CN109498990B - Medical instrument fixing device - Google Patents
Medical instrument fixing device Download PDFInfo
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- CN109498990B CN109498990B CN201811577737.4A CN201811577737A CN109498990B CN 109498990 B CN109498990 B CN 109498990B CN 201811577737 A CN201811577737 A CN 201811577737A CN 109498990 B CN109498990 B CN 109498990B
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- Prior art keywords
- bone hole
- side wall
- hole base
- locking plate
- fixing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1604—Chisels; Rongeurs; Punches; Stamps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1695—Trepans or craniotomes, i.e. specially adapted for drilling thin bones such as the skull
Abstract
The embodiment of the invention provides a medical instrument fixing device. The fixing device comprises a bone hole base, wherein the bottom of the bone hole base is provided with at least one part of area which is elastic and is sealed to seal; the locking plate is arranged in the bone hole base and used for fixing the medical instrument; and the skull cover plate is arranged on the locking plate and used for compressing and fixing the bone hole base. Ensuring the operation effect.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a medical instrument fixing device which is used for fixing an implanted electrode or other medical instruments on a skull.
Background
With the development of medical technology, medical instruments are implanted into a human body during some surgical procedures to achieve the purpose of treatment or detection. In the Deep Brain Stimulation (DBS) operation, a Deep Brain electrical Stimulation system is one of the implantable neurostimulation systems, and the system includes a pulse generator, electrodes and an extracorporeal device implanted in a body. The electrodes are connected with the pulse generator, and the pulses generated by the pulse generator are transmitted to a specific part to generate electric stimulation, so that the function of the human body is improved and recovered. The positioning and fixing of the implanted electrode are the key for ensuring the effect of the implantation operation, however, in the process of fixing the electrode, the leakage of cerebrospinal fluid is easy to occur, and the effect of the operation is influenced.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a medical instrument fixing device, which avoids leakage of cerebrospinal fluid and ensures the effect of surgery. The device comprises:
the bottom of the bone hole base is provided with at least part of area which is elastic and is sealed to seal;
the locking plate is arranged in the bone hole base and used for fixing the medical instrument; and
and the skull cover plate is arranged on the locking plate and used for compressing and fixing the bone hole base.
Further, the bone hole base includes:
a flexible structural member having a closed bottom and an upper opening; and
a hard structural member wrapped in the soft structural member for supporting the soft structural member, the hard structural member having openings at both upper and lower portions.
Further, the soft structural member includes:
the outer side of the side wall is tightly connected with the hole wall of the hole;
the flange is connected with the upper end of the side wall, and the lower surface of the flange is tightly connected with the upper surface of the mounting piece; and
and the sealing film is connected with the lower end of the side wall and seals the bottom surface of the side wall.
Further, the hard structural member includes:
a cylindrical sidewall, a bottom surface of which is in contact with a sealing film of a soft structure, and an outer surface of which is in contact with an inner surface of the sidewall;
a flange connected to the upper end of the side wall, the lower surface of the flange being in contact with the upper surface of the flange of the flexible structure (11).
Further, the soft structural part is made of silica gel.
Further, the locking plate includes:
a peripheral fixation surface for cooperating with the induration member to secure the locking plate in the bone hole seat; and
the clamping surfaces are oppositely arranged inside the medical instrument holder and are used for clamping the medical instrument.
Furthermore, the inside wall of the bone hole base is provided with protrusions distributed in the circumferential direction, and the outer circumferential surface of the locking plate is provided with protrusions clamped with the protrusions, so that the locking plate is limited to move in the circumferential direction in the bone hole base.
Further, the symmetrical structure that the locking plate set up as an organic whole includes: the two symmetrical clamping arms and the two symmetrical fixing arms are respectively connected with the same connecting end;
the two clamping arms are provided with opposite clamping surfaces and used for clamping the medical instrument;
the fixing arms are located on the outer sides of the corresponding clamping arms and used for fixing the locking plates.
Further, the bone hole cover plate includes:
the lower surface of the disc-shaped main body is provided with a spigot feature, and the spigot is matched with the inner wall of the bone hole base; and
the ear-shaped structures are symmetrically distributed on two sides of the outer wall of the disc-shaped main body, through holes are formed in the ear-shaped structures, and skull screws fix the bone hole cover plate through the through holes.
