Device for microanatomosis of blood vessels

• US 5,702,048 A
• Filed: 02/03/1995
• Issued: 12/30/1997
• Est. Priority Date: 03/18/1993
• Status: Expired due to Fees

• Current Assignee: Jacques Baudet
• Original Assignee: Jacques Baudet
• Inventors: Eberlin, Rene
• Primary Examiner(s): Hall, III, Joseph J.
• Assistant Examiner(s): STELACONE, JAY
• Application Number:
  US08/343,424
• Time in Patent Office: 1,061 Days
• Field of Search: 227/19, 227/175.1, 227/176.1, 227/177.1, 227/901, 606/142, 606/143, 606/219, 606/220
• US Class Current: 227/177.1
• CPC Class Codes: A61B 17/064 Surgical staples, i.e. penetrating the tissue
• CPC Class Codes: A61B 17/0682 for applying U-shaped staples or clamps, e.g. without a forming anvil
• CPC Class Codes: A61B 17/11 for performing anastomosis; Buttons for anastomosis
• CPC Class Codes: A61B 17/1152 applying the staples on the outside of the lumen
• CPC Class Codes: A61B 2017/0641 having at least three legs as part of one single body

Abstract

A device for microanastomosis of blood vessels has a housing (1) provided with a gripper (3) for grasping and crimping staples (4, 5), housing (1) enclosing a mechanism for crimping staples (4, 5) by actuating the gripper (3). This mechanism has a control member (16) which is accessible from outside the housing (1), a staple magazine (33) and a mechanism for transferring a staple (4, 5) from the magazine to a position between the jaws of the gripper (3) which is likewise controlled by a member (9) accessible from outside the housing (1).

Claims

1. A device for microanastomosis of blood vessels comprising:

a housing including a sleeve (1) having two oppositely disposed open ends;

a drive plate (13) slidable within said sleeve (1) and supporting an axle (50);

a pair of retractable, movable arms (3) supported and articulated on said axle (50) and each said arm having one end extending outside of said sleeve (1) through one of said two oppositely disposed open ends;

a rod (14) operatively coupled with said plate (13), and a gripper coupled with one end of said rod (14), each of said movable arms (3) having, at a front end thereof, a socket (42) for grasping and holding a staple (4) between said movable arms in each said socket, one end of said rod being positioned at a rear portion of said housing opposite to said one of said oppositely disposed ends for movement of said plate (13), and extending outside of said sleeve (1) through the other of said oppositely disposed open ends opposite to said one open end and axially aligned therewith;

a removable magazine (32) receivable within said sleeve (1) and supported on said plate (13) for storing staples prior to their being grasped by said sockets (42);

means for effecting a grasping of said staple (4) including means for moving said rod (14) in a first direction out of said sleeve (1) through said other of said oppositely disposed open ends, and moving each said socket (42) to a position facing the staple (4) in said removable magazine (32) and movement of said rod (14) includes means for displacement of each of said arms (3) for movement of said arms (3) apart from each other to move each said socket (42) into position to face the staple (4);

said means for moving said rod (14) including means for displacement of said rod (14) in a second direction opposite to said first direction for movement of said rod (14) into said sleeve (1) towards said one open end to move each said socket (42) by movement of the arms (3) into a work position for crimping said staple (4) onto a blood vessel;

means including a finger operated lever (16) external of said sleeve (1) for moving said arms towards each other for effecting a preset movement of said arms (3) together by moving said arms towards each other to effect a crimping of the staple responsive to ends of the arms (3) being moved together towards each other;

a displaceable sliding member (17) internal of said sleeve (1) acting on an inner articulated lever (18), an inner cam member (47) supported on said displaceable sliding member (17), said inner articulated lever (18) being rotatable and operatively associated with said displaceable sliding member (17) for the displacement of said sliding member (17), said inner cam member (47) having a pair of outer cam faces (46), a pair of outer cam members (147) each having an inner cam face (48) cooperating with one of said outer cam faces (46) each said arm (3) having pivots (45) integral therewith and fixed in position between one of said outer cam faces (46) provided on said inner cam member (47), and one of said inner cam faces (48) and one of said outer cam members (147) having shaped lateral faces (48) thereon;

said inner cam member (47) having inclined planes (47a) for producing a relative movement (49) relative to each said pivot (45) of each said arm (3) for causing said pivots (45) to move apart initially during an initial phase of displacement and each said front end of each of said arms (3) being provided with said socket (42) to move together for crimping of the staple, and after the staple has been crimped, said arms (3) move apart for release of the staple (4) from each said socket (42) and allow each said socket (42) to be withdrawn and to accept a new staple.

