An apparatus for artificial lung ventilation, comprising: a first channel configured to supply a first gas； a second channel configured to supply a second gas； a bypass element configured to supply a portion of the first gas and a portion of the second gas, the bypass element comprising a plurality of ribs located next to the bypass tube in one of the first channel or the second channel, and the many ribs contains essentially parallel rectilinear ribs made so that they extend across and at an angle from relative to the cross section of the corresponding one of the first or second channel, ensuring that the plurality of ribs do not intersect the corresponding path of the bypass tube in the corresponding channel, wherein said plurality of ribs provides a substantially laminar fluid flow near the bypass tube. 2. The mechanical ventilation apparatus according to claim 1, wherein the first gas contains air and the second gas contains oxygen. The mechanical ventilation apparatus according to claim 1, wherein the bypass element is in fluid communication with a flow sensor or a volume sensor. The artificial lung ventilation apparatus according to claim 1, wherein the first gas contains air and the second gas contains oxygen, and the bypass tube is located in the second channel and is configured to move oxygen from the artificial lung ventilation apparatus, and in which the bypass element further comprises another set essentially parallel rectilinear ribs located next to another bypass tube, and the corresponding tube is located in the first channel and is made possible1. Аппарат искусственной вентиляции легких, содержащий:первый канал, выполненный с возможностью подачи первого газа；второй канал, выполненный с возможностью подачи второго газа；обходной элемент, выполненный с возможностью подачи части первого газа и части второго газа, причем обходной элемент содержит множество ребер, расположенных рядом с обходной трубкой, в одном из первого канала или второго канала, причем
