I-Sens, Inc.

Other

Geun Sig Cha

University of Utah Research Foundation

Infopia Co., Ltd.

Eyelab Group, LLC

I-Sen, Inc.

Nano-Ditech Corporation

Cha, Geun Sig

Hakhyun Nam

Jihoon Kim

Hyun Ho Choi

Gang Cui

Moon Hwan Kim

Jae Ho Shin

Jae Hyun Yoo

Tae Young Kang

Geun-Sig Cha

Jeonghan Ha

Myeongho Lee

Sung Hyuk Choi

Heejun Lee

Seok-Won Lee

Jong Sik Kim

Mark E Meyerhoff

Young Jea Kang

Goang Yel Ryu

Ji Hoon Wang

Kyung Chul Chae

Keun Ki Kim

Joo Young Cho

Dongxuan Shen

Sung Dong Lee

In Jun Yoon

Richard B Brown

Jin Seo Lee

Tae Eun Kim

Jae Seon Lee

Youngjea Kang

Moon Hee Choi

Yong Suk Choi

Donald E Gillespie

Henry S White

Jina Yoo

Hyunho Choi

In Seok Jeong

Ryan J White

Dong Hoon Han

Jin-Young Park

Jae-hyun Yoo

Junhee Han

Eun-Jong Cha

Kyung-Ah Kim

Joung Su Lee

Jungwon Shin

Sung-Kwon Jung

Ho Dong Park

Fenghua Zhang

Ung Ki Lee

Kap Soo Park

Sung Pil Cho

Hyo Jung Yoon

Byeong Woo Bae

Bruce E Cohan

Min-sun Kim

Zvi Flanders

Bo Kyeong Kang

Moon-Hwan Kim

Jun Ho Shim

Ju Yong Kim

Chang Woo Ryu

Myeong-Ho Lee

Yeon-Ho Jung

Ju-Yong Kim

Han-Be Park

Jung-Hee Uhm

Hyo Lin Lee

Han Be Park

Min Hyung Lee

Byung Wook Woo

Da Yeon Sung

Kyungchul Chae

Jea Hun Song

Sung A Hong

Hyun Joon Oh

Goangyel Ryu

Kyujeong Song

Min Woo Suh

Geunsig Cha

Seung Hyeun Jung

Dong Kwon Lee

Yeon Ho Jung

Seong Hee Oh

Myeong Ho Lee

Seok Won Lee

Hyeong Eun Kim

Dae Kag Choi

Jun Hee Han

Su-Moon Park

Young Hoon Kim

Eun Hye Im

Joo-Heon Park

Soon Hye Yang

Keun-Ki Kim

Shim-Ho Lee

Sung-kwon Jung

An apparatus for measuring a concentration of an analyte in a bio-sample using an electrochemical bio-sensor, includes a connector with a sample cell in which an oxidation/reduction enzyme and an electron transfer mediator are fixed and a working electrode and an counter electrode are provided; a digital-to-analog converter circuit configured to apply a constant DC voltage to start the oxidation/reduction reaction of the analyte, proceed with an electron transfer reaction, and apply a &#x39b;-step ladder-type perturbation potential for fluctuating a potential of the sample cell after applying the constant DC voltage; and a microcontroller configured to control the digital-to-analog converter circuit and directly obtain a concentration value of the analyte from a calibration equation using the &#x39b;-step ladder-type perturbation potential. The apparatus can improve measurement accuracy by effectively minimizing a matrix interference effect of a background material in a bio-sample, particularly an inaccuracy caused by a change in hematocrit.

Apparatus and method for measuring concentration of an analyte in bio-samples

The present invention relates to a kit for quantitative analysis of glycated hemoglobin (HbA1c), and the kit for quantitative analysis of HbA1c according to the present invention has excellent long-term stability of an enzyme reagent and thus has an effect of easily overcoming the disadvantages of the conventional reagents used in enzyme assays (e.g., storage, accuracy, portability, convenience of use, etc.).

