CN116616864A - Clamping assembly applicable to ultrasonic electric knife - Google Patents

Abstract

The embodiment of the disclosure provides a clamping assembly suitable for an ultrasonic electric knife, which comprises a clamping arm, a clamping arm electrode, a tissue pad and an elastic supporting piece, wherein the clamping arm is in a strip shape which is matched with a knife head, the proximal end of the clamping arm is used for connecting an inner sleeve and an outer sleeve of the ultrasonic electric knife, and the distal end of the clamping arm forms a containing groove; the arm clamping electrode is arranged on the surface of the arm clamping electrode, which contacts human tissues; the tissue pad is arranged in the accommodating groove of the clamping arm, and the upper surface of the tissue pad is used for contacting human tissues; the elastic support piece is arranged between the lower part of the tissue pad and the accommodating groove. According to the technical scheme of the embodiment of the disclosure, the elastic support piece is additionally arranged at the bottom of the tissue pad, when the clamping arms clamp human tissues, the clamping arm electrodes can normally contact the human tissues to discharge, the tissue pad can provide good supporting force, the clamping force of the clamp jaws on the human tissues is enhanced, and surgical cutting is facilitated.

Description

Clamping components for ultrasonic electrosurgical unit

technical field

This specification relates to the technical field of medical devices, in particular to a clamping assembly suitable for an ultrasonic electrosurgical unit.

Background technique

The ultrasonic knife used in surgery is an ultrasonic-based surgical instrument that converts ultrasonic signals into mechanical vibrations through an ultrasonic transducer, and is often used for tissue cutting. High-frequency electrotome (referred to as electrotome) is also a commonly used surgical instrument, which is often used for sealing blood vessels and needs high-frequency electric energy to drive. Ultrasonic electrosurgical knife is a surgical instrument with the functions of ultrasonic knife and electric knife. It can act on human tissue with ultrasonic vibration energy and high-frequency electric energy at the same time, and has the advantages of fast cutting speed and good coagulation effect.

The operating end of the ultrasonic electrosurgical unit is a clamp, which is used to hold human tissue to perform surgical operations. The clamp is composed of a cutter head and a clamping component, through which the ultrasonic vibration energy and high-frequency electric energy are provided to the clamped human tissue to complete the cutting and coagulation of the human tissue.

The clamping component is a very important operating part in the ultrasonic electrosurgical unit, especially the structural relationship between the clamping arm electrode and the tissue pad in the clamping component will have an important impact on the application effect of the ultrasonic electrosurgical unit, which needs to be specially designed to adapt to the ultrasonic Application scenarios of electric knife.

Contents of the invention

In order to solve the problems in the related art, embodiments of the present disclosure provide a clamping assembly suitable for an ultrasonic electrosurgical unit.

The present disclosure provides a clamping assembly suitable for an ultrasonic electrosurgical unit, including:

The clamp arm has a strip shape adapted to the cutter head. The proximal end of the clamp arm is used to connect the inner sleeve and the outer sleeve of the ultrasonic electrosurgical knife. The distal end of the clamp arm forms a receiving groove. Under the action of the relative movement of the inner sleeve and the outer sleeve, the distal end of the clamping arm is in an open or closed state relative to the cutter head, and cooperates with the cutter head to clamp the human tissue;

The electrode of the clamping arm is arranged on the surface of the clamping arm that contacts the human tissue. When the clamping arm clamps the human tissue, the electrode of the clamping arm and the cutter head constitute two electrodes of a high-frequency circuit and act on the human tissue ;

a tissue pad, arranged in the accommodating groove of the clamp arm, the upper surface of the tissue pad is used to contact human tissue; and

The elastic support is arranged between the tissue pad and the accommodating groove. When the clamp arm clamps the human tissue, the tissue pad moves towards the clamped human tissue under the action of the elastic support. Support is provided, and when the clamp arm is not clamping human tissue, the tissue pad is at a high position under the action of the elastic support member.

