Disclosed is a method of real-time monitoring of low urine volume in the bladder and an automatic alarm, which includes the following steps: 1) tightly attaching multiple test electrodes to the test sites of a patient, and real-time monitoring of an electrical impedance value of the bladder with a bio-electrical impedance measurement device according to a bio-electrical impedance technique (101) 2) by means of a digital filter algorithm, selecting suitable parameters and removing interference signals to improve the signal-noise ratio of the electrical impedance, and real-time updating of the maximum value of the electrical impedance and calculating an impedance threshold value and change rate thereof (102) 3) according to medical knowledge and clinical experience, establishing an expert diagnostic system to approximately process the impedance threshold value and the change rate of the threshold value, deciding on an approximate rule and then effecting an automatic urination alarm according to the approximate rule so as to remind the patient of the need to urinate in time or to inform a medical worker (103). By employing this method, the urine volume in the bladder can be dynamically predicted accurately and in real time and a urination alarm is effected, so the patient can be reminded of the need to urinate in time, or the pathogenic conditions can be monitored remotely via a wireless network, which is more convenient and safer to operate and has a strong anti-interference capability.La présente invention concerne un procédé de surveillance en temps réel dun faible volume durine dans la vessie et une alarme automatique, qui comprend les étapes suivantes : 1) la fixation serrée de multiples électrodes de test aux sites de test dun patient, et la surveillance en temps réel dune valeur dimpédance électrique de la vessie avec un dispositif de mesure dimpédance bioélectrique selon une technique dimpédance bioélectrique (101) 2) la sélection, au moyen dun algorithme de f
