CN217447921U - Ultrasonic scalpel head - Google Patents

Abstract

The utility model discloses an ultrasonic scalpel tool bit, including the tool bit body that is the platykurtic structure, the terminal surface that has two symmetries respectively in the thickness direction, at least one side of terminal surface is provided with cutting part along its axial, cutting part includes a surface, be provided with two at least sawtooth rows on the surface, every row of sawtooth is arranged and is followed by a sawtooth the axial arrangement of tool bit body forms, the cutting direction of sawtooth with the axial direction of tool bit body is parallel, the sawtooth is arranged and is set up side by side each other at the interval, and is adjacent cooling channel has between the sawtooth row. The cooling channel with the flow guide effect of the utility model extends from the near end to the far end of the cutter head, thereby ensuring that the cooling water can be effectively transmitted to the tip end and playing a good cooling effect on the tissues of the depth part; the cooling channel is close to the sawtooth, and can carry out heat exchange rapidly.

Description

Ultrasonic scalpel head

Technical Field

The utility model relates to the technical field of surgical instruments, specifically relate to an ultrasonic scalpel tool bit.

Background

With the rapid development of modern medicine, ultrasonic surgical instruments are increasingly applied to clinical surgical operation treatment, ultrasonic energy is applied to surgical operation, and the ultrasonic surgical instrument has the characteristics of fine cutting, safety, tissue selectivity, low-temperature hemostasis and the like, greatly enriches the means of the surgical operation, improves the quality of the surgical operation, and relieves the pain of patients to a certain extent. Wherein, the ultrasonic osteotome is an ultrasonic surgical instrument with specific application function.

Ultrasonic osteotomes generally comprise a cylindrical body having a proximal end provided with a coupling formation and a distal end provided with a cutting head, the current ultrasonic scalpel head being in the form of a smooth bone cutting blade as disclosed in US8343178, another form being disclosed in US 667117, and the distal cutting blade being in the form of a blade having a regular triangular saw tooth on either side of the blade, or another irregularly shaped bone cutting blade as disclosed in EP 3586774.

Another inevitable problem with the tooth design of the conventional serrated ultrasonic osteotome is that when the cooling water flows to the most proximal tooth surface of the serration, cavitation is generated under the action of the ultrasound, and the water flow is atomized and dispersed in the direction perpendicular to the tooth surface, as shown in fig. 20. This makes it difficult for cooling water to act on the leading tip, resulting in the appearance of thermal damage that is greater the deeper the cut, and the more difficult it is to observe the deep damage that is particularly acute when the tip is fully embedded within the tissue. The current mainstream solution is to increase the flow of the cooling liquid and to ensure that the whole cutting tissue surface is completely immersed by the cooling liquid, which is a relatively stable disposal method. However, the negative effects are that the operation visual field and the operation precision of an operator are affected, and the negative pressure liquid suction device is required to be used from time to time, the accumulated liquid is continuously sucked away, and the operation is repeated.

US6379371 discloses another cooling method for the ultrasonic scalpel head, in which a cooling channel is provided in the head to direct cooling water from the main body to the blade tip. Although such a structure can solve the cooling problem well, the structure of the ultrasonic scalpel head is inherently small, and the difficulty in machining the cooling passage in the ultrasonic scalpel head is very high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects existing in the prior art and providing the ultrasonic scalpel bit with better cooling effect.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides an ultrasonic scalpel tool bit, includes the tool bit body that is the platykurtic structure, has the terminal surface of two symmetries respectively in thickness direction, at least one side of terminal surface is provided with cutting part along its axial, cutting part includes a surface, be provided with on the surface and be listed as at least two sawtooth rows, every sawtooth row is followed by a sawtooth the axial arrangement of tool bit body forms, the cutting direction of sawtooth with the axial direction parallel of tool bit body, the sawtooth is arranged and is set up side by side at the interval each other, and is adjacent cooling channel has between the sawtooth row.

Preferably, said cooling passages are located between the roots of said adjacent rows of said serrations.

Preferably, the surface is a cutting portion axial end surface of the cutter head body, between the two symmetrical end surfaces, and the cooling passage is located above the surface.

