| 摘要 |
A device preventing the backflow of blood, and a medical infusion device. The device preventing the backflow of blood comprises a cavity (100); an air discharge hole (10), a liquid inlet port (20) and a liquid discharge port (30) are arranged on the cavity (100), and a liquid storage tank (40) and a siphon channel (50) are arranged within the cavity (100); a permeable hydrophobic water-blocking membrane (15) is arranged at the position of the air discharge hole (10); the liquid storage tank (40) is relatively located above the siphon channel (50), and an upper face of a tank port of the liquid storage tank is provided with a hydrophilic liquid-stopping drug solution filtration membrane (45), so that a liquid storage chamber (43) is formed; the liquid discharge port (30) is arranged inside the liquid storage chamber (43), and the liquid inlet port (20) is arranged outside the liquid storage chamber (43); the siphon channel (50) is provided with a first gap (51), and is connected to an outer surface of the hydrophilic liquid-stopping drug solution filtration membrane (45) via the first gap (51). The device is simple in terms of structure, controllable in terms of time, practical and efficient. |