Wherein the connecting part of the lug-shaped structure and the disc-shaped main body is provided with a groove for tightly matching the bone hole cover plate with mounting pieces with different shapes.
Furthermore, a plurality of grooves are formed in the upper surface of the bone hole base, a groove capable of being matched with the grooves is formed in the lower surface of the skull cover plate, and the grooves jointly form a through hole for fixing the medical instrument.
In the embodiment of the invention, the fixing device is used for sealing the hole by adopting a bone hole base with the bottom arranged to be elastic and closed at least in partial area. Prevents intracranial pneumatosis caused by leakage of cerebrospinal fluid in the operation process, and further oppresses brain tissue displacement. The success rate of deep brain electrical stimulation surgery is improved in the electrode fixing link, and the surgery effect is improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is an exploded view of a medical device securement device according to an embodiment of the present invention;
FIGS. 2 and 3 are three-dimensional block diagrams of bone hole bases according to embodiments of the present invention;
FIG. 4 is a radial cross-sectional view of a bone hole base according to an embodiment of the present invention;
FIGS. 5-7 are three-dimensional structural views of a locking plate of an embodiment of the present invention;
FIGS. 8-9 are three-dimensional block diagrams of bone aperture cover plates according to embodiments of the present invention;
FIGS. 10-16 are schematic views of a process of using an embodiment of the present invention;
fig. 17-20 are schematic views of another use process of the embodiment of the invention.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to". In the description of the present invention, "multi-layer" means two or more layers unless otherwise specified.
It will be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it can be directly on, adjacent to, connected or coupled to the other elements or layers or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to" or "directly coupled to" other elements or layers, there are no intervening elements or layers present. Spatial relationship terms such as "below …", "below", "lower", "above …", "above", and the like may be used herein for ease of description to describe the relationship of one element or feature to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may assume other orientations (rotated 90 degrees or at other orientations) and the spatial relationship descriptors used herein interpreted accordingly.
At present, commercial fixing devices are mainly adopted for fixing the brain deep stimulation electrodes, and partial doctors can also adopt various titanium sheets for fixing the electrodes. These solutions to some extent satisfy the requirements of electrode fixation, but can lead to electrode displacement and destruction. In a general DBS procedure, after drilling a skull, the skull base of the fixture is placed, and then the dura mater is manually peeled open, after which the arachnoid membrane is inevitably destroyed and cerebrospinal fluid leaks. A number of literature reports indicate that cerebrospinal fluid leakage can lead to intracranial pneumatosis, which in turn stresses brain tissue displacement. The electrodes may deviate from the expected position after implantation in a preoperatively planned implantation path. Implantation deviation due to intracranial pneumatosis resulting from cerebrospinal fluid leakage is a significant cause of failed or poor efficacy of DBS procedures. Some doctors can use the albumin glue to seal the cranial bone hole after opening the dura mater, reduce leakage of cerebrospinal fluid and improve implantation effect, but the higher cost of the albumin glue can increase the burden of patients, and in addition, the adoption of the albumin glue to temporarily seal the cranial bone hole is not completely used by all doctors.
In the embodiment of the invention, the medical instrument fixing device is used for being placed in a skull hole and used for fixing a deep brain stimulation electrode. It should be understood that the medical device securement device may also be used to secure other medical devices.
Fig. 1 is an exploded view of a medical device securement device in accordance with an embodiment of the present invention. As shown in fig. 1, the apparatus includes: the bone hole base 1, the locking plate 2, the skull cover plate 3 and the skull bone nail 4.
The bottom of the bone hole base 1 is provided to be elastic and airtight for sealing at least a partial area. The bone hole base is closely matched with the skull hole 601 of the skull 6 to avoid cerebrospinal fluid leakage during the operation.
The locking plate 2 is arranged in the bone hole base 1 and used for fixing the medical instrument.
The skull cover plate 3 is arranged on the locking plate and used for compressing and fixing the bone hole base 1.
