KR102157796B1 - Ultrasonic Surgical Device Capable of Desorption of Power - Google Patents

Abstract

Disclosed is an ultrasonic surgical device detachably coupled to a power supply unit to increase ease in maintenance. According to one embodiment of the present invention, the ultrasonic surgical device comprises: a power supply unit; a handpiece receiving power from the power supply unit to generate vibrational energy; an end effector holding tissue and using the vibrational energy to cut or suture the tissue; a shaft assembly transferring the vibrational energy generated from the handpiece to the end effector; and a connector determining electric connection between the handpiece and the power supply unit.

Description

Ultrasonic Surgical Device Capable of Desorption of Power}

The present invention relates to an ultrasonic surgical device that is detachable between a hand piece and a power supply device.

The content described in this section merely provides background information on the present embodiment and does not constitute the prior art.

Conventionally, a surgical scalpel has been used to cut or incise an organ or tissue, but there is a concern that bleeding due to blood vessel damage is accompanied by an incorrect procedure and exposure to infection due to blood vessel damage. In addition, a separate suturing process is required, which increases the operation time.

In order to solve these problems, surgical devices using energy have been developed. Surgical devices using ultrasonic energy, radio frequency (RF), laser, plasma, etc. as used energy are known.

Among them, ultrasonic surgical devices using ultrasonic energy are surgical equipment used in various surgical fields such as general surgery, orthopedics, ophthalmology, plastic surgery, urology or neurosurgery, and are used in tissue incision, fragmentation, ablation, and Performs functions such as suturing.

The ultrasonic surgical device includes an end effector having a blade that vibrates at an ultrasonic frequency to cut and seal the tissue. The ultrasonic surgical apparatus includes a piezoelectric element that converts electric power into ultrasonic vibrations, and the ultrasonic vibrations are transmitted to the blade elements along the acoustic waveguide. The end effector grips or separates the tissue by the trigger operation, and performs ablation and suturing with the transmitted ultrasonic vibration.

In the conventional ultrasonic surgical device, a handpiece including a female electronic device is connected to a power device by wire, and generates vibration by receiving power from the power device. At this time, in the process of using the ultrasonic surgical device, the wires connecting the power device and the hand piece were often twisted and damaged. In this case, the conventional ultrasonic surgical device has the inconvenience of having to replace all the piezoelectric elements together with the wires connected to the power supply device.

An object of the present invention is to provide an ultrasonic surgical device in which an electric wire connecting a handpiece and a power supply device can be detached using a connector.

According to an aspect of the present invention, from a power supply and an end effector that receives power from the power supply to generate vibration energy and a tissue, and cuts and seals the tissue using vibration energy, and the hand piece. It provides an ultrasonic surgical apparatus comprising a shaft assembly for transmitting the generated vibration energy to the end effector, and a connector for determining electrical connection between the hand piece and the power supply.

According to an aspect of the present invention, the connector is characterized in that it is implemented in the hand piece,

As described above, according to an aspect of the present invention, by attaching and detaching the wire connecting the handpiece and the power supply device using a connector, the convenience of maintenance is improved, and the power supply device can be selectively connected and used. There is this.

1 is a view showing an ultrasonic surgical device according to an embodiment of the present invention.
2 is a view showing the configuration of a hand piece according to an embodiment of the present invention.
3 is a view showing a cross section of a vibrator according to an embodiment of the present invention.
4 is a diagram illustrating a measurement of properties of a piezoelectric single crystal element after adjusting the tightening torque of the vibrator according to an embodiment of the present invention.
5 is a circuit diagram of an ultrasonic surgical apparatus according to an embodiment of the present invention.
6 is a view showing a piezoelectric single crystal element fastening device of the ultrasonic surgical device according to an embodiment of the present invention.
7 is a flowchart illustrating a method of fastening a piezoelectric single crystal element of an ultrasonic surgical device according to an embodiment of the present invention.
8 is a view showing a shaft assembly and a vibrator according to another embodiment of the present invention.
9 is an enlarged view and a cross-sectional view of a boundary between a shaft assembly and a vibrator according to another embodiment of the present invention.
10 is a view showing a wireless ultrasonic surgical device according to another embodiment of the present invention.
11 is a view showing the configuration of a hand piece according to another embodiment of the present invention.
12 is a view showing the configuration of the shaft assembly according to the first embodiment of the present invention.
13 is a view showing the configuration of a shaft assembly according to a second embodiment of the present invention.
14 is a view showing the configuration of a shaft assembly according to a third embodiment of the present invention.
15 is a view showing the configuration of a shaft assembly according to a fourth embodiment of the present invention.
16 is a view showing the configuration of a shaft assembly according to a fifth embodiment of the present invention.
17 is a view showing the configuration of a hand piece according to another embodiment of the present invention.

In the present invention, various changes may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements.

Terms such as first, second, A, and B may be used to describe various elements, but the elements should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

The terms used in the present application are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "include" or "have" should be understood as not precluding the possibility of existence or addition of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification. .

Unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, each configuration, process, process, or method included in each embodiment of the present invention may be shared within a range not technically contradicting each other.

A typical ultrasonic surgical device is a surgical tool that removes some tissues of the human body by moving a blade at a high speed. In general, as a method of rapidly moving the blade, electricity is applied to the piezoelectric element to drive the blade with a vibrating force that the piezoelectric element vibrates. The ultrasonic surgery apparatus 100 has the advantage of less heat generation when driving the blade, and does not bring about protein denaturation of surrounding tissues when some tissues are removed, which can reduce complications caused by inflammation of the affected area, and can relieve patient pain. have.

