CN219070508U - Skull drill - Google Patents

Abstract

The utility model relates to a skull drill, skull drill has drill bit main part and stop device, drill bit main part has shaft-like section and the drill bit section that follows the shaft-like section, be equipped with spacing screw thread on the shaft-like section, stop device has spacing sleeve and locking sleeve, be equipped with on the inner wall of spacing sleeve with spacing screw thread complex first mating thread, be equipped with on the inner wall of locking sleeve with spacing screw thread complex second mating thread, the spacing sleeve can be screwed for the first end of spacing sleeve towards the drill bit section reaches expected preset position, the first end of spacing sleeve constitutes limit stop, and the locking sleeve can be screwed, make the first end of locking sleeve towards spacing sleeve compress tightly the second end of spacing sleeve towards the locking sleeve, thereby make the first end of spacing sleeve keep on expected preset position. The skull drill has the advantages of stable drilling, rapidness, safety, small secondary injury and easiness in controlling the drilling depth.

Description

Skull drill

Technical Field

The present application relates to the field of medical instruments, and more particularly to a cranial drill.

Background

In modern society, hypertensive cerebral hemorrhage is a disease with high mortality and disability rate in cerebrovascular diseases, which seriously threatens the health of the national people. For this reason, there is a need to enhance primary and secondary prevention of cerebrovascular diseases on the one hand and to increase the clinical rescue level of spontaneous intracerebral hematomas on the other hand. Meanwhile, in clinical practice, the number of intracranial tumor patients is high, and the incidence rate of intracranial tumor is about 1.9-5.4 people/(10 ten thousand people in year). In clinical surgery, neurosurgery is often required for patients of the kind described above. In performing such procedures, it is often necessary to perform an extra-ventricular drainage procedure on the patient in order to draw blood cerebrospinal fluid or blood clots from within the patient's cranium. For this purpose, a burr hole for placing the drainage tube needs to be drilled in the skull of the patient.

The skull drill is used as a medical instrument in neurosurgery, can be used for drilling holes in the skull of a patient, and is mostly manually operated and electrically operated in the market at present. The hand-operated cranial drill has the advantages of convenient holding and high controllable precision, but needs to take a long time to adjust the hand-operated cranial drill according to the experience of doctors.

At present, the electric skull drill is also used for craniotomy in hospitals, and has the following defects:

(1) The electric skull drill is not provided with a limiting or positioning mechanism, the drilling depth is not easy to master, and secondary injuries (such as injury to dura mater, pia mater and brain tissues) are easy to cause.

(2) The electric skull drill has high rotating speed and high temperature rise of the drill bit, so that the conditions of burning and even burning human tissues near the drill hole can occur.

(3) The electric skull drill has high overall price, is inconvenient for disposable use, and is not easy to thoroughly disinfect, so that the traditional electric skull drill is not beneficial to preventing cross infection in operation.

(4) Vibration of the electric cranial drill is harmful to the inside of the cranium, and is expressed as follows: when the partial pressure in the cranium is increased, the vibration of the electric cranial drill can aggravate the edema and damage of brain tissues, and the occurrence of brain hernia is easy to cause; vibration of the electric cranial drill may cause bleeding of intracranial vulnerable lesion tissues, and when performing an extracellular drainage operation on a cerebral hemorrhage patient, vibration may cause thrombus to fall off and bleeding again.

Disclosure of Invention

The present application aims to provide a skull drill by means of which the drilling of the skull can be achieved with increased safety.

Thus, according to the present application, a skull drill is provided, wherein the skull drill has a drill body with a shaft section and a drill section following the shaft section, wherein the diameter of the drill section is smaller than the diameter of the shaft section, wherein a stop thread is provided on the shaft section, wherein the stop device has a stop sleeve adjacent to the drill section and a locking sleeve adjacent to the stop sleeve on the side of the stop sleeve facing away from the drill section, wherein a first mating thread is provided on the inner wall of the stop sleeve, which mates with the stop thread, and a second mating thread is provided on the inner wall of the locking sleeve, which mates with the stop thread, wherein the stop sleeve can be screwed such that the first end face of the stop sleeve facing the drill section reaches a desired predetermined position, the first end face of the stop sleeve constitutes a stop, and the locking sleeve can be screwed such that the first end face of the locking sleeve facing the stop sleeve compresses the second end face of the locking sleeve, and such that the first end face of the locking sleeve facing the stop sleeve remains at the desired predetermined position.

At least one of the following advantages can be achieved by the cranial drill of the present application: stable drilling, high speed, safety, less secondary damage or easy control of drilling depth.

According to some embodiments, the limit threads may have a consistent thread turn along an axial direction of the bit body.

