Evidence map›Paper›PMID 29731323›Full record

ArticleJournal of biomechanics2018

On the variation in maternal birth canal in vivo viscoelastic properties and their effect on the predicted length of active second stage and levator ani tears.

Paige V Tracy, Shreya Wadhwani, Jourdan Triebwasser, Alan S Wineman, Francisco J Orejuela, Susan M Ramin, John O DeLancey, James A Ashton-Miller

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of biomechanics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
0.8field-weighted citation impact, top 27% 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

6 citing papers in PubMed, 11 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

8 authors at 2 institutions in 1 country.

Paige V TracyDepartment of Biomedical Engineering, University of Michigan, 2350 Hayward Street, Ann Arbor, MI 48109-2110, United States. Electronic address: voigtpai@umich.edu.
Shreya WadhwaniDepartment of Biomedical Engineering, University of Michigan, 2350 Hayward Street, Ann Arbor, MI 48109-2110, United States. Electronic address: shreyaw@umich.edu.
Jourdan TriebwasserDepartment of Obstetrics and Gynecology, University of Michigan, L4000 University Hospital South, 1500 E. Medical Center Dr., Ann Arbor, MI 48109-5276, United States. Electronic address: jtriebwa@med.umich.edu.
Alan S WinemanDepartment of Mechanical Engineering, University of Michigan, 2350 Hayward Street, Ann Arbor, MI 48109-2120, United States. Electronic address: lardan@umich.edu.
Francisco J OrejuelaDepartment of Obstetrics and Gynecology, Baylor College of Medicine, 6651 Main Street, Suite F320, Houston, TX 77030, United States. Electronic address: Francisco.Orejuela@bcm.edu.
Susan M RaminDepartment of Obstetrics and Gynecology, Baylor College of Medicine, 6651 Main Street, Suite F320, Houston, TX 77030, United States. Electronic address: smramin@bcm.edu.
John O DeLanceyDepartment of Obstetrics and Gynecology, University of Michigan, L4000 University Hospital South, 1500 E. Medical Center Dr., Ann Arbor, MI 48109-5276, United States. Electronic address: delancey@med.umich.edu.
James A Ashton-MillerDepartment of Biomedical Engineering, University of Michigan, 2350 Hayward Street, Ann Arbor, MI 48109-2110, United States; Department of Mechanical Engineering, University of Michigan, 2350 Hayward Street, Ann Arbor, MI 48109-2120, United States. Electronic address: jaam@umich.edu.
University of Michigan–Ann Arbor · USBaylor College of Medicine · US

Funding

Which pelvic floor defects cause stress incontinence?P50HD044406 · NICHD · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI DELANCEY, JOHN O.L. · 2002 to 2017
$17.1M
NICHD NIH HHS P50 HD044406
6 · The paper itself

Abstract

The pubovisceral muscles (PVM) help form the distal maternal birth canal. It is not known why 13% of vaginal deliveries end in PVM tears, so insights are needed to better prevent them because their sequelae can lead to pelvic organ prolapse later in life. In this paper we provide the first quantification of the variation in in vivo viscoelastic properties of the intact distal birth canal in healthy nulliparous women using Fung's Quasilinear Viscoelastic Theory and a secondary analysis of data from a clinical trial of constant force birth canal dilation to 8 cm diameter in the first stage of labor in 26 nullipara. We hypothesized that no significant inter-individual variation would be found in the long time constant, τ

Indexed as

ElasticityMothersParturitionFemaleHumansPregnancyRuptureVaginaViscosityBirthInjuryLevator aniSecond stage durationViscoelasticity

Identifiers

PMID29731323
PMCPMC5962441
OpenAlexW2799803851

What OpenQuestion holds

Textmetadata
LicenceTDM
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.