System and Method for Measuring Delivered Dose
AssigneeBecton, Dickinson and Company
InventorsGary Searle, Andrew Burke, Peter Costello, Kenneth Focht, Francis L. Ross
Life of this patent
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Abstract
A flow sensor is provided to enable volumetric dose data to be acquired automatically by sampling flow rates of insulin measured by a flow sensor exposed to a flow manifold though which the insulin flows. The flow sensor preferably connects to a standard insulin pen on one end, and to a standard pen needle on the other end. Particular geometries and algorithms are utilized to accommodate the unique requirements of insulin flow determination during an injection event.
Claims7
A flow sensor comprising:
- a housing comprising a flow channel having an input end shaped to receive a pen injection device, and an output end shaped to receive a pen needle,
- a sensor comprising a sensing surface exposed within said flow channel, the sensing surface having a heating element and at least one sensing element downstream of the heating element.
The flow sensor system of claim 4, wherein the flow sensing chip further comprises a secondary pair of sensing elements spaced equidistantly from the heating element at a second distance upstream and downstream of the heating element, the second distance being different than the distance from the heating element to the at least one sensing element and the second sensing element.
Dependencies are inferred from the claim text.