CN219250553U - Intraoperative brain protection device - Google Patents
Intraoperative brain protection device Download PDFInfo
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- CN219250553U CN219250553U CN202222436555.3U CN202222436555U CN219250553U CN 219250553 U CN219250553 U CN 219250553U CN 202222436555 U CN202222436555 U CN 202222436555U CN 219250553 U CN219250553 U CN 219250553U
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Abstract
The utility model discloses an intraoperative brain protection device, which comprises a catheter and a filtering structure connected to the catheter, wherein the filtering structure comprises the following components: a distal filter connected to the distal section of the catheter and having a distal tip at the distal end and a distal mouth at the proximal end; a proximal filter connected to the proximal section of the catheter and having a proximal tip at a proximal end and a proximal mouth at a distal end; the far end side of the middle filter belt is connected with the mouth edge of the far bucket mouth, and the near end side of the middle filter belt is connected with the mouth edge of the near bucket mouth. According to the utility model, the far end side and the near end side of the middle filter belt are respectively connected with the far bucket opening of the far filter bucket and the near bucket opening of the near filter bucket, and the middle filter belt cannot be overturned around the catheter under the condition that both ends of the middle filter belt are fixed, so that the protection efficiency of cerebral arterial blood vessels is improved.
Description
Technical Field
The utility model belongs to the technical field of medical appliances, and particularly relates to an intraoperative brain protection device.
Background
With the wide clinical and developing of cardiovascular interventions worldwide. Such as transcatheter aortic valve replacement, transcatheter mitral valve replacement, etc. During surgery, calcified plaque, blood clots, etc. break and fall off, and enter into cerebral vessels or other important vessels along the blood flow direction, resulting in serious complications such as cerebral apoplexy.
In the prior art, there is a kind of thrombus protection device through the dry intervention of the head and arm, and when performing operations such as TAVI or through mitral valve replacement of femoral artery, for example, the technical scheme disclosed in the patent "system for protecting cerebral vessels (CN 112334093 a)" filed by boston science international company only protects two blood vessels, and the left common carotid artery blood vessel is not protected.
On the basis of the filtering device, the Chinese patent document CN111565673A continuously discloses a new technical scheme, and the blood vessel at the left common carotid artery blood vessel is filtered by adopting an independent funnel-shaped filter screen, which means that 3 filter screens are needed to protect 3 blood vessels, and the 3 filter screens are needed to be respectively conveyed into corresponding blood vessels, so that the operation complexity is increased.
Patent document CN110831545B discloses a protection device, the left common carotid artery is connected by a filter screen, and the filter screen is connected by a single nickel titanium wire, so that the use of materials is reduced, the structure is simplified, the release and recovery are facilitated, as shown in fig. 9, however, in the brain protector, since the filter screen 220 is fixed by a catheter, the filter screen 200 is easy to turn around the catheter after being flushed by blood because the catheter is of an axial property, so that thrombus in part of blood cannot be filtered out, and thus enters the left common carotid artery blood vessel, and the filter screen 220 is too small to be fixed and positioned on the catheter easily.
In addition, the above patent documents are all guided by a guide wire in the conveying process, the guide wire can only guide the brain protector into the blood vessel, and after the guide wire is guided, the bending state of the brain protector cannot be adjusted according to the arterial blood vessel, so that the implantation process is difficult to operate.
Disclosure of Invention
The utility model aims to provide a novel intraoperative brain protecting device which can effectively protect cerebral arterial blood vessels of various paths.
The utility model provides an intraoperative brain protection device, which comprises a catheter and a filtering structure connected to the catheter, wherein the filtering structure comprises:
a distal filter connected to the distal section of the catheter and having a distal tip at the distal end and a distal mouth at the proximal end;
a proximal filter connected to the proximal section of the catheter and having a proximal tip at a proximal end and a proximal mouth at a distal end;
the far end side of the middle filter belt is connected with the mouth edge of the far bucket mouth, and the near end side of the middle filter belt is connected with the mouth edge of the near bucket mouth.
