Laminectomy ultrasonic surgical apparatus

Abstract

This invention discloses an ultrasonic surgical instrument for laminectomy, belonging to the field of medical device technology. It includes a handle, an ultrasonic housing, an ultrasonic bone scalpel assembly, and a follow-up sleeve. The handle is connected to the bottom of the ultrasonic housing, and the follow-up sleeve is connected to the front end of the ultrasonic housing. The follow-up sleeve is used to abut against the laminae and move synchronously with them. The ultrasonic bone scalpel assembly includes an ultrasonic scalpel handle and a bone scalpel connected to one end of the handle. The handle is installed inside the ultrasonic housing, and the bone scalpel is disposed inside the follow-up sleeve. The ultrasonic housing has a drive mechanism for driving the ultrasonic bone scalpel assembly to reciprocate linearly. When the follow-up sleeve abuts against the laminae, the drive mechanism drives the ultrasonic bone scalpel assembly to extend out of the follow-up sleeve to cut the laminae. This invention can achieve respiratory follow-up when the patient's breathing causes vertebral body movement, accurately completing the laminae cutting and ensuring no damage to the spinal cord / nerves beneath the laminae.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an ultrasonic surgical instrument for laminectomy. Background Technology

[0002] Laminectomy is a crucial step in spinal surgery, involving the surgical removal of the lamina to relieve spinal cord and nerve compression caused by spinal stenosis. The procedure presents three main clinical challenges: (1) From a surgical perspective, the selection of decompression sites and whether the incision penetrates the lamina depend heavily on the surgeon's experience, technique, and current condition, resulting in significant randomness; (2) From a spatial perspective, the small incision and limited surgical area make surgical tool access and manipulation difficult; (3) From a visual perspective, the small incision and soft tissue obstruction limit the surgeon's field of vision. Therefore, effectively reducing complications from decompression procedures and improving surgical safety and efficacy pose a significant challenge to spinal surgery (especially minimally invasive spinal surgery).

[0003] Intelligent devices such as navigation systems and robots are considered effective solutions to the challenges of spinal positioning procedures due to their high operational precision and ability to integrate medical images to provide doctors with multimodal surgical information. However, these positioning-oriented robotic technologies cannot meet the clinical requirements of spinal laminectomy: First, the positioning markers tracked by image-guided positioning robots are not installed on the vertebra to be operated on; breathing causes the vertebra to move up and down, and the positioning markers cannot accurately reflect the motion state of the vertebra to be operated on. Second, during decompression procedures, while the shape of rigid tissues such as the vertebrae changes, the external shape and relative position of soft tissues such as nerves also change, and image-guided positioning robots cannot identify and correct these changes. Therefore, it is necessary to design a laminectomy instrument that can move synchronously with breathing, allowing for accurate laminectomy without damaging the spinal cord / nerves beneath the laminectomy. Summary of the Invention

[0004] The purpose of this invention is to provide an ultrasonic surgical instrument for laminectomy to solve the problems existing in the prior art. It can follow the patient's breathing as the vertebral body moves, so as to accurately complete the laminectomy and ensure that the spinal cord / nerves under the laminectomy are not damaged.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides an ultrasonic surgical instrument for laminectomy, comprising a handle, an ultrasonic housing, an ultrasonic bone scalpel assembly, and a follower sleeve. The handle is connected to the bottom of the ultrasonic housing, and the follower sleeve is connected to the front end of the ultrasonic housing. The follower sleeve is used to abut against the laminectomy and move synchronously with the laminectomy. The ultrasonic bone scalpel assembly includes an ultrasonic scalpel handle and a bone scalpel connected to one end of the ultrasonic scalpel handle. The ultrasonic scalpel handle is installed inside the ultrasonic housing, and the bone scalpel is disposed inside the follower sleeve. The ultrasonic housing is provided with a drive mechanism for driving the ultrasonic bone scalpel assembly to reciprocate linearly. When the follower sleeve abuts against the laminectomy, the drive mechanism drives the ultrasonic bone scalpel assembly to extend out of the follower sleeve to cut the laminectomy.