A piezoelectric element used in a conventional ultrasonic surgical device mainly uses a ceramic series (PZT4 or PZT8) having a low dielectric constant (ε) and a high mechanical quality factor (Qm). The mechanical quality factor (Qm) represents the reciprocal of the mechanical loss generated inside the specimen when converting electrical energy into mechanical energy, and represents the degree of loss of a piezoelectric element, and can be calculated as Equation 1 below.

[Equation 1]

Anti-resonant frequency (Hz), resonant frequency (Hz), capacitance of specimen at 1khz, resistance of resonant specimen (Ω)

The piezoelectric element can increase vibration energy efficiency by lowering the mechanical quality factor. The ultrasonic surgical device may use a single crystal piezoelectric element instead of polycrystalline PZT4 or PZT8. Since the piezoelectric single crystal device has much higher vibration efficiency than the piezoelectric polycrystalline device, the ultrasonic surgical apparatus using the piezoelectric single crystal device can remove the tissue in a short time, thereby minimizing the effect on surrounding tissues.

However, a piezoelectric single crystal device generates a lot of heat when driven at a resonant frequency due to a low mechanical quality factor (Qm). When the temperature of the piezoelectric single crystal element exceeds the phase transition temperature Trt due to heat generation, the characteristics of the piezoelectric single crystal element change and performance is degraded, making it difficult to continuously drive. In addition, when the temperature of the piezoelectric single crystal element exceeds the Curie temperature (Qc), the magnetic properties change, and a change in the C value of the driving circuit causes mismatch in the resonance circuit. In order to apply a piezoelectric single crystal element to an ultrasonic surgical device, a method of preventing excessive heat generation during driving is required.

1 is a view showing an ultrasonic surgical device according to an embodiment of the present invention.

Referring to FIG. 1, an ultrasonic surgical apparatus 100 according to an embodiment of the present invention includes a power supply device (Generator, 110), a hand piece (120), a hand instrument (130), a shaft assembly (140), an end effector ( 150) and a handle assembly 160.

The hand piece 120 receives power from the power supply 110 and generates vibration energy. The hand piece 120 includes a piezoelectric element that converts electrical energy into vibration energy and vibration energy into electrical energy. The piezoelectric element receives power supplied from the power supply 110 and converts it into vibration energy. The piezoelectric element is composed of a single crystal piezoelectric element.

The hand piece 120 transmits the generated ultrasonic vibration to the shaft assembly 140. The hand piece 120 is coupled to the hand instrument 130 to be connected to the shaft assembly 140. The hand piece 120 transmits the vibration energy to the shaft assembly 140 so that the generated vibration energy can be transmitted to the end effector 150.

The hand instrument 130 fixes the hand piece 120 and the shaft assembly 140 and controls the operation of each component in the ultrasonic surgery device 100.

The hand instrument 130 secures the hand piece 120 and the shaft assembly 140. The hand instrument 130 has an insertion hole for each of the hand piece 120 and the shaft assembly 140 so that the hand piece 120 and the shaft assembly 140 can be respectively inserted into the hand instrument 130. The hand instrument 130 fixes the inserted hand piece 120 and the shaft assembly 140, and transmits the vibration energy generated by the hand piece 120 to the shaft assembly 140, so that the vibration energy is transmitted to the shaft assembly 140. ) To be delivered to the end effector 150.

The hand instrument 130 includes a control unit (not shown) therein to control the operation of each component in the ultrasound surgery apparatus 100. The hand instrument 130 includes an input unit (not shown) that receives an input such as an operation method of the end effector 150 from a user, and the control unit (not shown) controls the operation of each component according to the user's input. For example, if the user's input is an input that causes tissue to be cut using the end effector 150, the control unit (not shown) increases the power of the power supply 110 to increase the vibration generated by the handpiece 120. You can increase the amount of energy.

The shaft assembly 140 transfers vibration energy transmitted from the hand instrument 130 to the end effector 150. One end of the shaft assembly 140 is connected to the end effector 150, and the other end is inserted into the insertion hole of the hand instrument 130 and fixed. The shaft assembly 140 is fixed to the hand instrument 130, receives vibration energy transmitted from the hand instrument 130, and transmits the applied vibration energy to the end effector 150. In addition, the shaft assembly 140 may be rotated within the insertion hole of the hand instrument 130, and the direction of the end effector 150 may be controlled by rotating.

The end effector 150 grasps the tissue, and cuts and seals the tissue using the transmitted vibration energy. The end effector 150 grips or moves away from the tissue according to the operation of the handle assembly 160. When holding the tissue, the end effector 150 cuts and seals the tissue using the transmitted vibration energy.

The handle assembly 160 allows the user to hold the ultrasonic surgical device 100 and control the operation of the end effector 150. The handle assembly 160 includes a handle unit that enables a user to grip the ultrasonic surgical apparatus 100 and a trigger unit that controls the gripping operation of the end effector 150.

2 is a view showing a configuration of a handpiece according to an embodiment of the present invention, Figure 3 is a view showing a cross-section of a vibrator according to an embodiment of the present invention.

2 and 3, the hand piece 120 according to an embodiment of the present invention includes a housing 210 and a vibrator 220.

The vibrator 220 is disposed inside the housing 210 and vibrates by receiving power applied from a power supply device.

The vibrator 220 includes a fixed element 222, a tail mass 224, a piezoelectric single crystal element 226, and a head horn 228.

Since the fixed element 222 is coupled to the head horn 228 via the piezoelectric single crystal element 226, the piezoelectric single crystal element 226 is formed of the fixed element 222 and the head phone 228 as shown in FIG. Is fixed between The fixed element 222 and the head horn 228 may be coupled by an external torque acting on the fixed element 222. Here, the fixing element 222 may be implemented as a bolt, for example, and a screw thread may be implemented at the lower end of the head horn 228 so that the fixing element 222 and the head horn 228 can be coupled.