In a preferred embodiment, the intraoperative brain protection device further has a support structure coupled to the catheter, the support structure having:
the opening edge of the far bucket opening is connected and supported on the far supporting ring, the far supporting ring is provided with a far locking point and two far connecting points which are positioned at two sides of the far locking point at a certain distance, and the far supporting ring is connected at the position, close to the middle section, of the far section of the catheter by virtue of the far locking point;
the opening edge of the near bucket opening is connected and supported on the near supporting ring, the near supporting ring is provided with a near locking point and two near points which are positioned at two sides of the near locking point at a certain distance, and the near supporting ring is connected at the position, close to the middle section, of the near section of the catheter by the near locking point;
the far ends of the two middle supporting wires are respectively connected with two far-distance joints on the far supporting ring, the near ends of the two middle supporting wires are respectively connected with two near-distance joints on the near supporting ring, and the two belt sides of the middle filter belt are respectively connected and supported on the two middle supporting wires.
In a preferred embodiment, the intraoperative brain protection device further has a locking structure for securing the filtering structure and the supporting structure to the catheter, the locking structure having, in order from distal end to proximal end:
a distal lock, said distal lock being sleeved over the distal section of said catheter and locking the distal tip of said distal filter cartridge to the distal section of said catheter;
the far ring lock is connected with a far lock point of the far support ring and sleeved at a position, close to the middle section, of the far section of the catheter, so that the far support ring is connected at the position, close to the middle section, of the far section of the catheter;
the proximal lock is connected with a proximal lock point of the proximal support ring and sleeved at a position, close to the middle section, of the proximal section of the catheter, so that the proximal support ring is connected at the position, close to the middle section, of the proximal section of the catheter;
and the proximal lock is sleeved on the proximal section of the catheter and locks the proximal tip of the proximal filter bucket on the proximal section of the catheter.
Preferably, the distal lock, the proximal lock and the proximal lock are provided with axial through holes, and the distal lock, the proximal lock and the proximal lock are respectively fixedly sleeved on the distal section, the distal section near the middle section, the proximal section near the middle section and the proximal section of the catheter by the axial through holes.
In a preferred embodiment, the intraoperative brain protection device further has: a bend-adjusting wire, the bend-adjusting wire being parallel to the catheter; the far-end lock, the near-end lock and the near-end lock are respectively provided with a stay wire hole, the axes of the far-end lock, the near-end lock and the near-end lock are parallel and correspond to each other, the far end of the bending-adjusting stay wire is fixed in the stay wire holes of the far-end lock, and the near-end section of the bending-adjusting stay wire sequentially and movably passes through the stay wire holes of the near-end lock and the stay wire holes of the near-end lock.
In a preferred embodiment, the intraoperative brain protection device further has a T-shaped guide head with:
a column-shaped plug-in part connected with the distal end of the catheter;
the round table type head, the proximal end face of round table type head is greater than the distal end face of post type grafting portion, the distal end face of post type grafting portion is integrative to be connected in the proximal end face center of round table type head.
Preferably, the arc length of the connection between the edge of the far bucket mouth and the far end side of the middle filter belt accounts for 30% -80%, preferably 45% -70%, more preferably 50% -60% of the circumference of the edge of the whole far bucket mouth; the arc length of the connection between the edge of the near-bucket mouth and the near-end side of the middle filter belt accounts for 30% -80%, preferably 45% -70%, more preferably 50% -60% of the circumference of the edge of the near-bucket mouth.
Preferably, the distal filter funnel and the proximal filter funnel are both conical structures.
Preferably, the far filter funnel, the near filter funnel and the middle filter belt are all filter films.
Preferably, the far filter funnel, the near filter funnel and the middle filter belt are filter screens.
Preferably, the material of the far support ring, the near support ring and the middle support wire is any one or more of nickel-titanium alloy, cobalt-chromium alloy and platinum-iridium alloy.
Preferably, the distal lock, the proximal lock and the proximal lock are provided with axial through holes, and the distal lock, the proximal lock and the proximal lock are fixedly sleeved on the catheter by virtue of the axial through holes.
Preferably, at least one of the far filter funnel, the near filter funnel and the middle filter belt is a filter screen woven by woven wires;
wherein the braided wire is nickel titanium wire, cobalt chromium wire or platinum iridium wire.
Preferably, the angle of the far tip of the far filter bucket is 30-45 degrees;
the angle of the near tip of the near filter funnel is 30-45 degrees.
Preferably, the distal end side of the middle filter belt is integrally connected with the mouth edge of the distal bucket mouth, and the proximal end side of the middle filter belt is integrally connected with the mouth edge of the proximal bucket mouth.
