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Retinal Vessel Analysis (rGA) at the Patient Bed in the Context of Non-traumatic Subarachnoid Haemorrhage

17. september 2019 opdateret af: Gerrit Alexander Schubert, RWTH Aachen University

A subarachnoid hemorrhage occurs in about 10 out of 100,000 people each year. This bleeding leads to irritation and constriction of blood vessels in the brain (vasospasm) in two out of three people affected within four to 21 days and thus to reduced blood flow. This can lead to a stroke and serious damage. In order to be able to diagnose and treat a constriction of the blood vessels at an early stage, there are various examination methods which, however, have various disadvantages such as radiation exposure of the patient, low sensitivity or high effort. Therefore, the prediction and timely therapy of vascular constrictions is currently only successful in a few cases before the reduced blood flow has already led to irreversible damage.

The aim of this study is to investigate whether the so-called retinal vascular analysis can be used in addition to previous standard examinations for the early detection of diseases of the cerebral blood circulation. This method has few side effects and has been successfully used for 50 years to examine the blood circulation in the eye.

Studieoversigt

Status

Ukendt

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Forventet)

150

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Tyskland
      • Aachen, Tyskland, 52074
        • Rekruttering
        • Uniklinik RWTH Aachen, Klinik für Neurochirurgie
        • Kontakt:

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

Beskrivelse

Inclusion Criteria:

  • Female or male patient, age ≥ 18 years
  • Inpatient stay in the clinic
  • Written informed consent for participation in the study prior to beginning of treatment
  • Written consent for further evaluation of the images and for the scientific publication of the study results
  • Non-traumatic subarachnoid haemorrhage confirmed by computer tomography or magnetic resonance tomography or cerebrospinal fluid puncture (collection of nerve water from the lower part of the lumbar spine

Exclusion Criteria:

  • Female or male patient < 18 years
  • Pregnancy, Lactation
  • Lack of written consent to participate in the study and to further evaluate the image material collected
  • Known allergy to MS eye drops (active substance: phenylephrine/tropicamide
  • Narrow chamber angle, narrow angle glaucoma, Terson syndrome (if it makes retinal vascular imaging impossible
  • Persons in a dependency or employment relationship with the investigator
  • Persons who are accommodated in a facility by judicial or administrative order
  • Receipt and intake of a study drug within the last 30 days
  • Supine position in bed

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Diagnostisk
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Retinal fundoscopy
Retinal vascular analysis by retinal fundoscopy over a 3 week period in stationary patients after aneurysmatic subarachnoid hemorrhage
Diagnostisk test: retinal vascular analysis
Retinal fundoscopy over a 3 week period in stationary patients after aneurysmatic subarachnoid hemorrhage

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Clinical Progression of Delayed cortical ischemia
Tidsramme: 21 days
Delayed cortical ischemia as ischemia in cranial computer tomography or cranial magnetic resonance tomography that occurred later than 24 hours after admission to hospital
21 days

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Occurrence of delayed ischemic neurological deficit (DIND)
Tidsramme: 21 days
21 days
Angiographic vasospasm
Tidsramme: 7 days

Occurence of an angiographic vasospasm measured by:

  • Digital subtraction angiography at day 7 +/- 2 days or
  • transcranial doppler sonography: flow increase >150 cm/s absolute or increase >50 cm/s within 24 h
7 days
Metabolic deficiency supply
Tidsramme: 21 days
Measured as change in lactate-pyruvate ratio in microdialysis
21 days
Metabolic deficiency supply
Tidsramme: 21 days
Measured as change in reduction in parenchymal oxygen partial pressure measurement
21 days
Relative underperfusion
Tidsramme: 21 days
Measured by Perfusion-Computer-Tomography
21 days
Objective degree of recovery
Tidsramme: 3 Month
Measured by Glasgow-Outcome-Scale; Scale by which patients who have experienced brain damage can be divided into 5 groups that allow to describe the degree of recovery in a standardized and objective manner (1: death; 2: vegetative condition, the patient is unresponsive. The higher cognitive functions are extinguished; 3: severe disability, the patient is conscious, but cannot cope with normal everyday activities without help; 4: moderate disability, the patient can live largely independently, but is not able to pursue a normal working life; 5: light to no handicap, the neurological, physical, and psychological deficits are so low that the patient can participate normally in social and economic activities)
3 Month

Samarbejdspartnere og efterforskere

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

Sponsor

RWTH Aachen University

Efterforskere

  • Ledende efterforsker: Gerrit A Schubert, Prof. Dr., Principal Investigator

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 (Faktiske)

1. juli 2015

Primær færdiggørelse (Forventet)

1. januar 2021

Studieafslutning (Forventet)

1. januar 2021

Datoer for studieregistrering

Først indsendt

10. september 2019

Først indsendt, der opfyldte QC-kriterier

17. september 2019

Først opslået (Faktiske)

18. september 2019

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. september 2019

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

17. september 2019

Sidst verificeret

1. september 2019

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 14-061

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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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