Intranervous mirror-mother sleeve assembly for deep ventricle and use method of intranervous mirror-mother sleeve assembly

Abstract

The invention relates to an intranervous mirror mother sleeve assembly for deep ventricle, which comprises a first-stage sleeve, a first-stage sleeve core, a second-stage sleeve and a second-stage sleeve core, the first-stage sleeve and the second-stage sleeve can be nested with each other and used for constructing a first-stage channel, and the second-stage sleeve and the second-stage sleeve core can be nested with each other and inserted into the first-stage sleeve and used for constructing a second-stage channel. Through the orderly cooperation of all the parts in the assembly, the replacement between a brain tissue superficial part operation first-stage cannula with a large diameter and a short cannula length and a brain tissue deep part operation second-stage cannula with a small diameter and a long cannula length can be completed through a coaxial exchange technology; the secondary sub-cylinder which is thinner, higher in activity, smaller in brain injury and more accurate in positioning is used to enter deep tissues or ventricles, so that protection of deep brain function nuclei and arteriovenous blood vessels with a plurality of thin ventricle walls is facilitated, surgical side injuries are reduced, surgical risks are reduced, and neurological function prognosis of patients is improved.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and in particular relates to a neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles and a method for using the same. Background Art

[0002] The brain ventricle is the deepest cavity structure in the brain tissue, and is the main channel and storage space for intracranial cerebrospinal fluid circulation. The surrounding ventricle wall structures include important nerve structures such as the thalamus, hypothalamus, and corpus callosum. There are also cerebrospinal fluid and blood circulation lumens such as choroid plexus and intraventricular veins inside. Lesions here, such as bleeding and tumors, can lead to serious conditions such as acute ventricular dilation, ventricular cast, hydrocephalus after cerebrospinal fluid circulation disorder, and brain hernia, and can endanger life at any time when severe.

[0003] Traditional craniotomy has a large incision, causes great tissue damage to the tissues such as the scalp, skull, and dura mater, and has a slow recovery later; neuroendoscopic surgery has a small incision, causes little tissue damage to the above surgical channels, and its main advantage is to maximize the protection of brain tissue and maximize the rescue and improvement of the brain tissue function of the patient. For the removal of hematomas and resection of lesions in the deep brain ventricles, the advantages of neuroendoscopy are even more obvious, which can be reflected in the advantages of minimally invasive, accurate positioning, little brain tissue damage, little bleeding of important blood vessels, and maximum protection of nerve function. However, the current endoscopic sleeve mode used for deep intracerebral operation and surgical treatment by neuroendoscopy is single, and most of them are surgical instruments in the cortex and shallow brain tissues under the cortex. There are many disadvantages such as thick diameter, short length, obvious extrusion of deep brain tissues, large deep damage, unclear embedding depth, inflexible movement, and limited visual and operable angles. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles and a method for using the same.

[0005] The technical solution adopted by the present invention is: a neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles, including,

[0006] A primary sleeve, which is a conical cylinder with both ends open;

[0007] A primary core, which is a conical cylinder with both ends open and can be embedded in the primary sleeve;

[0008] A secondary sleeve, which is a cylindrical cylinder or a conical cylinder with both ends open and can be inserted into the primary sleeve;

[0009] A secondary core, which is a cylindrical cylinder or a conical cylinder with both ends open and can be embedded in the secondary sleeve.

[0010] Preferably, the first-stage sleeve core fits the inner wall of the first-stage sleeve, and the lower end of the first-stage sleeve core is not shorter than the lower edge of the first-stage sleeve.

[0011] Preferably, the upper end of the first-stage sleeve is provided with a first-stage sleeve fixing arm, and the upper end of the first-stage sleeve core is provided with a first-stage sleeve core fixing arm, and the positions of the first-stage sleeve fixing arm and the first-stage sleeve core fixing arm match;

[0012] Preferably, the first-stage sleeve fixing arm is provided with a first positioning protrusion, and the first-stage sleeve core fixing arm is provided with a first positioning groove, and the first positioning protrusion can be engaged with the first positioning groove.

[0013] Preferably, a pair of first-stage sleeve fixing arms are symmetrically provided upward at the upper end of the first-stage sleeve, and the upper end of the first-stage sleeve core is provided with a first-stage sleeve core fixing ring, and the first-stage sleeve fixing arm can penetrate into the first-stage sleeve core fixing ring.

[0014] Preferably, the second-stage sleeve core can fit the inner wall of the second-stage sleeve, and the lower end of the second-stage sleeve core is not shorter than the lower edge of the second-stage sleeve.

