A bone drill feed control device for craniotomies

Abstract

The application discloses a bone drill feeding amount control device for craniotomy, which comprises a symmetrical base, an arc-shaped track installed on the base, and the feeding amount control device slidingly arranged on the arc-shaped track, a second clamping assembly on the arc-shaped track, an adjusting mechanism fixedly arranged on the second clamping assembly, and an electric drill for drilling bone drivenly connected with the adjusting mechanism, and a guide rod arranged between the second clamping assembly and the electric drill, so that the electric drill always reciprocally slides along the guide rod under the action of the adjusting mechanism. The electric drill can be deflected on the foot side of the patient's head and deflected left and right through the simple screw rod mechanism and the arc-shaped track, and various required angles are met, so that the drilling angles in the existing craniotomy can be effectively fixed, and the drilling head feeding amount can be arbitrarily controlled at any time through the adjusting mechanism, and the brain tissue damage caused by drilling inertia is eliminated.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to the field of medical device auxiliary devices commonly used in orthopedics and neurosurgery, specifically a bone drill feed control device for craniotomy. Background Technology

[0002] A bone drill is a commonly used medical instrument in surgical procedures involving bone. Its main function is to create holes in specific locations in the bone to facilitate the subsequent insertion of screws or interventional procedures. However, bone drills are currently operated primarily by hand by the surgeon. Because bone is quite hard, a certain amount of positive pressure needs to be applied to the drill to effectively penetrate it. This inevitably introduces a new surgical risk: when the drill is about to penetrate the bone, the surgeon cannot precisely control the timing, making it very easy for the drill bit to damage soft tissues or organs on the other side of the bone. Current techniques typically address this issue by having experienced surgeons operate the drill to minimize secondary injury. However, even so, manual operation with a bone drill can still damage intact tissues or organs. In craniotomy, this can have significant consequences, potentially leading to irreversible brain damage. Therefore, precisely controlling the feed rate of the bone drill is crucial for reducing or eliminating the risk of secondary surgical trauma for patients, providing effective protection. Summary of the Invention

[0003] To address the problem that bone drills in existing technologies can easily damage surrounding intact tissues or organs, this application provides a bone drill feed control device for craniotomy. This device precisely controls and limits the feed rate of the bone drill, eliminates the drilling inertia of the bone drill, and prevents the drill bit from damaging intact tissues or other organs due to the inertia when the bone is suddenly drilled through during the drilling process, thus avoiding secondary injury or even irreversible damage to the patient.

[0004] The skull is arguably the most dangerous surgical site, containing primarily brain tissue. If a bone drill penetrates the skull, the drill bit will directly cause irreversible and severe damage to the brain tissue. Therefore, in such cases, doctors generally adopt a more cautious approach: removing part of the skull for surgery. While this method can mitigate brain tissue damage caused by improper drill control to some extent, it significantly increases skull trauma, drastically reducing the healing process and the protective strength of the brain tissue. For craniotomies that can be performed with minimally invasive or small-incision interventions, a device capable of precisely controlling the bone drill is needed to avoid brain tissue damage or unnecessary expansion of the skull wound.

[0005] To achieve the above objectives, this application provides a bone drill feed control device for craniotomy, based on existing clinical practice, to achieve drilling of small incisions in the skull. The specific technical solution adopted is as follows:

[0006] A bone drill feed control device for craniotomy includes a base symmetrically arranged on both sides of an operating table and detachably fixedly connected to the operating table; an arc-shaped track mounted transversely on the base along the operating table to support the feed control device; and the feed control device slidably arranged on the arc-shaped track. The feed control device includes a second clamping assembly lockably slidably arranged on the arc-shaped track, and an adjustment mechanism fixedly arranged on the second clamping assembly. The adjustment mechanism drives an electric drill for drilling bone. A guide rod is also provided between the second clamping assembly and the electric drill to limit the movement trajectory of the electric drill, so that the electric drill always slides back and forth along the guide rod under the action of the adjustment mechanism.

[0007] To facilitate the adjustment of the drill's travel distance and ensure precise control, the adjustment mechanism preferably includes a drill support fixedly connected to the drill housing, a lead screw fixedly connected to the drill support and arranged parallel to the guide rod, a lead screw driving a lead sleeve gear, a drive gear meshing with the lead sleeve gear, and an adjustment disc coaxially fixedly connected to the drive gear.

