Neurosurgery ventricular puncture positioning external fixing frame

Abstract

The invention discloses a neurosurgery ventricular puncture positioning external fixing frame, and relates to the technical field of medical equipment, in particular to a neurosurgery ventricular puncture positioning external fixing frame which comprises an arc-shaped positioning base, a bonding layer is arranged at the lower end of the arc-shaped positioning base, an elastic bandage is arranged at the side end of the arc-shaped positioning base, and the arc-shaped positioning base is used for being fixed to the head of a patient. The upper end of the base is provided with a sliding guide rail sliding in the direction of the center line or the coronary seam, and the guide rail is fixed through a locking structure. The inner side of the guide rail is connected with a puncture needle fixing sleeve through an angle adjusting clamp, and the angle adjusting clamp can adjust and lock the angle of the puncture needle, so that the puncture needle can be accurately aligned with target positions such as an external auditory canal connecting line, a hairline or a position 2cm in front of a coronary suture and a position 3cm beside a midline. A replaceable elastic lining is arranged in the puncture needle fixing sleeve so as to be matched with puncture needles of different specifications. A scale area is arranged on the surface of the base, and the angle adjusting clamp is integrated with an angle dial, so that accurate positioning and reproduction are facilitated. The device is stable in structure, easy and convenient to operate and capable of effectively improving the puncture precision and safety.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a neurosurgical ventricle puncture positioning external fixator. Background Technology

[0002] Ventricular puncture is a fundamental and crucial procedure in neurosurgical clinical practice. Its purpose is to puncture the lateral ventricle for diagnostic and therapeutic purposes such as draining cerebrospinal fluid, monitoring intracranial pressure, administering medications, or performing ventriculography. Traditional ventricular puncture, especially the classic frontal horn puncture method, heavily relies on the surgeon's experience and anatomical knowledge. Before the puncture, the surgeon needs to mark the patient's scalp. Common positioning methods include determining the puncture point 2 cm anterior to the coronal suture and 3 cm lateral to the midline, with the puncture direction parallel to the sagittal plane (midline plane), aligned with the line connecting the external auditory canals. Despite long-term practice, this manual procedure still faces numerous challenges and potential risks.

[0003] First, individual anatomical structures vary, such as skull size, shape, skull thickness, and the size and location of the ventricles. Traditional surface landmarks are fixed empirical formulas, making individual adaptation difficult and potentially leading to deviations between the puncture path and the intended target. Even slight errors in puncture depth and angle can cause the needle to fail to enter the ventricle, or more seriously damage important structures surrounding the ventricle, such as the internal capsule, thalamus, and major blood vessels, resulting in serious complications such as hemorrhage and neurological deficits.

[0004] Secondly, the stability of the surgical procedure is difficult to guarantee. During the puncture, especially when encountering resistance from the skull, the surgeon's hand holding the needle may unconsciously tremble or shift slightly. Furthermore, in some cases requiring fixation of the puncture needle for continuous drainage or monitoring, the lack of an effective fixation device in the head makes the needle prone to displacement or even dislodgement due to unconscious patient movement, changes in position, or external traction. This not only leads to operative failure but also increases the risk of infection and injury.

[0005] To address these issues, several auxiliary positioning devices have emerged in the existing technology. For example, some solutions employ 3D reconstruction and navigation technology based on preoperative images (such as CT and MRI), achieving real-time guidance by registering the image coordinate system with the patient's head. These neuronavigation systems offer high accuracy, but are expensive, involve complex procedures, are time-consuming, and have specific requirements for operating room hardware, making them difficult to popularize in primary hospitals or for applications requiring rapid procedures, such as in emergency departments. Other solutions provide mechanical positioning frames, but these devices are often complex in structure, bulky, or require invasive fixation methods such as head frames or skull screws, increasing patient trauma and surgical preparation time. There are also some simple guiding devices with insufficient fixation stability, or inadequate and intuitive angle and depth adjustments, and lack an effective design for rapid, secure, and non-invasive fixation on the patient's scalp, thus their clinical practicality and convenience need improvement.

