CN113520530A

Movatterモバイル変換

Info

Publication number: CN113520530A
Application number: CN202110750075.1A
Authority: CN
Inventors: 齐世龙; 莫易凡
Original assignee: Changsha Kaqiusha Medical Technology Co ltd
Current assignee: Katyusha Xiamen Medical Technology Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-10-22

Abstract

Translated fromChinese

本发明为一种超声切割止血刀用刀杆。其主体为刀杆，所述刀杆分为替换部和固定部，所述替换部和固定部为拆合连接。较之前技术而言，本发明的有益效果为：(1)刀杆的替换部和固定部为拆分结构，能够分开生产，结构简单，制造方便，适合大批量生产；(2)刀杆的替换部为一次性使用，刀头的其它部件能够重复消毒使用，减少医患负担；(3)刀杆的替换部和固定部为拆分结构，能够提高术中的灵活更换。

The present invention is a cutter bar for ultrasonic cutting hemostatic knife. The main body is a cutter bar, and the cutter bar is divided into a replacement part and a fixed part, and the replacement part and the fixed part are disassembled and connected. Compared with the prior art, the beneficial effects of the present invention are: (1) the replacement part and the fixed part of the tool bar are split structures, which can be produced separately, with simple structure, convenient manufacturing, and suitable for mass production; The replacement part is for one-time use, and other parts of the cutter head can be repeatedly sterilized and used to reduce the burden on doctors and patients; (3) The replacement part and the fixed part of the cutter bar are split structures, which can improve the flexible replacement during surgery.

Description

Cutter bar for ultrasonic cutting hemostatic cutter

Technical Field

The invention relates to the field of medical instruments, in particular to a cutter bar for an ultrasonic cutting hemostatic cutter.

Background

Ultrasonic surgical devices are capable of performing cutting of tissue and achieving hemostasis by coagulation, thereby completing the cut and sealing of the tissue, advantageously minimizing patient trauma. An ultrasonic surgical device includes an ultrasonic transducer and a tool bit coupled to the ultrasonic transducer, the instrument bit including a distally mounted end effector that can clamp tissue. The end effector is typically coupled to the handle and/or the robotic surgical tool via a knife bar. The blade is acoustically coupled to the transducer via a waveguide extending through the shaft. Ultrasonic surgical devices of this nature can be used for open surgical applications, laparoscopic or endoscopic surgical procedures, including robotic-assisted procedures.

In the prior art, a cutter bar of an ultrasonic cutting hemostatic cutter is generally formed by numerical control machining, and even a bending process is added; in order to meet the coaxiality and performance requirements, multiple clamping is needed, the production efficiency is low, the capacity is limited, and the manufacturing cost is high.

The existing tool bit has the following defects:

1. the curvature of the elbow part of the cutter bar is large, the cutter bar comprises fine features, the processing consistency is poor, and the amplitude output difference is obvious. Meanwhile, due to the problems of materials or processing technology, the operation is easily interrupted, most of the fracture positions are generated at the bent part of the head of the cutter rod, and the cutter rod cannot be reused, so that waste is caused.

2. The machining time is long, the rejection rate is high, and the production cost is high;

3. the cutter head is required to be used once because of difficult disinfection, so that the use cost is increased; the cutter head component mainly comprises a cutter bar, a damping sleeve, an inner/outer sleeve, a supporting spring component and a tong head. At present, four positions of the cutter head are mainly used in places which are difficult to realize effective sterilization, and the four positions are respectively as follows: 1, covering a cutter bar by a damping sleeve; 2, the inner sleeve cutter bar; 3, covering the inner sleeve by the outer sleeve; 4 at the forceps head.

Disclosure of Invention

The invention aims to: provided is a cutter bar for an ultrasonic cutting hemostatic cutter, which can realize component replacement.

The invention is realized by the following technical scheme: ultrasonic cutting is cutter arbor for hemostatic scalpel, its main part is cutter arbor 1, cutter arbor 1 is divided intoreplacement part 11 and fixedpart 12,replacement part 11 and fixedpart 12 are for the connection of breaking open and shutting.

Compared with the prior art, the invention has the beneficial effects that:

(1) the replacement part and the fixing part of the cutter bar are of split structures, so that the cutter bar can be produced separately, has a simple structure, is convenient to manufacture and is suitable for mass production;

(2) the replaceable part of the cutter bar is disposable, and other parts of the cutter head can be repeatedly sterilized and used, so that the burden of doctors and patients is reduced;

(3) the replacement part and the fixing part of the cutter bar are of split structures, so that flexible replacement in the operation can be improved.