[0008] More preferably, a scale parallel to the lead screw is provided between the second clamping assembly and the drill support, one end of the scale is fixedly connected to the second clamping assembly, and a displacement sensor for reading the relative displacement between the drill support and the scale, and a display screen for displaying the relative displacement are provided inside the drill support.

[0009] In a further preferred embodiment, the scale is provided with graduations and a limiter slidably disposed on the outer wall of the scale, the limiter being provided with a second locking device for fixing the relative position of the limiter and the scale.

[0010] To facilitate the movement of the electric drill while ensuring stability and structural layout, preferably, a first sleeve is slidably mounted on the guide rod, and the first sleeve is fixedly connected to an electric drill bracket for mounting the electric drill.

[0011] To improve the strength of the arc track and avoid the problem of insufficient support strength leading to elastic deformation and reduced stability when the arc track is tilted, preferably, the arc track includes a first arc track and a second arc track arranged in parallel and fixedly connected to each other, and the second clamping component is slidably connected to the first arc track and the second arc track respectively.

[0012] In a further preferred embodiment, the base is provided with a sliding groove, and both ends of the arc-shaped track are slidably connected to the base via slide rails installed in the sliding groove. Each end of the arc-shaped track is hinged to the slide rail. A retractable support mechanism for changing and supporting different angles of the arc-shaped track is also provided between the slide rail and the arc-shaped track.

[0013] To facilitate flexible angle adjustment during surgery, preferably, the support mechanism includes a first clamping assembly that can be locked and slidably disposed on the arc-shaped track, a telescopic rod for connecting the first clamping assembly and the slide rail, a first spherical seat and a second spherical seat respectively provided at both ends of the telescopic rod, and a first locking device for fixing the telescopic rod in its telescopic state.

[0014] Beneficial effects:

[0015] This invention enables the electric drill to deflect to the head and feet and to the left and right sides using a simple lead screw mechanism and arc track, satisfying various required angles. This allows for effective fixation of the drilling angle in existing craniectomy procedures. At the same time, the adjustment mechanism allows for arbitrary control of the drill bit feed and can be stopped at any time, eliminating the problem of brain tissue damage caused by drilling inertia. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the present invention in use.

[0018] Figure 2 yes Figure 1 Enlarged view of the structure in area A.

[0019] Figure 3 yes Figure 1 The main view.

[0020] Figure 4 yes Figure 3 A sectional view of the section symbol BB.

[0021] Figure 5 yes Figure 4 Enlarged view of the structure in the C region.

[0022] Figure 6 yes Figure 1 Another visual axonometric drawing.

[0023] In the diagram: 1-Base; 2-Slide groove; 3-Slide rail; 4-First spherical seat; 5-Telescopic rod; 6-First locking device; 7-Second spherical seat; 8-First clamping assembly; 9-Arc-shaped track; 91-First arc-shaped rail; 92-Second arc-shaped rail; 10-Second clamping assembly; 11-Guide rod; 12-First sleeve; 13-Electric drill bracket; 14-Electric drill; 15-Drill rod; 16-Second sleeve; 17-Adjusting mechanism; 18-Threaded sleeve gear; 19-Drive gear; 20-Adjusting disc; 21-Threaded rod; 22-Electric drill support; 23-Display screen; 24-Scale; 25-Limiter; 26-Second locking device. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Example 1:

[0031] Refer to the instruction manual. Figures 1-6 The illustrated bone drill feed control device for craniotomy includes a base 1 symmetrically arranged on both sides of the operating table and detachably fixedly connected to the operating table; an arc-shaped track 9 mounted transversely on the base 1 to support the feed control device; and the feed control device slidably arranged on the arc-shaped track 9. The feed control device includes a second clamping assembly 10 lockably slidably arranged on the arc-shaped track 9; and an adjustment mechanism 17 fixedly arranged on the second clamping assembly 10. The adjustment mechanism 17 drives and connects to an electric drill 14 for drilling bone. A guide rod 11 is also provided between the second clamping assembly 10 and the electric drill 14 to limit the movement trajectory of the electric drill 14, so that the electric drill 14 always slides back and forth along the guide rod 11 under the action of the adjustment mechanism 17.