[0006] Therefore, there is an urgent clinical need for a ventricular puncture assist device that is relatively simple in structure, cost-effective, quick to operate, accurately positioned, and capable of providing stable fixation during the procedure and reliable short-term external fixation afterward. This device should be compatible with traditional surface landmarks for easy mastery by physicians, while also possessing adjustable angle and position to accommodate different patients and puncture pathways. Furthermore, it should be securely and comfortably fixed to the patient's head to ensure stability during the puncture process and subsequent treatment. Summary of the Invention

[0007] The purpose of this invention is to provide a neurosurgical ventricle puncture positioning external fixator, which, through a sliding guide rail, an adjustable and locking puncture needle fixation sleeve and an angle adjustment structure, combined with surface adhesive and bandage fixation, achieves rapid and accurate positioning and stable fixation of the puncture point, thereby improving the puncture success rate and operational safety.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a neurosurgical ventricle puncture positioning external fixator, comprising an arc-shaped base with a specific curvature, wherein a track is provided on the top edge of the arc-shaped base that can slide along its extension direction, a cylindrical fixator for accommodating and clamping puncture instruments is installed in the inner region of the track, and an angle adjustment device capable of changing and locking the relative orientation is connected between the track and the cylindrical fixator.

[0009] Furthermore, the bottom contact surface of the arc-shaped base is covered with a layer of adhesive adhesive material, and elastic restraints extend from one or both sides of the arc-shaped base to assist in the attachment and fixation of the overall device to the skull surface.

[0010] Furthermore, a measuring scale is etched or printed on the visible surface of the arc-shaped base. The scale lines are mainly arranged along the central axis of symmetry of the base and the direction simulating the coronal suture of the human skull, thus serving as a reference for determining the initial placement position of the puncture instrument.

[0011] Furthermore, the track can reciprocate along the direction of the central symmetry axis defined by the arc-shaped base or the direction simulating the coronal suture, and after moving to the desired position, it can be secured there by an independent locking mechanism, thereby adapting to different expected puncture entry positions.

[0012] Furthermore, the angle adjustment device is connected to both the track and the tubular fixator, and can adjust and ultimately lock the tilt angle of the puncture instrument held by the tubular fixator, so that the tip of the instrument can be precisely pointed to an anatomical target point defined by a specific distance from the line connecting the external auditory canal, the hairline, the anterior coronal suture, and the midline of the base.

[0013] Furthermore, the overall structure of the arc-shaped base is made of a high-molecular polymer material that meets medical safety standards and is manufactured through a one-time mold injection molding process. This material and manufacturing method ensure compatibility with human tissues and the mechanical strength required by the device itself.

[0014] Furthermore, the cylindrical retainer for accommodating puncture instruments has a removable and replaceable elastic liner embedded inside, which has different inner diameters to match and stably clamp various puncture instruments with different rod diameters.

[0015] Furthermore, the angle adjustment device integrates a disc-shaped scale with an angle indicator, which is used to accurately display during the adjustment process and allow the operator to record and restore the specific tilt angle achieved by the cylindrical retainer.

[0016] Furthermore, at both ends of the path through which the track is allowed to slide, a raised physical blocking structure is provided to prevent the cylindrical retainer installed on the track from accidentally dislodging from the effective working range of the arc-shaped base during sliding.

[0017] Furthermore, a protective film that can be easily peeled off covers the surface of the adhesive dressing material. Removing this film before use exposes the adhesive layer. Meanwhile, the two ends of the elastic bandage are equipped with hook and loop fasteners that can be glued and detached from each other, so as to facilitate quick binding, fixation and tightness adjustment around the patient's head.

[0018] This invention provides a neurosurgical ventricle puncture positioning external fixator, which has the following beneficial effects: 1. The core benefit of this device lies in its significantly improved accuracy and ease of operation during ventriculoperitoneal puncture surgery. Through its innovative arc-shaped positioning base design, the curvature conforms to the physiological curvature of the patient's scalp, providing a stable physical reference for the entire system. The midline and coronal suture direction markings on the base surface, combined with a sliding guide along this path, allow for quick and intuitive alignment of the puncture reference point with standard anatomical landmarks (such as the sagittal suture, coronal suture, or Kocher point). This eliminates the need for repeated freehand measurements and drawing, allowing the surgeon to directly establish a precise coordinate system on the body surface. Especially for patients with indistinct skull landmarks or in emergency rescue scenarios, this device can significantly shorten preoperative positioning preparation time, reduce initial positioning errors caused by visual estimation and estimation, and lay a reliable foundation for subsequent accurate puncture.

