CN-122028853-A - Suture cutting tool

Abstract

A suture cutting tool has a housing, a plunger assembly, and a blade. The housing has an inner bore and a body having an anvil assembly positioned at a distal end of the housing to define a slot. The anvil assembly has a top surface and a blade slot. The plunger assembly has a plunger rod slidably movable relative to the housing. The blade is coupled to the plunger rod and includes a cutting edge. The blade is movable with the plunger assembly between at least a first position with the cutting edge positioned within the slot and a second position with the cutting edge positioned within the blade slot of the anvil. The cutting edge is structurally configured to cut a suture traversing the blade slot by movement between a first position and a second position.

Inventors

• T. D. Schwartz
• J. Gannim

Assignees

• 缝合切片机有限公司

Dates

Publication Date

20260512

Application Date

20240613

Priority Date

20230613

Claims (20)

1. 1. A suture cutting tool, the suture cutting tool comprising: -a housing having a distal end, a proximal end, and an inner bore defined therethrough, the housing further comprising a body having an anvil assembly positioned at the distal end of the housing, the body and anvil assembly being coupled by a connecting bridge to define a slot, the anvil assembly having a top surface facing the inner bore and defining a blade slot between a first side and a second side of the top surface; -a plunger assembly having a plunger rod slidably movable within the interior bore of the housing, the plunger rod having a first end extending beyond the housing and a second end extending beyond the interior bore of the housing; -a blade coupled to the distal end of the plunger rod and comprising a cutting edge, the blade being movable with the plunger assembly between at least a first position with the cutting edge within the suture slot and a second position with the cutting edge within the blade slot of the anvil; -the cutting edge being structurally configured to cut a suture traversing the blade slot within the suture slot when moving between the first and second positions.
2. 2. The suture cutting tool according to claim 1, wherein the cutting edge is prevented from reaching a lower end of the bottom wall of the blade slot.
3. 3. The suture cutting tool according to claim 1, wherein the blade slot further comprises a first wall and a second wall opposite the first wall, the first wall and the second wall being spaced apart from one another and depending from the top surface, wherein the blade is prevented from abutting either of the first wall and the second wall.
4. 4. The suture cutting tool according to claim 1, wherein the blade defines a thickness and, upon insertion into the blade slot, the distance between the blade and the first wall and the distance between the blade and the second wall is less than or equal to the thickness of the blade.
5. 5. The suture cutting tool according to claim 4, wherein the blade has a thickness of 0.004 inches and the blade slot has a width of 0.010 inches, wherein the blade substantially bisects the blade slot in the middle.
6. 6. The suture cutting tool according to claim 1, further comprising a return spring having a first end engaged with the housing and a second end engaged with the plunger rod, the return spring forcing the blade away from the second position.
7. 7. The suture cutting tool according to claim 1, wherein in the first position the cutting edge is positioned within the interior bore of the housing.
8. 8. The suture cutting tool according to claim 1, further comprising: -at least one longitudinal slot defined in the inner bore of the housing terminating at the proximal end of the housing; -at least one outer surface protrusion on an outer surface of the plunger rod, the at least one outer surface protrusion being slidably movable within at least one longitudinal groove of the housing; -said at least one longitudinal groove captures said at least one outer surface protrusion so as to restrict relative rotation of said plunger rod with respect to said housing.
9. 9. The suture cutting tool according to claim 8, wherein the at least one exterior surface protrusion and the at least one longitudinal slot are configured to increasingly limit relative rotation of the plunger rod with respect to the housing as the blade is guided from the first position toward the second position.
10. 10. The suture cutting tool according to claim 8, wherein the at least one outer surface protrusion comprises four outer surface protrusions and the at least one longitudinal slot comprises four longitudinal slots spaced apart on the inner bore of the housing.
11. 11. The suture cutting tool according to claim 8, wherein the at least one outer surface protrusion has a lower end protrusion wall that engages with a distal stop that prevents further movement in the direction of the second end.
12. 12. The suture cutting tool according to claim 8, wherein the outer surface of the plunger rod further comprises a plurality of protrusions extending outwardly from the outer surface, the plurality of protrusions engaging the inner bore to improve alignment of the blade relative to the blade slot as the blade is directed toward the second position.
13. 13. The suture cutting tool according to claim 12, wherein, prior to the cutting blade entering the blade slot, at least one of the plurality of projections contacts the bore as the blade is directed toward the second position, and at least one of the plurality of projections is spaced apart from the bore as the blade is directed toward the first position.
14. 14. The suture cutting tool according to claim 1, wherein the plunger rod defines a longitudinal axis of travel within the bore, the top surface of the anvil assembly being substantially perpendicular to the longitudinal axis.
15. 15. The suture cutting tool according to claim 1, wherein the blade slot comprises a first sidewall and a second sidewall, the first sidewall and the second sidewall being parallel to each other and perpendicular to the top wall.
16. 16. The suture cutting tool according to claim 15, wherein the housing comprises two components coupled end-to-end, a first component being a body and a second component being a sleeve, the plunger rod extending through the body and the sleeve.
17. 17. The suture cutting tool according to claim 1, wherein the connecting bridge further comprises a facing wall, the blade slot intersecting the facing wall.
18. 18. The suture cutting tool according to claim 1, wherein the blade comprises a cutting edge that is substantially perpendicular to the longitudinal axis of the plunger rod.
19. 19. A method of using a suture cutting tool, the method comprising the steps of: -providing a suture cutting tool according to claim 1; -placing a suture into the suture slot and across the blade slot; -guiding the plunger rod from the first position to the second position, and -Cutting the suture as the blade passes over the top wall.
20. 20. The method of claim 19, wherein the suture is held outside the blade slot during the cutting step.