Preferably, a plurality of developing rings are arranged on the guide pipe at intervals.
The utility model has the positive progress effects that:
1. according to the utility model, the distal end side and the proximal end side of the middle filter belt are respectively connected with the distal bucket opening of the distal filter bucket and the proximal bucket opening of the proximal filter bucket, so that the area of the middle filter belt is enlarged, and the risk of thrombus omission at the left common carotid artery is avoided. Secondly, under the condition that both ends of the middle filter belt are fixed, the middle filter belt is prevented from overturning around the catheter, so that the protection efficiency of cerebral arterial blood vessels is improved;
2. the utility model is provided with the supporting structure, so that the two sides of the middle filter belt of the filtering structure are supported and fixed on the two middle supporting wires of the supporting structure, the middle filter belt can be further prevented from being overturned by blood washing, and the protection efficiency of cerebral arterial vessels is further improved;
3. the utility model is provided with the locking structure, so that the far filter bucket and the near filter bucket of the filter structure can be effectively fixed on the guide pipe without position deviation;
4. the utility model is provided with the bending-adjusting stay wire which is parallel to the catheter, so that after the brain protection device is guided into the corresponding arterial vessel through the guide wire, the bending-adjusting stay wire can be pulled at the proximal end to effectively bend the catheter according to the vessels with different branches, for example, the middle connecting part of the bending-adjusting catheter can be adjusted by rotating the handle, and the brain protection device is suitable for different branch structures;
5. the T-shaped guide head with the round table-shaped head is arranged, and only needs to be assembled with the sheath tube in the conveying process of the brain protection device, so that the touch damage to the vascular wall is effectively reduced, and the brain protection device can reach the appointed target position quickly in operation.
6. The utility model can effectively filter and enter three branch thrombi at the subclavian artery opening, and does not interfere with surgical instruments.
Drawings
FIG. 1 is a side view of an intraoperative brain protection device of the present utility model;
FIG. 2 is a front view of the intraoperative brain protection device of the present utility model;
FIG. 3 is a side view of a midbrain protection device concealing a midfilter belt 53;
FIG. 4 is an enlarged view of a portion of FIG. 1 at A;
FIG. 5 is a partial enlarged view at B in FIG. 3;
FIG. 6 is a side view of the locking structure;
FIG. 7 is a schematic view showing the state of use of the intraoperative brain protection device of the present utility model;
FIG. 8 is a side view of another construction of the intraoperative brain protection device of the present utility model;
fig. 9 is a schematic view showing a state of use of the brain protector according to the prior art.
Detailed Description
In order that the manner in which the utility model is practiced, as well as the features and objects and functions thereof, will be readily understood and appreciated, the utility model will be further described in connection with the accompanying drawings.
In the field of interventional medical devices, "distal" is defined as the end or section of the surgical procedure that is distal to the operator, and "proximal" is defined as the end or section of the surgical procedure that is proximal to the operator, and "middle" is defined as the section between "distal" and "proximal".
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly, or indirectly, through intermediaries, may be in communication with each other, or may be in interaction with each other, unless explicitly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1 to 3, the intraoperative brain protection device of the present utility model has a catheter 30, a support structure 40, a filtering structure 50, a locking structure 60, and a bending tension wire 70.
As further shown in fig. 1-3, in this example, the catheter 30 is a flexible, elongate, hollow tubular structure having a hollow interior through which a guide wire (not shown) may be passed. The catheter 30 is made of PEEk, PTFE and other plastics. Since these materials cannot be developed, in order to observe the delivery position of the catheter 30 during the delivery process, a plurality of developing rings (not shown) may be disposed on the catheter 30 at a certain distance, and the arrangement of the developing rings can quickly and conveniently confirm the delivery position of the catheter. The catheter 30 is threaded inside the sheath of the delivery device during delivery. To facilitate delivery, a T-shaped guide head 31 is provided at the distal end of catheter 30. As shown in fig. 4, the guide head 31 has a columnar insertion portion 311 connected to the distal end of the catheter 30; the columnar insertion part 311 is inserted into the distal end of the sheath of the conveyor, and the outer diameter of the columnar insertion part 311 is basically consistent with the inner diameter of the sheath of the conveyor. The distal end of the guide head 31 further has a truncated cone-shaped head 312, and the proximal end surface of the truncated cone-shaped head 312 is larger than the distal end surface of the columnar insertion portion 311, and the distal end surface of the columnar insertion portion 311 is integrally connected to the center of the proximal end surface of the truncated cone-shaped head 312. The proximal face of the frustoconical head 312 has an outer diameter substantially corresponding to the outer diameter of the sheath (e.g., a 6F to 10F sheath), so that during delivery, the proximal face of the frustoconical head 312 abuts the distal face of the sheath of the delivery device. The support structure 40, the filtering structure 50, the locking structure 60 and the bending wire 70 connected to the catheter 30 are folded and stored inside the sheath of the conveyor, and the guiding head 31 drives the catheter 30 to reach the target aortic blood vessel along with the sheath of the conveyor.
