CN115670592A

CN115670592A - Surgical scissors

Info

Publication number: CN115670592A
Application number: CN202111524560.3A
Authority: CN
Inventors: 李益民; 刘光; 赵志刚; 鄢家杰
Original assignee: Hunan Handlike Minimally Invasive Surgery Co ltd
Current assignee: Hunan Handlike Minimally Invasive Surgery Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2023-02-03

Abstract

The invention discloses a pair of surgical scissors, which comprises a handle part, a clamping rod part, a locking cap and a shifting wheel, wherein a central sleeve extending towards the proximal direction is arranged in the center of the shifting wheel, a central through hole of the central sleeve penetrates through the shifting wheel, and an external thread is arranged at the proximal end of the central sleeve; the locking cap is provided with a through hole; the fixed handle is provided with a through hole of the fixed handle, the central sleeve is sleeved in the through hole of the fixed handle, and the near end of the central sleeve is in threaded connection with the screw cap of the thumb wheel; the central sleeve is sleeved on the action rod, the far end of the action rod is detachably and rotatably connected with the near end of the inner rod, and the movable handle is used for driving the action rod to move along the axis of the central sleeve; the inner of outer tube is connected with the fixing base, and after locking cap and thumb wheel threaded connection, the fixing base is fixed a position between locking cap and thumb wheel, and the fixing base is run through to the inner pole. The handle part and the forceps rod part of the surgical scissors are detachably connected, so that the forceps rod part can be quickly installed and separated, and the function of rotating the forceps rod part relative to the handle part is maintained.

Description

Surgical scissors

Technical Field

The invention relates to a pair of surgical scissors, belongs to the technical field of medical instruments, and particularly relates to a pair of detachable laparoscopic surgical scissors.

Background

The laparoscopic surgical scissors generally comprise a handle part and a clamp rod part, and an operator can open and close a cutting head at the far end of the clamp rod part through opening and closing control of the handle part so as to cut tissues. Laparoscopic surgery has many advantages over traditional surgery, firstly, there is little trauma and little scar after surgery; secondly, the operation is a single-knife straight-in entry, the damage to surrounding tissues is reduced to the minimum, and the chance of adhesion after the operation is reduced; finally, the pain of the wound of the patient after the operation is obviously reduced, and the hospitalization days are reduced. Most of existing laparoscopic surgery scissors are not detachable, the problem that the laparoscopic surgery scissors cannot be thoroughly cleaned and disinfected in the disinfection process is solved after the laparoscopic surgery scissors are repeatedly used after disinfection, cross infection is easily caused when the laparoscopic surgery scissors are reused, and great risks are brought to the surgery. Therefore, most of the existing laparoscopic surgical scissors are disposable, which is not favorable for reducing the cost and saving resources. Such as a laparoscopic surgical medical instrument disclosed in patent document 1 (publication No. CN110477999 a) and patent document 2 (publication No. CN107928724 a).

Disclosure of Invention

In order to realize the quick installation and the disassembly of a clamp rod part and a handle part of a laparoscopic surgical scissors, the invention provides the surgical scissors, and the specific technical scheme is as follows.

The surgical scissors comprise a handle part and a forceps rod part, wherein the handle part comprises a fixed handle and a movable handle, the forceps rod part comprises an outer sleeve and an inner rod sleeved in the outer sleeve, and the far end of the forceps rod part is provided with a scissors part; the movable handle can move relative to the fixed handle so as to realize the opening and closing action of the scissors part; it is characterized in that the surgical scissors also comprise a locking cap and a poking wheel;

the far end of the thumb wheel is provided with an external thread, the center of the thumb wheel is provided with a central sleeve extending towards the direction of the near end, a central through hole of the central sleeve penetrates through the thumb wheel, and the near end of the central sleeve is provided with an external thread;

the locking cap is provided with a through hole, the diameter of the far end of the through hole is smaller than that of the near end of the through hole, and the near end of the through hole is an internal thread hole;

the fixed handle is provided with a through hole of the fixed handle, the central sleeve is sleeved in the through hole of the fixed handle, the near end of the central sleeve is in threaded connection with a thumb wheel nut, and the outer diameters of the thumb wheel nut and the thumb wheel are both larger than the diameter of the through hole of the fixed handle;

the central sleeve is sleeved on an action rod, the far end of the action rod is detachably and rotatably connected with the near end of the inner rod, and the action handle is used for driving the action rod to move along the axis of the central sleeve;

the inner of outer tube is connected with the fixing base, the external diameter of fixing base is greater than the distal end diameter of through-hole, is less than the near-end diameter of through-hole, works as locking cap with thumb wheel threaded connection back, the fixing base is positioned locking cap with between the thumb wheel, the inner lever runs through the fixing base.

