Constant-pressure straw plug

The utility model relates to the technical field of medical instruments, and discloses a constant-pressure straw plug. The constant-pressure straw plug comprises a straw plug body matched with a straw; the straw plug body is provided with a constant pressure hole which penetrates through the straw plug body and is used for communicating the interior of the straw with the outside of the straw. Wherein the constant pressure hole is a round straight through hole, and the diameter of the constant pressure hole is larger than or equal to 0.4 mm and smaller than or equal to 0.8 mm. According to the embodiment of the utility model, when the temperature difference of the environment where the straw is located is greatly changed, the internal and external pressure borne by the straw plug is basically unchanged, so that the straw plug is reliably plugged on the straw and cannot be separated from the straw, and the safety of storing specimens in the straw is further improved. 本实用新型涉及医疗器械技术领域，公开了一种恒压麦管塞。该恒压麦管塞包括：与麦管配合的麦管