Visual tissue retraction guide system

Abstract

The utility model provides a visual tissue retracting and guiding system. The visual tissue retracting and guiding system comprises an endoscope, a dredging device and a reducing sleeve. The dredging device comprises a control handle provided with a handle inner cavity and an expansion bag, the control handle is connected with a tube body, an inner sleeve is arranged in an outer sleeve of the tube body in a penetrating mode, and the inner sleeve is communicated with the handle inner cavity. The control handle is provided with a filling connector communicated with an inner cavity of the collapsible bag and a suction connector communicated with an inner cavity of the handle. The reducing sleeve comprises a first half-cylinder structure and a second half-cylinder structure which are in sliding connection, and the dredging device can be arranged between the first half-cylinder structure and the second half-cylinder structure in a penetrating mode; the endoscope is arranged in the inner sleeve in a penetrating mode. According to the visual tissue retraction guide system provided by the invention, through the endoscope penetrating through the inner sleeve and the expansion bag at the far end of the dredging device, the brain tissue is flexibly and visually retracted, the white matter fiber of the brain is protected, and the condition of a target spot is observed in real time in the process of sucking extravasated blood and accumulated (spinal fluid) fluid; the variable-diameter sleeve can meet target spot displacement in an operation or operation needs to adjust an operation channel.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a visualized tissue retraction guidance system. Background Art

[0002] The clinical application and benefits of neuroendoscopy combined with guided catheter channel technology in the treatment of hypertensive cerebral hemorrhage have been widely applied and clinical research has been published in neurosurgery at home and abroad. In the article "Fully endoscopic freehand removal of spontaneous supratentorial intracerebral hematoma" published in World Neurosurgery in 2016, the surgeon was Professor Angileri from the Department of Neurosurgery at the University of Messina in Italy. He used neuroendoscopy combined with guided catheter channel technology in 6 cases of spontaneous supratentorial intracerebral hemorrhage and achieved ideal results. "Surgeons need dynamic operations at multiple angles during surgery to avoid damaging the brain parenchyma. This technology is better than stereotactic surgery in the operation of the hematoma cavity, including hemostasis and the degree of hematoma removal. The postoperative CT scan results showed that the patient's hematoma clearance rate was >90%, which confirmed the effectiveness of completely freehand endoscopic operation and improved the patient's prognosis. The complete freehand endoscopic combined with guided catheter channel technology is effective in removing supratentorial intracerebral hematoma and controlling intraoperative bleeding."

[0003] Improved existing endoscopic hematoma removal technology based on full endoscopic freehand operation. World Neurosurgery, 2016, 12 Liu Cegang, Zhu Mingfeng and others used neuroendoscopy combined with guide catheter channel technology in the surgical treatment of 23 patients with intraventricular hemorrhage and achieved ideal treatment results. The surgeon also emphasized in the discussion section of the article that "the use of tubular retractors as a support channel for the endoscope to enter the ventricle during surgery has shown that it is easier to remove hematomas, the field of vision is wider than that under simple endoscopy, and the observation of the ventricular wall is clearer, so the additional damage is lighter. The traditional tubular retractor is an elliptical tubular channel made of transparent material with a fixed diameter. The movement of the channel during surgery is likely to cause traction damage to brain tissue.

[0004] The minimally invasive surgical concept of neurosurgery has been unanimously recognized by experts and scholars at home and abroad, and the neuroendoscopic technology and guide catheter channel technology generated by this concept have been clinically practiced in minimally invasive surgical methods such as hypertensive cerebral hemorrhage and brain tumor resection. Efficient and convenient endoscope and channel technology will continue to be the future clinical development direction, bringing better treatment effects to more patients with cerebral hemorrhage and brain tumors, reducing the occurrence of postoperative complications and sequelae of patients, and improving the prognosis and quality of life of patients are the common expectations of doctors and patients.

[0005] Although the related technology can establish a surgical channel for the brain, its outer and inner sheaths are made of hard materials (generally transparent PC) and have a large interventional cross-section. When the brain tissue is retracted, it exerts great pressure on the brain tissue, which can easily cause damage to the brain tissue. While establishing the channel, the doctor cannot see the puncture process and the specific situation of the patient's intracranial hematoma. If there is congestion in the channel at this time, it cannot be cleaned in time. Therefore, there is an urgent need for a surgical device that can visualize and flexibly retract brain tissue to establish a surgical channel, a variable diameter surgical channel during surgery, and integrated suction. Utility Model Content

[0006] In view of this, the purpose of the present application is to provide a visualized tissue retraction guidance system.