Furthermore, after the near end of the central sleeve is in threaded connection with a thumb wheel nut, the thumb wheel can rotate relative to the fixed handle, and a plurality of bulges are circumferentially arranged on the outer surface of the thumb wheel at intervals. By designing the length of the central sleeve and the length of the external thread at the near end of the central sleeve, the thumb wheel can not be fastened on the fixed handle; the bulge of the thumb wheel is beneficial for an operator to rotate the thumb wheel so as to change the opening orientation of the scissors portion.

Furthermore, the near end of the action rod is hinged with the far end of the connecting piece, the near end of the connecting piece is hinged with the movable handle, and the movable handle is also hinged with the movable handle. When an operator presses the movable handle, the movable handle can pull the connecting sheet, so that the movable handle and the inner rod can realize the closing action of the scissors, the reset springs can be arranged at certain positions, and after the movable handle is loosened by the operator, the movable handle automatically resets, and the scissors are automatically opened.

Furthermore, the scissors portion includes a first scissors blade and a second scissors blade, the first scissors blade and the second scissors blade are hinged to the outer sleeve through a first scissors pin, the first scissors blade and the second scissors blade both have sliding grooves, the sliding groove of the first scissors blade and the sliding groove of the second scissors blade form a certain angle, the far end of the inner rod has a second scissors pin, and the second scissors pin simultaneously penetrates through the sliding grooves of the first scissors blade and the second scissors blade. When the inner rod moves axially relative to the outer sleeve, the first shear blade and the second shear blade move relatively to realize the opening and closing of the shear part, and the tissue is sheared when the shear part is closed. The inner rod and the outer sleeve are relatively fixed in the circumferential direction, and when the shifting wheel is rotated, the shifting wheel can drive the inner rod and the outer sleeve to synchronously rotate, so that the orientation of the scissors portion is adjusted, and the operation is convenient to carry out.

Further, the inner rod has a neck portion at a proximal end thereof, a ball portion connected to the neck portion at a proximal end thereof, and a diameter of the neck portion is smaller than a diameter of the ball portion; the distal end of the actuating rod is provided with an end slit for accommodating the neck part and a cylindrical groove for accommodating the ball part, the extending direction of the cylindrical groove is perpendicular to the axis of the actuating rod, and the end slit and the cylindrical groove both extend to the outer surface of the actuating rod. Due to the arrangement, the near end of the inner rod and the far end of the action rod can be detachably connected through the movement in the direction perpendicular to the axis of the action rod, the back-and-forth movement (axial movement) of the action rod after connection can be transmitted to the inner rod to enable the inner rod to move back and forth, and the inner rod can rotate around the axial direction of the inner rod relative to the action rod; and the disassembly is also very convenient, thereby realizing the detachable rotary connection.

Further, the inner rod has a neck portion at a proximal end thereof, a ball portion connected to the neck portion at a proximal end thereof, and a diameter of the neck portion is smaller than a diameter of the ball portion; the far end of the action rod is provided with a claw part for accommodating the ball part, the claw part comprises more than three claws arranged at intervals in the circumferential direction, the inner surfaces of the claws are concave surfaces, and the inner diameter of the far end of the claw part is larger than the diameter of the neck part and smaller than the diameter of the ball part. In such an arrangement, the near end of the inner rod and the far end of the action rod can be detachably connected through clamping movement, the forward and backward movement (axial movement) of the action rod after connection can be transmitted to the inner rod to enable the inner rod to move forward and backward, and the inner rod can rotate around the axial direction of the inner rod relative to the action rod; and the disassembly is also very convenient, thereby realizing the detachable rotary connection.

