Anastomosis device

Anastomosis system for joining two stumps of a tubular organ, comprising:

• a coupling device with a body and a housing, a coupling assembly linked to the body, a plurality of suturing units within the coupling assembly and an actuator arrangement formed within the device;
• the coupling assembly that comprises
• a first and second axial coupling members defining a coupling axis, having two opposite, respective, first and second stump-coupling axial projections, each of the projections being configured for independent coupling with one of the stumps by pulling walls of the stump over external surface thereof to a suturing state in which the stump walls cover a stump-engaging portion thereof,
• two opposite sets of first and second open channels in said first and second stump-coupling members, respectively, arranged in an axially-symmetric manner about the coupling axis, each of the channels (i) extending between a rear channel end in stump-coupling member and a front channel end in the stump-engaging portion of the projection to define a channel axis, (ii) being defined between side walls and a bottom wall that has curved front wall portion and a curved rear wall portion, the curvatures of the two portions being offset and separated by a pivot point, and (iii) having a counterpart channel in the opposite set that extends along the same channel axis, and comprises
• first and second needle manipulation elements in the first and second stump-coupling members, respectively, each being axially displaceable between an outer position more proximal to said stump-coupling projection and inner position;
• each of the plurality of suturing units comprises
• a suturing thread and two curved suturing needles, each with a tipped front and a thread-coupled rear that is coupled to the thread,
• the suturing needles being each accommodated within one of the channels, with one of the suturing needles of each unit being accommodated in a channel of one of said stump-coupling members and the other suturing needle of the unit in the counterpart channel in the other of said stump-coupling members,
• when the needle manipulation element is in its outer position, the front portion of each needle rests against the front wall portion and the rear end of the needle extending out of the channel, and
• the rear end of the needle being coupled to the needle manipulation element such that upon the axial displacement of said element from the outer position to the inner position, the needle pivots about said pivot point to rest against the rear wall portion, thereby pivotally displacing the tipped front of the needle out of said channel to pierce through the stump walls when in said suturing state;
• the actuator arrangement
• being symmetric about a plane of symmetry substantially perpendicular to the coupling axis of the coupling assembly,
• having a first and second arms, pivotally fixed to the body about, respective, first and second pivot axes that are essentially parallel to the plane of symmetry, each configured for coupling at their distal portion to the respective, first and second needle manipulation elements, and, independently, moving each of the arms from an initial state to a tissue piercing state, causing a distal portion of the respective arm to move towards the other to axially displace the respective needle manipulation element from the outer to the inner position, and
• having first and second actuation elements, each being independently reciprocally displaceable generally in the proximal-distal direction, and, respectively, associated with the first and second arms, to cause, during such reciprocation, the arms to pivot between a rest and an actuating state inducing the, respective, needle manipulation elements to displace between the outer position and the inner position.