A minimally invasive device capable of accurately placing a channel and a drain

Abstract

The application discloses a minimally invasive device capable of accurately placing a channel and a drainage tube, comprising a channel mechanism; the channel mechanism cooperates with a channel and an inner channel to send the channel and the drainage tube to a lesion, the inner channel in the inner layer is pulled out, and surgical operation can be performed through the channel; the puncture direction determined through 3D-slicer software can be realized, the device can be perfectly docked, the navigation function of accurate positioning can be achieved, any part can be accurately positioned without referring to the anatomical landmark line of the scalp and the skull, the tube core head end of the brain tissue can be expanded, the arteries and the veins can be effectively protected, the degree of trauma is minimized, one person can operate, the depth of the channel and the drainage tube and the liquid volume injected by the tube core head end can be quantified, and the device is suitable for better popularization and use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brain surgery, in particular to a minimally invasive device capable of accurately placing a channel and a drainage tube. BACKGROUND

[0002] Puncture is a medical term commonly used in surgery, which is a diagnostic and therapeutic technique of inserting a puncture needle into a body cavity to extract secretions for testing, injecting gas or contrast medium for contrast examination, or injecting drugs into the body cavity; The purpose of puncture is to extract blood for testing, blood transfusion, infusion and placement of catheter for angiography.

[0003] With the development of neuroendoscopic technology and microsurgery technology, the application range of channel placement in lesions for lesion resection is becoming more and more extensive. How to place the channel and the drainage tube into the predetermined target point? At present, CT positioning method and 3D-slicer software positioning method are used to place the channel or drainage tube by visual observation. Obviously, this will produce a large error, resulting in deviation of puncture position or puncture failure. SUMMARY

[0004] The present application provides a minimally invasive device capable of accurately placing a channel and a drainage tube, which can effectively solve the problems in the above background technology.

[0005] To achieve the above object, the present application provides the following technical scheme: a minimally invasive device capable of accurately placing a channel and a drainage tube, comprising a channel mechanism;

[0006] The channel mechanism cooperates with the inner channel to send the channel 101 and the drainage tube to the lesion, and the inner layer of the inner channel is removed, so that the operation can be performed through the channel;

[0007] A handheld laser fixing mechanism;

[0008] The laser lights of the fixed support, the movable support and the ranging support in the handheld laser fixing mechanism measure and fix the position of the head, and position the puncture position and direction of the brain;

[0009] A connecting mechanism;

[0010] The connecting mechanism can be flexibly detached and installed with the handheld laser fixing mechanism;

[0011] A lock cap is installed at the top end of the support barrel of the handheld laser fixing mechanism, a through hole is formed at the top end of the lock cap, an air inlet pipe is connected to the outside of the lock cap through the through hole, and the air inlet pipe is connected with a syringe;

[0012] A channel changing mechanism;

[0013] The gas storage bag at the bottom end of the dilator is expanded and reduced to expand the large channel along the dilator.

[0014] According to the above technical scheme, the channel mechanism comprises a channel, an inner channel, a rubber sleeve, an expansion conical head, expansion slits and an expansion head;

[0015] The inner channel is sleeved on the inner side of the channel, the bottom end of the inner channel is connected with the expansion conical head through screw connection, a plurality of expansion slits are formed on the surface of the expansion conical head, and the bottom end of the expansion conical head below the expansion slits is connected with the expansion head;

[0016] The bottom end of the inner channel is sleeved with a rubber sleeve on the outer side of the expansion conical head;

[0017] The edge of the channel is provided with a semicircular handle, and the outer diameter of the inner channel is smaller than the inner diameter of the channel.

[0018] According to the above technical scheme, the connecting mechanism comprises a large U-shaped groove, a small U-shaped groove, a clamping ring center pin, a limiting column, a reset spring and a limiting groove;

[0019] The other side of the large U-shaped groove is connected with the small U-shaped groove, the two large U-shaped grooves are connected into a U-shaped clamp through the clamping ring center pin, the inner side of the small U-shaped groove is provided with a limiting column, the two limiting columns are directly sleeved with a reset spring, and the inner side of the large U-shaped groove is provided with a limiting groove;

[0020] The large U-shaped groove is in the shape of four-fifths of a circular arc.