Furthermore, the surgical scissors further comprise an electrocoagulation component arranged on the fixed handle, a contact of the electrocoagulation component is in contact with the action rod, and the scissors portion, the inner rod and the action rod are all made of metal materials. The electrocoagulation assembly may utilize high frequency current to coagulate small blood vessels for hemostasis.

Furthermore, the outer sleeve is a metal pipe, and the outer surface of the outer sleeve is also sleeved with an insulating sleeve. The outer sleeve adopts the metal tube, so that the structural strength can be improved, and the stability and the reliability of the surgical scissors are ensured.

Compared with the prior art, the handle part and the forceps rod part of the surgical scissors are detachably connected, so that the rapid installation and separation of the forceps rod part can be realized, and the function of the rotation of the forceps rod part relative to the handle part is maintained; the forceps rod part is a disposable part, and the handle part is a part which can be used repeatedly, so that the cost of the surgical scissors is reduced.

Drawings

FIG. 1 is an exploded schematic view of the surgical shears of the present invention;

FIG. 2 is a perspective view of a pair of surgical shears of the present invention;

FIG. 3 is a front view of the surgical shears of the present invention;

FIG. 4 is a cross-sectional view of a pair of surgical shears of the present invention;

FIG. 5 is an enlarged view of area A of FIG. 4;

FIG. 6 is an enlarged view of area B of FIG. 4;

FIG. 7 is a schematic proximal end view of the inner rod;

fig. 8 is a schematic view of the action lever.

In the figure: the electric coagulation device comprises a fixed handle 1, a movable handle 2, a shifting wheel 3, a locking cap 4, a clamp rod part 5, an electric coagulation component 6, a scissor part 7, a threaded nail 8, a first scissor pin shaft 9, a first scissor piece 10, a second scissor piece 11, an insulating sleeve 12, an outer sleeve 13, an inner rod 14, a neck part 14.1, a second scissor pin shaft 15, a shifting wheel screw cap 16, a connecting piece 17, a first pin 18, a second pin 19, an action rod 20, an end slit 20.1, a cylindrical groove 21, a ball part 22, a fixed seat 23, a bulge 24, a central sleeve 25, a contact 26 and a sliding groove 27.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

As shown in fig. 1 to 8, the surgical scissors of the present invention comprise a handle portion, a forceps lever portion 5, a locking cap and a thumb wheel;

the handle portion includes fixed handle 1 and movable handle 2, including fixed handle 1 and movable handle 2, and fixed handle 1 and movable handle 2 pass through the screw 8 articulated connection, and movable handle 2 can rotate around the screw 8, and the near-end of connecting piece 17 is connected with movable handle 2 through first pin 18 is articulated, and connecting piece 17 can rotate around first pin 18, and the near-end of action bars 20 passes through second pin 19 with the distal end of connecting piece 17 and is connected in an articulated manner.

As shown in fig. 1 and 6, the forceps rod portion 5 includes an outer sleeve 13 and an inner rod 14 sleeved in the outer sleeve 13, and the distal end of the forceps rod portion 5 is provided with the scissors portion 7; the scissors portion 7 comprises a first scissors blade 10 and a second scissors blade 11, the first scissors blade 10 and the second scissors blade 11 are hinged to the outer sleeve 13 through a first scissors pin 9, the first scissors blade 10 and the second scissors blade 11 both have sliding grooves 27, the sliding grooves 27 of the first scissors blade 10 and the sliding grooves 27 of the second scissors blade 11 form a certain angle, the far end of the inner rod 14 is provided with a second scissors pin 15, and the second scissors pin 15 penetrates through the sliding grooves 27 of the first scissors blade 10 and the second scissors blade 11. When the inner rod 14 moves axially relative to the outer sleeve 13, the first and

second blades

10 and 11 move relative to each other to open and close the scissor unit 7, and when closed, the tissue is cut. The outer sleeve 13 is preferably a metal pipe, and the outer surface of the outer sleeve 13 is also sleeved with an insulating sleeve 12.

As shown in fig. 1, the distal end of the thumb wheel 3 has an external thread, the center of the thumb wheel 3 has a center sleeve 25 extending in the proximal direction, a center through hole (not shown) of the center sleeve 25 penetrates the thumb wheel 3, and the proximal end of the center sleeve 25 has an external thread; the fixed handle 2 is provided with a through fixed handle through hole (not shown), the central sleeve 25 is sleeved in the through hole of the fixed handle, the near end of the central sleeve 25 is in threaded connection with the thumb wheel nut 16, and the outer diameters of the thumb wheel nut 16 and the thumb wheel 3 are both larger than the diameter of the through hole of the fixed handle; after the near end of the central sleeve 25 is in threaded connection with the thumb wheel nut 16, the thumb wheel 3 is axially positioned on the fixed handle 2 through the thumb wheel nut 16, the thumb wheel 3 can rotate relative to the fixed handle 2, and a plurality of protrusions 24 are circumferentially arranged on the outer surface of the thumb wheel 3 at intervals; by designing the length of the central sleeve 25 and the length of the external thread at the proximal end of the central sleeve 25, it is achieved that the dial wheel 3 is not fastened to the fixed handle 2 (i.e. there is a certain clearance between the dial wheel 3 and the fixed handle 2 in the axial direction). The central sleeve 25 is sleeved on the action rod 20, the distal end of the action rod 20 is detachably and rotatably connected with the proximal end of the inner rod 14, and the movable handle 2 drives the action rod 20 to move along the axis of the central sleeve through the connecting piece 17. The detachable rotation connection here means that the inner rod 14 can rotate around its own axis relative to the action rod 20, and the inner rod 14 and the action rod 20 are detachably connected in the axial direction.

The locking cap 4 is provided with a through hole (not shown) which is penetrated through, the diameter of the far end of the through hole is smaller than that of the near end of the through hole, and the near end of the through hole is an internal threaded hole; the inner of outer tube 13 is connected with fixing base 23, and the external diameter of fixing base 23 is greater than the distal end diameter of the through-hole of locking cap 4, is less than the near-end diameter of the through-hole of locking cap 4, and after locking cap 4 and thumb wheel 3 threaded connection, fixing base 23 is positioned between locking cap 4 and thumb wheel 3, and fixing base 23 (outer tube 13) can rotate with thumb wheel 3 together, and interior pole 14 runs through fixing base 23.

As shown in fig. 5 and 7-8, in order to realize the detachable and rotatable connection of the action rod 20 and the inner rod 14, the inner rod 14 is provided with a neck part 14.1 at the proximal end, a ball part 22 is connected to the proximal end of the neck part 14.1, and the diameter of the neck part 14.1 is smaller than that of the ball part 22; the distal end of the actuating rod 20 has an end slit 20.1 for receiving the neck 14.1 and a cylindrical recess 21 for receiving the ball 22, the cylindrical recess 21 extending in a direction perpendicular to the axis of the actuating rod 20, the end slit 20.1 and the cylindrical recess 22 each extending to the outer surface of the actuating rod 20. The proximal end of the inner rod 14 and the distal end of the actuating rod 20 can be detachably connected through movement in a direction perpendicular to the axis of the actuating rod 20, and the forward and backward movement (axial movement) of the actuating rod 20 after connection can be transmitted to the inner rod 14 to enable the inner rod 14 to move forward and backward, and the inner rod 14 can rotate around the axial direction of the inner rod 14 relative to the actuating rod 20; the disassembly and the assembly are also very convenient.

As shown in fig. 1, the surgical scissors further comprise an electrocoagulation assembly 6 arranged on the fixed handle 2, a contact 26 of the electrocoagulation assembly 6 is in contact with the action rod 20, and the scissors portion 7, the inner rod 14 and the action rod 20 are all made of metal materials.

The far end and the near end are relative to a user of the surgical scissors, the end far away from the operator is the far end, and the end close to the operator is the near end; the back and forth motion is also relative to the user of the surgical shears, with the end away from the operator being forward and the end closer to the operator being rearward.

When the movable handle 2 is opened relative to the fixed handle 1, the action rod 20 is driven by the connecting sheet 17 to move towards the far end, the action rod 20 drives the inner rod 14 to move towards the far end, and the scissor parts 7 are opened (opened) under the action of the inner rod 14;

when the movable handle 2 is closed relative to the fixed handle 1, the action rod 20 is driven by the connecting piece 17 to move towards the near end, the action rod 20 drives the inner rod 14 to move towards the near end, the scissor part 7 is closed under the action of the inner rod 14, and the tissue to be sheared, which is arranged between the first scissor blade 10 and the second scissor blade 11, is sheared.