[0007] Preferably, the ultrasonic housing is provided with a locking mechanism, and the ultrasonic scalpel handle is mounted on the locking mechanism. The locking mechanism includes a locking fixing member, a locking movable member, and a locking adjustment mechanism. The locking movable member is slidably connected to the locking fixing member. The locking movable member is provided with a first clamping member, and the locking fixing member is provided with a second clamping member corresponding to the first clamping member. The locking adjustment mechanism connects the locking movable member and the locking fixing member and is used to adjust the distance between the locking movable member and the locking fixing member, so that the first clamping member and the second clamping member move closer to each other to clamp the ultrasonic scalpel handle, or move the first clamping member away from the second clamping member to release the ultrasonic scalpel handle. The locking fixing member is connected to the driving mechanism, and the driving mechanism drives the locking mechanism to reciprocate linearly, thereby driving the ultrasonic bone scalpel assembly to reciprocate linearly.

[0008] Preferably, the locking adjustment mechanism includes a locking crank, a locking connecting rod, and a locking wrench. A shaft on one side of the locking crank is rotatably connected to the locking fixing member and fixedly connected to the locking wrench. A shaft on the other side of the locking crank is rotatably connected to one end of the locking connecting rod, and the other end of the locking connecting rod is rotatably connected to the locking movable member. The locking crank is driven to rotate by the locking wrench, which in turn causes the locking movable member to slide closer to or away from the locking fixing member via the locking connecting rod.

[0009] Preferably, the driving mechanism includes a base, a drive motor, a slide, a lead screw, and a lead screw nut. The base is fixedly connected inside the ultrasonic housing. The drive motor is fixedly connected to the base. The output shaft of the drive motor is connected to the lead screw to drive the lead screw to rotate. The lead screw nut is threaded onto the lead screw. The base is provided with a slide rail, and a slider is slidably connected to the slide rail. The slide is fixedly connected to the slider and to the lead screw nut. The locking fastener is slidably connected to the slide. Force sensor mounting seats are fixedly connected to the inner sides of both ends of the locking fastener. Each force sensor mounting seat contains a force sensor. Two force sensors abut against both ends of the slide to measure the cutting force.

[0010] Preferably, a limit switch is provided at each end of the base, and each limit switch is used in conjunction with the two ends of the locking fastener to limit the movement stroke of the drive motor.

[0011] Preferably, the drive motor is a screw motor, and the cutting depth of the current tissue is calculated by the encoder built into the screw motor.

[0012] Preferably, the handle is provided with a self-resetting forward button, a self-resetting backward button, and a self-resetting autonomous recognition button. The self-resetting forward button, the self-resetting backward button, and the self-resetting autonomous recognition button are respectively connected to the controller. The forward and reverse rotation of the drive motor is controlled by the self-resetting forward button and the self-resetting backward button to control the forward and backward movement of the bone cutter. The self-resetting autonomous recognition button controls the bone cutter to automatically cut the vertebral laminae.

[0013] Preferably, the ultrasonic housing is equipped with a display screen for displaying relevant parameters during laminectomy.

[0014] Preferably, the ultrasonic housing includes a top ultrasonic housing and a bottom ultrasonic housing. Both the top and bottom ultrasonic housings are provided with housing adsorption magnets, which connect the two together through the magnetic attraction of the housing adsorption magnets. A sleeve adsorption magnet is fixedly provided at the front end of the bottom ultrasonic housing. A ferromagnetic component corresponding to the sleeve adsorption magnet is fixedly provided on the follower sleeve, and the two are connected together through the magnetic attraction between the sleeve adsorption magnet and the ferromagnetic component.

[0015] Preferably, the top of the handle is provided with a slot, the bottom of the ultrasonic housing is provided with a plug that mates with the slot, and a cam mechanism is rotatably connected to the handle. When the plug is inserted into the slot, the cam mechanism is rotated to press against the bottom surface of the ultrasonic housing, thus tightly connecting the plug with the slot.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] This invention provides an ultrasonic surgical instrument for laminectomy. By placing a bone scalpel inside a follower sleeve, the follower sleeve is placed against the vertebral plate during laminectomy. Under the action of gravity and the pressure of the surgeon's hand, the relative position of the follower sleeve and the vertebral body remains fixed. Thus, when the vertebral body rises and falls due to the patient's breathing, the follower sleeve moves synchronously with the vertebral body, achieving respiratory follow-up. This allows for accurate laminectomy through the ultrasonic bone scalpel assembly, ensuring that the spinal cord / nerves under the vertebral plate are not damaged. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural schematic diagram of the ultrasonic surgical instrument for laminectomy provided by the present invention;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the laminectomy ultrasonic surgical instrument provided by the present invention from another perspective.