(4) The material requirement of the fixing part is reduced, the fixing part can be made of other materials with lower cost, and the production cost of the whole product can be reduced.

Drawings

FIG. 1 is a side cross-sectional view of an alternate and fixed portion embodiment 1;

FIG. 2 is a side sectional view of an alternative construction of the replacement part and the fixing part in embodiment 1;

FIG. 3 is a side cross-sectional view of alternate and fixedportion embodiment 2;

FIG. 4 is a schematic structural view of an embodiment 5 of a replacement part and a fixing part;

FIG. 5 is a schematic structural view of a replacement part and a fixing part with grooves;

FIG. 6 is a schematic structural view of example 7 of the encapsulating portion;

FIG. 7 is a combined effect diagram of FIG. 6;

FIG. 8 is a schematic structural view of example 8 of the encapsulating portion;

FIG. 9 is a combined effect diagram of FIG. 8;

FIG. 10 is a schematic structural view of example 9 of the encapsulated portion;

FIG. 11 is a combined effect diagram of FIG. 10;

FIG. 12 is a structural diagram of the resonance amplitude of the tool bar.

Description of reference numerals: 1-cutter bar, 11-replacement part, 111-bent bar B, 112-straight bar B, 12-fixing part, 121-straight bar A, 13-external thread section, 14-screw, 15-groove, 2-rubber coating, 21-bent bar rubber coating, 22-straight bar rubber coating, 23-hook rubber coating, 24-protrusion rubber coating, 25-tooth rubber coating A and 26-tooth rubber coating B.

Detailed Description

The invention is described in detail below with reference to the following description of the drawings:

as shown in fig. 1-12: ultrasonic cutting is cutter arbor for hemostatic scalpel, its main part is cutter arbor 1, cutter arbor 1 is divided intoreplacement part 11 and fixedpart 12, the near-end and the ultrasonic cutting hemostatic scalpel of fixed part are connected,replacement part 11 and fixedpart 12 are for the connection of breaking open and shutting.

Depending on the kind of the detachable structure of thereplaceable part 11 and thefixing part 12, the following embodiments can be derived:

example 1

As shown in fig. 1 and 2: the proximal end of the replacingpart 11 is provided with anexternal thread section 13, and the distal end of thefixing part 12 is provided with a threaded hole matched with theexternal thread section 13.

The two adopt the matched thread specifications to ensure the effective screwing (figure 1); in practice, it is contemplated that a threaded bore may be provided at the proximal end of thedisplacement portion 11 and the male threadedsection 13 may be provided at the distal end of the fixation portion 12 (FIG. 2).

Example 2

As shown in fig. 3: the invention also comprises ascrew 14, a bent rod threaded hole is arranged at the near end of the replacingpart 11, and a straight rod threaded hole is arranged at the near far end of thefixing part 12.

Example 3

Thereplacement part 11 and thefixing part 12 are connected by adopting an adhesive. The adhesive can be medical quick-drying adhesive, metal adhesive, fastening adhesive or epoxy resin and the like.

The following embodiments can be derived from the shape of the anchoring portion and the replacement portion:

example 4

On the basis of the embodiments 1 to 3, the fixed part is a straight rod A; thereplacement part 11 is a bent rod a. In this embodiment, it is equivalent to replacing only the elbow portion. (see FIGS. 1-3)

Example 5

As shown in fig. 4: on the basis of the embodiments 1 to 3, the fixed part is a straight rod A121; thereplacement part 11 comprises a bent rod B111 and a straight rod B112 fixedly connected to the proximal end of the bent rod B111. Here, a straight rod is arranged behind the elbow, and compared with the embodiment 4, the length of the straight rod a of the cutter bar with the same specification is relatively shorter.

Example 6

As shown in fig. 5: on the basis of embodiments 1 to 5, thereplacement part 11 and/or thefixing part 12 are provided with agroove 15 for clamping. Can be used as the clamping position of the dismounting device, and effectively avoids the slipping condition.

Further, an encapsulation is provided at the junction of thereplacement part 11 and thefixing part 12. The rubber coating is added here, which can play a role of supporting thereplacement part 11 and also play a role of sealing.

