Ultrasonic surgical instrument

Abstract

The invention discloses an ultrasonic surgical instrument, and relates to the technical field of medical instruments. In order to solve the problem that the hands of a doctor feel tired due to the fact that a chuck for clamping tissue is continuously, frequently and manually opened and closed through an existing ultrasonic knife, the following technical scheme is provided, the ultrasonic knife comprises an ultrasonic handle, a main machine and a pedal, the ultrasonic handle and the pedal are connected with the main machine through cables, and an ultrasonic knife head is arranged at the front end of the ultrasonic handle; a motor and an ultrasonic transducer are arranged in the ultrasonic handle, an ultrasonic emission source in the host converts power frequency alternating current into ultrasonic frequency signals to drive the ultrasonic transducer to generate ultrasonic waves, and the generated ultrasonic waves are transmitted to the ultrasonic scalpel head and enable the ultrasonic scalpel head to generate ultrasonic vibration; a chuck is arranged at the front end of the ultrasonic scalpel head, the motor drives and pulls the chuck to open and close, and the ultrasonic scalpel head automatically clamps target tissue. Manual intervention is not needed, the structure is simpler, manual operation of an operator is not needed, and physical strength and fatigue of the operator can be relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an ultrasonic surgical instrument. Background Art

[0002] Ultrasonic surgical devices are used in a variety of surgical applications due to their unique performance characteristics. Depending on the specific device configuration and operating parameters, ultrasonic surgical devices can perform transverse cutting of soft tissue and hemostasis by coagulation substantially simultaneously, thereby advantageously minimizing patient trauma. The ultrasonic surgical device includes an ultrasonic transducer positioned proximally and an instrument coupled to the ultrasonic transducer, the instrument having an end effector mounted distally, the end effector including an ultrasonic knife head for cutting and sealing tissue, the end effector is typically coupled to a handle and / or a robotic surgical tool via a shaft, and as minimally invasive surgery becomes more and more popular, smaller end effectors are needed. The knife is acoustically coupled to the transducer via a waveguide extending through the shaft. Ultrasonic surgical devices with this property can be used for open surgical applications, laparoscopic or endoscopic surgeries, including robot-assisted surgeries.

[0003] When a traditional ultrasonic knife is in use, the surgeon needs to continuously and frequently manually open and close the chuck for clamping tissue during the operation, which can cause fatigue in the surgeon's hand. In addition, the diameter at the knife head is large, making it difficult to be used in fine surgical situations, and it is prone to large displacement and heat generation during vibration, affecting the service life of the ultrasonic knife. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultrasonic surgical instrument to solve the problem that the continuous and frequent manual opening and closing of the chuck for clamping tissue of the existing ultrasonic knife can cause fatigue in the surgeon's hand.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: An ultrasonic surgical instrument includes: an ultrasonic handle, a main body, and a foot pedal. The ultrasonic handle and the foot pedal are respectively connected to the main body through cables, and an ultrasonic knife head is provided at the front end of the ultrasonic handle; A motor and an ultrasonic transducer are provided inside the ultrasonic handle. The ultrasonic emission source in the main body converts industrial frequency alternating current into an ultrasonic frequency signal to drive the ultrasonic transducer to generate ultrasonic waves. The generated ultrasonic waves are transmitted to the ultrasonic knife head and cause the ultrasonic knife head to vibrate ultrasonically. A chuck is provided at the front end of the ultrasonic knife head, and the motor drives to pull the chuck to open and close, realizing automatic clamping of the target tissue by the ultrasonic knife head.

[0006] Further, the ultrasonic handle includes an ultrasonic waveguide rod, and a chuck is provided at the zero displacement node of the ultrasonic waveguide rod.

[0007] Further, a knife head is provided at the front end of the ultrasonic waveguide rod, and the end of the chuck is rotatably installed at the zero displacement node at the front end of the ultrasonic waveguide rod.

[0008] Furthermore, the rear end of the ultrasonic guide rod is connected to the horn through a screw, and a sleeve is sleeved outside the ultrasonic guide rod.

[0009] Furthermore, a flange is provided inside the ultrasonic handle, and the flange is used to support the horn.

[0010] Furthermore, a transmission assembly is provided at the output end of the motor, and the motor drives the traction chuck through the transmission assembly.

[0011] Furthermore, the transmission assembly is divided into two groups. Each group of the transmission assembly includes a transmission rope and pulleys respectively arranged at the front and rear ends of the ultrasonic handle. The output shaft of the motor is connected to the pulley through the transmission rope.

[0012] Furthermore, a housing is provided outside the ultrasonic handle, and two grooves for placing the transmission ropes are symmetrically arranged on the inner wall of the housing and the outer wall of the sleeve respectively. Anti-slip materials are provided on the housing.

[0013] Furthermore, the zero-displacement node of the ultrasonic guide rod is obtained by performing finite element frequency simulation analysis on the ultrasonic guide rod.

[0014] The present invention has the following beneficial effects: The present invention uses the finite element simulation method to determine the zero-displacement node of the ultrasonic guide rod, punches holes at the zero-displacement of its wave node, installs a rotating shaft in the hole to fix the chuck, and further realizes the opening and closing of the chuck by the motor pulling the rope; and by the way of introducing electric power to pull the chuck of the ultrasonic tool head through the rotation of the motor and the cooperation of the metal rope and the pulley transmission, manual intervention is not required, the structure is more concise, and there is no need for the operator to manually operate, which is beneficial to reducing the physical strength of the operator and relieving fatigue.

[0015] The diameter of the improved tool head of the present invention is small, and the overall size is also reduced. It can be used in fine surgical occasions, and the chuck fixing part will not generate friction heat or break due to vibration, thus prolonging the service life of the tool head. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the ultrasonic surgical instrument; Figure 2 It is a schematic diagram of the internal structure of the ultrasonic handle and the ultrasonic tool head; Figure 3 It is a schematic diagram of the internal structure of the ultrasonic handle; Figure 4 It is a schematic diagram of the ultrasonic tool head structure; Figures 1 to 4The reference numerals shown in the figures are respectively represented as: ultrasonic handle 1, motor 11, transmission assembly 12, transmission cable 121, pulley 122, ultrasonic transducer 13, horn 14, ultrasonic waveguide rod 15, flange 16, housing 17, ultrasonic knife head 2, chuck 21, knife head 22, pin 23, sleeve 24, main unit 3, foot pedal 4, cable 5, cable connector 51. Detailed implementation manners

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0018] Please refer to Figures 1 - 2 , the present invention provides an ultrasonic surgical instrument, aiming to improve the convenience and accuracy of surgical operations through an automated structural design, and is particularly suitable for delicate minimally invasive surgeries. The following are the detailed implementation manners of the present invention, which elaborate on its structural composition, working principle and application scenarios.

[0019] First of all, the ultrasonic surgical instrument described in the present invention mainly consists of a main unit 3, a foot pedal 4, an ultrasonic handle 1 and an ultrasonic knife head 2 provided at the front end of the ultrasonic handle 1. The main unit 3, as the control core, is responsible for the normal operation of the entire device, including the generation and transmission of ultrasonic signals, as well as the control of the motor 11. The foot pedal 4, as a switch device, is connected to the main unit 3 through a cable, allowing the surgeon to conveniently control the start and stop of the device during the operation. The ultrasonic handle 1 is the main tool for surgical operations, integrating key components such as a motor 11, a transmission assembly 12, an ultrasonic transducer 13, a horn 14 and a waveguide rod 15, and is connected to the main unit 3 through a cable to achieve signal transmission and energy supply.

[0020] Referring to Figures 2 - 3 , the structural design of the ultrasonic handle 1 is particularly crucial. The motor 11 provided inside it, as the power source, is responsible for driving the transmission assembly 12 to achieve the opening and closing actions of the chuck 21. The transmission assembly 12 consists of two groups of metal transmission cables 121 and pulleys 122 respectively arranged at the front and rear ends of the ultrasonic handle 1. Each group of transmission assemblies works independently, controlling both sides of the chuck 21 respectively to ensure smooth and accurate actions. The output shaft of the motor 11 is connected to the pulley 122 through the metal transmission cable 121 to form a power transmission path. When the motor 11 rotates, the positive and negative torque generated by it is transmitted to the chuck 21 through the commutation of the metal transmission cable 121 and the pulley 122, realizing its opening and closing.

[0021] The ultrasonic transducer 13 is a key component for ultrasonic signal conversion. Under the excitation of the ultrasonic emission source in the main unit 3, the ultrasonic transducer 13 converts the industrial-frequency alternating current into an ultrasonic-frequency signal, and then generates ultrasonic waves. These ultrasonic waves are amplified by the horn 14 and then transmitted to the ultrasonic waveguide rod 15, and finally reach the ultrasonic knife head 2. As the transmission channel for ultrasonic waves, the design of the ultrasonic waveguide rod 15 needs to ensure the efficient transmission and energy concentration of ultrasonic waves. To achieve this goal, the length, diameter, and material of the ultrasonic waveguide rod 15 need to be precisely calculated and optimized.