According to the technical solution of the embodiment of the present disclosure, by installing an elastic support at the bottom of the tissue pad, when the clamp arm is clamping human tissue, the electrode of the clamp arm can normally contact with the human tissue and discharge, and the tissue pad can provide good supporting force , enhance the clamping force of the clamp on human tissue, which is beneficial to surgical cutting, and can also prevent the risk of short circuit caused by contact between the knife head and the electrode of the clamp arm when the clamp arm is empty, and improve the safety of superelectric hybrid surgical operations.

Description of drawings

Other features, objects and advantages of the present disclosure will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings.

FIG. 1 schematically shows a schematic diagram of the connection of an ultrasonic electrosurgical unit to which an embodiment of the present disclosure is applied;

FIG. 2 schematically shows a partial enlarged view of the clamp of the ultrasonic electrocautery according to an embodiment of the present disclosure;

Fig. 3 schematically shows the internal structure of the accommodating groove of the clip arm of the embodiment of the present disclosure;

Fig. 4 schematically shows a schematic structural view of a tissue pad according to an embodiment of the present disclosure;

Fig. 5 schematically shows the cross-section of the tissue pad installed in the accommodating groove in an embodiment of the present disclosure;

Fig. 6 schematically shows an example of a first reed having four ends in an embodiment of the present disclosure;

Fig. 7 schematically shows the cross-section of the clip arm installed with the first reed in the embodiment of the present disclosure;

Fig. 8 schematically shows the structural diagram of the clip arm with the second reed installed in the embodiment of the present disclosure;

Fig. 9 schematically shows a partial enlarged view of the installation position of the second reed in the embodiment of the present disclosure;

Fig. 10 schematically shows the cross-section of the clip arm after the second reed is installed in the embodiment of the present disclosure;

Fig. 11 schematically shows the clip arm structure in which the elastic support is a spring in an embodiment of the present disclosure;

Figure 12 schematically shows an example of an embedded electrode in an embodiment of the present disclosure;

Figure 13 schematically illustrates a schematic view of a cannula assembly of an embodiment of the present disclosure.

Detailed ways

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily realize them. Also, for clarity, parts not related to describing the exemplary embodiments are omitted in the drawings.

In this specification, it should be understood that terms such as "comprising" or "having" are intended to indicate the presence of features, numbers, steps, acts, components, parts or combinations thereof disclosed in this specification, and are not intended to exclude a or a plurality of other features, numbers, steps, acts, parts, parts or combinations thereof exist or are added.

In addition, it should be noted that, in the case of no conflict, the embodiments in this specification and the features in the embodiments can be combined with each other. The following will describe in detail with reference to the accompanying drawings and embodiments.

First of all, it should be noted that in the various embodiments described below, the "proximal end" of the waveguide, the inner sleeve, the outer sleeve, the clamp arm, the tissue pad or the limit post all refers to the end of the component that is close to the handle , "distal end" refers to the end of the part away from the handle and close to the jaw opening. The longitudinal direction refers to the direction along which the clamp arm extends to the handle, and the vertical direction refers to the direction in which the clamp arm opens and closes relative to the cutter head.

Figure 1 is a schematic diagram of connections when using an ultrasonic electrosurgical unit. In FIG. 1 , the handle 800 of the ultrasonic electrocautery is connected to a transducer 900 to obtain driving energy, namely ultrasonic vibration and high-frequency electric energy. The clamp at the distal end of the ultrasonic electrosurgical knife is connected to the handle 800 through the outer sleeve 100, and conducts the driving energy to the clamp to perform surgical operations.

The clamp arm 400 and the cutter head 300 constitute two clamping branches of the ultrasonic electrotome clamp, which can realize clamping and cutting of human tissue. The cutter head 300 and the waveguide rod are of an integral structure, and the proximal end of the waveguide rod is coupled to the transducer 900 to transmit ultrasonic vibrations to the cutter head 300 at the distal end. The waveguide rod can also be connected with an electrode of the high-frequency circuit to form an electrode of the bipolar electric knife. The clip arm 400 is connected to another electrode of the high-frequency circuit through the outer sleeve 100 . There is an inner sleeve 200 inside the outer sleeve 100 , and a waveguide rod is inside the inner sleeve 200 . By actuating the trigger of the handle 800 , the inner and outer tubes can be relatively displaced, thereby driving the clamping arm 400 to open or close, and cooperate with the cutter head 300 to clamp human tissue.

