Intracranial blood vessel opening occlusion device

Abstract

The present invention discloses an intracranial vascular opening blocking device, which belongs to the field of medical device technology, and includes a housing, a delivery tube connected to the housing, a positioning guide wire arranged in the delivery tube for positioning the blocking point, and a blocking material arranged in the delivery tube for blood vessel blocking; a first driving mechanism connected to the positioning guide wire for driving the positioning guide wire to pop out to the blocking point is arranged in the housing, a withdrawal indicating mechanism connected to the positioning guide wire for prompting withdrawal, a second driving mechanism connected to the first driving mechanism for driving the positioning guide wire and the delivery tube to withdraw and release the blocking material, and an arterial puncture indicating mechanism connected to the delivery tube for prompting pulsating blood flow changes. The present invention has a simple structure, a scientific and reasonable design, and is easy to use. It is sequentially introduced by an arterial sheath tube, detects and locates the blocking site, and releases the blocking material, thereby quickly and effectively realizing the blocking of the intracranial vascular opening, and is quick to operate and stable to use.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to an intracranial blood vessel opening and blocking device. Background Art

[0002] Intracranial aneurysms are mostly abnormal bulges on the walls of intracranial arteries. They are the leading cause of subarachnoid hemorrhage and the third most common cause of cerebrovascular accidents, after cerebral thrombosis and hypertensive cerebral hemorrhage. They can occur at any age, but are more common in middle-aged and elderly women between 40 and 60 years old. Currently, most scholars believe that intracranial aneurysms are caused by local congenital defects in the walls of intracranial arteries and increased intracavitary pressure. Hypertension, cerebral arteriosclerosis, and vasculitis are related to the occurrence and development of aneurysms.

[0003] Usually, patients with intracranial aneurysms can be treated by craniotomy, aneurysm clipping or intracranial aneurysm interventional embolization. With the continuous advancement and maturity of technology, most of the interventional embolization methods for intracranial aneurysms can achieve good treatment results. Through interventional surgery, coils are inserted into the aneurysm, making the inside of the aneurysm a dead space, and the aneurysm wall gradually becomes ischemic and necrotic, thereby effectively eliminating the existence of the aneurysm.

[0004] Femoral artery puncture is one of the common ways of interventional diagnosis and treatment. There are several methods for hemostasis at the puncture point after femoral artery intervention: manual compression hemostasis, mechanical compression hemostasis, vascular closure device hemostasis, etc. The traditional manual compression method has been used clinically for a long time, but long-term compression hemostasis and bed rest not only increase the workload of medical staff, but also increase the pain of patients. Among them, the vascular closure device releases a plugging material that can be absorbed by the human body outside the arterial wall at the femoral artery opening point. While the plugging material expands while absorbing blood, its mesh structure can promote the aggregation of platelets and red blood cells to achieve the purpose of hemostasis. At present, most of the plugging materials are polyethylene glycol, polyglycolide, polylactide, chitosan and collagen, which can be naturally degraded into water and carbon dioxide in the human body. Most of them are absorbed within 30 days and completely degraded within 60-90 days.

[0005] Currently, there are very few vascular opening occlusion devices on the market, which are extremely limited and cannot meet the needs of intracranial vascular interventional treatment. Therefore, creating a more efficient, stable and suitable vascular opening occlusion device has become a technical problem that needs to be solved urgently by technicians in the relevant technical field.

[0006] Therefore, the present invention provides an intracranial vascular opening blocking device to at least solve some of the above-mentioned technical problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an intracranial blood vessel opening blocking device to at least solve part of the above-mentioned technical problems.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0009] An intracranial vascular opening blocking device comprises a shell, a delivery tube connected to the shell, a positioning guide wire arranged in the delivery tube for positioning a blocking point, and a blocking material arranged in the delivery tube for blood vessel blocking; the shell is provided with a first driving mechanism connected to the positioning guide wire for driving the positioning guide wire to pop out to the blocking point, a withdrawal indicating mechanism connected to the positioning guide wire for prompting withdrawal, a second driving mechanism connected to the first driving mechanism for driving the positioning guide wire and the delivery tube to withdraw and release the blocking material, and an arterial puncture indicating mechanism connected to the delivery tube for prompting pulsating blood flow changes.

[0010] Furthermore, the first driving mechanism includes a pushing head arranged outside the shell, a pushing rod arranged inside the shell and connected to the pushing head, a first transmission plate connected to the pushing rod, a fixed plate arranged inside the shell, and a second transmission plate arranged on the fixed plate and connected to the first transmission plate, and the second transmission plate is fixedly connected to the positioning guide wire.

[0011] Furthermore, the fixed plate is a channel steel structure, a mounting groove is provided on the side wall of the fixed plate, the second transmission plate is movably arranged in the mounting groove, a rotating shaft is provided between the top wall and the bottom wall of the fixed plate, and a rotating gear is provided on the rotating shaft;

[0012] A first connecting plate is vertically arranged on the first transmission plate, a first rack matched with the rotating gear is arranged on the first connecting plate, a second rack matched with the rotating gear is arranged on the second transmission plate, and the rotating gear is respectively meshed with the first rack and the second rack.

