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CompletedNCT00345618CASSIOPEAUpdated Mar 21, 2016

Clinical Study Assessing Idrabiotaparinux Sodium Injections Once-weekly in Pulmonary Embolism Therapeutic Approach

A Phase 3 interventional study of Idrabiotaparinux sodium and Warfarin in Embolism and Thrombosis, sponsored by Sanofi. Completed at 38 sites in 38 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2016-03-21.

Sponsored by Sanofi · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
3,202
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

Objectives are to evaluate whether idrabiotaparinux sodium (SSR126517E) is as least as effective as a standard warfarin treatment to prevent recurrence of venous thromboembolic events (VTE) in patients with symptomatic pulmonary embolism (PE) with or without symptomatic deep venous thrombosis (DVT) and to assess its safety (bleedings) versus warfarin.

Read the detailed description

Treatment with a therapeutic dose of any low molecular weight heparin (LMWH) or unfractioned heparin (UFH) or fondaparinux is allowed only within the 36 hours immediately preceding randomization. Randomization is performed as soon as the diagnosis of PE (and DVT if concomitant suspected symptomatic DVT) is confirmed.

Allocation to treatment is done centrally by Interactive Voice Response System (IVRS) and stratified by (1) center, (2) intended treatment duration, ie, 3 months or 6 months. At randomization, the planned duration of treatment (3 or 6 months) is prespecified by the Investigator and determined on the assessment of risk of VTE recurrence. Participants are randomized to either idrabiotaparinux + placebo of warfarin, or warfarin + placebo of idrabiotaparinux, with an initial treatment of at least 5 days with enoxaparin in both treatment groups.

Participants in the 3-month stratum have an additional 13-week observational period after cessation of study treatment. Participants in the 6-month stratum have a 13-week up to 26-week observational period.

02

Conditions studied

  • Embolism
  • Thrombosis

Keywords

  • Deep venous thrombosis
  • pulmonary embolism
  • anticoagulant drugs
03

In context

Pulmonary Embolism

739 studies on the registry are indexed under Pulmonary Embolism; 158 are open to participants now.

This study's enrollment of 3,202 is above the median of 150 across 381 interventional studies indexed under Pulmonary Embolism.

Browse Pulmonary Embolism studies →

Lead sponsor

Sanofi is the lead sponsor of 1,508 studies on the registry; 90 are open to participants now.

Of its 198 completed or terminated interventional studies of FDA-regulated products, 118 (60%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Symptomatic pulmonary embolism with or without symptomatic deep vein thrombosis

Exclusion criteria

Exclusion Criteria:

  • End stage renal failure, hepatic failure, uncontrolled hypertension;
  • Active bleeding or high risk for bleeding;
  • Pregnancy or childbearing potential without proper contraceptive measures, threatened abortion.
  • Breastfeeding.
  • Known allergy to idraparinux or idrabiotaparinux, avidin or egg proteins;
  • hypersensitivity to warfarin, enoxaparin, heparin or pork product; or any other contraindication listed in the labelling of warfarin or enoxaparin;
  • Indication of prolonged anticoagulation therapy for other reason than PE;
  • Life expectancy \< 6 months;
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
3,202 participants (actual)

Study arms

  • Experimental
    Idrabiotaparinux

    Idrabiotaparinux sodium, 3.0 mg, once-weekly for 3 or 6 months depending on the stratum, after enoxaparin, 1.0 mg/kg, every 12 hours for at least 5 days. Avidin, 100 mg, at the discretion of the investigator whenever deemed appropriate and possible (ie, life-threatening bleeding, emergency invasive procedure with the potential of uncontrolled bleeding, or over-dosage).

    Drug: Idrabiotaparinux sodium · Drug: Avidin · Drug: Placebo (for warfarin) · Drug: Enoxaparin

  • Active comparator
    Warfarin

    Warfarin, INR-adjusted dose, started 24 hours after the start of enoxaparin, 1.0 mg/kg, every 12 hours for at least 5 days, and continued for 3 or 6 months depending on the stratum. Avidin, 100 mg, at the discretion of the investigator whenever deemed appropriate and possible (ie, life-threatening bleeding, emergency invasive procedure with the potential of uncontrolled bleeding, or over-dosage).

