Evidence map›Paper›PMID 33830815›Full record

ArticleJournal of applied physiology (Bethesda, Md. : 1985)2021

Arterial blood gas measurements during deep open-water breath-hold dives.

Tom Scott, Hanna van Waart, Xavier C E Vrijdag, David Mullins, Peter Mesley, Simon J Mitchell

Open access · greenAbstract read
In one paragraph

Article in Journal of applied physiology (Bethesda, Md. : 1985), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 11% 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

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 22 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Advances in breath-hold diving research: a state-of-the-art review.European journal of applied physiology · 2026
    Review
  4. Trends in competitive freediving accidents.Diving and hyperbaric medicine · 2024
    Article
  5. Cerebral hemodynamic and systemic physiological changes in trained freedivers completing sled-assisted dives to two different depths.American journal of physiology. Regulatory, integrative and comparative physiology · 2024
    Article
  6. Oxy-Inflammation in Humans during Underwater Activities.International journal of molecular sciences · 2024
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. 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

6 authors at 3 institutions in 1 country.

Tom ScottDepartment of Anaesthesia, Auckland City Hospital, Auckland, New Zealand.
Hanna van WaartDepartment of Anaesthesiology, University of Auckland, Auckland, New Zealand.
Xavier C E VrijdagDepartment of Anaesthesiology, University of Auckland, Auckland, New Zealand.
David MullinsFreediving New Zealand, Wellington, New Zealand.
Peter MesleyDive TEC & Lust4Rust Dive Excursions, Auckland, New Zealand.
Simon J MitchellDepartment of Anaesthesia, Auckland City Hospital, Auckland, New Zealand.ORCID 0000-0002-5149-6371
University of Auckland · NZAuckland City Hospital · NZEducation New Zealand · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Arterial blood gas (ABG) measurements at both maximum depth and at resurfacing prior to breathing have not previously been measured during free dives conducted to extreme depth in cold open-water conditions. An elite free diver was instrumented with a left radial arterial cannula connected to two sampling syringes through a low-volume splitting device. He performed two open-water dives to a depth of 60 m (197', 7 atmospheres absolute pressure) in the constant weight with fins competition format. ABG samples were drawn at 60 m (by a mixed-gas scuba diver) and again on resurfacing before breathing. An immersed surface static apnea, of identical length to the dives and with ABG sampling at identical times, was also performed. Both dives lasted approximately 2 min. Arterial partial pressure of oxygen ([Formula: see text]) increased during descent from an indicative baseline of 15.8 kPa (after hyperventilation and glossopharyngeal insufflation) to 42.8 and 33.3 kPa (

Indexed as

DivingWaterBlood Gas AnalysisBreath HoldingHumansMaleOxygenPartial PressureOxygenWaterapneacarbon dioxidefree divingglossopharyngeal insufflationoxygen

Identifiers

PMID33830815
PMCPMC8354821
OpenAlexW3139805316

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.