Blood Sampling Actuators

My MSc research involved developing new techniques for collecting blood for wearable glucose monitoring applications. The thesis text and summary are publicly available from the University of Calgary.

Overhead and side view of mechanism concept
Core concept of the main area of investigation: Shape memory alloy wires contract to pull a slider, which drives an L-shaped needle against one wall of a custom opening, causing the needle to rotate downwards.

Needle in rotating joint with disposable plastic part, fitted onto multi-use metal part.
The most sophisticated version of the slider-needle assembly: the L-shaped needle was embedded in a disposable plastic part, free to rotate between 15 and 90° relative to the main plane. The plastic part was fitted onto a metal slider, providing isolation and a reliable interface between single- and multi-use parts of the mechanism.