[0021] According to the above technical scheme, the handheld laser fixing mechanism comprises a support barrel, a control display, a fixed support, a movable support, a laser hole, a laser lamp, a ball, a ball spring, a limiting groove, a guide cap and a distance measuring support;

[0022] The fixed cap is clamped at the top end of the support barrel, the control display is sleeved on the outer side of the support barrel, the movable support is sleeved on the outer side of the support barrel below the control display, the fixed support is sleeved on the outer side of the support barrel below the movable support, and the distance measuring support is connected to the middle of the movable support;

[0023] Laser holes are formed in the two ends of the fixed support and the two ends of the movable support and the bottom end of the distance measuring support, the laser lamp is embedded and installed in the laser hole, and the power end of the laser lamp is connected with the signal of the control display;

[0024] One end of the movable support is connected with the ball spring, the other end of the ball spring is connected with the ball, and the ball is embedded in the inner side of the support barrel.

[0025] The bottom end of the support barrel is connected with the guide cap, the guide cap is connected with the inner channel through threads, the inner channel and the support barrel are penetrated by a through channel, and the limiting groove is formed on the surface of the support barrel at the top end of the through channel.

[0026] According to the technical scheme, the small drainage mechanism comprises a small drainage catheter, a plug-in steel needle and a steel needle round head.

[0027] The plug-in steel needle is sleeved on the inner side of the small drainage catheter, and the steel needle round head is arranged at the top end of the plug-in steel needle.

[0028] The outer diameter of the small drainage catheter is equal to the inner diameter of the through hole, and the length of the plug-in steel needle is greater than the length of the small drainage catheter.

[0029] According to the technical scheme, the large drainage mechanism comprises a large drainage catheter, a pressing steel needle and a limiting head.

[0030] The pressing steel needle is sleeved on the inner side of the large drainage catheter, and the limiting head is connected to the top end of the pressing steel needle.

[0031] The diameter of the limiting head is equal to the inner diameter of the limiting groove, and the lengths of the large drainage catheter and the pressing steel needle are equal.

[0032] According to the technical scheme, the lengths of the fixed support, the movable support and the distance measuring support are different.

[0033] The control display is provided with a display screen, an on-off switch and a reset switch on the surface.

[0034] According to the technical scheme, the channel switching mechanism comprises a channel support pipe, a large channel, an extension pipe, a dilator, an air inlet channel, a gas storage bag and an arc-shaped edge.

[0035] The dilator is sleeved on the outer side of the channel support pipe, the inner wall of the dilator is provided with the air inlet channel, the air inlet channel is connected to the gas storage bag in the dilator, and the arc-shaped edge is arranged at the bottom end of the gas storage bag.

[0036] The inner diameter of the large channel is greater than the outer diameter of the channel, and the diameter of the channel support pipe is smaller than the inner diameter of the channel.

[0037] Compared with the prior art, the present application has the advantages that the structure is scientific and reasonable, safe and convenient to use, the puncture direction determined by the 3D-slicer software can be realized, the device can be perfectly docked, the navigation function of precise positioning can be achieved, any part can be precisely positioned without referring to the anatomical landmark line of the scalp and skull, the tube core head end can be expanded, the arteries and veins can be effectively protected, the degree of trauma is minimized, one person can operate, the depth of the channel and the drainage tube and the amount of liquid injected into the tube core head end can be quantified, and the present application is suitable for better popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, which is used together with the embodiments of the present application to explain the present application, and do not constitute a limitation of the present application.

[0039] In the drawings:

[0040] Figure 1 is a schematic diagram of the stereoscopic structure of the present application;

[0041] Figure 2 is a schematic diagram of the passage mechanism structure of the present application;

[0042] Figure 3 is a schematic diagram of the handheld laser fixation mechanism structure of the present application;

[0043] Figure 4 is a schematic diagram of the connection mechanism structure of the present application;

[0044] Figure 5 is a schematic diagram of the passage cross-sectional structure of the present application;

[0045] Figure 6 is a schematic diagram of the ball and ball spring installation structure of the present application;

[0046] Figure 7 is a schematic diagram of the small drainage mechanism structure of the present application;

[0047] Figure 8 is a schematic diagram of the fixed rod installation structure of the present application;

[0048] Figure 9 is a schematic diagram of the small drainage catheter installation structure of the present application;

[0049] Figure 10 is a schematic diagram of the relationship between the small drainage catheter and the plug-in steel needle of the present application;

[0050] Figure 11 is a schematic diagram of the large drainage mechanism structure of the present application;

[0051] Figure 12 is a schematic diagram of the large drainage catheter and the position of the pressing steel needle of the present application;

[0052] Figure 13 is a schematic diagram of the relationship between the large drainage catheter and the lock cap of the present application;

[0053] Figure 14 is a schematic diagram of the passage changing mechanism structure of the present application;

[0054] Figure 15 is a schematic diagram of the dilator cross-sectional structure of the present application;

[0055] Figure 16 is a schematic diagram of the 3D-slicer software analysis structure of the present application;

[0056] Figure label: 1, channel mechanism; 101, channel; 102, inner channel; 103, rubber sleeve; 104, expansion cone head; 105, expansion seam; 106, expansion head;

[0057] 2, handheld laser fixing mechanism; 201, support barrel; 202, control display; 203, fixed support; 204, movable support; 205, laser hole; 206, laser lamp; 207, ball; 208, ball spring; 2010, limiting groove; 2011, guide cap; 2012, ranging support; 2013, small drainage catheter; 2014, plug-in steel needle; 2015, steel needle round head; 2016, large drainage catheter; 2017, steel needle; 2018, limiting head;

[0058] 3, connecting mechanism; 301, large U-shaped groove; 302, small U-shaped groove; 303, clamping ring center pin; 304, limiting column; 305, reset spring; 306, limiting groove;

[0059] 4, lock cap; 5, air inlet pipe; 6, syringe; 7, through channel; 8, through hole;

[0060] 9, channel changing mechanism; 901, channel support pipe; 903, large channel; 904, extension pipe; 905, dilator; 906, air inlet channel; 907, air storage bag; 908, arc-shaped edge. DETAILED DESCRIPTION

[0061] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0062] Embodiment: as shown in the figure, the present application provides a technical solution, Figures 1-16

[0063] A minimally invasive device capable of accurately placing channels and drainage tubes, comprising a channel mechanism 1;

[0064] The channel mechanism 1 cooperates with the channel 101 and the inner channel 102 to send the channel 101 and the drainage tube to the lesion, and then the inner channel 102 is removed, and the operation can be performed through the channel 101;

[0065] The channel mechanism 1 comprises a channel 101, an inner channel 102, a rubber sleeve 103, an expansion cone head 104, an expansion seam 105, and an expansion head 106;

[0066] ​The inner channel 102 is sleeved with the inner channel 101, and the bottom end of the inner channel 102 is connected with the expansion cone head 104 through screw connection. The expansion cone head 104 is provided with a plurality of expansion slots 105 on the surface, which is convenient for discharging liquid or air. The bottom end of the expansion cone head 104 below the expansion slots 105 is connected with the expansion head 106.

[0067] The bottom end of the inner channel 102 is sleeved with the rubber sleeve 103 outside the expansion cone head 104;

[0068] The channel 101 is provided with a semicircular handle at the side, which is convenient for taking out the channel 101 in the later period. The outer diameter of the inner channel 102 is smaller than the inner diameter of the channel 101, which is convenient for taking out the inner channel 102.