[0013] Furthermore, the arterial puncture indicating mechanism comprises a return blood vessel arranged in the delivery tube, and a return blood indicator arranged in the housing and connected to the fixed plate, the return blood indicator is provided with a return blood cavity connected to the return blood vessel, the return blood indicator is provided with a bleeding port connected to the return blood cavity, and a bleeding lead-out tube connected to the bleeding port, a displacement groove is provided on the housing, and the bleeding lead-out tube is movably arranged in the displacement groove;

[0014] The proximal end of the return blood vessel is an L-shaped structure, and a blood inlet connected to the outside is provided on the L-shaped end. A sealing ring groove is provided on the side wall of the return blood chamber, and a sealing ring is provided in the sealing ring groove, and the sealing ring is sleeved on the return blood vessel;

[0015] A delivery cavity isolated from the blood return cavity is provided in the blood return indicator, the distal end of the delivery tube is fixed in the delivery cavity, a fixed protrusion is provided on the blood return indicator, a fixed groove matched with the fixed protrusion is opened on the fixed plate, the fixed protrusion is arranged in the fixed groove, a limiting piece connected with the fixed protrusion is provided on the delivery tube, a first limiting strip is provided on the limiting piece, a first limiting block A and a first limiting block B matched with the fixed protrusion are provided on the first limiting strip, and the first limiting block A and the first limiting block B are clamped on the fixed protrusion.

[0016] Further, the second driving mechanism includes a blocking release button disposed outside the housing, a sector gear connected to the blocking release button and the fixing plate respectively, and a release rod disposed in the delivery pipe and connected to the housing;

[0017] The sector gear includes a gear sector and a rotating shaft provided on the gear sector and hingedly connected to the blocking release button. A third rack matched with the gear sector is provided on the fixed plate. The gear sector is meshed with the third rack. An arc-shaped protrusion is provided on the gear sector. A guide arc groove matched with the arc-shaped protrusion is provided in the housing. The arc-shaped protrusion is installed in the guide arc groove.

[0018] The blocking release button includes a button panel, a rotating member arranged on the button panel, and a fixing member arranged on the rotating member, the rotating member is provided with a receiving groove adapted to the rotating shaft, the rotating shaft is hingedly connected to the button panel, the button panel is arranged outside the housing, and the fixing member is hingedly connected inside the housing;

[0019] The distal end of the release rod is L-shaped, and a first limiting column is provided in the shell. The first limiting column is provided with an L-shaped groove matched with the distal end of the release rod. The distal end of the release rod is embedded in the L-shaped groove, and the proximal end of the release rod is provided with a release head. The diameter of the release head is larger than the outer diameter of the release rod and smaller than the inner diameter of the delivery tube. The release head is located behind the blocking material, and the positioning guide wire and the release rod pass through the delivery tube and extend from the delivery cavity into the shell.

[0020] Furthermore, the retreat indication mechanism includes an indication window arranged on the shell, and an indication panel arranged in the indication window and connected to the positioning guide wire, the indication panel is provided with a connecting piece, the connecting piece is provided with a clip, the positioning guide wire is provided with a connecting sleeve, the connecting sleeve is provided with a clip groove matched with the clip, the clip is clamped in the clip groove, the positioning guide wire is provided with a buffer spring, and the buffer spring is located between the connecting sleeve and the blood return indicator.

[0021] Furthermore, the indication panel includes a blank area and an information area, the information area is located at the front end of the blank area, an information mark is provided on the information area, an information pattern is provided at the front end of the information mark, a display area used in conjunction with the information mark is provided on the indication window, and a display window is provided on the display area for observing the information mark moving with the indication panel.

[0022] Furthermore, a guide groove and a second limiting column are provided in the housing, the front section of the push rod is arranged in the guide groove, and the middle section of the push rod is provided with a limiting block which is unidirectionally limited by the second limiting column;

[0023] A first fixing column is provided in the housing, a convex block is provided in the middle section of the push rod, a second fixing column is provided on the convex block, a limit spring for limiting the push rod is provided between the first fixing column and the second fixing column, and both ends of the limit spring are respectively fixed to the first fixing column and the second fixing column;

[0024] A first mounting groove is provided in the shell, a first transmission plate is movably provided in the first mounting groove, a second limiting strip is provided on the first transmission plate, a second limiting block A and a second limiting block B are provided on the second limiting strip, and a buffer block for slowing down the movement of the second limiting block B is provided on the first mounting groove.

[0025] Furthermore, two sets of parts are provided on the second transmission plate, and the positioning guide wire is passed through the two sets of parts. A movable sleeve is provided on the proximal set of parts, and the positioning guide wire is fixed in the movable sleeve. A limiting sleeve for limiting the movable sleeve is provided on the movable sleeve. The limiting sleeve is located between the two sets of parts, and the outer diameter of the limiting sleeve is larger than the outer diameter of the movable sleeve.

[0026] Furthermore, a marking point is provided on the delivery tube to prompt the delivery tube to enter the blocked blood vessel.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention has a simple structure, a scientific and reasonable design, and is easy to use. It sequentially performs arterial sheath introduction, occlusion site detection and positioning, and occlusion material release, thereby quickly and effectively achieving intracranial vascular opening occlusion, and is quick to operate and stable to use.

[0029] The present invention introduces the positioning guide wire and the blocking material inside the delivery tube into the blood vessel through the arterial sheath tube pre-placed at the opening point, and then the first driving mechanism extends the positioning guide wire from the delivery tube into the arterial blood vessel wall and restores the ring shape, and the positioning guide wire ring head is hooked on the inner wall of the blood vessel by the overall moving blocking device to complete the accurate positioning of the blocking site, and then the positioning guide wire and the delivery tube are withdrawn by the second driving mechanism, so that the blocking material in the delivery tube is released and exposed above the blood vessel incision point and gradually disappears below, and the blood-absorbing expansion is achieved to achieve blood vessel blocking. The present invention is small in size and simple to operate, and only two operations of pushing and pressing are required to quickly complete arterial blocking, which greatly shortens the operation time and reduces the pain of patients.