At this time, by the torque acting on the fixed element 222, the fixed element 222 applies a force in the direction of the piezoelectric single crystal element 226, and the head horn 228 is a reaction of the force acting by the fixed element 222. Also, a force of the same magnitude is applied toward the piezoelectric single crystal element 226. The piezoelectric single crystal element 226 is fixed by the fixed element 222, but at the same time is stressed by the fixed element 222 and the head horn 228. Until the polarization is completed and the properties of the piezoelectric single crystal element 226 are no longer changed, the stress acting on the piezoelectric element 226 causes a change in the properties of the piezoelectric single crystal element 226. The properties of the piezoelectric single crystal element 226 include a resonance frequency, an anti-resonant frequency, or an impedance of the piezoelectric single crystal element 226. If the piezoelectric element is polycrystalline, the change in the properties of the piezoelectric element is not a big problem. However, since the polarization of the piezoelectric single crystal element 226 is typically consumed from several days to tens of days, the piezoelectric single crystal element 226 is mounted in the hand piece 120 and continues to change its properties while operating. 100), it causes difficulty in matching with the other components, particularly the power supply 110.

The piezoelectric single crystal element 226 receives power from the power supply 110 and generates vibration energy.

The piezoelectric single crystal element 226 has an advantage of having a piezoelectric constant several times higher than that of the piezoelectric polycrystalline element. Accordingly, even if the same electric power is applied to the piezoelectric single crystal element 226, compared to the piezoelectric polycrystalline element, the piezoelectric single crystal element 226 has a larger vibrational displacement, and thus, can have better performance. However, the piezoelectric single crystal element 226 has a relatively low mechanical quality factor (Qm) compared to the piezoelectric polycrystalline element and thus generates a relatively large amount of heat, so if it is continuously driven at the resonance frequency, the phase transition temperature (Trt) or the Curie temperature (Tc) As a result, there is a problem that the properties of the piezoelectric single crystal element 226 change.

The piezoelectric single crystal element 226 may be implemented so that the anti-resonant frequency is used as the frequency band in order to minimize heat generation during driving. In the piezoelectric single crystal element 226, the properties of the piezoelectric single crystal element 226 change due to the stress applied by the fixed element 222. Accordingly, the torque of the fixed element 222 may be finely adjusted so that the anti-resonant frequency of the piezoelectric single crystal element 226 becomes the actual frequency used. The piezoelectric single crystal element 226 has the highest impedance at the anti-resonant frequency, so that the current flowing through the piezoelectric single crystal element 226 can be minimized, and this is a condition in which heat generation can be reduced. The device 100 can be continuously driven because no change in properties occurs during driving.

The fixed element 222 passes through the tail mass 224 and the piezoelectric single crystal element 226 and is aligned, and is coupled to the head horn 228 to fix the piezoelectric single crystal element 226. The piezoelectric single crystal element 226 changes the properties of the piezoelectric single crystal element 226 according to the fastening torque of the fixed element 222. The fixing element 222 may have a shape such as a bolt, and the head horn 228 may have a shape such as a screw thread. Accordingly, as the tightening torque strength of the fixing element 220 tightened to the head horn 228 increases, the compression force applied to the vibrator 220 increases, thereby enabling a large amplitude operation.

As described above, the piezoelectric single crystal element 226 is fixed by the fixed element 222, and stress varies with the piezoelectric single crystal element 226 according to the fastening torque to be fixed. For this reason, the piezoelectric single crystal element 226 has a different anti-resonant frequency according to the fastening torque of the fixed element 222.

When the fixed element 222 is fixed to the head horn 228, it vibrates together with the vibration of the piezoelectric single crystal element 226, and transmits vibration energy to the outside of the hand piece 120.

4 is a diagram illustrating a measurement of properties of a piezoelectric single crystal element after adjusting the tightening torque of the vibrator according to an embodiment of the present invention.

After assembling the vibrator 220, the anti-resonant frequency of the vibrator 220 is measured, and the tightening torque of the fixed element 222 may be adjusted until the anti-resonant frequency of the vibrator 220 enters the frequency band of use. For example, if the frequency band used is between 55 Hz and 57 Hz, and the anti-resonant frequency 615 of the piezoelectric single crystal element 226 is 58 Hz or more, the fastening torque must be narrowed, so that the fixed element 222 is further added to increase the fastening torque. Can be tightened. Conversely, if the anti-resonant frequency 615 of the piezoelectric single crystal element 226 is lower than the use frequency band, the fixed element 222 may be tightened to lower the fastening torque.

As a result, the assembled piezoelectric single crystal element 226 has an impedance 720 of about 24 Ω and an anti-resonant frequency 715 of about 56 Hz as shown in FIG. 4. As the fastening torque was increased by tightening the fixed element 222, the resonant frequency 710 and the anti-resonant frequency 715 band were changed to a narrower band. Accordingly, it can be seen that the measured impedance 720 is also variable.

5 is a circuit diagram of an ultrasonic surgical apparatus according to an embodiment of the present invention.

The circuit of the ultrasonic surgical device is composed of a power supply 110, a matching circuit unit 170, a hand piece 120, and a hand instrument 130.

The power supply 110 includes a circuit capable of generating power. The power supply device 110 may include an insulator inside, or an insulator may be positioned outside the power supply device 110.

The matching circuit unit 170 matches to increase impedance in order to reduce the current flowing to the hand piece 120 at the frequency of use using a parallel resonance circuit. The current flowing from the power supply unit 110 is distributed to the matching circuit unit 170 and the hand piece 120, and thus increasing the size of the impedance at the matching circuit unit 170 may reduce the current flowing to the hand piece 120. When the current flowing to the hand piece 120 decreases, heat generation in the hand piece 120 may be reduced. When using the piezoelectric single crystal element 226, the current flowing to the handpiece 120 is reduced by increasing the impedance by the matching circuit unit 170 to prevent changes in the properties of the piezoelectric single crystal element 226 caused by heat generation. Even when driving, the temperature of the hand piece 120 may not reach the state transition temperature Trc or the Curie temperature Tc.

