Evidence map›Paper›PMID 25649968›Full record

ArticleClinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology2015

The human burst suppression electroencephalogram of deep hypothermia.

M Brandon Westover, Shinung Ching, Vishakhadatta M Kumaraswamy, Seun Oluwaseun Akeju, Eric Pierce, Sydney S Cash, Ronan Kilbride, Emery N Brown, Patrick L Purdon

Abstract read
In one paragraph

Article in Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
3.5field-weighted citation impact, top 7% 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

26 citing papers in PubMed, 1 synthesis or guideline pooled it, 45 citations in OpenAlex.

  1. Pooled it
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  12. General anesthesia and sleep: like and unlike.Anesthesia and pain medicine · 2022
    Review
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  15. Review
  16. Etiology of Burst Suppression EEG Patterns.Frontiers in psychology · 2021
    Article
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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

9 authors at 4 institutions in 2 countries.

M Brandon Westover *Department of Neurology, Massachusetts General Hospital, Boston, MA, USA.
Shinung Ching *Electrical and Systems Engineering, Washington University in St. Louis, St. Louis MO 63130, USA.
Vishakhadatta M KumaraswamyDepartment of Neurology, Massachusetts General Hospital, Boston, MA, USA.
Seun Oluwaseun AkejuDepartment of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA, USA.
Eric PierceDepartment of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA, USA.
Sydney S CashDepartment of Neurology, Massachusetts General Hospital, Boston, MA, USA.
Ronan KilbrideDepartment of Neurology, Beaumont Hospital, Dublin, Ireland.
Emery N BrownDepartment of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA, USA.
Patrick L PurdonDepartment of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA, USA.
Massachusetts General Hospital · USHarvard University · USBeaumont Hospital · IEWashington University in St. Louis · US

Funding

Research Training for AnesthetistsT32GM007592 · NIGMS · MASSACHUSETTS GENERAL HOSPITAL · PI STUART A FORMAN · 1985 to 2026
$11.8M
Redesigning General Anesthesia (Admin Supp)R01GM104948 · NIGMS · MASSACHUSETTS INSTITUTE OF TECHNOLOGY · PI BOYDEN, EDWARD S., BROWN, EMERY N · 2012 to 2016
$4.4M
A Systems Neuroscience Approach for the Study of General AnesthesiaDP1OD003646 · OD · MASSACHUSETTS GENERAL HOSPITAL · PI BROWN, EMERY N · 2007 to 2011
$4.4M
A Neural Systems Approach to Monitoring and Drug-Delivery for General AnesthesiaDP2OD006454 · OD · MASSACHUSETTS GENERAL HOSPITAL · PI PURDON, PATRICK L. · 2009 to 2009
$2.7M
Quantitative Monitoring and Control of Sedation and Pain in the ICU EnvironmentK23NS090900 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI WESTOVER, MICHAEL BRANDON · 2014 to 2018
$988k
NIGMS NIH HHS R01 GM104948NIGMS NIH HHS T32 GM007592NIGMS NIH HHS T32GM007592NIGMS NIH HHS TR01-GM104948NIH HHS DP1 OD003646NIH HHS DP1-OD003646NIH HHS DP2 OD006454NINDS NIH HHS K23 NS090900Wellcome Trust
6 · The paper itself

Abstract

objectiveDeep hypothermia induces 'burst suppression' (BS), an electroencephalogram pattern with low-voltage 'suppressions' alternating with high-voltage 'bursts'. Current understanding of BS comes mainly from anesthesia studies, while hypothermia-induced BS has received little study. We set out to investigate the electroencephalogram changes induced by cooling the human brain through increasing depths of BS through isoelectricity.

methodsWe recorded scalp electroencephalograms from eleven patients undergoing deep hypothermia during cardiac surgery with complete circulatory arrest, and analyzed these using methods of spectral analysis.

resultsWithin patients, the depth of BS systematically depends on the depth of hypothermia, though responses vary between patients except at temperature extremes. With decreasing temperature, burst lengths increase, and burst amplitudes and lengths decrease, while the spectral content of bursts remains constant.

conclusionsThese findings support an existing theoretical model in which the common mechanism of burst suppression across diverse etiologies is the cyclical diffuse depletion of metabolic resources, and suggest the new hypothesis of local micro-network dropout to explain decreasing burst amplitudes at lower temperatures. SIGNIFICANCE: These results pave the way for accurate noninvasive tracking of brain metabolic state during surgical procedures under deep hypothermia, and suggest new testable predictions about the network mechanisms underlying burst suppression.

Indexed as

AdultAgedBrainElectroencephalographyFemaleHumansHypothermia, InducedMaleMiddle AgedMonitoring, IntraoperativeRetrospective StudiesBurst suppressionElectroencephalogramHypothermia

Identifiers

PMID25649968
PMCPMC4504839
OpenAlexW2085770880

What OpenQuestion holds

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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.