Low material consumption practical simple neuroendoscope sleeve

Abstract

The utility model relates to a kind of low material effective type simple neuroendoscope sleeve, including sleeve main body and the double-lumen catheter of insertion sleeve main body inside, sleeve main body front end is provided with arc section, double-lumen catheter includes coaxially arranged main cavity and annular auxiliary cavity, annular auxiliary cavity front end is connected annular air bag by hot-pressing, tail end is connected inflation device by luer joint, double-lumen catheter tail end outer wall is fixedly connected with limit ring, and sleeve main body is equipped with magnetic attraction type limiting mechanism between limit ring;Concentric double-lumen design ensures that operating channel is unobstructed, magnetic attraction type limiting mechanism realizes quick positioning, combined with the concentric unobstructed form after air bag inflation, form stable unobstructed operation space, ensure clear vision, and avoid repeatedly adjusting position;Meanwhile, pressure indicator real-time monitoring air bag pressure, multi-dimension reduces tissue damage risk.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a simple, low-consumer-cost, high-efficiency neuroendoscopy sleeve. Background Technology

[0002] In clinical treatment, neuroendoscopic surgery requires the establishment of a stable working channel through a sleeve to insert the endoscope and surgical instruments for lesion resection, hemostasis, and irrigation. As the core carrier of the surgical pathway, the performance of the sleeve directly affects the following clinical indicators. Currently used sleeves, such as the self-made simplified neuroendoscopic surgical sleeve disclosed in patent number CN215191380U, feature a transparent outer sleeve and inner tube combination structure. Relying on a mechanical locking structure of blocks and slots, the sleeve is prone to displacement due to instrument vibration during surgery, and single-handed operation is difficult, increasing surgical risks. Furthermore, the single-lumen design cannot simultaneously achieve irrigation and suction, requiring repeated instrument changes and prolonging surgical time. In addition, the metal sleeves commonly used in existing technologies require sterilization and reuse, posing a risk of cross-infection; while disposable expandable catheters are expensive. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In view of the limitations of existing neuroendoscopic sleeves, the purpose of this invention is to provide a simple, low-consumer, and efficient neuroendoscopic sleeve. The concentric double-lumen design of the double-lumen catheter ensures unobstructed access to the surgical field, while a magnetic positioning mechanism (a permanent magnet ring on the sleeve body + a magnetic locating plate on the locating ring) enables rapid positioning, accurately limiting the position of the double-lumen catheter within the sleeve body. This prevents over-insertion or dislodgement, eliminating the need for complex disassembly or fixation operations, thus ensuring the safety and stability of the surgical procedure and improving surgical efficiency. Furthermore, the magnetic sliding eliminates the need to touch the front of the sleeve, conforming to aseptic standards and reducing the risk of contamination. The main and secondary lumens of the double-lumen catheter operate independently, and combined with the concentric, unobstructed shape after balloon inflation, a stable, unobstructed surgical space is formed, providing a wider and clearer field of vision. This allows the surgeon to observe the surgical area more comprehensively, facilitating accurate surgical procedures and reducing surgical risks.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-consumable, efficient, and simple neuroendoscopic sleeve, comprising a sleeve body and a double-lumen catheter extending into the sleeve body. The front end of the sleeve body has an arc-shaped cut. The double-lumen catheter includes a main lumen and an annular secondary lumen arranged coaxially. The front end of the annular secondary lumen is connected to an annular balloon via heat compression, and the tail end is connected to an inflation device via a Luer connector. A limiting ring is fixedly connected to the outer wall of the tail end of the double-lumen catheter. A magnetic limiting mechanism is provided between the sleeve body and the limiting ring. The sleeve body is modified from a medical polypropylene syringe. The arc-shaped cut at the front end, that is, the end closest to the patient, can reduce damage to surrounding tissues and lower surgical risks during insertion into brain tissue. The angle of the arc-shaped cut is 30°-40°, and the radius is 2-3mm. The edges of the arc-shaped cut are polished to make it smoother and avoid scratching brain tissue during insertion. The outer surface and inner wall of the sleeve body undergo a special photochemical treatment to reduce friction and minimize damage to brain tissue during insertion. Simultaneously, the surface of the sleeve body is treated with a hydrophilic coating to further improve its smoothness and biocompatibility in vivo. The inner diameter of the sleeve body is slightly larger than the outer diameter of the double-lumen catheter, typically 0.5-1 mm larger, to ensure smooth insertion of the double-lumen catheter while maintaining a certain seal to prevent fluid leakage. Clear graduations with a 1 mm accuracy are provided along the length of the sleeve body's outer surface. These graduations help surgeons accurately determine the insertion depth, improving surgical precision. Furthermore, different colored markings are used at the front and rear ends of the sleeve body, typically green at the front and red at the rear. This color-coding allows surgeons to quickly identify the sleeve's orientation during surgery, preventing misoperation.

