Blood sampling device

Details Blood sampling device Blood sampling device

A - Human Necessities

61

B

A61B 5/15 (2006.01)

Patent

CA 2216884

An automatic blood sampling device is provided with a housing (12, 14, 18, 20), a reciprocable shaft (50) disposed in the housing (12, 14, 18, 20), and a lancet (40) operatively coupled to the shaft (50). The lancet (40) is movable between a retracted position in which the lancet (40) is disposed within the housing (12, 14, 18, 20) and an extended position in which the lancet (40) extends outside of the housing (12, 14, 18, 20). The blood sampling device includes means for retaining the lancet (40) in its retracted position, means (51) for causing the lancet (40) to automatically move from its retracted position to its extended position, and means for generating a reduced internal pressure within an area in the housing (12, 14, 18, 20) as the lancet (40) moves from its retracted position to its extended position to facilitate drawing blood from a skin puncture to be made by the lancet (40) into an interior portion of the housing (12, 14, 18, 20), the internal pressure being less than the ambient pressure outside of the housing (12, 14, 18, 20) of the sampling device.

Dispositif d'échantillonnage automatique pour le sang, avec un logement (12, 14, 18, 20), une tige réversible (50) montée dans le logement (12, 14, 18, 20), et une lancette (40) accouplée mécaniquement à la tige (50). La lancette (40) est mobile entre une position rétractée où elle (40) se trouve dans le logement (12, 14, 18, 20) et une position déployée où elle (40) sort du logement (12, 14, 18, 20). Le dispositif d'échantillonnage du sang comprend un système pour retenir la lancette (40) dans sa position rétractée (51) et pour la déplacer automatiquement de sa position rétractée à sa position déployée, ainsi qu'un système pour réduire la pression interne dans une section du logement (12, 14, 18, 20) à mesure que la lancette (40) se déplace de sa position rétractée à sa position déployée, ce qui facilite l'extraction de sang par la lancette (40) à travers la peau jusque dans une section interne du logement (12, 14, 18, 20), la pression interne étant inférieure à la pression ambiante à l'extérieur du logement (12, 14, 18, 20).

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