Evidence map›Paper›PMID 25888513›Full record

ArticleAmerican journal of physiology. Heart and circulatory physiology2015

Reducing the number of parameters in 1D arterial blood flow modeling: less is more for patient-specific simulations.

Sally Epstein, Marie Willemet, Phil J Chowienczyk, Jordi Alastruey

Registry-linked trialAbstract read
In one paragraph

Article in American journal of physiology. Heart and circulatory physiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04817137 (Validation of a Novel Non-invasive Continuous Blood Pressure Monitor in Children Ages 2- 17 Years-old), which is not on this map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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.

NCT04817137 nacompletednot on this mapstarted 2021, after this paper: background citation

Validation of a Novel Non-invasive Continuous Blood Pressure Monitor in Children Ages 2- 17 Years-old

TypeinterventionalSponsorBoston Children's HospitalRan2021 to 2023Enrolled35ConditionsBlood PressureArmsCareTaker PDA Device
3 · Its place in the literature

Who cites it

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

  1. Pooled it
  2. Trial
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  4. Uncertainty quantification of the pressure waveform using a Windkessel model.International journal for numerical methods in biomedical engineering · 2024
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  7. Review
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  13. Estimating central blood pressure from aortic flow: development and assessment of algorithms.American journal of physiology. Heart and circulatory physiology · 2021
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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

4 authors.

Sally EpsteinDivision of Imaging Sciences and Biomedical Engineering, St. Thomas' Hospital, King's College London, London, United Kingdom; and.
Marie WillemetDivision of Imaging Sciences and Biomedical Engineering, St. Thomas' Hospital, King's College London, London, United Kingdom; and.
Phil J ChowienczykDepartment of Clinical Pharmacology, St. Thomas' Hospital, King's College London, London, United Kingdom.
Jordi AlastrueyDivision of Imaging Sciences and Biomedical Engineering, St. Thomas' Hospital, King's College London, London, United Kingdom; and jordi.alastruey-arimon@kcl.ac.uk.

Funding

British Heart Foundation FS/09/030/27812Wellcome Trust WT 088641/Z/09/Z
6 · The paper itself

Abstract

Patient-specific one-dimensional (1D) blood flow modeling requires estimating model parameters from available clinical data, ideally acquired noninvasively. The larger the number of arterial segments in a distributed 1D model, the greater the number of input parameters that need to be estimated. We investigated the effect of a reduction in the number of arterial segments in a given distributed 1D model on the shape of the simulated pressure and flow waveforms. This is achieved by systematically lumping peripheral 1D model branches into windkessel models that preserve the net resistance and total compliance of the original model. We applied our methodology to a model of the 55 larger systemic arteries in the human and to an extended 67-artery model that contains the digital arteries that perfuse the fingers. Results show good agreement in the shape of the aortic and digital waveforms between the original 55-artery (67-artery) and reduced 21-artery (37-artery) models. Reducing the number of segments also enables us to investigate the effect of arterial network topology (and hence reflection sites) on the shape of waveforms. Results show that wave reflections in the thoracic aorta and renal arteries play an important role in shaping the aortic pressure and flow waves and in generating the second peak of the digital pressure and flow waves. Our novel methodology is important to simplify the computational domain while maintaining the precision of the numerical predictions and to assess the effect of wave reflections.

Indexed as

Computer SimulationHemodynamicsModels, CardiovascularAortaArteriesBlood Flow VelocityBlood PressureHumansRenal Artery1D modelingaortic pulse wavedigital pulse wavehypertensionwindkessel model

Identifiers

PMID25888513
PMCPMC4491523

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Registered trials

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.