Kit for hemoglobin A1C quantitative analysis

The present invention relates to a strip ejection apparatus for a blood glucose meter, wherein: an ejector block moving to eject a measurement strip is received in the space inside a housing, whereby it is possible to make the apparatus compact, thereby enhancing space efficiency of the blood glucose meter; components can be mounted on a PCB of the blood glucose meter in units of modules as they are, without any additional separate assembly for the components, whereby it is possible to enhance efficiency of a manufacturing process; a guide protrusion coupled with an ejection switch of the blood glucose meter is selectively formed on the upper or lower portion of the ejector block or formed on both the upper and lower portions thereof, whereby it is possible to enhance the degree of freedom in design of the mounting position of the ejection switch; and the strip ejection apparatus can be applied to various types of blood glucose meters so that it is possible to standardize the type of strip ejection apparatus, thereby reducing manufacturing cost, as well as facilitating component management.

Strip ejection apparatus for blood glucose meter

The present disclosure relates to an electron transfer mediator comprising the osmium complex or a salt thereof, a reagent composition for an electrochemical biosensor, and an electrochemical biosensor, where the osmium compound or its salt maintains a stable oxidation-reduction form for an extended time period, a capacity to react with oxidoreductase being capable of performing the redox reaction of the target analytes, and no effect of oxygen partial pressure.

Electrochemical biosensor

A method for measuring a concentration of an analyte in a bio-sample using an electrochemical bio-sensor according to an exemplary embodiment of the present invention is characterized by a step of obtaining predetermined features from induced currents obtained by applying a DC voltage according to chronoamperometry in which, after a whole blood sample is injected to the electrochemical bio-sensor, a concentration of an analyte is obtained from an induced current obtained by applying a DC voltage for a certain time and from all induced currents obtained by further applying several step-ladder perturbation potentials for a short time subsequent to the DC voltage for the certain time, and is also characterized by minimization of a measurement error caused by a hindering material by forming a calibration equation by combining the at least one feature in a function and optimizing various conditions of the bio-sample through DeletedTextsmultivariable analysis. With this configuration, a perturbation potential application method added to a conventional measurement method can maintain a bio-sensor and a measuring apparatus already used, a line used in the measuring apparatus, and calibration of amperometry as they are, improve accuracy in measurement by effectively minimizing a matrix interference effect of a background material in a bio-sample, particularly an inaccuracy caused by a change in hematocrit, and also remarkably improve accuracy in measurement by simply upgrading a measurement program of a conventional measuring apparatus.

Apparatus and method for measuring concentration of an analyte in whole blood samples

The present invention relates to a stabilizing composition useful for improving the stability of reagent for redox reaction, and a reagent composition for redox reaction having an improved stability. The reagent composition for redox reaction can be applied for a reagent for electrochemical biosensor.

Reagent composition for redox reaction

A composition of redox-reagent containing metal-containing complex and thionine or its derivative as electron transfer mediator for use in an electrochemical biosensor, and a biosensor containing the same are provided. With the increase in reaction rate between redox enzyme-thionine (or its derivative)-metal-containing complex in the composition of redox-reagent containing metal-containing complex and thionine or its derivative, glucose detection efficiency markedly increases, and the composition is hardly influenced from high humidity and interfering substances. Accordingly, the composition of redox-reagent is useful in fabricating an electrochemical biosensor for detecting glucose in blood.

Composition of redox-reagents for electrochemical biosensor and biosensor comprising the same

The present invention relates to an electrochemical biosensor with improved hematocrit measurement accuracy for measuring blood glucose. According to the present invention, an electrochemical biosensor including a first electrode part for correcting a measured hematocrit value and a second electrode part for measuring a glucose concentration is effective in improving accuracy of a measured hematocrit value and in more improving accuracy of a measured blood glucose concentration using the measured hematocrit values for correction, because an insulation cover is made thinner than a working electrode and an auxiliary electrode, so that areas of a first working electrode and a first auxiliary electrode of the first electrode part exposed to a blood sample become equal; a distance between the first working electrode and the second working electrode becomes constant; and electrode areas are maintained constantly by the insulation cover even when a positioning error occurs during printing.

Electrochemical biosensor with improved accuracy

Provided are an amperometric sensor and device for electrochemically quantifying nitrosothiol (RSNO), which is associated with storage and delivery of nitric oxide (NO) in the human body. The amperometric sensor for measuring a concentration of RSNO includes an electrode configured to measure an electric current generated by an oxidation reaction of NO, and a means configured to start and stop photo-induced decomposition of RSNO. Here, the electric current is measured by the oxidation reaction of NO before and after the photo-induced decomposition of RSNO. The amperometric sensor may measure separate signals of RSNO and NO, which are present in the sample at the same time, using one electrode, thereby preventing an inhibition action caused by NO during the measurement of RSNO. Also, the amperometric sensor is simple in structure and easy to manufacture and may be applied to manufacture of a small electrode, and thus may be developed as a sensor for in vivo measurements.