As further shown in fig. 1-3 and 5, in this example, the support structure 40 is, as the name implies, a frame structure for supporting, and in the present utility model, particularly the filter structure 50. The support structure 40 of this example has a distal support ring 41, a proximal support ring 42, and two middle support wires 43, and the material may be any one or more of nickel-titanium alloy, cobalt-chromium alloy, and platinum-iridium alloy. The distal support ring 41 and the proximal support ring 42 are each generally of a circular ring configuration. The distal section of the filtering structure 50 is supported and connected on the distal support ring 41, the distal support ring 41 is provided with a distal locking point 411 and two distal joints 412 positioned at two sides of the distal locking point 411 at a certain distance, the distal locking point 411 is connected with the distal ring lock 62 of the locking structure 60, and the distal ring lock 62 is sleeved and fixed at the position of the distal section of the catheter 30 close to the middle section, so that the distal support ring 41 can be connected at the position of the distal section of the catheter 30 close to the middle section through the distal locking point 411 and the distal ring lock 62. Similarly, the proximal section of the filtering structure 50 is supported on the proximal support ring 42, the proximal support ring 42 has a proximal locking point 421 and two proximal points 422 located at two sides of the proximal locking point 421 at a certain distance, the proximal locking point 421 is connected to the proximal lock 63 of the locking structure 60, and the proximal lock 63 is sleeved and fixed on the proximal section of the catheter 30 near the middle section, so that the proximal support ring 42 can be connected to the proximal section of the catheter 30 near the middle section through the proximal locking point 421 and the proximal lock 63. The two middle supporting wires 43 are two wires which are parallel and spaced at a certain distance, the distal ends of the two middle supporting wires 43 are respectively connected with two distal joints 412 on the distal supporting ring 41, and the proximal ends of the two middle supporting wires 43 are respectively connected with two proximal joints 422 on the proximal supporting ring 42, so that the two middle supporting wires 43, the distal supporting ring 41 and the proximal supporting ring 42 at the proximal end together enclose a frame structure. The two sides of the middle section of the filter structure 50 are respectively supported on the two middle supporting wires 43. The two ends of the middle section of the filtering structure 50 are respectively connected with the distal section and the proximal section of the filtering structure 50, and the distal section and the proximal section of the filtering structure 50 are respectively supported and connected on the distal support ring 41 and the proximal support ring 42, so that the two end sides of the middle section of the filtering structure 50 are also supported on the distal support ring 41 and the proximal support ring 42. Under the condition that the peripheral sides of the middle section of the filtering structure 50 are supported and fixed, flowing blood can not wash and overturn the middle section of the filtering structure 50, so that the protection efficiency of cerebral arterial blood vessels is greatly improved.
As further shown in fig. 1-3 and 5, in this example, the filter structure 50 has a distal section, a middle section, and a proximal section. The distal segment of the filter structure 50 is a distal filter house 51. The distal filter basket 51 is substantially in the shape of a conical funnel, and may be a filter screen or a filter membrane, and the filter membrane may be any one or more of polyurethane, PET, PTFE, and other polymers, and has pores ranging from 100 to 200 μm. The distal filter house 51 has a distal tip 511 and a proximal distal mouth 512, the distal tip 511 extending proximally and expanding proximally to the distal mouth 512, whereby the distal filter house 51 forms a funnel structure resembling a cone. The distal tip 511 is fixed to the distal section of the catheter 30 by a distal lock 61 of the locking structure 60, and the distal opening 512 is supportively connected to the distal support ring 41 by one or more of sewing, wrapping, and hot melting between the filtering membrane of the distal opening 512 and the distal support ring 41. The distal support ring 41 is in turn connected to the distal section of the catheter 30 near the middle section by a distal lock point 411 and a distal ring lock 62 of the locking structure 60, whereby the distal filter basket 51 is fixed to the distal section of the catheter 30.
