PURPOSE: A device for removing a focus is to reduce dependence on surgeon, shorten time for treating and protect healthy tissue of body. CONSTITUTION: A device, having a supply capillary(11) provided with a supply channel(14) for hydraulic flow and a discharge capillary(12) provided with a discharge channel(13) for suction flow and open for a focus, is arranged to functionally connect the channel (14) of the capillary(11) to the discharge channel(13) of the capillary(12). The outer capillary(11) coaxially receives the inner capillary(12) to form the channel(14) between them, and a throttle ring cap(17) at the end of the capillary(12) enables the channel(14) to communicate with the channel(13) of the capillary(12).
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