[0032] Working and structural principles:

[0033] The bone drill feed control device provided in this embodiment is mounted on the operating table via a base 1. Since operating tables vary in size and thickness, the structure of the base 1 can be adapted to the structure of the operating table. This is not the focus of this improvement; it can be implemented based on existing technology, such as a retractable clamping structure, etc., which will not be listed here. The arc-shaped track 9 is as follows... Figure 1 and Figure 6As shown, the patient's head is positioned below the arc-shaped track 9, spanning the width of the entire operating table. Since different patients require different locations and directions for cranial openings, the drill rod 15 mounted on the drill 14 can be adjusted at different angles by changing the patient's surgical position or the position of the drill 14 on the arc-shaped track 9. Because the second clamping assembly 10 is slidably mounted on the arc-shaped track 9 and can be locked at any position, it can be customized within the sliding range of the arc-shaped track 9 to accommodate drilling at any angle in the vertical plane. If the patient's surgical site is at the back of the head, this can be achieved by adjusting the patient's surgical position. The adjustment mechanism 17 allows for manual adjustment by the doctor to advance the drill. When the doctor does not operate the adjustment mechanism 17, the drill rod 15 mounted on the drill 14 will not feed, preventing any harm to the patient. Simultaneously, during drilling, the adjustment mechanism 17 can be operated at any time to retract the drill 14, allowing real-time observation of the cranial drilling progress and preventing excessive drilling that could damage the brain.

[0034] Example 2:

[0035] To facilitate precise and controllable adjustment of the drilling 14's movement distance, this embodiment further improves upon Embodiment 1, balancing ease of operation and precise control. The drilling 14 is advanced using a micro-feed method, resulting in a significantly lower feed rate and speed for the drill rod 15 compared to existing handheld drilling systems. Specifically, the adjustment mechanism 17 includes a drilling support 22 fixedly connected to the outer casing of the drilling 14, a lead screw 21 fixedly connected to the drilling support 22 and parallel to the guide rod 11, a lead screw 21 driving a threaded gear 18, a drive gear 19 meshing with the threaded gear 18, and an adjustment disc 20 coaxially fixedly connected to the drive gear 19. During the drilling operation, the doctor manually rotates the adjustment disc 20, which slows down the speed by engaging the drive gear 19 with the threaded sleeve gear 18. Through the threaded engagement of the lead screw 21, the feed of the drill rod 15 is only about 0.5mm for each rotation of the adjustment disc 20. Slow or intermittent rotation of the adjustment disc 20 can control the feed even lower, preventing any inertial drilling through, thus achieving precise control and avoiding damage to brain tissue.

[0036] Because current craniocerebral surgeries typically involve precise CT and MRI tomographic modeling to obtain the thickness of the skull and cortex at the surgical site, this embodiment includes a scale 24 parallel to the lead screw 21 between the second clamping assembly 10 and the drill support 22 for accurate matching and intuitive observation. One end of the scale 24 is fixedly connected to the second clamping assembly 10. The drill support 22 contains a displacement sensor for reading the relative displacement between the drill support 22 and the scale 24, and a display screen 23 for displaying the relative displacement. During each drilling operation, to prevent the feed rate from exceeding a preset safety value, the displacement sensor accurately reads the displacement, thus alerting the surgeon to the critical point where the skull is about to be drilled through, preventing damage to brain tissue due to excessive feed rate.

[0037] Furthermore, in this embodiment, the scale 24 is provided with graduations, and a limiter 25 is slidably disposed on the outer wall of the scale 24. The limiter 25 is provided with a second locking device 26 for fixing the relative position of the limiter 25 and the scale 24. The function of the limiter 25 and the second locking device 26 is to limit the preset safety value in advance to avoid excessive feed due to operational errors; when the feed reaches the preset value, the drill support 22 and the limiter 25 will come into contact, preventing further movement, thereby achieving a protective function.

[0038] To facilitate the movement of the electric drill 14 while ensuring stability and structural layout, this embodiment also includes a first sleeve 12 slidably disposed on the guide rod 11. The first sleeve 12 is fixedly connected to an electric drill bracket 13 for mounting the electric drill 14.

[0039] In order to improve the strength of the arc track 9 and avoid the problem of insufficient support strength of the arc track 9 when it is in an inclined state, resulting in elastic deformation and reduced stability, preferably, the arc track 9 includes a first arc track 91 and a second arc track 92 that are arranged in parallel and fixedly connected to each other, and the second clamping component 10 is slidably connected to the first arc track 91 and the second arc track 92 respectively.

[0040] Example 3:

[0041] Based on the above embodiment 2, and further in conjunction with the appendix to the specification... Figure 1 and Figure 6 As shown, a sliding groove 2 is provided on the base 1, and both ends of the arc-shaped track 9 are slidably connected to the base 1 through a sliding rail 3 installed in the sliding groove 2. Each end of the arc-shaped track 9 is hinged to the sliding rail 3. A retractable support mechanism for changing and supporting different angles of the arc-shaped track 9 is also provided between the sliding rail 3 and the arc-shaped track 9.