[0007] Based on the above purpose, the present application provides a visualized tissue retraction guide system, including: a trachea, including a control handle; the proximal end of the control handle is connected to a positioning assembly, and the distal end is connected to a tube body; the control handle is provided with a handle inner cavity, the tube body includes an outer sleeve and an inner sleeve inserted in the outer sleeve, and the inner sleeve is communicated with the handle inner cavity; the trachea also includes an inflation sac, the inflation sac is respectively sealed and connected to the end of the outer sleeve away from the control handle and the end of the inner sleeve away from the control handle, the sac inner cavity of the inflation sac is communicated with the sleeve gap between the inner sleeve and the outer sleeve; the control handle is provided with a filling interface for connecting to a liquid supply device for the inflation sac, the inflation sac is connected to the inner sleeve of the outer sleeve, and the inflation sac is connected to the inner sleeve of the outer sleeve. The filling interface is communicated with the sleeve gap, and the sleeve gap is separated from the handle inner cavity; the control handle is also provided with a suction interface for connecting to a negative pressure device, and the suction interface is communicated with the handle inner cavity; an endoscope is inserted into the inner sleeve, the collection end of the endoscope is close to the inner sleeve and away from the tube opening of the control handle, the positioning assembly is sleeved on the outer circumference of the endoscope, and the positioning assembly is used to position the endoscope; a reducing sleeve includes a first half-cylinder structure and a second half-cylinder structure that are slidably connected, the second half-cylinder structure can slide relative to the first half-cylinder structure in a radial direction, and the outer sleeve of the through-hole can be inserted between the first half-cylinder structure and the first half-cylinder structure.

[0008] Optionally, one end of the inner sleeve away from the control handle extends out of the outer sleeve; the end of the expansion and contraction sac away from the control handle is provided with a cylindrical first extension portion extending toward the sac inner cavity, and the first extension portion is sleeved on the outer circumference of the inner sleeve; the end of the expansion and contraction sac close to the control handle is provided with a cylindrical second extension portion extending out of the expansion and contraction sac, and the second extension portion is sleeved on the outer circumference of the outer sleeve; the opening device includes a first developing ring for bundling the first extension portion, and a second developing ring for bundling the second extension portion.

[0009] Optionally, the outer sleeve is provided with a plurality of marking points at intervals along the axial direction.

[0010] Optionally, the handle inner cavity is provided with a first opening close to the distal end of the control handle, and a second opening close to the proximal end of the control handle, and the inner sleeve extends from the first opening to the second opening; a first sealing ring and a second sealing ring are provided in the handle inner cavity, the first sealing ring blocks the gap between the inner sleeve and the first opening, and the second sealing ring blocks the gap between the inner sleeve and the second opening.

[0011] Optionally, a spacer is provided between the first sealing ring and the second sealing ring, and two ends of the spacer are respectively abutted against the first sealing ring and the second sealing ring.

[0012] Optionally, the tube wall of the inner sleeve is provided with a connecting hole close to the suction interface, and the connecting hole connects the sleeve gap and the handle inner cavity; the control handle is also provided with a suction control hole connecting the handle inner cavity and the outside.

[0013] Optionally, the filling device further includes a first Luer connector and a suction connector, and a filling hose respectively connected to the first Luer connector and the suction connector, and the first Luer connector is connected to the filling interface.

[0014] Optionally, the positioning assembly includes a positioning column sleeved on the outer circumference of the inner sleeve, and at least two jaws are provided at one end of the positioning column away from the control handle, and the at least two jaws are spaced apart around the axis of the endoscope; the outer peripheral wall of the jaw is provided with a conical thread, and the positioning assembly also includes a locking nut cooperating with the jaw thread, and the locking nut is used to gather the at least two jaws.

[0015] Optionally, the first semi-cylinder structure includes a first arc-shaped clamping plate and a first end plate arranged at the end of the first arc-shaped clamping plate, and the second semi-cylinder structure includes a second arc-shaped clamping plate and a second end plate arranged at the end of the second arc-shaped clamping plate; the reducing sleeve also includes at least two flexible folding plates, each of the flexible folding plates is respectively connected to the first arc-shaped clamping plate and the second arc-shaped clamping plate, and the first arc-shaped clamping plate, the second arc-shaped clamping plate and the at least two flexible folding plates together form a cylindrical structure; the first end plate is provided with at least two positioning grooves at intervals along the sliding direction of the second semi-cylinder structure, and the second end plate is provided with a telescopic pin; the telescopic pin has an extended state of being inserted into the positioning groove, and a contracted state of being moved out of the positioning groove; when the telescopic pin is in the extended state, the first semi-cylinder structure and the second semi-cylinder structure are relatively fixed; when the telescopic pin is in the contracted state, the first semi-cylinder structure and the second semi-cylinder structure can slide relative to each other.

[0016] Optionally, the reducing sleeve also includes a one-way valve for connecting to a flushing liquid supply device, and a flushing hose connected to the one-way valve, wherein the flushing hose is positioned at the first end plate, and the liquid outlet of the flushing hose faces the interior of the cylindrical structure.

[0017] As can be seen from the above, the visual tissue retraction guidance system provided by the present application can greatly reduce the damage to the tender brain tissue during the process of retracting the brain tissue through the soft expansion and contraction capsule, which helps to protect the white matter fibers of the brain. The retracted brain tissue can be supported during the operation to form a surgical channel. Even if the channel-making device moves in the channel, it will not rub the brain tissue, and the size of the surgical channel can be adjusted in real time according to the needs of the operation, reducing the risk of damage to the brain tissue caused by frequent insertion and removal of the surgical sleeve during the operation due to adjustment of the surgical channel. Through the endoscope, the target situation can be observed in real time during the process of retracting the brain tissue and aspirating congestion and accumulation of (spinal fluid). The retractable sleeve can meet the target displacement or operation needs during the operation to adjust the surgical channel. The system greatly improves the surgical effect, reduces postoperative complications and the difficulty of surgical operation, and improves the convenience of clinical use and surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of a first three-dimensional direction of a visualized tissue retraction guiding system according to an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a second three-dimensional direction of the visualized tissue retraction guiding system according to an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a third three-dimensional direction of the visualized tissue retraction guiding system according to an embodiment of the present application;

[0022] Figures 4a to 4e A schematic diagram of the use process of the visual tissue retraction guiding system according to an embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of a main view of a visual tissue retraction guiding system according to an embodiment of the present application;

[0024] Figure 6 A schematic cross-sectional view of a first direction of a visualized tissue retraction guiding system according to an embodiment of the present application;

[0025] Figure 7 A schematic cross-sectional view of the second direction of the visualized tissue retraction guiding system according to an embodiment of the present application;

[0026] Figure 8 for Figure 7 A magnified schematic diagram of part A;

[0027] Fig. 9 for Figure 6 A local enlarged schematic diagram in FIG.

