Syringe devices and methods for mixing and administering medication
First Claim
1. A syringe device comprising:
- a syringe body comprising a cylindrical housing and a chamber within the housing, the chamber having a longitudinal axis;
a piston comprising a stem, a longitudinal axis, a first end at a first end of the longitudinal axis and a second end opposing the first end, the first end being external to the chamber, the piston comprising a first opening at the first end and a second opening at the second end;
a fluid passageway extending through the first opening, longitudinally through the stem and through the second opening of the piston;
a third opening disposed along the longitudinal axis at a position between the first end and the second end of the piston other than at the first or second end of the piston and traversing the fluid passageway;
a valve, at least a portion of which is inserted within the third opening and orthogonally traversing the fluid passageway, the valve controlling selective fluid passage through the piston and being at least partially insertable within the cylindrical housing of the syringe body;
a piercing structure associated with the first end of the piston, the piercing structure a base having a first diameter, a head portion having a maximum width, and a tube segment extending between the base and the head portion, the tube segment having a second diameter that is smaller than the first diameter and shorter than the maximum width of the head portion; and
a piston seal attached to the second end of the piston.
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Accused Products
Abstract
The invention includes a device having a chamber within a syringe. A fluid passageway extends through a syringe piston. A valve is associated with the passageway controlling fluid passage through the piston. The invention includes a piercing structure having a head segment and a body portion, with a channel through the body portion and through at least one surface of the head without passing through the tip. In another aspect the invention encompasses a method of preparing an agent for administration to an individual. A first component is provided within a syringe and a second component is provided within a vial. A closed valve is associated with a fluid passageway between the vial and the syringe barrel through a piston. Valve repositioning allows fluid passage and sliding of the piston joins the first and second components. Repeated sliding of the piston mixes the components to produce the medication agent.
333 Citations
20 Claims
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1. A syringe device comprising:
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a syringe body comprising a cylindrical housing and a chamber within the housing, the chamber having a longitudinal axis; a piston comprising a stem, a longitudinal axis, a first end at a first end of the longitudinal axis and a second end opposing the first end, the first end being external to the chamber, the piston comprising a first opening at the first end and a second opening at the second end; a fluid passageway extending through the first opening, longitudinally through the stem and through the second opening of the piston; a third opening disposed along the longitudinal axis at a position between the first end and the second end of the piston other than at the first or second end of the piston and traversing the fluid passageway; a valve, at least a portion of which is inserted within the third opening and orthogonally traversing the fluid passageway, the valve controlling selective fluid passage through the piston and being at least partially insertable within the cylindrical housing of the syringe body; a piercing structure associated with the first end of the piston, the piercing structure a base having a first diameter, a head portion having a maximum width, and a tube segment extending between the base and the head portion, the tube segment having a second diameter that is smaller than the first diameter and shorter than the maximum width of the head portion; and a piston seal attached to the second end of the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A syringe device comprising:
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a syringe body comprising a cylindrical housing and a chamber within the housing; a piston insertable within the chamber and having a longitudinal axis, the piston comprising a first stem portion and a second stem portion, the first stem portion and second stem portions together forming a rotatable valve that is controlled by rotation of the second stem portion relative to the first stem portion; a fluid passageway extending along the longitudinal axis through the stem, such that the rotatable valve controls fluid passage though the piston; and a piston seal attached to the first stem portion and being independent of the rotatable valve. - View Dependent Claims (20)
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Specification