Resonance Near-Field Microwave Probing of Burn Wounds
- PDF / 663,597 Bytes
- 8 Pages / 612 x 792 pts (letter) Page_size
- 110 Downloads / 195 Views
ICATIONS OF RADIOTECHNOLOGY AND ELECTRONICS IN BIOLOGY AND MEDICINE
Resonance Near-Field Microwave Probing of Burn Wounds A. G. Galkaa, b, *, A. K. Martusevichb, D. V. Yanina, b, and A. V. Kostrova aInstitute b
of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia Volga Research Medical University, Nizhny Novgorod, 603005 Russia *e-mail: [email protected]
Received December 11, 2019; revised February 18, 2020; accepted March 11, 2020
Abstract—The development of the method of resonant near-field microwave probing as applied to the diagnosis of burn wounds is considered. Resonance sensors are developed and an impedance model of measuring systems is developed. It is experimentally established that the real part of the dielectric permittivity of the burn wound is less than in the region of the intact region. Also, the dependence of the electrodynamic parameters of wound tissues on the depth of burn penetration, which can be used for the express analysis of the degree of thermal damage, is established. DOI: 10.1134/S1064226920080033
INTRODUCTION For many decades, burns have remained one of the most common types of injuries, and there is still no downward trend in their frequency. About 500000 cases of thermal injuries are registered annually in Russia; in the general structure of injuries, they make up 6–8% and are the third most common injury in Russia. There are practically no sufficiently informative, noninvasive, and accessible methods in everyday practice for assessing the state of tissues in the area of a burn wound and in the near-wound zone. As a rule, to find the depth of tissue damage, a visual examination and clinical tests are performed, and the results depend on the experience and qualification of the doctor. Ultrasound examination, computer X-ray resonance, and magnetic resonance imaging are practically not used to diagnose the upper layers of the skin. The use of infrared thermal imaging studies allows us to obtain information about the upper layers of the skin by recording the infrared radiation emitted by the surface of the skin tissue [1–4]. In this case, the lower layers of the skin are not located by this method. Using laser Doppler flowmetry only indirectly (according to the indicator of the microcirculation of blood), it is possible to assess the penetration depth of the burn [5, 6], which is not sufficient for a full description of the state of the wound and the tissues surrounding it. It should be noted that the high-tech methods mentioned above are not applicable for the daily monitoring of processes in the skin tissues due to the following reasons: radiation exposure, complexity and cost of equipment, and duration of procedure, as well as its cost. The technique for assessing burn damage by measuring tissue conductivity is known [7]; however,
it has still not been widely applied. Its main drawback is related to the large area of electrodes needed to reduce the electrode–skin transition resistance, and, as a consequence, low resolution. In such a system, an electric
Data Loading...