[0028] Fig.10 A schematic diagram of a fourth three-dimensional direction of the visualized tissue retraction guiding system according to an embodiment of the present application;

[0029] Fig.11a A three-dimensional schematic diagram of a suction control hole of a visualized tissue retraction guide system according to an embodiment of the present application;

[0030] Fig.11b A schematic cross-sectional view of a suction control hole of a visualized tissue retraction guide system according to an embodiment of the present application;

[0031] Fig.11c It is a cross-sectional schematic diagram of a part of the suction control hole of the visualized tissue retraction guide system of the embodiment of the present application being covered and blocked;

[0032] Fig.12 It is a schematic diagram of a first three-dimensional direction of a reducing sleeve of a visualized tissue retraction guiding system according to an embodiment of the present application;

[0033] Fig.13 It is a schematic diagram of a second three-dimensional direction of a reducing sleeve of a visualized tissue retraction guiding system according to an embodiment of the present application;

[0034] Fig.14 This is a schematic diagram of a main view of a variable diameter sleeve of a visualized tissue retraction guiding system according to an embodiment of the present application when the outer diameter is small;

[0035] Fig.15 This is a schematic diagram of a main view of a variable diameter sleeve of a visualized tissue retraction guiding system according to an embodiment of the present application when the outer diameter is large;

[0036] Fig.16 It is a top view schematic diagram of the variable diameter sleeve of the visualized tissue retraction guiding system of the embodiment of the present application when the outer diameter is relatively small;

[0037] Fig.17 This is a top view schematic diagram of the reducing sleeve of the visualized tissue retraction guiding system according to an embodiment of the present application when the outer diameter is larger.

[0038] Description of reference numerals:

[0039] 100. Make a communication device;

[0040] 10. Control handle; 101. Proximal end; 102. Distal end; 103. Inner cavity of handle; 1031. First opening; 1032. Second opening; 104. Filling interface; 105. Suction interface; 106. First sealing ring; 107. Second sealing ring; 108. Spacer; 109. Suction control hole; 1010. Threaded plug; 1011. Strain relief sleeve;

[0041] 20, positioning assembly; 201, positioning column; 2011, clamping claw; 202, locking nut;

[0042] 30, tube body; 301, outer sleeve; 302, inner sleeve; 303, connecting hole;

[0043] 40. Identification point;

[0044] 50, expansion and contraction capsule; 501, capsule cavity; 502, first extension portion; 503, second extension portion;

[0045] 60, sleeve gap; 70, first developing ring; 80, second developing ring; 90, first Luer connector; 91, suction connector; 93, filling hose;

[0046] 200, endoscope; 210, collection end;

[0047] 300, reducing sleeve;

[0048] 310, first half-tube structure; 3101, first arc-shaped clamping plate; 3102, first end plate; 3103, positioning groove; 3104, extension plate;

[0049] 320, second half-tube structure; 3201, second arc-shaped clamping plate; 3202, second end plate; 3203, telescopic pin; 3204, fixed protrusion; 3205, movable protrusion; 3206, spring;

[0050] 330, flexible flap; 340, one-way valve; 350, flushing hose;

[0051] 400. Flushing and liquid supply equipment; 500. Inflation and contraction bladder liquid supply equipment; 600. Negative pressure equipment. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0053] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0054] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0055] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0056] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0057] like Figures 1 to 9 As shown, the embodiment of the present application provides a visualized tissue retraction guide system, including: a venting device 100, including a control handle 10; the proximal end 101 of the control handle 10 is connected to a positioning assembly 20, and the distal end 102 is connected to a tube body 30; the control handle 10 is provided with a handle inner cavity 103, the tube body 30 includes an outer sleeve 301 and an inner sleeve 302 inserted in the outer sleeve 301, and the inner sleeve 302 is communicated with the handle inner cavity 103; the venting device 100 also includes an inflation capsule 50, the inflation capsule 50 is respectively sealed and connected to the end of the outer sleeve 301 away from the control handle 10 (hereinafter referred to as the outer sleeve distal end) and the end of the inner sleeve 302 away from the control handle 10 (hereinafter referred to as the inner sleeve distal end), and the capsule inner cavity 501 of the inflation capsule 50 is communicated with the sleeve gap 60 between the inner sleeve 302 and the outer sleeve 301; the control handle 10 is provided with a filling interface 104 for connecting to the inflation capsule liquid supply device 500, as shown in FIG. Figure 3 The filling interface 104 is connected to the sleeve gap 60, and the sleeve gap 60 is separated from the handle inner cavity 103; the control handle 10 is also provided with a suction interface 105 for connecting to the negative pressure device 600, such as Figure 2, the suction interface 105 is connected to the handle cavity 103; the endoscope 200 is inserted into the inner sleeve 302, the collection end 210 of the endoscope 200 is close to the inner sleeve 302 and away from the tube mouth of the control handle 10, the positioning component 20 is sleeved on the outer periphery of the endoscope 200, and the positioning component 20 is used to position the endoscope 200; the reducing sleeve 300 includes a first half-cylinder structure 310 and a second half-cylinder structure 320 that are slidably connected, the second half-cylinder structure 320 can slide relative to the first half-cylinder structure 310 in the radial direction, and the outer sleeve 301 of the through-hole 100 can be inserted between the first half-cylinder structure 310 and the first half-cylinder structure 310.