Preferably, the surface is a cutting portion axial end surface of the tool bit body between the two symmetrical end surfaces, and the cooling channel is a passage recessed within the surface.

Preferably, the depth of the cooling channels is uniform or gradually varied from near to far.

Preferably, the cooling passage has a uniform overall width in the axial direction thereof.

Preferably, the teeth tips of two adjacent rows of the saw teeth are in the same or opposite orientation.

Preferably, the distal-most blade of the bit body is at least one of a cutting edge blade, a blunt edge blade, or a serrated edge blade.

Preferably, the rake angle γ of the saw teeth is a positive rake angle, and the tip angle β is not less than 45 °.

Preferably, the front angle γ of the saw teeth is 15 ° ± 5 °, and the rear angle α is 20 ° ± 10 °.

Preferably, the saw teeth are turtle back teeth, a gap is formed between every two adjacent saw teeth of the same saw tooth row, and the cooling channel is communicated with the gap.

Preferably, each end face of the ultrasonic bone cutter is provided with a groove.

Preferably, the cutter head comprises a cutting edge positioned at the most far end and two saw tooth rows symmetrically arranged on two sides of the cutting edge and extending along the axis of the main body.

Preferably, the blade includes a distal-most edge and a row of serrations extending along the axis of the body on one side thereof, and a cutting edge on the other side of symmetry thereof.

The beneficial effects of the utility model are mainly embodied in that:

the cooling channel with the flow guide effect extends from the near end to the knife tip part at the far end of the knife head, so that cooling water can be effectively transmitted to the tip end, and a good cooling effect is achieved on tissues at the depth part;

the cooling channel is close to the sawteeth, so that heat exchange can be rapidly carried out;

the double-row reversely-arranged hook tooth structure design ensures that enough cutting force exists in the whole period, the cutting efficiency can be improved in a multiple manner on the premise of not increasing the stress value, and the power output requirement on a host machine is reduced;

the cutter head can be well coupled with the load in the cutting process, an operator only needs to hold the cutter to cut, and the comfort degree in the use process is improved;

one side of tool bit is provided with the sawtooth row, and the opposite side of its symmetry is provided with the cutting sword, and the operator can choose the sawtooth row selectively or the cutting sword cuts, has enlarged the utility model discloses a use scene.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

FIG. 1: the utility model discloses a schematic diagram of a preferred embodiment of the ultrasonic scalpel head;

FIG. 2 is a schematic diagram: an enlarged view of portion a in fig. 1;

FIG. 3: the front view of fig. 2;

FIG. 4: FIG. 2 is a top view;

FIG. 5: the utility model discloses a schematic diagram of the characteristics of ultrasonic waves when the preferred embodiment of the ultrasonic scalpel head cuts;

FIG. 6: a schematic view of a second embodiment of the ultrasonic scalpel head of the present invention;

FIG. 7: the front view of the second embodiment of the ultrasonic scalpel head of the utility model;

FIG. 8: the cutting force of the three tooth shapes is compared and shown;

FIG. 9: a graph comparing the rake angle with the cutting force;

FIG. 10: schematic comparison of two tooth back shapes;

FIG. 11: the arrangement of the tortoise back teeth is schematic;

FIG. 12: the utility model discloses a schematic view of the knife head of the third embodiment of the ultrasonic osteotome;

FIG. 13: the utility model discloses a schematic view of a cutter head of a fourth embodiment of the ultrasonic osteotome;

FIG. 14: the utility model discloses a schematic view of the knife head of the fifth embodiment of the ultrasonic osteotome;

FIG. 15 is a schematic view of: the utility model discloses a schematic view of the other direction of the knife head of the fifth embodiment of the ultrasonic osteotomy knife;

FIG. 16: the utility model discloses a schematic view of a cutter head of a sixth embodiment of an ultrasonic osteotome;

FIG. 17: the utility model discloses a schematic view of a tool bit of a seventh embodiment of the ultrasonic osteotomy tool;

FIG. 18: the utility model discloses a schematic view of the cutter head of the eighth embodiment of the ultrasonic osteotomy knife;

