Evidence map›Paper›PMID 34435274›Full record

ArticleEuropean journal of applied physiology2021

Physiological effects of mixed-gas deep sea dives using a closed-circuit rebreather: a field pilot study.

Emmanuel Dugrenot, Costantino Balestra, Emmanuel Gouin, Erwan L'Her, François Guerrero

Open access · greenAbstract read
PubMed Publisher
In one paragraph

Article in European journal of applied physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
1.6field-weighted citation impact, top 15% 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, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. A systematic review of HRV during diving in very cold water.International journal of circumpolar health · 2023
    Pooled it
  2. Trial
  3. Article
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  5. Critical flicker fusion frequency: confounders and caveats.European journal of applied physiology · 2026
    Article
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  8. 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

5 authors at 4 institutions in 3 countries.

Emmanuel Dugrenot *TEK diving SAS, F-29200, Brest, France.
Costantino Balestra *Environmental and Occupational Physiology Laboratory, (ISEK), Haute Ecole Bruxelles-Brabant (HE2B), 1160, Brussels, Belgium.
Emmanuel GouinUnder the Pole Expeditions, F-29900, Concarneau, France.
Erwan L'HerMédecine Intensive et Réanimation, CHRU de Brest, Brest, NA, France.
François GuerreroUniv Brest, ORPHY, IBSAM, 6 avenue Le Gorgeu, F-29200, Brest, France. francois.guerrero@univ-brest.fr.ORCID http://orcid.org/0000-0002-0283-3503
Université de Bretagne Occidentale · FRCentre Hospitalier Régional Universitaire de Brest · FRExpedition Technology (United States) · USHaute École de Bruxelles · BE

Funding

Tek Diving SAS. JGP0RV025
6 · The paper itself

Abstract

purposeDeep diving using mixed gas with closed-circuit rebreathers (CCRs) is increasingly common. However, data regarding the effects of these dives are still scarce. This preliminary field study aimed at evaluating the acute effects of deep (90-120 msw) mixed-gas CCR bounce dives on lung function in relation with other physiological parameters.

methodsSeven divers performed a total of sixteen open-sea CCR dives breathing gas mixture of helium, nitrogen and oxygen (trimix) within four days at 2 depths (90 and 120 msw). Spirometric parameters, SpO

resultsThe median [1st-3rd quartile] of the forced vital capacity was lower (84% [76-93] vs 91% [74-107] of predicted values; p = 0.029), whereas FEV1/FVC was higher (98% [95-99] vs 95% [89-99]; p = 0.019) after than before the dives. The other spirometry values and SpO

conclusionThe present observation represents the first original data regarding the effects of deep repeated CCR dives. The body mass loss and decrease of FVC after bounce dives at depth of about 100 msw may possibly impose an important physiological stress for the divers.

Indexed as

HeliumNitrogenOxygenAdultDivingEquipment DesignHeart RateHumansMalePilot ProjectsRespiratory Protective DevicesSpirometryTidal VolumeHeliumNitrogenOxygentrimixClosed circuit rebreatherHeart rate variabilityScubaSpirometry

Identifiers

PMID34435274
OpenAlexW3194987842

What OpenQuestion holds

Textmetadata
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.