Fig. 2 and 3 are three-dimensional structural views of a bone hole base, fig. 2 being an upper surface of the bone hole base, and fig. 3 being a lower surface of the bone hole base. Fig. 4 is a radial cross-sectional view of the bone hole base. As shown in fig. 2-4, the outer surface of the bone hole base 1 is made of soft material. The bone hole base 1 is composed of a soft structural component 11 and a hard structural component 12 together, and forms a barreled structure with an upper flange 101. The flange 101 is provided with a groove 102, and the bottom surface of the groove 102 is consistent with the upper surface of the soft material. An inner flange 103 is distributed on the inner circumference of the inner side wall 105 of the bone hole base 1. Specifically, the inner flange 103 is located at the lower end of the bone hole base inner side wall 105. The inner flange 103 serves to limit the axial position of the locking plate 2 and to fix the locking plate 2 in the vertical direction. The inner side wall 105 close to the upper surface of the inner flange 103 is provided with the protrusions 104 which are evenly distributed along the circumferential direction. The protrusion 104 is used for being mutually clamped with the recess on the outer peripheral surface of the locking plate 2, and is used for limiting the circumferential movement of the locking plate in the bone hole base. The bone hole base comprises externally a flange 109, a side wall 108 and a sealing membrane 107. Wherein, the flange 109 is the lower surface of the base 101, the sidewall 108 is the outer sidewall of the bone hole base, and the sealing membrane 107 is a membrane structure for closing the lower through hole of the bone hole base 1.
In particular, the soft structure 11 has a closed bottom and an upper opening. The soft structural member 11 includes: a cylindrical side wall 108, a flange 109 and a sealing membrane 107.
The outside of the side wall 108 is tightly connected to the wall of the hole.
The flange 109 is connected to the upper end of the side wall 108, and the lower surface of the flange 109 is tightly connected to the upper surface of the mounting member 6. Wherein the mounting 6 is a skull bone.
The sealing film 107 is attached to the lower end of the side wall 108, and the sealing film 107 closes the bottom surface of the side wall.
The materials of the side wall 108, the flange 109 and the sealing membrane 107 are soft materials. The sealing film 107 has a pierceability and still has good sealing performance after multiple punctures. Specifically, the sealing film 107 may be silicone. The soft structural member 11 may be formed by an injection molding process.
Specifically, the hard structural member 12 is wrapped in the soft structural member 11 for supporting the soft structural member 11, and the hard structural member 12 has openings at both upper and lower portions. The hard structural member 12 includes: inner side wall 105, flange 121, groove 102, inner flange 103, and protrusion 104.
The bottom surface of the inner side wall 105 is in contact with the sealing film 107 of the soft structure 11.
The lower surface of the flange 121 is in contact with the upper surface of the flange 109 of the soft structural member 11.
The groove 102 is used for matching with the groove on the bone hole cover plate 3 to fix the medical apparatus in the horizontal direction.
The inner flange 103 is located at the lower end of the inner side wall 105 on the inner periphery of the inner side wall 105.
The projections 104 are evenly distributed in the circumferential direction on the inner side wall 105 and are located above the inner flange 103.
In particular, the hard structural member may be formed using an injection molding process.
As shown in fig. 4, the inner side of the soft structural member 11 is tightly combined with the outer side of the hard structural member 12 to form a whole, and the soft structural member 11 and the hard structural member 12 can be combined by means of mechanical assembly. In another alternative implementation, the soft structural member 11 and the hard structural member 12 may be integrally formed by a two-shot molding process.
Fig. 5 to 7 are three-dimensional structural views of the locking plate. As shown in fig. 5-7, the outer periphery of the locking plate 2 has a securing surface 206 for cooperating with the induration member to secure the locking plate in the bone hole base. The locking plate 2 has opposite clamping surfaces 204 inside, and the clamping surfaces 204 are used for clamping medical instruments. The symmetrical structure that locking plate 2 set up as an organic whole includes: two symmetrical clamping arms 201 and two symmetrical fixing arms 202, wherein the two symmetrical clamping arms 201 and the two symmetrical fixing arms 202 are respectively connected with the same connecting end. The two gripping arms 201 have opposing gripping surfaces 204 for gripping the medical instrument. The fixing arm 202 is located outside the corresponding clamping arm 201, and is used for fixing the locking plate.