The proximal segment of the filter structure 50 of this example is a proximal filter house 52. The proximal filter basket 52 is also generally conical funnel shaped, and may be a filter screen or a filter membrane, which may be made of any one or more of polyurethane, PET, PTFE, and other polymers, and has pores ranging from 100 to 200 μm. The proximal filter funnel 52 has a proximal tip 521 at a proximal end and a proximal mouth 522 at a distal end, the proximal tip 521 extending distally and expanding distally to reach the proximal mouth 522, whereby the proximal filter funnel 52 also forms a funnel structure resembling a cone shape. The proximal tip 521 is secured to the proximal segment of the catheter 30 by the proximal lock 64 of the locking structure 60 and the proximal port 522 is in supporting connection with the proximal support ring 42, which may be similarly connected between the filtering membrane of the proximal port 522 and the proximal support ring 42 by one or more of sewing, wrapping, and hot-melting. The proximal support ring 42 is in turn connected to the proximal section of the catheter 30 near the middle section by a proximal lock point 421 and a proximal ring lock 63 of the locking structure 60, whereby the proximal filter cartridge 52 is secured to the proximal section of the catheter 30.
The middle section of the filtering structure 50 in this example is a middle filtering belt 53, which is a substantially rectangular structure, and the middle filtering belt 53 may be a filtering net, or may be a filtering film, for example, any one or more of polyurethane, PET, PTFE, and other polymers, and the pores thereof are between 100 and 200 μm. The distal side of the middle filter belt 53 is connected to the edge of the distal mouth 512 of the distal filter basket 51, preferably, the distal side of the middle filter belt 53 is integrally connected to the edge of the distal mouth 512 of the distal filter basket 51. The arc length of the connection between the edge of the distal orifice 512 and the distal end side of the middle filter belt 53 is 30% to 80%, preferably 45% to 70%, and more preferably 50% to 60% of the entire perimeter of the edge of the distal orifice 512. The proximal side of the middle filter belt 53 is connected to the rim of the proximal mouth 522 of the proximal filter basket 52, and similarly, the proximal side of the middle filter belt 53 is integrally connected to the rim of the proximal mouth 522 of the proximal filter basket 52. The arc length of the connection between the edge of the proximal opening 522 and the proximal side of the middle filter belt 53 is 30% to 80%, preferably 45% to 70%, and more preferably 50% to 60% of the entire perimeter of the edge of the proximal opening 522. The two belt sides of the middle filter belt 53 are respectively connected with the two middle supporting wires 43 in a supporting way, and in the same way, the connection mode can also be that the filtering films on the two belt sides of the middle filter belt 53 are connected with the two middle supporting wires 43 by one or more methods of sewing, braiding, wrapping and hot melting. In this manner, the proximal, distal and both sides of the central filter belt 53 are respectively connected to the support structure 40, so that the central filter belt is not turned over by the flushing of blood under the flow of blood, thereby greatly improving the protection efficiency of cerebral arterial blood vessels.
