The invention relates to a
blood filtering and dialyzing
system capable of filtering and separating CTCs of a
human body from circulation blood of the
human body. The
blood filtering and dialyzing
system serves as an
adjuvant therapy device and is suitable for
breast cancer patients with the positive CTCs. The
blood filtering and dialyzing
system is characterized in that in a
pipe channel of an existing blood filtering and dialyzing device, a filter composed of biological membranes 8 micrometers in hole
diameter is additionally arranged. The filter is a cylinder and taper double-layer
barrel, and the blood dialyzing instrument
artery end is communicated with an inner layer, wherein the inlet
radius is r, and the inner layer is composed of biological membranes 8 micrometers in hole
diameter; the blood dialyzing instrument
vein end is communicated with an outer layer, and the outer layer is made of medical plastic. According to the filter, the heights of a cylinder in the inner layer and a cylinder in the outer layer are equal, the length is controllable in the scope
ranging from 10 cm to 20 cm, the inner
diameter is 4.472 r, the outer diameter is 4.48 r, the height of an inner taper is 4.472 r, the height of an outer tapper is 4.48 r, and the membrane hole distribution density is 100000 / cm<2>.