Table 1.

Sub Classification of Platelet Aggregation Defects

	ADP	Epinephrine	Collagen	Ristocetin
Epinephrin Receptor Defect,	N	↓	N	N
Glanzman's Thrombasthenia,	↓	↓	↓	N or ↓
Bernard Soulier Syndrome	N	N	N	↓ or Abs
ADP Receptor Defect,	↓	N	N	N
Collagen Receptor Defect.	N	N	↓ or Abs	N
Unclassified	↓ or Abs	↓ or Abs	N	N

ADP- adenosine diphosphate; N - Normal; ↓ - Decrease; Abs - Absent