[0015] Preferably, the upper end of the second-stage sleeve is provided with a second-stage sleeve fixing arm, and the second-stage sleeve fixing arm is parallel to the axis of the second-stage sleeve.

[0016] Preferably, the upper end of the second-stage sleeve is provided with a second-stage sleeve fixing arm, and the upper end of the second-stage sleeve core is provided with a second-stage sleeve core fixing arm, and the positions of the second-stage sleeve fixing arm and the second-stage sleeve core fixing arm match;

[0017] Preferably, the second-stage sleeve fixing arm is provided with a second positioning protrusion, and the second-stage sleeve core fixing arm is provided with a second positioning groove, and the second positioning protrusion can be engaged with the second positioning groove.

[0018] Preferably, it further includes a suction device, and the suction tube of the suction device is arc-shaped; the suction device can penetrate into the first-stage sleeve or the second-stage sleeve;

[0019] Preferably, scales are provided on the first-stage sleeve, the second-stage sleeve and the suction tube;

[0020] Preferably, when the second-stage sleeve is a cylindrical tube, the inner diameter of the lower edge of the first-stage sleeve is not less than the outer diameter of the second-stage sleeve; when the second-stage sleeve is a conical tube, after the second-stage sleeve is inserted into the first-stage sleeve, the gap between the bottom edge of the first-stage sleeve and the outer surface of the second-stage sleeve is not less than 1 mm.

[0021] A method for using a neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles, characterized in that: combining the first-stage sleeve and the first-stage sleeve core, placing them at a set position, and removing the first-stage sleeve core.

[0022] Preferably, combine the secondary sleeve and the secondary sleeve core and insert them into the primary sleeve core;

[0023] Remove the primary sleeve and the secondary sleeve core;

[0024] Or, combine the secondary sleeve and the secondary sleeve core and insert them into the primary sleeve core;

[0025] Remove the secondary sleeve core.

[0026] The advantages and positive effects of the present invention are as follows: provide a new type of endoscopic-assisted instrument for deep brain ventricle surgery. The neurosurgical mother-daughter sleeve assembly can establish a channel with an adjustable diameter, with accurate embedding depth, high mobility, and sufficient and comprehensive visual and operable angles, avoiding brain tissue friction and brain tissue cutting damage caused by repeated insertion of the sleeve. At the same time, when used for deep brain tissue surgery, the damage is small and the degree of extrusion is light. Description of the Drawings

[0027] Figure 1 Schematic structural diagram of the neurosurgical mother-daughter sleeve assembly according to an embodiment of the present invention; Figure 2 Schematic diagram of the combination of each component in the neurosurgical mother-daughter sleeve assembly according to an embodiment of the present invention; Figure 3 Schematic top view structural diagram of the combination of each component in the neurosurgical mother-daughter sleeve assembly according to an embodiment of the present invention; Figure 4 Schematic diagram of the usage method of the primary sleeve and the primary sleeve core according to an embodiment of the present invention; Figure 5 Schematic diagram of the usage method of the secondary sleeve and the secondary sleeve core according to an embodiment of the present invention; Figure 6 Schematic structural diagram of the primary sleeve and the primary sleeve core according to an embodiment of the present invention; Figure 7 Schematic structural diagram of the secondary sleeve and the secondary sleeve core according to an embodiment of the present invention; Figure 8 Schematic diagram of the combination of each component according to an embodiment of the present invention; Figure 9 Schematic structural diagram of the aspirator according to an embodiment of the present invention; Figure 10 Schematic diagram of the combination of each component according to an embodiment of the present invention; In the figure: 1. Primary sleeve, 11. Primary sleeve fixing arm, 12. First positioning protrusion, 13. Suture fixing hole, 2. Primary sleeve core, 21. Primary sleeve core fixing arm, 22. First positioning groove, 23. Primary sleeve core fixing ring, 3. Secondary sleeve, 31. Secondary sleeve fixing arm, 4. Secondary sleeve core. Detailed implementation manners

[0028] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] The present invention relates to a neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles, as Figure 1 shown, which includes a primary sleeve, a primary core, a secondary sleeve, and a secondary core.

[0030] The primary sleeve is a conical cylinder with open ends and wider at the top and narrower at the bottom, and can be used to establish a superficial channel. The primary core is also a conical cylinder with open ends and wider at the top and narrower at the bottom, but only has a circular small hole at the bottom. The shape and size of the upper end opening are the same as those of the primary sleeve, and it can be inserted into the primary sleeve. When the primary core is nested with the primary sleeve, the primary core can fit against the inner wall of the primary sleeve, and the bottom of the primary core slightly protrudes from the bottom of the primary sleeve, as Figure 2 shown. The lower end of the primary core is not shorter than the lower edge of the primary sleeve, and the part of the primary core that extends beyond the bottom of the primary sleeve converges inward to form a spherical surface, and a decompression drainage hole is provided at the center of the spherical surface. During use, the primary sleeve and the primary core are nested and combined, and inserted into the brain surface according to the set route. The bottom of the primary core is in a round spherical shape, squeezing the brain tissue to both sides, forming a channel for accommodating the primary sleeve. Cerebrospinal fluid, necrotic brain tissue, hematoma, etc. can be discharged into the core through the drainage hole at the center of the bottom of the primary core, relieving the intracranial pressure during the insertion of the sleeve.