2. The device for microanastomosis of blood vessels according to claim 1, comprising:

means including said inner cam member (47) slidable on a slidable member (17) for presetting the degree of bending or crimping, and said inner cam member (47) being slidable on a cylinder (52);

a button (55) forming a continuation of said cylinder (52), and being provided laterally with a helical groove (53) for receiving an end of an adjustable safety screw (56) integral with said sleeve (1), said inner cam member (47) being provided with inclined faces or planes (59); and

means for rotating said button (55), including means for adjusting or loosening said safety screw (56) and positioning said inclined faces (59) of said inner cam member (47) relative to said pivots (45) for displacing from each other said front ends of the arms (3) having said sockets (42) holding the staple (4) for releasing the staple from the sockets (42).

3. The device for microanastomosis of blood vessels according to claim 2, including:

means in said sleeve (1) responsive to the retraction of said arms for holding a removable staple magazine (32) in a front portion (31a) of a rocker arm (31) integral with an articulated lever (34) having a front end and a rear end, said front end being closer to a front end of said housing than said rear end so that said sockets (42) grasp a staple (4) after said arms (3) have been moved apart, said lever (34) including a cam (69) and said rocker arm (31) including a leaf spring (73) responsive to said lever (34);

a piece (36) supported on said plate (13) having a rear inclined surface (68) and a front cam (35);

means for swivelling said rocker arm (31) and said lever (34) including drawing said plate (13) back together with said piece (36) so that said rear inclined surface (68) pushes said cam (69) downwardly causing the rear end of said lever (34) to rise; and

means responsive to positioning of said cam (69) contacting said front cam (35) for controlling said leaf spring (73) holding a stack (33) of staples in position.

4. The device for microanastomosis of blood vessels according to claim 1, wherein each end of legs (5) of the staple (4) has a pair of claws (6).

5. The device as claimed in claim 1, including a bayonet locking system comprising:

a rotatable knob (9) for drawing said arms (3) into said sleeve (1) in a first direction and pushing said arms (3) in a second direction opposite to said first direction for securement of a staple between said arms; and

and pins (12) engageable in grooves (60), said knob (9) being rotatable in a first direction for unlocking said rod for withdrawal of said arms and being rotatable in the opposite direction after a staple is grasped between said arms for locking said knob.

6. The device as claimed in claim 1, including a leaf spring (73) cooperating with a washer (74) for lifting an entire stack of staples, and a pivot (67) for receiving a staple to be grasped by said sockets (42).

7. The device as claimed in claim 6, wherein said washer (74) is provided with a groove for receiving an annular spring (77) for holding said washer (74) in the position pushed by said leaf spring (73), and said spring (77) locks said washer (74) on a section (76) to prevent loss of said washer inside said gripper.

8. The device as claimed in claim 6, wherein said pivot (67) is provided with undercuts (67a) about which said arms (3) close.

9. The device as claimed in claim 1, wherein said magazine is provided with an internal thread 91, and including a spindle having an external thread receivable within and cooperating with said internal thread for holding the magazine for insertion into said gripper.

10. The device as claimed in claim 9, including safety means comprising pins (97) abutting against a clip (83) for causing said clip (83) to slide along said magazine (32) to release a top of a stack of staples, and tab (84) covering the top of the stack of staples to prevent any loss of staples remaining on a profile (76).

11. The device as claimed in claim 1, including means for crimping all staples uniformly, comprising said inner cam member (47) having inclined planes and means including the pivots (45) to alter the relative position between said sliding member (17) and said inner cam member (47).