Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Blood test - without blood testing

09.07.2007
A “bilirubin analyzer” has been developed to measure the bilirubin level in blood in a noninvasive way without piercing the skin. The device, shown at the “High Technologies of the 21st Century” exhibition in Moscow, attracted the attention of both visitors and specialists.

Specialists at the Scientific Research Institute “AGAT”, located in the town of Zhukovsky, in the Moscow Region, applied a small device to the inside of the palm and identified the required value with a touch of a button. The small device, the size of a telephone receiver, is a two-channel spectrophotometer, which determines the absorption or irradiation of light of a definite wavelength. It operates as follows.

A fibreoptic block is tightly pressed to the skin, usually on the inside of the palm because the skin is thinner here and has less pigmentation. The flashbulb light travels along the optical fiber onto the body surface, where it is partly reflected and partly absorbed by the top layers of the skin and also by the blood. Bilirubin absorbs and reflects specific wavelengths of light which can then be measured.

This reflected, or more precisely, diffusely reflected (i.e. dispersed by tissue) signal travels via the other optical fibre into photoelectric receptors. It then passes through two channels with a light filter set at 460 and 550 nanometer wavelengths. Two channels allow comparison of reflected radiation at two wavelengths. The device rejects the background radiation to leave behind the bilirubin signal.

The device can determine the bilirubin concentration in the blood from zero to 400 micromoles per litre, where 400 is the highest value possible in cases of extreme jaundice. The device including batteries weighs 470 grams and takes just over a minute to measure one reading and prepare for the next. This analyzer is ideal to check large groups of the population for jaundice and as no injections are involved, there is no opportunity to transmit infections between patients.

Nadezda Markina | alfa
Further information:
http://www.informnauka.ru

More articles from Health and Medicine:

nachricht Researchers release the brakes on the immune system
18.10.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht Norovirus evades immune system by hiding out in rare gut cells
12.10.2017 | University of Pennsylvania School of Medicine

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>