[0030] Interventional treatment of intracranial aneurysms is a minimally invasive surgery that involves opening holes in the brachial and femoral arteries, and using guidewires, catheters, stents, embolic agents, etc. to reach the intracranial blood vessels through the brachial and femoral arteries to carry out treatment. It requires accurate imaging or other devices to guide the operation and improve operational safety. The present invention combines the two major indications of the withdrawal indication mechanism and the arterial puncture indication mechanism to determine whether the release site has been reached and accurately positioned, whether the occluding material can be released, and whether it has been completely released, by positioning the displacement of the guidewire and the changes in the femoral movement of arterial blood, providing operational guidance for minimally invasive occlusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an external diagram of the present invention.

[0032] Figure 2 It is an enlarged view of the first driving mechanism and the second driving mechanism inside the present invention.

[0033] Figure 3 It is an enlarged view of the fixing plate of the present invention.

[0034] Figure 4 It is a top view of the fixing plate of the present invention.

[0035] Figure 5 This is an enlarged view of the first transmission plate of the present invention.

[0036] Figure 6 It is a top view of the first transmission plate of the present invention.

[0037] Figure 7 This is an enlarged view of the second transmission plate of the present invention.

[0038] Figure 8 It is a top view of the second transmission plate of the present invention.

[0039] Fig. 9 This is an enlarged view of the connection between the blocking release button and the sector gear of the present invention.

[0040] Fig.10 It is a side view of the blocking release button of the present invention.

[0041] Fig.11 It is an enlarged view of the arterial puncture indication mechanism of the present invention.

[0042] Fig.12 It is a cross-sectional view of the blood return indicator of the present invention.

[0043] Fig.13 It is a cross-sectional view of the blood return cavity of the present invention.

[0044] Fig.14 It is a side view of the blood return indicator of the present invention.

[0045] Fig.15 It is an enlarged view of the limiting member of the present invention.

[0046] Fig.16 It is a partial view of the outer shell of the present invention.

[0047] Fig.17 This is a connection diagram of the push rod of the present invention.

[0048] Fig.18 This is an enlarged view of the proximal end of the push rod of the present invention.

[0049] Fig.19 It is an enlarged view of the abdication indicating mechanism of the present invention.

[0050] Fig. 20 It is an enlarged view of the connecting sleeve of the present invention.

[0051] Fig.21 It is a side view of the connecting sleeve of the present invention.

[0052] Fig. 22 This is an enlarged view of the indicator panel of the present invention.

[0053] Fig.23 This is an enlarged view of the indicator window of the present invention.

[0054] Fig.24 This is a diagram of other connections inside the housing of the present invention.

[0055] The names corresponding to the reference numerals are:

[0056] 1-housing, 2-transmission tube, 3-positioning guide wire, 4-blocking material, 5-pushing head, 6-pushing rod, 7-first transmission plate, 8-fixing plate, 9-second transmission plate, 10-return blood vessel, 11-return blood indicator, 12-blocking release button, 13-sector gear, 14-release rod, 15-guide arc groove, 16-first limit column, 18-limiting member, 19-indication window, 20-indication panel, 21-connecting member , 22-clip buckle, 23-connecting sleeve, 24-clip groove, 25-buffer spring, 26-guide groove, 27-second limit column, 28-limit block, 29-first fixed column, 30-bump, 31-second fixed column, 32-limit spring, 33-first mounting groove, 34-buffer block, 35-marking point, 36-displacement groove, 71-first connecting plate, 72-first rack, 73-second limit bar, 74-second limit Block A, 75-slowing down the second limit block B, 81-installation groove, 82-rotation shaft, 83-rotation gear, 84-third rack, 85-fixed groove, 91-second rack, 92-set, 93-movable sleeve, 94-limit sleeve, 101-blood inlet, 111-blood return cavity, 112-bleeding port, 113-bleeding outlet tube, 114-sealing ring groove, 115-sealing ring, 116-transport cavity, 117 -fixed protrusion, 121-button panel, 122-rotating part, 123-fixed part, 124-storage slot, 131-gear sector, 132-rotating shaft, 133-arc-shaped protrusion, 141-release head, 181-first limit bar, 182-first limit block A, 183-first limit block B, 191-display area, 192-display window, 201-blank area, 202-information area, 203-information mark. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] like Figure 1-24 As shown, the present invention provides an intracranial vascular opening blocking device with a simple structure, scientific and reasonable design, and easy use. It is sequentially introduced into the blood vessel, the blocking site is detected and located, and the blocking material is released, thereby quickly and effectively realizing the intracranial vascular opening blocking operation, and the operation is quick and stable.

[0061] The present invention comprises a shell 1, a delivery tube 2 connected to the shell 1, a positioning guide wire 3 arranged in the delivery tube 2 for positioning a blocking point, and a blocking material 4 arranged in the delivery tube 2 for blood vessel blocking; the shell 1 is provided with a first driving mechanism connected to the positioning guide wire 3 for driving the positioning guide wire 3 to pop out to the blocking point, a withdrawal indicating mechanism connected to the positioning guide wire 3 for prompting withdrawal, a second driving mechanism connected to the first driving mechanism for driving the positioning guide wire 3 and the delivery tube 2 to withdraw and release the blocking material 4, and an arterial puncture indicating mechanism connected to the delivery tube 2 for prompting pulsating blood flow changes.

