Two-cannula syringe
First Claim
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1. A syringe assembly comprising:
- (a) an injection cannula having two ends, one end being connected to said assembly the other end being a free end, said injection cannula being movable between a front position and a back position;
(b) an aspiration cannula surrounding and slidably engaging said injection cannula, said aspiration cannula being operable to puncture containers containing sealed liquids and to aspirate, degas, and mix the liquids as they pass through said aspiration cannula into said injection cannula through said free end, said aspiration cannula extending beyond said free end when said injection cannula is in said back position, said free end extending outside of said aspiration cannula when said injection cannula is in said forward position; and
(c) guiding means operably attached to said injection cannula for moving said injection cannula between said front and back positions, such that by upon placing said injection cannula in said back position, said aspiration cannula may be used to aspirate liquids into said syringe assembly without soiling said free end of said injection cannula and upon moving said guide means and said injection cannula to said front position, said free end is made available to inject the liquid free of said aspiration cannula.
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Accused Products
Abstract
A two-cannula syringe for the aspiration and for the injection of medicaments in the form of liquids. The syringe includes a first cannula for the aspiration of the liquid into a cylinder of the syringe and for the possible mixing and/or degassing of the liquid and a second cannula for the actual injection. Both cannulae are present in a protected state, the first cannula being disposed so as to be displaced relative to the second and/or so as to be removable or displaceable in the longitudinal direction of the syringe, and both cannulae being disposed about the same longitudinal axis of the syringe.
133 Citations
6 Claims
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1. A syringe assembly comprising:
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(a) an injection cannula having two ends, one end being connected to said assembly the other end being a free end, said injection cannula being movable between a front position and a back position; (b) an aspiration cannula surrounding and slidably engaging said injection cannula, said aspiration cannula being operable to puncture containers containing sealed liquids and to aspirate, degas, and mix the liquids as they pass through said aspiration cannula into said injection cannula through said free end, said aspiration cannula extending beyond said free end when said injection cannula is in said back position, said free end extending outside of said aspiration cannula when said injection cannula is in said forward position; and (c) guiding means operably attached to said injection cannula for moving said injection cannula between said front and back positions, such that by upon placing said injection cannula in said back position, said aspiration cannula may be used to aspirate liquids into said syringe assembly without soiling said free end of said injection cannula and upon moving said guide means and said injection cannula to said front position, said free end is made available to inject the liquid free of said aspiration cannula. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification