CN216754554U

CN216754554U - Ultrasonic surgical instrument

Info

Publication number: CN216754554U
Application number: CN202122983699.6U
Authority: CN
Inventors: 李益民; 李霹; 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: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-06-17
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses an ultrasonic surgical instrument which comprises an ultrasonic transducer, a waveguide rod, an inner sleeve, an outer sleeve, a clamping arm, a front movable handle and a rear fixed handle, wherein the clamping arm is hinged with the inner sleeve; the rear fixed handle is fixedly connected with the near end of the inner sleeve, and the front movable handle is movably connected with the rear fixed handle; the front actuating handle is used for driving the outer sleeve to move relative to the inner sleeve. The clamping and opening actions of the clamping arm are directly driven by the connecting rod, so that the opening size (amplitude) of the clamping arm is obviously increased compared with the prior art, and the adaptability of the ultrasonic surgical instrument to a narrow space area in the traditional open surgery is improved.

Description

Ultrasonic surgical instrument

Technical Field

The utility model relates to an ultrasonic surgical instrument, belongs to the technical field of ultrasonic medical instruments, and particularly relates to an ultrasonic surgical instrument used in open surgery.

Background

Medical ultrasonic knives are increasingly used because of their advantages such as high efficiency and small thermal damage. However, there are two types of surgical instruments commonly used in current practice, one type is a surgical instrument used in laparoscopic surgery, the maximum opening size of the front end jaw part of the surgical instrument is limited, a position with a thick tissue thickness cannot be clamped, and the structure is complicated, such as in a prior patent of the applicant (publication number CN 110584751A). The other type is ultrasonic surgical scissors used in open surgery, the instrument is suitable for the use scenes of most open surgeries, but the instrument is still greatly limited when being used in narrow and deep spaces.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art and increase the opening size of the jaw of the ultrasonic knife, the utility model provides an ultrasonic surgical instrument, and the specific technical scheme is as follows.

An ultrasonic surgical instrument comprises an ultrasonic transducer, a waveguide rod, an inner sleeve and an outer sleeve, wherein the inner sleeve is sleeved on the waveguide rod, the outer sleeve is sleeved on the inner sleeve, the waveguide rod penetrates through the inner sleeve, and the near end of the waveguide rod is connected with the ultrasonic transducer; the method is characterized in that:

the ultrasonic surgical instrument further comprises a clamping arm, a front moving handle and a rear fixed handle, wherein the clamping arm is hinged with the inner sleeve, the near end of the clamping arm is hinged with one end of a connecting rod, and the other end of the connecting rod is hinged with the far end of the outer sleeve;

the rear fixed handle is fixedly connected with the near end of the inner sleeve, and the front movable handle is movably connected with the rear fixed handle; the front movable handle is used for driving the outer sleeve to move relative to the inner sleeve, when the front movable handle moves towards the direction close to the rear fixed handle, the outer sleeve moves towards the near end, and the far end of the clamping arm moves towards the direction close to the far end of the waveguide rod to execute clamping action; when the front movable handle moves towards the direction far away from the rear fixed handle, the outer sleeve moves towards the far end, and the far end of the clamping arm moves towards the direction far away from the far end of the wave guide rod to execute opening action.

By adopting the technical scheme, the clamping and opening actions of the clamping arm are directly driven by the connecting rod, so that the opening size (amplitude) of the clamping arm is obviously increased compared with the prior art, and the adaptability of the ultrasonic surgical instrument to a narrow space area in the traditional open surgery is improved.

Further, be provided with the cushion subassembly on the centre gripping arm, the cushion subassembly includes mount pad and cushion, the mount pad with the centre gripping arm is connected, the cushion is fixed in the mount pad. When the far end of the clamping arm moves towards the waveguide rod to perform clamping action, the cushion block and the waveguide rod form a clamp to clamp the tissue between the cushion block and the waveguide rod.

Preferably, the cross-section of mount pad is the T type, the mount pad with the centre gripping arm is articulated, the mount pad has two to the spacing lug that the centre gripping arm is outstanding, two spacing lug distributes the mount pad with the both sides of the articulated axis of centre gripping arm. The two limiting lugs are distributed on two sides of the hinge axis similarly to a seesaw, so that the cushion block component can rotate around the hinge axis within a certain angle range, and clamped tissues are enabled to be more attached to the waveguide rod and the cushion block.