[0019] This device achieves precise, quantifiable adjustment and stable locking of the puncture angle in three-dimensional space, which is another key beneficial effect. A flexible angle adjustment mechanism is formed by connecting the sliding guide rail and the puncture needle fixing sleeve via a dedicated angle adjustment clip. The angle dial integrated into the adjustment clip allows the operator to precisely set and reproduce the sagittal and coronal angles of the puncture needle based on the optimal puncture path calculated from preoperative CT or MRI images. After the puncture needle is fixed, the entire adjustment-locking system effectively counteracts needle path deviation that may be caused by soft tissue resistance during puncture, ensuring that the needle tip enters the target ventricle along the preset trajectory. This mechanized angle control, compared to traditional methods that rely entirely on the operator's "feel" and experience, significantly improves the controllability and repeatability of the puncture path, reducing the risk of puncture failure or damage to surrounding important brain tissue due to angle deviation.

[0020] This device achieves precise positioning while also enhancing its adaptability to diverse individual differences and intraoperative needs, thereby improving its clinical practicality. Firstly, the sliding guide can slide extensively along the midline of the base or the direction of the coronal suture and is fixed by a locking structure. This accommodates changes in puncture point position due to variations in patient age, head circumference, and puncture target points (such as the frontal and occipital angles). Secondly, the replaceable elastic bushing within the puncture needle fixation sleeve is compatible with various diameter puncture needles or drainage tubes, avoiding the need for custom-made fixation components for different instrument sizes. Thirdly, the adhesive layer at the lower end of the base and the elastic bandage at the side constitute a dual fixation mechanism. This allows for initial non-invasive fixation via adhesive and further reinforcement around the head using Velcro bandages, ensuring stable attachment of the device under various head shapes and positions, preventing intraoperative displacement, and guaranteeing the continuous effectiveness of the positioning effect.

[0021] The design of this device in terms of structure and materials fully considers the requirements of aseptic technique, safety, and operational efficiency in neurosurgery, resulting in numerous clinical benefits. The arc-shaped positioning base is integrally injection-molded from medical-grade polymer material, ensuring good biocompatibility, non-cytotoxicity, and a smooth surface for easy sterilization (such as alcohol wiping or low-temperature plasma sterilization). The integral molding process also ensures sufficient structural strength and lightweight, preventing deformation under intraoperative stress. The limiting protrusion at the end of the sliding guide prevents accidental slippage of the puncture needle fixation sleeve, improving operational safety. The peelable protective film on the adhesive layer maintains the initial tack of the adhesive while facilitating rapid preoperative aseptic procedures. These detailed design features work together to make this device not only accurately positioned but also a safe, reliable, and disposable or reusable sterile instrument that meets operating room standards, optimizing the surgical process.

[0022] In summary, this device, through its integrated and modular mechanical design, consolidates the multiple, experience-dependent steps (surface marking for positioning, angle estimation, and puncture fixation) of traditional ventriculoperitoneal puncture into a compact and intuitive physical carrier, producing significant synergistic benefits. It transforms abstract imaging coordinates and puncture vectors into concrete guide rail position scales and angle dial readings, achieving a precise mapping of surgical planning from "virtual" to "physical." This integration not only lowers the technical threshold and variability of the surgical procedure, enabling junior surgeons to perform such procedures more safely after standardized training, but also helps shorten surgical time and reduce the pain and risks suffered by patients due to repeated puncture adjustments. In the long term, the widespread application of this device will help promote the standardization of ventriculoperitoneal puncture techniques, improve the consistency of surgical success rates and patient prognoses, and has significant clinical value and educational significance. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 For the present invention Figure 2 A magnified structural diagram of A in the middle; Figure 4 This is a schematic diagram of the overall structure of the present invention. Figure 3 .

[0025] Part Name: 1. Arc-shaped positioning base; 2. Sliding guide rail; 3. Puncture needle fixing sleeve; 4. Angle adjustment clip; 5. Adhesive layer; 6. Elastic strap. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] How to use: Step 1. Preoperative preparation and localization marking With the patient in a supine position, the patient's head is positioned on the surface according to the puncture approach (e.g., frontal horn puncture approach). Typically, the coronal suture, sagittal suture (midline), and key anatomical landmarks are marked on the puncture side, such as the line connecting the external auditory canals, the hairline, or 2cm anterior to the coronal suture (approximately 12cm above the root of the nose), or 3cm lateral to the midline, serving as reference points for subsequent procedures.