The matching circuit unit 170 may be provided in some configurations within the power supply unit 110, and the matching circuit unit 170 may change a capacitance value and is connected in parallel with the transducer circuit within the hand piece 120. Therefore, when the impedance of the matching circuit unit 170 increases, the current flowing to the hand piece 120 decreases.

The piezoelectric single crystal element 226 is capable of driving the ultrasonic surgery device even when only 1Kv to 2Kv is applied, but the piezoelectric polycrystalline element can be driven with the same performance only when 3Kv to 4Kv is applied, so the required voltage varies by about 2 to 3 times. . In other words, when the same voltage is applied, the driving efficiency of the piezoelectric single crystal element 226 is two to three times higher than that of the piezoelectric polycrystalline element, and thus vibration energy is greater than that of the piezoelectric polycrystalline element even when the anti-resonant frequency is used.

6 is a view showing a piezoelectric single crystal element fastening device of the ultrasonic surgical device according to an embodiment of the present invention.

Referring to FIG. 6, a piezoelectric single crystal element fastening apparatus 700 according to an embodiment of the present invention includes a fixed element fastening unit 710, an analysis unit 720, and a control unit 730.

The fixed element fastening part 710 is fastened to the piezoelectric element in the vibrator 220 or applies torque to the fixed element to be fastened to the piezoelectric element. The fixed element fastening part 710 applies a certain amount of torque to the fixed element or stops applying the torque under the control of the controller 730. The fixed element fastening part 710 applies a torque to the fixed element so that the fixed element is coupled with the head horn in the vibrator to fix the piezoelectric element.

The analysis unit 720 analyzes the properties of the piezoelectric element in the vibrator 220 to which the fixed element is fastened by the fixed element fastening unit 710. The analysis unit 720 analyzes properties such as resonance frequency, anti-resonance frequency, or impedance of the piezoelectric element in the vibrator 220 and transmits the analyzed content to the control unit 730.

The controller 730 controls the operation of the fixed element fastening unit 710 according to the analysis result of the properties of the piezoelectric element.

The controller 730 receives the analysis result of the properties of the piezoelectric element from the analysis unit 720. Based on the received analysis result, the controller 730 checks what is the current resonant frequency, anti-resonant frequency, or impedance value of the piezoelectric element.

The controller 730 controls the fixed element fastening part 710 by comparing the properties of the target piezoelectric element with the analyzed properties of the vibrator 220. The controller 730 may receive a target value of a property desired by the vibrator 220 from the outside by using a separate pressure device (not shown) or a separate communication. To be more specific, the controller 730 may receive a used frequency band and control the fixed element fastening unit 710 until the anti-resonant frequency of the vibrator 220 matches the used frequency band. For example, the controller 730 compares the anti-resonant frequency of the target vibrator 220 with the anti-resonant frequency of the vibrator 220 analyzed by the analysis unit 720. The controller 730 compares both properties and determines whether the property of the current vibrator 220 matches the property of the target vibrator or whether the error ranges of both properties have entered a certain range. It is determined whether both properties coincide or whether the error range of both properties has entered a certain range. When both properties match or the error range of the difference between both properties enters within a certain range, the controller 730 controls the fixed element fastening part 710 so that the fixed device fastening part 710 no longer operates. On the other hand, when the two properties do not match or the difference between the two properties does not enter the error range within a certain range, the control unit 730 causes the fixed element fastening unit 710 to apply additional torque to the fixed element or the fixed element fastening unit. Control so that 710 can be applied to reduce the torque to the fixed element.

In this way, in the piezoelectric single crystal element fastening device 700, when the fixed element is fastened to the vibrator 220 to fix the vibrator, the properties of the vibrator may be fastened to match the target value. As described above, since the properties of the vibrator are variable due to stress, when the fixed element is arbitrarily fastened, the properties of the vibrator become difficult to match the target value. In consideration of this, the piezoelectric single crystal element fastening device 710 directly analyzes the properties of the vibrator when fastening the fixed element, so that the fixed element can be fastened in the vibrator at a level where the properties of the stator reach the target value. Can be controlled. In addition, the piezoelectric single crystal device has characteristics that are relatively vulnerable to external impacts compared to the piezoelectric polycrystalline device. According to d, if the torque applied to the fixed element is not accurately adjusted, there is a possibility that the single crystal vibrator may be damaged. The piezoelectric single crystal element fastening device 710 analyzes the properties of the vibrator 220 and applies an appropriate torque to the fixed element according to the analysis result, so even if it is a piezoelectric single crystal element that is relatively vulnerable to external shocks, the fixed element is fastened without difficulty. can do.

7 is a flowchart illustrating a method of fastening a piezoelectric single crystal element of an ultrasonic surgical device according to an embodiment of the present invention.

The control unit 730 receives the target anti-resonant frequency of the vibrator property (S810). The control unit 730 receives an anti-resonant frequency desired for the vibrator 220 from the outside. This may be a frequency band used when driving the ultrasonic surgical device.

The controller 730 controls the fixed element fastening part 710 to apply an initial fastening torque to the fixed element (S820).

The control unit 730 applies a step-by-step fastening torque (1~3kgf?cm) to the fixed element (S830).

The analysis unit 720 analyzes the properties of the vibrator 220 and measures the anti-resonant frequency of the vibrator 220 (S840).