[0031] For the convenience of operation and to improve the tightness of the combination of the primary sleeve and the primary core, in some embodiments of the present invention, fixing arms are respectively provided at the upper edge of the primary sleeve and the primary core, and the direction of the fixing arms is perpendicular to the axis of the primary sleeve; a primary sleeve fixing arm is provided at the upper end of the primary sleeve, and a primary core fixing arm is provided at the upper end of the primary core. The positions of the primary sleeve fixing arm and the primary core fixing arm match and can overlap. Among them, there is a difference in length between the primary sleeve fixing arm and the primary core fixing arm, as Figure 3 shown, which is convenient to distinguish the primary sleeve fixing arm and the primary core fixing arm by length during operation. Further, in order to strengthen the cooperation degree of the primary sleeve and the primary core during use, a first positioning protrusion is provided on the primary sleeve fixing arm, and a first positioning groove is provided on the primary core fixing arm. The first positioning protrusion can be engaged with the first positioning groove. When the primary sleeve and the primary core are nested and used in combination, the cooperation of the first positioning protrusion and the first positioning groove on the fixing arm further avoids the displacement of the two in the circumferential direction. The first positioning protrusion and the first positioning groove can be provided on the side surfaces of the primary sleeve fixing arm and the primary core fixing arm, and / or simultaneously provided on the surfaces of the primary sleeve fixing arm and the primary core fixing arm that are in contact with each other.

[0032] In other embodiments of the present invention, as Figure 6As shown, on both sides of the upper end of the first-stage sleeve, first-stage sleeve fixing arms are symmetrically arranged. The directions of the first-stage sleeve fixing arms are parallel to the axis of the first-stage sleeve and are in a vertically upward state. On both sides of the upper-end edge of the first-stage sleeve core, first-stage sleeve core fixing rings are arranged. The positions and shapes of the first-stage sleeve fixing arms and the first-stage sleeve core fixing rings match. The first-stage sleeve fixing arms can be sleeved into the first-stage sleeve core fixing rings. After the two are overlapped and nested, the first-stage sleeve core fixing rings are located at the bottoms of the first-stage sleeve fixing arms. The center of the first-stage sleeve core fixing ring can be rectangular, circular, oval or other shapes, and the first-stage sleeve fixing arms can be inserted into the first-stage sleeve core fixing rings. Preferably, a rectangular first-stage sleeve core fixing ring is used, and a first-stage sleeve fixing arm with a rectangular projection shape is adopted. The two shapes match and can be closely attached, and the consistency of the first-stage sleeve and the first-stage sleeve core is strengthened through the close cooperation of the first-stage sleeve core fixing ring and the first-stage sleeve fixing arms.

[0033] For easy holding, an arc-shaped concave surface is provided on the outer side of the first-stage sleeve fixing arm. On the one hand, it is convenient for accurate grasping during use, and on the other hand, it avoids affecting the insertion and removal processes of the first-stage sleeve core. The edge of the first-stage sleeve core fixing ring extends beyond the bottom surface range of the first-stage sleeve fixing arm, which is convenient for accurately finding the first-stage sleeve core fixing ring when removing the first-stage sleeve core. One or more circular suture fixing holes are also provided at the upper-end edge of the first-stage sleeve. During use, they can be used to suture and fix the first-stage sleeve to maintain the stability of the first-stage sleeve. Preferably, four suture fixing holes are provided, which are respectively arranged on both sides of the bottom of the first-stage sleeve fixing arm.

[0034] The second-stage sleeve is a columnar cylinder or a conical cylinder with both ends open, which can be placed in the first-stage sleeve. The length of the second-stage sleeve is greater than that of the first-stage sleeve and is used to establish a surgical channel deep in the brain. During use, the outer diameter of the columnar second-stage sleeve is not greater than the inner diameter of the bottom of the first-stage sleeve, and the second-stage sleeve can be placed within the range of the first-stage sleeve and pass through the bottom of the first-stage sleeve. Or, the bottom outer diameter of the conical second-stage sleeve is smaller than the inner diameter of the bottom of the first-stage sleeve. When the second-stage sleeve is placed in the first-stage sleeve and the tops are fitted, a gap of not less than 1 mm is maintained between the bottom edge of the first-stage sleeve and the outer wall of the second-stage sleeve, so that the second-stage sleeve can have a certain range of adjustment angles in the first-stage sleeve.