Depending on the type and structure of encapsulation, the following examples can be derived:

example 7

As shown in fig. 6 and 7: the rubber coating comprises a bentrod rubber coating 21 arranged at the near end of the replacingpart 11 and a straightrod rubber coating 22 arranged at the far end of the fixingpart 12, and the straightrod rubber coating 22 and the bentrod rubber coating 21 are symmetrical and can be connected with each other.

Example 8

As shown in fig. 8 and 9: the encapsulation comprises a hook-shapedencapsulation 23 at the proximal end of the displacingportion 11 and aprotrusion encapsulation 24 at the distal end of the fixingportion 12, the hook-shapedencapsulation 23 and theprotrusion encapsulation 24 cooperating with each other such that the displacingportion 11 and the fixingportion 12 are connected to each other.

Example 9

As shown in fig. 10 and 11: the rubber coating ring is arranged on a tooth-shaped rubber coating A25 at the near end of the replacingpart 11 and a tooth-shaped rubber coating B26 at the far end of the fixingpart 12, the tooth-shaped rubber coating A25 and the tooth-shaped rubber coating B26 are rotationally symmetrical, and the tooth-shaped rubber coating A25 and the tooth-shaped rubber coating B26 are matched and connected to enable the replacingpart 11 and the fixingpart 12 to be connected with each other.

Further, the cutter bar further comprises a damping rubber coating, and the rubber coating and the damping rubber coating are located at a node where an axial amplitude curve of the cutter bar intersects with a zero displacement datum line. The plane where the nodes are located has a point with zero displacement trend; the maximum amplitude occurs at the tip of the tool shaft. In addition, the optimum effect is that the joint between thereplaceable part 11 and thefixed part 12 is set at the node where the tool holder axial amplitude curve intersects the zero displacement reference line. The package clip at the joint is equivalent to shock absorption encapsulation.

As shown in fig. 12:

the resonance amplitude at any point on the tool holder can be represented as a sinusoid as follows:

Disp.＝A·sin(ω·t)

wherein: a is the zero-peak amplitude,ω 2 · pi · f, f is the resonance frequency, and t is the instantaneous time of vibration.

In the process of clamping tissues by the cutter head, the cutter rod bears radial bending moment, so that an elastic support needs to be arranged between the node and the inner sleeve to reduce attenuation in the ultrasonic conduction process and ensure that the front end support can also play a sealing role.

The encapsulation (shock absorbing encapsulation) is located at four zero displacement positions (I, II, III, IV) in fig. 12, where the amplitude is small and the loss of connection due to encapsulation is minimal, thus isolating the contact friction between the tool shank and the inner sleeve. The positions and the number of the rubber coating can be adjusted as required according to the length specification of the cutter rod.

Further, thereplacement part 11 can be manufactured by powder metallurgy, which mainly includes four processes of a conventional method, Metal Injection Molding (MIM), metal 3D printing (AM), and Isostatic Pressing (IP).

Take the metal 3Dprinting replacement part 11 as an example:

the metal 3D printing technology is a technology that utilizes metal powder to melt and solidify rapidly under the heat of a laser beam. In order to completely melt the metal powder, the laser energy density is required to exceed 10⁶W/cm². The currently used lasers mainly include Nd-YAG laser and Co₂Laser, fiber laser. The laser wavelengths generated by the lasers are 1064nm, 10640nm and 1090nm respectively. The metal powder has a high absorptivity to laser light of shorter wavelength such as 1064nm, and a low absorptivity to laser light of longer wavelength such as 10640 nm. Therefore, the laser energy utilization rate of the laser with the shorter wavelength is high in the process of forming the metal part, but the Co with the longer wavelength is adopted₂The laser has low laser energy utilization rate.

The metal 3D printing technology can completely melt metal powder under the action of high-energy laser, and the metal powder is metallurgically welded with base metal after heat dissipation and solidification, and then a desired three-dimensional entity is formed in an accumulation mode layer by layer. The surface roughness of the part which is usually formed is Ra4-5, the tensile strength is equivalent to that of a titanium material with corresponding dimension specification, and the grasping effect of an instrument on tissues can be improved; can also be polished to Ra0.4 or even 0.1 through post-treatment, so as to meet the requirements of conventional machining on the part; in addition, the forming direction and the direction perpendicular to the axis of the replacingpart 11 can be controlled to be subjected to layered material increase during printing, the transverse vibration component of the cutter bar during working can be effectively inhibited, the energy conversion efficiency and the effective amplitude output are improved, the fatigue stress and the heat during working are reduced, the service life is prolonged, and meanwhile, the cutter bar is suitable for mass production, the material utilization rate is improved, the waste loss is reduced, and the cost is reduced.