Specifically, the locking plate 2 has a symmetrical structure, and the outer side is a fixing arm 202 and the inner side is a clamping arm 201. Two buckles 207 which are oppositely arranged along the radial direction are arranged on the outer side of the fixing arm, and the inner flange 103 on the bone hole base 1 is clamped by the buckles 207 and the fixing surface 206 of the locking plate 2, so that reliable axial fixing is formed. The periphery of the clamping arm 201 is provided with a protrusion 203, and the protrusion 203 and the protrusion 104 on the inner side wall of the bone hole base 1 limit the circumferential rotation of the locking plate together. The clamping arms 201 are elastic cantilever structures, an opening is formed between the two clamping arms 201 in a natural state, clamping surfaces 204 are arranged on two sides of the opening, and the distance between the clamping surfaces 204 is smaller than the size of the fixed medical appliance. The root parts of the two clamping arms 201 are provided with deformation holes 205 which are communicated along the axial direction and are communicated with the openings so as to realize the relative movement of the two clamping arms. During the use, place the hole characteristic 2011 on instrument operation centre gripping arm 201, make the distance between the clamping face 204 expand, be greater than the external diameter of the medical instrument that centre gripping, place medical instrument between clamping face 204 to fix the jam plate 2 to the bone hole base along medical instrument axis direction, withdraw from and place the instrument, the clamping arm 201 is kick-backed under the effect of elastic restoring force, will be located the medical instrument centre gripping between two clamping arms 201.
Fig. 8-9 are three-dimensional structural views of the bone hole cover plate. As shown in fig. 8 to 9, the bone hole cover plate 3 includes: the bone hole base comprises a disc-shaped main body 301, wherein a spigot 304 is arranged on the lower surface of the disc-shaped main body 301, and the spigot 304 is matched with the inner side wall of the bone hole base 1. The height of the spigot 304 is greater than the depth of the groove 102 on the bone hole base 1, the spigot can seal the groove 102 on the bone hole base flange 101 without the medical instrument penetrating out after the bone hole cover plate is matched with the bone hole base, the medical instrument generates certain deformation in a channel formed by the bone hole cover plate 3 and the bone hole base 1, and the medical instrument penetrates out of the channel. Ear structures 302 symmetrically distributed on two sides of the outer wall of the disc-shaped body 301, wherein the ear structures 302 are provided with through holes 3021, and skull screws fix the bone hole cover plate 3 through the through holes 3021.
Wherein the connection of the lug-shaped structure 302 and the disc-shaped body 301 has a groove 303, and the groove 303 can adapt to the fixation of the bone hole cover plate 3 on the skull bone surface with different curvatures through deformation.
The lower end surface of the disc-shaped main body 301 is provided with a groove 305 along the radial direction, the groove 305 penetrates through the outer diameter of the main body 301, the lower surface of the skull cap 3 is provided with a groove 305 capable of being matched with the groove 102 of the bone hole base 1, and the groove 102 and the groove 305 are matched with each other to form a through hole together, so that a channel for a fixed medical device to penetrate out of the fixing device is formed together and the medical device is fixed.
Fig. 10-16 are schematic views of a process of using an embodiment of the present invention. According to the planned electrode implantation path before the operation, a skull hole 601 is made on the skull of the patient by adopting a standard operation process, and the dura mater 8 is reserved. Taking the bone hole base 1, slowly pressing into the skull hole 601 until the lower surface 109 of the bone hole base flange 101 is tightly attached to the surface of the skull, the outer diameter of the outer side wall 108 of the bone hole base 1 is slightly larger than the aperture of the skull, the outer side wall 108 is made of soft material, the outer side wall 108 deforms, and the wall of the skull hole and a leakage channel on the outer side of the bone hole base 1 are sealed. The lower surface 109 of the flange of the bone hole base 1 adopts a cambered surface design, and the curvature of the surface of the skull 6 is adapted to the maximum extent. After placement of the bone hole base 1 is complete, a sealing membrane 107 separates the intracranial space from the extracranial space.
