Effective prophylaxis with rFVIIa in young haemophiliacs with inhibitors using a schedule similar to FVIII prophylaxis in non-inhibitor patients

María Fernanda López-Fernández, Carmen Altisent, Víctor Jiménez-Yuste, Faustino García-Candel, Carmen Sedano, Ana Cid, Eva Mingot, Ramiro Núñez, María José Paloma, Inmaculada Soto, Manuel Prieto

Congenital Coagulophaties Unit, Hospital Universitario La Fe, Valencia, Spain.
Haematology, Complejo Hospitalario Universitario A Coru?a, A Coru?a, Spain.
Haematology, Complejo Hospitalario Universitario Marques de Valdecilla, Santander, Spain.
Haematology, Hospital General de Asturias, Oviedo, Spain.
Haematology, Hospital General Yagüe, Burgos, Spain.
Haematology, Hospital Universitario Carlos Haya, Málaga, Spain.
Haematology, Hospital Universitario Virgen del Rocío, Sevilla, Spain.
Haematology, Hospital Virgen del Camino, Pamplona, Spain.
Haemophilia Unit, Hospital Universitario Vall d’Hebron, Barcelona, Spain.
Haemophilia Unit, Hospital Universitario Virgen de la Arreixaca, Murcia, Spain.
Haemophilia Unit, Hospital Universitario, Madrid, Spain.

DOI: 10.4236/health.2013.57155                

Abstract

Objective: To assess the role of early prophylaxis with recombinant activated factor VII (rFVIIa) in young haemophiliacs with inhibitors and to determine whether it can reduce bleeding episodes and prevent joint damage. Patients and Methods: Ten severe haemophiliacs, less of three years old, with up to four joint bleeds and inhibitors to FVIII who started early prophylaxis with rFVIIa, were included. A number of haemorrhages/year/patient and haemarthroses/ year/patient were compared before the start of prophylaxis, which include both the time before (initial period) and after inhibitor diagnosis (inhibitor period), with those during prophylaxis (prophylaxis period). Results: The mean time of inhibitor diagnosis was 15.6 months (range: 2.3-34.1). The mean time between inhibitor diagnosis and the start of prophylaxis was 7.1 months (range: 0-23.2), shorter than the time of rFVIIa prophylaxis (mean: 10.3 months; range: 4.1-32.0). Bleeding episodes for the three time periods were 45, 36 and 17, respectively, or 0.29 and 0.51 haemorrhages/year/patient in the two periods prior to prophylaxis compared to 0.17 during prophylaxis. Total haemarthroses for the three-time periods were 7, 5 and 5, respectively. The haemarthroses/year/patient in the pre-prophylaxis period were 0.032 and 0.070, compared to0.049 inthe prophylaxis period. rFVIIa schedules were either 90 μg/kg three times weekly or 90 μg/kg daily. Conclusions: Early prophylaxis with rFVIIa may be efficacious in young haemophiliacs with inhibitors, reducing joint bleeds. After the risky period of inhibitor presence, they are able to continue rFVIII prophylaxis with success assured to prevent arthropathy.

Keywords

rFVIIa; Haemarthroses; Haemophilia; Inhibitors; Prophylaxis

Conflicts of Interest

The authors declare no conflicts of interest.

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