FIG. 19: the utility model discloses a schematic view of a knife head of a ninth embodiment of the ultrasonic osteotomy knife;

FIG. 20: schematic diagram of ultrasonic cavitation effect generated by the prior art tool bit.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 1, the present invention discloses an ultrasonic scalpel head 100. Referring to fig. 2, the cutting head comprises a cutting head body 113 with a flat structure, the outermost end of the cutting head body 113 is a cutting edge 101, the cutting edge has two symmetrical end surfaces 106 in the thickness direction, and at least one side of the end surface 106 is provided with a cutting part 131 along the axial direction. As is well known to those skilled in the art, the end surface 106 may be planar or curved, or regular or irregular. The cutting portion 131 is provided on one side of the end surface 106, but the cutting portion 131 may be provided on both sides of the end surface 106.

Specifically, the cutting portion 131 includes a surface 132, and in the preferred embodiment, the surface 132 is an outer axial end surface of the tool bit body 113 and is located between the two symmetrical end surfaces 106. The surface 132 is provided with at least two rows of teeth 102. Three, four, or more rows of serrations 102 may also be provided on the surface 132, as is well known to those skilled in the art. Each row of sawtooth rows 102 is formed by arranging a row of sawteeth 103 along the axial direction X of the cutter head body 113, the cutting direction of the sawteeth 103 is parallel to the axial direction X of the cutter head body 113, the sawtooth rows 102 are arranged side by side at intervals, and a cooling channel 133 is arranged between the adjacent sawtooth rows 102. In the preferred embodiment, the cooling channels 133 are located between the roots 109 of the adjacent rows of teeth 102.

As shown in fig. 2, the cooling channel 133 may be located above the surface 132, or may be a channel (not shown) recessed within the surface (132) to ensure that cooling water flowing from the proximal end passes through and extends to the distal end thereof. In the present invention, the cooling channel 133 is disposed between the saw teeth rows 102 and substantially located in the middle of the surface 132, so as to avoid the ultrasonic cavitation of the saw teeth and flow to the tip of the distal tool bit; and when the tip of the saw tooth is completely embedded inside the tissue, a sufficient amount of cooling fluid may still be delivered to the saw tooth.

Preferably, the cooling channel 133 has a uniform entire width in the axial direction thereof. The depth of the cooling channels 133 may be uniform or may be gradual, increasing from the near to the far. Therefore, the cavitation effect of the ultrasonic can be better utilized, the cooling liquid is more effectively transmitted to the front end of the sawtooth, and the cooling effect is improved.

As shown in fig. 3 and 4, in the preferred embodiment, the blade 101 has a circular arc projection along the thickness direction of the ultrasonic osteotome knife and a triangular projection 110 along the width direction of the ultrasonic osteotome knife. The knife edge 101 is in semicircular structural design along the thickness direction, the structure is smooth, when the knife edge is in contact with fragile tissues such as blood vessels and nerves, the fragile tissues cannot be scratched, the fragile tissues can be pushed away under the action of ultrasound, and the heat effect can be reduced by matching with enough cooling water, so that a good protection effect can be generated on the tissues. The cutting tool is designed to be triangular along the width direction, the tip part can be provided with a small plane or a circular arc surface, and when the cutting tool contacts cancellous bone and thinner cortical bone, the sharp top at an acute angle can cut the tissues more effectively.

Of course, the shape of the blade 101 may be other forms, such as a semi-circular blunt blade in the ninth embodiment shown in fig. 19. Therefore, when the ultrasonic wave generated by the ultrasonic generator is transmitted to the blade, a stronger driving-away effect is generated, fragile tissues such as blood vessels and nerves are protected, the fragile tissues are not easily scratched, and a good protection effect can be generated on the tissues. Of course, it will be appreciated by those skilled in the art that the cutting edge 101 of the bit body 113 may be in other forms, such as: the shape of the cutting edge 101 is an extension of the teeth of the row of teeth 102 or a tooth in the form of a regular triangle as is known per se.

The other structures of the blade body 113 of the present invention may be based on the shape of the blade 101.