The puncture catheter 7 passes through the sealing film 107 and the hard film 8 in sequence, and the leakage channel between the outer wall of the puncture catheter and the sealing film 107 is sealed by the elastic action of the sealing film 107. The electrode 5 is implanted into the target position through the inner hole of the puncture catheter. The puncture catheter 7 is slowly withdrawn and the sealing membrane 107 is further restored and clamped across the stimulating electrode 5. The locking plate 2 assembled on the placing tool in advance is taken, the angle is adjusted, the electrode 5 is placed in the opening 204 and is axially placed in an inner hole of the bone hole base 1 along the electrode 5, the locking plate 2 is axially fixed by the buckle 207 and the inner flange 103 of the bone hole base 1, and the circumferential limit of the locking plate 2 is realized by the bulge 104 and the bulge 203. Upon withdrawal of the deployment tool, the locking arm 201 springs back, clamping the electrode therebetween. The wire is withdrawn from the electrode, the electrode is bent into the groove 102 and adjusted to eliminate twisting and kinking. Taking the bone hole cover plate 3, matching the seam allowance 304 on the bone hole cover plate with the inner side wall 105 of the bone hole base, adjusting the direction of the bone hole cover plate 3 in the process to enable the groove 305 on the bone hole cover plate 3 to be parallel to the axis of the groove 102, arranging the electrode 5 in the space formed by the grooves 102 and 305, compressing the bone hole cover plate 3, taking the skull screw 4 to fix the bone hole cover plate 3 on the surface of the skull 6, further compressing the electrode 5 on the upper surfaces of the bone hole cover plate 3 and the locking plate 2, and finishing the fixation of the electrode. In the embodiment of the invention, all passages from the skull hole to the outside of the skull are effectively sealed, and the cerebrospinal fluid has no leakage passage, so that the cerebrospinal fluid can be effectively prevented from leaking.
Fig. 17-20 are schematic views of another use process of the embodiment of the invention. The human dura mater tensile strength is about 37kg/cm2In addition, if intracranial vascular reconstruction is not adopted before an operation, blood vessels under the dura mater can be damaged in the dura mater puncturing process, so that intracranial hemorrhage is caused. To avoid this, the medical device fixture can be used by first removing the dura mater and then rapidly placing the bone hole base 1 of the present invention, the bone hole base 1 acts like a cork to seal the cranial bone hole 601 and prevent the cranial bone from being damagedPreventing further leakage of cerebrospinal fluid. Since there is leakage of cerebrospinal fluid immediately after the dura mater is opened, this solution does not avoid leakage of cerebrospinal fluid during the period from the dura mater being opened to the placement of the bone hole base 1. The sealing membrane 107 is made of transparent elastic material, so that intracranial blood vessels can be observed well, blood vessels can be avoided in the puncturing process of the puncture catheter, and the operation after the puncture catheter is inserted is consistent with the first use method (as shown in figures 17-20). Although the scheme can not avoid cerebrospinal fluid leakage in a short period of time after the dura mater is opened, the cerebrospinal fluid leakage channel is closed as long as the bone hole base 1 is arranged in the skull hole 601, and compared with the traditional electrode fixing scheme, the cerebrospinal fluid leakage condition can be greatly improved.
Meanwhile, the bone hole base and the locking plate are positioned in the skull hole, after the bone hole base and the locking plate are installed, the electrode penetrates out of the fixing device along the surface of the skull, the height of the protrusion of the fixing device on the surface of the skull is only the thickness of the skull cover plate and the diameter of the electrode, the height of the protrusion formed on the surface of the skull is low, the risk of skin burst can be reduced, and the appearance is improved.