The method for mounting and dismounting the surgical scissors of the invention is as follows.

During the installation, let the distal direction motion of tong lever portion (being outer tube 13 and inner rod 14) pass locking cap 4, slide the ball portion 22 of inner rod 14 near-end in the cylinder recess 21 of action pole 20, then make fixing base 23 that links to each other with the outer tube 13 near-end be located locking cap 4 to with locking cap 4 screw up the distal end of thumb wheel 3, fixing base 23 is locked between locking cap 4 and thumb wheel 3, when manual rotation thumb wheel 3, outer tube 13 and inner rod 14 rotate along with thumb wheel 3.

During the dismantlement, unscrew locking cap 4 and with locking cap 4 and thumb wheel 3, locking cap 4 moves certain distance back to the distal end along outer tube 13, can separate inner rod 14 with action pole 20, has realized the separation of pincers lever part 5 with handle portion. When the scissors are used again, the outer sleeve 13, the inner rod 14 and the scissors 7 are replaced with new ones. Wherein, locking cap 4 can used repeatedly, also can be disposable. The thumb wheel 3 can also be easily replaced if necessary.

It should be noted that: to achieve the detachable rotatable connection of action rod 20 and inner rod 14, it is also possible to adopt different ways from the above-described embodiments, such as: the proximal end of the inner rod 14 is provided with a neck part 14.1, the proximal end of the neck part 14.1 is connected with a ball part 22, and the diameter of the neck part 14.1 is smaller than that of the ball part 22; the distal end of the actuating shaft 20 has a claw portion (not shown) for receiving the ball portion 22, the claw portion includes three or more claws (not shown) arranged at intervals in the circumferential direction, the inner surfaces of the claws are concave, and the inner diameter of the distal end of the claw portion is larger than the diameter of the neck portion 14.1 and smaller than the diameter of the ball portion 22. The proximal end of the inner rod 14 and the distal end of the actuating rod 20 can be detachably connected through the snap-fit movement, and the forward and backward movement (axial movement) of the actuating rod 20 after the connection can be transmitted to the inner rod 14 to enable the inner rod 14 to move forward and backward, and the inner rod 14 can rotate around the axial direction of the inner rod 14 relative to the actuating rod 20. This connection is more advantageous for actuating rod 20 to transmit thrust forces to inner rod 14 rather than tension forces. In the above embodiment, the actuating rod 20 pulls the inner rod 14 to perform the cutting action of the cutting portion 7, and those skilled in the art can understand that: the handle portion may also be configured to: the inner rod 14 is pushed to realize the shearing action of the shear part 7, for example, the inclination direction of the sliding grooves 27 of the first shear blade 10 and the second shear blade 11 is changed; or take other forms of scissors.

The form and the mounting manner of the scissor portion 7 may employ a conventional technique such as the scissor structures disclosed in patent document 2 (publication No. CN107928724 a), patent document 3 (publication No. CN 209404944U) and patent document 4 (publication No. CN111616775 a).

The handle portion may take various forms as in the prior art, as long as the movement of the fixed handle 1 can drive the operation rod 20 to move axially, such as the operation handles and the connection structures thereof disclosed in patent document 1 (publication No. CN110477999 a), patent document 2 (publication No. CN107928724 a), patent document 5 (publication No. CN 112674862A) and patent document 6 (publication No. CN 102225026B).

The embodiments of the present invention are described above with reference to the drawings, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention is not limited to the above-described embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The surgical scissors comprise a handle part and a forceps rod part (5), wherein the handle part comprises a fixed handle (1) and a movable handle (2), the forceps rod part (5) comprises an outer sleeve (13) and an inner rod (14) sleeved in the outer sleeve (13), and the distal end of the forceps rod part (5) is provided with a scissors part (7); the movable handle (2) can move relative to the fixed handle (1) so as to realize the opening and closing action of the scissors part (7); the surgical scissors are characterized by further comprising a locking cap (4) and a poking wheel (3);

