FIELD: medicine.SUBSTANCE: invention relates to medical devices. Apparatus includes measuring unit. Measuring unit comprises: a conduit made of a material having a low thermal conductivity, supporting at least two thermistors wherein an upstream thermistor serving as a compensation thermistor, and a downstream thermistor located as far downstream as possible from said upstream thermistor and pre-heated to a temperature which is warmer than the fluid temperature to be metered means for applying a constant small electric voltages to said thermistors to enable generation of an electric signals, at that, said signals flowing through said upstream thermistor being sufficiently low to prevent substantial heating of said thermistor. Adaptor is arranged to fit and retain contact with the nipple area of the breast, attached to an upstream extremity of said short conduit. Baby nipple is attached at a downstream extremity of said conduit. Control and display unit is operatively connected to the measuring unit, including means for calculating the difference between the electrical resistance of said upstream and said downstream thermistors and then calculating the flow rate based on the electrical signal difference being a function of the body fluid flow rate, and then calculating the accumulated amount of fluid based on the internal cross section of said conduit in which said fluid flows and comprises a display for displaying the flow rate and displaying the accumulating volume of body fluid being metered.EFFECT: invention enables to determine the flow rate and volume of body fluid during feeding.6 cl, 6 dwgИзобретение относится к медицинской технике. Устройство включает измерительное устройство. Измерительное устройство содержит: выполненный из материала с низкой теплопроводностью короткий трубопровод, имеющий по меньшей мере два термистора при этом входной термистор выполняет функцию компенсирующего термистора, а выходной термистор расположен как можно дальше в направлении п
