Surgical tool having a cannula, a surgical kit, a method of fabrication, and a machine for fabricating such a tool

1. A surgical tool ( 1 ) for inserting surgical implants in a patient's body, the tool comprising:

a main body ( 2 ) extending along a longitudinal axis (X-X′) between firstly a working end ( 3 ) and secondly a proximal end ( 4 ), the main body ( 2 ) also presenting an outside surface ( 5 ) connecting the working end ( 3 ) to the proximal end ( 4 ); and

a guide cannula ( 14 ) arranged within the main body ( 2 ) and extending between a distal orifice ( 15 ) opening to the outside of said main body ( 2 ) at the working end ( 3 ), and a rear orifice ( 16 ) disposed intermediate said working end and said proximal end;

said surgical tool ( 1 ) being characterized in that said rear orifice ( 16 ) opens out to the outside surface ( 5 ) of said main body ( 2 ), and in that said main body ( 2 ) presents longitudinal splines ( 25 , 27 , 28 ) projecting from said main body ( 2 ) in respective planes extending radially relative to the longitudinal axis (X-X′).

2. A surgical tool ( 1 ) as defined in claim 1 in which said guide cannula ( 14 ) is formed by:

a main tubular channel ( 17 ) extending over a first portion of the guide cannula ( 14 ) from the distal orifice ( 15 ) along the longitudinal axis (X-X′); and

an open channel ( 18 ) arranged in the outside surface ( 5 ) extending from the rear orifice ( 16 ) so as to extend the main tubular channel ( 17 ).

3. A surgical tool ( 1 ) as defined in claim 2 in which said tool is designed to be made in a single molding operation, and for this purpose extends on either side of a join plane (Pj) carried by the longitudinal axis (X-X′) in such a manner that:

the main body ( 2 ) and the open channel ( 18 ) taper relative to said join plane (Pj); and

the main tubular channel ( 17 ) tapers along the longitudinal axis (X-X′).

4. A surgical tool ( 1 ) as defined in claim 2 in which the open channel ( 18 ) is formed by:

a groove bottom ( 20 ) extending the main tubular channel ( 17 ) along the longitudinal axis (X-X′) over at least a fraction of a length of the surgical tool ( 1 ); and

two channel walls ( 21 ) rising from the bottom to the outside surface ( 5 ).

5. A surgical tool ( 1 ) as defined in claim 4 in which the channel walls ( 21 ) extend from the main tubular channel ( 17 ):

over a splined portion ( 22 ) along which they are extended by two parallel longitudinal reinforcing fins ( 24 ) projecting from the outside surface ( 5 ) of the main body ( 2 ); and then

over a trough portion ( 23 ) along which the channel walls ( 21 ) open out from the outside surface ( 5 ) of the main body ( 2 ).

6. A surgical tool ( 1 ) as defined in claim 5 in which said tool includes a front longitudinal spline ( 25 ) projecting from the main body ( 2 ) in a plane radial to the longitudinal axis (X-X′) so as to extend and unite the two longitudinal reinforcing fins ( 24 ) towards the working end ( 3 ).

7. A surgical tool ( 1 ) as defined in claim 1 in which said tool includes a fitted working endpiece ( 7 ) secured to the main body ( 2 ) to form its working end ( 3 ), the fitted working endpiece ( 7 ) including an auxiliary tubular channel ( 19 ) arranged therein from a working orifice ( 32 ), so that the auxiliary tubular channel ( 19 ) extends the guide cannula ( 14 ) from the distal orifice ( 15 ) to the working orifice ( 32 ).

8. A surgical tool ( 1 ) as defined in claim 7 in which the main body ( 2 ) has a reception portion ( 8 ) for receiving the fitted working endpiece ( 7 ), via which the fitted working endpiece ( 7 ) is secured to said main body ( 2 ), the reception portion ( 8 ) being generally in the form of a body of revolution about the longitudinal axis (X-X′) and extending over a fraction of the main body ( 2 ) from its working end ( 3 ).

9. A surgical tool ( 1 ) as defined in claim 8 in which the surgical tool ( 1 ) is made entirely out of a first material, with the exception of the fitted working endpiece ( 7 ) which is made out of a second material that is distinct from the first material.

