CN211066867U

CN211066867U - Combined skull step drill bit with adjustable depth

Info

Publication number: CN211066867U
Application number: CN201921693392.9U
Authority: CN
Inventors: 董文文; 邱畅; 章文斌
Original assignee: Nanjing Brain Hospital Affiliated To Nanjing Medical University
Current assignee: Nanjing Brain Hospital Affiliated To Nanjing Medical University
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-07-24
Anticipated expiration: 2029-10-11

Abstract

The utility model discloses a combined skull step drill bit with adjustable depth, which comprises a drill bit body and a depth limiter, wherein the drill bit body comprises a connecting rod, a drill bit handle, a tool bit and a positioning pile arranged at the center of the end surface of the tool bit, which are connected in sequence; the depth limiter comprises a drill bit sleeve and a limiting mechanism, the drill bit sleeve is provided with a first cavity and a second cavity which are communicated with each other and run through from top to bottom, the first cavity is used for accommodating a tool bit, and the second cavity is used for penetrating through a drill bit handle; the limiting mechanism comprises a limiting hole and a fastening piece, and the fastening piece is configured to extend into the limiting hole to fix the drill bit body into a whole after the distance of the drill bit body extending out of the depth limiter is adjusted according to the pre-drilling depth. Through the combined skull step drill bit disclosed by the utility model, the problem that the skull drilling electrode fixing base is higher than the surface of the skull during DBS operation, and the healing of the operation incision is influenced is solved.

Description

Combined skull step drill bit with adjustable depth

Technical Field

The utility model discloses a belong to medical instrument technical field, concretely relates to medical treatment operation is with skull drilling equipment that can be used to in deep amazing operation of brain.

Background

Deep Brain Stimulation (DBS) surgery is recognized worldwide for the treatment of various psychologic diseases including dyskinetic diseases typified by parkinson's disease. The skull needs to be drilled during operation, then the electrode fixing base is fixed on the surface of the skull, and then the electrode is implanted, the thickness of the conventional electrode fixing base reaches about 4mm, so that the conventional electrode fixing base is not attractive, wound healing is influenced, and the psychological effect of a patient after the operation is also adversely affected.

SUMMERY OF THE UTILITY MODEL

For solving among the DBS operation skull drilling electrode fixed base and being higher than the skull surface, influence the technical problem of operation incision healing, the utility model discloses a degree of depth adjustable combination formula skull step drill bit can sink the electrode fixed base in the skull in being applicable to the DBS operation.

The technical scheme of the utility model as follows:

a combined skull step drill bit with adjustable depth comprises a drill bit body and a depth limiter, wherein the drill bit body comprises a connecting rod, a drill bit handle, a cutter head and a positioning pile arranged in the center of the end face of the cutter head, which are sequentially connected; the depth limiter comprises a drill bit sleeve and a limiting mechanism, the drill bit sleeve is provided with a first cavity and a second cavity which are communicated with each other and run through from top to bottom, the first cavity is used for accommodating the cutter head, and the second cavity is used for penetrating through the drill bit handle; the limiting mechanism comprises a limiting hole which is formed in the side wall of the drill bit sleeve and communicated with the second cavity, and a fastening piece detachably connected with the limiting hole, wherein the fastening piece is configured to be matched with the limiting hole to be used for fixing the drill bit body and the depth limiter into a whole after the distance of the bit head of the drill bit body extending out of the depth limiter is adjusted according to the pre-drilling depth.

Preferably, the depth limiter further comprises an annular limiting base plate arranged at the bottom of the drill bit sleeve, the inner diameter of the annular limiting base plate is consistent with the inner diameter of the drill bit sleeve, and the outer diameter of the annular limiting base plate is larger than the outer diameter of the drill bit sleeve.

Preferably, the drill bit handle is of an approximately cylindrical structure with an anti-skid platform arranged along the axial direction; the second cavity is provided with a platform structure matched with the anti-skid platform, and the limiting hole is arranged on the platform structure

As a preferable scheme, the part of the anti-skid platform extending out of the second cavity is provided with scale marks for reading depth data.