[0007] Furthermore, it's important to note that the end of the sleeve body has a ring-shaped protrusion that extends above the sleeve itself. This protrusion engages with the limiting ring to prevent excessive insertion of the double-lumen catheter. Additionally, the end features a non-slip texture to facilitate gripping of the sleeve body during the procedure.

[0008] Here, the Luer connector used to connect the inflation device and the annular secondary cavity is a conventional existing technology and therefore will not be described in detail.

[0009] Preferably, the magnetic limiting mechanism includes a permanent magnet ring fixed to the sleeve body and a magnetic absorbing plate fixed to the limiting ring near the sleeve body. The outer diameter of the permanent magnet ring is designed to be slightly smaller than the outer diameter of the annular protrusion at the tail end of the sleeve body. In other words, its size design ensures that the permanent magnet ring and the sleeve body have sufficient contact area for secure fixation to the sleeve body, while also providing a suitable magnetic field strength within a limited space.

[0010] Furthermore, the inner diameter of the limiting ring matches the outer diameter of the double-lumen conduit, and its interior is designed with a transition hole that conforms to the outer diameter of the double-lumen conduit. This ensures a tight connection between the limiting ring and the double-lumen conduit while facilitating installation and disassembly. The limiting ring and the double-lumen conduit are connected using a thermoforming method.

[0011] Specifically, after the double-lumen catheter is inserted into the sleeve body, the magnetic locator on the limiting ring approaches the permanent magnet ring on the sleeve body. Due to the magnetic attraction between the magnetic locator and the permanent magnet ring, they attract each other, thus fixing the double-lumen catheter in a specific position within the sleeve body. When the doctor needs to adjust the position of the double-lumen catheter, only an external force slightly greater than the magnetic attraction force needs to be applied to overcome the attraction between the magnetic locator and the permanent magnet ring, allowing the double-lumen catheter to be easily moved within the sleeve body. After adjusting to the appropriate position, releasing the external force causes the magnetic locator and the permanent magnet ring to attract again, fixing the double-lumen catheter in the new position.

[0012] Preferably, the cross-section of the double-lumen catheter is a concentric circle structure, with the main lumen located at the geometric center and the annular secondary lumen surrounding the main lumen. The main lumen is primarily used for the insertion and advancement of surgical instruments, while the annular secondary lumen, surrounding the main lumen, is mainly used for inflating and expanding the annular balloon. Its inner diameter closely matches the outer diameter of the main lumen, and the main lumen and the annular secondary lumen are seamlessly connected.

[0013] Furthermore, the front end of the annular secondary cavity is tightly connected to the annular airbag through a hot-pressing process to form a sealed cavity.