In the embodiment of the invention, the fixing device is used for sealing the cranial bone hole by adopting a bone hole base with the bottom arranged to be elastic and closed at least in partial area. Prevents intracranial pneumatosis caused by leakage of cerebrospinal fluid in the operation process, and further oppresses brain tissue displacement. The success rate of deep brain electrical stimulation surgery is improved in the electrode fixing link, and the surgery effect is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A medical device securement apparatus, characterized in that the apparatus comprises:
a bone hole base (1) with the bottom being provided with at least a part of area having elasticity and being sealed to be sealed;
the locking plate (2) is arranged in the bone hole base (1) and used for fixing the medical instrument; and
the skull cover plate (3) is arranged on the locking plate (2) and is used for compressing and fixing the bone hole base;
wherein the bone hole base (1) comprises:
a soft structural member (11) having a closed bottom and an upper opening; and
a hard structural member (12) wrapped in the soft structural member (11) for supporting the soft structural member (11), the hard structural member (12) having openings at both upper and lower portions;
wherein the soft structure (11) comprises:
a cylindrical side wall (108), wherein the outer side of the side wall (108) is tightly connected with the wall of a skull hole (601);
a flange (109) connected with the upper end of the side wall, wherein the lower surface of the flange (109) is tightly connected with the upper surface of the mounting piece (6); and
and a sealing film (107) connected to the lower end of the side wall, wherein the sealing film (107) seals the bottom surface of the side wall (108).
2. The device according to claim 1, wherein the hard structural member (12) comprises:
a cylindrical side wall (105), the bottom surface of the side wall (105) being in contact with a sealing film of a soft structure, the outer surface of the side wall (105) being in contact with the inner surface of the side wall (108);
a flange (121) connecting the upper ends of the side walls (105), the lower surface of the flange (121) being in contact with the upper surface of the flange (109) of the flexible structure (11).
3. The device according to claim 1, characterized in that the material of the soft structural part (11) is silicone.
4. The device according to claim 1, characterized in that said locking plate (2) comprises:
a peripheral fixing surface (206) for cooperating with the hard structural member to fix the locking plate (2) in the bone hole seat (1); and
the clamping surfaces are oppositely arranged inside the medical instrument holder and are used for clamping the medical instrument.
5. The device according to claim 1, characterized in that the inner side wall of the bone hole base (1) is provided with circumferentially distributed protrusions (104), and the outer circumferential surface of the locking plate (2) is provided with protrusions (203) which are mutually engaged with the protrusions for limiting the circumferential movement of the locking plate (2) in the bone hole base (1).
6. The device according to claim 1, characterized in that said locking plate (2) is a symmetrical structure in one piece, comprising: the two symmetrical clamping arms (201) and the two symmetrical fixing arms (202) are respectively connected with the same connecting end;
the two clamping arms (201) are provided with opposite clamping surfaces (204) for clamping the medical instrument;
the fixing arms (202) are located on the outer sides of the corresponding clamping arms (201) and used for fixing the locking plate (2).
7. The device according to claim 1, characterized in that the skull cap (3) comprises:
the lower surface of the disc-shaped main body (301) is provided with a spigot (304) feature, and the spigot (304) is matched with the inner wall of the bone hole base (1); and
the ear-shaped structures (302) are symmetrically distributed on two sides of the outer wall of the disc-shaped main body (301), wherein the ear-shaped structures (302) are provided with through holes (3021), and a skull screw (4) fixes the skull cover plate (3) through the through holes (3021);
wherein the lug structure (302) and the disc-shaped body (301) connecting part are provided with grooves (303) for tightly matching the skull cap (3) and the mounting pieces (6) with different shapes.
8. The device according to claim 1, characterized in that the bone hole base (1) is provided with a plurality of grooves (102) on the upper surface, the skull cap is provided with a groove (305) on the lower surface which can be matched with the plurality of grooves (102), and the grooves (102) and the grooves (305) form a through hole together for fixing the medical apparatus.
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| CN201811577737.4A CN109498990B (en) | 2018-12-20 | 2018-12-20 | Medical instrument fixing device |
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| CN109498990B true CN109498990B (en) | 2021-03-19 |
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| Design and Analysis of a Transcutaneous Telemetry Device for Brain Stimulator;Wang, Weiming; Hao, Hongwei; Ma, Bozhi;《Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society》;20090906;2153-2156 * |
| 国产脑起搏器的研制与临床试验进展;李路明;《中国生物医学工程学会成立30周年纪念大会暨2010中国生物医学工程学会学术大会壁报展示论文》;20101202;19-23 * |
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| CN109498990A (en) | 2019-03-22 |
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