According to some embodiments, the first and second threads may have opposite thread handedness.

According to some embodiments, the limit screw thread may have one continuous screw thread, or may have a first screw thread and a second screw thread separated from each other, the first screw thread being engaged with the first engaging screw thread and the second screw thread being engaged with the second engaging screw thread.

According to some embodiments, a knurled section may be provided on the outer circumferential surface of the limit sleeve and/or on the outer circumferential surface of the locking sleeve, respectively.

According to some embodiments, the first end face of the limit sleeve may be configured as an annular face. Preferably, the annular face may be a planar face.

According to some embodiments, the annular face may constitute a circumferential radially outer flange and/or a radially inner flange.

According to some embodiments, the drill bit section may have a cutting section and a guiding section immediately following the cutting section. Preferably, the cutting section may have a plurality of main cutting edges, for example three, four or more main cutting edges, wherein helical flutes are provided between adjacent main cutting edges.

According to some embodiments, the cutting section may have four main cutting edges uniformly arranged along the circumferential direction of the cutting section, preferably the four main cutting edges may be identically configured.

According to some embodiments, the edges located on the guide sections may be rounded or chamfered.

According to some embodiments, the maximum diameter of the cutting section may be greater than the maximum diameter of the guiding section. This reduces the frictional resistance of the sides during drilling and also avoids secondary damage to the scalp tissue by the guide section.

According to some embodiments, the cranial drill may have a handle connected with the shaft section.

According to some embodiments, the handle may be V-shaped, the handle being fixedly connected at its tip to the shaft section at its end remote from the drill bit section.

According to some embodiments, the handle may be configured in a ring, or sphere, or cross, or wheel, or any other suitable shape.

According to some embodiments, the handle may have a short first leg and a long second leg, preferably the first and second legs may form an angle of 60 ° to 150 °, such as 80 ° to 120 °, such as about 90 °.

According to some embodiments, the rod-shaped section and the bit section may be integrally made; alternatively, the shaft section and the drill section may be formed as separate parts and fixedly connected to one another.

According to some embodiments, the length of the rod-shaped section may be greater than the length of the bit section. For example, the length ratio of the two may be greater than 1 and less than 2.

According to some embodiments, the cranial drill may be made of medical grade stainless steel, or may be made of titanium alloy.

Drawings

The present application is explained in more detail below with reference to the drawings by means of specific embodiments, but is not limited to the embodiments described in the drawings and explained in detail below. The drawings are as follows:

fig. 1 is an elevation view of a cranial drill according to one embodiment of the present application.

Fig. 2 is a partially cut-away elevation view of a cranial drill according to one embodiment of the present application.

Fig. 3 is an elevation view of the bit body that makes up the cranial drill of fig. 1.

Fig. 4 is a bottom view of the bit body that makes up the cranial drill of fig. 1.

Detailed Description

Illustrative embodiments of a cranial drill according to the present application are described below. In this specification, for purposes of explanation only, various systems, structures and devices are schematically depicted in the drawings, but not all features of an actual system, structure, and device, such as well known functions or structures, are not described in detail in order to avoid unnecessarily obscuring the present application. It will of course be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions must be made to achieve the developers 'or users' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it will be appreciated that such a determination of the actual implementation is complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

The terms and phrases used herein should be understood and interpreted to have a meaning consistent with the understanding of those terms and phrases by those skilled in the relevant art. The consistent usage of terms or phrases herein is not intended to imply a special definition of the term or phrase, i.e., a definition that is different from the ordinary and customary meaning as understood by those skilled in the art. To the extent that a term or phrase is intended to have a special meaning, i.e., a meaning other than that understood by skilled artisans, such a special definition will be expressly set forth in the specification in a definitional manner that directly and unequivocally provides the special definition for the term or phrase.

Throughout the following description, unless explicitly required to the contrary, the word "comprise" and variations such as "comprises" or "comprising", will be interpreted in an open, inclusive sense, i.e. as "comprising but not limited to".

A cranial drill 100 according to an embodiment of the present application is illustrated next in connection with fig. 1-4.

Referring to fig. 1, a cranial drill 100 generally has a drill body 1, a stop 2, and a handle 3. The cranial drill 100 may be made of a rigid material, such as medical grade stainless steel.