[0035] A second-stage sleeve core is also provided. The second-stage sleeve core is a columnar cylinder or a conical cylinder identical to the second-stage sleeve and can be embedded in the second-stage sleeve. The lower end of the second-stage sleeve core is not shorter than the lower edge of the second-stage sleeve. The part of the second-stage sleeve core extending beyond the bottom of the second-stage sleeve converges inward to form a spherical surface, and a decompression drainage hole is provided at the center of the spherical surface, as Figure 2 shown. During use, the second-stage sleeve and the second-stage sleeve core are nested and combined and inserted into the range of the first-stage sleeve according to the set route. The bottom of the second-stage sleeve core is in a round spherical shape, and the brain tissue is separated to both sides along the brain tissue gap to form a central channel for accommodating the second-stage sleeve.

[0036] In some embodiments of the present invention, a secondary sleeve fixing arm is provided at the upper edge of the secondary sleeve. The secondary sleeve fixing arm is parallel to the axis of the secondary sleeve to avoid any interference from the secondary sleeve fixing arm during the removal of the primary sleeve from the outside of the secondary sleeve. At the same time, the secondary sleeve fixing arm can also be used to fix the device or hold the secondary sleeve in place to maintain the stability of the channel during the operation.

[0037] In some other embodiments of the present invention, as Figure 7 shown, a secondary sleeve fixing arm is provided at the upper edge of the secondary sleeve. The secondary sleeve fixing arm is perpendicular to the axis of the secondary sleeve. A secondary sleeve core fixing arm is provided at the upper edge of the secondary sleeve core. The secondary sleeve fixing arm and the secondary sleeve core fixing arm are in corresponding positions and can overlap. Moreover, the lengths of the secondary sleeve fixing arm and the secondary sleeve core fixing arm are different for easy distinction. The secondary sleeve fixing arm and the secondary sleeve core fixing arm can be used to fix the device or hold the secondary sleeve in place to maintain the stability of the channel during the operation. A second fixing protrusion is provided on the secondary sleeve fixing arm, and a second positioning groove is provided on the secondary sleeve core fixing arm. The second positioning protrusion and the second positioning groove are in corresponding positions and can be mutually engaged. When the secondary sleeve core is placed in the secondary sleeve, the relative positions of the two can be kept stable through the limiting action of the second positioning protrusion and the second positioning groove, avoiding relative displacement in the axial direction or circumferential direction. The second positioning protrusion and the second positioning groove can be provided on the side surfaces of the secondary sleeve fixing arm and the secondary sleeve core fixing arm, and / or simultaneously provided on the mutually contacting surfaces of the secondary sleeve fixing arm and the secondary sleeve core fixing arm.

[0038] The primary sleeve and the primary sleeve core are used to establish a channel in the superficial part of the brain, and the secondary sleeve and the secondary sleeve core are used to establish a channel deeper inside. According to different combinations of the primary sleeve and the secondary sleeve, a surgical plan of removing or maintaining the primary sleeve can be selected.

[0039] The secondary sleeve and the secondary sleeve core are preferably conical cylinders. The inclined surface structure of the conical cylinder is more conducive to the adjustment of the primary channel and the secondary channel, increasing the applicable range of the neuroendoscope mother and son sleeves. When using the plan of removing the primary sleeve after establishing the secondary channel, the inner diameter of the bottom end of the primary sleeve is set to be larger than the outer diameter of the top end of the secondary sleeve, so that the primary sleeve can be removed from the outside of the secondary sleeve without obstruction.

[0040] When using the plan of removing the primary sleeve after establishing the secondary channel, the fixing arms of the secondary sleeve and the secondary sleeve core use fixing arms parallel to the axis. As Figure 4 shown, first, the primary sleeve core and the primary sleeve are nested to avoid relative displacement during the operation. After the combination of the primary sleeve core and the primary sleeve is placed at the set position according to the set route, the primary sleeve core is removed from above, and a primary channel is formed at the position where the primary sleeve is located; as Figure 5As shown, the secondary core sleeve and the secondary casing are nested and inserted into the primary casing. The primary casing is removed from above the secondary casing. The secondary core sleeve and the secondary casing can be moved to an appropriate depth as needed. The secondary core sleeve is removed, and a secondary channel is formed at the position where the secondary casing is located. When using the scheme of directly establishing a secondary channel in the primary channel, such as Figure 7 As shown, when using an intraneural endoscopic mother-daughter sleeve assembly with a secondary casing including a fixed arm perpendicular to the axis, first, the primary core sleeve and the primary casing are nested. After removing the primary core sleeve, the secondary casing and the secondary core sleeve are combined and placed at a set position along a set route. After removing the secondary core sleeve, the primary casing and the secondary casing are combined to form a surgical channel.

