Abstract
We present a new lancet-free method of capillary blood collection for the measurement of blood glucose concentration using a needle-free jet injector. This technique is tested on living animals and directly compared to the current best practice, lancet prick. Shallow jet injection into porcine outer-ear was performed using a portable needle-free jet injector with a slot-shaped nozzle. The jet injections presented used about 25 µL of injectate to penetrate porcine skin to about 1.4 mm, which is within the WHO standards for capillary blood sampling. The blood and fluid released by the jet injections and lancet pricks was collected. The volume and colour of these samples were analysed. The results demonstrate that jet injection is a feasible technique for the collection of capillary blood, despite the small volume of blood samples retrieved from all four pigs. Jet injection may be used in the future to retrieve capillary blood samples from human fingertips.
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