The normal time it takes platelets to clump depends on temperature and may vary from laboratory to laboratory.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What abnormal results mean
Decreased platelet aggregation may be due to:
Autoimmune disordersthat produce antibodies against platelets Bernard-Soulier syndrome Fibrin degradation products Glanzmann's thrombasthenia
- Medicines that block platelet formation
Myeloproliferative disorders Storage pool disease
Uremia(a result of kidney failure) Von Willebrand's disease
Review Date: 02/28/2011
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.