Narrow profile surgical ligation clip

Patent metadata

Field	Value
Publication number	US-10136898-B2
Application number	US-201213616120-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Mar 9, 2010
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A narrow profile surgical ligation clip has two legs with clamping surfaces joined by a hinge near the proximal ends, allowing the clip to reversibly open and close. A locking mechanism is proximal to the hinge to bias or lock the clip closed, including first and second jaw structures spaced on opposite sides of a longitudinal axis of the clip thereby defining a locking space therebetween. In one embodiment, a wedge or buttress body moves by application of an external force applied to a proximal end of the clip towards the hinge to move into the locking space such that one or more outer surfaces or projections of portions of the body fit into or abut against complementary surfaces or other parts of the locking mechanism or clip assembly to bias or lock the clip in a closed position and provide additional closing force to the inner clamping surfaces.

First claim

What is claimed is:

1. A surgical ligation clip, defining a longitudinal axis and comprising:
first and second legs each extending along the longitudinal axis and having proximal and distal end portions with respect to said longitudinal axis,
a clip hinge joining the first and second legs at a point on their respective proximal end portions, the first and second legs each having inner clamping surfaces between the clip hinge and the distal end portions of said first and second legs, the clamping surfaces being substantially apposed when the clip is in a fully closed position,
a first jaw structure on the first leg extending proximal to the clip hinge, the first jaw structure having a first curved inner surface extending proximally from the clip hinge and facing the longitudinal axis and being substantially concave viewed from said axis,
a second jaw structure on the second leg extending proximal to the clip hinge, the second jaw structure having a second curved inner surface extending proximally from the clip hinge and facing the longitudinal axis and being substantially concave viewed from said axis, and
a buttress body extending from and connected to both the first jaw structure and the second jaw structure by a first living hinge and second living hinge, respectively extending from said first jaw structure and second jaw structure, the buttress body having an outer surface,
the first and second jaw structures being spaced from the longitudinal axis on opposite sides thereof and defining a locking space therebetween, the buttress body being moveable into the locking space such that at least first and second curved planar segment abutment portions of the outer surface of the buttress body each abuts against the substantially concave curved inner surfaces of the first and second jaw structures to bias the clip in a closed position,
wherein the buttress body forms a substantially cylindrical or generalized cylindrical body spanning laterally on a proximal end of the clip, and the locking space is a socket space and a volume subtended by the buttress body can occupy substantially all of said socket space, and
wherein when said buttress body is disposed in said locking space, abutment of the buttress body against the respective substantially concave curved inner surface of each of the first jaw structure and second jaw structure creates moments acting about the clip hinge directly on the first and second jaw structures, which moments directly act on the first and second legs to urge said legs closed and supply a clamping force between said legs.

2. The surgical clip of claim 1 , wherein the first and second curved planar segment abutment portions of the outer surface of the buttress body each form a convex outer surface when facing the longitudinal axis and which are complementary to the substantially concave curved inner surfaces of the first and second jaw structures.

3. The surgical clip of claim 2 , wherein the convex first and second curved planar segment abutment portions of the outer surface of the buttress body are symmetrical about the longitudinal axis and the substantially concave curved inner surfaces of the first and second jaw structures are symmetric about the longitudinal axis.

4. The surgical clip of claim 3 , wherein each of the curved inner surfaces of the first and second jaw structures forms a lip at a proximal end of each jaw structure extending transversely inwardly towards the longitudinal axis to grip against the proximal ends of each of the first and second curved planar segment abutment portions of the outer surface of the buttress body when said body is moved in the locking space.

5. The surgical clip of claim 3 , wherein a vector from a centerpoint lateral axis of the buttress body through a midpoint lateral span of either of the convex first and second curved planar segment abutment portions of the outer surface of the buttress body forms an angle of about 70 to 75 degrees from the longitudinal axis.

6. The surgical clip of claim 1 , wherein a transverse cross-section of the buttress body is substantially hexagonal having at least a plurality of curved side segments.

7. The clip of claim 1 , wherein the buttress body defines at least one recess extending laterally inwards into a lateral side of said buttress body.

8. The surgical clip of claim 1 , wherein each of the inner clamping surfaces define a plurality of teeth and grooves, the teeth and grooves on the first leg being aligned complementary to grooves and teeth, respectively, of the second leg.

9. The surgical clip of claim 1 , wherein each of the inner clamping surfaces further defines a concave radius of curvature when facing transversely away from the longitudinal axis towards said inner clamping surface.

10. The surgical clip of claim 1 , further comprising flanges extending longitudinally across respective outer surfaces of each of the first and second legs which are on opposite sides to the inner clamping surfaces of each respective leg, the flange of the first leg extending from the first jaw structure to the distal end portion of the first leg, the flange of the second leg extending from the second jaw structure to the distal end portion of the second leg.

11. The surgical clip of claim 10 , wherein each of the flanges defines a transverse protrusion extending transversely outwards away from the longitudinal axis proximate the distal end portions of the legs.

Assignees

• Schmidt Philip
• Monahan Dan
• Labarbera Brad
• Whiting Paul
• Morris Steven
• Castro Salvatore
• Ramsey Michael
• Willett Lynn
• Teleflex Medical Inc

Inventors

• Schmidt Philip
• Monahan Dan
• Labarbera Brad
• Whiting Paul
• Morris Steven
• Castro Salvatore
• Ramsey Michael
• Willett Lynn

Classifications

• A61B17/0643

  with separate closing member, e.g. for interlocking with staple · CPC title

• A61B17/1227

  Spring clips · CPC title

• A61B17/122 Primary

  Clamps or clips, e.g. for the umbilical cord {(for the vas deferens A61F6/206)} · CPC title