[0041] The primary core sleeve and the primary casing, as well as the secondary core sleeve and the secondary casing, are cooperated, and the replacement of the short and thick primary casing and the long and thin secondary casing is completed through a coaxial exchange technique. This intraneural endoscopic mother-daughter sleeve assembly can be applied to brain tissue surgeries at different depths, and can give full play to the advantages of brain protection, reducing vascular damage, flexible turning, and accurate positioning.

[0042] The intraneural endoscopic mother-daughter sleeve assembly for the deep part of the ventricle may further include a suction device. The suction device includes a suction head and a suction tube. The suction head can adopt a common structure in the prior art. The suction tube is connected to the suction head, and the suction function is implemented under the action of the suction head. The suction tube is arc-shaped, and a scale is provided at the end, and the depth of the suction device penetrating into the brain tissue can be accurately measured under the observation of the neuroendoscope, such as Figure 8 As shown; during use, the suction tube is extended from the lower end of the primary casing or the lower end of the secondary casing to suck excess blood. The arc-shaped design enables it to explore a larger range and increases the applicable range of this intraneural endoscopic mother-daughter sleeve assembly.

[0043] In some embodiments of the present invention, the primary casing, the primary core sleeve, the secondary casing, and the secondary core sleeve are all made of transparent resin material. Most of the existing sleeves are made of plastic or metal materials. The metal material is hard and opaque, making it difficult to observe and protect the brain tissue, and it needs to be repeatedly disinfected for use; while the plastic material has a lower cost, but has poor flexibility, and at the same time, there is a large friction during the combination and replacement of the sleeve and the core sleeve, which poses risks to the stability and fixed position of the sleeve in the brain tissue, and may cause the sleeve to shift, the brain tissue to be pulled sideways, and bleeding in the channel tissue. Using transparent resin material can not only observe the brain tissue inside and outside the tube in real time and adjust the depth, position, etc. accordingly, but also has the flexibility of resin, small friction, keeps the position of the tube body stable, reduces the surgical risk, and has a protective effect on the brain tissue.

[0044] Furthermore, the first-stage sleeve and the second-stage sleeve are provided with scales, preferably four-direction scales. The transparent material makes it more convenient to observe the scale positions, and the four-direction setting enables the positioning depth and position to be understood at any time. The first-stage sleeve and the second-stage sleeve are marked with scales throughout four positions on the tube walls. There is a set of scale rulers every 90°, so there is no need to rotate the sleeve to find the scale lines. It is very convenient to observe the surrounding lesions and bleeding of the sleeve from different directions and angles after the sleeve enters the brain tissue, which is convenient for making marks and for different members during the operation to describe the lesion positions to each other and communicate the intraoperative situation, providing a convenient and accurate "navigation mark" for the cooperation between surgeons.

[0045] The use method of the neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles is flexible and changeable. For example, when performing a superficial operation, a first-stage sleeve with a larger diameter can be used to quickly and rapidly open the tissue channel and, through a relatively open space, complete the resection of superficial lesions and hematomas to the greatest extent. If further penetration into the deep brain tissue or brain ventricle is required, the first-stage sleeve is upgraded to a second-stage sleeve with a smaller diameter through coaxial exchange technology. The second-stage sleeve, which is more slender, causes less brain damage and has more accurate positioning, is used to enter the deep tissue or ventricle, which is beneficial to the protection of deep brain functional nuclei and numerous arteriovenous blood vessels in the ventricle wall, reduces surgical secondary injuries, protects nerve function, and strives for a better surgical prognosis. At the same time, during deep ventricle operations, it is necessary to continuously change the observation angle to remove hematomas from all directions in the three-dimensional space of the ventricle. The relatively slender second-stage sleeve can more flexibly change the observation direction and accurately reach the hematoma site in the ventricle for precise deep and close-range operations, reducing the risk of brain damage and bleeding.

[0046] The coaxial exchange technology can also avoid the repeated insertion of the sleeve. During the repeated insertion process, when the first sleeve is withdrawn, because the brain tissue has elasticity, the sleeve channel quickly shrinks and is filled by the brain tissue. When the second sleeve enters, it is necessary to separate the brain tissue again, which can cause secondary cutting and extrusion injuries to the brain tissue and affect the patient's nerve function after surgery. By using the method of coaxial use of the first-stage sleeve and the second-stage sleeve, it is ensured that no secondary cutting injury to the brain tissue will be caused during the insertion of the second-stage sleeve, which plays an important role in the protection of brain function and the prevention of postoperative brain edema.

