Evidence map›Paper›PMID 27695538›Full record

ArticleAsian journal of neurosurgery

Wall-to-lumen ratio of intracranial arteries measured by indocyanine green angiography.

Daichi Nakagawa, Masaaki Shojima, Masanori Yoshino, Taichi Kin, Hideaki Imai, Seiji Nomura, Toki Saito, Hirofumi Nakatomi, Hiroshi Oyama, Nobuhito Saito

Open access · hybridAbstract read
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In one paragraph

Article in Asian journal of neurosurgery. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed, 1 pooled it
0.3field-weighted citation impact, top 35% 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

3 citing papers in PubMed, 1 synthesis or guideline pooled it, 10 citations in OpenAlex.

  1. Pooled it
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  3. Article
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

10 authors at 1 institution in 1 country.

Daichi NakagawaDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Masaaki ShojimaDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Masanori YoshinoDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Taichi KinDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Hideaki ImaiDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Seiji NomuraDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Toki SaitoDepartment of Clinical Information Engineering, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Hirofumi NakatomiDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Hiroshi OyamaDepartment of Clinical Information Engineering, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
Nobuhito SaitoDepartment of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan.
The University of Tokyo · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe wall-to-lumen ratio (WLR) is an important parameter in vascular medicine because it indicates the character of vascular wall as well as the degree of stenosis. Despite the advances in medical imaging technologies, it is still difficult to measure the thin-walled normal intracranial arteries, and the reports on the WLR of normal intracranial artery are limited. It might be possible to calculate the WLR using the indocyanine green (ICG) angiography, which is used to observe intracranial vessels during microsurgery. PURPOSE: To evaluate the WLR of normal intracranial arteries using ICG angiography. MATERIALS AND

methodsFrom the three cases in which ICG angiography was recorded with a ruler during microsurgery, 20 measurement points were chosen for the analysis. The ICG was injected intravenously with a dose of 0.2 mg/kg, and the vessels were inspected at high magnification using an operating microscope equipped with near-infrared illumination system. The vessel outer diameter and the luminal diameter were measured using the images before and after the ICG arrival based on the pixel ratio method using a ruler as reference, respectively. The WLR was calculated as 0.5 × (vessel outer diameter - vessel luminal diameter).

resultsThe WLR (mean ± standard deviation) of normal intracranial arteries was 0.086 ± 0.022. The WLR tended to be high in small arteries.

conclusionThe WLR of normal intracranial arteries calculated using ICG angiography was consistent with the WLR reported in the previous reports based on human autopsy.

Indexed as

indocyanine green angiographyintracranial arteryIn vivonormalvascular wallwall-to-lumen ratio

Identifiers

PMID27695538
PMCPMC4974959
OpenAlexW2474855957

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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.