Ultrasonic bone knife handle equipped with force control device

Abstract

The present invention discloses an ultrasonic bone knife handle equipped with a force control device, which is characterized in that a movement sensing force control device is installed on the ultrasonic bone knife handle. In the above manner, the present invention enables the physician to sense several key pressure values ​​due to movement, so that when surgical efficiency is required, the cutting pressure can be accurately controlled within the maximum cutting efficiency range to ensure surgical efficiency. When surgical safety is required, the force control device can be turned off to avoid safety hazards caused by the telescopic elasticity of the blade head, thereby reflecting the maximum safety feature of the ultrasonic bone knife.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to an ultrasonic bone knife handle equipped with a force control device. Background Art

[0002] The ultrasonic bone scalpel uses high-intensity focused ultrasound technology to convert electrical energy into mechanical energy through a transducer. Through high-frequency ultrasonic vibrations, the water in the contacted tissue cells is vaporized and the protein hydrogen bonds are broken, thereby completely destroying the bone tissue that needs to be cut during the operation. When in use, the ultrasonic scalpel head energy propagates to the surrounding distance less than 200 microns. Since the high-intensity focused ultrasound only has a destructive effect on bone tissue of a specific hardness, it will not only not damage blood vessels and nerve tissues, but also stop bleeding at the surgical wound, further reducing the incision of minimally invasive surgery, greatly improving the accuracy, reliability and safety of the operation. It is an innovative technology with many characteristics and advantages that traditional manual and electric orthopedic surgical instruments cannot match. Current clinical surgery has entered the era of minimally invasive surgery, so the ultrasonic bone scalpel is gradually being used in various clinical work.

[0003] As the cutting pressure of the ultrasonic bone knife gradually increases, the cutting efficiency also increases. After reaching the peak of cutting efficiency, as the cutting pressure increases, the cutting efficiency decreases instead. After reaching a certain critical point, it decreases rapidly until there is no cutting efficiency. For example, the cutting pressure of a certain product in the maximum cutting efficiency range is: the gravity of an object of 300-500 grams. Beyond this cutting pressure, its cutting efficiency decreases rapidly. Although the ultrasonic bone knife is highly safe, its efficiency is relatively low. Therefore, surgeons tend to unconsciously increase their strength in order to increase efficiency, but they do not know that it is counterproductive. In addition, as the strength increases, surgeons are more likely to become fatigued, and are more likely to make mistakes and accidents. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide an ultrasonic bone knife handle equipped with a force control device, so that the cutting pressure when the maximum cutting efficiency range is reached can be sensed by the surgeon, thereby ensuring that the cutting pressure when the maximum cutting efficiency range is reached accurately during surgery, shortening the learning curve and reducing surgical risks.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide an ultrasonic bone knife handle equipped with a force control device, including an ultrasonic bone knife handle, on which a motion sensing force control device is installed.

[0006] Furthermore, the ultrasonic bone knife handle is provided with an ultrasonic bone knife head;

[0007] The motion sensing force control device is arranged inside the ultrasonic bone knife handle at one end away from the ultrasonic bone knife head.

[0008] Furthermore, an ultrasonic bone knife handle sliding sleeve is slidably provided on the ultrasonic bone knife handle;

[0009] The motion sensing force control device is arranged between the ultrasonic bone knife handle sliding sleeve and the ultrasonic bone knife handle.

[0010] Further, the mobile sensing force control device comprises a constant force spring and a connecting and fixing structure a;

[0011] The constant force spring is fixed on the tube wall of the ultrasonic bone knife handle sliding sleeve, one end of the connecting and fixing structure a is connected and fixed to the ultrasonic bone knife handle, and the other end of the connecting and fixing structure a is connected and fixed to the constant force spring stretching head end on the constant force spring.

[0012] Furthermore, the elastic force of the constant force spring is a high value of the cutting pressure in the maximum cutting efficiency range.

[0013] Further, the movement sensing force control device comprises a compression spring;

[0014] The compression spring is fixed between the ultrasonic bone knife handle and the ultrasonic bone knife handle sliding sleeve.

[0015] Furthermore, the initial compression force of the compression spring is a low value of the cutting pressure in the maximum cutting efficiency interval, and the maximum compression force is a high value of the cutting pressure in the maximum cutting efficiency interval.

[0016] Furthermore, the motion sensing force control device can be turned off.

[0017] Furthermore, a fastening screw is provided between the ultrasonic bone knife handle and the ultrasonic bone knife handle sliding sleeve.

