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Cognitive Outcome After Carotid Surgery

22. november 2019 opdateret af: Lahey Clinic
The purpose of this study is to understand how carotid endarterectomy (CEA) or percutaneous carotid angioplasty and stenting (CAS) affect memory and thinking resulting in improving or worsening of thinking or memory. There have been many studies on this subject, some finding that certain patients gain improvement in their brain function and others might get worse. The goal of this study is to discover which patients are more likely to have improved cognitive functioning. Carotid endarterectomy (CEA) and percutaneous carotid angioplasty and stenting (CAS) are not investigational and are an accepted treatment for your condition. In addition, subjects that choose not to undergo surgery will also be included in this study.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

At the present time, large multi-center clinical trials support the use of carotid revascularization for symptomatic carotid stenosis and for asymptomatic carotid stenosis (greater than 60%) to prevent stroke. Guidelines supporting the use of carotid endarterectomy for asymptomatic stenosis are based largely on the Asymptomatic Carotid Atherosclerosis Study (ACAS) which reported a 47% relative risk reduction for ipsilateral stroke or death in patients randomized to surgery compared to best medical management over 5 years. These data were further substantiated by the recent publication of the Medical Research Council Asymptomatic Carotid Surgery (ACST) trial results (1); however, both trials estimated that at least 40 operative procedures were required to prevent a single disabling stroke or death in one patient after 5 years (2). These data underscore the importance of understanding the cognitive risks of carotid revascularization and developing strategies to limit factors that contribute to this risk especially in asymptomatic patients.

The purpose of this study is to better understand the effect of carotid revascularization (using either carotid endarterectomy (CEA) or percutaneous carotid angioplasty and stenting (CAS)) on cognitive outcome by prospectively collecting cerebral blood flow data and cognitive testing data prior to and after carotid revascularization procedures.

Undersøgelsestype

Observationel

Tilmelding (Forventet)

56

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Massachusetts
      • Burlington, Massachusetts, Forenede Stater, 01805
        • Lahey Clinic, Inc.
    • New York
      • Buffalo, New York, Forenede Stater, 14203
        • University of Buffalo Neurosurgery (UBNS)
      • Stony Brook, New York, Forenede Stater, 11794-8122
        • StonyBrook

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

Patients with unilateral, asymptomatic, significant carotid artery stenosis who are ≥18 years of age who do not present with past or current significant cerebrovascular and neuropsychological disease.

Beskrivelse

Inclusion Criteria:

  • Patients with asymptomatic (defined as no symptoms in past 6 months) carotid stenosis
  • Patients with hemodynamically significant carotid artery stenosis (according to CREST criteria: ≥ 60% by angiography, OR ≥ 70% by ultrasound, OR ≥ 80% by CTA or MRA)

Exclusion Criteria:

  • Patients with prior large vessel infarct
  • Patients with intracranial stenosis
  • Patients with major depression
  • Patients with Alzheimer disease (clinically defined or Wechsler IQ <80)
  • Patients who have had previous ipsilateral carotid surgery
  • Patients with baseline dementia defined as: Mini-Mental Status Examination score < 21 OR Mini-Mental score ≥21 AND Baseline HVLT scores more than 3 standard deviations below normal or FAS scores more than 2 standard deviations below normal OR other clinical symptoms that were not as evident on direct cognitive assessment (e.g. sundowning, getting lost while driving).

Note: A control group would be comprised of about 15 patients who meet eligibility criteria as above, but elect to have their condition followed rather than undergo revascularization.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Carotid Endarterectomy (CEA)
Surgical Revascularization- Carotid Endarterectomy (CEA)
Carotid Angioplasty and Stenting (CAS)
Surgical Revascularization- Carotid Angioplasty and Stenting (CAS)
Control Group- Medical Management

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Measurement of change in cerebral blood flow from pre-op/baseline to 1 month post-operatively.
Tidsramme: preoperative/baseline and 1 month postoperative/from baseline
Quantitative flow MRA studies will be performed pre-operative and postoperative for those undergoing carotid revascularization surgery. Those not undergoing surgery will have this test upon study enrollment and approximately 1 month from study enrollment date.
preoperative/baseline and 1 month postoperative/from baseline

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Mini Mental Status Exam
Tidsramme: Pre-operative/baseline
A standardized cognitive measure
Pre-operative/baseline
Trail Making- Part A
Tidsramme: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
Standardized cognitive measure that assesses verbal fluency
Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
Trail Making- Part B
Tidsramme: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
Standardized cognitive measure that assesses executive functioning
Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
Hopkins Verbal Learning Test (HVLT)
Tidsramme: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
Standardized measure to assess new learning and memory
Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
D-KEFS Verbal Fluency Test (FAS)
Tidsramme: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
Standardized measure to assess letter fluency
Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Lahey Clinic

Efterforskere

  • Ledende efterforsker: Zoher Ghogawala, MD, Lahey Clinic, Inc.

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. april 2014

Primær færdiggørelse (Faktiske)

1. november 2019

Studieafslutning (Faktiske)

1. november 2019

Datoer for studieregistrering

Først indsendt

15. april 2014

Først indsendt, der opfyldte QC-kriterier

16. april 2014

Først opslået (Skøn)

21. april 2014

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

26. november 2019

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

22. november 2019

Sidst verificeret

1. marts 2018

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2013-009

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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