A drainage device specifically for draining chronic subdural hematoma

摘要

The present invention relates to a drainage device, which comprises a tubular reservoir (100) having a flexible wall (1), a rigid cover (3) and a rigid bottom (2), and a cover. It has at least one spring (4) that applies a force pushing the (3) and the bottom (2) away from each other, and the cover (3) is movable in the direction of the bottom (2) to place the spring in the initial position It is. According to the invention, the device comprises one or more magnets (11, 12), which exert additional forces on the reservoir (100) and the resulting cover (3 ) And the bottom (2) in a direction away from each other, the force is configured to be substantially constant over a part of the spring stroke. [Selection] Figure 3