[0021] Figure 3 This is a front view of the ultrasonic surgical instrument for laminectomy provided by the present invention.

[0022] Figure 4 This is a top view of the ultrasonic surgical instrument for laminectomy provided by the present invention.

[0023] Figure 5 This is a schematic diagram showing the structural connections of the ultrasonic bone scalpel assembly, locking mechanism, and driving mechanism in this invention;

[0024] Figure 6 This is a schematic diagram of the locking mechanism in this invention;

[0025] Figure 7 for Figure 2 A magnified view of part A in the middle;

[0026] In the diagram: 1-Handle, 2-Ultrasound housing, 3-Ultrasound bone scalpel assembly, 4-Follow-up sleeve, 5-Ultrasound scalpel handle, 6-Bone scalpel, 7-Locking fastener, 8-Locking movable part, 9-First clamping part, 10-Second clamping part, 11-Locking crank, 12-Locking connecting rod, 13-Locking wrench, 14-Base, 15-Drive motor, 16-Slide table, 17-Lead screw, 18-Lead screw nut, 19-Slide rail, 20-Slider, 21-Limit switch, 22-Force sensor mounting base, 23-Force sensor, 24-Self-reset forward button, 25-Self-reset backward button, 26-Self-reset self-identification button, 27-Display screen, 28-Top ultrasound housing, 29-Bottom ultrasound housing, 30-Slot, 31-Insertion block, 32-Cam mechanism, 33-Slender guide rail. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The purpose of this invention is to provide an ultrasonic surgical instrument for laminectomy to solve the problems existing in the prior art. It can follow the patient's breathing to accurately complete the laminectomy and ensure that the spinal cord / nerves under the laminectomy are not damaged.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1-7 As shown, this embodiment provides an ultrasonic surgical instrument for laminectomy, including a handle 1, an ultrasonic housing 2, an ultrasonic bone scalpel assembly 3, and a follower sleeve 4. The handle 1 is connected to the bottom of the ultrasonic housing 2, and the follower sleeve 4 is connected to the front end of the ultrasonic housing 2. The follower sleeve 4 is used to abut against the laminectomy and move synchronously with the laminectomy. The ultrasonic bone scalpel assembly 3 includes an ultrasonic scalpel handle 5 and a bone scalpel 6 connected to one end of the ultrasonic scalpel handle 5. The ultrasonic scalpel handle 5 is installed inside the ultrasonic housing 2, and the bone scalpel 6 is disposed inside the follower sleeve 4. The ultrasonic housing 2 is provided with a drive mechanism for driving the ultrasonic bone scalpel assembly 3 to reciprocate linearly. When the follower sleeve 4 abuts against the laminectomy, the drive mechanism drives the ultrasonic bone scalpel assembly 3 to extend out of the follower sleeve 4 to cut the laminectomy.

[0031] During laminectomy, the follower sleeve 4 is placed against the vertebral plate. Under the action of gravity and the pressure of the doctor's hand, the relative position of the follower sleeve 4 and the vertebral body remains fixed. Thus, when the patient breathes and the vertebral body rises and falls, the follower sleeve 4 moves synchronously with the vertebral body, thereby realizing the overall breathing follow-up of the instrument. This allows for accurate laminectomy through the ultrasonic bone scalpel assembly, ensuring that the spinal cord / nerves under the vertebral plate are not damaged.

