Abstract: Devices and systems compare incoming and outgoing gas and fluid flowrate measurements with each other and with additional physiological measurements of a patient to trigger an alarm to healthcare providers of an issue with a patient. The device can include a sensor that measures incoming flow of gas and fluid and a sensor for measuring the outgoing flow of gas and fluid (for example, urine) from the patient. The sensors can be connected to wireless transmitters to send data describing the flow to a computer processor. The computer processor receives the data from the processors and generates an alarm based on comparisons between the input flow and the output flow. The devices and system can be used to detect issues in a patient by monitoring a flow of intravenous fluids being administered to an amount of urine being generated. The devices and system can be used to detect issues in a patient by comparing a flow of gas being administered to a patient compared to blood gas content in the patient.