Evidence map›Paper›PMID 29304526›Full record

ArticleThrombosis and haemostasis2018

Thromboelastometry and Platelet Function during Acclimatization to High Altitude.

Alistair S Rocke, Gordon G Paterson, Matthew T Barber, Alexander I R Jackson, Shona E Main, Calum Stannett, Martin F Schnopp, Martin MacInnis, J Kenneth Baillie, Elizabeth H Horn and 4 more

Erratum issuedOpen access · hybridAbstract read
In one paragraph

Article in Thrombosis and haemostasis, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
2.7field-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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

14 authors at 6 institutions in 1 country.

Alistair S RockeApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Gordon G PatersonApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Matthew T BarberApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Alexander I R JacksonApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Shona E MainApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Calum StannettApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Martin F SchnoppApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Martin MacInnis
J Kenneth BaillieApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Elizabeth H HornDepartment of Clinical Haematology, St James's University Hospital, Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom.
Carl MooresDepartment of Anaesthesia, Critical Care and Pain Medicine, Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, United Kingdom.
Paul HarrisonInstitute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom.
Alastair F NimmoDepartment of Anaesthesia, Critical Care and Pain Medicine, Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, United Kingdom.
A A Roger ThompsonApex (Altitude Physiology Expeditions), Edinburgh, United Kingdom.
Expedition (United Kingdom) · GBEdinburgh Royal Infirmary · GBLeeds Teaching Hospitals NHS Trust · GBRoslin Institute · GBUniversity of Birmingham · GBUniversity of Southampton · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

Interaction between hypoxia and coagulation is important given the increased risk of thrombotic diseases in chronically hypoxic patients who reside at sea level and in residents at high altitude. Hypoxia alters the proteome of platelets favouring a prothrombotic phenotype, but studies of activation and consumption of specific coagulation factors in hypoxic humans have yielded conflicting results. We tested blood from 63 healthy lowland volunteers acclimatizing to high altitude (5,200 m) using thromboelastometry and assays of platelet function to examine the effects of hypoxia on haemostasis. Using data from two separate cohorts of patients following identical ascent profiles, we detected a significant delay in clot formation, but increased clot strength by day 7 at 5,200 m. The latter finding may be accounted for by the significant rise in platelet count and fibrinogen concentration that occurred during acclimatization. Platelet function assays revealed evidence of platelet hyper-reactivity, with shortened PFA-100 closure times and increased platelet aggregation in response to adenosine diphosphate. Post-expedition results were consistent with the normalization of coagulation following descent to sea level. These robust findings indicate that hypoxia increases platelet reactivity and, with the exception of the paradoxical delay in thromboelastometry clotting time, suggest a prothrombotic phenotype at altitude. Further work to elucidate the mechanism of platelet activation in hypoxia will be important and could impact upon the management of patients with acute or chronic hypoxic respiratory diseases who are at risk of thrombotic events.

Indexed as

AcclimatizationAltitudePlatelet Function TestsThrombelastographyAdolescentAdultBlood CoagulationBoliviaCohort StudiesFemaleHealthy VolunteersHemostasisHumansHypoxiaMaleOxygenOxygenProteome

Identifiers

PMID29304526
PMCPMC6260116
OpenAlexW2781763212

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.