The only apparatus required in this method is a 20-c.c. ground glass syringe with a needle 2 or 3 inches long.
After sterilization of the syringe and needle, 2 c.c. of a 10 per cent. sodium citrate solution is drawn into it. The needle is then inserted into the vein of the donor, the syringe filled and withdrawn. The anterior fontanel region of the infant having been previously cleaned with alcohol and tincture of iodin, the needle is pushed into the superior longitudinal sinus and the syringe emptied. This may be repeated several times if necessary. A smaller needle than the one for the sinus may be used on the vein of the donor if desired.
For entering the sinus the needle is inserted at the superior angle of the fontanel at an angle of about 25 degrees with the scalp. When the needle enters the sinus there is a