Evidence map›Paper›PMID 29299780›Full record

ArticleSports medicine - open2018

The Key Roles of Negative Pressure Breathing and Exercise in the Development of Interstitial Pulmonary Edema in Professional Male SCUBA Divers.

Olivier Castagna, Jacques Regnard, Emmanuel Gempp, Pierre Louge, François Xavier Brocq, Bruno Schmid, Anne-Virginie Desruelle, Valentin Crunel, Adrien Maurin, Romain Chopard and 1 more

Open access · goldAbstract read
In one paragraph

Article in Sports medicine - open, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 13% 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 47 citations in OpenAlex.

  1. Guideline
  2. Article
  3. Article
  4. Article
  5. Article
  6. Snorkelling and Breath-Hold Diving Fatalities in Australia-A Review of 317 Deaths.International journal of environmental research and public health · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Oxygen uptake (Frontiers in physiology · 2023
    Article
  11. Review
  12. Article
  13. Observational
  14. Observational
  15. Article
  16. Article
  17. Article
  18. Article
  19. 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

11 authors at 6 institutions in 2 countries.

Olivier CastagnaUnderwater Research Team (ERRSO) from the Military Biomedical Research Institute (IRBA), Toulon, France.
Jacques RegnardEA3920, University Bourgogne Franche-Comté and University Hospitals, Besançon, France.
Emmanuel GemppFrench Navy Diving School, Toulon, France.
Pierre LougeDepartment of Hyperbaric Medicine, HIA St Anne Military Hospital, Toulon, France.
François Xavier BrocqDepartment of Cardiology, HIA St Anne Military Hospital, Toulon, France.
Bruno SchmidUnderwater Research Team (ERRSO) from the Military Biomedical Research Institute (IRBA), Toulon, France.
Anne-Virginie DesruelleUnderwater Research Team (ERRSO) from the Military Biomedical Research Institute (IRBA), Toulon, France.
Valentin CrunelUnderwater Research Team (ERRSO) from the Military Biomedical Research Institute (IRBA), Toulon, France.
Adrien MaurinUnderwater Research Team (ERRSO) from the Military Biomedical Research Institute (IRBA), Toulon, France.
Romain ChopardDepartment of Cardiology EA3920, Franche Comté University and University Hospital, Besançon, France.
David Hunter MacIverBiological Physics Group, University of Manchester, Manchester, UK. david.maciver@tst.nhs.uk.ORCID http://orcid.org/0000-0002-5139-9029
Hôpital d'Instruction des Armées Sainte-Anne · FRLaboratoire Motricité Humaine Éducation Sport Santé · FRMarine nationaleMusgrove Park Hospital · GBUniversité Bourgogne Franche-Comté · FRUniversité de franche-comté · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundImmersion pulmonary edema is potentially a catastrophic condition; however, the pathophysiological mechanisms are ill-defined. This study assessed the individual and combined effects of exertion and negative pressure breathing on the cardiovascular system during the development of pulmonary edema in SCUBA divers.

methodsSixteen male professional SCUBA divers performed four SCUBA dives in a freshwater pool at 1 m depth while breathing air at either a positive or negative pressure both at rest or with exercise. Echocardiography and lung ultrasound were used to assess the cardiovascular changes and lung comet score (a measure of interstitial pulmonary edema).

resultsThe ultrasound lung comet score was 0 following both the dives at rest regardless of breathing pressure. Following exercise, the mean comet score rose to 4.2 with positive pressure breathing and increased to 15.1 with negative pressure breathing. The development of interstitial pulmonary edema was significantly related to inferior vena cava diameter, right atrial area, tricuspid annular plane systolic excursion, right ventricular fractional area change, and pulmonary artery pressure. Exercise combined with negative pressure breathing induced the greatest changes in these cardiovascular indices and lung comet score.

conclusionsA diver using negative pressure breathing while exercising is at greatest risk of developing interstitial pulmonary edema. The development of immersion pulmonary edema is closely related to hemodynamic changes in the right but not the left ventricle. Our findings have important implications for divers and understanding the mechanisms of pulmonary edema in other clinical settings.

Indexed as

Atrial natriuretic peptideEchocardiographyExerciseHydrostatic transrespiratory pressureImmersion pulmonary edemaInspiratory breathing effortLung ultrasonographyNegative pressure breathingRight heart preloadWork of breathing

Identifiers

PMID29299780
PMCPMC5752643
OpenAlexW2782316791

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.