The two side ends of the semicircular arc top of the blade 101 are respectively provided with a tooth tip, and the tooth tips are formed by intersecting two arc sections to form a first tooth tip 114. The first tooth point 114 is formed by combining a tip outer circle R3mm and an inner circle R1.5mm, a tangent line is made along the tooth point, the tooth belongs to a negative rake angle of-15 degrees, the whole cutting edge 101 is ensured to belong to a tip surface which is cut as an auxiliary part and is mainly safe, the requirement on the operation precision of a doctor in the operation is reduced, and important tissues are protected better.

The saw tooth rows 102 are two rows in parallel, each row 102 is formed by arranging one row 103 of saw teeth, and in the preferred embodiment, the saw teeth 103 of the two rows 102 are identical.

In the preferred embodiment, the tips 104 of two adjacent rows of teeth 102 are oriented in the same direction, which increases the cutting force in the forward direction.

For the sawtooth 103, its motion trajectory is ideally simple harmonic, starting from the equilibrium position zero as shown in fig. 5, and for the positive half cycle, the tip of the tooth travels towards the distal end of the cutter head; for the negative half-cycle, travel is toward the proximal end of the blade. In order to ensure that the cutting head has a similar cutting effect in both the positive and negative halves, the teeth tips 104, 105 of two adjacent rows of said rows 102 are oriented in opposite directions, as shown in fig. 6 and 7 according to the second embodiment of the present invention. It is well known to those skilled in the art that when the rows of saw teeth 102 are formed in multiple rows, the orientations of the teeth 104 of the rows of saw teeth 102 can be selectively arranged and combined, and the orientations of the teeth 104 of the same rows of saw teeth 102 can also be arranged and combined, and these equivalent changes without changing the technical purpose are all within the scope of the present invention.

For a sawtooth shape, there are three important parameters, respectively:

γ: rake angle 122, the angle of the cutting rake face from the vertical plane;

α: a relief angle 120, the angle of the cutting face to the horizontal;

beta: cusp 121, the rake face and the relief face form an angle.

Three tooth forms shown in fig. 8 are a standard tooth 117 (with a rake angle of 0 °), a blunt tooth 118 (with a rake angle of-15 °), and a hook tooth 119 (with a rake angle of +15 °). The conventional saw tooth has an isosceles triangle tooth shape and is a blunt tooth 118, and the rake angle γ has a negative value and belongs to a blunt tooth. Although the same effect is achieved in both the positive and negative half cycles of movement; but the disadvantages are also equally evident, and the cutting efficiency is insufficient.

With particular reference to fig. 8, the cutting force experienced by the tool during the cutting run is analyzed. It can be seen that the cutting force of the blunt tooth 118 is greatest and the cutting force of the hook tooth 119 is least, but the blunt tooth has a greater force Fz away from the cutting face, while the hook tooth force Fz away from the cutting face is negative. The conventional isosceles triangle saw teeth generate large advancing cutting force in the use process, but the cutter head is easy to bounce off in the cutting process, and enough pressing force is needed to stabilize the cutter head. In the present invention, the hook tooth 119 is adopted, that is, the rake angle γ 122 of the sawtooth 103 is a positive rake angle. Although the advancing cutting force is only about 68% of that of the blunt tooth, the obvious cutting effect is better for the load with the same difficulty; and the force Fz deviating from the cutting surface is a negative value, which indicates that the cutter head can be well coupled with the load in the cutting process, and an operator only needs to hold the cutter to cut, thereby improving the comfort degree in the use process.

In order to determine the angle of the positive rake angle, as shown in fig. 9, the present invention uniformly sets 7 kinds of angles of the positive rake angle from 0 degree to 30 degrees, respectively, and it was found that as the positive rake angle increases, the advancing cutting force gradually decreases, and a negative pressing force Fz begins to appear at 10 °. And the cutting force is gradually reduced along with the increase of the rake angle. And then carrying out modal analysis on the 7 groups of tooth-shaped cutter heads, analyzing and counting the numerical value of the maximum stress at the designed working frequency, wherein the whole stress change is smaller, but the stress value can also be seen to firstly fall and then rise along with the increase of the front angle, and the stress value is the minimum value in the vicinity of 10-20 degrees. Subsequently, the positive rake angle increases and the maximum stress gradually increases. In addition, the increase of the positive rake angle inevitably causes the reduction of the tooth tip angle, the strength of the cutting tooth tip is reduced, and the cutting fatigue is more likely to occur to cause the tooth tip fracture. In view of the above, a positive rake angle design between 10 ° and 20 ° is suitable, and the present invention is preferably used with a positive rake angle γ 122 of 15 °.

