METHOD FOR RECORDING AND COUNTING THE NUMBER OF DROPS IN AN AUTONOMOUS SYSTEM FOR OPTICAL MONITORING OF INTRAVENOUS INFUSION Russian patent published in 2018 - IPC A61M5/14 

FIELD: medicine.

SUBSTANCE: invention relates to medicine and is intended for the recording and counting of drops in an autonomous system for the optical monitoring of intravenous infusion. According to the method, an optical sensor system is used that includes one optical receiver and a pair of light emitters in the infrared range, the system has a phase-separated frequency of infrared radiation and a narrow-band filter of a multiple frequency. Have a receiver and emitters outside the flask-dropper, receiver – on the diametrical line of the bulb, and the radiators – on opposite sides and at the same distance from it on the other side of the bulb, at a distance of 6 mm ± 2 mm apart. Drops are counted incrementally with the accumulation of the total result and the periodic transmission of information on the number of drops and the current infusion rate, namely, the ratio of the number of drops to the time interval that has elapsed since its inception. Information is transmitted in the form of an electronic message to the Wi-Fi network, with the possibility of receiving a nurse in the software application on the mobile device. Single drops recorded during the fall along the trajectories are recorded, close to the central axial line of the dropper flask, which obscure one of the light fluxes from the radiators, in the absence of a light signal at the receiver. In order to exclude the mutual influence of the radiators, the optical signal is formed with the help of radiators discretely at equal intervals with a duty cycle of 0.25 and a phase shift of 180°. Provide a frequency of emission of light signals generated by radiators, 19 kHz, and the frequency of the receiver of the light flux is 38 kHz.

EFFECT: technical result consists in providing counting when installing a dropper with a deviation from the vertical.

1 cl, 1 dwg