[0029] Step 2. Installation and initial positioning of the mounting bracket Remove the neurosurgical ventricle puncture positioning external fixator. Place the arc-shaped positioning base 1 on the puncture area of ​​the patient's head. Initially adhere and fix it using the adhesive layer 5 at the lower end of the arc-shaped positioning base 1. The protective film covering the adhesive layer 5 must be removed before use. To ensure stability, the elastic band 6 on the side end of the arc-shaped positioning base 1 can be wrapped around the patient's head and tightened and fixed using the Velcro structure at both ends of the elastic band 6, so that the arc-shaped positioning base 1 fits tightly against the scalp and does not shift.

[0030] Step 3. Use the scale area for reference alignment. Observe and utilize the graduated area on the outer surface of the arc-shaped positioning base 1. Align the midline graduation on the arc-shaped positioning base 1 with the sagittal suture (midline) of the patient's head, or align the graduation in the coronal suture direction with the coronal suture of the patient's head. This step aims to ensure an accurate correspondence between the position of the arc-shaped positioning base 1 on the scalp and the intracranial anatomy, providing a correct spatial reference for subsequent sliding and angle adjustment.

[0031] Step 4. Adjust the horizontal position of the puncture needle. Based on the preoperatively determined puncture point (e.g., 2 cm anterior to the coronal suture), slide the sliding guide 2 along the midline of the arc-shaped positioning base 1 or in the direction of the coronal suture. The sliding guide 2 can move along the arc path of the arc-shaped positioning base 1 until the central axis of the puncture needle retainer 3 is aligned with the target puncture point on the horizontal plane. After the position is determined, it is fixed by the locking structure of the sliding guide 2. The limiting protrusion at the end of the sliding path of the sliding guide 2 can prevent excessive sliding and accidental dislodgement of the puncture needle retainer 3.

[0032] Step 5. Adjust and lock the puncture angle. Operate the angle adjustment clip 4 connecting the sliding guide rail 2 and the puncture needle fixing sleeve 3. Loosen the locking mechanism of the angle adjustment clip 4, and adjust the pointing angle of the puncture needle fixing sleeve 3 in three-dimensional space according to the surgical plan (e.g., the puncture needle needs to point in the direction of the line connecting the external auditory canal). You can refer to the angle scale integrated on the angle adjustment clip 4 for precise angle setting. After the angle adjustment is completed, lock the angle adjustment clip 4 to completely fix the angle of the puncture needle fixing sleeve 3.

[0033] Step 6. Install the puncture needle Select the appropriate size of puncture needle according to the needs of the surgery. Insert the puncture needle into the puncture needle retainer 3. The puncture needle retainer 3 has a replaceable elastic bushing whose inner diameter is adapted to the rod diameter of various sizes of puncture needles. It can not only firmly hold the puncture needle to prevent it from shaking or sliding, but also avoid scratching the surface of the puncture needle.

[0034] Step 7. Puncture procedure After confirming that the arc-shaped positioning base 1 is securely fixed and that the horizontal position and angle of the puncture needle fixing sleeve 3 are accurate, the operator can hold the puncture needle and smoothly perform the puncture operation along the direction and path set by the puncture needle fixing sleeve 3. The puncture needle will enter the ventricle along the predetermined trajectory.

[0035] Step 8. Postoperative disassembly After the puncture procedure is completed, loosen the Velcro structure of the elastic bandage 6 and remove the elastic bandage 6 from the patient's head. Then carefully peel the arc-shaped positioning base 1 from the adhesive layer 5 and remove the external fixator. The adhesion area can then be cleaned.

