Jet-induced Tissue Disruption for Blood Release.
IEEE Trans Biomed Eng 2021;
69:1850-1859. [PMID:
34807816 DOI:
10.1109/tbme.2021.3129606]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE
Needle free jet injection is a drug delivery technique that uses the momentum of the fluid drug to break through the skin. This technique has recently also been applied to blood release, aiming to collect samples from capillaries in the skin without needing a lancet prick. This work provides new information about the wound geometry and tissue disruption caused by shallow jet injection with circular shaped and slot shaped jets.
METHODS
We use histological analysis to compare the disruption of tissue, including blood vessels, caused by lancet-pricking and jet injection with a circular shaped jet and a lancet-inspired slot shaped jet.
RESULTS
Intradermal injection into porcine skin using a slot shaped jet disrupted more vascular endothelium in the tissue than a circular shaped jet and did so at a smaller penetration depth with smaller wound volume. Our results suggest that shallow jet injections may have the potential to release more capillary blood than a lancet prick.
CONCLUSION
These findings demonstrate that a reversible jet injector might be used in diabetes management as a device to release and collect blood samples, in addition to being used to deliver insulin.
SIGNIFICANCE
Tissue disruption is crucial to consider when using jet injection to deliver drug and release capillary blood.
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