Evidence map›Paper›PMID 18719035›Full record

ArticleAJNR. American journal of neuroradiology2008

Renal safety of CT angiography and perfusion imaging in the emergency evaluation of acute stroke.

J J Hopyan, D J Gladstone, G Mallia, J Schiff, A J Fox, S P Symons, B H Buck, S E Black, R I Aviv

Abstract readControlled Clinical Trial
In one paragraph

Article in AJNR. American journal of neuroradiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 3 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.

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

40 citing papers in PubMed, 3 syntheses or guidelines pooled it.

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  10. Minimal Imaging Requirements.Journal of neuroendovascular therapy · 2023
    Review
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  18. Article
  19. Imaging of acute ischemic stroke.Emergency radiology · 2018
    Review
  20. 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

9 authors.

J J HopyanDivision of Neurology, Department of Medicine, North & East Greater Toronto Area Ontario Regional Stroke Centre, and Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada. julia.hopyan@sunnybrook.ca
D J Gladstone
G Mallia
J Schiff
A J Fox
S P Symons
B H Buck
S E Black
R I Aviv

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeMultimodal CT imaging with contrast-enhanced CT angiography (CTA) and CT perfusion (CTP) is increasingly being used to guide emergency management of acute stroke. However, little has been reported about the safety of intravenous contrast administration associated with these studies in the acute stroke population, including cases in which baseline creatinine values are unknown. We investigated the incidence of contrast-induced nephropathy (CIN), defined as a 25% or more increase in baseline creatinine levels within 72 hours of contrast administration and chronic kidney disease in patients receiving CTA+/-CTP at our regional stroke center. MATERIALS AND

methodsWe analyzed 198 patients who underwent contrast CT studies for evaluation of acute ischemic or hemorrhagic stroke at our center (2003-2007). Through retrospective chart abstraction, we analyzed serial creatinine levels (baseline to day 3) and later values (>/=day 4) where available. The incidences of CIN and/or chronic kidney disease were documented. After power analysis, CIN and non-CIN groups were compared by using the unpaired t test, Wilcoxon rank sum test, or Fisher exact test.

resultsNone of the 198 patients developed chronic kidney disease or required dialysis. Of 175 patients with serial creatinine measurements between baseline and day 3, 5 (2.9%) developed CIN. The incidence of CIN was 2% in patients who were scanned before a baseline creatinine level was available.

conclusionThe incidence of renal sequelae is relatively low in acute stroke patients undergoing emergent multimodal CT scanning. Prompt CTA/CTP imaging of acute stroke, if indicated, need not be delayed in those with no history of renal impairment.

Indexed as

Acute DiseaseAgedCerebral AngiographyContrast MediaCreatinineEmergency Medical ServicesFemaleHumansKidney DiseasesMaleRetrospective StudiesStrokeContrast MediaCreatinine

Identifiers

PMID18719035
PMCPMC8118945

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.