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Russell viper venom time (RVVT)

Indications: 1) suspected factor VII deficiency with prolonged PT, but normal aPTT & thrombin time; normal RVVT suggests factor VII deficiency 2) part of a screening panel for antiphospholipid antibodies; RVVT should be prolonged in the presence of antiphospho- lipid antibodies Notes: - Russell viper venom activates factor X directly.

Specific

dilute Russell viper venom time (dRVVT)

General

clinical hematology test

References

  1. Medical Knowledge Self Assessment Program (MKSAP) 11, American College of Physicians, Philadelphia 1998
  2. Clinical Diagnosis & Management by Laboratory Methods, 19th edition, J.B. Henry (ed), W.B. Saunders Co., Philadelphia, PA. 1996, pg 736
  3. Panel of 12 tests Laboratory Test Directory ARUP: 30181
  4. Panel of 16 tests Laboratory Test Directory ARUP: 30268
  5. Panel of 3 tests Laboratory Test Directory ARUP: 30461
  6. Panel of 16 tests Laboratory Test Directory ARUP: 2003222