[0062] The present invention introduces the positioning guide wire 3 and the blocking material 4 inside the delivery tube 2 into the blood vessel through the arterial sheath tube pre-placed at the opening point, and then the positioning guide wire 3 is extended from the delivery tube 2 into the arterial blood vessel wall by the first driving mechanism and restored to a ring shape, and the arterial sheath tube and the blocking device are withdrawn as a whole so that the ring head of the positioning guide wire 3 hooks the inner wall of the blood vessel to complete the accurate positioning of the blocking site, and then the positioning guide wire 3 and the delivery tube 2 are withdrawn by the second driving mechanism, so that the blocking material 4 in the delivery tube 2 is released and exposed above the blood vessel incision point and gradually disappears below, and the blood-absorbing expansion is achieved to achieve blood vessel blocking. The present invention is small in size and simple to operate, and only two operations of pushing and pressing are required to quickly complete arterial blocking, which greatly shortens the operation time and reduces the pain of patients.

[0063] The present invention can realize accurate positioning by the first driving mechanism, and the positioning guide wire 3 is extended from the conveying tube 2 under the action of the first driving mechanism. The first driving mechanism includes a push head 5 arranged outside the housing 1, a push rod 6 arranged inside the housing 1 and connected to the push head 5, a first transmission plate 7 connected to the push rod 6, a fixed plate 8 arranged inside the housing 1, and a second transmission plate 9 arranged on the fixed plate 8 and connected to the first transmission plate 7, and the second transmission plate 9 is fixedly connected to the positioning guide wire 3. The fixed plate 8 is a channel steel structure, and a mounting groove 81 is arranged on the side wall of the fixed plate 8. The second transmission plate 9 is movably arranged in the mounting groove 81. A rotating shaft 82 is arranged between the top wall and the bottom wall of the fixed plate 8, and a rotating gear 83 is arranged on the rotating shaft 82; a first connecting plate 71 is vertically arranged on the first transmission plate 7, and a first rack 72 adapted to the rotating gear 83 is arranged on the first connecting plate 71, and a second rack 91 adapted to the rotating gear 83 is arranged on the second transmission plate 9, and the rotating gear 83 is meshed with the first rack 72 and the second rack 91 respectively.

[0064] By pushing the push head 5 outside the housing 1, the push rod 6, the first transmission plate 7 and the second transmission plate 9 are pushed to move, so that the positioning guide wire 3 provided on the second transmission plate 9 is extended from the delivery tube 2 and extends into the inner wall of the blood vessel at the opening point of the femoral artery, and then the blocking device and the arterial sheath are manually controlled to be withdrawn as a whole, so that the annular head of the positioning guide wire 3 hooks the inner wall of the blood vessel to achieve accurate positioning of the blocking. The arterial sheath outside the delivery tube 2 can be withdrawn so that the arterial sheath pushes the push head 5 until the push head 5 fits with the housing 1.

[0065] The push head 5, the push rod 6 and the first transmission plate 7 are linearly transmitted in sequence, so that the first rack 72 on the first connecting plate 71 drives the rotating gear 83 to rotate, and the rotating gear 83 drives the second transmission plate 9 to move. The linear transmission can be converted into a rotary transmission through the first rack 72 and the rotating gear 83, and then the rotary transmission can be converted into a linear transmission in the opposite direction through the rotating gear 83 and the second rack 91, so that the internal space of the shell 1 can be optimally utilized, making the blocking device compact, easy to carry and labor-saving to operate.

[0066] The first driving mechanism only drives the positioning guide wire 3 to move, and the second transmission plate 9 moves on the side wall of the fixing plate 8 through the installation groove 81, but does not drive the fixing plate 8 to move synchronously, so that the head of the positioning guide wire 3 can be extended from the delivery tube 2 to the inner wall of the blood vessel at the opening point of the femoral artery. Since the positioning guide wire 3 is made of nickel-titanium alloy with shape memory, it immediately returns to a ring shape after being extended, and the arterial sheath and the occluding device are withdrawn as a whole. The ring head of the positioning guide wire 3 can hook the inner wall of the blood vessel to achieve precise positioning.

[0067] A guide groove 26 and a second limiting column 27 are provided in the housing 1. The front section of the push rod 6 is provided in the guide groove 26. The guide groove 26 can ensure that the push rod 6 does not deviate when moving. A limiting block 28 is provided in the middle section of the push rod 6 and is unidirectionally limited by the second limiting column 27. One side of the limiting block 28 is a right-angled side, and the other two sides are arc-shaped sides. A first fixed column 29 is provided in the housing 1. A protrusion 30 is provided in the middle section of the push rod 6. A second fixed column 31 is provided on the protrusion 30. A limiting spring 32 for limiting the push rod 6 is provided between the first fixed column 29 and the second fixed column 31. The two ends of the limiting spring 32 are respectively fixed on the first fixed column 29 and the second fixed column 31. The limiting spring 32 limits the movement displacement of the push rod 6 and the extension length of the positioning guide wire 3. When the push rod 6 is pushed and moved, the arc-shaped edge of the limit block 28 can pass through the second limit column 27 under the action of pressure. At this time, the limit spring 32 is stretched. In order to prevent the push rod 6 from moving back under the elastic action of the limit spring 32, one side of the limit block 28 is set as a right-angle side, which can effectively limit the push rod 6 from moving back.

[0068] A first mounting groove 33 is provided in the housing 1, and the first transmission plate 7 is movably provided in the first mounting groove 33. Since the first transmission plate 7 can be moved by the push rod 6, the first mounting groove 33 can play a role in guiding the movement of the first transmission plate 7. A second limiting strip 73 is provided on the first transmission plate 7, and a second limiting block A74 and a second limiting block B75 are provided on the second limiting strip 73. The second limiting block A74 is located at the end of the second limiting strip 73, and the second limiting block B75 is an arc-shaped convex block. A buffer block 34 for slowing down the movement of the second limiting block B75 is provided on the first mounting groove 33. The second limiting block A74 and the second limiting block B75 can prevent the positioning guide wire 3 from moving suddenly and slow down the insertion speed of the positioning guide wire 3. The second limiting block A74 limits the movement displacement of the first transmission plate 7 and the extension length of the positioning guide wire 3.

