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Monitoring protocol after recovery from an episode of acquired, autoimmune TTP

Monitoring protocol after recovery from an episode of acquired, autoimmune TTP
  Therapy Monitoring Routine care Comments
First week
  • Continue glucocorticoids
  • Continue rituximab
  • Assess symptoms
  • CBC every two to three days
  • Removal of central venous catheter
  • The highest risk of exacerbation is during the first week.
  • Exacerbations are treated with PEX, glucocorticoids, and rituximab.
First month
  • Taper and discontinue glucocorticoids
  • Complete rituximab
  • Assess symptoms
  • CBC weekly, then every other week
  • ADAMTS13 activity weekly
  • Provision of wallet card/letter
  • Resumption of normal activities
First and second year  
  • ADAMTS13 activity every three months
  • Return to primary care clinician
  • Updating of vaccinations
  • Seek medical attention (and immediate CBC) for any return of symptoms
  • The risk of relapse is greater during the first two years and greater for those with ADAMTS13 <10% (ie, risk of 20 to 30%), but relapse may not occur imminently (median time to relapse: 5 to 9 years).
  • For ADAMTS13 <20%, prophylactic rituximab as a single dose followed by retesting of ADAMTS13 is reasonable.
  • For frequent relapses with persistent severe ADAMTS13 activitiy <20%, splenectomy, maintenance rituximab once every 3 months for 2 to 3 years, or other immunosuppressive agents are reasonable options.
Subsequent years  
  • ADAMTS13 activity annually
  • Routine primary care
  • Annual hematologist visit
  • Monitoring for and treatment of long-term complications of TTP
  • Seek medical attention (and immediate CBC) for any return of symptoms
The optimal approach to monitoring patients after recovery from an episode of acute TTP is evolving, and the interventions to reduce the risk of relapse are an area of active investigation. Judgment of a clinician with experience in managing TTP is required. Refer to UpToDate for details.
TTP: thrombotic thrombocytopenia purpura; CBC: complete blood count; PEX: plasma exchange.
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