As shown in Figure 2, it is a partial enlarged view of the jaw of the ultrasonic electrosurgical unit. In FIG. 2 , the proximal ends of the outer cannula 100 , the inner cannula 200 and the cutting head 300 are coupled with the handle of the ultrasonic electrocautery to obtain corresponding ultrasonic or high-frequency energy. The proximal end of the clip arm 400 is rotatably connected with the inner sleeve 200 through the claw, and rotatably connected with the outer sleeve 100 through the pin shaft. Under the action of the handle actuating trigger, the inner sleeve 200 moves back and forth, driving the clamp arm 400 to open and close relative to the inner sleeve 200 and the outer sleeve 100, and the clamp arm 400 is in an open or closed state relative to the cutter head 300, forming a pliers Clip to achieve the corresponding surgical action.

The clamp arm 400 is provided with a clamp arm electrode 410, and the clamp arm electrode 410 and the head of the knife 300 form two electrodes of a high-frequency circuit. When the clamp is clamping human tissue, the knife head and the clamp arm electrode form an electrical circuit through the human tissue. . There is also a tissue pad 420 made of insulating material on the clamping assembly. When the clamp is closed without load, the tissue pad can avoid the short circuit caused by the contact between the electrode of the clamp arm and the cutter head. When the clamp is clamping human tissue for cutting When using the tissue pad, the tissue pad can provide effective support for the clamped tissue, so as to prevent the insufficient clamping force of the clamp from affecting the cutting effect.

It can be seen that in the application scenario of the ultrasonic electrosurgical unit, the structural relationship between the clamp arm electrode and the tissue pad will have an important impact on the application effect of the ultrasonic electrosurgical unit. Based on this, the clamping assembly suitable for the ultrasonic electrosurgical unit proposed in the present disclosure can meet the above application requirements.

The specification of the present disclosure provides a clamping assembly suitable for an ultrasonic electrosurgical unit, including:

The clamp arm has a long strip shape adapted to the cutter head. The proximal end of the clamp arm is used to connect the inner sleeve and the outer sleeve of the ultrasonic electrosurgical knife. The distal end of the clamp arm forms a receiving groove for the inner sleeve and the outer sleeve. Under the action of the relative movement of the tube, the distal end of the clamp arm is in an open or closed state relative to the cutter head, and cooperates with the cutter head to clamp the human tissue;

The electrode of the clamp arm is set on the surface of the clamp arm that contacts the human tissue. When the clamp arm clamps the human tissue, the electrode of the clamp arm and the cutter head constitute two electrodes of the high-frequency circuit and act on the human tissue;

the tissue pad is arranged in the accommodation groove of the clamp arm, and the upper surface of the tissue pad is used for contacting human tissue; and

The elastic support is arranged between the tissue pad and the holding tank. When the clamp arm clamps the human tissue, the tissue pad provides support for the clamped human tissue under the action of the elastic support. When the clamp arm does not clamp the human body During organization, the tissue pad is at a high position under the action of the elastic support.

Wherein, the clamping arm is a conductor, connected to the high-frequency circuit through the connected inner sleeve and outer sleeve, and the tissue pad is made of polymer insulating material.

In FIG. 2 , a set of tooth-shaped electrodes 410 are arranged on both sides of the clamp arm 400 , extending from far to near along the clamp arm. The toothed electrode 410 and the clip arm 400 are integrally constructed, and both are conductors. The toothed electrode 410 can not only realize the conduction function, but also have a firmer grasping and blood coagulation ability. The distal end of the clamping arm 400 forms an accommodating groove, and the tissue pad 420 is disposed in the accommodating groove, and the upper surface of the tissue pad 420 is in contact with the human tissue when clamping the human tissue. Specifically, the tissue pad 420 is embedded in the accommodating groove of the clip arm 400, the distal end of the tissue pad 420 is limited by the outer edge of the accommodating groove, and the proximal end is limited by a blocking member 430, so that when the tissue pad 420 After being installed in the accommodating groove, the tissue pad 420 will not move longitudinally.