[0069] The second transmission plate 9 is provided with two sets 92, and the positioning guide wire 3 is passed through the two sets 92. The proximal set 92 is provided with a movable sleeve 93, and the positioning guide wire 3 is fixed in the movable sleeve 93. The movable sleeve 93 is provided with a limiting sleeve 94 for limiting the movable sleeve 93, and the limiting sleeve 94 is located between the two sets 92. The outer diameter of the limiting sleeve 94 is larger than the outer diameter of the movable sleeve 93. The positioning guide wire 3 and the movable sleeve 93 can move on the set 92, but are limited by the limiting sleeve 94, so that the positioning guide wire 3 can move with the second transmission plate 9.

[0070] The delivery tube 2 of the present invention is provided with a marking point 35 to indicate that the delivery tube 2 has entered the blocked blood vessel. The delivery tube 2 is inserted into the arterial sheath tube pre-set at the opening site at an angle of 30-45 degrees until the marking point 35 reaches the hemostatic valve at the end of the arterial sheath tube, and the marking point 35 is used as an indicator point to indicate that the delivery has been in place.

[0071] The present invention realizes the release of the blocking material 4 by the second driving mechanism, and through the withdrawal of the delivery tube 2 and the positioning guide wire 3, the blocking material 4 is relatively displaced with the positioning guide wire 3 and the delivery tube 2 under the action of inertia, and the blocking material 4 is assisted to be released quickly and accurately under the action of the release rod 14, which greatly reduces the release time and effectively avoids incomplete release or even release failure of the blocking material 4 remaining in the delivery tube 2.

[0072] The second driving mechanism includes a blocking release button 12 disposed outside the housing 1, a sector gear 13 connected to the blocking release button 12 and the fixing plate 8, respectively, and a release rod 14 disposed in the delivery pipe 2 and connected to the housing 1. The sector gear 13 includes a gear sector 131, and a rotating shaft 132 disposed on the gear sector 131 and hingedly connected to the blocking release button 12, a third rack 84 matched with the gear sector 131 is disposed on the fixing plate 8, the gear sector 131 is meshed with the third rack 84, an arc-shaped protrusion 133 is disposed on the gear sector 131, a guide arc groove 15 matched with the arc-shaped protrusion 133 is provided in the housing 1, and the arc-shaped protrusion 133 is installed in the guide arc groove 15. The blocking release button 12 includes a button panel 121, a rotating member 122 arranged on the button panel 121, and a fixing member 123 arranged on the rotating member 122. The rotating member 122 is provided with a storage groove 124 adapted to the rotating shaft 132. The rotating shaft 132 is hingedly connected to the button panel 121. The button panel 121 is arranged outside the shell 1, and the fixing member 123 is hingedly connected to the inside of the shell 1.

[0073] By pressing the button panel 121, the rotating shaft 132 hingedly connected to the button panel 121 drives the sector gear 13 to rotate, thereby causing the gear teeth on the sector gear 13 to engage with the third rack 84 on the fixed plate 8, driving the fixed plate 8 to move backward, and finally driving the positioning guide wire 3 connected to the fixed plate 8 and the delivery tube 2 indirectly connected to the fixed plate 3 through the blood return indicator 11 to be synchronously withdrawn, so that the blocking material 4 located in the delivery tube 2 is exposed above the vascular incision point and gradually sinks below it.

[0074] Before the blocking release button 12 is pressed, the rotation axis 132 of the sector gear 13 is arranged in the receiving groove 84, so that the sector gear 9 occupies a smaller area. When the blocking release button 12 is pressed, the sector gear 9 rotates and causes the gear sector 91 to rotate and mesh with the rack 10, thereby realizing the movement of the fixed plate 2. The arc-shaped protrusion 93 on the gear sector 91 is movably installed in the guide arc groove 13, and is used for guiding the movement of the sector gear 9, so that the gear sector 91 and the rack 10 are perfectly meshed and do not deviate.

[0075] The distal end of the release rod 14 is L-shaped, and a first limiting column 16 is provided in the housing 1. The first limiting column 16 is provided with an L-shaped groove 17 adapted to the distal end of the release rod 14. The distal end of the release rod 14 is embedded in the L-shaped groove 17. The positioning guide wire 3 and the release rod 14 pass through the delivery tube 2 and extend from the delivery cavity 116 into the housing 1. The release rod 14 is displaced only by the movement of the occluding device housing 1. The delivery tube 2 is inserted into the arterial sheath tube through the movement of the overall device housing 1 and enters the outside of the occluded blood vessel site. The proximal end of the release rod 14 is provided with a release head 141. The diameter of the release head 141 is larger than the outer diameter of the release rod 14 and smaller than the inner diameter of the delivery tube 4. The release head 141 is located behind the occluding material 4. The release head 141 can increase the pushing area with the occluding material 4 to avoid insufficient release.

[0076] Interventional treatment of intracranial aneurysms is a minimally invasive surgery that involves opening holes in the brachial and femoral arteries, and reaching the intracranial blood vessels through the brachial and femoral arteries with the help of guidewires, catheters, stents, embolic agents, etc. to carry out treatment. It requires accurate images or other devices to guide the operation and improve the safety of the operation. The present invention combines the two major indications of the withdrawal indication mechanism and the arterial puncture indication mechanism to determine the arrival of the release site and accurate positioning, whether the occluding material 4 can be released, and whether it is completely released by positioning the displacement of the guidewire 3 and the changes in the femoral movement of arterial blood, thereby providing operational guidance for minimally invasive occlusion.

