Medicament delivery devices for administration of a medicament within a prefilled syringe
First Claim
1. A method of injecting a medicament, comprising:
- removing a medicament delivery device from a case, the medicament delivery device including a prefilled syringe assembly, a piston member, an actuator, and a syringe enclosure,the prefilled syringe assembly including a syringe body containing the medicament and a needle staked to the syringe body, a proximal end portion of the syringe body including a flange,the piston member having a distal end configured to move within the syringe body,the syringe enclosure defining an internal volume within which the proximal end portion of the syringe body is disposed before and during the injecting the medicament, a distal end of the needle extending beyond a distal end surface of the syringe enclosure before and during the injecting the medicament, a proximal end of the syringe enclosure including a first stop surface and a second stop surface, the second stop surface engaging the flange to limit movement of the prefilled syringe assembly within the syringe enclosure, the case obstructing a view of the medicament within the syringe body before the removing;
viewing, after the removing, the medicament within the syringe body;
placing a distal end portion of the medicament delivery device into contact with a target location; and
moving the actuator to cause a force to be exerted on a proximal end of the piston member, the force moving the distal end of the piston member within the syringe body from a first position to a second position to convey a dose of the medicament from the syringe body through the needle into the target location, the first stop surface limiting distal movement of the piston member when the piston member is at the second position within the syringe body.
5 Assignments
0 Petitions
Accused Products
Abstract
An apparatus includes a housing, a medicament container and a movable member. The medicament container is configured to move within the housing between a first position and a second position in response to a force produced by an energy storage member. A proximal end portion of the medicament container includes a flange and has a plunger disposed therein. A first shoulder of the movable member is configured to exert the force on the flange to move the medicament container from the first position to the second position. A portion of the first shoulder deforms when the medicament container is in the second position such that at least a portion of the force is exerted upon the plunger. A second shoulder of the movable member is configured to exert a retraction force on the flange to move the medicament container from the second position towards the first position.
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Citations
23 Claims
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1. A method of injecting a medicament, comprising:
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removing a medicament delivery device from a case, the medicament delivery device including a prefilled syringe assembly, a piston member, an actuator, and a syringe enclosure, the prefilled syringe assembly including a syringe body containing the medicament and a needle staked to the syringe body, a proximal end portion of the syringe body including a flange, the piston member having a distal end configured to move within the syringe body, the syringe enclosure defining an internal volume within which the proximal end portion of the syringe body is disposed before and during the injecting the medicament, a distal end of the needle extending beyond a distal end surface of the syringe enclosure before and during the injecting the medicament, a proximal end of the syringe enclosure including a first stop surface and a second stop surface, the second stop surface engaging the flange to limit movement of the prefilled syringe assembly within the syringe enclosure, the case obstructing a view of the medicament within the syringe body before the removing; viewing, after the removing, the medicament within the syringe body; placing a distal end portion of the medicament delivery device into contact with a target location; and moving the actuator to cause a force to be exerted on a proximal end of the piston member, the force moving the distal end of the piston member within the syringe body from a first position to a second position to convey a dose of the medicament from the syringe body through the needle into the target location, the first stop surface limiting distal movement of the piston member when the piston member is at the second position within the syringe body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of injecting a medicament, comprising:
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removing a medicament delivery device from a case, the medicament delivery device including a prefilled syringe assembly, a piston member, an actuator, and a syringe enclosure, the prefilled syringe assembly including a syringe body containing the medicament and a needle staked to the syringe body, a proximal end portion of the syringe body including a flange, the piston member having a distal end configured to move within the syringe body, the actuator configured to move to initiate the injecting the medicament, the case limiting movement of the actuator before the removing, the syringe enclosure defining an internal volume within which the proximal end portion of the syringe body is disposed before and during the injecting the medicament, a distal end of the needle extending beyond a distal end surface of the syringe enclosure before and during the injecting the medicament, a proximal end of the syringe enclosure including a first stop surface and a second stop surface, the second stop surface engaging the flange to limit movement of the prefilled syringe assembly within the syringe enclosure; placing a distal end portion of the medicament delivery device into contact with a target location; and moving the actuator to cause a force to be exerted on a proximal end of the piston member, the force moving the distal end of the piston member within the syringe body from a first position to a second position to convey a dose of the medicament from the syringe body through the needle into the target location, the first stop surface limiting distal movement of the piston member when piston member is at the second position within the syringe body. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of injecting a medicament, comprising:
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removing a medicament delivery device from a case, the medicament delivery device including a prefilled syringe assembly, a piston member, an actuator, and a syringe enclosure, the prefilled syringe assembly including a syringe body containing the medicament and a needle staked to the syringe body, a proximal end portion of the syringe body including a flange, the piston member having a distal end configured to move within the syringe body, the syringe enclosure defining an internal volume within which the proximal end portion of the syringe body is disposed before and during the injecting the medicament, a distal end of the needle extending beyond a distal end surface of the syringe enclosure before and during the injecting the medicament, a proximal end of the syringe enclosure including a first stop surface and a second stop surface, the second stop surface engaging the flange to limit movement of the prefilled syringe assembly within the syringe enclosure, the case obstructing a view of the medicament within the syringe body before the removing; viewing, after the removing, the medicament within the syringe body; placing a distal end portion of the medicament delivery device into contact with a target location; and actuating the medicament delivery device to cause movement of the distal end of the piston member within the syringe body from a first position to a second position, a dose of the medicament being conveyed from the syringe body through the needle into the target location when the distal end of the piston member moves from the first position to the second position, the first stop surface limiting distal movement of the piston member when piston member is at the second position within the syringe body. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification