Evidence map›Paper›PMID 24722312›Full record

ArticleAJNR. American journal of neuroradiology2014

Brain structure and function in patients after metal-on-metal hip resurfacing.

M J Clark, J R Prentice, N Hoggard, M N Paley, M Hadjivassiliou, J M Wilkinson

Open access · hybridAbstract read
In one paragraph

Article in AJNR. American journal of neuroradiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 2 pooled it
2.3field-weighted citation impact, top 12% 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

26 citing papers in PubMed, 2 syntheses or guidelines pooled it, 44 citations in OpenAlex.

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  19. F-18 FDG PET brain imaging in symptomatic arthroprosthetic cobaltism.European journal of nuclear medicine and molecular imaging · 2020
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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

6 authors at 2 institutions in 1 country.

M J ClarkFrom the Departments of Human Metabolism (M.J.C., J.R.P., J.M.W.).
J R PrenticeFrom the Departments of Human Metabolism (M.J.C., J.R.P., J.M.W.).
N HoggardCardiovascular Science (N.H., M.N.P.), University of Sheffield, The Medical School, Sheffield, United Kingdom.
M N PaleyCardiovascular Science (N.H., M.N.P.), University of Sheffield, The Medical School, Sheffield, United Kingdom.
M HadjivassiliouDepartment of Neurology (M.H.), Sheffield Teaching Hospitals National Health Service Foundation Trust, Royal Hallamshire Hospital, Sheffield, United Kingdom.
J M WilkinsonFrom the Departments of Human Metabolism (M.J.C., J.R.P., J.M.W.) Department of Orthopaedics (J.M.W.), Sheffield Teaching Hospitals National Health Service Foundation Trust, Northern General Hospital, Sheffield, United Kingdom. j.m.wilkinson@sheffield.ac.uk.
University of Sheffield · GBRoyal Hallamshire Hospital · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeHip prostheses that use a metal-on-metal articulation expose the brain to elevated metal concentrations that, in acute excess due to prosthesis malfunction, is associated with neurologic damage, including visual and hearing loss and motor deficits. Here, we examined whether chronic exposure to lower elevated metal levels, typical of well-functioning prostheses, also affects brain structure and function. MATERIALS AND

methodsWe compared brain volumes, metal deposition, and gray matter attenuation by MR imaging and clinical neurologic function in patients 8 years after receiving a metal-on-metal hip resurfacing versus a matched group of patients with the same duration exposure to a conventional hip prosthesis.

resultsTwenty-nine patients (25 men; mean, age 59±7 years) after metal-on-metal hip resurfacing and 29 patients (25 men; 59±8 years) after total hip arthroplasty were compared. Whole blood cobalt and chromium concentrations were 5-10 times higher in the metal-on-metal hip resurfacing group (P<.0001). Occipital cortex gray matter attenuation tended to be lower (P<.005 uncorrected, P>.05 corrected), and the optic chiasm area tended to be lower (mean difference, -2.7 mm2; P=.076) in the metal-on-metal hip resurfacing group. Subgroup analyses in 34 patients (17 per group), after exclusion of primary ocular pathology, showed the same trend in gray matter attenuation in the occipital cortex and basal ganglia and a smaller optic chiasm in the metal-on-metal hip resurfacing group (mean difference, -3.9 mm2; P=.048). No other structural or functional differences were found between the groups.

conclusionsChronic exposure to metal-on-metal hip resurfacing is associated with subtle structural change in the visual pathways and the basal ganglia in asymptomatic patients.

Indexed as

AdultAgedArthroplasty, Replacement, HipBasal GangliaBrainChromiumCobaltFemaleHip ProsthesisHumansMaleMiddle AgedVisual PathwaysChromiumCobalt

Identifiers

PMID24722312
PMCPMC7966284
OpenAlexW2093103149

What OpenQuestion holds

Textmetadata
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.