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Manipulating Diabetes by Mooting Blood Clott Time Parameter

N.D.Meshram1 and P. B. Dahikar2
  1. Professor, Shri. Mathuradas Mohota College Of Sciences, Sakkardara Square, Nagpur-440009 India
  2. Professor, Kamla Nehru Mahavidyalaya, Sakkardara Square, Nagpur-440009 India
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Diabetes is the biggest health challenge in the 21st century. It is the major cause of blindness, obesity, ageing, heart disease, stroke, amputations and renal failure in the world. Although at present, the widely used method of self-monitoring of blood glucose (SMBG) involves determination of blood glucose concentration, with specific devices using chemical analysis of blood samples taken by puncturing the finger. These methods cause pain, time consumption, high costs and also carries potential risk of spreading infectious diseases. The main objective of this paper is to argue about the feasibility study and design issues of semi-invasive glucose measurement technique using optical reflectance method. The designing of entire instrument is based on the principle of the time required for the normal blood to clott. This clotting time is measured for the blood samples through optical reflection mode by using optical lens of a DVD writer. The recorded clotting time is calibrated in terms of sugar level present in the blood sample. Hence the instrument presented here will be useful in detecting the blood glucose level in the blood samples in a simple and easy to use method


diabetes; self-monitoring of blood glucose; semi-invasive technique; optical reflectance method.


The Embedded Technology is now in its prime and the wealth of knowledge available is mind-blowing. Embedded technology plays a major role in integrating the various functions associated with it. This needs to tie up the various sources of the department in a closed loop system. This proposal greatly reduces the manpower, saves time and operates efficiently without human interference. With the advent in technology, the existing systems are developed to have in built intelligence. There is no known cure for diabetes and patients rely on constant monitoring to maintain acceptable blood glucose levels. Depending on the type and severity of each case, therapy may include diet, exercise and other lifestyle changes, medication, and/or insulin injections. Insulin-dependent diabetics may need to inject themselves several times daily, with blood glucose testing before and/or after each meal. So far, most tests included actual blood tests, usually performed by pricking a finger and testing the blood using a portable device.
Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion, insulin action, or both [1]. Abnormally high levels of glucose can damage the small and large blood vessels, leading to: diabetic blindness, kidney disease, amputations of limbs, stroke, and heart disease [2]; also, excessive use of glucose-lowering medication such as insulin can cause hypoglycemia or abnormally low blood sugar. According to the Mexican National Health Information System there are more than 10 million people who are currently diagnosed with diabetes, of which 90% are type II diabetics, and it is the main cause of mortality in Mexico accounting for 13.6 percent of deaths in general [3]. Frequent monitoring of glucose concentration in diabetic patients is crucial for effective treatment because it can supply trend information that could help identify and prevent unwanted periods of hypo- and hyperglycemia [4]. Self monitoring of blood glucose is usually done in an invasive manner, which involves finger-stick testing which is painful to the patient and carries the risk of infection [5]. Recently, minimally invasive needle-based continuous glucose monitoring systems that can provide glucose measurements every 5 minutes or less have become available [4].


Several techniques such as diffuse reflectance spectroscopy, electrical impedance spectroscopy, Raman spectroscopy, among others, have been used for noninvasive glucose monitoring [6]; even though these studies were performed under different environments and clinical settings they can give a rough estimate of the sensitivity and reliability of current non-invasive glucose technology. These techniques present a Root Mean Square Error of reduction (RMSEP) that goes from 25 to 46 mg/dl [5,7,8,9,10,11,12,13,14]; which for a 126 mg/dl of Fasting Plasma Glucose level (FPG), which is considered a diagnostic criteria for diabetes [1], gives a relative concentration error higher than 5%. These studies rely on a single detection mechanism, but a combination of two or more detection mechanisms to reduce the error of prediction has not been investigated.
Near infrared (NIR) spectroscopy has been used to monitor changes of glucose concentration in tissue owing to the fact that a change of refractive index takes place in the extra-cellular fluid due to the presence of additional glucose, which causes a small change in the overall scattering properties of the tissue that can be detected by NIR spectroscopy [15]. It has previously been reported that glucose variations affect the electrical properties of cellular membranes [14]. This is due to specific reactions of blood and tissue cells to varying glucose concentrations, which changes the electrolyte balance across the membranes of blood and underlying tissue. These changes in the electrical properties of cellular membranes result in changes in the ac conductivity and tissue permittivity which can be measured using impedance spectroscopy [16].