[0018] The beneficial effects of the present invention are as follows: the present invention enables the physician to sense several key pressure values ​​due to movement, so that when surgical efficiency is required, the cutting pressure can be accurately controlled within the maximum cutting efficiency range to ensure surgical efficiency. When surgical safety is required, the force control device can be turned off to avoid safety hazards caused by the elasticity of the blade head, thereby reflecting the maximum safety feature of the ultrasonic bone knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an ultrasonic bone knife handle embodiment 1 of the present invention with a force control device added;

[0020] Figure 2 It is a structural schematic diagram of an ultrasonic bone knife handle embodiment 2 of the present invention with a force control device added;

[0021] Figure 3 It is a structural schematic diagram of Example 3 of an ultrasonic bone knife handle equipped with a force control device according to the present invention.

[0022] The markings of the components in the accompanying drawings are as follows:

[0023] 1. Ultrasonic bone knife blade; 2. Ultrasonic bone knife handle; 3. Ultrasonic bone knife handle sleeve; 41. Compression spring; 42. Constant force spring; 421. Constant force spring tension head end; 422. Connecting fixed structure a; 423. Connecting fixed structure b; 424. Connecting fixed structure c; 5. Ultrasonic bone knife power supply cable; 6. Tightening screws. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0025] See also Figure 1 , Figure 2 and Figure 3 , the embodiment of the present invention includes:

[0026] Example 1

[0027] like Figure 1 As shown, an embodiment of the present invention provides an ultrasonic bone knife handle with a force control device, including an ultrasonic bone knife head 1, an ultrasonic bone knife handle 2, an ultrasonic bone knife handle sliding sleeve 3 and a compression spring 41. The specific configuration is as follows:

[0028] The ultrasonic bone scalpel head 1 is installed at the front end of the ultrasonic bone scalpel handle 2, the ultrasonic bone scalpel handle sliding sleeve 3 is slidably installed outside the ultrasonic bone scalpel handle 2, and the front end of the ultrasonic bone scalpel handle sliding sleeve 3 (the side close to the ultrasonic bone scalpel head 1) is semi-enclosed, which will not affect the installation and removal of the ultrasonic bone scalpel head 1, and because it is semi-enclosed, the ultrasonic bone scalpel handle 2 will not slide out from the front end of the ultrasonic bone scalpel handle sliding sleeve 3 when it is subjected to force (elastic force of the force control device). The tail end of the ultrasonic bone scalpel handle 2 (the side away from the ultrasonic bone scalpel head 1) is provided with an ultrasonic bone scalpel power supply cable 5, and the tail end of the ultrasonic bone scalpel handle sliding sleeve 3 (the side away from the ultrasonic bone scalpel head 1) closes the inlet and outlet aperture where only the ultrasonic bone scalpel power supply cable 5 exists.

[0029] The compression spring 41 is fixed between the tail end of the ultrasonic bone knife handle 2 and the tail end of the ultrasonic bone knife handle sliding sleeve 3. The compression spring 41 can be a single spring or a pair of springs with a symmetrical design. After installation, the compression spring 41 is in a semi-compressed state, at which time the front end of the ultrasonic bone knife handle 2 contacts the front end of the ultrasonic bone knife handle sliding sleeve 3, and the elastic force of the compression spring 41 is the low value of the cutting pressure in the maximum cutting efficiency range. When the head end of the ultrasonic bone scalpel head 1 is under pressure during operation, and the pressure is lower than the elastic force in the initial compression state, the ultrasonic bone scalpel handle 2 will not slide in the ultrasonic bone scalpel handle sliding sleeve 3; as the pressure increases to a value higher than the elastic force in the initial compression state, the ultrasonic bone scalpel handle 2 slides in the ultrasonic bone scalpel handle sliding sleeve 3 (the surgeon can sense the low value of the cutting pressure in this maximum cutting efficiency interval), the compression spring 41 is compressed accordingly, the elastic force gradually increases, and the cutting pressure at the head end of the ultrasonic bone scalpel head 1 increases accordingly. When the compression spring 41 is compressed to the bottom, the elastic force is the high value of the cutting pressure in the maximum cutting efficiency interval. If the pressure is increased further, there is no retraction of the compression spring 41, and there is no sliding between the ultrasonic bone scalpel handle 2 and the ultrasonic bone scalpel handle sliding sleeve 3 (the surgeon can sense the high value of the cutting pressure in this maximum cutting efficiency interval), and there is no need to increase the surgical pressure. Pressure bone cutting near the midpoint of the elastic range is basically the highest surgical cutting efficiency. Efficiency is required in the early stage of bone cutting, but safety should be paid special attention to when the purpose is close to being achieved. When the force control device is not closed, there is no resistance after cutting through the bone, and the forward thrust generated by the compressed force control device recovery causes the ultrasonic bone knife head 1 to move forward at the surgical site, which may damage the tissue that should be protected. Therefore, when the operation needs to ensure safety, the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sliding sleeve 3 can be returned to the maximum cutting efficiency interval when there is no sliding, and the operation can be carried out below the low value of the cutting pressure, but the surgical efficiency will decrease; a fastening screw 6 is also provided between the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sliding sleeve 3, and the fastening screw 6 can also be tightened to fix the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sliding sleeve 3 so that they cannot slide, and the cutting pressure will not be transmitted to the compression spring 41, so the ultrasonic bone knife head 1 will not appear in the surgical site when the pressure at the front end of the bone is suddenly reduced due to the rebound of the compression spring 41. Unexpected movement of the ultrasonic bone knife head 1 will damage the tissue that should not be damaged.