[0022] Refer to Figure 4 , to ensure that the size of the ultrasonic knife head 2 is as small as possible and not prone to heat generation, the present invention adopts a special installation method. Specifically, the end of the tool head 22 and its chuck 21 are installed at the zero-displacement node of the ultrasonic waveguide rod 15. The zero-displacement node refers to the point on the ultrasonic waveguide rod 15 where the displacement is zero at the operating frequency of the ultrasonic transducer 13. By means of the finite element simulation method, a model of the ultrasonic waveguide rod 15 is constructed in the simulation software COMSOL, and the displacement of the ultrasonic waveguide rod 15 at the operating frequency of the ultrasonic transducer 13 is simulated and analyzed. On the extracted axial position-displacement curve graph, the position of the zero-displacement node is the actual position of the zero-displacement ultrasonic node. A hole is drilled at the corresponding position at the front end of the ultrasonic waveguide rod 15, a pin 23 is placed into the hole, and the chuck 21 is fixed to the pin 23 so that it can rotate around the pin 23. This installation method not only simplifies the structure but also effectively utilizes the zero-displacement characteristic at the ultrasonic node, avoiding the vibration and heat generation problems of the chuck 21 and the pin 23 in the excited state, thereby improving the energy transmission efficiency and prolonging the service life of the tool head 22.

[0023] The rear end of the ultrasonic waveguide rod 15 is connected to the horn 14 through a screw and a sleeve 24 is sleeved outside it. The horn 14 is stably connected to the ultrasonic transducer 13 through the support of the flange 16 provided in the ultrasonic handle 1. The setting of the flange 16 not only enhances the structural stability but also provides a reliable fulcrum for the support of the horn 14. The symmetrically arranged grooves on the side walls of the outer shell 17 and the sleeve 24 are used to lay the transmission rope 121, ensuring the clarity and smoothness of the transmission path. In addition, the gap between the sleeve 24 and the ultrasonic waveguide rod 15 can also play a role in heat dissipation, further reducing the risk of heat generation.

[0024] The outside of the ultrasonic handle 1 is provided with an outer shell 17, which not only protects the internal components from external environmental interference and damage but also provides a comfortable gripping feel for the operator. The anti-slip materials, such as rubber or silica gel, provided on the outer shell 17 effectively prevent operation errors caused by hand sweat or glove slippage during the operation.

[0025] During the operation, the operator first needs to connect the cable connector of the ultrasonic handle 1 to the output interface of the main unit 3 and connect the power cable of the main unit 3 to ensure the normal operation of the device. At the same time, connect the switch cable of the foot pedal 4 to the corresponding interface on the main unit 3 to control the start and stop of the device through the foot switch. After the connection is completed, turn on the power switch of the main unit 3, set relevant parameters such as ultrasonic frequency and output power through the touch display screen, and perform the initialization of the device.

[0026] When a soft tissue surgical operation is required, the operator steps on the switch of the foot pedal 4 to start the device. Subsequently, the ultrasonic handle 1 can be held by hand or installed on the robotic arm of the surgical robot, and the ultrasonic knife head 2 is applied to the soft tissue to be treated of the patient. By clicking the control button on the display screen of the main unit 3 or selecting the built-in treatment program, the rotation of the motor 11 can be controlled, so as to drive the transmission component 12 to realize the automatic opening and closing of the chuck 21. After the chuck 21 is opened, the target tissue can be clamped; when it is closed, the tissue can be fixed. After clamping the tissue, the ultrasonic knife head 2 starts to work, and uses its mechanical action of ultrasonic vibration to realize operations such as cutting of soft tissue and closing of blood vessels. During the operation, the operator can adjust the opening and closing state of the chuck 21 and the working parameters of the ultrasonic knife head 2 at any time according to the needs until the desired surgical effect is achieved.

[0027] The following is a further description of the present invention in specific application scenarios: In a liver resection operation, the operator needs to install the ultrasonic handle 1 on the robotic arm of the surgical robot to achieve more precise and stable operation. After determining the surgical path and resection range through preoperative planning, the operator controls the robotic arm to drive the ultrasonic handle 1 to move to the surgical area through the console. After stepping on the foot pedal 4 switch to start the device, adjust the opening and closing state of the chuck 21 through the control button on the display screen, and clamp the liver tissue to be resected. Subsequently, adjust the working parameters of the ultrasonic knife head 2 to an appropriate range and start the cutting operation. During the cutting process, the ultrasonic vibration of the ultrasonic knife head 2 can quickly cut off the tissue and seal the blood vessels, reducing the risk of bleeding. At the same time, the stable control of the robotic arm ensures the accuracy and safety of the surgical operation.