[0032] In this embodiment, a locking mechanism is provided inside the ultrasonic housing 2. The ultrasonic scalpel handle 5 is mounted on the locking mechanism. The locking mechanism includes a locking fixing member 7, a locking movable member 8, and a locking adjustment mechanism. The locking movable member 8 is slidably connected to the locking fixing member 7. A first clamping member 9 is provided on the locking movable member 8, and a second clamping member 10 corresponding to the first clamping member 9 is provided on the locking fixing member 7. The locking adjustment mechanism connects the locking movable member 8 and the locking fixing member 7 and is used to adjust the distance between the locking movable member 8 and the locking fixing member 7 so that the first clamping member 9 and the second clamping member 10 move closer to each other to clamp the ultrasonic scalpel handle 5, or move the first clamping member 9 away from the second clamping member 10 to release the ultrasonic scalpel handle 5. The locking fixing member 7 is connected to a drive mechanism, which drives the locking mechanism to reciprocate linearly, thereby driving the ultrasonic bone scalpel assembly 3 to reciprocate linearly. Adjusting the distance between the locking movable member 8 and the locking fixing member 7 through the locking adjustment mechanism facilitates the installation and removal of the ultrasonic scalpel handle 5.

[0033] In this embodiment, the locking adjustment mechanism includes a locking crank 11, a locking connecting rod 12, and a locking wrench 13. One side of the locking crank 11 is rotatably connected to the locking fixing member 7 and fixedly connected to the locking wrench 13. The other side of the locking crank 11 is rotatably connected to one end of the locking connecting rod 12, and the other end of the locking connecting rod 12 is rotatably connected to the locking movable member 8. The locking crank 11 is driven to rotate by the locking wrench 13, which in turn causes the locking movable member 8 to slide closer to or further away from the locking fixing member 7 via the locking connecting rod 12. During adjustment, no other tools are needed; the ultrasonic scalpel handle 5 can be installed and removed using the locking wrench 13, making installation and removal convenient and quick.

[0034] In this embodiment, the driving mechanism includes a base 14, a drive motor 15, a slide 16, a lead screw 17, and a lead screw nut 18. The base 14 is fixedly connected inside the ultrasonic housing 2. The drive motor 15 is fixedly connected to the base 14. The output shaft of the drive motor 15 is connected to the lead screw 17 to drive the lead screw 17 to rotate. The lead screw nut 18 is threadedly connected to the lead screw 17. The base 14 is provided with a slide rail 19. A slider 20 is slidably connected to the slide rail 19. The slide 16 is fixedly connected to the slider 20 and to the lead screw nut 18. The locking fastener 7 is slidably connected to the slide 16. Force sensor mounting seats 22 are fixedly connected to the inner sides of both ends of the locking fastener 7. Each force sensor mounting seat 22 is provided with a force sensor 23. The two force sensors 23 abut against the two ends of the slide 16 respectively to measure the cutting force through the force sensors 23. Two force sensors 23 restrict the position of the locking fastener 7, allowing it to move with the slide table 16. The locking fastener 7 is slidably connected to the slender guide rail 33 on the slide table 16, and can have slight displacement along the slender guide rail 33. The two force sensors 23, while transmitting motion, can simultaneously measure the relative force between the locking fastener 7 and the slide table 16 through minute deformation. The drive motor 15 drives the lead screw 17 to rotate, which in turn drives the slide table 16 and the slider 20 to move linearly along the slide rail 19 via the lead screw nut 18, thus achieving linear movement of the locking fastener 7 and the ultrasonic scalpel handle 5 mounted on it.

[0035] In this embodiment, a limit switch 21 is provided at each end of the base 14. Each limit switch 21 is used in conjunction with the two ends of the locking fastener 7 to limit the movement stroke of the drive motor 15.

[0036] In this embodiment, the drive motor 15 is a screw motor, and the cutting depth of the current tissue is calculated by the encoder built into the screw motor; by real-time monitoring of the cutting depth and the magnitude of the cutting force, the safety and thoroughness of the vertebral plate cutting can be ensured.

