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Fixed Dose Pen
A pen injector for low-viscosity drugs like Teriparatide, with the fewest parts of any comparable device and a dose counter built into the plunger rod.
- Year
- 2020–21
- Where
- Mediscient Devices Pvt. Ltd.
- My role
- Co-developed the delivery mechanism; sole owner of the dose counter concept
- Disclosure
- Mechanism details confidential
The Fixed Dose Pen is a pen injector designed to deliver low-viscosity drugs like Teriparatide, taken as a daily injection.
- Customisable to deliver a dose ranging from 0.02 mL to 0.2 mL.
- The fewest parts in the assembly compared to all its competitors.
- The most compact design.
Dose counter
The dose numbers are printed on the plunger rod, which rotates 180° for each dose. On each rotation and forward movement a new (n−1) number appears, until it gets to zero. On reaching zero the device locks itself and can be disposed of.
Most other similar existing devices have a far more complex dose counting mechanism involving one or two extra parts. Those extra parts drive up moulding and assembly cost, which is not ideal for developing markets like India.
