The invention relates to the technical field of
medical instruments, in particular to a
breathing critical patient off-line-free closed microscopic examination
sputum suction
breathing circuit connector which comprises a novel connector body, a trachea cannula connector is fixedly connected to the outer side of the novel connector body, a connecting
pipe is fixedly connected to the upper end of the novel connector body, and an adjusting
assembly is arranged in the connecting
pipe. A connecting opening is formed in the adjusting
assembly, and a protection
assembly is arranged on the outer side of the connecting
pipe. Through the arrangement of the adjusting assembly, when a critical patient clinically needing
tracheal intubation for
breathing ventilation treatment is subjected to microscopic examination or
sputum suction at any time according to clinical requirements, the adjusting ring is rotated to drive the
pinion and the rotating shaft to rotate through the inner gear, so that the multiple sets of limiting blocks rotate synchronously, the inner
diameter is adjusted to the corresponding size, ventilation does not need to be stopped, and operation is convenient. Microscopic examination or
sputum suction operation can be carried out without pulling out a connector of the breathing
machine, continuous ventilation treatment of the breathing
machine is guaranteed, and the danger of
oxygen deficit is avoided.