Patent ID: 8617112

Claim:
An indwelling needle assembly, comprising; an inner needle having a sharp point at a distal end; an inner-needle hub fixed to a proximal portion of the inner needle; a hollow outer needle in which the inner needle is inserted; an outer-needle hub fixed to a proximal portion of the outer needle, the outer-needle hub possessing an axis; a protector detachably connected to the outer-needle hub a finger hold connected to the outer-needle hub or the protector at a base end of the finger hold and terminating at a free end remote from the base end, the finger hold being pressable by a finger to move the outer needle in the distal direction relative to the inner needle; wherein the finger hold projects in an upward direction, the finger hold comprising an inclined plate which is inclined toward a proximal side, the inclined plate possessing: (i) a finger hold surface on which to place a finger, the finger hold surface being on the proximal side of the inclined plate, the finger hold surface possessing a first end adjoining the base end of the finger hold and a second end adjoining the free end of the finger hold; and (ii) a distal surface positioned on an opposite side of the inclined plate than the finger hold surface, the distal surface possessing a first end adjoining the base end of the finger hold and a second end adjoining the free end of the finger hold; the second end of the finger hold surface being proximal to the first end of the finger hold surface, and the second end of the distal surface being proximal to the first end of the distal surface; the first end of the finger hold surface being angled at 45Â° to 75Â° with respect to the axis of the outer needle; wherein the free end of the finger hold is positioned proximally of the first end of the finger hold surface; and wherein when the outer needle is moved in the distal direction relative to the inner needle, a force in an upward direction relative to the axis of the outer needle can act on the finger hold.