    Drug: Warfarin · Drug: Placebo (for idrabiotaparinux sodium) · Drug: Avidin · Drug: Enoxaparin

Interventions

  • DrugIdrabiotaparinux sodium

    0.5 mL pre-filled syringe for 3.0 mg Subcutaneous injection

    Also known as: Biotinylated Idraparinux, SSR126517

  • DrugWarfarin

    Capsules with 1 or 5 mg for INR-adjusted dose (INR checked at least once a month) Oral administration

  • DrugPlacebo (for idrabiotaparinux sodium)

    0.5 mL pre-filled syringe Subcutaneous injection

  • DrugAvidin

    100 mg in 10 mg/mL solution Intravenous infusion for 30 minutes

    Also known as: SSR29261

  • DrugPlacebo (for warfarin)

    Warfarin matching capsules Oral administration

  • DrugEnoxaparin

    Prefilled syringes as locally registered Subcutaneous injection

06

What researchers measure

Primary outcomes

  1. Recurrence of symptomatic, fatal or not, VTE (PE or DVT) as confirmed by a Central Independent Adjudication Committee (CIAC)

    Time frame: 3 months

Secondary outcomes

  1. Recurrence of symptomatic, fatal or not, VTE (PE or DVT) as confirmed by a Central Independent Adjudication Committee (CIAC)

    Time frame: 6 months

  2. Incidence of any clinically relevant bleeding as classified by the CIAC (ie, major bleeding and other clinically relevant non major bleeding)

    Time frame: 3 months, 6 months and 3- to 6-month post-treatment follow-up

07

Study locations

38 sites
  • Sanofi-Aventis Administrative Office
    Bridgewater, New Jersey 08807, United States
  • Sanofi-Aventis Administrative Office
    Buenos Aires, Argentina
  • sanofi-aventis Australia & New Zealand administrative office
    Macquarie Park, New South Wales, Australia
  • Sanofi-Aventis Administrative Office
    Wien, Austria
  • Sanofi-Aventis Administrative Office
    Minsk, Belarus
  • Sanofi-Aventis Administrative Office
    Diegem, Belgium
  • Sanofi-Aventis Administrative Office
    Sao Paulo, Brazil
  • Sanofi-Aventis Administrative Office
    Sofia, Bulgaria
  • Sanofi-Aventis Administrative Office
    Laval, Canada
  • Sanofi-Aventis Administrative Office
    Santiago, Chile
  • Sanofi-Aventis Administrative Office
    Shangai, China
  • Sanofi-Aventis Administrative Office
    Santafe de Bogota, Colombia
  • Sanofi-Aventis Administrative Office
    Zagreb, Croatia
  • Sanofi-Aventis Administrative Office
    Praha, Czech Republic
  • Sanofi-Aventis Administrative Office
    Horsholm, Denmark
  • Sanofi-Aventis Administrative Office
    Cairo, Egypt
  • Sanofi-Aventis Administrative Office
    Tallinn, Estonia
  • Sanofi-Aventis Administrative Office
    Paris, France
  • Sanofi-Aventis Administrative Office
    Athens, Greece
  • Sanofi-Aventis Administrative Office
    Mumbai, India
  • Sanofi-Aventis Administrative Office
    Natanya, Israel
  • Sanofi-Aventis Administrative Office
    Milano, Italy
  • Sanofi-Aventis Administrative Office
    Mexico, Mexico
  • Sanofi-Aventis Administrative Office
    Gouda, Netherlands
  • Sanofi-Aventis Administrative Office
    Lysaker, Norway
  • Sanofi-Aventis Administrative Office
    Lima, Peru
  • Sanofi-Aventis Administrative Office
    Makati City, Philippines
  • Sanofi-Aventis Administrative Office
    Warszawa, Poland
  • Sanofi-Aventis Administrative Office
    Porto Salvo, Portugal
  • Sanofi-Aventis Administraive Office
    Puerto Rico, Puerto Rico
  • Sanofi-Aventis Admnistrative Office
    Moscow, Russian Federation
  • Sanofi-Aventis Administrative Office
    Brastislava, Slovakia
  • Sanofi-Aventis Administrative Office
    Midrand, South Africa
  • Sanofi-Aventis Administrative Office
    Barcelona, Spain
  • Sanofi-Aventis Administrative Office
    Bromma, Sweden
  • Sanofi-Aventis Administrative Office
    Istanbul, Turkey
  • Sanofi-Aventis Administrative Office
    Kiev, Ukraine
  • Sanofi-Aventis Administrative Office
    Guildford Surrey, United Kingdom
08

References and documents

Publications

  • Buller HR, Gallus AS, Pillion G, Prins MH, Raskob GE; Cassiopea Investigators. Enoxaparin followed by once-weekly idrabiotaparinux versus enoxaparin plus warfarin for patients with acute symptomatic pulmonary embolism: a randomised, double-blind, double-dummy, non-inferiority trial. Lancet. 2012 Jan 14;379(9811):123-9. doi: 10.1016/S0140-6736(11)61505-5. Epub 2011 Nov 28. PubMed 22130488 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 21, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00345618
Lead sponsor
Sanofi
Responsible party
Sponsor
First posted
Jun 28, 2006
Start date
Jun 2006
Primary completion
Oct 2010
Completion
Oct 2010
Last update
Mar 21, 2016

Study contacts

ICD CSD
study director · Sanofi

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2016. You cannot join it, but the record below documents what was studied.

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