Preferably, the depth limiter further comprises an annular limiting bottom disc arranged at the bottom of the drill bit sleeve, and the diameter of the annular limiting bottom disc is larger than that of the drill bit sleeve.

As a preferred scheme, the limiting hole is a threaded hole, and the fastening piece has a threaded structure matched with the threaded hole.

Preferably, the fastener is a screw or a bolt.

Preferably, the limiting hole is arranged perpendicular to the axial direction of the drill bit shank.

Preferably, the positioning pile is of a cylindrical protruding structure.

Preferably, the cutting head has a fluted construction.

Has the advantages that: the utility model discloses a degree of depth adjustable combination formula skull step drill bit can cut the skull of specific thickness around boring the skull that establishes in advance, forms the skull step that is used for holding electrode fixing base, and the electrode fixing base who has solved installation behind the drilling of DBS operation skull exceeds the skull surface, influences operation incision healing and pleasing to the eye problem, also can eliminate patient's psychological influence to a certain extent.

Drawings

FIG. 1: the effect of the combined skull step drill after drilling bones is shown schematically;

FIG. 2: (a) a section schematic diagram of a drill bit body, (b) a three-dimensional structure schematic diagram of a skull drill bit;

FIG. 3: (a) a schematic cross-sectional view of a cranial drill, (b) a bottom view of a cutter head;

FIG. 4: (a) a section schematic view of the depth limiter, and (b) a three-dimensional structure schematic view of the depth limiter.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 4, the embodiment discloses a combined skull step drill (skull drill for short) with adjustable depth, which can be used for DBS surgery and mainly comprises a drill body 1 and a depth limiter 2.

The drill bit body 1 mainly comprises a connecting rod 11, a drill bit handle 12, a cutter head 13 and a positioning pile 14. Wherein, the connecting rod 11 is used for connecting a hand drill handle/power system which can be matched with the limiting structure. The drill bit shank 12 is of an approximately cylindrical configuration with an anti-slip land 15 in the axial direction for preventing the drill bit body 1 from rotating and slipping during drilling. The anti-skid platform 15 is further provided with a scale mark 16 for precisely adjusting the limiting depth. The cutter head 13 adopts a slotting design to increase the pressure and improve the bone drilling efficiency. The diameter and height of the cutter head 13 are matched with the electrode fixing base to be placed, so that an annular platform is drilled around the skull bone hole drilled in advance to form a step structure for placing the electrode fixing base. The spud 14 is a cylindrical structure, and the diameter of the spud is matched with the aperture of a skull bone hole drilled in advance, so as to be embedded into the bone hole and ensure that the center of the drilled hole is not deviated.

The diameter of the depth limiter 2 is slightly larger than that of the tool bit 13 of the drill bit body 1 so as to play a limiting role, and the depth limiter mainly comprises a drill bit sleeve 21, a fastening threaded hole 22, an annular limiting chassis 23 and a locking piece matched with the fastening threaded hole 22 for use. The drill sleeve 21 has a cavity 24 and a cavity 25, the cavity 24 is used for accommodating the cutter head 13 and has a shape and a size matched with those of the cutter head 13, the cavity 25 is used for penetrating the drill shank 12, has a diameter matched with that of the drill shank 12 and also has a platform structure matched with the anti-slip platform 15, and the drill bit 1 is prevented from rotating and sliding during drilling. The screw can be screwed into the fastening threaded hole 22 to abut against the anti-skid platform 15, so that the drill bit body 1 and the depth limiter 2 are fixed into a whole. The outer diameter of the annular limiting chassis 23 is larger than that of the drill sleeve 11, and the further limiting effect is mainly achieved, namely the cutter head 13 is limited to further drill after the drilling depth reaches a preset value (the adjustable range is 0.0-10.0mm and is adjusted according to the overall thickness of the skull of a patient). The inner ring of the annular limiting chassis 23 is consistent with the inner diameter of the cavity 25, and the outer ring can be circular or in other shapes, so long as the outer contour is larger than the drill sleeve 21, and the limiting effect is achieved.