As shown in fig. 1-3, in this example, it is preferable that the intraoperative brain protection device of the present utility model is further provided with a locking structure 60, and the support structure 40 and the filtering structure 50 can be well fixed in place in the catheter 30 by the provision of the locking structure 60. The locking structure 60 has, in order from distal to proximal, a distal lock 61, a distal lock 62, a proximal lock 63 and a proximal lock 64, all of which are generally cylindrical-like structures. As shown in fig. 6, the distal lock 61, the distal lock 62, the proximal lock 63, and the proximal lock 64 each have an axial through hole 60a. The distal lock 61, the distal ring lock 62, the proximal ring lock 63 and the proximal lock 64 are fixedly sleeved on the distal section, the distal section near the middle section, the proximal section near the middle section and the proximal section of the catheter 30 respectively by the axial through hole 60a. The distal lock 61 is used for sleeving the distal tip 511 of the distal filter bucket 51 on the distal section of the catheter 30, and the distal ring lock 62 is connected with the distal lock point 411 of the distal support ring 41 and sleeved at the position close to the middle section of the distal section of the catheter 30, so that the distal bucket opening 512 is connected at the position close to the middle section of the distal section of the catheter 30, in such a way that the distal section of the filter structure 50, namely the distal filter bucket 51, is fixed on the distal section of the catheter 30. Similarly, the proximal lock 64 engages the proximal tip 521 of the proximal filter cartridge 52 about the proximal segment of the catheter 30, and the proximal lock 63 engages the proximal lock point 421 of the proximal support ring 42 about the proximal segment of the catheter 30, thereby engaging the proximal port 522 about the proximal segment of the catheter 30, in such a manner that the proximal segment of the filter structure 50, i.e., the proximal filter cartridge 52, is secured to the proximal segment of the catheter 30. The distal ring lock 62, the proximal ring lock 63 and the proximal lock 64 are provided with stay wire holes 60b, corresponding axis through holes 60a are parallel, the distal end of the bending stay wire 70 is fixed in the stay wire holes 60b of the distal ring lock 62, 60c is a welding part of the support ring, and the proximal section of the bending stay wire 70 sequentially passes through the stay wire holes 60b of the proximal ring lock 63 and the stay wire holes 60b of the proximal lock 64. The distal end of the bending-adjusting wire 70 is fixed in this way, and the proximal section part can freely pass through the proximal ring lock 63 and the proximal end lock 64 fixed on the catheter 30, so that the purpose of setting the catheter 30 in parallel with the axial direction can be achieved, and the catheter 30 can be conveyed to a target position along with the catheter, as shown in fig. 7, when the bending degree of the catheter 30 needs to be adjusted, the middle section of the catheter 30 can be pulled and bent only by operating the rotating handle at the external proximal end to pull the bending-adjusting wire 70, so that the bending trend of the catheter is consistent with that of a target blood vessel, and the catheter is suitable for blood vessels with different branch structures.
Preferably, the angle of the distal tip of the distal filter basket 51 is 30 ° to 45 °, and the angle of the proximal tip of the proximal filter basket 52 is 30 ° to 45 °. When the distal and proximal filter hoppers 51, 52 adopt the above-described angles, the distal and proximal filter hoppers 51, 52 can better adapt to the shape of the blood vessel.
In addition, in some embodiments, at least one of the distal filter basket 51, the proximal filter basket 52 and the middle filter belt 53 is a filter mesh woven by a woven wire, and the woven wire may be a nickel titanium wire, a cobalt chromium wire or a platinum iridium wire. As shown in fig. 8, the far filter basket 51, the near filter basket 52 and the middle filter belt 53 are all filter screens woven from nickel titanium wires, but of course, it is also possible that only the far filter basket 51 and the near filter basket 52 are filter screens woven from woven wires, and the middle filter belt 53 is a filter membrane.
Specifically, the number of the filter screens per inch of mesh is between 30 and 150.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (12)
1. An intraoperative brain protection device having a catheter and a filtering structure connected to the catheter, the filtering structure having:
a distal filter connected to the distal section of the catheter and having a distal tip at the distal end and a distal mouth at the proximal end;
a proximal filter connected to the proximal section of the catheter and having a proximal tip at a proximal end and a proximal mouth at a distal end;
the middle filter belt is characterized in that the far end side of the middle filter belt is connected with the edge of the far bucket mouth, and the near end side of the middle filter belt is connected with the edge of the near bucket mouth.
2. The intraoperative brain protection device according to claim 1, further comprising a support structure coupled to the catheter, the support structure comprising:
the opening edge of the far bucket opening is connected and supported on the far supporting ring, the far supporting ring is provided with a far locking point and two far connecting points which are positioned at two sides of the far locking point at a certain distance, and the far supporting ring is connected at the position, close to the middle section, of the far section of the catheter by virtue of the far locking point;
the opening edge of the near bucket opening is connected and supported on the near supporting ring, the near supporting ring is provided with a near locking point and two near points which are positioned at two sides of the near locking point at a certain distance, and the near supporting ring is connected at the position, close to the middle section, of the near section of the catheter by the near locking point;
the far ends of the two middle supporting wires are respectively connected with two far-distance joints on the far supporting ring, the near ends of the two middle supporting wires are respectively connected with two near-distance joints on the near supporting ring, and the two belt sides of the middle filter belt are respectively connected and supported on the two middle supporting wires.