[0069] The handheld laser fixing mechanism 2;

[0070] The laser lamp 206 of the fixed support 203, the movable support 204, and the distance measuring support 2012 in the handheld laser fixing mechanism 2 measures and fixes the position of the head, and positions the puncture position and direction of the brain;

[0071] The handheld laser fixing mechanism 2 includes a support barrel 201, a control display 202, a fixed support 203, a movable support 204, a laser hole 205, a laser lamp 206, a ball 207, a ball spring 208, a limiting groove 2010, a guide cap 2011, and a distance measuring support 2012;

[0072] The fixed cap 108 is clamped at the top end of the support barrel 201. The support barrel 201 is sleeved with the control display 202 outside. The support barrel 201 outside below the control display 202 is sleeved with the movable support 204. The support barrel 201 outside below the movable support 204 is sleeved with the fixed support 203. The movable support 204 is connected with the distance measuring support 2012 in the middle;

[0073] The both ends of the fixed support 203 and the both ends of the movable support 204 are provided with the laser hole 205 at the bottom end of the distance measuring support 2012. The laser lamp 206 is embedded and installed in the laser hole 205. The power end of the laser lamp 206 is connected with the signal of the control display 202;

[0074] One end of the movable support 204 inside is connected with the ball spring 208. The other end of the ball spring 208 is connected with the ball 207. The ball 207 is embedded in the inside of the support barrel 201;

[0075] The bottom end of the support barrel 201 is connected with the guide cap 2011. The guide cap 2011 is connected with the inner channel 102 through screw connection. The inner channel 102 and the support barrel 201 are penetrated by a through channel 7. The surface of the support barrel 201 at the top end of the through channel 7 is provided with the limiting groove 2010;

[0076] The small drainage mechanism comprises a small drainage catheter 2013, a plug-in steel needle 2014 and a steel needle round head 2015;

[0077] The plug-in steel needle 2014 is sleeved on the inner side of the small drainage catheter 2013, and the steel needle round head 2015 is arranged at the top end of the plug-in steel needle 2014;

[0078] The outer diameter of the small drainage catheter 2013 is equal to the inner diameter of the through hole 8, so that the small drainage catheter 2013 can be prevented from shaking, and the length of the plug-in steel needle 2014 is greater than the length of the small drainage catheter 2013, so that the plug-in steel needle 2014 can be conveniently taken out in the later period;

[0079] The large drainage mechanism comprises a large drainage catheter 2016, a downward pressing steel needle 2017 and a limiting head 2018;

[0080] The downward pressing steel needle 2017 is sleeved on the inner side of the large drainage catheter 2016, and the limiting head 2018 is connected to the top end of the downward pressing steel needle 2017;

[0081] The diameter of the limiting head 2018 is equal to the inner diameter of the limiting groove 2010, so that the limiting head 2018 can be conveniently limited, and the lengths of the large drainage catheter 2016 and the downward pressing steel needle 2017 are equal;

[0082] The large U-shaped groove 301 is in the shape of four-fifths of a circle.

[0083] The fixed support 203, the movable support 204 and the distance measuring support 2012 have different lengths;

[0084] The control display 202 is provided with a display screen, an on-off switch and a reset switch on the surface.

[0085] The connecting mechanism 3;

[0086] The connecting mechanism 3 can be flexibly disassembled and assembled with the handheld laser fixing mechanism 2;

[0087] The connecting mechanism 3 comprises a large U-shaped groove 301, a small U-shaped groove 302, a clamping ring center pin 303, a limiting column 304, a reset spring 305 and a limiting groove 306;

[0088] The other side of the large U-shaped groove 301 is connected with the small U-shaped groove 302, the two large U-shaped grooves 301 are connected into a U-shaped clamp through the clamping ring center pin 303, the limiting column 304 is arranged on the inner side of the small U-shaped groove 302, the two limiting columns 304 are directly sleeved with the reset spring 305, and the limiting groove 306 is arranged on the inner side of the large U-shaped groove 301;

[0089] The top end of the support barrel 201 of the handheld laser fixing mechanism 2 is provided with a lock cap 4, the top end of the lock cap 4 is provided with a through hole 8, the outer side of the lock cap 4 is connected with an air inlet pipe 5 through the through hole 8, and the air inlet pipe 5 is connected with a syringe 6;

[0090] The switching channel mechanism 9;

[0091] By expanding and reducing the air bag 907 at the bottom end of the dilator 905, the large channel 903 is expanded along the dilator 905.

[0092] The channel changing mechanism 9 comprises a channel support pipe 901, a large channel 903, an extension pipe 904, a dilator 905, an air inlet channel 906, an air bag 907 and an arc edge 908.

[0093] The dilator 905 is sleeved outside the channel support pipe 901, the air inlet channel 906 is arranged on the inner wall of the dilator 905, the air inlet channel 906 is connected with the air bag 907 in the dilator 905, and the arc edge 908 is arranged at the bottom end of the air bag 907.

[0094] The inner diameter of the large channel 903 is greater than the outer diameter of the channel 101, and the diameter of the channel support pipe 901 is smaller than the inner diameter of the channel 101, so that the channel 101 can be conveniently taken out in the later period.

[0095] The working principle and use process of the present application are as follows: first, the approximate position is determined by the medical staff, the scanning data of CT is imported into the 3D-slicer software, the puncture direction is determined, the fixed support 203 of the handheld laser fixing mechanism 2 is first positioned, the relevant position can be determined under the irradiation of the four laser lamps 206, the movable support 204 is rotated first to realize the perpendicularity of the light, the laser lamp 206 at the bottom end of the ranging support 2012 is used for ranging, all data information is transmitted to the display at the top end of the control display 202 for real-time watching, and the surface switch of the control display 202 is used for opening and closing the laser lamp 206.

[0096] The laser emitted by the four laser lamps 206 is two mutually perpendicular planes, which are two mutually perpendicular laser lines when intersecting with the scalp, the position is rotated, and the two mutually perpendicular laser lines coincide with the previously described arc line, so that the mutually perpendicular planes determined by the 3D-slicer software and the mutually perpendicular planes determined by the laser lamp 206 are mutually continuous.

[0097] The ball 207 is embedded in the vertical plane in order to facilitate the vertical movement of the movable support 204. When the movable support 204 is moved, a part of resistance is generated, and the verticality can be determined. Thus, the movement and limiting of the movable support 204 are facilitated, and the position direction is determined. Two mutually perpendicular planes formed by the infrared directional device are completely coincident with the line determined by the body surface and the 3D-slicer software. The channel to be placed is located on the intersection plane, which is the extension of the intersection line of the two planes determined by the 3D-slicer software. The accuracy of the puncture direction can be achieved.

[0098] The scalp incision is 4 cm, and a locking bone flap with a diameter of 2.5 cm is formed by a grinding brick and a milling cutter with the point as the center. In the working state of the design, the two mutually perpendicular laser lines are coincident with the line traced on the scalp. The range finder of the range finding support 2012 can read the depth of the entry. Then, the head is drilled, and the channel 101 is placed as a whole. The position can be determined under the action of the laser lamp 206. The syringe 6 is pressed down, and the air is transported through the inner channel 102 and the channel inside the support barrel 201. At this time, the expansion cone head 104 expands the rubber sleeve 103 under the air flow of the expansion slit 105. The brain tissue is inflated by injecting liquid through the syringe 6. Then, the gas or liquid in the rubber sleeve 103 is sucked back, and the outer channel 101 is pushed forward. The predetermined position is achieved by repeated operation. The distance at this time is transmitted to the display at the top of the control display 202 by the laser lamp 206 at the bottom end of the range finding support 2012, and the predicted depth is determined.

[0099] The second use of the design is to place the small drainage catheter 2013 to the predetermined position. After the handheld laser fixing mechanism 2 is installed with the lock cap 4 and the guide cap 2011, the small drainage catheter 2013 and the plug-in steel needle 2014 are sleeved and inserted from the through hole 8 at the top of the lock cap 4 and the inner hole of the guide cap 2011. The bone cone drills the scalp, skull, and dura mater. In the working state of the design, the two mutually perpendicular laser lines are coincident with the line traced on the scalp. According to the data of the 3D-slicer software, the small drainage catheter 2013 is placed to the predetermined depth. Then, the plug-in steel needle 2014 is removed, and other positioning devices are removed. Only the small drainage catheter 2013 is left. After the small drainage catheter 2013 is successfully placed, the small drainage catheter 2013 is connected with the negative pressure device for normal drainage.

[0100] The third use of the design is to place a large drainage tube to a preset position, the large drainage catheter 2016 and the lower steel needle 2017 are sleeved and inserted from the through channel 7, the locking cap 4 of the handheld laser fixing mechanism 2 is installed, the limiting head 2018 is limited in the limiting groove 2010, the lower steel needle 2017 is fixed and integrated with the handheld laser fixing mechanism 2, the bone cone drills the scalp, the skull and the dura mater, in the working state of the design, two mutually perpendicular laser lines coincide with the lines traced on the scalp, the lower steel needle 2017 drives the large drainage catheter 2016 to enter the bleeding area by pressing the overall handheld laser fixing mechanism 2, the depth of the entering can be measured by the range finder of the ranging support 2012, the large drainage catheter 2016 is placed to a preset depth, the handheld laser fixing mechanism 2 and the lower steel needle 2017 are moved out as a whole, at this time the large drainage catheter 2016 is left, then the large drainage catheter 2016 is connected with the negative pressure device to perform normal drainage;

[0101] The fourth use of the design is to replace the channel with a large channel, the large channel is placed to a required position, when the patient appears shock, is critically ill or is operated, the channel support pipe 901 is inserted into the channel 101 and the channel 101 is pulled out, only the channel support pipe 901 is left, then the dilator 905 and the extension pipe 904 are put outside the channel support pipe 901, then the large channel 903 is placed outside the extension pipe 904, the air inlet channel 906 is connected with the syringe 6 through the air inlet pipe 5 by the operating personnel, the syringe 6 fills the gas into the gas storage bag 907, the brain tissue can be expanded, then the large channel 903 is expanded in the brain tissue, is slowly moved and is repeatedly operated, the large channel 903 is moved to a required position (the large channel 903 has a scale on the surface), the gas is drawn back, the dilator 905, the extension pipe 904 and the lower channel support pipe 901 are moved out as a whole, so that the brain operation operation in the later period is realized;

[0102] The operation risk of the plug-in device in the operation is reduced, the overall device does not need to be disassembled and replaced, different liquid pumping modes can be selected according to different states, and the operation is more flexible;

[0103] The puncture direction determined by the 3D-slicer software can be realized, the device can be perfectly docked, the precise positioning navigation function can be achieved, any part can be precisely positioned without referring to the anatomical landmark line of the scalp and the skull, the tube core head end can expand the brain tissue, the arteries and the veins are effectively protected, the trauma is minimized, one person can operate without the need of multiple people, the depth of the channel and the drainage tube and the liquid volume injected by the tube core head end can be quantified, and the device is suitable for better popularization and use.