[0014] Preferably, the front end of the main lumen of the dual-lumen catheter extends 0.5-1.0 mm beyond the front end of the annular secondary lumen. The inner wall of the annular secondary lumen is decorated with a spiral pattern, and its tail end is closed. This prevents the front end of the annular secondary lumen from obstructing the operating field of view of the main lumen. When inserted into the surgical instrument chamber through the main lumen, the extended portion creates a larger operating space at the front end of the main lumen. The instruments are not interfered with by the annular secondary lumen and are not obstructed by the inflated annular balloon, allowing for more flexible operations such as grasping, cutting, and electrocoagulation. During the surgery, when the annular balloon at the front end of the annular secondary lumen inflates, the spiral pattern on the inner wall will make close contact with the surrounding tissue. The closed tail end ensures that the annular secondary lumen and the annular balloon form a sealed chamber, preventing gas leakage during inflation and allowing the annular balloon to inflate normally and reach the expected pressure and shape.

[0015] Preferably, the anterior end of the main cavity has several lateral drainage holes arranged in a cross-shaped symmetrical pattern. There are four lateral drainage holes arranged in a cross-shaped symmetrical pattern at the anterior end of the cavity, each with a diameter of 0.5-0.8 mm. The depth of the drainage holes is determined based on the wall thickness of the main cavity and actual needs, typically 1-1.5 mm. During surgery, these drainage holes can promptly drain cerebrospinal fluid, blood, or irrigation fluid, maintaining a clear surgical field and creating favorable conditions for surgical procedures.

[0016] Preferably, the annular airbag, after inflation, expands in a anterolateral shape, forming a concentric, unobstructed space with the front opening of the main cavity. In its uninflated state, the inner diameter of the annular airbag is slightly larger than the outer diameter of the main cavity, specifically 0.2-0.3 mm larger. After inflation, the anterolateral expansion of the annular airbag has a specific size range, with a maximum diameter of 8-10 mm, to provide sufficient support area for contact with surrounding tissues. During inflation, the thinner anterolateral portion of the annular airbag expands preferentially under pressure, forming a specific anterolateral expansion shape. Simultaneously, the airbag contains microstructures, such as fine support ribs or meshes, to further guide the expansion direction, ensuring a standard concentric, unobstructed space with the front opening of the main cavity.

[0017] To further explain, the outer surface of the annular airbag 23 needs to be coated with a temperature-sensitive hydrogel layer to form a lubricating film at body temperature, thereby preventing tissue damage when the annular airbag is withdrawn.

[0018] To further explain, the inflation device includes a pressure indicator with an internal elastic diaphragm that deforms with pressure. A pressure indicator window is integrated at the top of the device, containing color-coded markings. The diaphragm diameter is determined based on the internal space and sensitivity requirements of the pressure indicator, typically 10-15mm, ensuring sufficient deformation under pressure to drive the display components within the window. The window's size is designed to provide a sufficient display area without making the inflation device too large and affecting operation. The window surface is treated with an anti-fog coating to prevent condensation in the surgical environment from affecting observation. The color markings are divided into three zones: a green zone represents the ideal pressure range for normal balloon operation; a yellow zone indicates the pressure is approaching a critical value, requiring caution; and a red zone indicates excessive pressure and risk, requiring immediate cessation of inflation and appropriate deflation. The boundaries between each color zone are clearly defined and fixed inside the pressure indicator window using printing or injection molding. When the annular balloon is inflated, gas enters the inflation device, and pressure acts on the elastic diaphragm. As the pressure increases, the elastic diaphragm deforms, with the degree of deformation proportional to the pressure. The deformation of the elastic diaphragm is transmitted to the color display component inside the pressure indicator window via a mechanical transmission structure (such as a lever or linkage). For example, when the pressure is in the green zone, the deformation of the elastic diaphragm ensures that the green display component is fully exposed inside the pressure indicator window; as the pressure rises into the yellow zone, the elastic diaphragm deforms further, causing the yellow display component to gradually cover the green component; if the pressure value enters the red zone, the red display component is fully displayed inside the pressure indicator window, alerting the doctor to abnormal pressure.

[0019] It should be noted that the front end and the tail end here refer to the side of the sleeve that contacts the patient, that is, the side closer to the patient or inside the patient's body is called the front end, while the side away from the patient, that is, the side closer to the operator, is called the tail end.