[0042] To facilitate flexible angle adjustment during surgery, preferably, the support mechanism includes a first clamping assembly 8 that can be locked and slidably disposed on the arc-shaped track 9, a telescopic rod 5 for connecting the first clamping assembly 8 and the slide rail 3, a first spherical seat 4 and a second spherical seat 7 respectively provided at both ends of the telescopic rod 5, and a first locking device 6 for fixing the telescopic rod 5 in the telescopic state.

[0043] When adjustment is required, firstly, simultaneously release the first locking device 6 and the first clamping assembly 8, allowing the telescopic rod 5 to extend and retract freely, and the first clamping assembly 8 to slide freely. At this time, since the arc-shaped track 9 is hinged to the slide rails 3 installed on both sides of the operating table, it can be tilted and deflected on the head and foot sides. When the deflection angle reaches the surgical angle, fix the first locking device 6 and the first clamping assembly 8, so that the state of the entire device is fixed to meet the different angle requirements during actual surgery.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bone drill feed rate control device for craniotomy, characterized in that: The device includes a base (1) symmetrically arranged on both sides of the operating table and detachably fixedly connected to the operating table; an arc-shaped track (9) mounted on the base (1) along the side of the operating table to support the feed control device; and the feed control device slidably arranged on the arc-shaped track (9). The feed control device includes a second clamping assembly (10) lockably slidably arranged on the arc-shaped track (9); and an adjustment mechanism (17) fixedly arranged on the second clamping assembly (10). The adjustment mechanism (17) drives and connects to an electric drill (14) for drilling bone. A guide rod (11) is also provided between the second clamping assembly (10) and the electric drill (14) to limit the movement trajectory of the electric drill (14), so that the electric drill (14) always slides back and forth along the guide rod (11) under the action of the adjustment mechanism (17). The adjustment mechanism (17) includes a drill support (22) fixedly connected to the outer shell of the drill (14), a lead screw (21) fixedly connected to the drill support (22) and arranged parallel to the guide rod (11), the lead screw (21) being driven by a threaded gear (18), a drive gear (19) meshing with the threaded gear (18), and an adjustment disc (20) being coaxially fixedly connected to the drive gear (19). A scale (24) is provided between the second central holding assembly (10) and the electric drill support (22) and is parallel to the lead screw (21). One end of the scale (24) is fixedly connected to the second clamping assembly (10). The electric drill support (22) is provided with a displacement sensor for reading the relative displacement between the electric drill support (22) and the scale (24) and a display screen (23) for displaying the relative displacement.

2. The bone drill feed control device for craniotomy according to claim 1, characterized in that: The scale (24) is provided with graduations and a limiter (25) is slidably provided on the outer wall of the scale (24). The limiter (25) is provided with a second locking device (26) for fixing the relative position of the limiter (25) and the scale (24).

3. A bone drill feed control device for craniotomy according to claim 1 or 2, characterized in that: It also includes a first sleeve (12) that is slidably disposed on the guide rod (11), and the first sleeve (12) is fixedly connected to a drill bracket (13) for mounting the electric drill (14).

4. The bone drill feed rate control device for craniotomy according to claim 3, characterized in that: The arc track (9) includes a first arc track (91) and a second arc track (92) that are arranged in parallel and fixedly connected to each other. The second clamping component (10) is slidably connected to the first arc track (91) and the second arc track (92) respectively.

5. The bone drill feed control device for craniotomy according to claim 4, characterized in that: The base (1) is provided with a slide groove (2). Both ends of the arc track (9) are slidably connected to the base (1) through slide rails (3) installed in the slide groove (2). Each end of the arc track (9) is hinged to the slide rail (3). A retractable support mechanism for changing and supporting different angles of the arc track (9) is also provided between the slide rail (3) and the arc track (9).

6. The bone drill feed rate control device for craniotomy according to claim 5, characterized in that: The support mechanism includes a first clamping assembly (8) lockably slidably mounted on the arc-shaped track (9), a telescopic rod (5) for connecting the first clamping assembly (8) and the slide rail (3), a first spherical seat (4) and a second spherical seat (7) respectively provided at both ends of the telescopic rod (5), and a first locking device (6) for fixing the telescopic rod (5) in the telescopic state.

Images