Therapeutic Plasma Exchange in Thailand: A 10‐Year Retrospective Analysis

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BACKGROUND: Therapeutic plasma exchange (TPE) is a cornerstone of therapeutic apheresis across multiple subspecialties. While international registries have described global practice, nationwide data from Thailand are lacking. METHODS: We conducted a 10-year retrospective analysis of all TPE admissions reimbursed under Thailand's Universal Health Coverage scheme (2014-2023). Cases were identified using ICD-9 code 997.1. Demographics, clinical indications, complications, outcomes, and costs were extracted from discharge records. Indications were categorized according to the 2023 American Society for Apheresis (ASFA) guidelines. RESULTS: A total of 5884 admissions were identified. The mean age was 46.4 ± 20.6 years, 58.0% were male, and 13.0% were pediatric. TPE Utilization increased from the mid-200s in 2014 to nearly 900 admissions in 2023. Neurological (28.9%) and nephrological (24.4%) disorders were the leading subspecialties. Systemic lupus erythematosus (12.4%), septic shock (12.1%), and acute inflammatory demyelinating polyradiculoneuropathy (9.1%) were the most frequent disease-specific indications. Nearly three-quarters of procedures were guideline-supported (Category I: 28.6%, Category II: 31.7%), while Category III use was 28.1% in our cohort. In-hospital mortality was 51.6% overall, driven largely by septic shock and acute liver failure, whereas survival exceeded 70% in autoimmune neurologic diseases and transplant recipients. Complications included bleeding (25.5%), transfusion requirements (69.0%), and hypocalcemia (9.7%). The actual cost per admission ranged USD 4000-12000, while reimbursement covered USD 2000-7000. CONCLUSION: This first nationwide analysis of TPE in Thailand highlights increasing utilization, high-cost burden, and important differences from global practice. Strengthening registries, refining coding systems, and developing region-specific guidelines will be critical to optimize outcomes and sustainability.

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