[0077] The arterial puncture indication mechanism includes a return blood vessel 10 disposed in the delivery tube 2, and a return blood indicator 11 disposed in the housing 1 and connected to the fixing plate 8, wherein a return blood cavity 111 connected to the return blood vessel 10 is disposed in the return blood indicator 11, and a bleeding port 112 connected to the return blood cavity 111 and a bleeding outlet tube 113 connected to the bleeding port 112 are disposed on the return blood indicator 11. A displacement groove 36 is provided on the housing 1, and the bleeding outlet tube 113 is movably disposed in the displacement groove 36. The bleeding outlet tube 113 can lead the arterial blood in the return blood cavity 11 to the outside of the housing 1, so as to facilitate direct observation by the operator.

[0078] The return blood vessel 10 is arranged in the delivery tube 2 and enters the blood vessel through the arterial sheath along with the delivery tube 2. During the blocking and positioning process, arterial blood will flow into the return blood indicator 11 through the return blood vessel 10 and flow out from the bleeding port 112 on the return blood indicator 11. The operator can directly observe the arterial blood flow at the bleeding port 112 to determine whether the blocking device has reached and accurately positioned, and whether the blocking material has been accurately released. After the delivery tube 2 is introduced into the arterial sheath, the arterial sheath is slowly withdrawn to expose the delivery tube 2 inside the arterial blood vessel. At this time, arterial blood enters from the return blood vessel 10, flows out from the bleeding port 112 through the return blood indicator 11, and presents a pulsating jet shape, ensuring that it has accurately entered the blood vessel; the positioning guide wire 3 in the delivery tube 2 is driven to pop out by the first driving mechanism, and the arterial sheath and the delivery tube 2 are slowly withdrawn as a whole, so that the annular head of the positioning guide wire 3 hooks the inner wall of the blood vessel, and at the same time the delivery tube 2 is withdrawn from the blood vessel, and arterial blood cannot enter from the return blood vessel 10. At this time, the pulsating blood flow of the bleeding port 112 on the return blood indicator 11 is significantly slowed down or stopped, ensuring that it has accurately reached the blocking site. The present invention guides the operator to follow up by visualizing the changes in pulsating blood flow, and has a simple structure, simple operation, and easy observation.

[0079] The blood return indicator 11 is provided with a fixed protrusion 117, and the fixed plate 8 is provided with a fixed groove 85 matched with the fixed protrusion 117. The fixed protrusion 117 is arranged in the fixed groove 85, and the delivery tube 2 and the blood return indicator 11 can move synchronously with the fixed plate 8. The delivery tube 2 is provided with a limiter 18 connected with the fixed protrusion 117, and the limiter 18 is provided with a first limiter bar 181. The first limiter bar 181 is provided with a first limiter block A182 and a first limiter block B183 matched with the fixed protrusion 117, and the first limiter block A182 and the first limiter block B183 are clamped on the fixed protrusion 117. The spacing between the first limit block A182 and the first limit block B183 is greater than the length of the fixed protrusion 117. Since the blood return indicator 11 is connected to the fixed plate 8, the limiter 18 is disposed in the housing 1. The blood return indicator 11 can move with the fixed plate 8 on the one hand, and is limited by the limiter 18 on the other hand to control the withdrawal displacement of the delivery tube 2. The edges of the first limit block A182 and the first limit block B183 that are engaged with the fixed protrusion 117 are straight edges, and the other edges are arc edges.

[0080] The return blood indicator 11 is provided with a delivery cavity 116 isolated from the return blood cavity 111, and the distal end of the delivery tube 2 is fixed in the delivery cavity 116. The proximal end of the return blood vessel 10 is an L-shaped structure, and a blood inlet 101 connected to the outside is provided on the L-shaped end. A sealing ring groove 114 is provided on the side wall of the return blood cavity 111, and a sealing ring 115 is provided in the sealing ring groove 114. The sealing ring 115 is sleeved on the return blood vessel 10. In this way, the return blood vessel 10 and the delivery tube 2 are isolated from each other, and the arterial blood flow will not enter the delivery tube 2. It is only directly introduced from the return blood vessel 10 to the return blood indicator 11 through the blood inlet 101, ensuring that the plugging material 4, the positioning guide wire 3 or other structures in the inner cavity of the delivery tube 2 are not affected. At the same time, the sealing ring groove 114 and the sealing ring 115 can ensure the sealing of the return blood vessel 10.

[0081] The retreat indication mechanism of the present invention comprises an indication window 19 provided on the housing 1, and an indication panel 20 provided in the indication window 19 and connected to the positioning guide wire 3. In this way, the indication panel 20 can move synchronously with the positioning guide wire 3 to indicate the change of the positioning guide wire 3, and provide an operation basis for the blockage retreat. A connecting member 21 is provided on the indication panel 20, a clip 22 is provided on the connecting member 21, a connecting sleeve 23 is provided on the positioning guide wire 3, a clip groove 24 adapted to the clip 22 is provided on the connecting sleeve 23, and the clip 22 is clamped in the clip groove 24. The indication panel 20 is clamped on the positioning guide wire 3, which is convenient for the connection and disassembly of the indication panel 20 and the positioning guide wire 3. Since the diameter of the positioning guide wire 3 is small, the clamping area of ​​the indication panel 20 and the positioning guide wire 3 is small, which may cause the indication panel 20 to be clamped unstable or even fall off during the movement of the positioning guide wire 3. For this reason, the clamping area can be increased by the connecting sleeve 23, and the clamping by the clip groove 24 can ensure that the clamping is more stable. A buffer spring 25 is sleeved on the positioning guide wire 3, and the buffer spring 25 is located between the connecting sleeve 23 and the blood return indicator 11. The buffer spring 25 can play a buffering role for the indicator panel 20 during the ejection process of the positioning guide wire 3, avoiding direct collision with the blood return indicator 11 and affecting the blocking operation, thereby ensuring the operational stability of the overall structure.

