Design of primary-secondary type precise metering drainage bag

The utility model discloses a mother-son type precise metering drainage bag design, which comprises a mother effusion bag, a mother bag liquid discharge piston, a son effusion bag, a son bag liquid discharge piston, an electronic PH meter and a drainage tube, the mother bag liquid discharge piston is arranged at the bottom of the mother effusion bag, the son effusion bag is arranged on one side of the mother effusion bag, the son bag liquid discharge piston is arranged at the bottom of the son effusion bag, and the electronic PH meter is arranged in the son bag liquid discharge piston. An electronic PH meter is arranged at the top of the effusion sub-bag, and the effusion sub-bag is fixedly connected with a drainage tube. The design of the primary-secondary type precise metering drainage bag solves the problems that an existing drainage bag is in a vertical ellipse shape, when hydrops is stored in the bag, the bag is in a flat ellipse shape, and medical staff cannot accurately meter the hydrops through appear