The control unit 730 determines whether the analyzed anti-resonant frequency of the vibrator 220 corresponds to the use frequency (S850). When the analyzed anti-resonant frequency of the vibrator does not coincide with the used frequency (the error range of the difference between the two frequencies enters within a certain range), the control unit 730 controls the fixed element fastening part 710 to provide a step-by-step fastening torque to the fixed element. Should be applied.

When the analyzed anti-resonant frequency of the vibrator coincides with the used frequency (the error range of the difference between the two frequencies enters within a certain range), the control unit 730 stops the fixed element connection unit so that the fixed element connection unit 710 does not operate. Control (710) (S860).

FIG. 8 is a view showing a shaft assembly and a vibrator according to another embodiment of the present invention, and FIG. 9 is an enlarged view and a cross-sectional view of a boundary between the shaft assembly and the vibrator according to another embodiment of the present invention.

The shaft assembly 140 and the vibrator 220 according to another embodiment of the present invention operate in the same manner as the shaft assembly 140 and the vibrator 220 described with reference to FIGS. 1 to 7, but both configurations 140 and 220 Is manufactured in one piece. In particular, referring to FIG. 9, it can be seen that there is no separate connector at the boundary between the shaft assembly 140 and the vibrator 220. That is, the shaft assembly 140 and the vibrator 220 in the hand piece may be integrally manufactured. As such, as each of the components 140 and 220 is manufactured as an integral type, the following effects are derived. Since both configurations are manufactured as an integral type, convenience in the manufacturing process can be increased. When both configurations are manufactured by different processes, they must be manufactured so that the sizes of the portions to which both are connected to each other match. Accordingly, both configurations require a detailed manufacturing process. On the other hand, when both components are manufactured integrally, there is no part to which both components are connected, thereby increasing the convenience of manufacturing. In addition, since both components are implemented integrally, the vibration generated from the vibrator 220 can be completely transmitted to the shaft assembly 140. Conventionally, a connector is used to connect both components, and no matter how precise a connector is, a gap between the connector and both components is inevitably generated. Due to this gap, loss occurs in the transmission process of vibration. Due to the loss of vibration, all of the intended vibration amount cannot be transmitted to the blade or the end effector through the shaft assembly 140, and thus the blade or the end effector may not operate completely. The shaft assembly 140 and the vibrator 220 according to another embodiment of the present invention prevent loss of vibration so that the blade or the end effector can operate completely.

10 is a view showing a wireless ultrasonic surgical device according to another embodiment of the present invention.

Referring to FIG. 10, a wireless ultrasonic surgical device 1000 according to another embodiment of the present invention includes a battery 1110, a hand piece 1120, a hand instrument 1130, a shaft assembly 1140, and an end effector 1150. , Handle assembly 1160 and adapter 1170.

The battery 1110 supplies power so that the hand piece 1120 can vibrate.

The battery 1110 may be charged by receiving energy collected by the shaft assembly 1140 and may be charged by an external power source. The battery 1110 is configured to be detachable in the handle assembly 1160, and receives electric energy collected from the shaft assembly 1140 and a power supply ground that can be electrically connected to supply power to the hand piece 1120. It includes a charging ground to enable charging. The battery 1110 is directly electrically connected to the connection circuit 1180 and receives the electric energy collected by the shaft assembly 1140 by the connection circuit 1180.

The hand piece 1120 receives power from the battery 1110 to generate vibration energy, and transmits ultrasonic vibration to the shaft assembly 1140.

The hand piece 1120 receives power from the power supply 1110 and generates vibration energy. The hand piece 1120 includes a piezoelectric element that converts electrical energy into vibration energy and vibration energy into electrical energy. The piezoelectric element receives power supplied from the battery 1110 and converts it into vibration energy.

The hand piece 1120 transmits the generated ultrasonic vibration to the shaft assembly 1140. The hand piece 1120 is coupled to the hand instrument 1130 and connected to the shaft assembly 1140. The hand piece 1120 transmits the vibration energy to the shaft assembly 1140 so that the generated vibration energy can be transmitted to the end effector 1150.

The hand instrument 1130 fixes the hand piece 1120 and the shaft assembly 1140, and controls the operation of each component in the wireless ultrasonic surgical device 1000.

Hand instrument 1130 secures hand piece 1120 and shaft assembly 1140. The hand instrument 1130 has an insertion hole for the hand piece 1120 and the shaft assembly 1140, so that the hand piece 1120 and the shaft assembly 1140 can be inserted into the hand instrument 1130. The hand instrument 1130 fixes the inserted hand piece 1120 and the shaft assembly 1140, and transmits the vibration energy generated by the hand piece 1120 to the shaft assembly 1140, so that the vibration energy is transferred to the shaft assembly 1140. ) To be delivered to the end effector 1150.

The hand instrument 1130 includes a control unit (not shown) therein to control the operation of each component in the wireless ultrasonic surgical device 1000. The hand instrument 1130 includes an input unit 131 that receives input from a user such as an operation method of the end effector 1150, and the control unit 132 controls the operation of each component according to the user's input. For example, if the user's input is an input for cutting a tissue using an end effector, the controller 132 increases the amount of vibration energy generated by the handpiece 1120 by increasing the power of the battery 1110. I can. When the battery 1110 is not in a fully charged state, the controller 132 supplies electrical energy obtained by the shaft assembly 1140 from the vibration energy generated by the handpiece 1120 to the battery 1110 to the battery 1110. Can be made to be charged.

The shaft assembly 1140 includes a tubular radio wave rod that transmits vibration energy transmitted from the hand instrument 1130 to the end effector 1150 and a charging patch that converts pressure energy generated by bumping the tubular radio rod into electrical energy. Include.

