The utility model discloses a deep venous
catheter, which belongs to the technical field of
medical instruments and can effectively prevent air from entering blood vessels. Comprising a
catheter body, a multi-way tube seat, a plurality of
branch tubes, a plurality of connectors and a plurality of switch valve assemblies, the multi-way tube seat comprises a plurality of input ports and an output port, and the output port is communicated with one end of the
catheter body; each
branch pipe is communicated with the corresponding input port and comprises a second
pipe section; each connector is arranged on the corresponding
branch pipe; each switch valve
assembly is arranged in the corresponding second pipe section and comprises a first disc body and a first sealing
assembly, the
radius of the first disc body is equal to the inner
diameter of the second pipe section, the central axis of the first disc body coincides with the central axis of the second pipe section, and a first stepped through hole comprising a first hole section and a second hole section is formed in the first disc body; the
radius of the first hole section is larger than that of the second hole section, the second hole section is located between the connector and the first hole section, and the first sealing
assembly is used for controlling connection and disconnection of the first hole section.