[0030] Example 2

[0031] like Figure 2 As shown, an embodiment of the present invention provides an ultrasonic bone knife handle equipped with a force control device. The difference between embodiment 2 and embodiment 1 is that it includes a constant force spring 42 and a connecting and fixing structure a422, and the specific configuration is as follows:

[0032] The tail end (the side away from the ultrasonic bone knife blade head 1) of the ultrasonic bone knife handle sleeve 3 is semi-enclosed, and the constant force spring tension head end 421 on the constant force spring 42, the connection fixing structure a422 and the ultrasonic bone knife power supply cable 5 can enter and exit therein. The constant force spring 42 is fixed on the tube wall of the tail end (the side away from the ultrasonic bone knife blade head 1) of the ultrasonic bone knife handle sleeve 3. The connection fixing structure a422 is fixed to the tail end of the ultrasonic bone knife handle 2 and is connected and fixed to the constant force spring tension head end 421. The elastic force of the constant force spring 42 is the high value of the cutting pressure in the maximum cutting efficiency range. When the head end of the ultrasonic bone knife blade 1 is under pressure during operation and the pressure is lower than the elastic force of the constant force spring 42, the ultrasonic bone knife handle 2 will not slide in the sleeve; when the pressure gradually increases to be higher than the elastic force of the constant force spring 42, the constant force spring stretching head end 421 is stretched, and the ultrasonic bone knife handle 2 slides in the ultrasonic bone knife handle sliding sleeve 3 (the surgeon can sense the high value of the cutting pressure in this maximum cutting efficiency range). The elastic force of the constant force spring 42 does not increase during the stretching process, so the cutting pressure at the head end of the ultrasonic bone knife blade 1 maintains the high value of the cutting pressure in the maximum cutting efficiency range. The surgeon senses the relative sliding of the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sliding sleeve 3 and knows that there is no need to increase the surgical pressure, and the relative sliding of the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sliding sleeve 3 does not continue to weaken the surgical cutting efficiency. The highest surgical cutting efficiency point for bone cutting is located at a pressure before the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3 slide relative to each other. When the operation needs to ensure safety, it must be ensured that there is no sliding between the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3. Although the surgical efficiency is high at this time, the surgeon's surgical skills are relatively high. When the operation needs to ensure safety, a fastening screw 6 is also provided between the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3. The fastening screw 6 can be tightened to fix the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3 so that they cannot slide. The cutting pressure will not be transmitted to the constant force spring 42. Therefore, when the front end pressure of the ultrasonic bone knife head 1 suddenly decreases when cutting through the bone, the ultrasonic bone knife head 1 will not suddenly extend forward due to the rebound of the constant force spring 42, causing the ultrasonic bone knife head 1 to damage tissue that should not be damaged.

[0033] Example 3

[0034] like Figure 3 As shown, an embodiment of the present invention provides an ultrasonic bone knife handle with a force control device. Embodiment 3 is improved on the basis of Embodiment 2, and further includes a connecting and fixing structure b423 and a connecting and fixing structure c424, and the specific configuration is as follows:

[0035] The tail end of the ultrasonic bone knife handle sleeve 3 (the side close to the ultrasonic bone knife power supply cable 5) is completely open. The constant force spring 42 is fixed on the connection fixing structure c424, and the connection fixing structure c424 is connected and fixed to the ultrasonic bone knife handle 2. The constant force spring tension head end 421 is connected and fixed to the ultrasonic bone knife handle sleeve 3 through the connection fixing structure b423. The elastic force of the constant force spring 42 is the high value of the cutting pressure in the maximum cutting efficiency range. When the head end of the ultrasonic bone knife blade 1 is under pressure during operation and the pressure is lower than the elastic force of the constant force spring 42, the ultrasonic bone knife handle 2 will not slide in the ultrasonic bone knife handle sleeve 3; when the pressure is higher than the elastic force of the constant force spring 42, the constant force spring stretching head end 421 is stretched, and the ultrasonic bone knife handle 2 slides in the ultrasonic bone knife handle sleeve 3 (the surgeon can sense the high value of the cutting pressure in this maximum cutting efficiency range). The elastic force of the constant force spring 42 does not increase during the stretching process, so the cutting pressure at the head end of the ultrasonic bone knife blade 1 maintains the high value of the cutting pressure in the maximum cutting efficiency range. The surgeon senses the relative sliding of the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3 and knows that there is no need to increase the surgical pressure, and the relative sliding of the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3 does not continue to weaken the surgical cutting efficiency. The highest surgical cutting efficiency point for bone cutting is located at a pressure before the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3 slide relative to each other. When the operation needs to ensure safety, it must be ensured that there is no sliding between the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3. Although the surgical efficiency is high at this time, the surgeon's surgical skills are relatively high. When the operation needs to ensure safety, a fastening screw 6 is also provided between the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3. The fastening screw 6 can be tightened to fix the ultrasonic bone knife handle 2 and the ultrasonic bone knife handle sleeve 3 so that they cannot slide. The cutting pressure will not be transmitted to the constant force spring 42. Therefore, when the front end pressure of the ultrasonic bone knife head 1 suddenly decreases when cutting through the bone, the ultrasonic bone knife head 1 will not suddenly extend forward due to the rebound of the constant force spring 42, causing the ultrasonic bone knife head 1 to damage tissue that should not be damaged.

[0036] Example 4

[0037] In Example 4, for the same structure as in Examples 1, 2, and 3, the same description is omitted. Example 4 is improved on the basis of Examples 1, 2, and 3. The ultrasonic bone knife handle sliding sleeve 3 is designed to be symmetrically cut from the middle longitudinally, and can be opened and closed and directly fixed on the ultrasonic bone knife handle 2 and the ultrasonic bone knife power supply cable 5. It is particularly suitable for hospitals that have purchased ultrasonic bone knives to directly add a force control device. It is detachable and can enable doctors to quickly control the force size for the highest cutting efficiency, familiarize themselves with the different characteristics of ultrasonic bone knives and other equipment for bone cutting, and quickly master the best way to use ultrasonic bone knives. It is convenient for surgeons to become familiar with the force control of ultrasonic bone knives. Or it is only for doctors to remove and use after they are familiar with the force control of ultrasonic bone knives in the early stage (the handle design is more in line with biological characteristics).

[0038] Example 5

[0039] Example 5 is an improvement based on the design principles of Examples 1, 2, and 3. The ultrasonic bone knife handle sleeve 3 structure is eliminated, and the mobile sensing force control device is directly designed at the tail end of the ultrasonic bone knife handle 2 (the side away from the ultrasonic bone knife head 1), so that the ultrasonic transducer, the amplitude transformer and the ultrasonic bone knife head 1 in the ultrasonic bone knife handle 2 form a common integral structure. The integral structure can slide a certain distance with the ultrasonic bone knife handle 2 and is provided with a force control device. In this way, the surgeon's grip can be designed in a diversified manner, with a smaller size, which can be more in line with biological characteristics, making surgery easier for the surgeon.

[0040] Example 6

[0041] Embodiment 6 is an improvement on the design principles of Embodiments 1, 2, and 3, and the mobile sensing force control device uses a constant force spring combined with a compression spring.

[0042] The elastic force of the retractable section of the force control device using a constant force spring combined with a compression spring is located between a low cutting pressure value at a peak value of maximum cutting efficiency and a high cutting pressure value in a range of maximum cutting efficiency.

[0043] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An ultrasonic bone knife handle equipped with a force control device, characterized in that: It comprises an ultrasonic bone knife head (1), an ultrasonic bone knife handle (2), an ultrasonic bone knife handle sliding sleeve (3), a constant force spring (42) and a connecting and fixing structure a (422); The ultrasonic bone knife head (1) is mounted on the front end of the ultrasonic bone knife handle (2); the ultrasonic bone knife handle sliding sleeve (3) is slidably mounted outside the ultrasonic bone knife handle (2); and the front end of the ultrasonic bone knife handle sliding sleeve (3) is semi-closed; The tail end of the ultrasonic bone knife handle sleeve (3) is semi-closed, allowing the constant force spring tension head end (421) on the constant force spring (42), the connection fixing structure a (422) and the ultrasonic bone knife power supply cable (5) to enter and exit therein; the constant force spring (42) is fixed to the tube wall at the tail end of the ultrasonic bone knife handle sleeve (3); the connection fixing structure a (422) is fixed to the tail end of the ultrasonic bone knife handle (2) and is connected and fixed to the constant force spring tension head end (421); A fastening screw (6) is further provided between the ultrasonic bone knife handle (2) and the ultrasonic bone knife handle sliding sleeve (3); The elastic force of the constant force spring is a high value of the cutting pressure in the maximum cutting efficiency range.

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