One end of the shaft assembly 1140 is connected to the end effector 1150, and the other end is inserted into and fixed to the insertion hole of the hand instrument 1130. The shaft assembly 1140 is fixed to the hand instrument 1130, receives vibration energy transmitted from the hand instrument 1130, and transmits the applied vibration energy to the end effector 1150. In addition, the shaft assembly 1140 may rotate within the insertion hole of the hand instrument 1130, and by rotating, the direction of the end effector may be controlled.

The shaft assembly 1140 may collect some mechanical shock energy generated while rotating while transmitting vibration energy to the end effector 1150 as electrical energy and supply it to the battery 1110. There is a charging patch in the shaft assembly 1140 to collect a part of the impact energy applied to the charging patch as electrical energy while the shaft assembly 1140 rotates within the insertion hole of the hand instrument 1130, and this is the hand instrument 1130. It is supplied to the battery 1110 through.

The end effector 1150 grasps the tissue, cuts and seals the tissue using the transmitted vibration energy. The end effector 1150 grips or moves away from the tissue according to the operation of the handle assembly 1160. When holding the tissue, the end effector 1150 cuts and sutures the tissue using the transmitted vibrational energy.

The handle assembly 1160 allows the user to hold the wireless ultrasonic surgical device 1000 and control the operation of the end effector 1150. The handle assembly 1160 includes a handle unit that enables a user to grip the wireless ultrasonic surgical device 1000 and a trigger unit that controls the gripping operation of the end effector 1150.

The adapter 1170 connects the shaft assembly 1140 and the hand instrument 1130, and fixes the end of the shaft assembly 1140 to the hand instrument 1130 even when the shaft assembly 1140 rotates. The adapter 1170 is made of a material that can transfer the vibration energy of the hand piece 1120 to the shaft assembly 1140 well, and constitutes a path for transferring the energy collected by the shaft assembly 1140 to the battery 1110. It contains the circuit.

The connection circuit 1180 may connect the battery 1110 and the shaft assembly 1140. The connection circuit 180 transfers current to the battery 1110 whenever current flows by the shaft assembly 1140 so that the battery 1110 can be charged using the electrical energy collected by the shaft assembly 1140

11 is a view showing the configuration of a hand piece according to an embodiment of the present invention.

Referring to FIG. 11, a hand piece 1120 according to an embodiment of the present invention includes a housing 1210 and a vibrator 1220.

The vibrator 1220 is disposed inside the housing 1210 and vibrates by receiving power applied from a power supply device.

The vibrator 1220 includes a fixed element 1222, a tail mass 11224, a piezoelectric element 1226, and a head horn 1228.

Since the fixed element 1222 is coupled to the head horn 1228 via the piezoelectric element 1226, the piezoelectric element 1226 is between the fixed element 1222 and the head horn 1228 as shown in FIG. It is fixed. The fixed element 1222 and the head horn 1228 may be coupled by an external torque acting on the fixed element 1222. Here, the fixing element 1222 may be implemented as a bolt, for example, and a screw thread may be implemented at the lower end of the head horn 1228 so that the fixing element 1222 and the head horn 1228 may be coupled.

At this time, by the torque acting on the fixed element 1222, the fixed element 1222 applies a force in the direction of the piezoelectric element 1226, and the head horn 1228 is also a reaction of the force acting by the fixed element 1222. The same amount of force is applied in the direction of the piezoelectric element 1226. The piezoelectric element 1226 is fixed by a coupling between the fixed element 1222 and the head horn 1228.

The piezoelectric element 1226 receives power from the battery 1110 and generates vibration energy. The vibration energy generated in the piezoelectric element 1226 varies according to the frequency provided to the piezoelectric element. The piezoelectric element 1226 emits the largest vibration energy at a natural frequency, and the piezoelectric element 1226 may have properties such as a natural frequency changed due to a fastening torque by the fixed element 1222.

12 is a view showing the configuration of the shaft assembly according to the first embodiment of the present invention.

Referring to FIG. 12, the shaft assembly 1140 according to the first embodiment of the present invention includes a metal tube 1310, an insulating member 1320, a filling patch 1330, a cavity 1340, and an impact transmission medium 1350. , And a radio wave rod 1360.

The metal tube 1310 accommodates the insulating member 1320, the charging patch 1330, and the radio wave rod 1360, and the inside of the metal tube 1310 is coated with the insulating member 1320. The metal tube 1310 has one end connected to the adapter 1170 and the other end connected to the end effector 1150. Since the metal tube 1310 is made of a metal material, a leakage current may be transmitted to the outside. Therefore, when using the wireless ultrasonic surgical device 1000 by coating the inside of the metal tube 1310 with the insulating member 1320, the patient is prevented from electric shock.

The insulating member 1320 may be interposed between the metal tube 1310 and the filling patch 1330. The insulating member 1320 is made of a material such as silicon, and blocks electrical flow to the outside.

The charging patch 1330 converts vibrational energy of the radio wave rod 1360 into electrical energy. The shock patch 1330 applies an impact to the charging patch 1330 in the process of moving the shock transmission medium 1350 as the radio wave rod 1360 located in the shock transmission medium 1350 vibrates, and the mechanical energy generated at that time is applied. Converts into electrical energy.

The impact patch 1330 may be made of a piezoelectric polymer such as PVDF (Polyvinylidene Fluoride). The charging patch 1330 may generate a voltage due to a pressure applied to the charging patch 1330 when the shock delivery medium 1350 applies an impact to the charging patch 330. The impact patch 1330 covers the entire interior of the metal tube 1310, and electric energy can be simultaneously collected from a plurality of impact areas. The impact patch 1330 may collect more electrical energy as the pressure applied to the impact patch 1330 increases.

