Device for measuring sizes of body surface tumors or limbs

The invention provides a device for measuring sizes of body surface tumors or limbs, and belongs to the field of medical instruments. Aiming to solve the problems that errors of calipers for measuring sizes of body surface tumors or limbs are large, and the sizes of the body surface tumors or the limbs are hard to measure because of abnormal shapes, the invention provides a measuring device based on the principle of a communicating vessel and drainage, the measuring device is simple in structure, can obtain more accurate result with a low cost. The adopted technical essential points are that the equivalent volume of displacement of an object to be measured can be converted in to a container having a smaller internal diameter through a flexible tube according to the principle of a communicating vessel, an accurate measured value can be obtained according to the distance of liquid level changes. The device can be mainly used for measuring intravital animal body surface tumors, animals' or human limbs, animals' tails and various dissected organs. The device is simple in structure, low in cost, resource saving and wide in scope of application.