As shown in fig. 10, according to the shape of the back of the tooth, there are generally straight back teeth 123 and tortoise back teeth 124, and the present invention adopts the tortoise back teeth 124. Because the back of the turtle tooth can have narrower tooth width under the premise of the same front and back angles, the design of the strength of the tooth tip and the tooth space has obvious advantages. Modeling analysis was performed by the same method as above, we analyzed the magnitude of the clearance angle, set 7 kinds of clearance angle parameters uniformly from 0 ° to 30 ° respectively (neglecting the friction effect of the back and the load), analyzed the cutting force, and we found that the advancing cutting force tends to increase weakly as the clearance angle increases. From the viewpoint of cutting force only, the smaller the clearance angle, the better. However, the smaller the relief angle, the easier the tooth back comes into contact with the remaining loaded tissue, increasing resistance and frictional heating; in terms of shape, the smaller the clearance angle, the larger the tooth pitch, the smaller the number of teeth that can be placed per unit distance, and the cutting effect is reduced. Taken together, the preferred relief angle in the present invention is 20 ° ± 10 °. The tip angle β 121 of the serration 103 is not less than 45 °. The preferred cusp angle beta 121 of the utility model is 55 degrees.

As shown in fig. 11, the turtleback teeth designed with a positive rake angle of 15 ° and a back angle of 20 ° in combination with fig. 2 have a gap 134 between adjacent saw teeth 103 of the same row 102 for easier forming. The cooling passage 133 communicates with the gap 134.

In the embodiment of the utility model, the root fillet R0.25, the tooth height 0.6mm, the shortest tooth spacing is 1.05 mm. On the premise of ensuring that the total cutting length is equivalent as much as possible, the cutting length is determined according to the tooth spacing 125 x the tooth number 126: four different tooth spacings were designed 1.1mm × 13, 1.3mm × 11, 1.5mm × 10, 1.7mm × 8. On the premise of keeping the total length unchanged, 1.3mm to 1.7mm is a reasonable selection interval, wherein the 1.5mm tooth space is a better value.

The utility model discloses the double reverse overall arrangement (be two promptly) of second embodiment the orientation of the prong 104 of sawtooth row 102, 105 is opposite colludes tooth structural design, guarantees all to have sufficient cutting force in the whole cycle to hard tissue 127 cutting, through the simulation analysis, the utility model discloses a structure can be under the prerequisite that does not increase the stress value improvement cutting efficiency doubly.

Another problem encountered in the ultrasonic bone cutting process is that when a bone having a large cross section and a thick tissue is broken, the bone cutting head is inevitably buried in the bone for a long time. The cutting ultrasonic osteotomes that are mainstream at present are all sheet-shaped structures, and have two end faces 106 with large area in the thickness direction. When the blade is embedded into the tissue, the planar structure can make long-time contact with the resected plane, and a large amount of heat can be generated under the action of ultrasound, so that the secondary temperature rise of the cut wound surface is easily caused to influence the bone healing. And the ultrasonic generator is required to output more energy, and the energy acts on the invalid output, so that higher requirements are put on the output power of hardware. To solve this problem, a third embodiment of the present invention shown in fig. 12 differs from the first embodiment in that: a groove 107 is formed in each end surface 106. In this embodiment, the grooves 107 are shown as racetrack shaped, with the depth of the single-sided grooves being no more than 25% of the total thickness, leaving substantially more than 50% of the total thickness in between, and retaining sufficient mechanical strength. The total length of the groove is greater than the total length of the cutting teeth. This can reduce the contact area. Fig. 13 shows a fourth embodiment of the present invention, on the basis of the tooth hooking structure of the double-row reverse layout of the second embodiment, a groove 107 is formed on each of the end surfaces 106.