In the design, there is a contradiction in the structural relationship between the clamp arm electrode and the tissue pad. In the usual design, the toothed electrodes 410 on both sides of the clamp arm 400 are higher than the contact plane of the tissue pad 420. When the human tissue is initially clamped, the electrode teeth of the toothed electrodes 410 will support the tissue, resulting in a gap between the two sides. The contact plane of the tissue pad 420 between the side-toothed electrodes 410 cannot contact the human tissue to effectively support, resulting in insufficient clamping force, which affects the cutting effect of the ultrasonic head on the tissue. If the contact plane of the tissue pad 420 is higher than the toothed electrode 410, the toothed electrode 410 may not be able to contact the human tissue when clamping the human tissue and cannot cooperate with the cutter head to discharge, which will affect the surgical effect of using high frequency electricity for blood coagulation. For this reason, a tissue pad with elastic support is proposed in this disclosure to solve the above-mentioned design contradiction.

Furthermore, a limiting mechanism is provided in the accommodating groove to limit the vertical movement range of the tissue pad, so as to ensure that the tissue pad will not disengage from the accommodating groove.

In some embodiments, the width of the upper entrance of the accommodating tank is smaller than the width of the bottom, and the cross-sectional shape is a trapezoid with a small top and a large bottom. slots, thereby limiting the range of upward movement of the tissue pad. In such a structure of the accommodating tank, the elastic support member is arranged between the bottom of the tissue pad and the bottom surface of the accommodating tank. The elastic supporting member may be one or more of a reed with four ends, a reed with two ends or a spring. There can be multiple elastic supports, distributed in the space in the accommodating groove, so as to provide a balanced supporting force to the tissue pad.

In other embodiments, a set of limit posts are respectively provided on both sides of the accommodating tank, and limit slots matching the limit posts are provided on both sides of the tissue pad. When the tissue pad is installed in the accommodating tank, The limit post on each side extends into the limit groove on the corresponding side of the tissue pad, thereby limiting the vertical movement range of the tissue pad, as shown in FIG. 3 .

FIG. 3 shows the internal structure of the holding tank of the clamp arm 400 . There are two sets of position-limiting piles 440 located in the holding tank, respectively located on both sides of the holding tank. There may be a plurality of spacer posts 440 on each side separated from each other. As shown in Fig. 3, two separated spacer piles are arranged symmetrically on each side. Setting limit piles on both sides of the accommodating groove can obtain a more stable limit effect. Setting a plurality of separated limit piles can reduce the difficulty of assembly.

Fig. 4 is a schematic diagram of the structure of the tissue pad. The upper surface 421 of the tissue pad is in contact with the clamped object to provide support during clamping. The bottom surface 424 of the tissue pad contacts the bottom of the receiving well when compressed. On both sides of the tissue pad 420, there are limit grooves that match the limit piles 440, and the cross section of the tissue pad presents a shape similar to the word "I". When the tissue pad 420 is in a high position due to the action of the elastic support, The lower bar 423 at the bottom of the limiting groove can limit the tissue pad 420 from breaking away from the limiting pile 440. When the tissue pad 420 is pressed downward, the upper bar 422 at the top of the limiting groove can limit the tissue pad 420 from being separated from the positioning pile 440. The limit post is disengaged, thus ensuring the stability and reliability of the tissue pad.

Fig. 5 is a schematic cross-sectional view when the tissue pad is installed in the accommodating groove. When the tissue pad 420 is installed in the accommodating groove of the clamp arm, the limiting posts on each side will extend into the limiting slots on the corresponding side of the tissue pad, so that the tissue pad will not be separated from the positioning post, thereby limiting the tissue pad. in the vertical range of movement. Wherein, the distance between the lower surface of the limiting pile and the bottom of the accommodating tank is d0, the thickness of the limiting pile in the accommodating tank is d1, the inner space height of the limiting groove on both sides of the tissue pad is d2, and d2 >d1, the maximum distance that the tissue pad moves vertically under the action of the elastic support and external pressure is the smaller value of (d2-d1) and d0.

