News Column

Patent Issued for Biosensor with Finger-Positioning Function

June 2, 2014

By a News Reporter-Staff News Editor at Diabetes Week -- BroadMaster Biotech Corp. (New Taipei, TW) has been issued patent number 8728009, according to news reporting originating out of Alexandria, Virginia, by NewsRx editors (see also BroadMaster Biotech Corp.).

The patent's inventors are Tsai, Hsin-Yu (New Taipei, TW); Yu, Li-Wei (Kaohsiung, TW); Pan, Lung-Te (New Taipei, TW).

This patent was filed on March 23, 2012 and was published online on May 20, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "The present invention relates to biosensors, and more particularly to a biosensor having a feature for positioning a finger.

"With the rapid economic development and the change of modern people's lifestyle and dietary patterns, the global prevalence of diabetes has dramatically increased and diabetes has posed as one of the top challenges to the medical science. Diabetes is known as a chronic disease that cannot be cured completely but can only be effectively controlled to prevent complex complications caused thereby. Thus, for achieving good control of diabetes, a diabetic is always required to monitor his or her blood sugar level regularly.

"Currently, using biosensors to measure blood sugar level is one of the most popular ways for diabetics to record and thereby monitor their blood sugar levels every day. As such biosensors, many glucose meters, for example, measure blood sugar levels by way of electrochemical method in recent years. The electrochemical method involves using electrodes and immobilized glucose oxidase or glucose dehydrogenase. Operation of a conventional glucose meter working upon this method typically includes the following steps. First, a test strip is inserted into the glucose meter to turn on the glucose meter automatically. Then a user uses a disposable blood lancet or a blood-sampling pen equipped with a blood lancet to puncture one fingertip and squeeze the finger to raise a drop of blood. Afterward, using his/her free hand, the user holds the glucose meter with the test strip installed, and aligns the window of the test strip with the drop of blood on his/her finger. As a result, the test strip absorbs the blood by capillarity and the enzyme-containing reagent therein reacts with the glucose in the blood to generate an electric current that is then converted by the glucose meter into a reading representing the blood sugar level and displayed at the screen of the glucose meter.

"While the conventional glucose meter is easy to use and provides accurate measurement, a significant disadvantage thereof exists because the user needs to hold the glucose meter and aligns the window of the test strip precisely with the punctured, blood-oozing finger. To some aged people suffering from, for example, presbyopia or Parkinson's disease, or people having poor hand-eye coordination, it would be very difficult to align the small blood drop on one finger with the narrow test strip (typically having a width smaller than 1 centimeter) in the other hand, and once the user fails in alignment or moves his or her finger, the blood on the finger may fall and cause contamination. Thus, the conventional glucose meter needs to be improved.

"Hence, it would be desired to have an improved biosensor that allows users to operate it with a single hand, or enables people with poor eyesight or with hand tremor to use it easily and conveniently."

Supplementing the background information on this patent, NewsRx reporters also obtained the inventors' summary information for this patent: "In view of the shortcomings of the prior art, the inventor devises a biosensor that enables single-hand operation and has a finger-positioning function. With the finger-positioning function of the disclosed biosensor, a user having his/her finger punctured by a blood lancet just needs to simply lay the finger on the biosensor placed on a tabletop, and the finger can be aligned with the test strip to let the test strip absorb the blood drop on the finger. Thus, the user needs not to hold the biosensor with the other hand and manually align the test strip with the blood drop on the finger.

"Therefore, one aspect of the invention is to provide a biosensor with finger-positioning function, characterized in that the biosensor comprising: a bottom plate, a cover and a test-strip socket, wherein the cover mounted on the bottom plate has a front end provided with a guiding plate for positioning a finger, and the guiding plate has a center line and a guiding surface, in which the center line passes through a center of the guiding surface; and the test-strip socket is formed at the front end of the cover.

"In an embodiment of the present invention, the test-strip socket is formed on the center line of the guiding plate.

"In virtue of the unique design, after the biosensor receives a test strip at its test-strip socket and automatically starts, it can be placed on a tabletop and get ready to perform measurement. Then a user, who use a disposable blood lancet or a blood-sampling pen equipped with a blood lancet to puncture his/her finger and squeezing the finger to raise a drop of blood, can rest his/her wrist and palm on the cover of the biosensor and use the guiding surface provided at the front end of the cover to properly position the punctured finger.

"In one preferred embodiment, the guiding surface is inclined from the guiding plate toward the test-strip socket, so as to guide the punctured finger to align with the test strip. The cover has its front end formed with a depressed guiding plate and two sides of the guiding plate form an aligning feature. Preferably, the aligning feature are symmetrical angled structures at two sides for the finger to sit, so that the finger can be easily aligned with the test strip despite hand tremor or other reasons that otherwise hinder the bare alignment. In the preferred embodiment of the present invention, since the guiding plate is for facilitating the alignment between the finger and the test strip, the guiding surface of the guiding plate is better limited in width to an extent that allows it to fittingly receive a single human finger. In particular, the width of the guiding surface is preferably of 1 to 3 centimeters; more preferably about 2 centimeters; and most preferably about 1.5 centimeters.

"In one embodiment of the present invention, the guiding plate further includes an audio output, the audio output serves to display audio instructions based on an audio carrier or a chip loaded with audio files and audio drivers installed in the biosensor, thereby voicefully guiding the user to operate the biosensor by following the prerecorded step-by-step instructions.

"In another preferred embodiment of the present invention, a removable chassis is deposited below the test-strip socket of the biosensor body. In the event that the user bleeds much, the removable chassis serves to receive the excessive blood and prevents the blood from contaminating the environment. The chassis receiving the blood can then be removed from the disclosed biosensor and cleaned easily.

"In another preferred embodiment of the present invention, the cover of the biosensor further comprises a USB connecting port through which the user's individual blood sugar levels can be transmitted to a personal computer, a remote monitoring system hosted by a medical service provider or other blood-sugar management application for graphically showing the user's blood-sugar profile."

For the URL and additional information on this patent, see: Tsai, Hsin-Yu; Yu, Li-Wei; Pan, Lung-Te. Biosensor with Finger-Positioning Function. U.S. Patent Number 8728009, filed March 23, 2012, and published online on May 20, 2014. Patent URL:

Keywords for this news article include: Diabetes, Chemistry, Biosensing, Bioengineering, Electrochemical, Bionanotechnology, Nanobiotechnology, BroadMaster Biotech Corp..

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Source: Diabetes Week

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