The charging patch 1330 may directly charge the battery 1110 by the connection circuit 180. The charging patch 1330 is directly connected to the connection circuit 180 and a conductor, and whenever electrical energy is generated in the charging patch 1330, a current flows through the connection circuit 180 and is connected to the battery 1110. 1110) can be charged. The connection circuit 180 is composed of a circuit separate from the circuit in which the battery 1110 is applied to the hand piece 1120.

The cavity 1340 is an empty space within the metal tube 1310. The cavity 1340 accommodates the impact delivery medium 1350 and provides a path for movement of the impact delivery medium 1350.

The impact transfer medium 1350 is a flowable material and moves within the cavity 1340 according to the vibration direction of the propagation rod 1360 moving in the impact transfer medium 1350. When the vibration width of the electric wave rod 1360 is large, the shock transmission medium 1350 has a large impact applied to the charging patch 1330, and if the vibration width of the electric wave rod 1360 is small, the shock applied to the charging patch 1330 Is weak. Accordingly, the impact transmission medium 1350 has a different intensity of pressure applied to the impact patch 1330 according to the vibration energy of the radio wave rod 1360.

The radio wave rod 1360 may be formed of a material having a high modulus of elasticity that is light in the form of a rod in the form of a long tube and can flexibly respond to an impact.

The radio wave rod 1360 rotates by vibration energy transmitted from the piezoelectric element 1226, and the rotational force is converted into kinetic energy and transmitted to the end effector 1150 in a translation manner. The radio wave rod 1360 moves in the shock transmission medium 1350 while the wireless ultrasonic surgical device 1000 is being driven, and forms a wave in the shock transmission medium 1350.

13 is a diagram showing the configuration of a shaft assembly 141 according to a second embodiment of the present invention.

13, the shaft assembly 141 according to the second embodiment of the present invention includes a metal tube 1310, an insulating member 1320, a filling patch 1330, a pressure ring 1351, and a radio wave rod 1360. Includes.

In the shaft assembly 141 according to the second embodiment of the present invention, since the pressure ring 1351 is attached to the radio wave rod 1360, when the radio wave rod 1360 moves, the pressure ring 1351 also moves.

Since the pressure ring 1351 is fitted in the radio wave rod 1360 and is attached to the radio wave rod 1360, a portion that applies pressure to the impact patch 1330 according to the position where the radio wave rod 1360 moves is also It will be different. The pressure ring 1351 may be made of a material having excellent durability that is not easily worn by friction, and is made of a material having a low coefficient of friction so as not to interfere with the movement of the radio wave rod 1360 due to friction with the impact patch 1330. Can be configured. In particular, the pressure ring 1351 may be made of a material such as silicon.

In the impact patch 1330, as the pressure ring 1351 moves along the radio wave rod 1360, a portion applying pressure to the impact patch 1330 moves, resulting in a potential change according to the piezoelectricity. The impact patch 1330 may collect a change in potential according to the piezoelectric as electrical energy, and transmit it to the battery 1110.

14 is a view showing the configuration of a shaft assembly according to a third embodiment of the present invention.

Referring to FIG. 14, the shaft assembly 142 according to the third embodiment of the present invention includes a metal tube 1310, an insulating member 1320, a filling patch 1330, a pressure embossing ring 1352, and a radio wave rod 1360. ).

In the shaft assembly 142 according to the third embodiment of the present invention, the pressure embossing ring 1352 is fitted to the radio wave rod 1360, so that when the radio wave rod 1360 moves, the pressure embossing ring 1352 also moves.

The piezoelectric embossing ring 1352 has a shape protruding a plurality of rows of embosses forming a groove, and may protrude so that the plurality of rows of embosses face the filling patch 1330. Since the pressure embossing ring 1352 has a groove shape, unlike the pressure ring 1351, only a portion that protrudes may contact the filling patch 1330 to press the filling patch 1330. Accordingly, the pressure embossing ring 1352 can reduce vibration energy loss of the radio wave rod 1360 due to friction with the charging patch 1330 compared to the pressure ring 1351.

15 is a view showing the configuration of a shaft assembly according to a fourth embodiment of the present invention.

Referring to FIG. 15, a shaft assembly 144 according to a fourth embodiment of the present invention includes a metal tube 1310, an insulating member 1320, a charging patch 1331, and a radio wave rod 1360.

The shaft assembly 144 according to the fourth embodiment of the present invention includes a charging patch 1331 located on the radio wave rod 1360. Accordingly, the charging patch 1331 moves together with the radio wave rod 1360 along the movement path of the radio wave rod 1360. The filling patch 1331 has a different portion in contact with the insulating member 1320 according to the vibration of the radio wave rod 1360. Accordingly, the charging patch 1331 may charge the battery 1110 by collecting piezoelectric energy generated when it comes into contact with the insulating member 1320 and then falls.

16 is a view showing the configuration of a shaft assembly according to a fifth embodiment of the present invention.

Referring to FIG. 16, the shaft assembly 145 according to the fifth embodiment of the present invention includes a metal tube 1310, an insulating member 1320, a charging patch 1332, a radio wave rod 1360, and a pressure protrusion 1370. Includes.

The pressing protrusion 1370 is formed on the insulating member 1320, and may be a protrusion protruding toward the electric wave rod 1360 by partially extending the insulating member 1320. The pressing protrusion 1370 presses the charging patch 1332 so that the charging patch 1332 generates a piezoelectric effect with a plurality of protrusions.

The charging patch 1332 may be configured to surround the radio wave rod 1360. The charging patch 1332 may have a different area in contact with the pressing protrusion 1370 in contact with the movement of the radio wave rod 1360, and collect the piezoelectric power generated when it comes into contact with the pressing protrusion 1370 and then fall, thereby collecting the battery 1110. Can be charged.

17 is a view showing the configuration of a hand piece according to another embodiment of the present invention.

Referring to FIG. 17, the hand piece 120 according to another embodiment of the present invention further includes a connector 1700.