Based on the structure of the above-mentioned tissue pad and the storage tank, the elastic support is arranged between the tissue pad and the storage tank, and there are various installation methods, one of which is: the elastic support is arranged at the bottom of the tissue pad and the storage tank. between the bottom surface of the groove; in another installation mode, the elastic support is arranged between the top of the limiting pile and the upper plane of the limiting groove of the tissue pad. The elastic supporting member may be one or more of a reed with four ends, a reed with two ends or a spring. Preferably, there are multiple elastic supports, which are distributed in the space in the accommodating groove, so as to provide a balanced supporting force for the tissue pad. Specifically, there are multiple elastic supports, which are distributed in two sets of limit piles The top, or, distribution is arranged in the accommodating space between two groups of limit piles.

The three implementations of the elastic support will be specifically described below by taking the clamp arm structure with the toothed electrodes and the positioning pile as shown in FIG. 3 as an example. Wherein, the elastic supporting member in the first and second embodiments is an elastic reed having a first contact portion and a second contact portion, and the elastic reed deforms when stressed to change the supporting height of the tissue pad. The elastic supporting member in the third embodiment is a spring, and when the spring is stressed, it produces compression deformation to change the supporting height of the tissue pad.

Embodiment one:

The elastic supporting member in the first embodiment is an elastic reed having a first contact portion and a second contact portion, and the elastic reed deforms when stressed. The elastic reed is specifically a first reed with four ends, wherein the two ends of the first reed are in contact with the bottom surface of the tissue pad as the first contact portion, and the other two ends are in contact with the accommodating groove as the second contact portion When the inner surface of the reed is in contact with each other, when the first reed is stressed, the four ends are respectively displaced on the contact plane, thereby changing the support height for the tissue pad. The first reed with four ends may have a configuration similar to the letter "X".

Fig. 6 is an example of a first reed having four ends, the first reed having a shape similar to the letter "X".

In FIG. 6 , the elastic supporting member is a first reed 500 installed between the bottom of the tissue pad 420 and the inner surface of the accommodating groove of the clip arm 400 . The first reed 500 can provide vertical elastic force to the tissue pad 420, so that the tissue pad 420 is in a high position under the action of the elastic force. The tissue provides better support, so that the jaws have better clamping force, which is beneficial for the cutter head 300 to use ultrasonic energy to cut the tissue. On the other hand, under the action of the first reed 500, the tissue pad 420 can keep the toothed electrode 410 on the clamp arm and the cutter head 300 at an appropriate distance, which is beneficial when the jaw uses high-frequency electric energy to perform surgery. Realize the hemostasis operation on human tissue.

The first reed 500 includes a first part 510 with two ends, a second part 520 with two other ends and a connection point 530, wherein the two ends of the first part 510 are respectively connected to the bottom surface of the tissue pad at the proximal end and accommodated therein. The inner surface of the groove is in contact, and the two ends of the second part 520 are respectively in contact with the bottom surface of the tissue pad at the distal end and the inner surface of the accommodating groove. Preferably, the connection point 530 is fixed to the bottom surface of the tissue pad, or the connection point 530 is fixed to the inner surface of the accommodating groove, so as to prevent the position of the first reed 500 from shifting.

The first part 510 and the second part 520 of the first reed 500 may have different elasticities. In some embodiments, the distance between the two ends of the second part 520 and the connection point 530 is smaller than the distance between the two ends of the first part 510 and the connection point 530, so that under the same pressure, the two ends of the second part 520 The amount of displacement generated by the ends on the contact plane is smaller than the amount of displacement generated by the two ends of the first part 510 on the contact plane. In some other embodiments, the reed thickness of the second part 520 is greater than that of the first part 510, or the reed opening angle of the second part 520 is smaller than the opening angle of the first part 510, so that under the same pressure , the two ends of the second part 520 have different elastic forces when the displacement generated by the two ends of the second part 520 is smaller than the displacement generated by the two ends of the first part 510 on the contact plane. In practice, when the tissue is clamped, the proximal end of the tissue pad 420 (the end close to the blocking member 430 ) bears a greater force than the distal end. Under such a force condition, the displacement and The displacements of the two ends of the first part 510 under pressure are basically the same, so that the proximal end and the distal end of the tissue pad 420 can be pressed down smoothly.

The first reed 500 can be replaced by two "V" shaped reeds with opposite pointed corners, and the same technical effect can also be achieved.

