Adjustable head position fixer for minimally invasive surgery of cerebral hemorrhage patient

Abstract

The utility model relates to medical auxiliary instrument technical field discloses an adjustable brain hemorrhage patient minimally invasive operation head position fixer, including base plate, both sides of base plate top are all slidingly connected with the sliding block, one side of sliding block is equipped with the limiting component that limits it, one side of sliding block top is fixedly equipped with the side stop bar, the top of side stop bar is equipped with the curved bar, be equipped with the adjusting assembly that angle adjustment is carried out to the curved bar between curved bar and side stop bar, one side of side stop bar and one side of curved bar all bond with the soft pad no.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, specifically an adjustable head fixation device for minimally invasive surgery of patients with cerebral hemorrhage. Background Technology

[0002] In the treatment of diseases such as hypertensive intracerebral hemorrhage, stereotactic minimally invasive puncture hematoma drainage is widely used due to its advantages such as minimal trauma and rapid recovery. The key to the success of this surgery lies in the precise placement of the puncture needle or catheter into the predetermined intracranial target point. Currently, in conventional surgeries, the patient's head is usually only simply restrained by the soft headband or sandbag that comes with the operating table, which has limited fixation effect.

[0003] However, during the procedure, even when the patient is under general anesthesia, unpredictable head displacement can still occur due to breathing movements, adjustments to the operating table, or slight touches from medical staff. Such minute displacements are catastrophic in stereotactic surgery, directly causing deviations from the puncture path, affecting not only the surgical outcome but also potentially damaging important neurovascular structures and leading to serious complications. Although high-precision stereotactic head frames (such as CRW and Leksell head frames) exist, their complex structure, cumbersome operation, and high cost, along with the need to implant fixation pins in the skull, increase patient trauma, surgical time, and expenses, making them difficult to popularize in primary hospitals or emergency surgeries requiring rapid intervention.

[0004] Therefore, there is an urgent need for a fixation device that falls between a simple headband and a complex stereotactic head frame, which can improve the universality and convenience of surgery while ensuring sufficient puncture accuracy. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an adjustable head fixation device for minimally invasive surgery in patients with cerebral hemorrhage. This device is simple, stable, and adjustable, thus solving the problems mentioned in the background section.

[0006] This utility model provides the following technical solution: an adjustable head fixation device for minimally invasive surgery of patients with cerebral hemorrhage, comprising a base plate, with sliders slidably connected to both sides of the top of the base plate, a limiting component for limiting the slider on one side, a side stop fixed on one side of the top of the slider, a curved rod at the top of the side stop, an adjustment component for adjusting the angle of the curved rod between the curved rod and the side stop, a soft pad firstly adhered to one side of the side stop and one side of the curved rod, an arc-shaped support plate fixed in the middle of the top of the base plate, a soft pad secondly adhered to the surface of the arc-shaped support plate, a forehead band on one side of the base plate, and an adjustment buckle connected to one end of the forehead band.

[0007] As a preferred technical solution of this utility model, the limiting component includes a nylon nut, which is fixedly connected to one side of the top of the slider. The nylon nut is threaded with a knob screw, and the bottom end of the knob screw is provided with a limiting plate to prevent the slider from shifting. The bottom end of the limiting plate is fixedly provided with an anti-slip plate.

[0008] As a preferred embodiment of this utility model, a groove coaxial with the nylon nut is provided on one side of the bottom end of the slider, and the limiting plate is located inside the groove.

[0009] As a preferred embodiment of this utility model, the adjusting component includes a friction plate one and a friction plate two. The bottom end of the friction plate one is fixedly connected to the top end of the side stop rod, and the top end of the friction plate two is fixedly connected to the bottom end of the curved rod. Both the surface of the friction plate one and the surface of the friction plate two are provided with through holes. A knob bolt is inserted through the through holes. The head of the knob bolt is provided with a wrench position. The threaded portion of the knob bolt is threadedly connected to a nylon nut two. A washer is provided on one side of the nylon nut two.

[0010] As a preferred embodiment of this utility model, the base plate has sliding grooves on both sides of its top end, and the slider is slidably connected to the inside of the sliding grooves.

[0011] As a preferred embodiment of the present invention, the surface of the forehead band is provided with a flexible protective strip, and the other end of the forehead band is connected to a support, and the bottom end of the support is fixedly provided with a protruding plate.

[0012] As a preferred technical solution of this utility model, the bottom end of the adjusting buckle is hinged to a support second, and the bottom end of the support second is fixedly provided with a convex plate second. One side of the convex plate first and one side of the convex plate second are both fixedly connected to one side of the base plate.