A fifth embodiment of the present invention, as disclosed in fig. 14 and 15, is different from the preferred embodiment in that one side of the bit body 113 is provided with the row of saw teeth 102 extending along the body axis, and the other side of the symmetry is provided with the cutting edge 108. Thus, the operator can selectively choose the sawtooth row 102 or the cutting edge 108 to cut, and the use scene of the utility model is enlarged.

A sixth embodiment of the invention, as disclosed in fig. 16, differs from the fifth embodiment in that the teeth tips 104, 105 of the two rows of teeth 102 are oriented in opposite directions.

In the seventh and eighth embodiments of the present invention disclosed in fig. 17 and 18, the groove 107 on the end surface 106 is added as compared with the fifth and sixth embodiments. The effect is similar to that of the second embodiment, and is not described herein again.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (14)

1. Ultrasonic scalpel tool bit, its characterized in that: including tool bit body (113) that is the platykurtic structure, terminal surface (106) that have two symmetries respectively in thickness direction, at least one side of terminal surface (106) is provided with cutting part (131) along its axial, cutting part (131) include one surface (132), be provided with on surface (132) at least two sawtooth rows (102), every sawtooth row (102) are followed by a sawtooth (103) the axial arrangement of tool bit body (113) forms, the cutting direction of sawtooth (103) with the axial direction parallel of tool bit body (113), sawtooth row (102) set up side by side at interval each other, and is adjacent cooling channel (133) have between sawtooth row (102).

2. The ultrasonic surgical blade cartridge of claim 1, wherein: the cooling channels (133) are located between the roots (109) of the adjacent rows of serrations (102).

3. The ultrasonic surgical blade cartridge of claim 1, wherein: the surface (132) is a cutting portion axial end surface of the tool bit body (113) and is located between the two symmetrical end surfaces (106), and the cooling channel (133) is located above the surface (132).

4. The ultrasonic surgical blade cartridge of claim 1, wherein: the surface (132) is a cutting portion axial end surface of the tool bit body (113) between the two symmetrical end surfaces (106), and the cooling channel (133) is a channel recessed within the surface (132).

5. The ultrasonic surgical blade cartridge of claim 4, wherein: the cooling channels (133) have a uniform depth or taper from near to far.

6. The ultrasonic surgical blade cartridge of claim 1, wherein: the cooling channel (133) has a uniform overall width in the axial direction thereof.

7. The ultrasonic surgical blade cartridge of claim 1, wherein: the tooth tips (104, 105) of two adjacent rows of the saw teeth (102) are in the same or opposite orientation.

8. The ultrasonic surgical blade cartridge of claim 1, wherein: the blade (101) at the farthest end of the cutter head body (113) is at least one of a cutting edge blade, a blunt edge blade or a sawtooth edge blade.

9. The ultrasonic surgical blade cartridge of claim 1, wherein: the rake angle gamma (122) of the saw teeth (103) is a positive rake angle, and the rake angle beta (121) is not less than 45 degrees.

10. The ultrasonic surgical blade cartridge of claim 9, wherein: the front angle gamma (122) of the saw tooth (103) is 15 degrees +/-5 degrees, and the rear angle alpha (120) is 20 degrees +/-10 degrees.

11. The ultrasonic surgical blade cartridge of claim 1, wherein: the sawteeth (103) are turtle-back teeth, gaps (134) are formed between every two adjacent sawteeth (103) of the same sawteeth row (102), and the cooling channel (133) is communicated with the gaps (134).

12. The ultrasonic surgical blade cartridge of claim 1, wherein: at least one end surface (106) of the tool bit body (113) is provided with a groove (107).

13. The ultrasonic-surgical-blade cartridge of any one of claims 1 to 12, wherein: the tool bit body (113) comprises a blade (101) positioned at the farthest end and two sawtooth rows (102) which are symmetrically arranged on the two sides of the blade and extend along the axis of the tool bit body.

14. The ultrasonic-surgical-blade cartridge of any one of claims 1 to 12, wherein: the bit body (113) includes a blade (101) at the distal-most end and a row of serrations (102) extending along the body axis on one side thereof, and a cutting edge (108) on the other side thereof that is symmetrical.

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