Referring to fig. 2, the bit body 1 may have a shaft section 5 at least partially covered by the stop 2 and a bit section 4 next to the shaft section 5. The diameter of the drill bit section 4 is smaller than the diameter of the rod-shaped section 5. The stop means 2 may be joined to said rod-shaped section 5 at least from one side of the drill bit section. A limiting thread 6 is provided on the rod-shaped section 5. The limiting device 2 can be provided with a limiting sleeve 7 and a locking sleeve 8, wherein a first matching thread matched with the limiting thread 6 is arranged on the inner wall of the limiting sleeve 7, and a second matching thread matched with the limiting thread 6 is arranged on the inner wall of the locking sleeve 8. The stop device 2 can thus be engaged on the rod-shaped section 5 by a threaded connection. The limit sleeve 7 can be screwed such that the first end face of the limit sleeve 7 facing the drill bit section 4 reaches a desired predetermined position, the first end face of the limit sleeve 7 constitutes a limit stop 9, and the locking sleeve 8 can be screwed such that the first end face of the locking sleeve 8 facing the limit sleeve 7 presses against the second end face of the limit sleeve 7 facing the locking sleeve 8, such that the first end face of the limit sleeve 7 remains in the desired predetermined position. The drilling depth can thus be easily and precisely adjusted and set. When using the cranial drill 100, the limit stop 9 can at least partially rest on the skull and/or scalp on the outer circumference of the drilled hole, whereby a reliable limit effect of the cranial drill can be achieved. The first end face of the limit sleeve 7 may be formed as an annular face, which may form a circumferential radially outer flange and/or a radially inner flange.

Referring to fig. 1 or 2, knurled sections may be provided on the outer circumferential surface of the limit sleeve 7 and on the outer circumferential surface of the locking sleeve 8, respectively. The axial position of the knurled sections along the limit sleeve 7 or the locking sleeve 8 can be at the same level as the first mating thread or the second mating thread, respectively. As a result, an anti-slip function can be provided when the axial positions of the limit sleeve 7 and the locking sleeve 8 on the bit body 1 are manually adjusted, whereby an adjustment of the drilling depth can be achieved quickly and accurately.

The handle 3 can be formed in a V-shape, the handle 3 being fixedly connected at its tip to the shaft section 5 at the end of the shaft section 5 remote from the drill section 4, for example welded or screwed. The handle 3 may have a short first leg 31 and a long second leg 32, wherein the first leg 31 and the second leg 32 may form an angle of 80 ° to 120 °, for example about 90 °. Alternatively, the handle 3 may also be ring-shaped, or spherical, or cross-shaped, or wheel-shaped. Advantageously, the handle 3 may be of ergonomic design.

The bit body 1 is shown in isolation in fig. 3. In an exemplary embodiment, the diameter of the tip circle of the limit screw thread 6 may be greater than the diameter of the other parts of the rod-shaped section 5 and thus also greater than the diameter of the drill bit section 4. The shaft section 5 and the drill section 4 can be produced in one piece, but the shaft section 5 and the drill section 4 can also be formed as separate parts and fixedly connected to one another. Furthermore, the length of the rod-shaped section 5 may be greater than the length of the drill bit section 4, and the ratio of the two may be greater than 1 and less than 2.

In fig. 3, the limit screw thread 6 has a uniform screw thread direction along the axial direction of the bit body 1, and the limit screw thread 6 has one continuous screw thread, however, the limit screw thread 6 may have a first screw thread and a second screw thread separated from each other, the first screw thread being engaged with the first engaging screw thread, and the second screw thread being engaged with the second engaging screw thread. In another embodiment, the limit screw thread 6 may include a first screw thread and a second screw thread separated from each other, the first screw thread and the second screw thread having opposite screw thread directions, the first screw thread being engaged with the first mating screw thread, and the second screw thread being engaged with the second mating screw thread. From this first screw line and second screw line can be designed alone, realize better regulation and spacing effect. It will be appreciated that the two threads may have the same or different handedness, and/or the same or different pitch.

Referring to fig. 3, the drill bit section 4 has a cutting section 21 at the tip and a guide section 22 next to the cutting section 21. The edge 12 located on the guide section 22 may be rounded or chamfered, thereby avoiding secondary damage to the scalp tissue of the patient by the edge 12 on the guide section 22. The maximum diameter of the cutting section 21 may be larger than the maximum diameter of the guiding section 22, which may reduce frictional resistance of the side during drilling and may also avoid secondary damage of the guiding section 22 to the scalp tissue.

Referring to fig. 4, the cutting section may in particular have a plurality of main cutting edges 10, for example four main cutting edges uniformly arranged along the circumferential direction of the cutting section, which may preferably be identically constructed. The main cutting edges of the cutting section 21 form an intersecting taper. Advantageously, the cutting function can be achieved both in forward and in reverse rotation of the drill bit section 4. Between adjacent main cutting edges 10, helical flutes 11 are provided for discharging resected bone chips from the helical flutes 11. In fig. 4, the rotation direction indicated by the arrow D is the first cutting direction. Opposite cutting directions are possible. In one application, it is possible to always operate in the first cutting direction. In another application, it is possible to always run in the opposite cutting direction to the first cutting direction. In a further application, the operation can be performed alternately in both cutting directions.