[0036] Example: Example 1: Clinical application of an external fixator for ventricular puncture positioning in neurosurgery. This device is used when a lateral ventricle frontal horn puncture is required. First, key anatomical landmarks such as the sagittal suture and coronal suture are marked on the patient's head. The external fixator is removed, and the protective film on the adhesive layer 5 at the lower end of the arc-shaped positioning base 1 is removed. The base is then applied to the puncture side of the patient's forehead, ensuring that the curvature of the arc-shaped positioning base 1 conforms to the curvature of the coronal plane of the head. Next, the elastic band 6 at the side end of the arc-shaped positioning base 1 is wrapped around the head and secured with Velcro at its end, achieving initial stability of the device. Subsequently, the surgeon, referring to the scale area on the outer surface of the arc-shaped positioning base 1, precisely aligns the midline scale with the sagittal suture of the patient's head, completing the baseline positioning of the device. According to the preoperative plan, the puncture entry point is determined to be located at an appropriate distance lateral to the midline of the coronal suture. The operator slides the sliding guide rail 2 along the arc-shaped positioning base 1, moving the puncture needle fixing sleeve 3 horizontally until it aligns with the target puncture point, and then locks the sliding guide rail 2. Next, by adjusting the angle adjustment clip 4 connecting the sliding guide rail 2 and the puncture needle fixing sleeve 3, the spatial orientation of the puncture needle fixing sleeve 3 is changed, aiming it at the preset target point in front of the tragus. The angle is precisely set with reference to the angle scale integrated on the angle adjustment clip 4, and finally, the angle adjustment clip 4 is locked. The selected puncture needle shaft is inserted into the puncture needle fixing sleeve 3, where the elastic bushing provides a stable clamping fit. After confirming that all positioning is correct, the operator smoothly inserts the needle along the direction guided by the puncture needle fixing sleeve 3, completing the puncture. After the procedure, the elastic bandage 6 is loosened, and the device is carefully removed.

[0037] Example 2: Another application of a neurosurgical ventricle puncture positioning external fixator. In this case, the surgical plan used a transcoronal suture approach. Preoperatively, the coronal suture and midline were clearly marked on the head surface. During device installation, the arc-shaped positioning base 1 was placed in the cranial vault region, utilizing its arc design to conform to the coronal plane contour of the head. Double fixation was achieved using an adhesive layer 5 and elastic bandages 6 to ensure the device would not slip during subsequent procedures. For positioning, the base was aligned with the patient's actual coronal suture based on the graduated areas distributed along the coronal suture direction on the arc-shaped positioning base 1. After determining the puncture point was located at a point on the coronal suture, the sliding guide 2 was moved along the coronal suture direction on the arc-shaped positioning base 1, moving the puncture needle fixation sleeve 3 above that point and locking the sliding guide 2. Next, the angle adjustment clip 4 was adjusted, using the contralateral medial canthus as the intracranial target, and the tilt angle of the puncture needle fixation sleeve 3 was finely adjusted and locked with the aid of the angle scale. The puncture needle is inserted into the elastic bushing of the puncture needle retainer 3. Because the sliding guide rail 2 has a limiting protrusion at its end, the risk of the puncture needle retainer 3 slipping off the end of the rail during adjustment is avoided. The operator can then perform the puncture; the device provides a stable path guide for the puncture needle.

[0038] Example 3: An embodiment of using the same neurosurgical ventricle puncture positioning external fixator for different puncture targets. This example demonstrates how the adjustability of the device adapts to different surgical procedures. After the device is secured to the patient's head via the adhesive layer 5 and elastic bandage 6, the arc-shaped positioning base 1 provides a stable operating platform. When the initial puncture target is selected as a landmark in front of the tragus, the surgeon first slides the sliding guide 2 to adjust the horizontal position of the puncture needle fixing sleeve 3, and then adjusts and locks the angle pointing towards the target point using the angle adjustment clip 4 to complete the first puncture. Subsequently, if a second puncture is required in the same surgical area, and the target point is changed to a point near the midline, the surgeon does not need to disassemble the entire device. Simply unlock the sliding guide 2, slide it along the arc-shaped positioning base 1 to the new horizontal position and lock it; then unlock the angle adjustment clip 4, readjust the angle of the puncture needle fixing sleeve 3 towards the new target point and lock it again. The elastic bushing inside the puncture needle fixing sleeve 3 can be adapted to puncture needles of the same diameter, facilitating replacement or reuse. This process demonstrates the device's repeatable adjustability in horizontal position and angle, enabling it to meet the needs of multi-target puncture.