Further, the ultrasonic surgical instrument further comprises a sliding block, a force limiting spring and a return spring; the outer sleeve is sleeved with the sliding block and the force limiting spring, the sliding block and the force limiting spring are located between the first flange and the second flange, the near end of the force limiting spring abuts against the second flange, the far end of the force limiting spring abuts against the sliding block, and the first flange is used for limiting the limit position of the sliding block in the far end direction;

a positioning shaft is arranged on the sliding block, and at least one part of the positioning shaft is arranged in the sliding groove of the front moving handle in a penetrating way;

the reset spring is sleeved on the inner sleeve, the near end of the reset spring is abutted to the rear fixed handle, and the far end of the reset spring is abutted to the second flange. An operator can hold the front movable handle and the rear fixed handle simultaneously by one hand, when the front movable handle moves towards the rear fixed handle by applying force, the front movable handle can drive the sliding block to move towards the near end direction on the outer sleeve through the positioning shaft, and the sliding block can compress the force limiting spring to push the second flange (outer sleeve) to move towards the far end direction (simultaneously compress the reset spring), so that the clamping arm executes the clamping action. When an operator loosens the front movable handle, the force limiting spring and the reset spring both extend automatically, so that the outer sleeve moves towards the far end direction (the movement limit position of the outer sleeve can be realized by arranging a stop on the inner sleeve), the clamping arm is kept in an open state, and the sliding block moves to the position abutting against the first flange.

Preferably, the spring constant of the force limiting spring is greater than the spring constant of the return spring. The clamping force between the clamping arm and the waveguide rod is provided by a force limiting spring, the combined force of the clamping force and the reset spring is equal to the elastic force generated by the compression of the force limiting spring, and the advantage that the elastic coefficient of the force limiting spring is larger than that of the reset spring is that the sliding block can generate larger clamping force when moving for a smaller distance. In addition, through the design of the length (size) of the sliding groove (or the arrangement of a limit stop on the rear fixed handle), the limit position of the positioning shaft (sliding block) moving towards the proximal direction can be limited, and the maximum clamping force provided by the clamping arm can be set through setting the limit position, namely, the elastic force provided by the force limiting spring minus the elastic force of the return spring when the sliding block is at the limit position in the proximal direction.

Further, the front moving handle is hinged with the rear fixed handle, or the front moving handle is connected with the rear fixed handle in a sliding mode.

Further, the ultrasonic transducer is detachably fixed to the rear fixed handle.

The clamping and opening actions of the clamping arm are directly driven by the connecting rod, so that the opening size (amplitude) of the clamping arm is obviously increased compared with the prior art, and the adaptability of the ultrasonic surgical instrument to a narrow space area in the traditional open surgery is improved.

Drawings

FIG. 1 is a schematic view of an ultrasonic surgical instrument of the present invention;

FIG. 2 is an enlarged schematic view of the proximal end region of the outer cannula of the ultrasonic surgical device of the present invention;

fig. 3 is an enlarged schematic view of the distal end region of the clamp arm.

In the figure: the device comprises a cushion block assembly 1, a cushion block 101, a mounting seat 102, a limit bump 1021, a hinge axis 1022, a clamping arm 2, an inner sleeve 3, a connecting rod 4, an outer sleeve 5, a sliding block 6, a positioning shaft 601, a front movable handle 7, a sliding groove 701, a force limiting spring 8, a return spring 9, a rear fixed handle 10, an ultrasonic transducer 11, a waveguide rod 12, a first flange 501 and a second flange 502.

Detailed Description

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

Referring to fig. 1-3, an ultrasonic surgical instrument comprises an ultrasonic transducer 10, a waveguide rod 12, an inner sleeve 3, an outer sleeve 5, a clamping arm 2, a front movable handle 7 and a rear fixed handle 10, wherein the inner sleeve 3 is sleeved on the waveguide rod 12, the outer sleeve 5 is sleeved on the inner sleeve 4, the waveguide rod 12 penetrates through the inner sleeve 3, and the proximal end of the waveguide rod 12 is connected with the ultrasonic transducer 11;

the clamping arm 2 is hinged with the inner sleeve 3, the near end of the clamping arm 2 is hinged with one end of a connecting rod 4, and the other end of the connecting rod 4 is hinged with the far end of the outer sleeve 5; here, the proximal end and the distal end are relative to an operator (usually a surgeon), and the end closer to the operator is the proximal end, and the end far from the operator is the distal end.

The rear fixed handle 10 is fixedly connected with the near end of the inner sleeve 3, and the front movable handle 7 is hinged with the rear fixed handle 10; the front movable handle 7 is used for driving the outer sleeve 5 to move relative to the inner sleeve 3, when the front movable handle 7 moves (rotates) in a direction close to the rear fixed handle 10, the outer sleeve 5 moves towards the near end, and the far end of the clamping arm 2 moves in a direction close to the far end of the waveguide rod 12 to perform clamping action; when the front movable handle 7 moves (rotates) in a direction away from the rear fixed handle, the outer sleeve 5 moves to the far end, and the far end of the clamping arm 2 moves in a direction away from the far end of the waveguide rod 12 to perform an opening action. The clamping and opening actions of the clamping arm 2 are directly driven by the connecting rod 4, so that the opening size (amplitude) of the clamping arm is obviously increased compared with the prior art, and the adaptability of the ultrasonic surgical instrument to a narrow space area in the traditional open surgery is improved.