3. The intraoperative brain protection device according to claim 2, further comprising a locking structure for securing the filtering structure and the support structure to the catheter, the locking structure comprising, in order from distal end to proximal end:
a distal lock, said distal lock being sleeved over the distal section of said catheter and locking the distal tip of said distal filter cartridge to the distal section of said catheter;
the far ring lock is connected with a far lock point of the far support ring and sleeved at a position, close to the middle section, of the far section of the catheter, so that the far support ring is connected at the position, close to the middle section, of the far section of the catheter;
the proximal lock is connected with a proximal lock point of the proximal support ring and sleeved at a position, close to the middle section, of the proximal section of the catheter, so that the proximal support ring is connected at the position, close to the middle section, of the proximal section of the catheter;
and the proximal lock is sleeved on the proximal section of the catheter and locks the proximal tip of the proximal filter bucket on the proximal section of the catheter.
4. The intraoperative brain protection device according to claim 3, wherein,
the far-end lock, the near-end lock and the near-end lock are respectively provided with an axle center through hole, and the far-end lock, the near-end lock and the near-end lock are respectively fixedly sleeved on the far-end section, the far-end section near-middle section, the near-end section near-middle section and the near-end section of the catheter by virtue of the axle center through holes.
5. The intraoperative brain protection device according to claim 4, wherein
The intraoperative brain protection device further has: a bend-adjusting wire, the bend-adjusting wire being parallel to the catheter;
the far-end lock, the near-end lock and the near-end lock are respectively provided with a stay wire hole, the axes of the far-end lock, the near-end lock and the near-end lock are parallel and correspond to each other, the far end of the bending-adjusting stay wire is fixed in the stay wire holes of the far-end lock, and the near-end section of the bending-adjusting stay wire sequentially and movably passes through the stay wire holes of the near-end lock and the stay wire holes of the near-end lock.
6. The intraoperative brain protection device according to claim 1, wherein the intraoperative brain protection device further has a T-shaped guide head, the guide head having:
a column-shaped plug-in part connected with the distal end of the catheter;
the round table type head, the proximal end face of round table type head is greater than the distal end face of post type grafting portion, the distal end face of post type grafting portion is integrative to be connected in the proximal end face center of round table type head.
7. The intraoperative brain protection device according to claim 1, wherein,
the arc length of the connection between the edge of the far bucket opening and the far end side of the middle filter belt accounts for 30% -80% of the circumference of the edge of the whole far bucket opening;
the arc length of the connection between the edge of the near-bucket opening and the near-end side of the middle filter belt accounts for 30% -80% of the circumference of the edge of the whole near-bucket opening.
8. The intraoperative brain protection device according to claim 7, wherein,
the arc length of the connection between the edge of the far bucket opening and the far end side of the middle filter belt accounts for 45% -70% of the circumference of the edge of the whole far bucket opening;
the arc length of the connection between the edge of the near-bucket opening and the near-end side of the middle filter belt accounts for 45% -70% of the circumference of the edge of the whole near-bucket opening.
9. The intraoperative brain protection device according to claim 8, wherein,
the arc length of the connection between the edge of the far bucket opening and the far end side of the middle filter belt accounts for 50% -60% of the circumference of the edge of the whole far bucket opening;
the arc length of the connection between the edge of the near-bucket opening and the near-end side of the middle filter belt accounts for 50% -60% of the circumference of the edge of the whole near-bucket opening.
10. The intraoperative brain protection device according to claim 2, wherein,
the far filter bucket and the near filter bucket are both of conical structures; the far filter funnel, the near filter funnel and the middle filter belt are all filter films or filter screens.
11. The intraoperative brain protection device according to claim 2, wherein at least one of the distal filter funnel, the proximal filter funnel and the middle filter belt is a filter mesh woven by woven wires;
wherein the braided wire is nickel titanium wire, cobalt chromium wire or platinum iridium wire.
12. The intraoperative brain protection device according to claim 1, wherein,
the angle of the far tip of the far filter bucket is 30-45 degrees;
the angle of the near tip of the near filter bucket is 30-45 degrees;
and/or, the far end side of the middle filter belt is integrally connected with the edge of the far bucket mouth, and the near end side of the middle filter belt is integrally connected with the edge of the near bucket mouth;
and/or a plurality of developing rings are arranged on the guide pipe at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222436555.3U CN219250553U (en) | 2022-09-14 | 2022-09-14 | Intraoperative brain protection device |
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