BLOOD PRESERVATION TECHNIC
In Collaboration with Dr. Elizabeth H. SchirmerThe blood bank1 has now been in operation at the Cook County Hospital long enough for it to demonstrate its practical value as well as to reveal certain facts regarding the care that must be exercised in the preparation and administration of this blood, some of the limitations connected with its use, and some of the contraindications.A new departure has been inaugurated in the direction of the securing and preserving of convalescents' serum. This can be done without sacrificing the red blood corpuscles, which may be separated from the plasma by sedimentation. They may then be suspended in sterile physiologic solution of sodium chloride and employed as "erythrocyte suspension," which we believe is especially indicated in cases of anemia in which there is no marked deficiency of plasma proteins and it should also be of special value in