It in some embodiments, can be in the one or more operating conditions of detection and classification of negative pressure wound treating system, including detection wound bleeding. The system can reduce intensity or stopped treatment, distribution egative film pressure etc. to instruction is provided in detection blood. In certain embodiments, system can detecte one or more additional service conditions, for example, changing vacuum pressure, leak rate variation, the change of exudate flow rate, the change of chip flow rate, there are diffusate, water, etc.. The system is able to detect and distinguishes different operation condition and provides instruction or adopt remedial measures.
