Expandable needle suture apparatus and associated handle assembly with rotational suture manipulation system
A surgical suturing device ( 10 ) having an axis extending between a proximal end and a distal end is operable to move a suture ( 32 ) through body tissue ( 34 ). A handle assembly ( 110 ) is coupled to an elongated shaft ( 14 ) having a hollow configuration. An actuating rod ( 16 ) is disposed to extend between the handle assembly ( 110 ) and the shaft ( 14 ). A thumb actuation assembly is coupled to a proximal end of the actuating rod ( 16 ) for moving the rod both axially and rotationally. A needle assembly ( 2 ) at the distal end of the actuating rod ( 16 ) is movable with the actuating rod ( 16 ) between an extended state and a retracted state and at various angular orientations.
1. A method for placing suture across a body wall of a patient, comprising the steps of:
providing a suture device including a hollow shaft with a proximal end and a distal end, a longitudinal handle assembly connected to the proximal end of the hollow shaft, an actuating rod disposed in the hollow shaft, a needle assembly carried by the actuating rod between a deployed position and a retracted position, and a thumb actuator assembly operatively connected to a proximal end of the actuating rod, the thumb actuator assembly located on and extending from a side of the longitudinal handle assembly, near a distal end of the longitudinal handle assembly, and movable longitudinally on the side of the longitudinal handle assembly between a distal position and a proximal position and between a first lateral position and a second lateral position, and wherein the thumb actuator assembly comprises a thumb wheel that slides axially along a longitudinal axis of the longitudinal handle assembly and rotates angularly about the longitudinal axis;
providing the needle assembly with a needle having a sharp distal tip;
bifurcating the needle to form at least one pair of arms defining a suture slot, the arms being movable between a proximate position associated with a first slot size and a spaced position associated with a second slot size greater than the first slot size;
penetrating the body wall with the needle assembly in the retracted position and the arms in the proximate position;
advancing the needle assembly to the deployed position to move the arms to the spaced position associated with the second slot size; and
rotating the needle assembly with the thumb wheel between the first lateral position and the second lateral position to vary the orientation of the suture slot.
2. The method recited in claim 1 further comprising the step of:
providing a channel in one of the arms to provide for side-loading of the suture into the suture slot.
3. The method recited in claim 2 wherein the slot has a proximal end and a distal end and the forming step includes the step of providing the channel in proximity to the distal end of the slot.
4. The method recited in claim 2 wherein the slot has a proximal end and a distal end and the forming step includes the step of providing the channel in proximity to the proximal end of the slot.
5. The method recited in claim 1 wherein the step of providing the needle assembly further comprises the step of providing a rounding of at least the distal end of the suture slot.
6. The method recited in claim 1 wherein the providing step includes the step of providing at least one proximally-facing shoulder on the needle to define the retracted position where the shoulder contacts the hollow shaft.