From: Which is the best schedule of autologous blood storage for preoperative adolescent idiopathic scoliosis patients?
Obligatory symptoms
Other symptoms
Grade1
blood pressure drop
pallor, cold sweats and nausea
bradycardia >40/min
Grade2
blood pressure drop <90mmHg
vomiting
bradycardia <40/min
unconsciousness
Grade3
convulsions
incontinence