[0020] (III) Beneficial Effects

[0021] (1) The double-lumen catheter with concentric double-lumen design ensures unobstructed operation channel. At the same time, the magnetic limiting mechanism (permanent magnet ring on the sleeve body + magnetic absorbing plate on the limiting ring) enables rapid positioning, thereby accurately limiting the position of the double-lumen catheter in the sleeve body, ensuring that the double-lumen catheter will not be over-inserted or dislodged. No complicated disassembly or fixing operation is required, which ensures the safety and stability of the surgical operation and improves the efficiency of the operation.

[0022] (2) The main lumen and the annular secondary lumen of the dual-lumen catheter operate independently. Combined with the concentric, unobstructed shape of the inflated annular balloon, they form a stable, unobstructed surgical space, providing a wider and clearer field of vision for surgical operations. This facilitates accurate surgical procedures and reduces surgical risks. At the same time, the pressure indicator (elastic diaphragm + color marking) monitors the balloon pressure in real time, reducing the risk of tissue damage from multiple dimensions. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the present invention;

[0024] Figure 2 This is a cross-sectional view of the internal structure of the double-lumen catheter in this utility model;

[0025] Figure 3 This is a structural diagram of the annular airbag in this utility model;

[0026] Figure 4 This is a structural diagram of the magnetic limiting mechanism in this utility model.

[0027] In the figure: 1-sleeve body, 11-arc-shaped section, 2-double-lumen conduit, 21-main lumen, 211-lateral drainage hole, 22-annular secondary lumen, 23-annular airbag, 24-inflation device, 3-limiting ring, 30-magnetic limiting mechanism, 301-permanent magnet ring, 302-magnetic plate. Detailed Implementation

[0028] The following will refer to the appendix in the embodiments of this utility model. Figure 1 - Appendix Figure 4 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Example 1: As Figure 1 As shown, the first specific embodiment of this utility model provides a low-consumer, effective, and simple neuroendoscopic sleeve, including a sleeve body 1 and a double-lumen catheter 2 extending into the sleeve body 1. The sleeve body 1 has an arc-shaped cut surface 11 at its front end. The double-lumen catheter 2 includes a main lumen 21 and an annular secondary lumen 22 arranged coaxially. The front end of the annular secondary lumen 22 is connected to an annular airbag 23 via heat pressing, and the tail end is connected to an inflation device 24 via a Luer connector. A limiting ring 3 is fixedly connected to the outer wall of the tail end of the double-lumen catheter 2, and a magnetic limiting mechanism 30 is provided between the sleeve body 1 and the limiting ring 3. The arc-shaped cut surface 11 not only reduces the resistance during insertion but also plays a guiding role to a certain extent, making it easier for the sleeve body to enter the target position along the predetermined path. At the same time, this design can disperse the pressure during insertion and reduce local compression on brain tissue.

[0030] The front end of the annular secondary cavity 22 is tightly connected to the annular airbag 23 through a hot-pressing process to form a sealed cavity. The hot-pressing process can ensure the sealing and firmness of the connection, and there will be no air leakage or separation when the annular airbag 23 is inflated by the inflation device 24.

[0031] The magnetic suction limiting mechanism 30 includes a permanent magnet ring 301 fixed to the sleeve body 1 and a magnetic suction plate 302 fixed to the limiting ring 3 near the sleeve body 1. This magnetic suction limiting mechanism 30 has the advantages of simple operation and accurate positioning. Doctors can operate it with one hand and quickly adjust the position of the double-lumen catheter, greatly improving surgical efficiency. It ensures that the attraction force between the magnetic suction plate 302 and the permanent magnet ring 301 is stable and reliable, effectively preventing the double-lumen catheter from shifting during the operation and ensuring the safety and accuracy of the operation.

[0032] The cross-section of the double-lumen catheter 2 is a concentric circle structure, with the main lumen 21 located at the geometric center and the annular secondary lumen 22 being an annular channel surrounding the main lumen 21.

