Evidence map›Paper›PMID 26285143›Full record

ArticlePloS one2015

Effect of Maximal Apnoea Easy-Going and Struggle Phases on Subarachnoid Width and Pial Artery Pulsation in Elite Breath-Hold Divers.

Pawel J Winklewski, Otto Barak, Dennis Madden, Agnieszka Gruszecka, Marcin Gruszecki, Wojciech Guminski, Jacek Kot, Andrzej F Frydrychowski, Ivan Drvis, Zeljko Dujic

Open access · goldAbstract readComparative Study
PubMed Full text at PMC Publisher
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

8 citing papers in PubMed, 14 citations in OpenAlex.

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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

10 authors at 5 institutions in 3 countries.

Pawel J WinklewskiInstitute of Human Physiology, Medical University of Gdansk, Gdansk, Poland.
Otto BarakFaculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
Dennis MaddenDepartment of Integrative Physiology, University of Split School of Medicine, Split, Croatia.
Agnieszka GruszeckaDepartment of Radiology Informatics and Statistics, Medical University of Gdansk, Gdansk, Poland.
Marcin GruszeckiDepartment of Radiology Informatics and Statistics, Medical University of Gdansk, Gdansk, Poland.
Wojciech GuminskiDepartment of Computer Communications, Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Gdansk, Poland.
Jacek KotNational Centre for Hyperbaric Medicine, Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Gdynia, Poland.
Andrzej F FrydrychowskiInstitute of Human Physiology, Medical University of Gdansk, Gdansk, Poland.
Ivan DrvisUniversity of Zagreb School of Kinesiology, Zagreb, Croatia.
Zeljko DujicDepartment of Integrative Physiology, University of Split School of Medicine, Split, Croatia.
Gdańsk Medical University · PLUniversity of Split · HRGdańsk University of Technology · PLUniversity of Novi Sad · RSUniversity of Zagreb · HR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe aim of the study was to assess changes in subarachnoid space width (sas-TQ), the marker of intracranial pressure (ICP), pial artery pulsation (cc-TQ) and cardiac contribution to blood pressure (BP), cerebral blood flow velocity (CBFV) and cc-TQ oscillations throughout the maximal breath hold in elite apnoea divers. Non-invasive assessment of sas-TQ and cc-TQ became possible due to recently developed method based on infrared radiation, called near-infrared transillumination/backscattering sounding (NIR-T/BSS).

methodsThe experimental group consisted of seven breath-hold divers (six men). During testing, each participant performed a single maximal end-inspiratory breath hold. Apnoea consisted of the easy-going and struggle phases (characterised by involuntary breathing movements (IBMs)). Heart rate (HR) was determined using a standard ECG. BP was assessed using the photoplethysmography method. SaO2 was monitored continuously with pulse oximetry. A pneumatic chest belt was used to register thoracic and abdominal movements. Cerebral blood flow velocity (CBFV) was estimated by a 2-MHz transcranial Doppler ultrasonic probe. sas-TQ and cc-TQ were measured using NIR-T/BSS. Wavelet transform analysis was performed to assess cardiac contribution to BP, CBFV and cc-TQ oscillations.

resultsMean BP and CBFV increased compared to baseline at the end of the easy phase and were further augmented by IBMs. cc-TQ increased compared to baseline at the end of the easy phase and remained stable during the IBMs. HR did not change significantly throughout the apnoea, although a trend toward a decrease during the easy phase and recovery during the IBMs was visible. Amplitudes of BP, CBFV and cc-TQ were augmented. sas-TQ and SaO2 decreased at the easy phase of apnoea and further decreased during the IBMs.

conclusionsApnoea increases intracranial pressure and pial artery pulsation. Pial artery pulsation seems to be stabilised by the IBMs. Cardiac contribution to BP, CBFV and cc-TQ oscillations does not change throughout the apnoea.

Indexed as

ApneaAdolescentAdultBlood Flow VelocityBlood PressureBreath HoldingCase-Control StudiesCerebral ArteriesCerebrovascular CirculationFemaleHealthy VolunteersHeart RateHumansMaleSubarachnoid SpaceWavelet Analysis

Identifiers

PMID26285143
PMCPMC4540420
OpenAlexW1772180589

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.