[0047] The following will describe the solution of the present invention with reference to the accompanying drawings. Among them, for the experimental methods without specific operation steps described, they are all carried out according to the corresponding product instructions. For the instruments, reagents, and consumables used in the embodiments, if not otherwise specified, they can all be purchased from commercial companies.

[0048] Example 1:

[0049] A neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles, as Figure 1As shown, it includes a first-stage sleeve, a first-stage core sleeve, a second-stage sleeve, and a second-stage core sleeve. The first-stage sleeve, the first-stage core sleeve, the second-stage sleeve, and the second-stage core sleeve are all made of transparent resin material.

[0050] Both the first-stage sleeve and the first-stage core sleeve are conical cylinders with open ends at both ends and can be nested with each other. The lower end of the first-stage core sleeve extends out of the bottom end of the first-stage sleeve, and the extended part is spherical. The inner diameter of the upper end of the first-stage sleeve is 26 mm, the inner diameter of the lower end is 12.9 mm, and the length is 75 mm. The upper end of the first-stage sleeve is provided with a first-stage sleeve fixing arm. The direction of the first-stage sleeve fixing arm is perpendicular to the axis of the first-stage sleeve. There is a first positioning protrusion on the first-stage sleeve fixing arm; the upper end of the first-stage core sleeve is provided with a first-stage core sleeve fixing arm. Similarly, the direction of the first-stage core sleeve fixing arm is perpendicular to the axis of the first-stage core sleeve and can be nested with the first-stage sleeve fixing arm. The first-stage core sleeve fixing arm is nested with the first-stage sleeve fixing arm; there is a first positioning groove on the first-stage core sleeve fixing arm. After the first-stage sleeve and the first-stage core sleeve are nested and fitted, the first positioning protrusion and the first positioning groove are nested with each other to ensure the relative fixation of the first-stage sleeve and the first-stage core sleeve in the circumferential direction. Four groups of scales are evenly arranged on the inner wall of the first-stage sleeve and can be used to indicate the insertion depth of the first-stage sleeve.

[0051] Both the second-stage sleeve and the second-stage core sleeve are columnar cylinders with open ends at both ends and can be nested with each other. The lower end of the second-stage core sleeve extends out of the bottom of the second-stage sleeve, and the extended part is spherical. The inner diameter of the second-stage sleeve is 9.8 mm, and the length is 105 mm. A limiting platform protrudes outward from the upper end of the second-stage core sleeve. As Figure 3 shown, when the second-stage core sleeve is nested with the second-stage sleeve, the upper end of the second-stage core sleeve is prevented from sliding out of the second-stage sleeve through the limiting platform, so that the second-stage core sleeve can be higher than the second-stage sleeve and can only move from the upper end of the second-stage sleeve. A second-stage sleeve fixing arm is provided at the edge of the upper end of the second-stage sleeve. The second-stage sleeve fixing arm is connected to the side edge of the top edge of the second-stage sleeve to avoid affecting the function of the limiting platform; the direction of the second-stage sleeve fixing arm is upward and parallel to the axis of the second-stage sleeve. Four groups of scales are evenly arranged on the inner wall of the second-stage sleeve and can be used to indicate the insertion depth of the second-stage sleeve.

[0052] The first-stage sleeve and the first-stage core sleeve are used in the initial stage of the operation, and the second-stage sleeve and the second-stage core sleeve are used in the deep operation stage. When this neurosurgical nested sleeve assembly is used in brain surgery, the following steps are included:

[0053] Step 1: Combine and fix the first-stage sleeve and the first-stage core sleeve, and gradually and slowly embed the combination into the brain tissue and reach the lesion location;

[0054] Step 2: Fix the first-stage sleeve and withdraw the first-stage core sleeve to form a first-stage channel for performing surgery on the superficial part. Insert the neuroendoscope, aspirator, and bipolar coagulator deep into the bottom of the sleeve, and start the hematoma or lesion resection surgery;

[0055] Step 3: After completing the superficial surgery, start the deep lesion surgery. Combine and fix the secondary cannula and the secondary cannula core; gradually embed them to the bottom of the primary cannula, and use a sleeve with a smaller diameter to expand the space in the deeper brain tissue;

[0056] Step 4: Longitudinally withdraw the primary cannula from the bottom upwards, and keep the position of the secondary cannula-core combination unchanged during the operation;

[0057] Step 5: Advance the secondary combination device deep into the brain tissue to the interior of the deep hematoma or ventricle, fix the secondary cannula and withdraw the secondary cannula core; insert the neuroendoscope, aspirator and bipolar coagulator deep to the bottom of the secondary cannula, and start the resection surgery for deep brain tissue or intraventricular lesions and hematoma lesions;

[0058] Step 6: Slowly withdraw the secondary cannula gradually after the operation, and pay attention to hemostasis during the withdrawal process.

[0059] Example 2:

[0060] A neuroendoscope mother-daughter sleeve assembly for the deep part of the ventricle, comprising a primary cannula, a primary cannula core, a secondary cannula and a secondary cannula core. The primary cannula, the primary cannula core, the secondary cannula and the secondary cannula core are all made of transparent resin material.

[0061] Both the primary cannula and the primary cannula core are in the shape of a frustum with both ends open and can be nested with each other. The lower end of the primary cannula core extends out of the bottom end of the primary cannula, and the extended part is spherical. The inner diameter of the upper end of the primary cannula is 26 mm, the inner diameter of the lower end is 12.9 mm, and the length is 75 mm. A pair of symmetric primary cannula fixing arms are provided upwards at the upper end of the primary cannula, and the directions of the primary cannula fixing arms are parallel to the axis of the primary cannula; the projected shape of the primary cannula fixing arms is rectangular, and there are arc-shaped depressions on the outer side surface; during use, the symmetric concave surfaces can be grasped, so as to realize the grasping and fixing of the primary cannula.

[0062] The upper end of the primary cannula core is provided with a primary cannula core fixing ring, and there are two rectangular hole structures in the primary cannula core fixing ring, and the positions are matched with the primary cannula fixing arms, and the primary cannula fixing arms can pass through the primary cannula core fixing holes. After the primary cannula and the primary cannula core are nested with each other, the primary cannula core fixing holes are attached to the bottom of the primary cannula fixing arms. Four groups of scales are evenly arranged on the inner wall of the primary cannula, which can be used to indicate the insertion depth of the primary cannula. Four suture fixing holes are evenly arranged at the upper end edge of the primary cannula.

[0063] Both the secondary sleeve and the secondary core are conical cylinders with open ends at both ends and can be fitted into each other. The lower end of the secondary core extends out of the bottom of the secondary sleeve, and the extended part is spherical. The maximum diameter of the secondary sleeve is smaller than that of the primary sleeve, and the length of the secondary sleeve is longer than that of the primary sleeve. After the secondary sleeve is fully inserted into the primary sleeve, there is a 1 mm gap between the bottom edge of the primary sleeve and the outer wall of the secondary sleeve. The inner diameter of the upper end of the secondary sleeve is 24 mm, the inner diameter of the lower end is 9.8 mm, and the length is 105 mm.

[0064] At the upper edge of the secondary sleeve, there is a secondary sleeve fixing arm perpendicular to the axis of the secondary sleeve. At the upper edge of the secondary core, there is a secondary core fixing arm. The secondary sleeve fixing arm and the secondary core fixing arm are in corresponding positions and can coincide, and their lengths are different. On the secondary sleeve fixing arm, there is a second fixing protrusion, and on the secondary core fixing arm, there is a second positioning groove. The second positioning protrusion and the second positioning groove are in corresponding positions and can be fitted into each other. When the secondary core is placed in the secondary sleeve, the relative positions of the two can be kept stable through the limiting effect of the second positioning protrusion and the second positioning groove, avoiding relative displacement in the axial direction or circumferential direction. Four groups of scales are evenly arranged on the inner wall of the secondary sleeve, which can be used to indicate the insertion depth of the secondary sleeve.

[0065] The primary sleeve and the primary core are used in the initial stage of the operation, and the secondary sleeve and the secondary core are used in the deep operation stage, such as Figure 10 shown. When the neurosurgical nested sleeve assembly is used in brain surgery, it includes the following steps:

[0066] Step 1: Combine and fix the primary sleeve and the primary core, and gradually and slowly embed the combination into the brain tissue and reach the lesion location;

[0067] Step 2: Suture and fix the primary sleeve to the scalp through the suture fixing holes, keep the position of the primary sleeve fixed, withdraw the primary core, form a primary channel for performing surgery on the superficial part, and insert the neuroendoscope, aspirator and bipolar coagulator deep into the bottom of the sleeve to start the hematoma or lesion resection surgery;

[0068] Step 3: After completing the superficial surgery, start the deep lesion surgery, combine and fix the secondary sleeve and the secondary core; gradually embed them to the bottom of the primary sleeve, and use a sleeve with a smaller diameter and longer length to expand the space in the deeper brain tissue;

[0069] Step 4: Push the secondary combination device deep into the brain tissue to the deep hematoma or the interior of the ventricle, fix the secondary sleeve and withdraw the secondary core;

[0070] Step 5: Insert the aspirator deep into the bottom of the secondary sleeve to aspirate the accumulated blood in the deep brain tissue; the angle of the aspiration tube can be adjusted in multiple directions by rotating the aspirator;

[0071] Step 6: Gradually and slowly withdraw the secondary cannula and the primary cannula in sequence after the operation, and pay attention to hemostasis during the withdrawal process.

[0072] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A neuroendoscopic mother-daughter sleeve assembly for deep in the cerebral ventricle, characterized in that: including, a first-stage sleeve, which is a conical cylinder with open ends; a first-stage sleeve core, which is a conical cylinder with open ends and can be inserted into the first-stage sleeve; a second-stage sleeve, which is a cylindrical cylinder or a conical cylinder with open ends and can be inserted into the first-stage sleeve; a second-stage sleeve core, which is a cylindrical cylinder or a conical cylinder with open ends and can be inserted into the second-stage sleeve.

2. The neuroendoscopic mother and daughter sleeve assembly for deep brain ventricles according to claim 1, characterized in that: The first-stage sleeve core fits the inner wall of the first-stage sleeve, and the lower end of the first-stage sleeve core is not shorter than the lower edge of the first-stage sleeve.

3. The neuroendoscopic mother and daughter sleeve assembly for deep brain ventricles according to claim 2, characterized in that: The upper end of the first-stage sleeve is provided with a first-stage sleeve fixing arm, and the upper end of the first-stage sleeve core is provided with a first-stage sleeve core fixing arm, and the positions of the first-stage sleeve fixing arm and the first-stage sleeve core fixing arm are matched; The first-stage sleeve fixing arm is provided with a first positioning protrusion, and the first-stage sleeve core fixing arm is provided with a first positioning groove, and the first positioning protrusion can be engaged with the first positioning groove.

4. The neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles according to claim 2, wherein: The upper end of the first-stage sleeve is symmetrically provided with a pair of first-stage sleeve fixing arms upward, and the upper end of the first-stage sleeve core is provided with a first-stage sleeve core fixing ring, and the first-stage sleeve fixing arm can extend into the first-stage sleeve core fixing ring.

5. The neuroendoscopic mother and daughter sleeve assembly for deep brain ventricles according to claim 1, characterized in that: The second-stage sleeve core can fit the inner wall of the second-stage sleeve, and the lower end of the second-stage sleeve core is not shorter than the lower edge of the second-stage sleeve.

6. The neuroendoscopic mother and daughter sleeve assembly for deep brain ventricles according to claim 5, wherein: The upper end of the second-stage sleeve is provided with a second-stage sleeve fixing arm, and the second-stage sleeve fixing arm is parallel to the axis of the second-stage sleeve.

7. The neuroendoscopic mother and daughter sleeve assembly for deep ventricle according to claim 5, characterized in that: The upper end of the second-stage sleeve is provided with a second-stage sleeve fixing arm, and the upper end of the second-stage sleeve core is provided with a second-stage sleeve core fixing arm, and the positions of the second-stage sleeve fixing arm and the second-stage sleeve core fixing arm are matched; The second-stage sleeve fixing arm is provided with a second positioning protrusion, and the second-stage sleeve core fixing arm is provided with a second positioning groove, and the second positioning protrusion can be engaged with the second positioning groove.

8. The neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles according to any one of claims 1-7, characterized in that: It further includes a suction device, the suction tube of the suction device is arc-shaped; the suction device can penetrate into the first-stage sleeve or the second-stage sleeve; When the second-stage sleeve is a cylindrical cylinder, the inner diameter of the lower edge of the first-stage sleeve is not less than the outer diameter of the second-stage sleeve; when the second-stage sleeve is a conical cylinder, after the second-stage sleeve is inserted into the first-stage sleeve, the gap between the bottom edge of the first-stage sleeve and the outer surface of the second-stage sleeve is not less than 1 mm.

9. The method of using the neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles according to any one of claims 1-8, characterized in that: Combine the first-stage sleeve and the first-stage sleeve core, place them at the set position, and remove the first-stage sleeve core.

10. The method for using the neuroendoscopic mother-daughter sleeve assembly for deep brain ventricles according to claim 9, characterized in that: Combine the second-stage sleeve and the second-stage sleeve core, and insert them into the first-stage sleeve core; Remove the first-stage sleeve and the second-stage sleeve core; Or, combine the second-stage sleeve and the second-stage sleeve core, and insert them into the first-stage sleeve core; Remove the second-stage sleeve core.

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