Negative pressure wound therapy (NPWT) is a technique that enhances the healing process by applying negative pressure on the chronic or acute wounds. It has been diffusely adopted for treatment of trauma wound, chronic wound, or deep sternal wound infections due to its excellent healing result. However, there were several injuries and death cases caused by the unstable pressure generated from the wound treatment. This paper aims to design a stable negative pressure regulator by using fuzzy logic controller (FLC) .The proposed control approach is able to regulate the negative pressure within the desired range for healing process. The effectiveness of FLC pressure controlling and Boolean logic controller method is validated by experiments. In conclusion, it is proven that the proposed method is able to provide a safe wound treatment in future.
Negative pressure wound therapy is effective against slow-healing wound or diabetic wound but such therapy has caused 174 injuries and 12 deaths due to excessive bleeding resulted from unstable pressure control of the device. If the device exerts excessive pressure on the wound area, the pressure may tear the wound area apart and cause haemorrhage. If the device exerts inadequate pressure on the wound area, it slows down the healing process of the wound area as the pressure is not sufficient to induce mechanical stress that promotes cell growth. In addition, if the pressure control of the device remains uncontrolled, patients may feel uncomfortable and pain due to sudden spike or reduction of the pressure.
to
generate negative pressure for the wound healing process. The negative pressure level is
regulated by the Fuzzy Logic Controller (FLC) which the pressure level will be controlled at the
desired setting level.