[0037] In this embodiment, the handle 1 is equipped with a self-resetting forward button 24, a self-resetting backward button 25, and a self-resetting autonomous recognition button 26. These buttons are connected to the controller. The forward and reverse rotations of the drive motor 15, controlled by the forward and backward buttons 24 and 25, respectively, control the forward and backward movement of the bone cutter 6. The self-resetting autonomous recognition button 26 controls the bone cutter 6 to automatically cut the vertebral laminae. The self-resetting autonomous recognition button 26 activates the autonomous recognition and resection function, i.e., the automatic cutting and retraction function: when pressed, the drive motor 15 drives the bone cutter 6 forward. When it contacts the bone, the force sensor 23 changes value. After the algorithm recognizes this, it changes the motor's motion mode to a reciprocating cutting mode until the bone cutter 6 is about to penetrate the bone. At this point, the algorithm again recognizes the key information from the force sensor 23 value, and the motor automatically retracts.

[0038] In this embodiment, a display screen 27 is installed on the ultrasonic housing 2 to display relevant parameters during lamina cutting, such as cutting depth and cutting force.

[0039] In this embodiment, the ultrasonic housing 2 includes a top ultrasonic housing 28 and a bottom ultrasonic housing 29. Both the top and bottom ultrasonic housings 28 and 29 are equipped with housing magnets, which connect them together through magnetic attraction. A sleeve magnet is fixedly installed at the front end of the bottom ultrasonic housing 29, and a ferromagnetic component corresponding to the sleeve magnet is fixedly installed on the follower sleeve 4. The two are connected together through magnetic attraction between the sleeve magnet and the ferromagnetic component. This magnetic connection method allows for convenient and quick assembly and disassembly.

[0040] In this embodiment, the handle 1 has a slot 30 at its top and an insert 31 that mates with the slot 30 at its bottom. A cam mechanism 32 is also rotatably connected to the handle 1. When the insert 31 is inserted into the slot 30, the cam mechanism 32 is rotated to press against the bottom surface of the ultrasonic housing 2, thus tightly connecting the insert 31 to the slot 30. This design allows for quick and easy assembly and disassembly, facilitating the replacement of different ergonomic handles to meet the needs and personal preferences of different surgeons, thereby improving flexibility. The handle can also be mounted on clamping mechanisms such as robotic arms. The handle 1 is designed with a 70° angle to the bone cutter 6. This design converts the operator's hand weight into pressure from the handheld cutting system during surgery, ensuring cutting efficiency, and also enhances operator comfort.

[0041] The ultrasonic bone scalpel assembly 3 of this invention uses a crank-connecting rod mechanism for locking and releasing, eliminating the need for other tools and facilitating quick installation and disassembly by the operator. It can also be installed through a sterile sleeve. The follower sleeve 4 uses a magnetic installation method, similarly allowing for quick installation and disassembly through a sterile sleeve. This design is beneficial for meeting the sterility requirements of different levels of hospitals and animal experimental environments. If the hospital supports low-temperature sterilization methods such as ethylene oxide or plasma sterilization, the entire assembly can be sterilized after installation. If the hospital or animal experimental facility does not support low-temperature sterilization, a sterile sleeve isolation method can be used, wrapping both the ultrasonic shell 2 and the handle 1 with a sterile sleeve. The bone scalpel 6 and the follower sleeve 4 are then quickly installed on the outside of the sterile sleeve after high-temperature sterilization. It should be noted that if a sterile sleeve isolation method is used, the top ultrasonic shell 28 is not installed to prevent the sterile sleeve from being pulled, which could affect the accuracy of the measurement.

