CN113893017A

CN113893017A - Skull lock for neurosurgery

Info

Publication number: CN113893017A
Application number: CN202111169950.3A
Authority: CN
Inventors: 孙义程; 王晓野; 宋晓玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-01-07

Abstract

The invention discloses a neurosurgery skull lock, which belongs to the field of medical instruments and comprises an outer locking plate, an inner locking plate and a locking rod, wherein the outer locking plate and the inner locking plate are respectively positioned at the outer side and the inner side of a skull, the locking rod connects the outer locking plate and the inner locking plate, and the locking rod can freely rotate relative to the inner locking plate.

Description

Skull lock for neurosurgery

Technical Field

The present invention relates to the field of medical devices.

Background

The skull lock is a medical instrument for fixing the bone flap after the craniotomy, can quickly meet the clinical fixing requirement of the bone flap after the craniotomy, is simple and convenient to operate, fast to screw, firm to clamp, saves the operation time, and can be implanted into a human body for a long time.

Due to the fact that the outlines of the skull of different people are different, when the skull of the existing skull lock is fixed, the existing skull lock cannot be matched with the skull more closely, so that local stress of the skull lock is too large, and the fixing effect of the skull lock is affected.

Disclosure of Invention

The invention discloses a neurosurgery skull lock which comprises an outer locking plate, an inner locking plate and a locking rod, wherein the outer locking plate and the inner locking plate are respectively positioned on the outer side and the inner side of a skull, the locking rod connects the outer locking plate and the inner locking plate, the locking rod can freely rotate relative to the inner locking plate, the outer locking plate comprises a fixing part connected with the locking rod and a plurality of extending parts movably connected with the fixing part, the fixing part and the extending parts are in a curved surface shape, and the extending parts can expand outwards and contract inwards to change the outline size of the outer locking plate and the contact area with the skull. The section of the fixing part is circular, the circular center is raised and can be basically matched with the skull, and the circular center is connected with the lock rod.

As a further improvement, the extension has a greater length in the direction in which it can extend relative to other directions of the extension.

As a further improvement, the fixed part is internally provided with a first movable cavity, the tail end of the extension part is provided with a first movable block, the first movable block can move in the first movable cavity, and the extension part always extends into the first movable cavity outside the fixed part.

As a further improvement, the extending part is provided with a clamping groove, and the clamping groove and the adjusting clamp can be matched, so that the extending part extends relative to the fixing part.

As a further improvement, the adjusting pliers comprise two mutually hinged pliers handles, the two pliers handles can rotate mutually to change the angle between the two pliers handles, each pliers handle comprises a mutually hinged fixed rod and a sliding rod movably connected with the fixed rod, a second movable cavity is arranged in the fixed rod, the tail end of the sliding rod is inserted into the second movable cavity, the sliding rod can move relative to the fixed rod and extrude the second movable cavity, and the second movable cavity is extruded to change air pressure.

As a further improvement, the second movable cavities in the two sliding rods are communicated with each other.

As a further improvement, the adjusting pliers further comprise two pliers handles connected with the two pliers handles, a cavity is arranged in each pliers handle, the cavity is respectively communicated with second movable cavities in the two sliding rods, and the second movable cavities are communicated with the cavity through communicating pipes.

As a further improvement, the tail end of the sliding rod is provided with a second movable block, and the shape of the second movable block is matched with that of the second movable cavity so that the second movable block can move in the second movable cavity.

The invention also discloses an adjusting clamp which is the adjusting clamp.