Preferably, the clamping arm 2 is provided with a cushion block assembly 1, the cushion block assembly 1 comprises a mounting seat 102 and a cushion block 101, the cross section of the mounting seat 102 is in a T shape, the mounting seat 102 is hinged to the clamping arm 2, and the cushion block 101 is fixed to the mounting seat 102. When the distal end of the gripping arm 2 moves toward the waveguide rod 12 for gripping action, the pad 101 and the distal end (blade) of the waveguide rod 12 both form a gripper that grips tissue between the pad 101 and the waveguide rod 12. Preferably, the mounting seat 102 has two limit protrusions 1021 protruding towards the clamping arm 2, and the two limit protrusions 1021 are distributed on two sides of the hinge axis 1022 of the mounting seat 102 and the clamping arm 2. The two limit protrusions 1021 are distributed on two sides of the hinge axis 1022 similar to a seesaw, so that the cushion block assembly 1 can rotate around the hinge axis 1022 within a certain angle range, and clamped tissues can be more attached to the waveguide rod 12 and the cushion block 101. The mounting seat 102 can be of a metal structure and has good structural rigidity, the cushion block 101 is made of a high polymer material and has good wear resistance, and the mounting seat and the cushion block are combined and fixed in a bonding or secondary injection molding or mechanical structure connection mode.

The ultrasonic surgical instrument also comprises a slide block 6, a force limiting spring 8 and a return spring 9; a first flange 501 and a second flange 502 are arranged at the proximal end of the outer sleeve 5 at intervals, the slider 6 and the force limiting spring 8 are sleeved on the outer sleeve 5, the slider 6 and the force limiting spring 8 are positioned between the first flange 501 and the second flange 502, the proximal end of the force limiting spring 8 is abutted against the second flange 502, the distal end of the force limiting spring 8 is abutted against the slider 6, and the first flange 501 is used for limiting the limit position of the slider 6 in the distal direction;

a positioning shaft 601 is arranged on the slide block 6, and at least one part of the positioning shaft 601 is arranged in the sliding groove 701 of the front moving handle 7 in a penetrating way; the minimum angle between the front movable handle 7 and the rear fixed handle 10 can be defined by the design of the sliding slot 701 (of course, a limit stop can be provided on the rear fixed handle 10 to define the minimum angle), and the rotation of the front movable handle 7 can be converted into the sliding movement of the sliding block 6 on the outer sleeve 5 through the positioning shaft 601. The return spring 9 is sleeved on the inner sleeve 3, the proximal end of the return spring 9 abuts against the rear fixed handle 10, and the distal end of the return spring 9 abuts against the second flange 502. Preferably, the spring constant of the force limiting spring 8 is greater than the spring constant of the return spring 9.

When the spacer 101 is in contact with the waveguide rod 12 or when tissue is sandwiched between the spacer 101 and the waveguide rod 12, the clamping force of the clamp arm 2 can be controlled by the amount of compression of the force limiting spring 8.

The waveguide rod 12 and the ultrasonic transducer 11 are of an integral or separate structure, that is, the ultrasonic transducer 11 is detachably fixed on the rear fixed handle 10 or fastened on the rear fixed handle 10 and is not usually detached. To enable the detachable connection, a slide and snap or other quick-mounting structure may be provided on the ultrasonic transducer 11.

In addition, it should be noted that fig. 1 illustrates the front movable handle 7 hinged to the rear fixed handle 10, but those skilled in the art can understand that: the front movable handle 7 and the rear fixed handle 10 can be connected in a sliding manner, and the opening and closing control of the holding arm 2 can be realized.

An operator can hold the front movable handle 7 and the rear fixed handle 10 by one hand simultaneously, when the front movable handle 7 moves towards the rear fixed handle 10 by applying force, the front movable handle 7 can drive the sliding block 6 to move towards the proximal direction on the outer sleeve 5 through the positioning shaft 601, and the sliding block 6 can compress the force limiting spring 8 to push the second flange 502 and the outer sleeve 5 to move towards the distal direction (and simultaneously compress the reset spring 9), so that the clamping arm 2 performs clamping action. When an operator loosens the front movable handle 7, the force limiting spring 8 and the reset spring 9 both automatically extend, so that the outer sleeve 5 moves towards the far end direction (the movement limit position of the outer sleeve 5 can be realized by arranging a stop on the inner sleeve 3), the clamping arm 2 keeps an open state, the slide block 6 moves to a position abutting against the first flange 501, and the force limiting spring 8 keeps a certain state and a compressed state.