[0028] In neurosurgery, due to the narrow surgical area and complex surrounding structures, high precision and flexibility of surgical instruments are required. The ultrasonic surgical instrument provided by the present invention effectively improves its operation flexibility and precision in a narrow space by reducing the size of the knife head and using a zero-displacement node to install the chuck. The surgeon can hold the ultrasonic handle 1 by hand or guide the handle to the surgical area through a surgical navigation system. After precisely controlling the opening and closing state of the chuck 21 on the display screen, the nerve tissue to be treated is clamped. Subsequently, the cutting or peeling operation is performed using the ultrasonic vibration of the ultrasonic knife head 2. Since neither the chuck nor the knife head will heat up or cause additional losses due to vibration, efficient energy transmission and tissue protection during the surgical process can be ensured.

[0029] In addition, in surgeries of superficial tissues such as breast surgery and thyroid surgery, the present invention also has significant advantages. The surgeon can directly operate by holding the ultrasonic handle 1 by hand or install it on a surgical stent for more stable operation. By precisely controlling the opening and closing state of the chuck 21 and the working parameters of the ultrasonic knife head 2, precise cutting and blood vessel sealing operations on superficial tissues can be achieved. At the same time, since there is no need to frequently replace instruments or adjust parameters during the surgical process, the surgical efficiency can be significantly improved and the physical burden on the surgeon can be reduced.

[0030] In summary, the ultrasonic surgical instrument provided by the present invention realizes the automatic control of the chuck and the knife head and efficient energy transmission by integrating key components such as a motor drive, a transmission component, and an ultrasonic transducer. It has a compact structure, is easy to operate, and is applicable to various surgical scenarios, providing a safer, more precise, and efficient surgical tool for surgeons. At the same time, by reducing the size of the knife head and using a zero-displacement node to install the chuck, the present invention further improves the operation flexibility and precision of the surgical instrument in a narrow space, providing a strong guarantee for the successful implementation of complex surgeries.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An ultrasonic surgical instrument, characterized in that, Including: An ultrasonic handle (1), a main unit (3), and a foot pedal (4). The ultrasonic handle (1) and the foot pedal (4) are respectively connected to the main unit (3) through cables. An ultrasonic cutter head (2) is provided at the front end of the ultrasonic handle (1). A motor (11) and an ultrasonic transducer (13) are provided inside the ultrasonic handle (1). The ultrasonic emission source in the main unit (3) converts industrial frequency alternating current into an ultrasonic frequency signal to drive the ultrasonic transducer (13) to generate ultrasonic waves. The generated ultrasonic waves are transmitted to the ultrasonic cutter head (2) and cause the ultrasonic cutter head (2) to perform ultrasonic vibration. A chuck (21) is provided at the front end of the ultrasonic cutter head (2). The motor (11) drives and pulls the chuck (21) to open and close, realizing automatic clamping of the target tissue by the ultrasonic cutter head (2).

2. The ultrasonic surgical instrument according to claim 1, wherein The ultrasonic handle (1) includes an ultrasonic waveguide rod (15), and the chuck (21) is arranged at the zero displacement node of the ultrasonic waveguide rod (15).

3. The ultrasonic surgical instrument according to claim 2, wherein, A cutter head (22) is provided at the front end of the ultrasonic waveguide rod (15), and the end of the chuck (21) is rotatably installed at the zero displacement node at the front end of the ultrasonic waveguide rod (15).

4. The ultrasonic surgical instrument according to claim 2, wherein The rear end of the ultrasonic waveguide rod (15) is connected to a horn (14) through a screw, and a sleeve (24) is sleeved outside the ultrasonic waveguide rod (15).

5. The ultrasonic surgical instrument according to claim 4, wherein A flange (16) is provided inside the ultrasonic handle (1), and the flange (16) is used to support the horn (14).

6. The ultrasonic surgical instrument according to claim 4, wherein A transmission assembly (12) is provided at the output end of the motor (11), and the motor (11) drives and pulls the chuck (21) through the transmission assembly (12).

7. The ultrasonic surgical instrument according to claim 6, wherein The transmission assembly (12) is divided into two groups. Each group of the transmission assembly (12) includes a transmission rope (121) and pulleys (122) respectively arranged at the front and rear ends of the ultrasonic handle (1). The output shaft of the motor (11) is connected to the pulley (122) through the transmission rope (121).

8. The ultrasonic surgical instrument according to claim 7, wherein, An outer shell (17) is provided outside the ultrasonic handle (1), and two grooves for placing the transmission ropes (121) are symmetrically arranged on the inner wall of the outer shell (17) and the outer wall of the sleeve (24) respectively. Anti-slip materials are provided on the outer shell (17).

9. The ultrasonic surgical instrument according to claim 8, wherein The zero displacement node of the ultrasonic waveguide rod (15) is obtained by performing a finite element frequency simulation analysis on the ultrasonic waveguide rod (15).

Images