FIG. 7 is a cross section of the clip arm after the first reed 500 is installed. When the tissue pad 420 is pressed down, the four ends of the first reed 500 respectively produce corresponding displacements on the contacting planes, and the height of the tissue pad 420 decreases. After canceling the external force on the tissue pad 420, the first spring The four ends of the sheet 500 return to their original positions, driving the tissue pad 420 back to a high position. Simultaneously, due to the mutual resistance of the limiting grooves arranged in the tissue pad 420 and the limiting piles arranged in the accommodating groove, the height of the tissue pad 420 moving upwards will not exceed the limited range, which ensures the stability and reliability of the tissue pad.

The first reed can also be arranged between the top of the limiting pile and the upper bar of the tissue pad to achieve the same technical effect. That is, the two ends of the first reed are in contact with the bottom surface of the upper bar 422 of the tissue pad, and the other two ends are in contact with the upper surface of the limiting pile 440. When the first reed is stressed, the four ends are respectively in The contact plane produces a displacement, thereby changing the support height for the tissue pad. At this time, there are at least two first reeds, which are symmetrically arranged on both sides of the tissue pad to ensure that the tissue pad is pressed down and bounced up smoothly after being stressed.

Embodiment two:

The elastic supporting member in the second embodiment is also an elastic reed having a first contact portion and a second contact portion, and the elastic reed deforms when stressed. The elastic reed is specifically a second reed with two ends and a supporting point, the two ends of the second reed are used as the first contact part to contact the bottom surface of the tissue pad, and the supporting point of the second reed is used as the second contact The part is fixed in the accommodating groove, and when the second reed is stressed, the two ends of the reed are displaced on the contact plane, thereby changing the supporting height of the tissue pad. The second reed, having two ends, may have a shape similar to that of the letter "U".

The second reed can also be installed between the top of the limit pile and the upper bar of the tissue pad, that is, the supporting point of the second reed is fixed on the top of the limit pile, and the two ends of the second reed are connected to the top of the tissue pad. The bottom surface of the upper bar 422 is in contact, and when the second reed is stressed, the two ends are displaced on the contact plane, thereby changing the support height for the tissue pad. At this time, there are at least two second reeds, which are symmetrically arranged on both sides of the tissue pad, so as to ensure stable pressing and springing up after being stressed. Fig. 8-Fig. 10 have provided the example that the second reed is installed on the top of the limit pile.

Figures 8-10 are installation examples of the elastic support as the second reed, and the second reed has a shape structure similar to the letter "U". Wherein, FIG. 8 is a schematic diagram of the structure of the clamp arm with the second reed installed, FIG. 9 is a partial enlarged view of the installation position of the second reed, and FIG. 10 is a schematic cross-sectional view of the clamp arm after the second reed is installed.

As shown in FIGS. 8-10 , the elastic supporting member is a second reed 600 distributed on the top of the limiting pile 440 . When the tissue pad 420 is pressed down under force, the two ends of the second reed 600 will produce a corresponding displacement on the contacted plane, and the height of the tissue pad 420 will decrease. After the external force on the tissue pad 420 is removed, the second reed will The two ends of the 600 return to the original position, driving the tissue pad 420 to return to the high position. At the same time, due to the mutual resistance between the limiting grooves on the tissue pad 420 and the positioning posts in the accommodating groove, the height of the upward movement of the tissue pad 420 will not exceed the limited range, ensuring the stability and reliability of the tissue pad.

In some embodiments, two second reeds 600 are respectively provided on each side of the limiting post 440 , respectively disposed at the proximal end and the distal end of the limiting post. The second reed arranged at the proximal end has different elasticity from the second reed arranged at the far end. Under the same pressure condition, the displacement generated by the two ends of the second reed arranged at the proximal end is smaller than the displacement generated by the two ends of the second reed arranged at the far end. When the tissue is clamped, the proximal end of the tissue pad 420 is stressed more than the distal end. At this time, the displacement generated by the compression of the two ends of the second reed at the proximal end is the same as that of the two ends of the second reed at the far end. The displacement generated by the pressure is basically the same, which can keep the proximal end and the distal end of the tissue pad 420 pressed down smoothly. The second reed disposed at the proximal end and the distal end can obtain different elasticity through different curvatures, thicknesses or materials.

