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Latin-American Von Willebrand Disease Registry

19. februar 2020 opdateret af: Academia Nacional de Medicina

Establish a Latin-American network of centers and professionals with the aim of:

  • To register VWD patients in retrospective/prospective study, using a database, available online, common to all
  • To register the bleeding history, the treatment and the events of VWD patients in the region
  • To investigate the influence of VWD on quality of life

Studieoversigt

Status

Ukendt

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

von Willebrand disease (VWD) is the most common autosomal bleeding disorder, mostly inherited as dominant trait. VWD is due to deficiency/abnormality of von Willebrand factor (VWF). The prevalence of VWD is unknown, but estimated as 0.1% to 1% of the general population. Although the autosomal inheritance pattern would suggest an equal distribution of male and female patients, the disease is diagnosed in more females because of female-specific hemostatic challenges: menses, ovulation, pregnancy and childbirth. Diagnosis of VWD is made by assessing personal and family history of bleeding, physical examination and completed with specific laboratory tests.

There is limited information on the epidemiology of VWD in developing countries. Some countries in Latin America have registries of severe disease that, although it is the rarest form, carries the highest costs for regional health systems. So that the prevalence of clinical symptoms and laboratory features of the disease as well as the management of the disease in Latin America is unknown.

The present project aims to establish a network of centers and professionals with the objective to register and investigate all patients with VWD in Latin America, using a database available online common to all, to gain understanding about phenotype, genotype and management of VWD in the region.

Undersøgelsestype

Observationel

Tilmelding (Forventet)

500

Kontakter og lokationer

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

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

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

N/A

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Patients with von Willebrand disease

Beskrivelse

Inclusion Criteria:

  • Historically lowest VWF:Ag and/or VWF:RCo and/or VWF:CB < 0.50 IU/ml and/or FVIII:C < 0.50 IU/ml
  • All types of VWD
  • All ages

Exclusion Criteria:

  • Patient without consent to participate

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: Kohorte
  • Tidsperspektiver: Tværsnit

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Subjects with von Willbrand Disease Acquired
Andet: Observation
Ingen planlagte interventioner: behandling af patienter efter den behandlende/ansvarlige læges skøn
Subjects with von Willbrand Disease Congenital
Andet: Observation
Ingen planlagte interventioner: behandling af patienter efter den behandlende/ansvarlige læges skøn

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Register of VWD patients in Latin America
Tidsramme: assessed up to 33 months
Clinical presentation in hereditary/acquired VWD. Phenotype and genetic diagnosis.
assessed up to 33 months
Registration of the bleeding history
Tidsramme: From date of selection until the date registration, assessed up to 33 months.
Bleeding history is an essential component in the diagnosis of von Willebrand disease (VWD). ISTH Bleeding Assessment Tool (ISTH-BAT) is used to assist the diagnosis.
From date of selection until the date registration, assessed up to 33 months.
Response to Treatment: Follow up of FVIII, VWF:Ag and VWF:RCo
Tidsramme: Until the end of the registry, an average of 33 months.
The aim of therapy is to correct the dual hemostatic defect, due to defective platelet adhesion-aggregation and abnormal coagulation due to Factor VIII (FVIII) deficiency. The choice of treatment depends on a number of factors, including the severity of the bleed, the procedure planned, the subtype and severity of the disease and the age and morbidity of the patient. The evaluation of the response to the treatment is going to be through the measure of FVIII, vWF Antigen (VWF:Ag) and vWF ristocetin cofactor (vWF:RCo).
Until the end of the registry, an average of 33 months.
Adverse Events: Number of patients with bleeding events
Tidsramme: until the end of the registry, an average of 33 months.
Bleeding disorders and their treatment impact on patients, especially in women, can affect the everyday life of patients and their families. Measure of number of bleeding events, laboratory results such as Sodium.
until the end of the registry, an average of 33 months.

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Pregnancy outcome: Follow up of FVIII, VWF:Ag and VWF:RCo
Tidsramme: Through study completion, an average of 2 years
For many women with VWD, pregnancy is a time of few bleeding problems. Women with Type 3 von Willebrand disease seem to have more frequent miscarriages, especially during the first trimester. The evaluation of the response to the treatment is going to be through the measure of FVIII, vWF Antigen (VWF:Ag) and vWF ristocetin cofactor (vWF:RCo).
Through study completion, an average of 2 years

Samarbejdspartnere og efterforskere

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

Sponsor

Academia Nacional de Medicina

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 (Forventet)

1. februar 2020

Primær færdiggørelse (Forventet)

1. december 2022

Studieafslutning (Forventet)

1. december 2022

Datoer for studieregistrering

Først indsendt

7. februar 2020

Først indsendt, der opfyldte QC-kriterier

19. februar 2020

Først opslået (Faktiske)

21. februar 2020

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

21. februar 2020

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

19. februar 2020

Sidst verificeret

1. februar 2020

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • Protocol_3081

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

Ja

IPD-deling Understøttende informationstype

  • Studieprotokol
  • Klinisk undersøgelsesrapport (CSR)

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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Kliniske forsøg med Von Willebrands sygdom

Kliniske forsøg med Observation

Søg i lignende forsøg

Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

CROs by country

CROs in Myanmar

Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner