Which is the best schedule of autologous blood storage for preoperative adolescent idiopathic scoliosis patients?

Table 2 Grading of VVR

	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

ISSN: 2397-1789