An Observational Post-Authorization Safety and Effectiveness Study of Ravulizumab in Adult Patients Aged 18 and Older Diagnosed With Paroxysmal Nocturnal Hemoglobinuria Using Multicenter Electronic Medical Records in South Korea (ESR-25-22871)
This multicenter, retrospective observational cohort study aims to evaluate the long-term real-world effectiveness and safety of ravulizumab in adult patients with Paroxysmal Nocturnal Hemoglobinuria (PNH) in South Korea over a 4-year post-marketing period. By analyzing electronic medical records (EMR) from participating institutions, the study investigates intravascular hemolysis control, transfusion avoidance, breakthrough hemolysis (BTH) characteristics, and overall clinical outcomes in an Asian population.
Study Overview
Status
Conditions
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Locations
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Seoul, South Korea
- Yonsei University College of Medicine
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Korean patients with Paroxysmal Nocturnal Hemoglobinuria whose retrospective clinical data are available in the electronic medical records (EMR) of the participating hospitals.
Description
Inclusion Criteria:
- Adult patients (18 years of age or older) with a confirmed diagnosis of Paroxysmal Nocturnal Hemoglobinuria (PNH) documented by flow cytometry.
- Patients who initiated ravulizumab treatment on or before February 28, 2025, and have at least 6 months of follow-up data available.
- To reflect real-world clinical practice, meningococcal (Neisseria meningitidis) vaccination status will be collected if available, but is not a mandatory requirement for study inclusion.
Exclusion Criteria:
- Less than 18 years of age at the time of ravulizumab treatment initiation.
- Known hypersensitivity to ravulizumab or any of its excipients.
- Untreated Neisseria meningitidis infection at the time of ravulizumab treatment initiation.
- Prior or concomitant use of other complement inhibitors for PNH (with the exception of prior eculizumab use).
Study Plan
How is the study designed?
Design Details
- Observational Models: COHORT
- Time Perspectives: RETROSPECTIVE
Cohorts and Interventions
Group / Cohort |
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PNH patients treated with Ravulizumab
Patients diagnosed with PNH and prescribed Ravulizumab at multiple centers in South Korea, whose electronic medical records (EMR) are available for retrospective review. |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
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Proportion of patients achieving lactate dehydrogenase (LDH) levels less than or equal to 1.5 times the upper limit of normal (ULN)
Time Frame: Up to 4 years after ravulizumab initiation
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Assessment of intravascular hemolysis control, defined as achieving and maintaining serum LDH levels at or below 1.5 times the ULN during the 4-year post-marketing observation period. |
Up to 4 years after ravulizumab initiation
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
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Incidence and clinical characteristics of breakthrough hemolysis (BTH)
Time Frame: hroughout the follow-up period, assessed at each occurrence of a BTH event (up to 4 years)
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BTH is defined as at least one new or worsening symptom or sign of intravascular hemolysis (fatigue, hemoglobinuria, abdominal pain, dyspnea, anemia [hemoglobin less than 10 g/dL], major adverse vascular events [MAVE, including thrombosis], dysphagia, or erectile dysfunction) in the presence of elevated lactate dehydrogenase (LDH) levels of at least 2 times the upper limit of normal (ULN), after prior reduction of LDH to less than 1.5 times the ULN during therapy. Associated contextual factors, including complement-amplifying conditions, hospitalizations, transfusions, and the use of rescue medication, will also be recorded and characterized at each event. |
hroughout the follow-up period, assessed at each occurrence of a BTH event (up to 4 years)
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Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 4-2026-0786
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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