Mixing pen needle
First Claim
Patent Images
1. A medication pen comprising:
- a pen body having a distal end and a proximal end, and having a first medication compartment and a second medication compartment;
first and second dosing mechanisms and first and second dosage plungers engaged in the respective first and second medication compartments;
a movable housing received on the distal end of the pen body adapted to be received in first and second positions on the pen body;
a pen needle assembly received on the distal end of the movable housing, said pen needle assembly comprising a patient end needle, a filler needle, and a collapsible mixing reservoir intermediate and accessed by said patient end needle and said filler needle;
wherein the movable housing is movable between a first position in which the filler needle is in fluid communication with the first medication compartment and a second position in which the filler needle is in fluid communication with the second medication compartment; and
wherein collapsing the mixing reservoir forces medication in the mixing reservoir through the patient end needle during an injection.
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Abstract
An injection device is provided with dual medicament chambers and a mixing pen needle assembly, whereby predetermined dosages of two medicaments can be provided to a mixing reservoir in the pen needle assembly and delivered simultaneously with the injection device.
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Citations
13 Claims
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1. A medication pen comprising:
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a pen body having a distal end and a proximal end, and having a first medication compartment and a second medication compartment; first and second dosing mechanisms and first and second dosage plungers engaged in the respective first and second medication compartments; a movable housing received on the distal end of the pen body adapted to be received in first and second positions on the pen body; a pen needle assembly received on the distal end of the movable housing, said pen needle assembly comprising a patient end needle, a filler needle, and a collapsible mixing reservoir intermediate and accessed by said patient end needle and said filler needle; wherein the movable housing is movable between a first position in which the filler needle is in fluid communication with the first medication compartment and a second position in which the filler needle is in fluid communication with the second medication compartment; and wherein collapsing the mixing reservoir forces medication in the mixing reservoir through the patient end needle during an injection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification