Protective device for cannula used to draw blood
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United States of America Patent
Stats
-
Feb 13, 1990
Grant Date -
N/A
app pub date -
Oct 7, 1988
filing date -
Oct 7, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A protective device for enclosing the scarf of a cannula used to draw blood includes an elongated sheath open at one end and having stop means at the other end. A piston is disposed in the sheath to be slidable between an extended position against the stop means and a retracted position away from the stop means. The piston has a bore extending through it in the direction in which the piston slides. Means are provided for securing an elongated, double-ended cannula in the piston bore so the cannula extends longitudinally through the bore with one end of the cannula in the sheath and the other end of the cannula extending outwardly away from the sheath when the piston is in the extended position. Means are provided for sliding the piston away from the stop means to the retracted position to retract the outwardly extending end of the cannula into the sheath.
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