Table 1.

Probable causes for the development of Red Blood Cell Hemolysis.

In vivo	Bacteria
	Parasites
	Genetic and autoimmune disorders
Device	Aspiration needle lumen size
	Needle tip and site hole design and surface area
	BMA centrifugation protocols with high g-forces
	Surrounding marrow and platelet tissue activation
	Device causing turbulence during aspirate collection
	High erythrocyte count in aspirate
Physician	Incorrect aspiration technique
	Excessive syringe suction creating high shear forces
	Prolonged storage
	Inappropriate, small, needle size
	Forceful transfer from syringe into the concentrating tube
	High viscosity of injectate