[0058] Exemplarily, the end of the outer sleeve 301 close to the control handle 10 (hereinafter referred to as the proximal end of the outer sleeve) is connected to the control handle 10 through a strain relief sleeve 1011 .

[0059] Exemplarily, both the suction port 105 and the filling port 104 are tube structures protruding from the control handle 10 .

[0060] Exemplarily, the negative pressure device 600 may be a negative pressure suction instrument. The inflation bladder liquid supply device 500 may be a device capable of providing pressurized liquid or pressurized gas to the inflation bladder 50, for example, a syringe filled with a certain volume.

[0061] Before the operation, the position of the endoscope 200 in the inner cannula 302 is adjusted until the collection end 210 of the endoscope 200 is close to the distal end of the inner cannula in the inner cannula 302, or the collection end 210 extends out of the distal end of the inner cannula. After that, the endoscope 200 is fixed by the positioning assembly 20 so that the position between the endoscope 200 and the positioning assembly 20 is relatively fixed. The suction interface 105 is connected to the negative pressure device 600, and the inflation and deflation bag liquid supply device 500 is connected to the filling interface 104.

[0062] During surgery, the reducing sleeve 300 is located between the expansion and contraction capsule 50 and the control handle 10. Figure 4a The expansion and contraction capsule liquid supply device 500 is controlled to inject the fluid medium into the opening 104 of the opening 104, and the fluid medium enters the expansion and contraction capsule 50 through the sleeve gap 60, so that the outer diameter of the expansion and contraction capsule 50 gradually expands to an ellipsoidal or spherical shape, such as Figure 4b. The surgical operator holds the control handle 10 and applies force to the distal end to retract the brain tissue through the expansion capsule 50; during this process, the image collected by the acquisition end 210 of the endoscope 200 can be displayed on the screen in the operating room, so that the surgical operator can observe the brain tissue in real time. Since the expansion capsule 50 is made of a soft material, it can greatly reduce the damage to the tender brain tissue. While retracting the brain tissue, the expansion capsule 50 is pushed forward to form a channel. At the same time, the reducing sleeve 300 is pushed into the formed channel. When the reducing sleeve 300 is about to contact the brain tissue, the second half-cylinder structure 320 is slid away from the first half-cylinder structure 310 to increase the outer diameter of the reducing sleeve 300 (at least the size along the sliding direction of the second half-cylinder structure 320). Figure 4c Afterwards, the reduced diameter sleeve 300 after adjustment is fixed on the fixing device of the operating table. The reduced diameter sleeve 300 with an enlarged outer diameter can support the retracted brain tissue so that the formed channel can be maintained.

[0063] After the channel is formed, the expansion and contraction capsule liquid supply device 500 is controlled to suck the flow medium in the expansion and contraction capsule 50, so that the expansion and contraction capsule 50 shrinks, providing a movable space for the distal end 102 of the venting device 100. After the outer diameter of the expansion and contraction capsule 50 shrinks to a preset size, the surgical operator moves the distal end of the inner sleeve of the venting device 100 to the blood congestion position through the real-time image displayed on the display screen. The negative pressure device 600 is started, and the vacuum suction generated by the negative pressure device 600 can suck the blood congestion into the inner sleeve 302, and the blood congestion enters the handle cavity 103 through the inner sleeve 302 and is sucked out of the venting device 100 through the suction interface 105.

[0064] After the surgical operator observes through the display screen that the blood clots have been cleared, the blood clot 100 is pulled out of the channel. Figure 4d After that, the reducing sleeve 300 with a larger outer diameter still supports the channel between the brain tissues. Figure 4e .

[0065] The visualized tissue retraction guidance system provided in the embodiment of the present application can greatly reduce the damage to the tender brain tissue during the process of retracting the brain tissue through the soft expansion and contraction capsule 50, which helps to protect the white matter fibers of the brain. The reducing sleeve 300 can support the retracted brain tissue during the operation to form a surgical channel. Even if the channel 100 moves in the channel, it will not rub the brain tissue, and the size of the surgical channel can be adjusted in real time according to the needs of the operation, reducing the risk of damage to the brain tissue caused by frequent insertion and removal of the surgical sleeve during the operation due to adjustment of the surgical channel. The endoscope 200 can be used to observe the target situation in real time during the process of retracting the brain tissue and aspirating congestion and accumulation of (spinal fluid). The reducing sleeve can adjust the surgical channel to meet the needs of target displacement or operation during the operation. The system greatly improves the surgical effect, reduces postoperative complications and the difficulty of surgical operation, and improves the convenience of clinical use and surgical efficiency.

