Observatory of Patients With Haemophilia B Treated by IdElvion®

  • End date
    Sep 16, 2026
  • participants needed
  • sponsor
    CSL Behring
Updated on 16 January 2022


OrPHEe is a non-interventional, prospective and national study which aim is to record real life data in haemophilia B French patients treated with Idelvion® to confirm the efficacy and safety of this product established in clinical development studies.


Haemophilia B is a congenital coagulation disorder caused by a deficiency or anomaly of coagulation factor IX (FIX).

The severity of the haemophilia depends on the extent of the FIX deficiency with clinical manifestations differing depending on the location of the bleed.

Treatment of this disease involves the administration of the deficient factor, i.e. FIX, to patients. Depending on the severity of the disease and context, a range of treatment regimens are available (long-term prophylactic treatment for the prevention of non-surgical bleeds, short-term prophylactic treatment for high-risk periods, treatment for the prevention of surgical bleeds or on-demand curative treatment).

CSL Behring has developed a long-acting recombinant FIX, i.e. rIX-FP (Idelvion®), to extend the intervals between the administrations of treatment while also providing a therapeutic benefit. Data from clinical studies clearly confirm the therapeutic benefit of Idelvion® in adult and paediatric patients with haemophilia B previously receiving an on-demand treatment for bleeding episodes, for long-term prophylaxis, as well as in patients undergoing surgery.

Condition Haemophilia B
Clinical Study IdentifierNCT05086575
SponsorCSL Behring
Last Modified on16 January 2022


Yes No Not Sure

Inclusion Criteria

Have agreed to participate in the observatory after receiving written information on the purpose of the study and the personal data to be collected (agreement of parents for under-age patients)
Present with haemophilia B and are currently being treated or have previously been treated with Idelvion® as a long-term prophylactic treatment, on-demand treatment or short-term treatment for surgical procedures or to cover periods with a high-risk of bleeding
Do not have FIX targeted antibodies at the time of the inclusion visit

Exclusion Criteria

Refusal by the patient or his/her legal representative to participate in the study
Existence of a contraindication to the use of Idelvion® treatment (known hypersensitivity to FIX or hamster proteins)
Simultaneous participation in an interventional clinical study
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How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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