I would like to collect blood from a 1 day old mouse, terminal collection is fine because I also need to collect tissues. Can this be done by cardiac puncture or what method do people use to collect the blood? Can you share a protocol for this?
The common method is to cut in to the axillary blood vessels by cutting deep into the armpit with a small scissor. The blood pools in the armpit and can be collected using a heparinized glass capillary. We usually use the Pasteur pipettes that you would use to aspirate tissue culture media during feeding of cells. You can draw a small amount of heparin into the pipette the day before using and let the heparing dry into the pipette. You can use a small rubber bulb to blow the blood out of teh glass pipette into an Eppendorf tube.