[0066] like Figure 7 and Figure 8 As shown, in some embodiments, one end of the inner sleeve 302 away from the control handle 10 extends out of the outer sleeve 301; the end of the expansion capsule 50 away from the control handle 10 (hereinafter referred to as the expansion capsule distal end) is provided with a cylindrical first extension portion 502 extending toward the capsule inner cavity 501, and the first extension portion 502 is sleeved on the outer periphery of the inner sleeve 302; the end of the expansion capsule 50 close to the control handle 10 (hereinafter referred to as the expansion capsule proximal end) is provided with a cylindrical second extension portion 503 extending out of the expansion capsule 50, and the second extension portion 503 is sleeved on the outer periphery of the outer sleeve 301; the through-hole 100 includes a first developing ring 70 for bundling the first extension portion 502, and a second developing ring 80 for bundling the second extension portion 503.

[0067] The first extension part 502 is sleeved on the outer circumference of the distal end of the inner sleeve, and the first developing ring 70 forces the first extension part 502 to hug the inner sleeve 302 from the outer circumference of the first extension part 502, so as to achieve a sealed connection between the expansion and contraction capsule 50 and the inner sleeve 302. Similarly, the second extension part 503 is sleeved on the outer circumference of the distal end of the outer sleeve, and the second developing ring 80 forces the second extension part 503 to hug the outer sleeve 301 from the outer circumference of the second extension part 503, so as to achieve a sealed connection between the expansion and contraction capsule 50 and the outer sleeve 301.

[0068] In addition to the above-mentioned function of fixing the inflatable capsule 50 , the first developing ring 70 and the second developing ring 80 also have the function of facilitating navigation and positioning of the CT device during surgery, so that the surgical operator can know the position of the inflatable capsule 50 in the patient's body.

[0069] like Figure 5 As shown, in some embodiments, the outer sleeve 301 is provided with a plurality of marking points 40 spaced apart along the axial direction.

[0070] Exemplarily, a plurality of marking points 40 are evenly arranged on the outer sleeve 301 .

[0071] Exemplarily, the marking point 40 may be a dot pattern, a strip pattern, or a ring pattern arranged on the outer peripheral wall of the outer sleeve 301 .

[0072] The marking point 40 can be used as a size mark. The surgical operator can determine the depth to which the expansion and contraction capsule 50 enters the brain tissue during the process of pushing the brain device 100 by observing the marking point 40 .

[0073] like Figure 6 and Fig. 9 As shown, in some embodiments, the handle inner cavity 103 is provided with a first opening 1031 near the distal end 102 of the control handle 10, and a second opening 1032 near the proximal end 101 of the control handle 10, and the inner sleeve 302 extends from the first opening 1031 to the second opening 1032; a first sealing ring 106 and a second sealing ring 107 are provided in the handle inner cavity 103, the first sealing ring 106 blocks the gap between the inner sleeve 302 and the first opening 1031, and the second sealing ring 107 blocks the gap between the inner sleeve 302 and the second opening 1032.

[0074] Exemplarily, the handle inner cavity 103 is provided with an internal threaded opening extending to the proximal end 101 of the control handle 10 , the internal threaded opening is connected to a threaded plug 1010 , and the second opening 1032 is provided at the threaded plug 1010 and extends axially through the threaded plug 1010 .

[0075] Exemplarily, the first opening 1031 axially penetrates to the distal end 102 of the control handle 10 , the proximal end of the outer sleeve is inserted into the first opening 1031 , and the filling port 104 is disposed between the proximal end of the outer sleeve and the handle inner cavity 103 .

[0076] The first sealing ring 106 and the second sealing ring 107 are both sleeved on the portion of the inner sleeve 302 located in the handle inner cavity 103. The first sealing ring 106 and the second sealing ring 107 respectively block the first opening 1031 and the second opening 1032 to seal both ends of the handle inner cavity 103. On the one hand, the fluid medium used to fill the expansion and contraction bag 50 that enters the sleeve gap 60 can be prevented from entering the handle inner cavity 103. On the other hand, after the negative pressure device 600 is started, the handle inner cavity 103 can have a vacuum suction force that meets the requirements of aspirating blood stasis.

[0077] like Figure 6 and Fig. 9 As shown, in some embodiments, a spacer sleeve 108 is provided between the first sealing ring 106 and the second sealing ring 107 , and two ends of the spacer sleeve 108 abut against the first sealing ring 106 and the second sealing ring 107 , respectively.

[0078] The spacer 108 is also mounted on the portion of the inner sleeve 302 located in the handle inner cavity 103. The spacer 108 can generate axial thrust to the first sealing ring 106 and the second sealing ring 107 through its two ends, so that the first sealing ring 106 can fit tightly with the first opening 1031, and the second sealing ring 107 can fit tightly with the second opening 1032, which helps to keep the two ends of the handle inner cavity 103 in a sealed state.

[0079] like Fig. 9 , Fig.10 and Fig.11a As shown, in some embodiments, the tube wall of the inner sleeve 302 is provided with a connecting hole 303 close to the suction interface 105, and the connecting hole 303 connects the interior of the inner sleeve 302 and the handle cavity 103; the control handle 10 is also provided with a suction control hole 109 connecting the handle cavity 103 and the outside.

[0080] Exemplarily, at least two communicating holes 303 are provided, and the at least two communicating holes 303 are spaced apart and distributed along the axial direction of the inner sleeve 302, such as Fig. 9 .