10. A surgical tool ( 1 ) as defined in claim 1 in which said tool includes a connector ( 9 ) for connecting said surgical tool ( 1 ) to a rotary appliance, said connector ( 9 ) being arranged in a vicinity of the proximal end ( 4 ).

11. A surgical tool ( 1 ) as defined in claim 1 in which said tool includes a receptor ( 13 ) for receiving a handle ( 12 ) enabling said surgical tool ( 1 ) to be releasably assembled with said handle ( 12 ) so as to co-operate therewith to form a surgical instrument having a removable handle.

12. A surgical tool ( 1 ) as defined in claim 11 in which the handle ( 12 ) includes a reception orifice ( 26 ) designed to receive the surgical tool ( 1 ) by means of the receptor ( 13 ), the receptor being designed to prevent said handle ( 12 ) from moving in rotation relative to said surgical tool ( 1 ) about the longitudinal axis (X-X′), while allowing said handle ( 12 ) to slide relative to said surgical tool ( 1 ) along the longitudinal axis (X-X′).

13. A surgical tool ( 1 )as defined in claim 12 in which the receptor ( 13 ) comprises at least one main longitudinal spline ( 27 ) projecting from the main body ( 2 ) in a plane extending radially relative to the longitudinal axis (X-X′), the main longitudinal spline ( 27 ) being designed to co-operate with a main longitudinal slot of the reception orifice ( 26 ) of the handle ( 12 ) to move in order to constrain said handle ( 12 ) in rotation about the longitudinal axis (X-X′) together with said surgical tool ( 1 ).

14. A surgical tool ( 1 )as defined in claim 13 in which the receptor ( 13 ) also includes two auxiliary longitudinal splines ( 28 ) arranged symmetrically relative to the plane in which the longitudinal slot extends, radial relative to the longitudinal axis (X-X′), each of the auxiliary longitudinal splines ( 28 ) being designed to co-operate with an auxiliary longitudinal slot of the reception opening of the handle ( 12 ) in order to contribute at least to constraining the handle ( 12 ) to move in rotation about the longitudinal axis (X-X′) together with said surgical tool ( 1 ).

15. A surgical tool ( 1 ) as defined in claim 11 in which said tool includes at least one stop lug ( 29 ) for stopping movement in translation along the longitudinal axis (X-X′) of the handle ( 12 ), the stop lug ( 29 ) being designed to form an end stop for movement in translation of the handle ( 12 ) towards the working end ( 3 ) of the surgical tool ( 1 ).

16. A surgical tool ( 1 ) as defined in claim 11 in which said tool includes a blocking element ( 30 ), arranged at the outside surface ( 5 ) of the main body ( 2 ), the handle ( 12 ) being provided with an-actuatable blocker ( 31 ) designed to move between:

firstly a blocking configuration in which the blocker ( 31 ) blocks sliding of the handle along the longitudinal axis of the surgical tool ( 1 ) by co-operating shapes with the blocking element ( 30 ); and

secondly a release configuration in which the blocker ( 31 ) allows the handle to slide along the longitudinal axis of the surgical tool ( 1 ).

17. A surgical tool ( 1 ) as defined in claim 11 in which said tool includes a removable endpiece of a surgical screwdriver or a removable endpiece for inserting surgical pins.

18. A surgical tool ( 1 ) according to claim 1 in which said guide cannula ( 14 ) is provided with a proximal orifice ( 33 ) opening out from the main body ( 2 ) at the proximal end ( 4 ).

19. A surgical tool as defined in claim 1 comprising a surgical kit having at least one surgical tool ( 1 ) and a removable handle ( 12 ).

20. A surgical tool ( 1 ) as defined in claim 1 being produced according to a method, the method being characterized in that it comprises a single molding step during which said surgical tool ( 1 ) is made in full.

21. A surgical tool ( 1 ) as defined in claim 1 being produced by a fabrication machine, the fabrication machine of the invention comprising a mold having a first mold cavity, a second mold cavity, and at least a first slide, designed together to form a closed space in which a material for forming the surgical tool is to be cast:

the first mold cavity and the second mold cavity being designed together to model the material so as to form the main body ( 2 ) and the rear orifice ( 16 ), at least in part; and

the first slide being designed to provide the working orifice ( 3 ) within the main body ( 2 ).