[0013] As a preferred embodiment of this utility model, the base plate has positioning and mounting holes at all four corners for installation, and a rubber pad is adhered to the bottom of the base plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This adjustable head fixation device for minimally invasive surgery of patients with cerebral hemorrhage uses a "three-point, one-surface" fixation system consisting of an arc-shaped support plate, dual adjustable clamping units (side stops and curved rods), and an independent forehead band. This effectively restricts head movement and provides a stable and reliable reference platform for stereotactic puncture, significantly reducing puncture errors caused by accidental head displacement. The slider can slide laterally along the groove, and the angle of the curved rod can be infinitely adjusted and locked, allowing the clamping units on both sides to quickly and accurately adapt to patients with different head circumferences and head shapes. The length of the forehead band can be adjusted independently, ensuring the device's wide applicability.

[0015] 2. This adjustable head fixation device for minimally invasive surgery of patients with cerebral hemorrhage employs a mature and simple mechanical structure, including mechanical sliding, friction locking, and straps. It eliminates the need for complex stereotactic coordinate frames and skull fixation screws. The components are easy to manufacture, significantly reducing manufacturing costs and the difficulty of sterilization and maintenance. All adjustment mechanisms use manual operation parts such as knobs and bolts, allowing medical staff to quickly complete fixation and adjustment. Its overall design is simple and particularly suitable for widespread use in primary hospitals, emergency surgeries, or environments with limited medical resources, helping to improve the safety and precision of minimally invasive cerebral hemorrhage surgery in such institutions. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the arc-shaped support plate of this utility model; Figure 4 This is a schematic diagram of the side stop bar of this utility model; Figure 5 This is a schematic diagram of the slider of this utility model; Figure 6 This is a cross-sectional structural diagram of the limiting component of this utility model; Figure 7 This is a schematic diagram of the structure of the adjustment component of this utility model.

