Chemistry: analytical and immunological testing – Including sample preparation
Patent
1997-12-30
2000-07-04
Ludlow, Jan
Chemistry: analytical and immunological testing
Including sample preparation
118100, 359396, 422 99, 422100, 422103, 427 211, 4352883, 436 46, 436180, G02B 2134
Patent
active
060837594
ABSTRACT:
The present invention is a blood smearing cassette that quickly, efficiently and reliably prepares peripheral blood smears. The cassette holds two glass slides, a spreader slide and a smear slide, at specific angles to each other. The blood smearing cassette allows untrained personnel to make consistent and proper blood smears. The user slips a smear slide into the smear slide receiver, and a spreader slide into the spreader slide receiver. A small amount of blood is placed on the smear slide, which is then pulled up to the spreader slide until the drop of blood is in contact with the spreader slide. The blood is allowed to spread across the bottom of the spreader slide. The smear slide is then pulled back out of the cassette, leaving a thin film of blood on the smear slide. The length and thickness of the film are controlled by varying the speed at which the smear slide is pulled and varying angles between the two slides. A mechanism may be used for connecting the spreader slide receiver to the smear slide receiver that allows various angles between the slides to be selected depending on the viscosity of the blood sample.
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Creighton Wray James
Ludlow Jan
Narasimhan Meera P.
University of Hawai'i
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