Ramathibodi Instill-Soak-Suction System (RISS System) for Negative Pressure Wound Therapy with Instillation
Preedee Saeheng MD*, Chalermpong Chatdokmaiprai MD*
Affiliation : * Division of Plastic and Maxillofacial Surgery, Department of Surgery, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
Background : Negative pressure wound therapy with instillation combines sub-atmospheric pressure with a topical irrigation
solution. The antiseptic solution is delivered to the wound, soaked for a period of time, and negative pressure is applied to
cleanse the wound. Cycles are then repeated. It has been reported as a novel effective adjunctive wound treatment for infected
or contaminated wound with positive clinical outcomes. The commercial device has not been available in Thailand.
Objective : The present study is to evaluating safety and effectiveness of the system, instillation soaking and suction in wound
therapy. In addition, previous the study also the information in clinical use.
Material and Method: An automatic device for controlling cycles of negative pressure wound therapy with instillation was
designed and built. The Ramathibodi Instill-Soak-Suction system (RISS system) was created by using the device with basic
hospital supplies. The system was tested with multiple artificial wound models to confirm safety and consistent function. Then
it was applied to two patients who had positive aerobic culture traumatic wound. The data collected from the patients were
reported.
Results : RISS system tested with the wound models could work properly throughout seven days of trial period without any
mechanical failure. The good distribution of instillation solution was seen over the surface of artificial wound models. The
clinical use in two patients with colonized traumatic wounds showed improvement of aerobic culture from wound beds and
reduction in wound sizes with no complications caused by the device or system failure.
Conclusion : We invented a reliable automatic device and developed the RISS system that can provide negative pressure
wound therapy with instillation as an adjunct local wound therapy. The preliminary use in two clinical cases showed
improvement of aerobic culture results and reduction in wound surface area.
Keywords : Negative pressure wound therapy