Amperometric sensors and devices for measuring concentration of S-nitrosothiols based on photo-induced decomposition of S-nitrosothiols

Disclosed is an electrochemical biosensor having a sample introduction channel in which an insulator is employed to introduce a small amount of a sample uniformly and accurately and to adjust an area of a working electrode, thereby guaranteeing the accurate quantitative analysis of a sample. Provided with a sample collection barrier at a sample entrance, the biosensor allows a sample to be introduced at higher accuracy and to be analyzed with higher reproducibility and reliability.

Electrochemical biosensor with sample introduction channel capable of uniform introduction of small amount of sample

Disclosed is a hemolysis reagent composition for the quantitative analysis of glycated hemoglobin (HbAlc) via an enzymatic method. The hemolysis reagent compositions of the present invention containing a zwitterionic surfactant and a nitrous compound considerably accelerate hemolysis rate due to the presence of the zwitterionic surfactant, and also induce the N-terminal &#x3b2;-chain of hemoglobin released by hemolysis to be exposed to the outside of the hemoglobin molecule and assists the participation of a greater number of molecules in the reaction, thereby improving reaction sensitivity and reaction rate of the glycated hemoglobin, and the nitrous compound makes the protein structure of the hemoglobin flexibly modified so that the amino acid sequence of the N-terminal &#x3b2;-chain of hemoglobin can be readily cut off, thereby significantly reducing the entire time required for the measurement and improving the accuracy of the measurement.

Hemolysis reagent composition for hemoglobin A1C quantitative analysis using enzymatic method

A lancet holder includes a holder body having a lancet seat at one end to mount a lancet and receiving the lancet and elastic fixing portions arranged in pairs to face each other on the inner side of the holder body so that the lancet received in the holder body is vertically held, and elastically fixing the lancet.

Lancet holder and lancet device including the same

The present invention relates to a biochemical analysis cartridge having improved operability. More particularly, the present invention provides a biochemical analysis cartridge including an insertion-type sample cartridge and a reaction cartridge receiving the insertion-type sample cartridge, in which, as the sample cartridge is inserted into the reaction cartridge, a reaction solution chamber moves toward a broken part of a covertape so as to automatically supply the reaction solution stored in the chamber. The biochemical analysis cartridge having improved operability according to the present invention can induce the mixing between a sample and a reaction solution by simply inserting them into the reaction cartridge and a reaction thereafter, thereby minimizing the process of a measurer to intervene in the assay, and subsequently improving user convenience and operability.

Biochemical analysis cartridge having improved operability

A releasing structure for a lancing device according to an exemplary embodiment of the present invention may include: a lancet body with a lancet at the front; a lancet holder mounted with the lancet body with the lancet at the front; a stem disposed behind the lancet holder and moving the lancet holder forward/backward; a rotary housing pushing/pulling the stem while turning forward at a predetermined angle about a rotational axis defined in the movement direction of the lancet; a torsion spring storing torque for turning the rotary housing forward at a predetermined angle; and a loading handle transmitting torque to the torsion spring while turning forward at a predetermined angle.

Releasing structure for lancing device

The present disclosure relates to a blood sugar meter system with a wireless communication module, and more particularly, to a time synchronization method between a blood sugar meter system with a wireless communication module synchronized with a cellular network such as a global system for mobile communication (GSM)/code division multiple access (CDMA) network and the cellular network. The present invention provides a blood sugar meter system with a wireless communication module applying a time synchronization scheme including: a global system for mobile communication (GSM)/code division multiple access (CDMA) network transmitting network identity and time zone (NITZ) information; and a blood sugar meter metering user's blood sugar data, wherein the blood sugar meter synchronizes a network time according to the NITZ information with an internal time of the metered data and transmits the metered blood sugar data to a server connected to the GSM/CDMA network.

Blood glucose monitoring system having wireless communication module to which time synchronization method is applied

Growing community of inventors

Seoul, South Korea

Hakhyun Nam