[0033] The front end of the main lumen 21 of the double-lumen catheter 2 extends 0.5-1.0 mm beyond the front end of the annular secondary lumen 22. The inner wall of the annular secondary lumen 22 is provided with a spiral pattern, and its tail end is closed. After the annular balloon 23 is inflated, the spiral pattern inside the annular secondary lumen 22 can make close contact with the surrounding tissue, increase friction, and play an anchoring role to prevent the double-lumen catheter 2 from shifting during the operation. Furthermore, the tail end of the annular secondary lumen 22 is closed and connected to the inflation device 24 through a Luer connector. The Luer connector conforms to international standards, is convenient and reliable to connect, and can ensure the smooth inflation process.

[0034] The spiral pattern ensures sufficient friction and guidance without compromising the strength of the annular secondary cavity 22 or the flow of gas and liquid due to excessive depth or density of the pattern. The sealed end prevents external contaminants such as dust and bacteria from entering the annular secondary cavity 22, ensuring its cleanliness and hygiene. This is particularly beneficial in surgical environments, preventing complications such as infection caused by contaminants and improving surgical safety.

[0035] The front end of the main cavity 21 is provided with several lateral drainage holes 211, arranged in a cross-shaped symmetrical pattern. The lateral drainage holes 211 communicate with the interior of the main cavity 21, forming a complete drainage channel. The main cavity 21 provides a transport path for the drainage fluid, transporting the fluid drawn in from the lateral drainage holes 211 to an external drainage device. The two work together to achieve effective fluid drainage. Furthermore, while the lateral drainage holes 211 primarily function as drainage points, they also have a certain cooperative relationship with the annular secondary cavity 22 and the annular airbag 23. After the annular airbag 23 inflates, it can fix the position of the double-lumen catheter 2, ensuring that the lateral drainage holes 211 can be accurately aligned with the area requiring drainage. Simultaneously, the presence of the annular secondary cavity 22 provides structural support for the double-lumen catheter 2, enabling the main cavity 21 and the lateral drainage holes 211 to function stably.

[0036] After inflation, the annular airbag 23 expands outwards, forming a concentric, unobstructed space with the front opening of the main cavity 21. This concentric, unobstructed space facilitates instrument operation at the front end of the main cavity 21. Simultaneously, the presence of the main cavity 21 provides a reference for the positioning of the annular airbag 23, ensuring that the airbag always inflates around the front end of the main cavity 21, maintaining a stable concentric relationship. The annular secondary cavity 22 is responsible for delivering the gas supplied by the inflation device 24 to the annular airbag 23, ensuring smooth inflation. During inflation, the spiral texture on the inner wall of the annular secondary cavity 22 guides and stabilizes the gas flow, ensuring uniform inflation of the airbag. Furthermore, the structural strength of the annular secondary cavity 22 provides support for the annular airbag 23, preventing excessive deformation or rupture due to excessive pressure during inflation.

[0037] Furthermore, the inflation device 24 is tightly connected to the tail end of the annular secondary cavity 22 via a Luer connector, delivering gas to the annular balloon 23 for inflation. Simultaneously, a pressure indicator monitors the pressure within the balloon in real time, providing feedback to the surgeon so that the inflation volume can be adjusted according to surgical needs, ensuring the annular balloon 23 provides optimal support and positioning. Specifically, at the start of surgery, the surgeon slowly inflates the annular balloon 23 using the inflation device 24, observing the color of the pressure indicator window. Inflation is stopped when the pressure reaches the green zone, at which point the annular balloon 23 is in a suitable working state. Additionally, the inflation device 24, together with the double-lumen catheter 2 and the sleeve body 1, constitute a complete neuroendoscopic sleeve system. Accurate monitoring by the pressure indicator ensures that the double-lumen catheter 2 operates under stable pressure, preventing displacement of the double-lumen catheter 2 or damage to surrounding tissues due to pressure issues with the annular balloon 23. At the same time, the sleeve body 1 provides external support and guidance for the entire system, keeping the inflation device 24 and other components stable during surgical procedures, collaboratively providing safe and convenient operating conditions for neuroendoscopic surgery.