Description

Suture cutting tool Cross Reference to Related Applications The present application claims priority from U.S. provisional patent application No.63472595 entitled "suture cutting tool," filed on day 13, 6, 2023, the entire disclosure of which is incorporated herein by reference. Technical Field The present disclosure relates generally to medical devices and, more particularly, to a suture cutting tool configured to cut a suture for use in surgery or another medical procedure, typically in the case of an internal suture, but not limited thereto. Background Suturing is a medical technique that involves suturing tissue together, typically in a surgical or another medical procedure. One type of suturing is internal suturing, which is a medical technique that involves suturing together internal tissues or organs that have been cut or damaged during a surgical or another medical procedure. Such medical procedures are commonly used for various types of surgery, including, but not limited to, those involving the digestive, urinary and reproductive systems. While internal suturing can be effective in promoting healing and reducing the risk of complications, medical procedures are not without challenges. Typically, when such medical procedures are completed, the suture is cut using scissors or the like. One common problem associated with internal suturing medical procedures is the risk of tissue damage due to the scissors contacting or damaging tissue as they are manipulated or inadvertently cutting tissue as they are cut. In such cases, the injury may result in infection, bleeding, or even organ failure. In addition, improper operation of scissors or other instruments may result in tissue tears, hernias, and other complications, some of which may require further medical intervention. Disclosure of Invention In one aspect of the disclosure, the disclosure is directed to a suture cutting tool that includes a housing, a plunger assembly, and a blade. The housing has a distal end, a proximal end, and an internal bore defined therethrough. The housing further includes a body having an anvil assembly positioned at a distal end of the housing, the body and anvil assembly coupled by a connecting bridge to define a slot. The anvil assembly has a top surface facing the bore and defines a blade slot between a first side and a second side of the top surface. The plunger assembly has a plunger rod slidably movable within the interior bore of the housing, the plunger rod having a first end extending beyond the housing and a second end extending beyond the interior bore of the housing. A blade is coupled to the distal end of the plunger rod and includes a cutting edge that is movable with the plunger assembly between at least a first position with the cutting edge positioned within the slot and a second position with the cutting edge positioned within the blade slot of the anvil. The cutting edge is structurally configured to cut a suture traversing the blade slot within the suture slot when moving between the first position and the second position. In some constructions, the cutting edge is prevented from reaching the lower end of the bottom wall of the insert pocket. In some constructions, the blade slot further includes a first wall and a second wall opposite the first wall, the first wall and the second wall being spaced apart from each other and depending from the top surface, wherein the blade is prevented from abutting either of the first wall and the second wall. In some constructions, the blade defines a thickness, and when inserted into the blade slot, a distance between the blade and the first wall and a distance between the blade and the second wall is less than or equal to the thickness of the blade. In some constructions, the blade has a thickness of 0.004 inches and a width of 0.010 inches, wherein the blade substantially bisects the blade slot in the middle. In some constructions, the tool includes a return spring having a first end engaged with the housing and a second end engaged with the plunger rod. The return spring forces the blade away from the second position. In some constructions, in the first position, the cutting edge is positioned within the internal bore of the housing. In some constructions, the tool further includes at least one longitudinal slot defined in the internal bore of the housing terminating at the proximal end of the housing. In addition, at least one outer surface protrusion on an outer surface of the plunger rod, the at least one outer surface protrusion being slidably movable within the at least one longitudinal slot of the housing. The at least one longitudinal slot captures the at least one outer surface protrusion to constrain relative rotation of the plunger rod with respect to the housing. In some configurations, the at least one exterior surface protrusion and the at least one longitudinal slot are configured to increasingly limit relative rotation of the plunger rod with respect