[0082] The indication panel 20 includes a blank area 201 and an information area 202, the information area 202 is located at the front end of the blank area 201, an information mark 203 is provided on the information area 202, an information pattern 204 is provided at the front end of the information mark 203, a display area 191 used in conjunction with the information mark 203 is provided on the indication window 19, and a display window 192 for observing the information mark 203 moving with the indication panel 20 is provided on the display area 191. Preferably, the information area 202 is black, the information mark 203 is white, the information pattern 204 is red, the display area 191 is black, and the display window 192 is transparent. The indication window 19 is made of transparent PP material, and there are at least two display windows 192, which are arranged side by side, and the number of the information marks 203 is the same as that of the display windows.

[0083] Observing the changes of the indicator panel 20 through the indicator window 19 can ensure the accurate position change of the plugging material 4, thereby indicating the release of the plugging material 4. The indicator panel 20 is connected to the positioning guide wire 3, and the indicator window 19 can display the positioning of the positioning guide wire 3. The force between the annular head of the positioning guide wire 3 and the inside of the blood vessel causes the indicator window 19 to change from black-white to black-black, indicating that the plugging material 4 is correctly positioned and waiting to be released.

[0084] Subsequent operations can only be performed if the indication conditions of the arterial puncture indication mechanism and the withdrawal indication mechanism are met at the same time. The indication is as follows: when the indication window 19 is black-white, it has not yet been positioned to the releasable position, and the blocking material cannot be released at this time; when the indication window 19 turns black-black, if the bleeding of the bleeding port 112 of the blood return indicator 11 is also significantly slowed down, fix the arterial sheath, and immediately release the blocking material through the second drive mechanism; when the indication window 19 turns black-red, the blocking material 4 is slightly higher than the blood vessel rupture, and the withdrawal tension is slowly released until the indication window 19 turns black-black. If there is still no change, manual pressure is used. The indication marks of the arterial puncture indication mechanism and the withdrawal indication mechanism must appear in sequence.

[0085] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting them, and certainly not limiting the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In other words, any changes or modifications made to the main design concept and spirit of the present invention that have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. An intracranial vascular opening blocking device, characterized in that: The invention comprises a housing (1), a delivery tube (2) connected to the housing (1), a positioning guide wire (3) arranged in the delivery tube (2) for positioning a blocking point, and a blocking material (4) arranged in the delivery tube (2) for blocking a blood vessel; the housing (1) is provided with a first driving mechanism connected to the positioning guide wire (3) for driving the positioning guide wire (3) to pop out to the blocking point, a withdrawal indicating mechanism connected to the positioning guide wire (3) for prompting withdrawal, a second driving mechanism connected to the first driving mechanism for driving the positioning guide wire (3) and the delivery tube (2) to withdraw and release the blocking material (4), and an arterial puncture indicating mechanism connected to the delivery tube (2) for prompting changes in pulsating blood flow; the first driving mechanism The mechanism comprises a push head (5) arranged outside a housing (1), a push rod (6) arranged inside the housing (1) and connected to the push head (5), a first transmission plate (7) connected to the push rod (6), a fixed plate (8) arranged inside the housing (1), and a second transmission plate (9) arranged on the fixed plate (8) and connected to the first transmission plate (7), wherein the second transmission plate (9) is fixedly connected to the positioning guide wire (3); a first connecting plate (71) is vertically arranged on the first transmission plate (7), a first rack (72) matched with a rotating gear (83) is arranged on the first connecting plate (71), a second rack (91) matched with the rotating gear (83) is arranged on the second transmission plate (9), and the rotating gear (8 3) are respectively meshed with the first rack (72) and the second rack (91); the second driving mechanism comprises a blocking release button (12) arranged outside the housing (1), a sector gear (13) respectively connected to the blocking release button (12) and the fixing plate (8), and a release rod (14) arranged in the delivery pipe (2) and connected to the housing (1); the sector gear (13) comprises a gear sector (131) and a first rotating shaft (132) arranged on the gear sector (131) and hingedly connected to the blocking release button (12); a third rack (84) adapted to the gear sector (131) is provided on the fixing plate (8); the gear sector (131) meshes with the third rack (84); the gear sector (131) meshes with the third rack (84); An arc-shaped protrusion (133) is provided on the fan surface (131), and a guide arc groove (15) matched with the arc-shaped protrusion (133) is opened in the shell (1), and the arc-shaped protrusion (133) is installed in the guide arc groove (15); two sets (92) are provided on the second transmission plate (9), and the positioning guide wire (3) is passed through the two sets (92); a movable sleeve (93) is provided on the proximal set (92), and the positioning guide wire (3) is fixed in the movable sleeve (93); a limiting sleeve (94) for limiting the movable sleeve (93) is provided on the movable sleeve (93), and the limiting sleeve (94) is located between the two sets (92), and the outer diameter of the limiting sleeve (94) is larger than the outer diameter of the movable sleeve (93).

