A system for monitoring and controlling negative pressure wound therapy for treating a wound on a person's body, the system comprising: means for maintaining reduced air pressure in an airspace over the wound; a canister for receiving fluid drained from the wound; a fluid sensor for sensing a quantity of fluid in the canister and generating a fluid signal based thereon, the fluid signal being indicative of a level of the fluid in the canister and a rate of filling of the canister; a microcontroller in electrical communication with the means for maintaining reduced air pressure and the fluid sensor, the microcontroller for controlling the means for maintaining reduced air pressure based at least in part on the fluid signal; a mobile communication device comprising: a microprocessor in electrical communication with the microcontroller; and a wireless transceiver in electrical communication with the microprocessor, and a negative pressure wound treatment service provider computer in communication with the wireless transceiver of the mobile communication device via one or more communication networks and in communication with a healthcare provider computer via the one or more communication networks, wherein the microprocessor of the mobile communication device executes software instructions to generate control signals that are provided to the microcontroller to control the means for maintaining reduced air pressure to maintain one or more of a continuous reduced air pressure state or an intermittent reduced air pressure state in the airspace over the wound, and wherein the microprocessor of the mobile communication device executes software instructions to monitor signals from the fluid sensor and generate one or more of: a fluid alarm message if the fluid signal indicates that the fluid level in the canister or the rate of filling has risen above a maximum threshold; wherein the wireless transceiver of the mobile communication device transmits the fluid alarm message to the negative pressure wound treatment service provider computer via the one or more communication networks, and wherein the negative pressure wound treatment service provider computer sends an alert communication to the healthcare provider computer via the one or more communication networks based on the fluid alarm message transmitted from the wireless transceiver. means for maintaining reduced air pressure in an airspace over the wound; a canister for receiving fluid drained from the wound; a fluid sensor for sensing a quantity of fluid in the canister and generating a fluid signal based thereon, the fluid signal being indicative of a level of the fluid in the canister and a rate of filling of the canister; a microcontroller in electrical communication with the means for maintaining reduced air pressure and the fluid sensor, the microcontroller for controlling the means for maintaining reduced air pressure based at least in part on the fluid signal; a mobile communication device comprising: a microprocessor in electrical communication with the microcontroller; and a wireless transceiver in electrical communication with the microprocessor, and a microprocessor in electrical communication with the microcontroller; and a wireless transceiver in electrical communication with the microprocessor, and a negative pressure wound treatment service provider computer in communication with the wireless transceiver of the mobile communication device via one or more communication networks and in communication with a healthcare provider computer via the one or more communication networks, wherein the wireless transceiver of the mobile communication device transmits the fluid alarm message to the negative pressure wound treatment service provider computer via the one or more communication networks, and wherein the negative pressure wound treatment service provider computer sends an alert communication to the healthcare provider computer via the one or more communication networks based on the fluid alarm message transmitted from the wireless transceiver.