Surgical suture passers and methods
View Patent ↗A surgical instrument for suturing soft tissue is disclosed. The surgical instrument is capable of probing tissue, and preferably provides tactile feedback concerning the condition of the tissue. The instrument can then be used to pass and retrieve a suture without the need for an additional suture retrieval tool.
1. A surgical device for passing a suture and dart assembly, the device comprising.
a body portion,
an extension portion projecting distally from the body portion and comprising a longitudinal axis,
a dart transport jaw and a dart capturing jaw, wherein both jaws are pivotable toward the longitudinal axis,
a jaw manipulator capable of moving the jaws simultaneously toward the longitudinal axis and comprising a pair of moveable levers extending from the body portion,
a firing member mounted on the body portion for movement relative to the body portion between prefired and fired positions;
the dart transport jaw and the dart capturing jaw each having a major tissue gripping surface, the jaws being operatively associated with the jaw manipulator for movement between a release position with the major tissue gripping surfaces of the jaws spaced apart to receive tissue, and a clamped position with the major tissue gripping surfaces of the jaws spaced closer together than in the release position and adapted to manipulate tissue therebetween, the jaws being sized and shaped to define a tissue receiving region that is located proximal relative to the major tissue gripping surfaces when the jaws are in the clamped position,
the dart transport jaw including a channel capable of being loaded with at least a portion of a suture and dart assembly,
a firing assembly operatively associated with the firing member for passing the suture and dart assembly from the dart transport jaw to the dart capturing jaw when the jaws are in the clamped position, and
the dart capturing jaw including a dart capturing member capable of associating the suture and dart assembly with the dart capturing jaw after the firing member is moved from the pre-fired to the fired position with the jaws in the clamped position,
wherein the firing assembly includes a dart cam receivable within a substantially internal channel in the dart transport jaw, and wherein the suture and dart assembly comprises a dart,
the dart cam having a distal surface adapted to engage a shoulder surface on the dart of the suture and dart assembly, and
a pusher operatively associated with the firing member to move the dart cam from a retracted position situated within the channel of the dart transport jaw to a projecting position with at least a portion of the dart cam projecting beyond the major tissue gripping surface of the dart transport jaw when the firing member moves from the prefired to the fired position.
2. A device according to claim 1 wherein the dart cam includes a beveled distal end.
3. A device according to claim 1 wherein the dart cam has a centerline that follows a path as the pusher moves the dart cam from the retracted to the projecting position,
the dart is substantially cone shaped with a tip and the shoulder surface,
and the dart cam includes a beveled distal end that is shaped to abut the shoulder surface of the dart to drive the tip of the dart along a path that is substantially colinear with the path of distal point on the centerline of the dart cam during movement from the retracted to the projecting position.
4. A device according to claim 1 wherein the dart cam includes a slot for receiving a portion of a suture of the suture and dart assembly that is substantially adjacent a dart of the suture and dart assembly.