Tap water irrigation for burn injury.

Dear Editors, Burn injury can be fatal, disfiguring and incapacitating. Therefore, well-timed and appropriate management could be more than helpful, which primarily consists of debridement cleaning and dressings. These are important aspects of wound care because they can prevent the formation of eschar, which is a moist and protein-rich avascular substance that encourages microbial growth. Inferentially, debridement cleaning can forbid bacterial growth (infection), as well as promote migration of immune cells and distribution of systemically administered antibiotics. Irrigation to the burn injury wound can achieve effective debridement cleaning (Figure 1); its ‘micro-debridement’ effect to shed devitalised tissue can be maximised by tap water with a pressure of about 45 psi, which is superior to antibacterial solutions in removing debris and bacteria (1) . Accordingly, we used tap water with temperature lower than individual body temperature to irrigate the wounds twice a day for 5minutes from the first to the fourth day, followed by warm water, which was 2∘C higher than body temperature, until the wounds healed. Higher irrigation pressure can slough off debris and prevent eschar formation. Cold water irrigation for the first few days prevents the wounds from secondary burn injury, while warm water ameliorates local circulation (2); thus, the overall procedure boosts wound healing and protects the wound from the ongoing inflammatory process. Both cold and warmwater work accordingly to accelerate the healing process. Undeniably, tap water may contain low concentrations of potentially pathological bacteria and varying amounts of small particulate matter. But it has been proven that wounds become infected when they contain more than 105 bacteria per gram of tissue (3). According to the latest updated data from the Taiwan Water Corporation, microbiological cultures of tap water samples in Taichung city are reported to have bacterial counts <1CFU/ml and the concentration of Escherichia coli is <1CFU/100ml. Tap water contains insufficient number of bacteria