US20060264716A1 - Microneedle with Glucose Sensor And Methods Thereof - Google Patents > 자유게시판

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Microneedle technology supplies a helpful minimally-invasive methodology to sample blood. Resulting from their small measurement, microneedles can pierce skin and take minute quantities of blood with minimal influence and or ache to the topic. In spite of their advantages, prior BloodVitals tracker artwork microneedle programs are still considerably invasive since they contain the extraction of blood from the patient. Implanted in vivo sensors present one other means to sample blood chemistry that doesn't require blood extraction. It could be fascinating to achieve a much less invasive method that would not extract blood from the affected person and provide longer measurement occasions than in prior artwork in vivo units. This invention pertains to a microneedle with a glucose sensor. FIG. 3A is a perspective of an array of microneedles with glucose sensors in accordance with embodiments of the current invention. FIG. 4B is a side, cross-sectional view of a working microneedle. FIG. 4C is a facet view of one other array of microneedles in accordance with embodiments of the present invention.

10 region of at least one of many needles which stays exposed to the conductive substrate and on at least a portion of the conductive layer. 200 uM tall, 40 uM in diameter on the tip, and much wider at the bottom. In some embodiments, the needs aren't any wider at the bottom than the tip or they are only considerably wider. Microneedles of this dimension have been shown to supply access to interstitial body fluid without reaching the capillaries or nerves, so there isn't a discomfort. This conductive layer is to cover the needle and its rapid base, however not the tip or the surrounding area, so that every needle has an independent electrical connection. These may very well be supplies like glucose oxidase for the detection of glucose stage in interstitial fluids followed by a protective layer to dam out frequent interferences. FIG. 1 exhibits an isometric view and FIG. 2 shows a section view to indicate the physical development and layers.

FIGS. 3A-3B and FIGS. 4A-4C Rows of needles are proven connected collectively in FIGS. 3A-3B and FIGS. 4A-4C , however they is also individually sensed and inserted. Nafion or PTFE is utilized to dam frequent interferences. This results within the array of needles as shown in FIGS. This background value can be used a baseline from which to measure the analyte of curiosity using the working needles. Having a reference worth and working values, permits a more delicate measurement, for the reason that reference worth could be subtracted from or divided into the working value to effectively eliminate physique fluid and environmental variations. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred versions contained herein. CROSS REFERENCE TO Related Applications - This utility claims the good thing about U.S. Provisional Application No. 60/674,465 filed Apr. 25, 2005, the whole disclosure of which is included herein by reference. Government SPONSORSHIP - This invention was made with government assist below Grant NAG3-2744 awarded by NASA.

The federal government has certain rights within the invention. BACKGROUND - Microneedle expertise supplies a useful minimally-invasive technique to pattern blood. As a consequence of their small dimension, microneedles can pierce pores and BloodVitals tracker skin and take minute quantities of blood with minimal affect and or pain to the subject. Regardless of their benefits, prior art microneedle programs are still somewhat invasive since they contain the extraction of blood from the patient. Implanted in vivo sensors present another means to sample blood chemistry that does not require blood extraction. Unfortunately, in vivo sensors work together with the physiology and are vulnerable to degradation during use. It could be desirable to achieve a less invasive method that would not extract blood from the patient and provide longer measurement instances than in prior artwork in vivo devices. Field OF THE INVENTION - This invention pertains to a microneedle with a glucose sensor. FIG. 4C is a aspect view of another array of microneedles in accordance with embodiments of the present invention.