Disclosed are a microcatheter applied to a branch blood vessel and a method for supporting an embolic coil during insertion of an embolic coil using the same, wherein the microcatheter applied to the branch blood vessel according to an embodiment of the present application includes an open distal end from an open proximal end A micro conduit in the shape of a tube forming a passage extending into a first guide wire capable of providing a first condition and a second guide wire capable of providing a second condition inserted along the passageway from the proximal end such that the distal end protrudes through the side hole.
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