Drawings

FIG. 1 is a schematic view of a skull lock of the present invention;

FIG. 2 is a schematic view of a stationary portion;

FIG. 3 is a schematic view of an adjustment clamp;

FIG. 4 is a schematic view of a stationary portion;

FIG. 5 is a schematic view of a tooth;

the labels in the figure are: 100-external locking piece, 110-fixed part, 111-movable tooth, 1111-third movable block, 1112-tooth rod, 1113-oblique rod, 112-third movable cavity, 113-channel, 114-first movable cavity, 120-extending part, 121-clamping groove, 122-first movable block, 200-internal locking piece, 300-locking rod, 310-tooth part, 400-adjusting pliers, 410-pliers handle, 411-sliding rod, 412-fixed rod, 413-second movable cavity, 414-second movable block, 420-pliers handle, 421-cavity and 430-communicating pipe.

Detailed Description

The embodiment discloses a neurosurgery skull lock, as shown in fig. 1, including outer locking plate 100, interior locking plate (200) and locking lever 300, outer locking plate and interior locking plate be located the outside and the inboard of skull respectively, the locking lever is connected outer locking plate and interior locking plate, locking lever can be relative inner locking plate 200 free rotation, outer locking plate 100 include the fixed part 110 of being connected with locking lever 300 and with 4 extension 120 of fixed part swing joint, 4 extension 120 evenly distributed in four mutually perpendicular's of fixed part direction.

As shown in fig. 2, the fixing part 110 and the extension part 120 are curved in a sectional view of the fixing part and the extension part, which can be expanded outward and contracted inward to change the size of the contour of the outer locking piece 100 and the contact area with the skull bone. Thereby enabling the outer locking plate 100 to be sufficiently contacted with the skull bone.

As shown in fig. 1, the fixing portion is circular in cross-section, with a circular center that is convex and substantially able to mate with the skull bone, and a circular center that is connected to the locking rod. The extension has a greater length in the direction in which it can extend relative to the other directions of the extension, and in a preferred embodiment the extension is of a rectangular configuration with rounded ends.

As shown in fig. 2, a first movable chamber 114 is provided in the fixed portion 110, a first movable block 122 is provided at the end of the extending portion 129, the first movable block can move in the first movable chamber 114, and the extending portion extends into the first movable chamber 114 at the outer side of the fixed portion. The extending part is provided with a clamping groove 121, and the clamping groove can be matched with the adjusting clamp 400, so that the extending part extends relative to the fixing part.

As shown in fig. 3, in order to implement the structure of the adjustable clamp according to this embodiment, the adjustable clamp 400 includes two clamp handles 410 hinged to each other, the two clamp handles can rotate relative to each other to change the angle between the two clamp handles 410, each clamp handle 410 includes a fixed rod 412 hinged to each other and a sliding rod 411 movably connected to the fixed rod, a second movable cavity 413 is disposed in the fixed rod, the end of the sliding rod is inserted into the second movable cavity 413, the sliding rod can move relative to the fixed rod and press the second movable cavity 413, and the second movable cavity is pressed and the air pressure is changed. The second movable chambers in the two sliding bars 411 are communicated with each other. The adjusting pliers 400 further comprises a pliers handle 420 connected with the two pliers handles, a cavity 421 is arranged in the pliers handle, the cavity is respectively communicated with the second movable cavities in the two sliding rods, and the second movable cavity 413 is communicated with the cavity 421 through a communicating pipe 430. The end of the sliding rod is provided with a second movable block 414, and the shape of the second movable block is matched with the second movable cavity so that the second movable block can move in the second movable cavity. In a preferred embodiment, the chamber 421 is provided with a pneumatic filling port to adjust the air pressure in the chamber 421.

Meanwhile, the outer locking piece 100 and the locking rod 300 can be connected through thread rotation, in another preferred embodiment, the outer locking piece 100 is pressed downwards to lock the outer locking piece 100 and the locking rod 300, specifically, the fixing portion 110 is provided with a plurality of third movable cavities 112, the third movable cavities are communicated with hollow portions (where the locking rod passes) of the fixing portion through channels 113, a plurality of movable teeth 111 are arranged, the movable teeth comprise third movable blocks located in the third movable cavities 112, the third movable blocks are connected with tooth rods 1112, the tail ends of the tooth rods are provided with inclined rods 1113, the locking rod 300 is provided with tooth portions 310, and the tooth portions and the inclined rods are matched to enable the fixing portion to move downwards relative to the locking rod and cannot move upwards relative to the locking rod. When in use, force is applied to the fixing part to enable the fixing part to reach the proper position, and then the extending part is opened, and the lock rod is broken off.

