Drug delivery device configured for pain reduction during injection
An injection device may include a housing and a baseplate coupled to the housing. The baseplate may include a flange portion and an axial portion that extends from the flange portion in a longitudinal direction of the housing. The baseplate may be an opaque, polymer material that is more thermally conductive than a material of the housing. The injection device may additionally include a syringe at least partially disposed within the housing. The syringe may include a needle. The injection device may include a deployment mechanism configured to move the syringe relative to the housing from a retracted position to a deployed position in which the needle projects beyond the baseplate. At least a portion of the syringe may be visible when the syringe is in the retracted position.
1 . An injection device comprising:
a housing;
a baseplate coupled to the housing, the baseplate including a flange portion and an axial portion that extends from the flange portion in a longitudinal direction of the housing, wherein the baseplate is an opaque, polymer material that is more thermally conductive than a material of the housing; and
a syringe at least partially disposed within the housing, the syringe including a needle,
wherein the syringe is movable relative to the housing from a retracted position to a deployed position in which the needle projects beyond the baseplate,
wherein at least a portion of the syringe is visible when the syringe is in the retracted position,
wherein the baseplate comprises a material configured to transfer at least 3 Watts for the initial second of injection or an average of 1.6 Watts over a period of time of 10 seconds from a heat source with a temperature of 37 degrees C.
2 . The injection device of claim 1 , wherein the syringe is filled with a medication.
3 . The injection device of claim 2 , wherein at least a portion of the medication is visible when the syringe is in the retracted position.
4 . The injection device of claim 1 , wherein the axial portion of the baseplate includes an opening passing through the axial portion in a direction perpendicular to the longitudinal direction, and the at least a portion of the syringe is visible through the opening.
5 . The injection device of claim 4 , wherein the opening includes one or more selected from the group of a slit, a gap, a window, a hole, and an aperture.
6 . The injection device of claim 1 , wherein a proximal end of the axial portion of the baseplate is distal to a proximal end of the syringe when the syringe is in the retracted position.
7 . The injection device of claim 1 , wherein a skin-contacting surface of the flange portion of the baseplate includes a plurality of protrusions.
8 . The injection device of claim 1 , wherein the baseplate is electrically conductive or/and resistive.
9 . An injection device comprising:
a housing;
a thermally conductive baseplate coupled to the housing, the baseplate including a flange portion and an axial portion that extends from the flange portion in a longitudinal direction of the housing, wherein the axial portion includes an opening passing through the axial portion in a direction perpendicular to the longitudinal direction; and
a syringe movable relative to the housing from a retracted position to a deployed position in which a needle of the syringe projects beyond the baseplate,
wherein the baseplate comprises a material with a thermal conductivity in each of a mold flow and a mold crossflow directions of at least 24 W/(m K).
10 . The injection device of claim 9 , wherein at least a portion of the syringe is visible through the opening.
11 . The injection device of claim 9 , wherein the opening includes one or more selected from the group of a slit, a gap, a window, a hole, and an aperture.
12 . The injection device of claim 9 , wherein the syringe is filled with a medication, and wherein at least a portion of the medication is visible when the syringe is in the retracted position.
13 . The injection device of claim 9 , wherein a skin-contacting surface of the flange portion of the baseplate includes a plurality of protrusions.
14 . The injection device of claim 9 , wherein the material of the baseplate has electrically conductive or/and resistive properties.
15 . An injection device comprising:
a housing;
a baseplate coupled to the housing, the baseplate including a flange portion and an axial portion that extends from the flange portion in a longitudinal direction of the housing, wherein the baseplate comprises a thermal conductive material that is more thermally conductive than a material of the housing;
a reservoir at least partially disposed within the housing, a needle coupled to the reservoir; and
the needle is moved to project beyond the baseplate,
wherein the axial portion of the baseplate is in contact with the reservoir, and
wherein in response to skin contact with the flange portion, heat is configured to be transmitted through the flange portion and the axial portion of the baseplate and to the reservoir.
16 . The injection device of claim 15 , wherein a surface of the flange portion to be in contact with the syringe includes a plurality of protrusions.
17 . The injection device of claim 15 , wherein the thermal conductive material of the baseplate is configured to wick away heat from the skin at a power (W) of 3.5 W within a first second of skin contact.
18 . The injection device of claim 15 , wherein the thermal conductive material of the baseplate has electrically conductive or/and resistive properties.