[0039] Example 4: This embodiment describes an external fixator for neurosurgical ventricle puncture positioning, designed to ensure puncture safety. The embodiment focuses on how the device's structural design prevents operational errors. After the device is fixed to the patient's head, the arc-shaped positioning base 1 serves as the foundation, its medical-grade polymer material ensuring both safety and strength. When adjusting the horizontal position of the puncture needle fixation sleeve 3, the sliding guide 2 slides on the arc-shaped positioning base 1. A limiting protrusion at the end of its sliding path effectively prevents the puncture needle fixation sleeve 3 from accidentally detaching from the arc-shaped positioning base 1 due to excessive sliding during operation, avoiding potential positioning failure or damage. During angle adjustment, the angle adjustment clip 4 integrates an angle scale, allowing for precise angle setting rather than estimation, facilitating recording and reproduction, and reducing the risks associated with angle deviations. The elastic bushing inside the puncture needle fixation sleeve 3 securely holds the puncture needle while preventing wear or indentation that might occur with rigid fixation. These design features collectively enhance the controllability and safety of the puncture process.

[0040] Example 5: This invention presents an example of a rapid preoperative installation and positioning device for a neurosurgical ventricle puncture positioning external fixator. This example emphasizes the ease of operation of the device. During preoperative preparation, the device is removed; the arc-shaped positioning base 1 is pre-formed and requires no temporary assembly. After removing the protective film of the adhesive layer 5, the arc-shaped positioning base 1 can be attached to the predetermined area on the patient's scalp. The Velcro structure of the elastic band 6 allows for quick and adjustable fixation around the head, enabling a single operator to complete a stable installation of the device in a short time. After installation, the coronal suture or midline scale on the surface of the arc-shaped positioning base 1 can be quickly aligned with the corresponding surface landmarks on the patient, completing the reference registration of the device. Subsequently, the surgeon can smoothly perform subsequent adjustments to the position of the sliding guide 2 and the angle of the angle adjustment clip 4. The entire installation and preliminary positioning process is clear and fluid, reducing reliance on complex measuring tools or other auxiliary positioning equipment, which is beneficial for quickly establishing an accurate puncture channel in emergency or routine surgeries.

[0041] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A neurosurgical ventricle puncture positioning external fixator, comprising an arc-shaped positioning base (1), characterized in that: The upper end of the arc-shaped positioning base (1) is provided with a sliding guide rail (2), the inner side of the sliding guide rail (2) is provided with a puncture needle fixing sleeve (3), and an angle adjustment clip (4) is provided between the sliding guide rail (2) and the puncture needle fixing sleeve (3).

2. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The lower end of the arc-shaped positioning base (1) is provided with an adhesive layer (5), and the side end of the arc-shaped positioning base (1) is provided with an elastic strap (6).

3. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The outer surface of the arc-shaped positioning base (1) is provided with a scale area, and the scale is distributed along the center line of the base and the direction of the coronal suture to mark the puncture reference position.

4. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The sliding guide rail (2) can slide along the centerline of the arc-shaped positioning base (1) or the direction of the coronal suture. After sliding, the position is fixed by the locking structure to adapt to different puncture point requirements.

5. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The angle adjustment clip (4) is connected to the sliding guide rail (2) and the puncture needle fixing sleeve (3), which can adjust and lock the angle of the puncture needle so that it is aligned with the external auditory canal line, the hairline or 2cm in front of the coronal suture and 3cm beside the midline of the base.

6. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The arc-shaped positioning base (1) is integrally injection molded from medical-grade polymer material, possessing both biocompatibility and structural strength.

7. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The puncture needle fixing sleeve (3) is provided with a replaceable elastic bushing, the inner diameter of which is adapted to the rod diameter of various puncture needles.

8. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The angle adjustment clip (4) integrates an angle scale, which is used to accurately mark and reproduce the angle adjusted by the puncture needle fixing sleeve (3).

9. The neurosurgical ventricle puncture positioning external fixator according to claim 1, characterized in that: The sliding guide rail (2) has a limiting protrusion at the end of its sliding path to prevent the puncture needle fixing sleeve (3) from accidentally coming off the arc-shaped positioning base (1).

10. The neurosurgical ventricle puncture positioning external fixator according to claim 2, characterized in that: The adhesive layer (5) is covered with a peelable protective film that can be removed before use to expose the adhesive. The elastic bandage (6) has matching Velcro structures at both ends for quick fixation and adjustment on the patient's head.

Images