LAPAROSCOPIC SURGICAL INSTRUMENT

Abstract

A laparoscopic surgical instrument is provided with a manual gripping portion provided with three gripping members, one of them being fixed (non-movable) and the other two gripping members being movable and hinged such that each can perform an angular movement, facilitating the use of the tool during surgery.

Claims

1. A laparoscopic surgical instrument comprising: a manual gripping portion provided with two gripping members being movable and hinged such that each can perform an angular movement, configured to house a user's finger a work tool provided with two jaws being hinged with each other by means of a pivoting shaft, able to be handled by means of the gripping portion, an actuator mechanism capable of transmitting movement from the gripping portion to the work tool, wherein the actuator mechanism comprises two push rods, wherein the distal end of each of the push rods is hingedly coupled to a corresponding jaw and the proximal end is rotatably joined to a corresponding annular body capable of longitudinal movement, such that the push rods are capable of rotating, and wherein each gripping member is coupled to a respective annular body by means of connecting rods, wherein the gripping portion includes a third fixed gripping member configured to house a user's finger, being coupled to a support part wherein the two push rods are mounted, and located between the two hinged gripping members, the two gripping members being hinged to the third gripping member by means of a shaft, each of the connecting rods being coupled through are one of the ends thereof to an open portion present on the lateral wall of the annular bodies, through which the end of the connecting rod is slidable, such that they enable the annular body and consequently the push rod associated with the respective annular body to rotate, and wherein a guiding system is included to perform the annular movement of each of the jaws, the guiding system being provided with a groove in the shape of a slot present in each of the jaws, in which a projection protruding from each of the push rods is slidable.

2. The laparoscopic surgical instrument according to claim 1, wherein one of the movable gripping members is defined by a hook-shaped body.

3. The laparoscopic surgical instrument according to claim 1, wherein the fixed gripping member includes an extension with an arched contour that extends beyond the area provided for the placement of a user's finger.

4. (canceled)

5. The laparoscopic surgical instrument according to claim 1, wherein each of the jaws includes stop means to limit the angular movement thereof.

6. The laparoscopic surgical instrument according to claim 5, wherein the stop means are defined by a terminal area present in the jaw exhibiting two adjacent straight edges forming an obtuse angle with each other, and a straight area present in the facing jaw, provided to abut with one of the straight edges.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1A is a side elevation view of a preferred embodiment of a laparoscopic surgical instrument according to the present invention in a resting position;

[0022] FIG. 1B is an enlarged side view of a portion of FIG. 1A;

[0023] FIG. 2A is a partially cross-sectioned plan view of the surgical instrument shown in FIG. 1A in which some parts have been omitted for clarity reasons;

[0024] FIG. 2B is an enlarged detailed view of the area where the actuator mechanism is located;

[0025] FIG. 3 is a partial side elevation view of the laparoscopic surgical instrument in a second operational position;

[0026] FIG. 4 is a side elevation view of the laparoscopic surgical instrument shown in the previous figures that incorporates a cleaning system;

[0027] FIG. 5 is a detailed elevation view of the gripping portion of the instrument of the invention with the jaws in a closed position;

[0028] FIG. 6 is a detailed elevation view of the gripping portion with the jaws in an open position; and

[0029] FIG. 7 is a detailed perspective view of the gripping portion of the instrument with the jaws in an open position.

DESCRIPTION OF A PREFERRED EMBODIMENT

[0030] In view of the mentioned drawings and according to the numbering used, the figures show a preferred exemplary embodiment of the invention, which comprises the parts and members indicated and described in detail below.

[0031] Thus, as can be seen in the attached FIGS. 1A to 4, a laparoscopic surgical instrument, generally indicated with the reference (1), comprises a gripping portion provided with two movable gripping members (2,3) that are hinged to each other by means of a pivoting shaft (4), a work tool (30) provided with two jaws (31, 32) that are hinged to each other by means of a pivoting shaft (35) and an actuator mechanism capable of transmitting the movement from the gripping portion to the work tool (30), said actuator mechanism being described in greater detail below.

