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2015 ; 16
(ä): 343
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Benefits of an expanded use of plasma exchange for anti-neutrophil cytoplasmic
antibody-associated vasculitis within a dedicated clinical service
#MMPMID26552432
Dhaun N
; Saunders A
; Bellamy CO
; Gallardo RM
; Manson L
; Kluth DC
BMC Musculoskelet Disord
2015[Nov]; 16
(ä): 343
PMID26552432
show ga
BACKGROUND: Current recommendations for ANCA-associated vasculitis (AAV) support
its management within a dedicated clinical service. Therapies for AAV are
imperfect with many patients failing to achieve disease control and others
experiencing disease relapse. Plasma exchange (PEX) may be beneficial especially
when the kidney is involved. METHODS: Within a new, dedicated service we
retrospectively assessed, over a 6-year period, the benefits of PEX in two
patient cohorts, discriminated by PEX treatment alone. Patients received PEX
alongside standard of care if they fulfilled any of the following criteria: 1.
serum creatinine >500 ?mol/l or dialysis-requiring renal failure, 2. alveolar
haemorrhage, 3. renal biopsy showing ?30 % focal and necrotising
lesions?±?cellular crescents. Outcome measures included disease remission and
relapse, cumulative immunosuppression, and morbidity and mortality. RESULTS: Of
104 new patients, 58 patients received PEX at presentation, 46 did not.
Cyclophosphamide and/or rituximab dosing was similar for both groups. Although
patients receiving PEX had poorer renal function, a higher C-reactive protein and
disease activity score at presentation disease remission rate was similar in both
groups (no PEX vs. PEX: 96 % vs. 98 %). The PEX group entered remission quicker
(no PEX vs. PEX: 3.9?±?4.0 vs. 2.8?±?1.3 months, p?0.05), with a lower 3-month
cumulative glucocorticoid dose (no PEX vs. PEX: 2.5?±?0.4 vs. 2.3?±?0.2 g,
p?0.001). Relapse was similar between groups but adverse events lower in the
PEX group. CONCLUSIONS: PEX may be of benefit in AAV. Larger, longer randomised
controlled trials are now needed.