Evidence map›Paper›PMID 27318053›Full record

ArticleJournal of vascular surgery. Venous and lymphatic disorders2016

Simulated thrombin responses in venous valves.

E Victoria Dydek, Elliot L Chaikof

Open access · greenAbstract read
In one paragraph

Article in Journal of vascular surgery. Venous and lymphatic disorders, 2016. 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
1.4field-weighted citation impact, top 18% 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

2 authors at 2 institutions in 2 countries.

E Victoria DydekDepartment of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass.
Elliot L ChaikofDepartment of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass; Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, Mass; Division of Health Sciences Technology, Harvard-MIT, Cambridge, Mass. Electronic address: echaikof@bidmc.harvard.edu.
Beth Israel Deaconess Medical Center · USHarvard University · US

Funding

MEMBRANE-MIMETIC ASSEMBLIES FOR ENDOTHELIAL MIGRATIONR01HL056819 · NHLBI · EMORY UNIVERSITY · PI CHAIKOF, ELLIOT · 1998 to 2016
$5.2M
A Bioinspired Small Diameter Vascular ConduitR01HL083867 · NHLBI · EMORY UNIVERSITY · PI CHAIKOF, ELLIOT · 2006 to 2010
$3.8M
Autogeneration of an Artery: A Biomimetric StrategyR01HL060464 · NHLBI · EMORY UNIVERSITY · PI CHAIKOF, ELLIOT · 1998 to 2007
$2.3M
Site-Specific Therapies To Prevent Intimal HyperplasiaR01HL106018 · NHLBI · BETH ISRAEL DEACONESS MEDICAL CENTER · PI CHAIKOF, ELLIOT · 2011 to 2014
$1.6M
NHLBI NIH HHS R01 HL056819NHLBI NIH HHS R01 HL060464NHLBI NIH HHS R01 HL083867NHLBI NIH HHS R01 HL106018
6 · The paper itself

Abstract

objectiveVenous thromboembolism frequently results in thrombi formation near or within the pocket of a venous valve due to recirculating hemodynamics, which has been largely attributed to hypoxia-induced tissue factor (TF) expression. Numerical models are now capable of assessing the spatiotemporal behavior of the TF-initiated coagulation cascade under nonuniform hemodynamics. The aim of this study was to use such a numerical simulation to analyze the degree and location of thrombin formation with respect to TF position in the presence of disturbed flow induced by an open venous valve.

methodsThrombin formation was simulated using a computational model that captures the hemodynamics, kinetics, and chemical transport of 22 biochemical species. Disturbed flow is described by the presence of a valve in the equilibrium phase of the valve cycle with leaflets in a fully open position. Three different positions of TF downstream of the valve opening were investigated.

resultsThe critical amount of TF required to initiate a thrombotic response is reduced by up to 80% when it is positioned underneath the recirculating regions near the valve opening. In addition, because of the increased surface area of the open valve cusp in conjunction with recirculating hemodynamics, it was observed that thrombin is generated inside the valve pocket even when the exposed region of TF is downstream of the valve.

conclusionsThe presence of prothrombotic surface reactions in conjunction with recirculating hemodynamics provides an additional mechanism for thrombus formation in venous valves that does not require direct damage or dysfunction to the valve itself.

Indexed as

HemodynamicsModels, CardiovascularBlood CoagulationComputer SimulationHumansThrombinThromboplastinVenous ValvesThrombinThromboplastin

Identifiers

PMID27318053
PMCPMC4913030
OpenAlexW2174011324

What OpenQuestion holds

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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.