End effector for wound closure device
View Patent ↗A suture device with a composite end effector, the composite end effector including a suture with an unmodified fixation element at a distal end and an overlying attachment piece disposed over the proximal end of the unmodified fixation element. The resulting composite end effector has improved strength and avoids the need for affixation methods such as welding or chemical affixation.
1. A suture device comprising:
a. an elongated suture body having a proximal end and a distal end; and
b. a composite end effector at said distal end, said composite end effector comprising:
i. a fixation tab having a length, width and thickness, and
ii. an overlying attachment piece, comprising a tab opening with a length, width and thickness,
wherein the overlying attachment piece further comprising a distal end and a pair of longitudinal slits terminating at the distal end of the overlying attachment piece,
wherein at least a proximal end of the fixation tab is inserted into said opening of said overlying attachment piece such that the proximal end of the fixation tab abuts a proximal wall of said overlying attachment piece while at least a distal end of the fixation tab extends axially outwardly from the overlying attachment piece and the fixation tab extends laterally outwardly from the overlying attachment piece through the pair of longitudinal slits.
2. The suture device of claim 1 , wherein said fixation tab is integrally formed with the distal end of the elongated suture body such that the fixation tab and the elongated suture body are formed from the same material and have a unitary construction.
3. The suture device of claim 1 , wherein said overlying attachment piece has a distal end and a proximal end, with a suture opening at the proximal end and the tab opening at the proximal end.
4. The suture device of claim 3 , wherein the suture opening has a smaller width than the tab opening.
5. The suture device of claim 1 , wherein said suture body comprises a plurality of retainers along at least a portion of its axial length.
6. The suture device of claim 5 , wherein said retainers are formed from stamping said suture and retainers from a preform ribbon.
7. The suture device of claim 1 , wherein said overlying attachment piece and said fixation tab are joined to each other via friction fit.
8. The suture device of claim 7 , wherein said overlying attachment piece and said fixation tab are joined to each other without welding said attachment piece and fixation tab to each other.
9. The suture device of claim 1 , wherein said overlying attachment piece and said fixation tab are made from same materials.
10. The suture device of claim 1 , wherein said overlying attachment piece and said fixation tab are made from different materials.
11. The suture device of claim 1 , wherein the width of the tab opening is tapered such that the distal end of the tab opening has a larger width than the width of the tab opening at said proximal wall.
12. The suture device of claim 1 , wherein the thickness of the tab opening is tapered such that the distal end of the tab opening has a larger thickness than the thickness of the tab opening at said proximal wall.
13. A suture device comprising:
a. an elongated suture body having a proximal end and a distal end, wherein the elongated suture body includes a fixation tab at the distal end such that the elongated suture body terminates at the fixation tab; and
b. an overlying attachment piece comprising an opening sized to receive the elongated suture body, wherein the opening is configured to receive the fixation tab therein such that at least a portion of the distal end of the elongated suture body is disposed within the overlying attachment piece; the overlying attachment piece further comprising a distal end and a pair of longitudinal slits terminating at the distal end of the overlying attachment piece, such that when the fixation tab is received within the overlying attachment piece the distal end of the fixation tab extends distally from the overlying attachment piece and the fixation tab extends laterally through the pair of longitudinal slits.
14. The suture device of claim 13 , wherein the pair of longitudinal slits are in communication with the opening and are sized to receive an outer edge of the fixation tab.
15. The suture device of claim 13 , wherein the overlying attachment piece includes a pair of vertical walls disposed within the opening.
16. The suture device of claim 15 , wherein the pair of vertical walls are configured to abut the fixation tab such that the pair of vertical walls inhibit the fixation tab from extending through the overlying attachment piece.