Study of Voncento® in Subjects With Von Willebrand Disease

CSL Behring26 enrolled

Overview

This is a multi-centre, open-label, single-arm, phase 4, post-marketing study to further investigate the efficacy and safety of Voncento in subjects with Von Willebrand Disease (VWD) in whom treatment with a Von Willebrand Factor (VWF) product is required as on-demand therapy, for prophylactic therapy, or during surgery. Subjects will be treated with Voncento either as an on-demand regimen (eg, to treat a non-surgical spontaneous or traumatic bleeding event) or prevention regimen (eg, to prevent an anticipated bleeding event) at a dose prescribed by the Investigator in accordance with the Voncento Summary of Product Characteristics (SmPC), or with a prophylaxis regimen (regular treatment with Voncento at a frequency of 1-3 times per week). Voncento will also be given to prevent and treat any surgical bleeding events.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Von Willebrand Disease

Interventions

Eligibility

Sex: ALL

Medical Language ↔ Plain English

Inclusion Criteria: * Diagnosis of severe type 1, 2A, or 3 VWD where Von Willebrand Factor: Ristocetin Cofactor (VWF:RCo) is \<20% at screening * Desmopressin acetate treatment is ineffective, contraindicated, or not available for subject (type 3 VWD subjects only). * Evidence of vaccination against hepatitis A and B or presence of antibodies against hepatitis A and B due to either a previous infection or prior immunization. * Written informed consent given. * Require a VWF product to control a non-surgical bleeding (NSB) event or for ongoing prophylactic therapy. Exclusion Criteria: * Known history or suspicion of having VWF or FVIII inhibitors * Acute or chronic medical condition, other than VWD, which may affect the conduct of the study * Known or suspected hypersensitivity or previous evidence of severe side effects to Voncento, VWF / FVIII concentrates, or human albumin. * Participated in another interventional clinical study within 30 days before the first administration of Voncento or at any time during the study. * Females who are pregnant, breast-feeding or who have a positive pregnancy test at screening * Alcohol, drug, or medication abuse within 1 year before the study. * Currently receiving a therapy not permitted during the study. * Previous participation in a Voncento / Biostate study.

Locations (12)

Study Site

Vienna, Austria

Study Site

Duisburg, Germany

Study Site

Frankfurt, Germany

Study Site

Athens, Greece

Study Site

Krakow, Poland

Study Site

Rzeszów, Poland

Study Site

Wroclaw, Poland

Study Site 14

London, United Kingdom

Study Site 40

London, United Kingdom

Study Site 42

London, United Kingdom

...and 2 more locations

Outcomes

Primary Outcomes

Haemostatic efficacy - NSB event

Subject's and investigator's assessment of haemostatic efficacy of Voncento in its usage for a non-surgical bleeding (NSB) event. Assessments of haemostatic efficacy will be based on a 4-point ordinal scale of Excellent, Good, Moderate or None.

Time frame: Assessed daily by the subject until the bleed stops, for the duration of the subject's participation in the study (approximately 12 months). Each bleeding event is also to be assessed retrospectively by the Investigator.

Number of infusions - NSB event

Number of infusions of Voncento required to treat an NSB event.

Time frame: For the duration of the subject's participation in the study (approximately 12 months).

Total dose of Voncento - NSB event

Total dose of Voncento (in international units of Von Willebrand Factor: Ristocetin Cofactor) required to treat an NSB event.

Time frame: For the duration of the subject's participation in the study (approximately 12 months).

Number of NSB events per month

Time frame: From Day 1 until final study visit, approximately 12 months.

Annual bleeding rate

The number of bleeding events per year

Time frame: For the duration of the subject's participation in the study (approximately 12 months).

Secondary Outcomes

Assessment of blood loss during a surgical procedure

Time frame: During surgery, for any surgical procedure during the subject's participation in the study (approximately 12 months).

Haemostatic efficacy - surgical event

Investigator's or surgeon's assessment of haemostatic efficacy of Voncento in its usage for a surgical bleeding event. Assessments of haemostatic efficacy will be based on a 4-point ordinal scale of Excellent, Good, Moderate or None.

Time frame: Assessed during and after surgery until the bleeding stops, for any surgical procedure during the subject's participation in the study (approximately 12 months).

Number of infusions - surgical bleeding event

Number of infusions of Voncento required to treat a surgical bleeding event.

Time frame: For the duration of the subject's participation in the study (approximately 12 months).

Total dose of Voncento - surgical bleeding event

Total dose of Voncento (in international units of Von Willebrand Factor: Ristocetin Cofactor) required to treat a surgical bleeding event.

Time frame: For the duration of the subject's participation in the study (approximately 12 months).

Overall adverse events

Overall number of subjects with: adverse events (AEs), serious AEs, AEs related to Voncento administration, and adverse events of special interest.

Time frame: From Day 1 until the final study visit for each subject (approximately 12 months)

Number of subjects with VWF or FVIII inhibitors

Time frame: At screening, Day 1 and approximately Months 3, 6, 9 and 12, for each subject.

Haemostatic efficacy - prophylaxis

Subject's and investigator's assessment of haemostatic efficacy of Voncento as prophylaxis therapy. Assessments of haemostatic efficacy will be based on a grading scale with outcomes of excellent, good, moderate, none.

Time frame: Approximately every month (subject assessment) and every 3 months (Investigator assessment) for the duration of the subject's participation in the study (approximately 12 months).