In a conventional 3D printing scheme, the additive directions are layered in a horizontal plane; and for thereplacement part 11, the axis thereof is the sound conduction direction; horizontal layering material increase, which can cause the material to be layered in the horizontal direction due to the printing and cooling sequence; in this embodiment, a normal plane perpendicular to the axis may be selected as the layered surface for material increase, and further, a suitable gradient material may be manufactured by adjusting the printing parameters according to the normal plane, so that acoustic parameters such as density and elastic modulus of the replacement portion are continuously transited, and the overall acoustic impedance is reduced; the fixed part has low stress level, simple structure and relaxed requirements on material consistency and stability, can select alternative domestic materials, reduces the dependence on imported materials and enlarges the material selection range.

The application range of the cutter bar comprises but is not limited to high-energy ultrasonic medical equipment such as an ultrasonic cutting hemostatic knife, an ultrasonic osteotome, an ultrasonic suction knife, an ultrasonic debridement knife, an ophthalmic super-breast needle and the like.

While the invention has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. It is understood, therefore, that the invention is not to be in any way limited except by the appended claims and their equivalents.

Claims

1. Ultrasonic cutting is cutter arbor for hemostatic knife, its main part is cutter arbor (1), its characterized in that: the utility model discloses a hemostatic scalpel, including cutter arbor (1), replacement portion (11) and fixed part (12), the near-end and the handle of ultrasonic cutting hemostatic scalpel of fixed part are connected, replacement portion (11) and fixed part (12) are for the closure connection.

2. The blade bar for an ultrasonic cutting hemostatic knife according to claim 1, wherein: the near end of the replacing part (11) is provided with an external thread section (13), and the far end of the fixing part (12) is provided with a threaded hole matched with the external thread section (13).

3. The blade bar for an ultrasonic cutting hemostatic knife according to claim 1, wherein: the novel medical device also comprises a screw (14), a bent rod threaded hole is formed in the near end of the replacing part (11), and a straight rod threaded hole is formed in the near-far end of the fixing part (12).

4. The blade bar for an ultrasonic cutting hemostatic knife according to claim 1, wherein: the replacement part (11) and the fixing part (12) are connected by adopting an adhesive.

5. The blade bar for an ultrasonic cutting hemostatic blade according to any one of claims 1 to 4, wherein: the fixed part (12) is a straight rod A (121), the replacing part (11) is a bent rod A, or the replacing part (11) comprises a bent rod B (111) and a straight rod B (112) fixedly connected to the near end of the bent rod B (111).

6. The blade bar for an ultrasonic cutting hemostatic blade according to any one of claims 1 to 4, wherein: the replacement part (11) and/or the fixing part (12) are/is provided with a groove (15) for clamping.

7. The blade bar for an ultrasonic cutting hemostatic blade according to any one of claims 1 to 4, wherein: and a rubber coating (2) is arranged at the joint of the replacing part (11) and the fixing part (12).

8. The blade bar for an ultrasonic cutting hemostatic knife according to claim 7, wherein: the rubber coating (2) comprises a bent rod rubber coating (21) arranged at the near end of the replacing part (11) and a straight rod rubber coating (22) arranged at the far end of the fixing part (12), and the straight rod rubber coating (22) and the bent rod rubber coating (21) are symmetrical to each other and can be connected with each other.

9. The blade bar for an ultrasonic cutting hemostatic knife according to claim 7, wherein: the rubber coating (2) comprises a rubber coating (2) and is characterized in that a hook-shaped rubber coating (23) is arranged at the near end of the replacing part (11) and a convex rubber coating (24) is arranged at the far end of the fixing part (12), and the hook-shaped rubber coating (23) and the convex rubber coating (24) are matched with each other to enable the replacing part (11) and the fixing part (12) to be connected with each other.

10. The blade bar for an ultrasonic cutting hemostatic knife according to claim 7, wherein: the rubber coating (2) is annularly arranged on a tooth-shaped rubber coating A (25) at the near end of the replacing part (11) and an annular tooth-shaped rubber coating B (26) at the far end of the fixing part (12), the tooth-shaped rubber coating A (25) and the tooth-shaped rubber coating B (26) are rotationally symmetrical, and the tooth-shaped rubber coating A (25) and the tooth-shaped rubber coating B (26) are matched and connected to enable the replacing part (11) and the fixing part (12) to be connected with each other.