Apparatus and method for rapid auto-injection of medication
First Claim
1. A device for automatic rapid injection of a bolus of medication comprising:
- a flat, rigid housing having front and back walls spaced to define the thickness of the housing, the housing having logitudinally disposed forward and rearward ends;
a syringe adapted to contain an injectable medication, the syringe including a syringe body having a longitudinally compressible volume to enable a predetermined volume of injectable medication to be forced out of the syringe and an injection needle arranged to communicate with the interior of the syringe body, the flow path from the syringe body and through the needle being dimensioned to permit rapid delivery of the medication, both of the syringe body and the needle being disposed within the housing in a retracted position, the syringe being movable longitudinally as a unit from the retracted position to an injection position in which the needle extends longitudinally beyond the forward end of the housing to penetrate tissue; and
at least a portion of the syringe body being movable rapidly and longitudinally, after the needle has been extended to the injection position, to compress the syringe volume by a predetermined volume and eject a bolus corresponding to that predetermined volume.
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Accused Products
Abstract
An auto-injector for rapid delivery of a bolus of injectable medication has a generally flat, sealed housing with small peripheral dimensions, approximating those of a credit card. A syringe, configured to be contained within the flat housing is pre-filled with the medication. The housing contains a mechanism that, when triggered, automatically drives the syringe and needle forwardly to an injection position and then continues to compress the volume of the syringe to effect rapid injection. The forward injection end of the device includes an actuator that also conceals and protects the needle at all times and, prevents post-injection hazards. The flat faces of the device have graphic symbols and other visual indicia relating to the operation and condition of the device. The device enables a simple three-step operation that reduces the risk of improper use.
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Citations
45 Claims
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1. A device for automatic rapid injection of a bolus of medication comprising:
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a flat, rigid housing having front and back walls spaced to define the thickness of the housing, the housing having logitudinally disposed forward and rearward ends;
a syringe adapted to contain an injectable medication, the syringe including a syringe body having a longitudinally compressible volume to enable a predetermined volume of injectable medication to be forced out of the syringe and an injection needle arranged to communicate with the interior of the syringe body, the flow path from the syringe body and through the needle being dimensioned to permit rapid delivery of the medication, both of the syringe body and the needle being disposed within the housing in a retracted position, the syringe being movable longitudinally as a unit from the retracted position to an injection position in which the needle extends longitudinally beyond the forward end of the housing to penetrate tissue; and
at least a portion of the syringe body being movable rapidly and longitudinally, after the needle has been extended to the injection position, to compress the syringe volume by a predetermined volume and eject a bolus corresponding to that predetermined volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification