Micro-channel sheathing canal

Abstract

The microchannel sheathing canal comprises an outer sheath layer, a hole closing device and a navigation pointer, the periphery of the outer sheath layer is cylindrical, the end of the outer sheath layer is conical, and the microchannel sheathing canal is characterized in that a radius-adjustable opening mechanism is arranged in the outer sheath layer, a through hole is formed in the middle of the hole closing device, a fastening bolt is arranged on the side portion of the hole closing device, and the navigation pointer is arranged on the outer sheath layer. The navigation pointer penetrates through a through hole of the obturator and extends into the outer sheath layer, a placer is arranged at the top of the outer sheath layer, and the outer sheath layer is made of a biocompatible material or other transparent materials; by the adoption of the scheme, the diameter of the outer sheath layer can be changed through the opening mechanism, different diameters can be suitable for various brain surgical operations, and the sheath tubes with different lengths can reach brain tissue layers with different depths.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and more specifically, relates to a microchannel sheath. Background Art

[0002] The diagnosis and treatment of brain diseases is a major challenge facing the medical community. The brain is a complex, multi-component tissue that controls body functions through neural networks and is connected to the rest of the body through the spinal cord. The brain and spinal cord are protected by bony structures such as the skull and spine, which increases the difficulty of treatment.

[0003] Some brain diseases, such as intracranial hematoma, abscess, glioblastoma and metastasis, are difficult to treat through the hard skull and complex neural network. Functional diseases such as Alzheimer's disease, Parkinson's disease, epilepsy, etc. are also difficult to treat due to the difficulty in accessing the origin area. In addition, diseases based on the central nervous system and metabolic / regulatory system conditions, such as obesity, hormone regulation conditions, etc., are also challenging to treat.

[0004] When performing surgery to treat brain disorders, great care must be taken to avoid disturbing delicate blood vessels and nerves. Traditionally, accessing deeper areas of the brain requires highly invasive surgical methods, such as the use of brain retractors, but this can lead to complications such as traction injuries. In recent years, the development of stereotactic surgery and frameless image-guided surgery (IGS) has provided new methods for precisely navigating surgical instruments.

[0005] Despite these advances, there is still a need for improved surgical equipment. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a microchannel sheath which can reduce damage to surrounding tissues and increase the scope of surgical operation.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A microchannel sheath tube comprises an outer sheath layer, an obturator and a navigation pointer, wherein the outer sheath layer is cylindrical in outer periphery, the obturator is inserted into the inner part of the outer sheath layer, one end of the obturator is conical in shape, the other end of the obturator is provided with a through hole, a fastening bolt is provided on the side of the obturator near one end of the through hole, the navigation pointer passes through the through hole of the obturator and extends into the inner part of the obturator, a placing device is provided on the top of the outer sheath layer, the outer sheath layer is made of polylactic acid co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI) or polycarbonate, and the obturator is made of 6061 aluminum alloy or polycarbonate;

[0009] The placement device is made of steel wire, one end of which is a notched ring and the other end is a line. A mechanical arm fixer is provided on one side of the line, and one end of the notched ring is sleeved on the outer wall of the outer sheath.

[0010] The invention discloses a microchannel sheath tube, wherein the outer sheath layer is made of polylactic acid co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI), the obturator is made of 6061 aluminum alloy, and a radius-adjustable expansion mechanism is also arranged in the outer sheath layer.

[0011] The present invention discloses a microchannel sheath tube, wherein the expansion mechanism comprises a fixed plate, a ratchet, an operating rod, an expansion rod, a fixed rod and a spring ratchet lock, wherein a card slot is provided on the circumferential side of the ratchet, wherein the ratchet is arranged on the top of the fixed plate and can slide relatively with the fixed plate, the fixed rods are evenly arranged on the bottom of the fixed plate, and the operating rod is arranged on the circumferential surface of the top of the fixed plate.

[0012] The present invention discloses a microchannel sheath tube, wherein a through hole is provided in the middle of the ratchet wheel, and a plurality of arc through holes are evenly distributed around the ratchet wheel through hole, and a spreading rod is provided in each arc through hole, and the spreading rod is connected to the fixing plate through a connecting piece, and when the spreading mechanism reaches the minimum radius, all the spreading rods can be connected end to end to form a cylinder.

[0013] The invention discloses a microchannel sheath tube, wherein the outer sheath layer is made of polycarbonate, the obturator is made of 6061 aluminum alloy, the inner wall of the outer sheath layer is provided with an auxiliary channel, and a hemostat or part of surgical instruments is arranged in the auxiliary channel.

[0014] The present invention discloses a microchannel sheath tube, wherein the obturator comprises a hollow cylindrical connecting rod, a navigation mounting nut, a screw and a conical head, wherein the screw and the conical head are integrally formed, the other end of the screw is threadedly connected to the connecting rod, a navigation mounting nut is arranged at the other end of the screw away from the connecting rod, and a fastening bolt is arranged on the side of the navigation mounting nut.

[0015] The invention discloses a microchannel sheath tube, wherein a connecting rod is provided with a plurality of through holes on the side of the rod body near the conical head, and a plurality of groove holes are evenly distributed around the connecting rod body.

[0016] The invention discloses a microchannel sheath tube, wherein the other end of the outer sheath layer away from the conical end is provided with knurling.

[0017] The invention discloses a microchannel sheath tube. The outer sheath layer is made of polylactic acid co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI) or polycarbonate, and the obturator is made of polycarbonate.

[0018] The invention discloses a microchannel sheath tube, wherein the outer sheath layer can also be elliptical or duckbill shaped.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The outer sheath is designed to observe nearby anatomical structures and minimize light reflection. Different obturator lengths are used to reach superficial or deep subcortical abnormalities. The outer sheath port has a sheath placer to facilitate the placement and stability of the sheath. The fastening bolt can lock the position of the navigation pointer placed in the obturator.

[0021] 2. The expansion mechanism can change the diameter of the outer sheath. Different diameters can be used in a variety of brain surgeries. Sheaths of different lengths can reach different depths of brain tissue layers.

[0022] 3. A gripping knurling pattern is set at the proximal end of the outer sheath, and the groove texture is convenient for gripping. The obturator adopts a hollow design to reduce the weight of the obturator and prevent the formation of a vacuum-sealed environment during the operation.

[0023] 4. Adding a metal kit at the end of the sheath can facilitate the combination of the sheath and the expander, and adding a ratchet self-locking device to the expander mechanism can lock the expander rod at any position to control the inner diameter of the sheath.

[0024] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following is a brief description of the contents and symbols in the drawings of this specification:

[0026] Figure 1 is a schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the connection between the expansion mechanism and the outer sheath layer of the present invention;

[0028] Figure 3 It is a schematic diagram of the propping mechanism of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the obturator of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the placement device of the present invention;

[0031] Figure 6 It is a schematic diagram of the outer sheath structure of the present invention;

[0032] Figure 7 It is a schematic diagram of the elliptical structure of the present invention;

[0033] The markings in the figure are: 1. outer sheath; 101. auxiliary channel; 2. obturator; 201. connecting rod; 202. navigation mounting nut; 203. screw; 204. conical head; 3. fastening bolt; 4. navigation pointer; 5. placer; 501. mechanical arm holder; 6. fixing plate; 7. ratchet; 8. operating lever; 9. spring ratchet lock; 10. expansion rod; 11. fixing rod; 12. knurling. DETAILED DESCRIPTION

[0034] The following, with reference to the accompanying drawings, provides a further detailed description of the specific implementation methods of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operating methods, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0035] like Figure 1 A microchannel sheath tube shown includes an outer sheath layer 1, an obturator 2 and a navigation pointer 4. The outer sheath layer 1 is cylindrical in outer periphery, the obturator 2 extends into the outer sheath layer 1, one end of the obturator 2 is conical, and the other end of the obturator 2 is provided with a through hole. A fastening bolt 3 is provided on the side of the obturator 2 close to one end of the through hole. The navigation pointer 4 passes through the through hole of the obturator 2 and extends into the obturator 2. A placer 5 is provided on the top of the outer sheath layer 1. The outer sheath layer 1 is made of polylactic acid-co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI) or polycarbonate, and the obturator 2 is made of 6061 aluminum alloy or polycarbonate; a knurl 12 is provided at the other end of the outer sheath layer 1 away from the conical end; the outer sheath layer 1 is made of polylactic acid-co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI) or polycarbonate, and the obturator 2 is made of polycarbonate.

[0036] like Figure 5 The placement device 5 shown is made of steel wire, one end of which is in the shape of a notched ring and the other end is in the shape of a line, wherein a mechanical arm fixer 501 is provided on one side of the line, and one end of the notched ring is sleeved on the outer side wall of the outer sheath layer.

[0037] like Figure 2 and Figure 3The outer sheath 1 shown is made of polylactic acid co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI), and the obturator 2 is made of 6061 aluminum alloy, wherein the outer sheath 1 is also provided with a radius-adjustable expansion mechanism; the expansion mechanism includes a fixed plate 6, a ratchet 7, an operating rod 8, an expansion rod 10, a fixed rod 11 and a spring ratchet lock 9, a slot is provided on the circumferential side of the ratchet 7, wherein the ratchet 7 is arranged on the top of the fixed plate 6 and can slide relatively with the fixed plate 6, the fixed rod 11 is evenly arranged at the bottom of the fixed plate 6, and the operating rod 8 is arranged on the circumferential surface of the top of the fixed plate 6; a through hole is provided in the middle of the ratchet 7, and a plurality of arc through holes are evenly distributed around the through hole of the ratchet 7, and an expansion rod 10 is arranged in each arc through hole, and the expansion rod 10 is connected to the fixed plate 6 through a connecting piece. When the expansion mechanism reaches the minimum radius, all the expansion rods 10 can be connected end to end to form a cylinder.

[0038] like Figure 6 The outer sheath 1 is made of polycarbonate, and the obturator 2 is made of 6061 aluminum alloy. An auxiliary channel 101 is provided on the inner wall of the outer sheath 1 , and a hemostat or some surgical instruments are arranged in the auxiliary channel 101 .

[0039] like Figure 4 The obturator shown includes a hollow cylindrical connecting rod 201, a navigation mounting nut 202, a screw 203 and a conical head 204, wherein one end of the screw 203 is fixedly connected to the conical head 204, the other end of the screw 204 is threadedly connected to the connecting rod 201, the other end of the connecting rod 201 away from the screw 203 is provided with a navigation mounting nut 202, and the side of the navigation mounting nut 202 is provided with a fastening bolt 3; the side of the connecting rod 201 near the conical head 204 is provided with a plurality of through holes, and the connecting rod 201 is evenly distributed with a plurality of groove holes around the rod.

[0040] like Figure 7 The outer sheath shown may also be oval or duckbill shaped.

[0041] Example 1

[0042] Used in complex and delicate brain tissue surgery to reduce damage to surrounding tissues during insertion of the outer sheath.

[0043] The material of the outer sheath 1 is PLCL-HDI, and the material of the obturator 2 is 6061 aluminum alloy;

[0044] The arc-shaped part of the placement device 5 is engaged with the lower end of the knurling 12 of the outer sheath layer 1, and the navigation pointer 4 is inserted into the obturator 2. The front section of the navigation pointer 4 is connected to the maximum conical cross-section of the front end of the obturator 2 and fixed by the fastening bolt 3. The navigation pointer 4 is externally connected to the medical system. Under the guidance of the system, the microchannel sheath is sent to the designated surgical area. The obturator 2 and the navigation pointer 4 are taken out, and the placement device 5 is fixed by the mechanical arm fixer 501.

[0045] The obturator 2 fixes the navigation pointer 4 and is inserted into the outer sheath 1. The placement device 5 is fixed to the port of the outer sheath 1. According to the instructions of the external navigation system, the sheath is placed to the target area to be operated on through the placement device 5.

[0046] The obturator 2 and the navigation pointer 4 are taken out, and the operating lever 8 is operated to adjust the expansion mechanism to the minimum so that the radius of the outer sheath 1 reaches the minimum state, thereby reducing the loss of the surrounding brain tissue;

[0047] The remaining outer sheath 1 forms a surgical microchannel, and then the operating rod 8 is operated to adjust the expansion mechanism to the maximum so that the radius of the outer sheath 1 reaches the maximum state, and the surgical instruments reach the surgical area through the microchannel to perform surgery, which facilitates the surgical operation. Note: The adjustable diameter range of the expansion mechanism in the present invention is 10mm-14mm.

[0048] Exit: operate the operating lever 8 to adjust the expansion mechanism to the minimum so that the radius of the outer sheath 1 reaches the minimum state, and then take out the outer sheath 1.

[0049] Embodiment 2:

[0050] Used in general brain tissue surgery.

[0051] The material of the outer sheath 1 is polycarbonate, and the material of the obturator 2 is 6061 aluminum alloy;

[0052] The arc-shaped part of the placement device 5 is engaged with the lower end of the knurling 12 of the outer sheath layer 1, and the navigation pointer 4 is inserted into the obturator 2. The front section of the navigation pointer 4 is connected to the largest conical cross section of the front end of the obturator 2 and fixed by the fastening bolt 3. The navigation pointer is externally connected to the medical system. Under the guidance of the system, the microchannel sheath is sent to the designated surgical area. The obturator 2 and the navigation pointer 4 are taken out, and the placement device 5 is fixed by the mechanical arm fixer 501.

[0053] The interlayer bloodletting instrument and some surgical instruments inside the outer sheath layer 1 reduce the mutual influence between the surgical instruments, thereby reducing the adverse effects caused by improper operation of personnel.

[0054] Embodiment 3:

[0055] Reusable medical devices are used to meet the surgical habits of different doctors and reduce the reliance on navigation systems during surgery. However, they are only suitable for the insertion of sheaths when the surrounding tissues are free of nerves, arteries and other dangerous parts. The obturator can be used to promote the insertion of the sheath, and the placer is fixed on the outer sheath layer, and then fixed by the mechanical arm;

[0056] The outer sheath is made of polycarbonate or PLCL-HDI, and the obturator is made of 6061 aluminum alloy;

[0057] The obturator 2 is modified by changing the original integrated forming of the cone head 204 and the connecting rod 201 to a bolt connection between the connecting rod 201 and the screw rod 203. For experienced doctors who are not used to using the navigation system, the front cone 204 can be unscrewed. At this time, the front end of the obturator 2 is hollowed out, and the front surgical site can be seen with the naked eye. Because the hollowed-out circular hole is small, the damage to the surrounding tissues can be ignored.

[0058] The placer 5 is engaged with the lower end of the knurling 12 of the outer sheath 1, and the obturator 2 with the conical head 204 removed is inserted into the outer sheath 1. The sheath is placed in the target area by visual judgment, and the obturator 2 is taken out. The placer 5 is fixed by the mechanical arm fixer 501, and a surgical microchannel is formed at this time to provide the doctor with a surgical channel.

[0059] Embodiment 4:

[0060] Provides better field of view;

[0061] The outer sheath 1 is made of polycarbonate or PLCL-HDI, and the obturator 2 is made of polycarbonate;

[0062] At this time, the outer sheath 1 and the obturator 2 are both in a transparent state, and the navigation pointer 4 and the human eye assist each other to place the sheath in the target area. The placer 5 is fixed by the robot arm fixer 501, and the obturator 2 and the navigation pointer 4 are taken out to form a surgical microchannel.

[0063] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A microchannel sheath, characterized in that: It comprises an outer sheath, an obturator and a navigation pointer. The outer sheath is cylindrical, the obturator goes deep into the outer sheath, one end of the obturator is conical, the other end of the obturator is provided with a through hole, a fastening bolt is provided on the side of the obturator near one end of the through hole, the navigation pointer passes through the through hole of the obturator and extends into the obturator, a placement device is provided on the top of the outer sheath, the outer sheath is made of biocompatible material or other transparent material, and the obturator is made of 6061 aluminum alloy or polycarbonate; The placement device is made of steel wire, one end of which is in the shape of a notched ring and the other end is in the shape of a line, wherein a mechanical arm fixer is arranged on one side of the line, and one end of the notched ring is sleeved on the outer wall of the outer sheath layer.

2. The microchannel sheath according to claim 1, characterized in that: The outer sheath is made of polylactic acid co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI), and the obturator is made of 6061 aluminum alloy. A radius-adjustable opening mechanism is also arranged in the outer sheath.

3. The microchannel sheath according to claim 2, characterized in that: The expansion mechanism includes a fixed plate, a ratchet, an operating rod, an expansion rod, a fixed rod and a spring ratchet lock, a card slot is provided on the circumferential side of the ratchet, wherein the ratchet is arranged on the top of the fixed plate and can slide relative to the fixed plate, the fixed rods are evenly arranged at the bottom of the fixed plate, and the operating rod is arranged on the circumferential surface of the top of the fixed plate.

4. A microchannel sheath according to claim 3, characterized in that: A through hole is provided in the middle of the ratchet, and a plurality of arc through holes are evenly distributed around the ratchet through hole. A spreading rod is provided in each arc through hole, and the spreading rod is connected to the fixed plate through a connecting piece. When the spreading mechanism reaches the minimum radius, all the spreading rods can be connected end to end to form a cylinder.

5. A microchannel sheath according to claim 1, characterized in that: The outer sheath is made of polycarbonate, and the obturator is made of 6061 aluminum alloy. An auxiliary channel is arranged on the inner wall of the outer sheath, and a hemostat or some surgical instruments are arranged in the auxiliary channel.

6. A microchannel sheath according to claim 1, characterized in that: The obturator includes a hollow cylindrical connecting rod, a navigation mounting nut, a screw and a conical head, wherein the screw and the conical head are integrally formed, the other end of the screw is threadedly connected to the connecting rod, a navigation mounting nut is provided at the other end of the connecting rod away from the screw, and a fastening bolt is provided on the side of the navigation mounting nut.

7. A microchannel sheath according to claim 1, characterized in that: The side of the connecting rod near the conical head is provided with a plurality of through holes, and a plurality of groove holes are evenly distributed around the connecting rod.

8. The microchannel sheath according to claim 1, characterized in that: The other end of the outer sheath away from the conical end is provided with knurling.

9. The microchannel sheath according to claim 1, characterized in that: The outer sheath layer is made of polylactic acid co-caprolactone copolymer-hexamethylene diisocyanate (PLCL-HDI) or polycarbonate, and the obturator is made of polycarbonate.

10. The microchannel sheath according to claim 1, characterized in that: The outer sheath layer may also be elliptical or duckbill shaped.

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