Patent ID: 9456844
Filing Date: 2016-10-04
CPC Classification: A61B

Claim Text:
1. An atherectomy device to which a catheter having a tubular body having an opening in a side wall and a cutter which is provided movably in an axial direction in the tubular body is connected, the atherectomy device, comprising: a direct-current motor which rotates the cutter; a three-terminal regulator which has an input terminal, an output terminal, and an ADJ terminal and in which one of a pair of input terminals of the direct-current motor is connected to the output terminal; a partial pressure resistor connected between the output terminal and the ADJ terminal of the three-terminal regulator; a resistor group having a plurality of fixed resistors or a plurality of variable resistors whose resistances are different from each other and one end of which is connected to the ADJ terminal; a change-over switch which selectively connects one of the other ends of the plurality of fixed resistors or the variable resistors of the resistor group to the other input terminal of the direct-current motor; a socket to which a battery is attached; and a detection circuit which detects a voltage of a battery, wherein the detection circuit has: a partial pressure resistor circuit which divides the voltage of the battery to output the divided voltage; a switching element which is turned ON by an output voltage of the partial pressure resistor circuit; and a notification portion which performs notification when the switching element is turned ON, wherein one of the partial pressure resistors constituting the partial pressure resistor circuit is a variable resistor.