the far end of the thumb wheel (3) is provided with an external thread, the center of the thumb wheel (3) is provided with a central sleeve (25) extending towards the proximal direction, a central through hole of the central sleeve (25) penetrates through the thumb wheel (3), and the proximal end of the central sleeve (25) is provided with an external thread;

the locking cap (4) is provided with a through hole, the diameter of the far end of the through hole is smaller than that of the near end of the through hole, and the near end of the through hole is an internal threaded hole;

the fixed handle (1) is provided with a through fixed handle through hole, the central sleeve (25) is sleeved in the through hole of the fixed handle, the near end of the central sleeve (25) is in threaded connection with a thumb wheel nut (16), and the outer diameters of the thumb wheel nut (16) and the thumb wheel (3) are both larger than the diameter of the through hole of the fixed handle;

the central sleeve (25) is sleeved on the action rod (20), the far end of the action rod (20) is detachably and rotatably connected with the near end of the inner rod (14), and the movable handle (2) is used for driving the action rod (20) to move along the axis of the central sleeve (25);

the inner of outer tube (13) is connected with fixing base (23), the external diameter of fixing base (23) is greater than the distal end diameter of through-hole, is less than the near-end diameter of through-hole, works as locking cap (4) with thumb wheel (3) threaded connection back, fixing base (23) are positioned locking cap (4) with between thumb wheel (3), inner lever (14) run through fixing base (23).

2. The surgical scissors according to claim 1, wherein the dial wheel (3) can rotate relative to the fixed handle (1) after the proximal end of the central sleeve (25) is in threaded connection with a dial wheel nut (16), and a plurality of protrusions (24) are arranged on the outer surface of the dial wheel (3) at intervals in the circumferential direction.

3. Surgical scissors according to claim 1, characterized in that the proximal end of the actuating lever (20) is hinged to the distal end of a connecting piece (17), the proximal end of the connecting piece (17) is hinged to the movable handle (2) and the movable handle (2) is hinged to the movable handle (2).

4. The surgical scissors according to claim 1, wherein the scissor portion (7) comprises a first scissor blade (10) and a second scissor blade (11), the first scissor blade (10) and the second scissor blade (11) are hinged to the outer sleeve (13) by a first scissor pin (9), the first scissor blade (10) and the second scissor blade (11) each have a slot (27), the slots (27, 27) of the first scissor blade (10) and the slots (27) of the second scissor blade (11) are at an angle to each other, the distal end of the inner rod (14) has a second scissor pin (15), and the second scissor pin (15) is simultaneously inserted into the slots (27) of the first scissor blade (10) and the second scissor blade (11).

5. Surgical scissors according to claim 1, characterized in that the inner rod (14) has a neck (14.1) at its proximal end, a ball (22) being connected to the neck (14.1) at its proximal end, the neck (14.1) having a diameter smaller than the diameter of the ball (22); the distal end of the action rod (20) is provided with an end slit (20.1) for accommodating the neck part (14.1) and a cylindrical groove (21) for accommodating the ball part (22), the extending direction of the cylindrical groove (21) is perpendicular to the axis of the action rod (20), and the end slit (20.1) and the cylindrical groove (21) both extend to the outer surface of the action rod (20).

6. Surgical scissors according to claim 1, characterized in that the inner rod (14) has a neck portion (14.1) at its proximal end, a ball portion (22) being connected to the proximal end of the neck portion (14.1), the neck portion (14.1) having a diameter smaller than the diameter of the ball portion (22); the far end of the action rod (20) is provided with a claw part for accommodating the ball part (22), the claw part comprises more than three claws arranged at intervals in the circumferential direction, the inner surfaces of the claws are concave surfaces, and the inner diameter of the far end of the claw part is larger than the diameter of the neck part (14.1) and smaller than the diameter of the ball part (22).

7. The surgical scissors according to claim 1, further comprising an electric coagulation assembly (6) arranged on the fixed handle (1), wherein a contact of the electric coagulation assembly (6) is in contact with the action rod (20), and the scissors portion (7), the inner rod (14) and the action rod (20) are made of metal.

8. Surgical scissors according to claim 1, characterized in that the outer sleeve (13) is a metal tube, and the outer surface of the outer sleeve (13) is also sheathed with an insulating sleeve (12).