Embodiment three:

As shown in Figure 9, the elastic support in the third embodiment is a spring 700, one end of the spring 700 is fixed in the installation hole at the bottom of the tissue pad, and the other end is in contact with the inner surface of the accommodating groove, and the spring is compressed when the force is applied. Change the height of the support to the tissue pad. Correspondingly, the bottom of the tissue pad is provided with a mounting hole for accommodating the spring 700 . At this time, the spring 700 is located in the middle of the limiting piles on both sides of the accommodating groove.

In some embodiments, there may be a plurality of springs 700, at least two, distributed from near to far in the accommodating groove, and the plurality of springs 700 have different elasticity, and under the same pressure, they are arranged near to far. The amount of compression deformation generated by the spring at the end is smaller than the amount of compression deformation generated by the spring disposed at the distal end. In some other embodiments, there are at least three springs 700, and the distance between the springs arranged at the proximal end and the adjacent springs is smaller than the distance between the springs arranged at the far end and the adjacent springs, so that under the same pressure , the amount of deformation generated by the spring arranged at the proximal end is smaller than the amount of deformation generated by the spring arranged at the far end. When the tissue is clamped, the proximal end of the tissue pad 420 is stressed more than the distal end. At this time, the springs at the proximal end and the distal end are compressed to produce substantially the same deformation, which can keep the proximal end and the distal end of the tissue pad 420 in place. Press down steadily. The springs at the proximal end and the distal end can obtain different elasticities through different structures such as different materials or sizes.

The spring 700 can be arranged between the top of the limiting posts on both sides and the upper bar of the tissue pad, that is, one end of the spring is fixed on the top of the limiting post, and the other end is in contact with the bottom surface of the upper bar 422 of the tissue pad. Mounting holes can be set on the top of the limit pile, or at the bottom of the upper rail of the tissue pad, so as to avoid spring displacement. The spring produces compression deformation under force, thereby changing the support height of the tissue pad.

In the above three embodiments of the elastic support member, the clamp arm electrodes are tooth-shaped electrodes, with electrode teeth extending longitudinally along both sides of the clamp arm. In some other embodiments, the electrode of the clamp arm can be an embedded electrode extending upward from the inner surface of the clamp arm and embedded in the tissue pad. The tissue pad is provided with a through hole suitable for the embedded electrode. When pressed, the embedded electrode passes through the The through holes on the tissue pad are in contact with the clamped human tissue. The embedded electrode and the clamp arm are both conductors, and the embedded electrode can be in the form of points or strips. Fig. 12 schematically shows a top view of the clamp arm with embedded electrodes. In Fig. 12, 410' is a strip-shaped electrode extending from the inner surface of the clamp arm 400', embedded in the tissue pad 420', the tissue pad A hole for the electrode 410' to pass through is opened on 420'. In the clamping assembly with embedded electrodes, the structure of the elastic support can still be implemented with reference to the aforementioned three embodiments.

Based on the same inventive concept, an embodiment of the present disclosure also provides a cannula assembly suitable for an ultrasonic electrosurgical unit, including an inner cannula and an outer cannula, and also includes the clamping assembly provided by any of the above implementations, the proximal end of the clamping assembly It is rotatably connected with the inner casing and the outer casing. Figure 13 schematically illustrates a schematic view of a cannula assembly of an embodiment of the present disclosure.

As shown in Figure 13, the sleeve assembly includes an outer sleeve 122, an inner sleeve 123 and a clamp arm 124, the inner sleeve 123 is arranged inside the outer sleeve 122, and the proximal end of the clamping assembly 124 is connected to the inner sleeve 123 and the outer sleeve. 122 rotatably connected. When the inner sleeve 123 moves, the clamping assembly 124 is in an open or closed state. The structure of the clamping assembly 124 can be implemented with reference to the descriptions in FIGS. 3-12 above, and will not be repeated here.

