Puncture device, puncture system, operation method of puncture device, and usage method of guidewire

1 . A puncture device comprising:

an elongate sheath, defining a longitudinal axis direction;

a needle tube, carried in the sheath, the needle tube configured to be movable in the longitudinal axis direction;

a needle slider, connected to the needle tube, the needle slider comprising a nail;

an inner tube, carried in the needle tube, the inner tube defining a lumen configured to receive a guide wire;

a tube slider, connected to the inner tube, the tube slider configured to support the inner tube such that the inner tube is movable in the longitudinal axis direction; and

a locking member comprising a first concave portion and a second concave portion, wherein:

the second concave portion is disposed more proximally than the first concave portion;

the first concave portion and the second concave portion are configured to lock the needle slider relative to the tube slider in a first state and in a second state by engaging with the nail;

in the first state, a distal end of the inner tube is positioned in the needle tube by engaging the first concave with the nail; and

in the second state, the distal end of the inner tube is positioned to protrude out from the needle tube by engaging the second concave with the nail.

2 . The puncture device according to claim 1 , wherein the needle slider further comprises:

a nail configured to engage with the first member and the second member, wherein the nail extends laterally or radially with respect to the inner tube; and

an arm configured to change a lateral or radial position of the nail and configured to disengage the nail from the locking member.

3 . The puncture device according to claim 2 , wherein:

the nail includes a first surface and a second surface proximally located relative to the first surface;

the first surface is toward a distal end of the needle tube;

the second surface is toward a proximal end of the needle tube; and

the first surface and the second surface are inclined along the longitudinal axis direction.

4 . The puncture device according to claim 2 , wherein:

the arm includes an inner surface located inside the needle slider; and

a distance (D 2 ) between the longitudinal and the inner surface at a proximal end of the arm is larger than a distance (D 1 ) between the longitudinal axis and the inner surface at a distal end of the arm.

5 . The puncture device according to claim 1 , wherein:

the tube slider is configured to attach an injection device for injecting a contrast medium into the inner tube; and

the locking member is configured to lock the needle slider relative to the tube slider such that the inner tube is in the first state when the tube slider attaches the injection device.

6 . The puncture device according to claim 1 , wherein:

the locking member includes a fourth opening, the fourth opening is configured to lock the needle slider in the second state;

the tube slider includes a first opening, the first opening is configured to penetrate in a direction perpendicular to the longitudinal axis;

the inner tube includes a second opening, the second opening is configured to penetrate in a direction perpendicular to the longitudinal axis;

the needle tube includes a third opening, the third opening is configured to penetrate in a direction perpendicular to the longitudinal axis; and

the fourth opening, the first opening, the second opening, and the third opening are located such that at least a part of the fourth opening, the first opening, the second opening, and the third opening overlap along the longitudinal axis.

7 . A puncture system comprising:

a guide wire; and

a puncture device comprising:

a sheath configured to extend in a longitudinal axis direction;

a needle tube, carried in the sheath, the needle tube configured to be movable in the longitudinal axis direction;

a needle slider connected to the needle tube, the needle slider comprising a nail;

an inner tube carried in the needle tube, the inner tube defining a lumen configured to receive the guide wire;

a tube slider connected to the inner tube, the tube slider configured to support the inner tube such that the inner tube is movable in the longitudinal axis direction; and

a locking member comprising a first concave portion and a second concave portion, wherein:

the second concave portion disposed more proximally than the first concave portion;

the first concave portion and the second concave portion are configured to lock the needle slider relative to the tube slider in a first state and in a second state by engaging with the nail;

in the first state, a distal end of the inner tube is positioned in the needle tube by engaging the first concave with the nail; and

in the second state, the distal end of the inner tube is positioned to protrude from the needle tube by engaging the second concave with the nail.

8 . The puncture system according to claim 7 , further comprising:

an injection device for injecting a contrast medium into the inner tube, wherein the injection device is configured to attach to the tube slider.

9 . A method for using a guide wire, the method comprising:

forming a first hole on a first lumen of a body by a needle tube;

forming a second hole on a second lumen of the body by the needle tube;

disposing a tip of the needle tube into the second lumen;

locking the needle tube relative to an inner tube in a locked state such that a tip of the inner tube is more proximal than the tip of the needle tube, the tip of the inner tube is configured to be positioned in the needle tube;

injecting a contrast medium into the inner tube with maintaining the locked state;

unlocking the locked state;

protruding the inner tube from the tip of the needle tube after unlocking the locked state;

inserting the guide wire into the second lumen from the tip of the inner tube; and

leaving the guide wire extending from the first lumen to the second lumen by removing the needle tube and the inner tube from the first hole and the second hole.

10 . The method according to claim 9 , wherein:

the locking includes locking the needle tube relative to the inner tube including by locking a tube slider, configured to control advancing and retreating of the inner tube, and a needle slider, configured to control advancing and retreating of the needle tube, in a state that the tip of the inner tube is disposed distal than the tip of the needle tube.

11 . The method according to claim 9 , wherein:

the locking includes locking the needle tube relative to the inner tube including by locking a needle slider, configured to control advancing and retreating of the needle tube, relative to a tube slider, configured to control advancing and retreating of the inner tube, in a state that the inner tube protrudes from the tip of the needle tube.

12 . The method according to claim 10 , further comprising: moving the tip of the inner tube to a proximal end side relative to the tip of the needle tube by unlocking of the needle tube relative to the inner tube and moving the tube slider to a proximal end side relative to the needle slider after locking of the needle tube relative to the inner tube in a state in which the inner tube protrudes from the tip of the needle tube.