[0104] Finally, it should be noted that the above only describes the preferred examples of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments, or some of the technical features thereof can be replaced equivalently, without departing from the spirit and principle of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A minimally invasive device capable of precisely placing channels and drainage tubes, characterized in that: Including channel mechanisms; The channel mechanism works together with the inner channel to deliver the channel and drainage tube to the lesion. The inner layer of the inner channel is removed, and the surgical procedure can then be performed through the channel. Handheld laser fixing mechanism; The laser lights in the handheld laser fixation mechanism, including the fixed bracket, movable bracket, and ranging bracket, measure and fix the position of the head, thereby locating the puncture point and direction in the brain. Connection mechanism; The connecting mechanism allows for flexible disassembly and installation of the handheld laser fixing mechanism; The top of the support barrel of the handheld laser fixing mechanism is equipped with a locking cap, and the top of the locking cap has a through hole. An air inlet pipe is connected to the outside of the locking cap through the through hole, and the air inlet pipe is connected to the syringe. Changing channel mechanism; The large channel is expanded along the expander by the expansion and contraction of the air bladder at the bottom of the expander; The channel mechanism includes a channel, an inner channel, a rubber sleeve, an expanding cone head, an expanding slot, and an expanding head; An inner channel is fitted inside the channel, and an expansion cone head is connected to the bottom of the inner channel by a thread. Several expansion slits are opened on the surface of the expansion cone head, and an expansion head is connected to the bottom of the expansion cone head below the expansion slits. A rubber sleeve is fitted onto the outside of the expanding cone head at the bottom of the inner channel; A semi-circular handle is provided at the edge of the channel, and the outer diameter of the inner channel is smaller than the inner diameter of the channel; The handheld laser fixing mechanism includes a support barrel, a control display, a fixed bracket, a movable bracket, a laser hole, a laser light, a ball bearing, a ball spring, a limiting groove, a guide cap, and a ranging bracket; The fixed cap is clipped on the top of the support barrel. A control display is sleeved on the outside of the support barrel. A movable bracket is sleeved on the outside of the support barrel below the control display. A fixed bracket is sleeved on the outside of the support barrel below the movable bracket. A distance measuring bracket is connected in the middle of the movable bracket. Laser holes are provided at both ends of the fixed bracket, both ends of the movable bracket, and the bottom of the ranging bracket. Laser lights are embedded inside the laser holes, and the power supply of the laser lights is connected to the control display signal. One end of the movable bracket is connected to a ball spring, and the other end of the ball spring is connected to a ball, which is embedded inside the support barrel. A guide cap is connected to the bottom of the support barrel. The guide cap is connected to the inner channel by a thread. A through channel runs through the center of the support barrel and the inner channel. A limiting groove is opened on the surface of the support barrel at the top of the through channel.

2. The minimally invasive device for precisely placing channels and drainage tubes according to claim 1, characterized in that, The connecting mechanism includes a large U-shaped groove, a small U-shaped groove, a clamping ring center pin, a limiting post, a return spring, and a limiting groove; The large U-shaped groove is connected to a small U-shaped groove on the other side. The two large U-shaped grooves are connected to form a U-shaped clamp by a clamping ring center pin. A limit post is provided on the inner side of the small U-shaped groove. A reset spring is directly sleeved on the two limit posts. A limit groove is opened on the inner side of the large U-shaped groove. The large U-shaped groove is a four-fifths circular arc.

3. The minimally invasive device for precisely placing channels and drainage tubes according to claim 2, characterized in that, The small drainage mechanism includes a small drainage catheter, an insertion and removal steel needle, and a rounded tip of the steel needle; The small drainage catheter is fitted with an insertion and extraction steel needle, and the top of the insertion and extraction steel needle is provided with a rounded steel needle head. The outer diameter of the small drainage catheter is equal to the inner diameter of the through hole, and the length of the inserted and removed steel needle is greater than the length of the small drainage catheter.

4. The minimally invasive device for precisely placing channels and drainage tubes according to claim 3, characterized in that, The large drainage mechanism includes a large drainage catheter, a pressure needle, and a limiting head; The large drainage catheter is fitted with a pressing steel needle on its inner side, and a limit head is connected to the top of the pressing steel needle; The diameter of the limiting head is equal to the inner diameter of the limiting groove, and the lengths of the large drainage tube and the pressing steel needle are equal.

5. The minimally invasive device for precisely placing channels and drainage tubes according to claim 4, characterized in that, The fixed bracket, movable bracket, and range measuring bracket have different lengths; The control display is equipped with a screen, an on / off switch, and a reset switch.

6. The minimally invasive device for precisely placing channels and drainage tubes according to claim 1, characterized in that, The channel switching mechanism includes a channel support tube, a large channel, an extension tube, an expander, an air intake channel, an air storage bag, and an arc-shaped edge; An expander is sleeved on the outside of the channel support tube. An air intake channel is opened on the inner wall of the expander. The air intake channel is connected to the air storage bladder inside the expander. An arc-shaped edge is provided at the bottom of the air storage bladder. The inner diameter of the large channel is larger than the outer diameter of the channel, and the diameter of the channel support pipe is smaller than the inner diameter of the channel.

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