[0032] Furthermore, the gripping portion includes a third fixed gripping member (5) configured to house a user's finger, being coupled to a support part (8) wherein the two push rods (6, 7) which are detailed below are mounted, and located between the two hinged gripping members, the two gripping members being hinged to the third gripping member by means of a shaft.

[0033] One of the movable gripping members (3) and the fixed gripping member (5) exhibit an elongated shape with a rod section that ends with a section by way of a thimble, which have a very similar shape to conventional scissors thimbles, while the remaining movable gripping member (2) is defined by a hook-shaped body, such that the upper portion thereof is open (according to the orientation represented in the figures).

[0034] The fixed gripping member (5) includes an extension with an arched contour (50) that extends beyond the area provided for the placement of a user's finger.

[0035] Now referring particularly to the actuator mechanism capable of transmitting movement from the gripping portion to the work tool (30), wherein the actuator mechanism comprises two of the aforementioned push rods (6, 7), wherein the distal end of each of the push rods is hingedly coupled to a corresponding jaw and the proximal end is rotatably joined to a corresponding annular body capable of longitudinal movement, such that the push rods (6, 7) are capable of rotating, and wherein each gripping member is coupled to a respective annular body by means of connecting rods (11, 12).

[0036] These two annular bodies (9, 10) are movably arranged in a forward and backward axial movement (according to the orientation of FIGS. 1A to 4), wherein each gripping member (2, 3) is coupled to the two annular bodies (9, 10) by means of the set of two connecting rods (11, 12). Each of the connecting rods (11, 12) is coupled through one of the ends thereof to an open portion present in the lateral wall of the annular bodies (9, 10), such that they enable the annular body and consequently the push rod associated with the respective annular body to rotate. The open portion by way of a window through which the end of the connecting rod (11) can slide has been indicated with the numerical reference (90) in FIG. 1B.

[0037] A rotating wheel (20) that can be manually actuated enables the push rods (5, 6) to be rotated, the rotating wheel (20) being located in front of the gripping members (2, 3, 5) when the instrument (1) is in a position of use.

[0038] The actuator mechanism may be protected by a casing (not shown for clarity purposes) made of any suitable material, such as a plastic material.

[0039] Additionally, a guiding system is provided to perform the angular movement of each of the jaws (31, 32), the guiding system being provided with a groove (33) that is open at one of the ends thereof in the form of a slot present in each of the jaws, in which a projection (34) protruding from the other push rod is slidable, as can be seen more clearly in FIGS. 5 to 7.

[0040] Advantageously, each of the jaws (31, 32) includes stop means to limit the angular movement thereof.

[0041] These stop means are defined by a terminal area present in the jaw exhibiting two adjacent straight edges (36, 37) forming an obtuse angle with each other, and a straight area present on the facing jaw, intended to abut with one of the straight edges.

[0042] It is worth mentioning that the instrument includes a tubular cover located around and along a large portion of the two push rods (6, 7).

[0043] At the rear portion of the surgical instrument (1) a connection socket may be arranged, for example of the bipolar type, intended to be connected to a source of electrical current supply, such that electrical voltage can be transmitted if required.

[0044] Finally, as shown in FIG. 4, to clean or sterilise the work area (30) as well as the two push rods (6, 7), which is usually performed in any type of surgical instrument, a cleaning system can be used comprising an internally hollow tubular member (14) that exhibits an open end with a sealing gasket (15) that adapts to the outer walls of the push rods (6, 7) while the opposite end exhibits an inlet socket (16) provided for coupling to a fluid supply equipment (not shown).

[0045] The details, shapes, dimensions and other accessory members used in the manufacture of the instrument of the invention may be conveniently replaced by others that do not depart from the scope defined by the claims included below.