[0081] like Fig.11a and Fig.11b , exemplarily, the radial cross-section of the suction control hole 109 may be pear-shaped.

[0082] Exemplarily, the spacer sleeve 108 is provided with a hollow portion, the position of which corresponds to the position of the connecting hole 303 , so as to prevent the spacer sleeve 108 from blocking the connecting hole 303 from communicating with the handle inner cavity 103 .

[0083] Exemplarily, the suction control hole 109 is disposed near the suction interface 105 .

[0084] The blood stagnation is sucked into the inner sleeve 302 from the distal end of the inner sleeve and moves toward the control handle 10. After entering the control handle 10, the blood stagnation inside the inner sleeve 302 flows out of the inner sleeve 302 through the connecting hole 303, passes through the hollow part of the spacer 108 and enters the handle inner cavity 103, and finally is discharged from the vent 100 through the suction interface 105.

[0085] When the negative pressure device 600 is turned on, the air in the handle cavity 103 will be sucked to create an atmospheric pressure difference between the handle cavity 103 and the outside world; and the outside air will enter the handle cavity 103 through the suction control hole 109 for replenishment to reduce the atmospheric pressure difference between the handle cavity 103 and the outside world.

[0086] When a greater vacuum suction force is required in the inner sleeve 302, the surgical operator can cover and block a portion of the suction control hole 109 with his fingers, such as Fig.11c As shown ( Fig.11cThe black part in the middle is the part of the suction control hole 109 that is covered and blocked by the finger). At this time, the connection area of ​​the suction control hole 109 is reduced, and the flow rate of external air entering the handle cavity 103 is also reduced accordingly. There is a large atmospheric pressure difference between the handle cavity 103 and the outside world, and the inner sleeve 302 has a large vacuum suction force.

[0087] When it is necessary to reduce the vacuum suction in the inner sleeve 302, the surgical operator can reduce the area of ​​the blocked suction control hole 109 to increase the flow of external air into the handle cavity 103 and reduce the atmospheric pressure difference between the handle cavity 103 and the outside world. The vacuum suction generated by the handle cavity 103 on the inner sleeve 302 will be reduced accordingly.

[0088] In summary, the surgical operator can manually control the covered and blocked area of ​​the suction control hole 109, and flexibly and conveniently adjust the vacuum suction of the inner sleeve 302. While thoroughly clearing the blood stasis, it can also ensure that the tender brain tissue will not be damaged by the large vacuum suction.

[0089] like Figure 5 and Figure 7 As shown, in some embodiments, the filling device 100 also includes a first Luer connector 90 and a suction connector 91, and a filling hose 92 connected to the first Luer connector 90 and the suction connector 91 respectively, and the first Luer connector 90 is connected to the filling interface 104.

[0090] The suction connector 91 is connected to the inflation and deflation bladder liquid supply device 500 .

[0091] The Luer connector is a standardized micro-infiltration connector. The fluid medium provided by the inflation capsule liquid supply device 500 passes through the suction connector 91, the filling hose 92 and the first Luer connector 90 in sequence before entering the filling port 104. In this process, leakage of the fluid medium can be avoided, which helps the surgical operator to more accurately control the expansion size of the inflation capsule 50 and avoid damage to the brain tissue caused by excessive expansion of the outer diameter of the inflation capsule 50.

[0092] like Figure 5 and Fig. 9 As shown, in some embodiments, the positioning assembly 20 includes a positioning column 201 that is sleeved on the outer periphery of the inner sleeve 302, and at least two clamping jaws 2011 are provided at one end of the positioning column 201 away from the control handle 10, and the at least two clamping jaws 2011 are spaced apart around the axis of the endoscope 200; the outer peripheral wall of the clamping jaw 2011 is provided with a tapered thread, and the positioning assembly 20 also includes a locking nut 202 that cooperates with the thread of the clamping jaw 2011, and the locking nut 202 is used to gather at least two clamping jaws 2011.

[0093] Exemplarily, the positioning column 201 may be engaged with the control handle 10 via a claw.

[0094] Exemplarily, the positioning column 201 may abut against the proximal end 101 of the control handle 10 , or be spaced apart from the proximal end 101 of the control handle 10 .

[0095] Exemplarily, at least two clamping jaws 2011 are evenly arranged around the axis of the endoscope 200 .

[0096] Take the positioning column 201 with two clamping jaws 2011 as an example, and the endoscope 200 is inserted between the two clamping jaws 2011. Move the endoscope 200 axially until the collection end 210 of the endoscope 200 moves to the specified position. Then, tighten the locking nut 202. Since the outer peripheral wall of the clamping jaws 2011 is provided with a tapered thread, when the locking nut 202 is tightened, all the clamping jaws 2011 will be forced to bend toward the endoscope 200 to clamp the endoscope 200, thereby achieving a relatively fixed position between the positioning component 20 and the endoscope 200, playing a role in fixing the endoscope 200 and preventing the endoscope 200 from shaking.

[0097] like Figures 12 to 17 As shown, in some embodiments, the first half-cylinder structure 310 includes a first arc-shaped clamping plate 3101 and a first end plate 3102 arranged at the end of the first arc-shaped clamping plate 3101, and the second half-cylinder structure 320 includes a second arc-shaped clamping plate 3201 and a second end plate 3202 arranged at the end of the second arc-shaped clamping plate 3201; the reducing sleeve 300 also includes at least two flexible folding plates 330, each of which is connected to the first arc-shaped clamping plate 3101 and the second arc-shaped clamping plate 3201, respectively. The first arc-shaped clamping plate 3101, the second arc-shaped clamping plate 3201 and the at least two flexible folding plates 330 are surrounded to form a cylindrical structure; the first end plate 3102 is provided with at least two positioning grooves 3103 at intervals along the sliding direction of the second semi-cylinder structure 320, and the second end plate 3202 is provided with a telescopic pin 3203; the telescopic pin 3203 has an extended state of being inserted into the positioning groove 3103, and a contracted state of being moved out of the positioning groove 3103; when the telescopic pin 3203 is in the extended state, the first semi-cylinder structure 310 and the second semi-cylinder structure 320 are relatively fixed; when the telescopic pin 3203 is in the contracted state, the first semi-cylinder structure 310 and the second semi-cylinder structure 320 can slide relative to each other.

[0098] Exemplarily, the first end plate 3102 and the second end plate 3202 may be spliced ​​into a circular plate-shaped structure.

[0099] Exemplarily, the first end plate 3102 may be a C-shaped plate structure.

[0100] Exemplarily, when the second arc-shaped clamping plate 3201 is close to the first arc-shaped clamping plate 3101, the flexible flap 330 can be folded according to the memory shape.

[0101] The example of the variable diameter sleeve 300 including two flexible flaps 330 is used for explanation. The two flexible flaps 330 are arranged opposite to each other. When the second arc-shaped clamping plate 3201 is close to the first arc-shaped clamping plate 3101, the flexible flaps 330 are contracted. Fig.14 When the second arc-shaped splint 3201 is away from the first arc-shaped splint 3101, the flexible flap 330 stretches, such as Fig.15 , so that the first arc-shaped clamping plate 3101, the second arc-shaped clamping plate 3201 and the two flexible folding pieces 330 are always surrounded to form a circumferentially continuous cylindrical structure.

[0102] For example, Fig.12 and Fig.13 The second end plate 3202 is provided with a fixed protrusion 3204, the telescopic pin 3203 is provided with a movable protrusion 3205, and a spring 3206 is provided between the fixed protrusion 3204 and the movable protrusion 3205. When an external force drives the movable protrusion 3205 and the telescopic pin 3203 to move toward the fixed protrusion 3204, the telescopic pin 3203 is in a contracted state; when the external force is eliminated, the spring 3206 pushes the telescopic pin 3203 and the movable protrusion 3205 away from the fixed protrusion 3204, and the telescopic pin 3203 returns to an extended state. The surgical operator can switch the state of the telescopic pin 3203 by squeezing the fixed protrusion 3204 and the movable protrusion 3205 with two fingers, which is convenient to operate.

[0103] When the outer diameter of the reducing sleeve 300 needs to be enlarged, the telescopic pin 3203 is retracted, and the second half-cylinder structure 320 is slid to slide the second end plate 3202 in a direction away from the first end plate 3102. Fig.16 and Fig.17 When the second end plate 3202 moves to the designated position, the telescopic pin 3203 switches to the extended state, the first half-barrel structure 310 and the second half-barrel structure 320 are relatively fixed, and the outer diameter of the reducing sleeve 300 remains large. When the outer diameter of the reducing sleeve 300 needs to be reduced, except that the sliding direction of the second half-barrel structure 320 is opposite, the remaining operations are the same as above, and will not be repeated here.

[0104] The outer diameter of the reducing sleeve 300 can be adjusted by moving the second half-cylinder structure 320, which is easy to operate. At the same time, the positions of the second half-cylinder structure 320 and the first half-cylinder structure 310 can be relatively fixed by the telescopic pin 3203, so that the reducing sleeve 300 can reliably maintain the outer diameter after adjustment, which helps to reduce surgical risks.

[0105] like Figure 2 , Figures 12 to 16As shown, in some embodiments, the reducing sleeve 300 also includes a one-way valve 340 for connecting to the flushing liquid supply device 400, and a flushing hose 350 connected to the one-way valve 340, the flushing hose 350 is positioned on the first end plate 3102, and the liquid outlet of the flushing hose 350 faces the interior of the cylindrical structure.

[0106] Illustratively, the flushing liquid supply device 400 may be a syringe filled with flushing liquid.

[0107] Exemplarily, the first end plate 3102 is further provided with an extension plate 3104 extending radially thereof, and the extension plate 3104 is provided with a groove for positioning the flushing hose 350 , which extends from one end of the extension plate 3104 away from the first end plate 3102 to the inner wall of the first end plate 3102 .

[0108] When the collecting end 210 of the endoscope 200 is stained with blood or blood stains, flushing liquid can be injected into the one-way valve 340 through the flushing liquid supply device 400. The flushing liquid enters the tubular structure through the flushing hose 350 to flush the collecting end 210 that is between the first arc-shaped clamping plate 3101 and the second arc-shaped clamping plate 3201 and extends out of the inner sleeve 302.

[0109] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0110] The various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0111] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present application, and to enable those of ordinary skill in the art to understand the present application and thus design various embodiments with various modifications suitable for specific purposes.