According to the technical solution of the embodiment of the present disclosure, by installing an elastic support at the bottom of the tissue pad, when the clamp arm is clamping human tissue, the electrode of the clamp arm can normally contact with the human tissue and discharge, and the tissue pad can provide good supporting force , enhance the clamping force of the clamp on human tissue, which is beneficial to surgical cutting, and can also prevent the risk of short circuit caused by contact between the knife head and the electrode of the clamp arm when the clamp arm is empty, and improve the safety of superelectric hybrid surgical operations.

The above description is only a preferred embodiment of the present disclosure and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this disclosure is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, but should also cover the technical solutions made by the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of or equivalent features thereof. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this disclosure.

Claims (10)

1. A clamping assembly suitable for an ultrasonic electrosurgical unit, characterized in that it comprises: The clamp arm has a strip shape adapted to the cutter head. The proximal end of the clamp arm is used to connect the inner sleeve and the outer sleeve of the ultrasonic electrosurgical knife. The distal end of the clamp arm forms a receiving groove. Under the action of the relative movement of the inner sleeve and the outer sleeve, the distal end of the clamping arm is in an open or closed state relative to the cutter head, and cooperates with the cutter head to clamp the human tissue; The electrode of the clamping arm is arranged on the surface of the clamping arm that contacts the human tissue. When the clamping arm clamps the human tissue, the electrode of the clamping arm and the cutter head constitute two electrodes of a high-frequency circuit and act on the human tissue ; a tissue pad, arranged in the accommodating groove of the clamp arm, the upper surface of the tissue pad is used to contact human tissue; and The elastic support is arranged between the tissue pad and the accommodating groove. When the clamp arm clamps the human tissue, the tissue pad moves towards the clamped human tissue under the action of the elastic support. Support is provided, and when the clamp arm is not clamping human tissue, the tissue pad is at a high position under the action of the elastic support member. 2. The clamping assembly according to claim 1, wherein the elastic support member is an elastic reed having a first contact portion and a second contact portion, and the elastic reed deforms when stressed, thereby Change the support height for the tissue pad. 3. The clamping assembly according to claim 2, wherein the elastic reed is a first reed having four ends, and the two ends of the first reed serve as first contact portions with the first reed The tissue pad is in contact with the bottom surface, and the other two ends are in contact with the surface inside the accommodating groove as the second contact portion. 4. The clamping assembly according to claim 2, wherein the elastic reed is a second reed having two ends and a supporting point, and the two ends of the second reed serve as the first The contact part is in contact with the bottom surface of the tissue pad, and the support point of the second reed serves as the second contact part and is fixed on the surface inside the accommodating groove. 5. The clamping assembly according to claim 1, wherein the elastic support member is a spring, one end of the spring is fixed in the mounting hole at the bottom of the tissue pad, and the other end is connected to the accommodating groove The internal surfaces are in contact, and when the spring is stressed, compression is generated to change the supporting height of the tissue pad. 6. The clamping assembly according to claim 1, wherein a set of spacer posts are respectively provided on both sides of the accommodating groove, and a pair of spacer posts matching the spacer posts are provided on both sides of the tissue pad. Limiting slots, when the tissue pad is installed in the accommodating slot, the limiting posts on each side extend into the limiting slots on the corresponding side, thereby limiting the vertical movement of the tissue pad scope. 7. The clamping assembly according to claim 6, wherein there are a plurality of said elastic supports, and they are distributed on the tops of two groups of said limit piles, or distributed on two groups of said limit piles. in the accommodation space between the piles. 8. The clamping assembly according to claim 7, wherein the elastic force generated by the elastic support arranged at the proximal end is greater than the elastic force generated by the elastic support arranged at the distal end, so that the tissue pad is clamped Maintain a steady downward pressure while maintaining the human body tissue. 9. The clamping assembly according to claim 1, wherein the electrodes of the clamping arm are two sets of toothed electrodes extending longitudinally along both sides of the clamping arm, and the two sets of toothed electrodes are connected to the The jig arm is an integral structure. 10. The clamping assembly according to claim 1, wherein the electrode of the clamping arm is an embedded electrode extending upward from the inner surface of the clamping arm and embedded in the tissue pad, and the tissue pad is provided with Adapt to the through hole of the embedded electrode, when the tissue pad is pressed, the embedded electrode contacts the clamped human tissue through the through hole on the tissue pad.