The vibration isolation ring made of silica gel or other soft rubber is arranged at the vibration node on the outer side of the waveguide rod 12, so that the influence of the vibration of the waveguide rod on the inner sleeve can be effectively isolated, and the radial limit of the waveguide rod can be realized.

The ultrasonic transducer 11 is not different from a common transducer, and functions to convert electric energy of a host (generator) into mechanical energy. When the ultrasonic surgical instrument is used, the ultrasonic transducer 11 is connected to a main machine (not shown), and the wave guide rod 12 is excited by a foot switch of the main machine to perform a cutting operation.

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 utility model as defined in the appended claims.

Claims

1. An ultrasonic surgical instrument comprises an ultrasonic transducer (11), a waveguide rod (12), an inner sleeve (3) and an outer sleeve (5), wherein the inner sleeve (3) is sleeved on the waveguide rod (12), the outer sleeve (5) is sleeved on the inner sleeve (3), the waveguide rod (12) penetrates through the inner sleeve (3), and the near end of the waveguide rod (12) is connected with the ultrasonic transducer (11); the method is characterized in that:

the ultrasonic surgical instrument further comprises a clamping arm (2), a front moving handle (7) and a rear fixed handle (10), wherein the clamping arm (2) is hinged with the inner sleeve (3), the near end of the clamping arm (2) is hinged with one end of a connecting rod (4), and the other end of the connecting rod (4) is hinged with the far end of the outer sleeve (5);

the rear fixed handle (10) is fixedly connected with the near end of the inner sleeve (3), and the front movable handle (7) is movably connected with the rear fixed handle (10); the front movable handle (7) is used for driving the outer sleeve (5) to move relative to the inner sleeve (3), when the front movable handle (7) moves towards the direction close to the rear fixed handle (10), the outer sleeve (5) moves towards the near end, and the far end of the clamping arm (2) moves towards the direction close to the far end of the waveguide rod (12) to perform clamping action; when the front movable handle (7) moves towards the direction far away from the rear fixed handle (10), the outer sleeve (5) moves towards the far end, and the far end of the clamping arm (2) moves towards the direction far away from the far end of the waveguide rod (12) to execute opening action.

2. An ultrasonic surgical instrument according to claim 1, wherein a pad assembly (1) is arranged on the clamping arm (2), the pad assembly (1) comprises a mounting seat (102) and a pad (101), the mounting seat (102) is connected with the clamping arm (2), and the pad (101) is fixed on the mounting seat (102).

3. The ultrasonic surgical device according to claim 2, wherein the mounting seat (102) has a T-shaped cross section, the mounting seat (102) is hinged to the clamping arm (2), the mounting seat (102) has two limiting protrusions (1021) protruding toward the clamping arm (2), and the two limiting protrusions (1021) are distributed on two sides of a hinge axis (1022) of the mounting seat (102) and the clamping arm (2).

4. The ultrasonic surgical instrument of claim 1, further comprising a slider (6), a force limiting spring (8), and a return spring (9); a first flange (501) and a second flange (502) are arranged at the proximal end of the outer sleeve (5) at intervals, the sliding block (6) and the force limiting spring (8) are sleeved on the outer sleeve (5), the sliding block (6) and the force limiting spring (8) are positioned between the first flange (501) and the second flange (502), the proximal end of the force limiting spring (8) abuts against the second flange (502), the distal end of the force limiting spring (8) abuts against the sliding block (6), and the first flange (501) is used for limiting the limit position of the sliding block (6) in the distal direction;

a positioning shaft (601) is arranged on the sliding block (6), and at least one part of the positioning shaft (601) is arranged in a sliding groove (701) of the front moving handle (7) in a penetrating manner;

the return spring (9) is sleeved on the inner sleeve (3), the near end of the return spring (9) is abutted to the rear fixed handle (10), and the far end of the return spring (9) is abutted to the second flange (502).

5. An ultrasonic surgical instrument according to claim 4, characterized in that the spring constant of the force limiting spring (8) is greater than the spring constant of the return spring (9).

6. An ultrasonic surgical instrument according to claim 1, characterized in that said forward movable handle (7) is hinged to said rear fixed handle (10) or said forward movable handle (7) is slidingly connected to said rear fixed handle (10).

7. An ultrasonic surgical instrument according to claim 1, wherein said ultrasonic transducer (11) is detachably secured to said rear stem (10).