2. The intracranial vascular opening blocking device according to claim 1, characterized in that: The fixing plate (8) is a channel steel structure, a side wall of the fixing plate (8) is provided with a mounting groove (81), the second transmission plate (9) is movably arranged in the mounting groove (81), a second rotating shaft (82) is arranged between the top wall and the bottom wall of the fixing plate (8), and a rotating gear (83) is arranged on the second rotating shaft (82).

3. The intracranial vascular opening blocking device according to claim 1, characterized in that: The arterial puncture indicating mechanism comprises a return blood vessel (10) arranged in a delivery tube (2), and a return blood indicator (11) arranged in a housing (1) and connected to a fixed plate (8); a return blood chamber (111) connected to the return blood vessel (10) is arranged in the return blood indicator (11); a bleeding port (112) connected to the return blood chamber (111) and a bleeding outlet tube (113) connected to the bleeding port (112) are arranged on the return blood indicator (11); a displacement groove (36) is provided on the housing (1), and the bleeding outlet tube (113) is movably arranged in the displacement groove (36); the proximal end of the return blood vessel (10) is an L-shaped structure, and a blood inlet (101) connected to the outside is provided on the L-shaped end; a sealing ring groove (114) is provided on the side wall of the return blood chamber (111), and a sealing ring (115) is provided in the sealing ring groove (114), and the sealing ring (115) is provided in the sealing ring groove (114). ) is sleeved on the return blood vessel (10); a delivery cavity (116) isolated from the return blood cavity (111) is provided in the return blood indicator (11); a distal end of the delivery tube (2) is fixed in the delivery cavity (116); a fixed protrusion (117) is provided on the return blood indicator (11); a fixed groove (85) adapted to the fixed protrusion (117) is opened on the fixed plate (8); the fixed protrusion (117) is arranged in the fixed groove (85) A limiting member (18) connected to the fixed protrusion (117) is provided on the conveying pipe (2); a first limiting strip (181) is provided on the limiting member (18); a first limiting block A (182) and a first limiting block B (183) adapted to the fixed protrusion (117) are provided on the first limiting strip (181); the first limiting block A (182) and the first limiting block B (183) are clamped on the fixed protrusion (117).

4. The intracranial vascular opening blocking device according to claim 3, characterized in that: The blocking release button (12) comprises a button panel (121), a rotating member (122) arranged on the button panel (121), and a fixing member (123) arranged on the rotating member (122); a receiving groove (124) adapted to a first rotating shaft (132) is provided on the rotating member (122); the first rotating shaft (132) is hingedly connected to the button panel (121); the button panel (121) is arranged outside the housing (1); the fixing member (123) is hingedly connected to the inside of the housing (1); the distal end of the release rod (14) is L-shaped; a first rotating shaft (132) is provided inside the housing (1); A first limiting column (16) is provided on the first limiting column (16) with an L-shaped groove (17) matched with the distal end of the release rod (14), the distal end of the release rod (14) is embedded in the L-shaped groove (17), the proximal end of the release rod (14) is provided with a release head (141), the diameter of the release head (141) is larger than the outer diameter of the release rod (14) and smaller than the inner diameter of the delivery tube (2), the release head (141) is located behind the plugging material (4), the positioning guide wire (3) and the release rod (14) pass through the delivery tube (2) and extend from the delivery cavity (116) into the housing (1).

5. The intracranial vascular opening blocking device according to claim 1, characterized in that: The retreat indication mechanism comprises an indication window (19) arranged on a housing (1), and an indication panel (20) arranged in the indication window (19) and connected to a positioning guide wire (3); a connecting piece (21) is arranged on the indication panel (20); a clip (22) is arranged on the connecting piece (21); a connecting sleeve (23) is arranged on the positioning guide wire (3); a clip groove (24) matched with the clip (22) is formed on the connecting sleeve (23); the clip (22) is clamped in the clip groove (24); a buffer spring (25) is sleeved on the positioning guide wire (3); and the buffer spring (25) is located between the connecting sleeve (23) and the blood return indicator (11).

6. The intracranial vascular opening blocking device according to claim 4, characterized in that: The indicating panel (20) comprises a blank area (201) and an information area (202), the information area (202) being located at the front end of the blank area (201), an information mark (203) being provided on the information area (202), an information pattern (204) being provided at the front end of the information mark (203), a display area (191) being provided on the indicating window (19) for use with the information mark (203), and a display window (192) for observing the information mark (203) moving along with the indicating panel (20) being provided on the display area (191).

7. The intracranial vascular opening blocking device according to claim 1, characterized in that: A guide groove (26) and a second limiting column (27) are provided in the housing (1); a front section of the push rod (6) is provided in the guide groove (26); a middle section of the push rod (6) is provided with a limiting block (28) which is unidirectionally limited by the second limiting column (27); a first fixing column (29) is provided in the housing (1); a protrusion (30) is provided in the middle section of the push rod (6); a second fixing column (31) is provided on the protrusion (30); a limiting spring (31) which limits the push rod (6) is provided between the first fixing column (29) and the second fixing column (31). 2), two ends of the limit spring (32) are respectively fixed on the first fixing column (29) and the second fixing column (31); a first mounting groove (33) is provided in the housing (1), the first transmission plate (7) is movably arranged in the first mounting groove (33), a second limit strip (73) is provided on the first transmission plate (7), a second limit block A (74) and a second limit block B (75) are provided on the second limit strip (73), and a buffer block (34) for slowing down the movement of the second limit block B (75) is provided on the first mounting groove (33).

8. The intracranial vascular opening blocking device according to claim 1, characterized in that: The delivery tube (2) is provided with a marking point (35) for prompting the delivery tube (2) to enter the blocked blood vessel.

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