Capillary blood drawing device
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United States of America Patent
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-
Jun 8, 1993
Issued Date -
N/A
app pub date -
Jun 9, 1992
filing date -
Jun 9, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compact, efficient and disposable capillary blood drawing device by which a patient's tissue can be punctured and a blood sample collected by the same reliable device. The blood drawing device includes the integral connection of a solid core needle and a spring in which potential energy is initially stored. A release of the potential energy from the spring correspondingly causes the needle to be driven into contact with the patient's tissue to make a puncture therein. When the spring assumes an at rest position, the needle will be safely withdrawn in and shielded by the blood drawing device to avoid an accidental needle stick and the possible spread of disease. The blood drawing device also includes a flexible bladder in which blood from the puncture can be collected, under suction, and selectively expulsed, under compression, for medical examination and diagnostic purposes.
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