The skull drill bit is used in the following specific way: during operation, a conventional DBS special drill is used for drilling holes to reach the dura mater, for example, a 14mm DBS special drill is used for drilling holes in a skull; then the skull drill bit described in the embodiment is replaced, the drill bit body 1 and the depth limiter 2 are combined for use, the length of the cutter head 13 extending out of the depth limiter 2 is adjusted, namely the distance between the cutter head 13 and the annular limiting chassis 23, namely the height of a step to be drilled for accommodating an electrode base with proper depth is adjusted, and then the drill bit body 1 and the depth limiter 2 are fixed into a whole through a locking piece group; the positioning pile 14 is inserted into a skull hole drilled in advance, and a hole is drilled downwards until the annular limiting base plate 23 is in contact with the surface of the skull, so that the tool bit 13 is limited to continue drilling, a circle of skull steps are formed around the skull hole drilled in advance, and an electrode fixing base can be installed in the steps. Therefore, the electrode fixing base which originally protrudes out of the surface of the skull sinks into the skull, so that the influence of the curvature of the surface of the skull on the base is avoided, postoperative incision suturing is facilitated, and the influence of the postoperative electrode fixing base higher than the surface of the skull on the appearance and the psychology of a patient is avoided.

To sum up, the utility model discloses a drill bit body uses with the cooperation of degree of depth stopper, and adjustable drill bit body bores the degree of depth (the height of step promptly) of going into the skull to form round skull step around boring the cranial hole established in advance, be used for placing electrode fixed baseplate, make it lie in below the skull plane as far as possible, play the protection patient, the effect of convenient operation.

It should be noted at last that the above is only the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiments, all the technical solutions belonging to the present invention belong to the protection scope of the present invention. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.

Claims

1. The combined skull step drill with the adjustable depth is characterized by comprising a drill body and a depth limiter, wherein the drill body comprises a connecting rod, a drill handle, a cutter head and a positioning pile arranged in the center of the end face of the cutter head, which are sequentially connected; the depth limiter comprises a drill bit sleeve and a limiting mechanism, the drill bit sleeve is provided with a first cavity and a second cavity which are communicated with each other and run through from top to bottom, the first cavity is used for accommodating the cutter head, and the second cavity is used for penetrating through the drill bit handle; the limiting mechanism comprises a limiting hole which is formed in the side wall of the drill bit sleeve and communicated with the second cavity, and a fastening piece detachably connected with the limiting hole, wherein the fastening piece is configured to be matched with the limiting hole to be used for fixing the drill bit body and the depth limiter into a whole after the distance of the cutter head of the drill bit body extending out of the depth limiter is adjusted according to the pre-drilling depth.

2. The combination skull step drill of claim 1, wherein the depth stop further comprises an annular stop floor disposed at the bottom of the drill bit sleeve, the annular stop floor having an inner diameter corresponding to the inner diameter of the drill bit sleeve and an outer diameter greater than the outer diameter of the drill bit sleeve.

3. A combined skull step drill according to claim 1 or 2, wherein the drill shank is of a generally cylindrical configuration with a skid platform disposed in the axial direction; the second cavity is provided with a platform structure matched with the anti-skid platform, and the limiting hole is arranged on the platform structure.

4. A combined skull step drill according to claim 3, wherein the portion of the anti-slip platform protruding out of the second cavity is provided with graduated markings for depth data reading.

5. The combination skull step drill of claim 1 or 2, wherein the stop hole is a threaded hole and the fastener has a threaded configuration that mates with the threaded hole.

6. A combined skull step drill according to claim 5, wherein the fastener is a screw or bolt.

7. A combined skull step drill according to claim 1 or 2, wherein the stop hole is arranged perpendicular to the axial direction of the drill bit shank.

8. A combined skull step drill according to claim 1 or 2, wherein the spud is of cylindrical convex configuration.

9. A combined skull step drill according to claim 1 or 2, wherein the cutter head has a fluted configuration.