The technology behind the method
The technology is based on gas in scattering media absorption spectroscopy (GASMAS), developed by scientists at the division of Atomic Physics, Lund University. This method allows non-invasive measurement of gases such as oxygen and water vapour inside body cavities, including the lungs and sinuses. The method uses weak diode laser light and is not harmful to the body.
The method can be described as a type of “optical stethoscope”, where the optical probes are lightly pressed against the skin.
Gas monitoring in sinuses
The paranasal sinuses are cavities within the scull, which are ventilated through the nose. With GPX Medical technology it is possible to easily measure the amount of gas and the gas composition inside the sinus and gain clinically important information.
There is a definite need for accurate diagnosis of sinusitis. The current methods are often inaccurate or require expensive resources such as CT scanning. Sinusitis is one of the most common illnesses where patients are prescribed antibiotics. One study has shown that only half of the patients with diagnosed sinusitis had actual sinusitis, i.e. half of them had an incorrect diagnosis, and antibiotic drugs were unnecessarily prescribed in twice as many cases as was medically justified. Today’s high prescription of antibiotics contribute to the development of resistant bacteria. Thus, there is a great need to easily and accurately be able to make a correct diagnosis when patients experience problems with their sinuses, already at the primary care centres.
The feasibility of the technology has been shown in a clinical study where diagnostic correlation between CT scan and the GASMAS method was shown*.
The benefits with the GASMAS method for diagnostic support are several. The method is easy and quick and the result is presented without delay. As the technique does not involve ionizing radiation of the sinuses in the skull it is very safe for the patient. It also means that the healthcare sector can reduce costly and time-consuming investigations as well as decrease prescription of antibiotics.
*Non-invasive diagnostics of the maxillary and frontal sinuses based on diode laser gas spectroscopy. Lewander M, Lindberg S, Svensson T, Siemund R, Svanberg K, Svanberg S. Rhinology. 2012 Mar;50(1):26-32.