[0017] In the diagram: 1. Base plate; 2. Slider; 3. Limiting assembly; 301. Nylon nut one; 302. Knob screw; 303. Limiting plate; 304. Anti-slip plate; 4. Side stop bar; 5. Curved rod; 6. Adjusting assembly; 601. Friction plate one; 602. Friction plate two; 603. Through hole; 604. Knob bolt; 605. Wrench position; 606. Nylon nut two; 607. Washer; 7. Arc-shaped support plate; 8. Soft pad one; 9. Forehead strap; 10. Flexible protective strip; 11. Soft pad two; 12. Slide groove; 13. Rubber pad; 14. Positioning mounting hole; 15. Groove; 16. Support one; 17. Protruding plate one; 18. Adjusting buckle; 19. Support two; 20. Protruding plate two. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-7 An adjustable head fixation device for minimally invasive surgery of patients with cerebral hemorrhage includes a base plate 1. Slider blocks 2 are slidably connected to both sides of the top of the base plate 1. A limiting component 3 is provided on one side of each slider 2 to limit its movement. A side stop bar 4 is fixed to one side of the top of the slider 2. A curved rod 5 is located at the top of the side stop bar 4. An adjustment component 6 for adjusting the angle of the curved rod 5 is located between the curved rod 5 and the side stop bar 4. A soft pad 8 is adhered to one side of the side stop bar 4 and one side of the curved rod 5 to provide cushioning and anti-slip properties when in contact with the temporal side of the patient's head. An arc-shaped support plate 7, adapted to the physiological curvature of the occipital region, is fixed to the middle of the top of the base plate 1 to support the head. A soft pad 11 is adhered to the surface of the arc-shaped support plate 7 to increase comfort. A forehead band 9 is provided on one side of the base plate 1 to restrain the head. The forehead band 9 has an adjustment buckle 18 at one end for adjusting its tightness and length. Through the above technical solution, the patient's head is placed on the arc-shaped support plate 7. The side blocks 4 are brought close to the sides of the head by sliding the sliders 2 on both sides. The position of the sliders 2 is locked by the limiting component 3. Then, the angle of the curved rod 5 is adjusted by the adjusting component 6 to better fit the temporal curve of the head and is locked. Finally, the forehead band 9 is tightened and fixed by the adjustment buckle 18 so that it covers the patient's forehead. Thus, through the synergistic effect of the arc-shaped support plate 7, the adjustable clamping units on both sides (side blocks 4 and curved rod 5) and the forehead band 9, a stable "three-point and one-surface" fixation of the head is achieved, which effectively restricts the movement of the head in all directions and provides a stable operating platform for stereotactic puncture. In this embodiment, preferably, the limiting component 3 includes a nylon nut 301, which is fixedly connected to one side of the top of the slider 2. The nylon nut 301 is threadedly connected to a knob screw 302. The bottom end of the knob screw 302 is provided with a limiting plate 303 to prevent the slider 2 from shifting. The bottom end of the limiting plate 303 is fixedly provided with an anti-slip plate 304. When the knob screw 302 is tightened, the limiting plate 303 is pressed down, and a huge frictional force is generated between the anti-slip plate 304 and the surface of the base plate 1, thereby firmly locking the slider 2. A groove 15 coaxial with the nylon nut 301 is opened on one side of the bottom end of the slider 2. The limiting plate 303 is located inside the groove 15. This design makes the limiting component 3 more compact, can accommodate the limiting plate 303, and can ensure the lifting and lowering movement of the limiting plate 303. In this embodiment, preferably, the adjustment component 6 includes a friction plate 1 601 and a friction plate 2 602. The bottom end of the friction plate 1 601 is fixedly connected to the top end of the side stop bar 4, and the top end of the friction plate 2 602 is fixedly connected to the bottom end of the curved rod 5. Both the surface of the friction plate 1 601 and the surface of the friction plate 2 602 are provided with through holes 603. A knob bolt 604 is inserted through the through holes 603. The head of the knob bolt 604 is provided with a wrench position 605. The threaded part of the knob bolt 604 is threadedly connected to a nylon nut 2 606. A washer 607 is provided on one side of the nylon nut 2 606. By tightening or loosening the knob bolt 604, the friction force between the friction plate 1 601 and the friction plate 2 602 can be changed, thereby realizing the stepless adjustment and locking of the angle of the curved rod 5 to adapt to the needs of different head shapes and surgical positions (such as supine or lateral positions). In this embodiment, preferably, both sides of the top of the base plate 1 are provided with sliding grooves 12, and the slider 2 is slidably connected to the inside of the sliding grooves 12. The sliding grooves 12 provide precise guidance for the movement of the slider 2 and limit it to sliding only in the horizontal direction, thereby improving the stability and symmetry of the adjustment. The four corners of the base plate 1 are provided with positioning mounting holes 14 for installation. The entire fixture can be installed on the guide rail or table of the operating table by fasteners such as bolts to prevent the whole unit from moving. The bottom of the base plate 1 is bonded with a rubber pad 13 to increase the friction with the placement surface and at the same time play a role in shock absorption and anti-slip. In this embodiment, preferably, the surface of the forehead band 9 is provided with a flexible protective strip 10, which directly contacts the patient's forehead skin to distribute pressure, increase comfort, and prevent slippage. The other end of the forehead band 9 is connected to a support 16. The bottom end of the support 16 is fixedly provided with a protruding plate 17. The bottom end of the adjusting buckle 18 is hinged to a support 19. The bottom end of the support 19 is fixedly provided with a protruding plate 20. One side of the protruding plate 17 and one side of the protruding plate 20 are both fixedly connected to one side of the base plate 1. The forehead band 9 is independently and rigidly fixed to the front edge of the base plate 1 through the support 16 and the support 29, forming an independent constraint point with the forehead band 9. Its tightness adjustment does not affect the clamping units on both sides, ensuring the reliability and stability of the fixation system and preventing the coupling and mutual interference of the constraint functions.

[0020] When in use, the fixture is securely installed on the head rail of the operating table or a suitable table surface through the positioning mounting hole 14 at the bottom of the base plate 1 using standard operating table accessory bolts, ensuring that its position is centered, the rubber pad 13 is in good contact with the table surface, and confirming that the limiting components 3 of the sliders 2 on both sides are in the loose state (the knob screw 302 is loosened), the adjusting components 6 on both sides are in the movable state (the knob bolt 604 is slightly loosened), and the adjusting buckle 18 of the forehead strap 9 is in the loose state. Gently place the patient's head on the curved support plate 7, ensuring that the back of the head is in full contact with the soft pad 11. Adjust the head position to keep it in the center, that is, the tip of the nose, the manubrium of the sternum, and the pubic symphysis are roughly on a vertical line. Hold the side stop bar 4 on the upper part of the slider 2 and slide it smoothly inward (towards the head) along the slide groove 12 until the soft pads 8 on both sides of the side stop bar 4 gently contact the temporal region on both sides of the patient's head. Be careful to keep the movement symmetrical on both sides. After both soft pads 8 have contacted the head and the pressure is moderate, tighten the knob screws 302 on both sides respectively. When tightening, the limiting plate 303 presses down, and the anti-slip plate 304 at its bottom generates a huge static friction force with the surface of the base plate 1, thereby firmly locking the slider 2 in the current position and preventing it from sliding left and right.