[0112] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0113] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0114] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A visual tissue retraction guidance system, characterized in that: include: A ventilator, comprising a control handle; a positioning assembly is connected to the proximal end of the control handle, and a tube body is connected to the distal end; the control handle is provided with a handle inner cavity, the tube body comprises an outer sleeve and an inner sleeve inserted in the outer sleeve, the inner sleeve is communicated with the handle inner cavity; the ventilator also comprises an inflation sac, the inflation sac is respectively sealed and connected to the end of the outer sleeve away from the control handle and the end of the inner sleeve away from the control handle, the sac inner cavity of the inflation sac is communicated with the sleeve gap between the inner sleeve and the outer sleeve; the control handle is provided with a filling interface for connecting to an inflation sac liquid supply device, the filling interface is communicated with the sleeve gap, and the sleeve gap is separated from the handle inner cavity; the control handle is also provided with a suction interface for connecting to a negative pressure device, the suction interface is communicated with the handle inner cavity; An endoscope is inserted into the inner sleeve, the collection end of the endoscope is close to the tube opening of the inner sleeve and away from the control handle, the positioning component is sleeved on the outer periphery of the endoscope, and the positioning component is used to position the endoscope; The reducing sleeve comprises a first half-cylinder structure and a second half-cylinder structure which are slidably connected. The second half-cylinder structure can slide relative to the first half-cylinder structure in the radial direction. The outer sleeve of the through-hole can be inserted between the first half-cylinder structure and the second half-cylinder structure.

2. The visualized tissue retraction guiding system according to claim 1, characterized in that: The end of the inner sleeve away from the control handle extends out of the outer sleeve; the end of the inflatable bag away from the control handle is provided with a cylindrical first extension portion extending toward the inner cavity of the bag, and the first extension portion is sleeved on the outer periphery of the inner sleeve; the end of the inflatable bag close to the control handle is provided with a cylindrical second extension portion extending toward the outside of the inflatable bag, and the second extension portion is sleeved on the outer periphery of the outer sleeve; The through-hole forming device includes a first developing ring for bundling the first extension part, and a second developing ring for bundling the second extension part.

3. The visualized tissue retraction guiding system according to claim 1, characterized in that: The outer sleeve is provided with a plurality of marking points at intervals along the axial direction.

4. The visualized tissue retraction guiding system according to claim 1, characterized in that: The handle inner cavity is provided with a first opening close to the distal end of the control handle, and a second opening close to the proximal end of the control handle, and the inner sleeve extends from the first opening to the second opening; the handle inner cavity is provided with a first sealing ring and a second sealing ring, the first sealing ring blocks the gap between the inner sleeve and the first opening, and the second sealing ring blocks the gap between the inner sleeve and the second opening.

5. The visualized tissue retraction guiding system according to claim 4, characterized in that: A spacer is provided between the first sealing ring and the second sealing ring, and two ends of the spacer are respectively in contact with the first sealing ring and the second sealing ring.

6. The visualized tissue retraction guiding system according to claim 1, characterized in that: The tube wall of the inner sleeve is provided with a connecting hole close to the suction interface, and the connecting hole connects the sleeve gap and the inner cavity of the handle; the control handle is also provided with a suction control hole connecting the inner cavity of the handle and the outside.

7. The visualized tissue retraction guiding system according to claim 1, characterized in that: The filling device also includes a first Luer connector and a suction connector, and a filling hose connected to the first Luer connector and the suction connector respectively, and the first Luer connector is connected to the filling interface.

8. The visualized tissue retraction guiding system according to claim 1, characterized in that: The positioning assembly includes a positioning column sleeved on the outer circumference of the inner sleeve, and at least two clamping jaws are arranged at one end of the positioning column away from the control handle, and the at least two clamping jaws are arranged at intervals around the axis of the endoscope; the outer peripheral wall of the clamping jaw is provided with a tapered thread, and the positioning assembly also includes a locking nut matched with the clamping jaw thread, and the locking nut is used to gather the at least two clamping jaws.

9. The visualized tissue retraction guiding system according to claim 1, characterized in that: The first half-cylinder structure includes a first arc-shaped clamping plate and a first end plate arranged at the end of the first arc-shaped clamping plate, and the second half-cylinder structure includes a second arc-shaped clamping plate and a second end plate arranged at the end of the second arc-shaped clamping plate; the reducing sleeve also includes at least two flexible folding pieces, each of which is connected to the first arc-shaped clamping plate and the second arc-shaped clamping plate respectively, and the first arc-shaped clamping plate, the second arc-shaped clamping plate and the at least two flexible folding pieces together form a cylindrical structure; The first end plate is provided with at least two positioning grooves at intervals along the sliding direction of the second half-cylinder structure, and the second end plate is provided with a telescopic pin; the telescopic pin has an extended state of being inserted into the positioning groove, and a contracted state of being moved out of the positioning groove; when the telescopic pin is in the extended state, the first half-cylinder structure and the second half-cylinder structure are relatively fixed; when the telescopic pin is in the contracted state, the first half-cylinder structure and the second half-cylinder structure can slide relative to each other.

10. The visualized tissue retraction guiding system according to claim 9, characterized in that: The reducing sleeve also includes a one-way valve for connecting to a flushing liquid supply device, and a flushing hose connected to the one-way valve. The flushing hose is positioned at the first end plate, and the liquid outlet of the flushing hose faces the interior of the cylindrical structure.

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