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Need for Antepartum Thromboprophylaxis in Pregnant Women With One Prior Episode of Venous Thromboembolism (VTE) (ROCITP2)

2. juni 2011 opdateret af: Hamilton Health Sciences Corporation

Prospective Study Assessing the Need for Antepartum Thromboprophylaxis in Pregnant Women With One Prior Episode of Venous Thromboembolism

Pregnant women with a prior history of venous thromboembolism (VTE) are at increased risk of recurrent VTE. Current guidelines assessing the role of prophylaxis in pregnant women with prior VTE are based primarily on expert opinion and the optimal clinical management strategy remains unclear.

This multicentre, prospective cohort study aims to test the following hypotheses:

  1. Antepartum prophylaxis with fixed-dose low molecular-weight heparin (LMWH) is safe, convenient and associated with an acceptably low risk of recurrent VTE in women with a single prior episode of VTE that was either unprovoked or associated with a minor transient risk factor. (Moderate risk cohort)
  2. Withholding antepartum prophylaxis is safe (recurrence risk <1%) in pregnant women with a single prior episode of VTE provoked by a major transient risk factor. (Low risk cohort)

All study patients will receive 6 weeks of postpartum prophylaxis.

Studieoversigt

Status

Ukendt

Betingelser

Undersøgelsestype

Observationel

Tilmelding (Forventet)

203

Kontakter og lokationer

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

Studiesteder

  • Canada
    • Ontario
      • Hamilton, Ontario, Canada, L8N 4A6
        • St. Joseph's Healthcare Hamilton
      • Hamilton, Ontario, Canada, L8N 3Z5
        • McMaster University Medical Centre

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

Kvinde

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Consecutive pregnant women with prior VTE diagnosed with accurate testing.

Beskrivelse

Inclusion Criteria:

  • Confirmed pregnancy (positive serum or urine)
  • At least 18 years of age
  • History of one prior episode of VTE consisting of DVT (diagnosed by compression ultrasonography [CUS] or venography) and/or PE (diagnosed by ventilation-perfusion [V/Q] lung scintigraphy, computed tomographic pulmonary angiography [CTPA], or traditional pulmonary angiography)

Exclusion Criteria:

  • Ongoing need for therapeutic anticoagulation for prevention or treatment of cardioembolic stroke
  • Known high-risk thrombophilia (specifically antithrombin deficiency, protein S deficiency, protein C deficiency, homozygosity for the factor V Leiden or prothrombin G20210A mutations, antiphospholipid antibody or compound abnormalities)
  • VTE within 3 months of the current pregnancy
  • Clinical risk factor for initial episode of VTE, if present, not resolved (excluding pregnancy)
  • Known contraindication to anticoagulation (including active, uncontrolled bleeding or major bleed within the previous 4 weeks)
  • For patients with prior unprovoked VTE, contraindication to LMWH (including allergy, HIT, impaired renal function, osteoporosis)
  • Geographic or social factors precluding follow-up
  • Inability or unwillingness to provide informed consent

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
Prior VTE minor transient risk factor
Pregnant women with a single prior VTE episode that was either unprovoked or associated with a minor transient risk factor - Prophylaxis with fixed-dose LMWH
Prior VTE major transient risk factor
Pregnant women with a single prior VTE episode that was provoked by a major transient risk factor - Surveillance

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Symptomatic venous thromboembolism
Tidsramme: antepartum period (expected average 7 months)
Symptomatic objectively confirmed recurrent VTE, including proximal DVT, non-fatal PE, and fatal PE during antepartum period
antepartum period (expected average 7 months)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Symptomatic recurrent venous thromboembolism
Tidsramme: antepartum period (expected average 7 months) and first 3 months postpartum
Symptomatic recurrent VTE antepartum and within first 3 months postpartum
antepartum period (expected average 7 months) and first 3 months postpartum
Symptomatic recurrent pulmonary embolism
Tidsramme: antepartum period (expected average 7 months) and first 3 months postpartum
Symptomatic objectively confirmed recurrent PE antepartum and within first 3 months postpartum
antepartum period (expected average 7 months) and first 3 months postpartum
Thrombocytopenia or heparin-induced thrombocytopenia (HIT)
Tidsramme: antepartum period (expected average 7 months)
Thrombocytopenia or HIT during antepartum period
antepartum period (expected average 7 months)
Symptomatic osteoporosis
Tidsramme: antepartum period (expected average 7 months) and first 3 months postpartum
Symptomatic osteoporosis antepartum and within first 3 months postpartum
antepartum period (expected average 7 months) and first 3 months postpartum
Other complications
Tidsramme: antepartum (expected average 7 months) and within first 3 months postpartum
Other complications sufficient to stop treatment (e.g., local and systemic reactions) antepartum and within first 3 months postpartum
antepartum (expected average 7 months) and within first 3 months postpartum
Pregnancy complications and outcomes
Tidsramme: antepartum period (expected average 7 months)
Pregnancy complications and outcomes including fetal death, pre-eclampsia, toxemia, intrauterine growth restriction, prematurity during antepartum period
antepartum period (expected average 7 months)
Fetal anomalies
Tidsramme: antepartum (expected average 7 months) and during first 3 months postpartum
Fetal anomalies
antepartum (expected average 7 months) and during first 3 months postpartum
Major and minor bleeding
Tidsramme: antepartum (expected average 7 months)
Major and minor bleeding
antepartum (expected average 7 months)

Samarbejdspartnere og efterforskere

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

Sponsor

Hamilton Health Sciences Corporation

Samarbejdspartnere

St. Joseph's Healthcare Hamilton

Efterforskere

  • Ledende efterforsker: Shannon M Bates, MD, McMaster University Medical Centre

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. september 2011

Primær færdiggørelse (Forventet)

1. september 2013

Studieafslutning (Forventet)

1. september 2014

Datoer for studieregistrering

Først indsendt

19. maj 2011

Først indsendt, der opfyldte QC-kriterier

20. maj 2011

Først opslået (Skøn)

23. maj 2011

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

3. juni 2011

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

2. juni 2011

Sidst verificeret

1. juni 2011

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • HHS130511

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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