[0038] Working principle: During use, the arc-shaped cut surface 11 at the front end of the sleeve body 1 is slid against the surface of the brain tissue to reduce insertion resistance. When the double-lumen catheter 2 is advanced to the target depth, the limiting ring 3 contacts the sleeve body 1 to form a physical barrier. Subsequently, the permanent magnet ring 301 on the sleeve body and the magnetic suction plate 302 on the limiting ring 3 generate an attraction force to achieve temporary position locking. Inflation device 24 inflates the annular airbag 23 and observes the pressure change. During inflation, the spiral texture of the inner wall of the annular secondary cavity 22 allows the gas to be smoothly delivered to the annular airbag 23 in a laminar flow. After inflation, the annular airbag 23 expands preferentially in the anterolateral direction to form a conical space. Then, the neuroendoscopy and microsurgical instruments are inserted through the main cavity 21. The instruments will reach the front end of the main cavity 21 and extend beyond the front end of the secondary cavity 22 to ensure the endoscopic field of view and the opening of the main cavity. The lateral drainage hole 211 generates a vortex effect when suctioned by negative pressure, improving the efficiency of hematoma removal.

[0039] Example 2: After the surgery, it needs to be removed. At this time, first turn off the inflation device 24. When the inflation device 24 is turned off, the negative pressure of the main cavity 21 generates a siphon effect through the lateral drainage hole, so that the airbag collapses completely within 3 seconds. Then, pull the limiting ring 3 backward, so that the magnetic suction piece 302 on the limiting ring 3 separates from the permanent magnet ring 301 on the sleeve body 1. Pull the double-lumen catheter 2 out of the sleeve body and press the Luer connector unlock button. The double-lumen catheter 2 can be separated from the inflation device 24 with one hand. Then, take out the sleeve body 1.

Claims

1. A low-consumable, practical, and simple neuroendoscopic sleeve, comprising a sleeve body (1) and a double-lumen catheter (2) extending into the sleeve body (1), characterized in that, The sleeve body (1) has an arc-shaped cut surface (11) at the front end. The double-lumen conduit (2) includes a main lumen (21) and an annular secondary lumen (22) arranged coaxially. The front end of the annular secondary lumen (22) is connected to an annular airbag (23) by heat pressing, and the tail end is connected to an inflation device (24) by a Luer connector. The outer wall of the tail end of the double-lumen conduit (2) is fixedly connected to a limiting ring (3). A magnetic limiting mechanism (30) is provided between the sleeve body (1) and the limiting ring (3).

2. The low-consumable, practical, and simple neuroendoscopic sleeve according to claim 1, characterized in that, The magnetic limiting mechanism (30) includes a permanent magnet ring (301) fixed on the sleeve body (1) and a magnetic absorbing piece (302) fixed on the limiting ring (3) near the sleeve body (1).

3. The low-consumable, practical, and simple neuroendoscopic sleeve according to claim 1, characterized in that, The cross-section of the double-lumen catheter (2) is a concentric circle structure, with the main lumen (21) located at the geometric center and the annular secondary lumen (22) being an annular channel surrounding the main lumen (21).

4. The low-consumable, practical, and simple neuroendoscopic sleeve according to claim 3, characterized in that, The front end of the main lumen (21) of the double-lumen catheter (2) extends 0.5-1.0 mm beyond the front end of the annular secondary lumen (22). The inner wall of the annular secondary lumen (22) is provided with a spiral pattern, and its tail end is closed.

5. The low-consumable, practical, and simple neuroendoscopic sleeve according to claim 4, characterized in that, The front end of the main cavity (21) is provided with several lateral drainage holes (211), which are distributed in a cross-shaped symmetrical manner.

6. The low-consumable, practical, and simple neuroendoscopic sleeve according to claim 1, characterized in that, After inflation, the annular airbag (23) expands outward and forms a concentric, unobstructed space with the front opening of the main cavity (21).

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