It is pointed out that the present application may especially relate to a manual skull drill, which is fast to operate and easy to sterilize comprehensively compared to hand-operated and electric skull drills; compared with an electric skull drill, the electric skull drill has lower vibration during operation, is safe and stable in drilling, and basically does not cause secondary injury to patients; in addition, the temperature rise in the drilled area is relatively slow during operation, so that burning of human tissue can be substantially avoided.

This application may include any feature or combination of features disclosed herein either implicitly or explicitly or any generalisation thereof, and is not limited to any of the limited scope of the foregoing list. Any of the elements, features, and/or structural arrangements described herein may be combined in any suitable manner.

The particular embodiments disclosed above are illustrative only, as the application may be modified and practiced in different but equivalent manners apparent to those skilled in the art having the benefit of the teachings herein. It is therefore evident that the particular embodiments disclosed above may be altered or modified and all such variations are considered within the scope and spirit of the application.

Claims (16)

1. Skull drill, characterized in that the skull drill (100) has a drill body (1) with a shaft section (5) and a drill section (4) next to the shaft section, the diameter of which is smaller than the diameter of the shaft section, on which shaft section a stop thread (6) is provided, and a stop device (2) with a stop sleeve (7) adjacent to the drill section and a locking sleeve (8) adjacent to the stop sleeve on the side of the stop sleeve facing away from the drill section, wherein a first mating thread mating with the stop thread is provided on the inner wall of the stop sleeve, and a second mating thread mating with the stop thread is provided on the inner wall of the locking sleeve, wherein the stop sleeve can be screwed such that the first end face of the stop sleeve facing the drill section reaches a desired predetermined position, the first end face of the stop sleeve constitutes a stop (9), and the locking sleeve can be screwed such that the first end face of the locking sleeve facing the stop sleeve presses the first end face of the stop sleeve against the desired position of the stop sleeve.

2. A cranial drill according to claim 1, wherein the limit screw thread has a uniform screw thread direction along the axial direction of the drill body; and is also provided with

The spacing thread has one continuous thread line or has a first thread line and a second thread line separated from each other, the first thread line being mated with the first mating thread and the second thread line being mated with the second mating thread.

3. A cranial drill according to claim 1, wherein the limit screw thread comprises a first screw thread and a second screw thread separated from each other, the first screw thread and the second screw thread having opposite screw thread directions, the first screw thread mating with a first mating screw thread and the second screw thread mating with a second mating screw thread.

4. A skull drill according to any of claims 1-3, characterized in that a knurled section is provided on the outer circumferential surface of the limit sleeve and on the outer circumferential surface of the locking sleeve, respectively.

5. A skull drill according to any of claims 1-3, characterized in that the first end surface of the limit sleeve is configured as an annular surface.

6. A skull drill according to claim 5, wherein the annular face constitutes a circumferential radially outer flange and/or a radially inner flange.

7. A skull drill according to one of claims 1 to 3, characterized in that the drill bit section has a cutting section (21) and a guiding section (22) next to the cutting section.

8. A skull drill according to claim 7, characterized in that the cutting section has a plurality of main cutting edges (10) and that between adjacent main cutting edges helical flutes (11) are provided.

9. The cranial drill of claim 7, wherein the cutting section has four main cutting edges of identical configuration uniformly arranged along the circumferential direction of the cutting section.

10. A skull drill according to claim 7, characterized in that the edges (12) on the guide sections are rounded or chamfered.

11. A cranial drill according to claim 7, wherein the maximum diameter of the cutting section is greater than the maximum diameter of the guide section.

12. A skull drill according to one of claims 1 to 3, characterized in that the skull drill has a handle (3) that is connected with the shaft section.

13. A skull drill according to claim 12, characterized in that the handle is configured in a V-shape, the handle being fixedly connected at its tip with the shaft section at the end of the shaft section remote from the bit section.

14. A skull drill according to claim 13, characterized in that the handle has a short first leg (31) and a long second leg (32), the first and second legs forming an angle of 80 ° to 120 °.

15. A skull drill according to any of claims 1 to 3, wherein the shaft section and bit section are integrally formed; alternatively, the shaft section and the drill section are formed as separate parts and are fixedly connected to one another.

16. A skull drill according to any of claims 1 to 3, wherein the length of the shaft section is greater than the length of the bit section.

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