The hand piece 120 according to an embodiment of the present invention operates by receiving power from a power supply device, and the hand piece 120 according to another embodiment of the present invention connects the hand piece and the power supply device 110 The connector 1700 is included in the wire.

The connector 1700 determines the electrical connection between the hand piece 120, more specifically the vibrator 220 and the electric wire (connecting the power supply 110). Since the connector 1700 is present in the hand piece 120, the following advantages exist.

As mentioned in the technical background of the invention, when an electric wire is present, it may be damaged due to various causes such as twisting of the electric wire in the process of using the ultrasonic treatment apparatus. The problem is that the electric wire is connected to the hand piece 120, and thus there is an inefficiency of replacing all of the hand piece 120 to replace the electric wire even though it is not a failure of the hand piece 120 in the related art. In particular, this inefficiency may be noticeable when the vibrator 220 and the shaft assembly 140 are integrally manufactured as described with reference to FIGS. 8 and 9. If the wire is broken in a situation in which the vibrator 220 and the shaft assembly 140 are integrally manufactured, a situation in which not only the hand piece 120 but also the shaft assembly is replaced for replacement of the wire occurs. In order to solve this inefficiency, the connector 1700 is included in the hand piece 120, and the electrical connection between the electric wire and the hand piece 120 is disconnected so that only the electric wire can be separated.

The connector 1700 is implemented within the hand piece 120. When the connector 1700 is exposed to the outside, separation between the electric wire and the hand piece 120 may be relatively easier. However, since the separation becomes easier, the electrical connection of the connector 1700 may be disconnected due to friction with other components regardless of the user's intention of the ultrasonic surgical device. If the ultrasonic surgical device is a wireless type as shown in FIGS. 10 to 16, there will be no problem, but a streamlined type as in FIGS. Thus, the connector 1700 prevents the electrical connection from being disconnected regardless of the user's intention due to friction with other external components.

If the ultrasonic surgical device is implemented in a streamlined manner as in FIGS. 1 to 9 and includes a battery so as to be operated in a wireless manner as in FIGS. 10 to 16, the connector 1700 is a hand piece 120 By managing the electrical connection between the and the power supply 110, the ultrasonic surgical device can determine the operation as a streamlined or wireless type. The user may use the connector 1700 as a wireless type for convenience by releasing the electrical connection between the handpiece 120 and the power supply 110 using the connector 1700, or may use it as a streamlined type by reconnecting.

In FIG. 7, each process is described as sequentially executing, but this is merely illustrative of the technical idea of an embodiment of the present invention. In other words, a person of ordinary skill in the art to which an embodiment of the present invention pertains may change the order shown in FIG. 7 and perform one or more processes of each process without departing from the essential characteristics of the embodiment of the present invention. Since it is executed in parallel and may be applied by various modifications and variations, FIG. 7 is not limited to a time series order.

Meanwhile, the processes shown in FIG. 7 can be implemented as computer-readable codes on a computer-readable recording medium. The computer-readable recording medium includes all types of recording devices that store data that can be read by a computer system. That is, computer-readable recording media include storage media such as magnetic storage media (eg, ROM, floppy disk, hard disk, etc.) and optical reading media (eg, CD-ROM, DVD, etc.). In addition, the computer-readable recording medium can be distributed over a computer system connected through a network to store and execute computer-readable codes in a distributed manner.

The above description is merely illustrative of the technical idea of the present embodiment, and those of ordinary skill in the technical field to which the present embodiment belongs will be able to make various modifications and variations without departing from the essential characteristics of the present embodiment. Accordingly, the present exemplary embodiments are not intended to limit the technical idea of the present exemplary embodiment, but are illustrative, and the scope of the technical idea of the present exemplary embodiment is not limited by these exemplary embodiments. The scope of protection of this embodiment should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present embodiment.

100: ultrasonic surgery device
110: power supply
120: handpiece
130: Hand Instruments
140: shaft assembly
150: end effector
160: handle assembly
210: housing
220: oscillator
222: fixed element
224: tail mass
226: piezoelectric element
228: head horn
700: piezoelectric single crystal element fastening device
710: fixed element fastening part
720: analysis unit
730: control unit

Claims (2)

Power supply;
A hand piece receiving power from the power supply and generating vibration energy;
An end effector that grips the tissue and cuts and sutures the tissue using vibration energy;
A shaft assembly that is coupled to the end effector, receives vibration energy from the handpiece, rotates, converts part of the vibration energy generated by the rotation into electrical energy, and collects it; And
And a connector for determining electrical connection between the hand piece and the power supply,
The shaft assembly includes a radio wave rod rotating by vibration energy transmitted from the handpiece, a charging patch for collecting electrical energy by converting a part of vibration energy generated according to the movement of the radio wave rod into electrical energy, and the charging patch and the Ultrasound surgical apparatus comprising a pressure ring positioned between the radio wave rods to pressurize the charging patch to promote electrical energy generation. Power supply;
A hand piece receiving power from the power supply and generating vibration energy;
An end effector that grips the tissue and cuts and sutures the tissue using vibration energy;
A shaft assembly that is coupled to the end effector, receives vibration energy from the handpiece, rotates, converts part of the vibration energy generated by the rotation into electrical energy, and collects it; And
And a connector for determining electrical connection between the hand piece and the power supply,
The shaft assembly includes a radio wave rod rotating by vibration energy transmitted from the handpiece, a charging patch for collecting electrical energy by converting a part of vibration energy generated according to the movement of the radio wave rod into electrical energy, and the charging patch and the Ultrasonic surgical apparatus comprising a pressure embossing having a shape protruding a plurality of rows of embosses forming a groove so as to be positioned between the radio wave rods to pressurize the filling patch.

Images