An automatic injector dispenses a predetermined dose of medicament without a user having to manually force the needle into an injection site. The automatic injector includes a needle cover having a locked retracted position with respect to the injector housing prior to a medicament dispensing operation. The needle cover is operative to engage an injection site prior to a medicament dispensing operation.

Devices and methods are disclosed that provide a syringe actuator device for use in the distention and irrigation of a body conduit before the use in a medical procedure such as a coronary bypass graft procedure. The device can be retrofit to a syringe by attaching it to the cap of the plunger and engaged to automatically apply pressure to fluid in the syringe. In some embodiments, elastic bands attached to the device are easily engaged or removed from a syringe during a procedure to limit the pressure on the syringe to various levels. The device may be overridden by an operator pushing on the plunger of the syringe as in normal syringe operation.

A plunger assembly (100) for use with an auto-injector and comprising: a cartridge (102); and a firing assembly (103) comprising a plunger rod (104) and a drive portion (105), the firing assembly (103) being axially moveable relative to the cartridge (102), wherein the firing assembly (103) is configured to couple to the cartridge (102) at a coupling point along a length of the cartridge (102) to fix an axial position of the drive portion (105) relative to the cartridge (102), and wherein the length of the cartridge (102) is configured to be extended in a rearward direction such that the coupling point and a forward end (106) of the plunger rod (104) move rearwards.

An apparatus (100) for use with an auto-injector configured to receive a syringe and comprising: a firing assembly (102) comprising a rearward portion (108), a plunger rod (110) moveable forward relative to the rearward portion (108) and a plunger rod driver (112) configured to drive the plunger rod (110) forward relative to the rearward portion (108); an insertion driver (106) configured to drive the syringe forwards on an insertion stroke for inserting a needle of the syringe into an injection site; and wherein the firing assembly (102) further comprises a retainer (114) engaged with the plunger rod (110) and/or the rearward portion (108) and configured to prevent forward movement of the plunger rod (110) relative to the rearward portion (108), and to disengage from the firing assembly (102) at a point on the insertion stroke.

Injector devices and methods for using them to deliver medicament into a patient's body, e.g., sub-retinally within an eye, are provided. The injector includes an injector cannula having a soft injector tip. A retractable tip protector tube is slidably disposed on the flow cannula between an extended position in which the tip protector tube covers the entire injector tip, and a retracted position in which the tip protector tube is retracted proximally thereby exposing at least part of the injector tip. Accordingly, the tip protector tube protects the injector tip from being damaged while advancing the injector tip to a target injection site.

A lock adapter, a syringe assembly, and a prefilled syringe capable of suppressing variation in position on the tip end side of the lock adapter after being subjected to an autoclave sterilization process. The lock adapter is attached to the periphery of a nozzle portion at the tip end of the prefilled syringe and slidable in an axial direction of the nozzle portion. The lock adapter includes: a cylindrical body portion surrounding the periphery of the nozzle portion; and a claw portion protruding to an inner peripheral side from a base end portion of the cylindrical body portion and configured to determine a tip end position of the lock adapter by being caught in an annular rib extending in a circumferential direction of the nozzle portion, in which the claw portion has a circumferential shape when viewed from the axial direction and is integrally connected in the circumferential direction.

A medical puncture needle is configured to reliably administer a sufficient amount of a liquid medicine to thin tissue. The medical puncture needle includes: a main body having a cylindrical shape and having inside a through hole; a blade surface that has an annular shape and that is cut into a tapered shape so that a thickness of the main body reduces toward a tip part of the main body; and a blade edge that has an annular shape, the blade edge being formed at a tip of the blade surface so as to extend along a plane orthogonal to a central axis of the main body.

An injection device includes a needle, a needle sleeve surrounding the needle, the needle sleeve having an aperture and being arranged such that the needle extends through the aperture during an injection process, and a needle obscuring element movable between a first position and a second position relative to the needle sleeve. The needle obscuring element is coupled to the needle sleeve when in the first position and when in the second position. The needle obscuring element is arranged to cover a larger portion of the aperture when in the second position than when in the first position.

This disclosure relates to features of an injection device arranged to provide a sensory distraction to a user during insertion of a needle into flesh. According to a first aspect, an injector device includes a housing having a proximal end and a distal end, and configured to receive a container of medicament, a needle housing for holding a needle in a position at the distal end of the housing, and a needle sleeve mounted within the housing, wherein the needle sleeve and needle housing are moveable relative to one another by a user action between a first configuration in which the needle sleeve would enclose a needle, and a second configuration in which a needle would extend from the needle sleeve in the distal direction, wherein the needle sleeve comprises a portion configured to vibrate and/or rotate during motion between the first configuration and the second configuration.

This disclosure relates to features of an injection device arranged to provide a sensory distraction to a user during insertion of a needle into flesh. According to a first aspect, an injector device includes a housing having a proximal end and a distal end, and configured to receive a container of medicament, a needle housing for holding a needle in a position at the distal end of the housing, and a needle sleeve mounted within the housing, wherein the needle sleeve and needle housing are moveable relative to one another by a user action between a first configuration in which the needle sleeve would enclose a needle, and a second configuration in which a needle would extend from the needle sleeve in the distal direction, wherein the needle sleeve comprises a portion configured to vibrate and/or rotate during motion between the first configuration and the second configuration.