Suturing device
A suturing device is provided including a cannula, a needle pusher, a plunger, a spring, a shuttle, a button and a tether. The cannula includes a needle compartment defining a needle passage terminating in a distal opening. The needle pusher is provided in the cannula. Movement of the plunger from the extended position toward the depressed position compresses the spring. The spring exerts a biasing force on the shuttle in the advance direction when the plunger is in the depressed position. The button operably engages with the shuttle, and the spring biases the shuttle in the advance direction after the button is depressed, which pushes the needle pusher in the advance direction. The tether connects the plunger with the shuttle.
1. A suturing device comprising:
a cannula including a needle compartment defining a needle passage terminating in a distal opening;
a needle pusher provided in the cannula;
a plunger movable between an extended position and a depressed position;
a spring, wherein movement of the plunger from the extended position toward the depressed position compresses the spring;
a shuttle, wherein the spring exerts a biasing force on the shuttle in an advance direction when the plunger is in the depressed position;
a button operably engaged with the shuttle, wherein the spring biases the shuttle in the advance direction after the button is depressed, which pushes the needle pusher in the advance direction; and
a tether, which is a cable configured to sustain a tensile force, but not a compressive force, connecting the plunger with the shuttle in a manner such the tether pulls the shuttle away from the distal opening when the plunger is moved from the depressed position toward the extended position.
2. The suturing device of claim 1 , further comprising a handle connected with the cannula, wherein the spring and the shuttle are positioned inside the handle.
3. The suturing device of claim 2 , wherein the plunger includes a resilient finger for selectively engaging a shoulder in the handle when in the depressed position to maintain the plunger in the depressed position.
4. The suturing device of claim 3 , wherein the handle includes an opening aligned with the shoulder in the handle through which the resilient finger is accessible when the plunger is in the depressed position.
5. The suturing device of claim 1 , wherein the needle compartment and the needle passage are curved.
6. The suturing device of claim 5 , further comprising a needle positioned in the needle passage, wherein the needle includes a first end, which is pointed, and a second end, and further comprising a suture connected with the second end of the needle, wherein at least a portion of the suture extends through the distal opening when the needle is received in the needle compartment prior to the button being actuated.
7. The suturing device of claim 1 , wherein the cannula includes a proximal portion and a distal portion, the distal portion including a more proximal section, the needle compartment and a curved section, the more proximal section being located nearest the proximal portion of the cannula, and the curved section located between the needle compartment and the more proximal section.
8. The suturing device of claim 7 , further comprising a needle positioned in the needle passage, wherein the needle pusher is configured to operate through the curved section to push the needle in the advance direction through the distal opening.
9. The suturing device of claim 8 , wherein the needle passage extends along a linear needle passage axis.
10. The suturing device of claim 9 , wherein the more proximal section defines at least a portion of a needle pusher passage in which at least a portion of the needle pusher is received, wherein the portion of the needle pusher passage within the more proximal section extends along a linear proximal section axis, which is offset from and parallel with the linear needle passage axis.
11. The suturing device of claim 10 , wherein the needle pusher passage extends into the curved section.
12. The suturing device of claim 11 , wherein the needle pusher passage extends through a bend in the cannula located proximal to the curved section.
13. The suturing device of claim 11 , wherein the needle includes a first end, which is pointed, and a second end, and further comprising a suture connected with the second end of the needle, wherein at least a portion of the suture extends through the distal opening when the needle is received in the needle compartment prior to the button being actuated.
14. The suturing device of claim 1 , wherein the button includes a finger that operates as a spring that biases the button in a direction opposite a direction in which the button is depressed.
15. The suturing device of claim 1 , wherein the button is configured to return to an undepressed position after the tether pulls the shuttle through an opening in the button.