The method of ultrasonic treatment of infected wounds and its implementation

A process of surgical infection suppression using a low-frequency ultrasound with the operating frequency of 26.5 kHz and the concentrator end surface displacement amplitude of 40-45 pm was developed at BMSTU. The proposed method of ultrasonic treatment and the device for its implementation is protected by the patent of the Russian Federation № 20822467 dated 27.06.1997. The proposed method of treatment suggests intensification of the ultrasound cavitation effect on the bacterial flora by accessory physicochemical factors: antiseptics of low concentrations (0.1% hydrogen peroxide solution), excessive external static pressure (in the range of p = 0.05...0.15 MPa) and optimum temperature of insonified solution (in the range of37-42 °C). For this method to be implemented in the clinical conditions, a special device was developed. The device consists of a chamber with a pressure sensor and two openings for injecting a drug solution and introducing an ultrasonic waveguide. The open end of the camera is fixed on the surface of the treated wound; then it is fastened onto the patient’s body with the bandage straps. Successful testing of the method in Burdenko Main Military Clinical Hospital resulted in reducing the duration of hospital stay significantly. It is reasonable to apply both the developed method and the device for treating soft tissue injures and gunshot wounds, in particular, which have such features as a rugged topography of the wound tracts, considerable internal human tissue defects as well as extensive microbial invasion.

References

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