The adjusting forceps are characterized in that the two second movable cavities 413 are communicated, so that the forces applied to the two second movable blocks are basically the same, the two forceps handles 400 of the adjusting forceps can provide expansion forces with basically the same magnitude to the extension parts 120, and the sliding rod 411 can slide relative to the fixed rod 412, so that the outward extending lengths of the four extension parts 120 of the adjusting forceps are not necessarily the same, and the outward extending lengths of the four extension parts 120 of the adjusting forceps are basically the same according to the external contour of the skull and the extrusion force applied to the extension parts, therefore, the outward extending forces (provided by the sliding rod 411) of the extension parts are basically the same, and the extension parts of the adjusting forceps can be better attached to the skull according to the shape of the skull, so that the local stress of a skull lock is reduced, and the use effect and the service life of the skull are improved.

Claims

1. The utility model provides a neurosurgery skull lock, including outer locking plate (100), interior locking plate (200) and locking lever (300), outer locking plate and interior locking plate be located the outside and the inboard of skull respectively, the locking lever is connected outer locking plate and interior locking plate, locking lever can be relative interior locking plate (200) free rotation, a serial communication port, outer locking plate (100) include fixed part (110) be connected with locking lever (300) and a plurality of extension (120) with fixed part swing joint, fixed part (110) and extension (120) become the curved surface shape, the extension can expand to the outside and inwards shrink in order to change the profile size of outer locking plate (100) and with skull area of contact.

2. A neurosurgical skull lock according to claim 1 wherein the fixing portion is circular in cross-section with a circular centre which is convex and substantially conformable to the skull, the circular centre being connected to the locking bar.

3. A neurosurgical skull lock according to claim 2 wherein the extension has a greater length in the direction in which it can extend relative to other directions of the extension.

4. Neurosurgical skull lock according to claim 3, wherein the fixation part (110) is provided with a first active cavity (114) therein, and wherein the extension part (129) is provided at its distal end with a first active mass (122) which is movable in the first active cavity (114), the extension part extending into the first active cavity (114) all the way outside the fixation part.

5. Neurosurgical skull lock according to claim 4, wherein the extension part is provided with a catch (121), said catch and adjustment clamp (400) being adapted to cooperate such that the extension part extends relative to the fixation part.

6. The neurosurgical skull lock according to claim 5, wherein the adjusting forceps (400) comprises two forceps handles (410) hinged to each other, the two forceps handles can rotate relative to each other to change the angle between the two forceps handles (410), each forceps handle (410) comprises a fixed rod (412) hinged to each other and a sliding rod (411) movably connected with the fixed rod, a second movable cavity (413) is arranged in the fixed rod, the tail end of the sliding rod is inserted into the second movable cavity (413), the sliding rod can move relative to the fixed rod and press the second movable cavity (413), and the second movable cavity is pressed, so that the air pressure is changed.

7. Neurosurgical skull lock according to claim 6, wherein the second active cavities in both sliding bars (411) are in communication with each other.

8. The neurosurgical skull lock according to claim 7, wherein the adjusting forceps (400) further comprises a forceps handle (420) connected with the two forceps handles, a cavity (421) is arranged in the forceps handle, the cavity is respectively communicated with the second movable cavities in the two sliding rods, and the second movable cavity (413) is communicated with the cavity (421) through a communicating pipe (430).

9. The neurosurgical skull lock of claim 8, wherein the distal end of the sliding bar is provided with a second movable block (414), the second movable block having a shape that matches the second movable cavity such that the second movable block is movable within the second movable cavity.

10. An adjustment clamp according to any one of claims 6-9.