Optical absorption techniques for quantification of glucose are based on selective absorption of light by the molecule which is described by the Beer–Lambert law:
I=Io e-ε CL
Here Io is the intensity of incident optical radiation, I is the transmitted intensity, e is the molar extinction coefficient in (mol/L)-1 cm-1 and is dependent on wavelength, C is the molar concentration, and L is the pathlength in cm. Measurements are generally reported in absorbance, A=log(I0 /I), such that the absorbance of several species is additive.
Optical absorption spectroscopy for glucose quantification has generally been restricted to either the mid infrared MIR or the near-infrared NIR spectral region. Fig.1 shows examples of both MIR and NIR optical absorption spectra for aqueous glucose after water subtraction. The MIR region of the spectrum ranges from 2.5 to 50 um (4000–200 cm- 1), and it is in this region that absorption bands due to fundamental stretching and bending modes of the molecule may be seen. For this reason, spectroscopy in the MIR or ‘‘finger-print’’ region is extremely useful for spectral identification of compounds. However, the magnitude of background absorption bands due to solution constituents like water severely limits the path length which can be used in MIR transmission spectroscopy to a few hundred microns or less. The near-infrared region which lies between 2.0 and 2.5 mm has become increasingly popular for aqueous glucose measurements. This region contains a relative minimum in the water absorption spectrum and readily identifiable glucose peak information. Glucose sensing using near infrared spectroscopy is by no means a simple problem. Glucose absorption peaks whose magnitude is relatively small compared to a large aqueous background spectrum often yield low signal-to-noise measurements. NIR spectral measurements are further plagued by a lack of repeatability. Near infrared spectra are sensitive to a host of factors including temperature, pH, and scattering. Additionally, in vivo measurements may be susceptible to differences in skin pigmentation, hydration, blood flow, probe placement, and probe pressure. Finally, it should be noted that the NIR spectrum of glucose is very similar to that of other sugars including, in particular, fructose which is often used by diabetics as an alternative to glucose. Despite these difficulties, near infrared methods have demonstrated significant promise in becoming a viable technique for non invasive glucose sensing. For this reason we used near infrared reflectance technique for measuring blood glucose semi-invasively.


The technology is based on the property of glucose to affect the scatter of light. Glucose changes the refractive index and hence the scattering properties of the organ (finger), leading to change in scattering coefficient, as a result concentration of glucose can be measured.
In the proposed glucose sensing system, transmission mode is used in the design of probe. As in case of transmission mode the light traverses the thumb/finger, and typically encounter many more glucose molecules along their paths than in the reflection mode as a result increased sensitivity can be achieved corresponding to glucose concentration. However in this scheme fine calibration depending upon the skin thickness and pigmentation is considered. The generalized Instrumentation scheme for noninvasive blood glucose sensing system is given in Fig.2.
This new technology allows for a non-invasive glucose-level blood testing. According to the company the new method is simple and accurate and may help people suffering from diabetes to live their lives in a slightly more comfortable manner without constantly worrying about being pricked with a needle. This proposed system introduces a non invasive type glucose measurement using non invasive type glucose sensor. The sensor is placed in human finger this sensor has two IR sensors the IR sensors pass infrared waves into the finger at different wavelength. According to the glucose level the IR waves get absorbed by the blood. The amplifier will amplify the reflected IR waves according to the obtained analog values the microcontroller will convert them into digital the digital values will be displayed in the PC. To interface PC with our microcontroller we need a level converter i.e., RS232 to TTL logic converter in PC we can view the values using VB.NET application.
Software Workflow in short:
1. Power up the system.
2. First detect the presence of finger via sensor & signal conditioning unit.
3. Then trigger out the IR output signal via transistorized driver circuits.
4. Wait for data input signal for logic change.
5. Record time for change.
6. Calibrate the time as required.
7. Compare the time record for various sugar ranges.
8. Send the message via GSM for abnormal ranges to concerned authorities.
9. Send data to PC if required for data logging purposes.


The present work is based on the principle of relation between blood clotting time and blood sugar level. The blood sugar level is detected by monitoring the clotting time of blood. As the blood sugar level increases in blood the clotting time required will also be more. Hence the instrument is calibrated depending on the blood clotting parameter, the results as obtained from the present work are represented in the following table:


The need for new glucose sensors in diabetes is now greater than ever. Although development of an acceptable, continuous & automatic glucose sensor has proven to be a substantial challenge, progress over the past several decades has defined sensor performance requirement & has focused development efforts on a limited group promising candidates. The advent of new glucose sensing technologies could facilitate fundamentally new approaches to the therapy of diabetes. Present paper demonstrates only fragments of a significant progress in its role study. Despite fulfilled significant scientific research work in this area there are a lot of blanks, problems to solve both in fundamental and practical issues of non invasive glucometer. Recent answers on puzzling questions mostly are limited via technical and methodological imperfections. Figuratively we are still at the beginning of the way, thorny and hard, and only productive cooperation of scientists may bring success.

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