[0021] Observe the side profile of the patient's head. For most patients in the supine position, it may be necessary to adjust the curved rod 5 to a certain angle with the side stop bar 4 to better fit the temporoparietal curve of the head. During the operation, hold the curved rod 5 with one hand to make it reach the ideal angle, and use the other hand to manually or with a tool to insert the wrench position 605 on the head of the knob bolt 604 and tighten it. During the tightening process, the pressure between friction plate one 601 and friction plate two 602 increases, and the friction increases accordingly, thereby fixing the angle of the curved rod 5. This adjustment can achieve stepless positioning. Place the forehead band 9 in the center of the patient's forehead, gently press down the flexible protective strip 10 with one hand, and pull the free end of the forehead band 9 (through the adjusting buckle 18) with the other hand to make the forehead band 9 moderately taut. The tautness should be such that it can gently and steadily restrict the head from moving forward, without causing excessive skin sinking or discomfort to the patient. Operate the adjusting buckle 18 to lock the forehead band 9 at the current length. After the above fixation is completed, a final check is performed. The patient's head is gently pushed by hand to check whether it is effectively restricted in the front-back and left-right directions. The forehead band 9 is checked to ensure that all soft pads (soft pad 1 8, soft pad 2 11, flexible protective strip 10) are in full contact with the skin without excessive local pressure. It is confirmed that no hard parts are directly pressing on sensitive areas such as the auricle and eye socket. At this point, the head fixation is completed, and subsequent stereotactic frame installation, coordinate registration, and puncture surgery can be performed. After the surgery, loosen the adjustment buckle 18 of the forehead band 9 to release the forehead restraint, loosen the knob bolts 604 of the two side adjustment components 6 to return the curved rod 5 to its original position, loosen the knob screws 302 of the two side limiting components 3, slide the two side sliders 2 outward along the slide groove 12 to leave enough space, and gently remove the patient's head.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage, comprising a base plate (1), characterized in that: Both sides of the top of the base plate (1) are slidably connected to sliders (2). A limiting component (3) is provided on one side of the slider (2) to limit its movement. A side stop bar (4) is fixedly provided on one side of the top of the slider (2). A curved rod (5) is provided at the top of the side stop bar (4). An adjustment component (6) for adjusting the angle of the curved rod (5) is provided between the curved rod (5) and the side stop bar (4). A soft pad (8) is glued to one side of the side stop bar (4) and one side of the curved rod (5). An arc-shaped support plate (7) is fixedly provided in the middle of the top of the base plate (1). A soft pad (11) is glued to the surface of the arc-shaped support plate (7). A forehead band (9) is provided on one side of the base plate (1). An adjustment buckle (18) is connected to one end of the forehead band (9).

2. The adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage according to claim 1, characterized in that: The limiting component (3) includes a nylon nut (301), which is fixedly connected to one side of the top of the slider (2). The nylon nut (301) is threaded with a knob screw (302). The bottom end of the knob screw (302) is provided with a limiting plate (303) to prevent the slider (2) from shifting. The bottom end of the limiting plate (303) is fixedly provided with an anti-slip plate (304).

3. The adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage according to claim 2, characterized in that: The bottom of the slider (2) has a groove (15) coaxial with the nylon nut (301) on one side, and the limiting plate (303) is located inside the groove (15).

4. The adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage according to claim 1, characterized in that: The adjustment component (6) includes a friction plate one (601) and a friction plate two (602). The bottom end of the friction plate one (601) is fixedly connected to the top end of the side stop (4), and the top end of the friction plate two (602) is fixedly connected to the bottom end of the curved rod (5). Both the surface of the friction plate one (601) and the surface of the friction plate two (602) are provided with through holes (603). A knob bolt (604) is inserted through the through hole (603). The head of the knob bolt (604) is provided with a wrench position (605). The threaded part of the knob bolt (604) is threadedly connected to a nylon nut two (606). A washer (607) is provided on one side of the nylon nut two (606).

5. The adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage according to claim 1, characterized in that: The base plate (1) has grooves (12) on both sides of its top end, and the slider (2) is slidably connected to the inside of the grooves (12).

6. The adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage according to claim 1, characterized in that: The forehead band (9) has a flexible protective strip (10) on its surface. The other end of the forehead band (9) is connected to a support (16), and the bottom end of the support (16) is fixedly provided with a protruding plate (17).

7. The adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage according to claim 6, characterized in that: The bottom end of the adjusting buckle (18) is hinged to a support two (19), and the bottom end of the support two (19) is fixedly provided with a convex plate two (20). One side of the convex plate one (17) and one side of the convex plate two (20) are both fixedly connected to one side of the base plate (1).

8. The adjustable head position fixation device for minimally invasive surgery of patients with cerebral hemorrhage according to claim 1, characterized in that: The base plate (1) has positioning and mounting holes (14) at all four corners for installation, and a rubber pad (13) is attached to the bottom of the base plate (1).

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