Related Experiment Video
Updated: Jun 4, 2026

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
Published on: September 9, 2012
A study of reported factor IX use around the world
J S Stonebraker1, P H B Bolton-Maggs, M Brooker
1North Carolina State University, College of Management, Raleigh, NC 27695-7229, USA. jeff_stonebraker@ncsu.edu
Factor IX (FIX) concentrate usage varies significantly by country, increasing with economic capacity. This trend suggests a future rise in FIX concentrate use for hemophilia B treatment.
Area of Science:
- Hematology
- Public Health
- Health Economics
Background:
- Hemophilia B treatment relies on replacement therapy with Factor IX (FIX) concentrates.
- Understanding global FIX usage patterns is crucial for optimizing patient care and resource allocation.
Purpose of the Study:
- To analyze reported Factor IX (FIX) concentrate usage across 90 countries.
- To investigate the relationship between national economies and FIX utilization.
Main Methods:
- Data on international units (IUs) of FIX used were collected from the Marketing Research Bureau and World Federation of Hemophilia.
- Analysis focused on country-by-country usage and per capita/per person metrics.
Main Results:
- Reported FIX use shows considerable variation across national economies, including high-income countries.
- FIX usage correlates positively with economic capacity and has increased over time.
- Consumption growth is more rapid in high-income nations, indicating widening disparities in hemophilia care.
Conclusions:
- FIX concentrate consumption is projected to increase globally, particularly in high-income countries.
- Metrics like IUs per capita and per person offer a comprehensive view of hemophilia care levels.
- Improved data collection and surveillance are vital for identifying patient needs and best practices in hemophilia B treatment.
Related Concept Videos
Therapeutic Drug Monitoring: Affecting Factors
Factors Affecting Drug Response: Overview
Factors Affecting Drug Distribution: Miscellaneous Factors
Age plays a significant role due to differences in body composition among different age groups. Infants, for instance, have a higher proportion of total body water and lower albumin levels, a protein that binds drugs in the bloodstream. This unique composition in infants enhances the...
Factors Affecting Illness
For instance, risk factors are connected to illness, disability,...
Biopharmaceutical Factors Influencing Drug Product Design: Overview
Factors Affecting Protein-Drug Binding: Drug-Related Factors
One crucial factor in drug-protein binding is the drug's lipophilicity or its affinity for fat. More lipophilic drugs tend to have higher binding extents. For example, highly lipophilic drugs like cloxacillin exhibit substantial protein binding, with as much as 95% of the drug binding to proteins. In contrast,...

