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When making routine blood examination on patients, it is necessary to have blood pipettes at hand at all times. On account of the inconvenience of carrying them, solutionstionstes are usually not at hand hand when wanted. Ihave devised a little case, which can be slipped into tthe vest pocket and be rreadyy time to make a blood-bloodcount.
It is a small leather pencilpencil-holder and red blood pipettes; a small trocar,s is found in a surgicalset, to be used for pricking the finger; two small rubber tubes, without the bone mouthpiece and two very small test-tubesiluting fluids (Fig. 1). All these parts are very easily secured and assembled, at averyveryxpense, the only item of expense being the blood pipettes.small tubes, while in the case, are either empty or may be filled with solution. If empty the diluting fluids can easily be made at the bedside by putting two or three drops
KATZENSTEIN M. A VEST-POCKETOR CASE FOR EVERYTHING NECESSARYECESSARY MAKIR MAKING A BLOOD-COUNT. JAMA. 1911;LVII(1):22. doi:10.1001/jama.1911.04260070026011