[0042] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An ultrasonic surgical instrument for laminectomy, characterized in that: The device includes a handle, an ultrasonic housing, an ultrasonic bone scalpel assembly, and a follower sleeve. The handle is connected to the bottom of the ultrasonic housing, and the follower sleeve is connected to the front end of the ultrasonic housing. The follower sleeve is used to abut against the vertebral lamina and move synchronously with the vertebral lamina. The ultrasonic bone scalpel assembly includes an ultrasonic scalpel handle and a bone scalpel connected to one end of the ultrasonic scalpel handle. The ultrasonic scalpel handle is installed inside the ultrasonic housing, and the bone scalpel is disposed inside the follower sleeve. The ultrasonic housing is provided with a drive mechanism for driving the ultrasonic bone scalpel assembly to reciprocate linearly. When the follower sleeve abuts against the vertebral lamina, the drive mechanism drives the ultrasonic bone scalpel assembly to extend out of the follower sleeve to cut the vertebral lamina. The ultrasonic housing is equipped with a locking mechanism, and the ultrasonic scalpel handle is mounted on the locking mechanism. The locking mechanism includes a locking fixing member, a locking movable member, and a locking adjustment mechanism. The locking movable member is slidably connected to the locking fixing member. The locking movable member is provided with a first clamping member, and the locking fixing member is provided with a second clamping member corresponding to the first clamping member. The locking adjustment mechanism connects the locking movable member and the locking fixing member and is used to adjust the distance between the locking movable member and the locking fixing member, so that the first clamping member and the second clamping member move closer to each other to clamp the ultrasonic scalpel handle, or move the first clamping member away from the second clamping member to release the ultrasonic scalpel handle. The locking fixing member is connected to the driving mechanism, which drives the locking mechanism to reciprocate linearly, thereby driving the ultrasonic bone scalpel assembly to reciprocate linearly. The driving mechanism includes a base, a drive motor, a slide table, a lead screw, and a lead screw nut. The base is fixedly connected inside the ultrasonic housing. The drive motor is fixedly connected to the base. The output shaft of the drive motor is connected to the lead screw to drive the lead screw to rotate. The lead screw nut is threaded onto the lead screw. The base is provided with a slide rail, and a slider is slidably connected to the slide rail. The slide table is fixedly connected to the slider and to the lead screw nut. The locking fastener is slidably connected to the slide table. Force sensor mounting seats are fixedly connected to the inner sides of both ends of the locking fastener. Each force sensor mounting seat contains a force sensor. Two force sensors abut against both ends of the slide table to measure the cutting force. The handle is equipped with a self-resetting forward button, a self-resetting backward button, and a self-resetting autonomous recognition button. The self-resetting forward button, the self-resetting backward button, and the self-resetting autonomous recognition button are respectively connected to the controller. The forward and backward rotation of the drive motor is controlled by the self-resetting forward button and the self-resetting backward button, respectively, to control the forward and backward movement of the bone cutter. The self-resetting autonomous recognition button controls the bone cutter to automatically cut the vertebral laminae.

2. The ultrasonic surgical instrument for laminectomy according to claim 1, characterized in that: The locking adjustment mechanism includes a locking crank, a locking connecting rod, and a locking wrench. A shaft on one side of the locking crank is rotatably connected to the locking fixing member and fixedly connected to the locking wrench. A shaft on the other side of the locking crank is rotatably connected to one end of the locking connecting rod, and the other end of the locking connecting rod is rotatably connected to the locking movable member. The locking crank is driven to rotate by the locking wrench, which in turn causes the locking movable member to slide closer to or away from the locking fixing member via the locking connecting rod.

3. The ultrasonic surgical instrument for laminectomy according to claim 1, characterized in that: Each end of the base is provided with a limit switch, and each limit switch is used in conjunction with the two ends of the locking fastener to limit the movement stroke of the drive motor.

4. The ultrasonic surgical instrument for laminectomy according to claim 1, characterized in that: The drive motor is a screw motor, and the cutting depth of the current tissue is calculated by the encoder built into the drive motor.

5. The ultrasonic surgical instrument for laminectomy according to claim 1, characterized in that: The ultrasonic housing is equipped with a display screen to show relevant parameters during laminectomy.

6. The ultrasonic surgical instrument for laminectomy according to claim 1, characterized in that: The ultrasonic housing includes a top ultrasonic housing and a bottom ultrasonic housing. Both the top and bottom ultrasonic housings are equipped with housing magnets, which connect the two together through the magnetic attraction of the housing magnets. A sleeve magnet is fixedly provided at the front end of the bottom ultrasonic housing. A ferromagnetic component corresponding to the sleeve magnet is fixedly provided on the follower sleeve, and the two are connected together through the magnetic attraction between the sleeve magnet and the ferromagnetic component.

7. The ultrasonic surgical instrument for laminectomy according to claim 1, characterized in that: The handle has a slot at the top and an insert block that mates with the slot at the bottom. A cam mechanism is also rotatably connected to the handle. When the insert block is inserted into the slot, the cam mechanism is rotated to press against the bottom surface of the ultrasonic housing, thus tightly connecting the insert block to the slot.

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