Manually actuated infusion device with display
A manually operated medicament infusion device is provided. The device is capable of delivering an accurately controlled volume of medicament with reliability. Additionally, the device includes a battery-operated indication device for tracking the number of doses of medication delivered. Optionally, the device includes a ratchet and pawl to prevent inadvertent dispensing of medicament.
1. A medicament infusion device comprising:
a.) a housing;
b.) a battery-operated indication device within the housing, wherein the indication device provides information about a medicament in a medicament cartridge;
c.) a manually operated gearing mechanism consisting essentially of a manually operated drive wheel, a leadscrew base and a leadscrew shaft extending from the leadscrew base;
d.) a piston comprising a piston end, wherein the piston is indexed in a first direction along the leadscrew shaft in response to turning of the manually operated drive wheel;
e.) the medicament cartridge having a plunger therein that is engaged by the piston end;
f.) a removable retainer for retaining the medicament cartridge and piston therein; and
g.) a sensing mechanism for sensing a position of the piston on the leadscrew shaft.
2. The infusion device of claim 1 , further comprising a rewind tool for returning the piston to an initial position on the leadscrew shaft.
3. The infusion device of claim 1 , further comprising a ratchet and pawl capable of preventing inadvertent turning of the manually operated drive wheel.
4. The infusion device of claim 1 , further comprising an adhesive pad on a surface of the housing for adhering the infusion device to a body of a device user.