUniversité Joseph Fourier · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGreater diaphragm fatigue has been reported after hypoxic versus normoxic exercise, but whether this is due to increased ventilation and therefore work of breathing or reduced blood oxygenation per se remains unclear. Hence, we assessed the effect of different blood oxygenation level on isolated hyperpnoea-induced inspiratory and expiratory muscle fatigue.

methodsTwelve healthy males performed three 15-min isocapnic hyperpnoea tests (85% of maximum voluntary ventilation with controlled breathing pattern) in normoxic, hypoxic (SpO2 = 80%) and hyperoxic (FiO2 = 0.60) conditions, in a random order. Before, immediately after and 30 min after hyperpnoea, transdiaphragmatic pressure (P(di,tw)) was measured during cervical magnetic stimulation to assess diaphragm contractility, and gastric pressure (P(ga,tw)) was measured during thoracic magnetic stimulation to assess abdominal muscle contractility. Two-way analysis of variance (time x condition) was used to compare hyperpnoea-induced respiratory muscle fatigue between conditions.

resultsHypoxia enhanced hyperpnoea-induced P(di,tw) and P(ga,tw) reductions both immediately after hyperpnoea (P(di,tw) : normoxia -22 +/- 7% vs hypoxia -34 +/- 8% vs hyperoxia -21 +/- 8%; P(ga,tw) : normoxia -17 +/- 7% vs hypoxia -26 +/- 10% vs hyperoxia -16 +/- 11%; all P < 0.05) and after 30 min of recovery (P(di,tw) : normoxia -10 +/- 7% vs hypoxia -16 +/- 8% vs hyperoxia -8 +/- 7%; P(ga,tw) : normoxia -13 +/- 6% vs hypoxia -21 +/- 9% vs hyperoxia -12 +/- 12%; all P < 0.05). No significant difference in (di,tw) or P(ga,tw) reductions was observed between normoxic and hyperoxic conditions. Also, heart rate and blood lactate concentration during hyperpnoea were higher in hypoxia compared to normoxia and hyperoxia.

conclusionsThese results demonstrate that hypoxia exacerbates both diaphragm and abdominal muscle fatigability. These results emphasize the potential role of respiratory muscle fatigue in exercise performance limitation under conditions coupling increased work of breathing and reduced O2 transport as during exercise in altitude or in hypoxemic patients.

Indexed as

Abdominal MusclesAcute DiseaseAdultHumansHypoxiaMaleMuscle FatigueRespiratory Function TestsRespiratory MusclesTime FactorsYoung Adult

Identifiers

PMID20701769
PMCPMC2929221
OpenAlexW2132136387

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.