CN217566450U - Far-end filter brain protection device for cardiac surgery - Google Patents
Far-end filter brain protection device for cardiac surgery Download PDFInfo
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- CN217566450U CN217566450U CN202221313633.4U CN202221313633U CN217566450U CN 217566450 U CN217566450 U CN 217566450U CN 202221313633 U CN202221313633 U CN 202221313633U CN 217566450 U CN217566450 U CN 217566450U
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Abstract
The utility model provides a far-end filter brain protection device used in the cardiac surgery, which comprises 1 sleeve with an inlet end and an outlet end; the casing is divided into 2-3 casing branches at the inlet end; the cannula contains 2-3 implant sheaths; introducing 1 of said implant sheaths from each cannula branch; the implantation sheaths are led out at the outlet end; a guide wire is arranged in the implantation sheath, and an umbrella-shaped filter screen device is arranged at the front end of the guide wire; the umbrella-shaped filter screen device is provided with a plurality of ultrasonic transmitting balls containing corner reflectors so as to enhance the ultrasonic reflection effect of the device. The distal filter brain protection device of the present application provides precise filter implantation and extraction for multiple blood vessels, particularly two carotid arteries, simultaneously during cardiac surgery, and the implantation and detailed procedure can be accomplished under ultrasound monitoring.
Description
The technical field is as follows:
the utility model relates to the technical field of medical equipment, in particular to a far-end filter brain protection device used in the cardiac surgery.
Background
Cerebral apoplexy is one of poor prognosis complications after the operation of a cardiac surgery patient, and the incidence rate is about: 3 to 10 percent. The death rate is as high as 38 percent. Stroke can occur intraoperatively, postoperatively (perioperatively), or as an advanced complication in patients with cardiac surgery.
Most strokes occur intraoperatively, with embolic events being the most likely risk factor. Embolization due to severe atherosclerotic aortic plaque and thrombus is closely associated with post-operative stroke. At present, no cardio-surgical intraoperative brain protection device is available on the market
The stroke risk factors in the cardiac surgery include: (1) Advanced age, peripheral arterial disease, hypertension, left ventricular dysfunction, inadequate antiplatelet therapy; (2) During clamping of the aorta, aortic cannula and proximal anastomosis, cardiac procedures or perioperative atrial fibrillation may lead to thrombus or plaque detachment; (3) Intraoperative hemodynamic abnormalities (hypotension, microembolism of platelet aggregation during extracorporeal circulation or turbulent blood flow).
The major source environments of emboli from cerebral embolism and stroke are in the heart, heart valves, aorta. When operating on these structures, for example: intubation on the aorta, repair of valves, and the like. Different sizes and species of emboli can be induced to form and fall, with subsequent embolic brain injury ranging from latent ischemic foci to massive and even fatal stroke. Various devices are known in the vasculature and carotid arteries to attempt to prevent emboli from escaping into the brain. However, these anti-embolic devices, which have not been widely accepted in cardiac surgery, the heart valves and aorta, due to their complexity and invasive nature with additional risk of trauma, known devices require the insertion of additional hardware into the arterial system or aorta, a known method, all risk related interventions within the blood vessel including aortic dissection, bleeding, thrombosis and carotid cerebral embolism and stroke.
Known intra-aortic filtration devices capture potential embolic material released from the heart by insertion of the ascending portion of the thoracic aorta of an aortic cannula. Another device for preventing emboli from entering the brain includes a porous circulatory deflector, a protective shield within the aortic vessel that captures or diverts potential emboli to the distal end. An additional device is also proposed for use during aortic valve surgery, being a catheter for the intra-aortic filter to capture emboli during this procedure. It has been determined that intravascular filters fail to capture embolic devices (currently 60-140 tm) smaller than the available pore size, resulting in cerebral microembolisation. Embolization may also occur due to poor apposition of the filter to the aortic or carotid walls. In addition, placement of the filter itself may create brain emboli. Thus, despite the multiple innovations in the field of 20 antithrombotic devices, the problem of cerebral embolism and stroke in cardiovascular surgery is far from being solved.
US patent No. 10537308B2 discloses an occlusion catheter apparatus and method for preventing embolic stroke, relating to an occlusion catheter having at least one balloon and a filtering mesh which is inserted into the patient's circulatory system to deflect, capture and remove emboli into the brain through the carotid artery, and a method for preventing embolic stroke in the subclavian artery during the occurrence of embolism.
Chinese patent CN208625921U discloses a thrombus protection device, which is composed of a guide wire with an umbrella-shaped filter screen, wherein the umbrella-shaped filter screen is supported on a Z-shaped framework, the umbrella-shaped filter screen is in an ellipsoidal structure, the upper part of the umbrella-shaped filter screen is a porous film, the lower part of the umbrella-shaped filter screen is in a blank structure, the head end of the guide wire is provided with a leading-in head, a developing mark is arranged between the leading-in head and the umbrella-shaped filter screen, and the tail part of the umbrella-shaped filter screen is also provided with a developing mark; the utility model discloses a thrombus protection device can implant in advance intervening in the treatment process, avoids the plaque to drop flow direction blood vessel of brain distal end, the emergence of reducible cerebral embolism.
The patent proposes to provide a visualization mark on the filter screen for pre-implantation during the interventional treatment of the thrombus protection device, but the specific structure and specific use method of the visualization mark are not explicitly disclosed.
Based on the above description of the prior art, it can be seen that the prior art discloses a device for implanting filters into multiple vessels simultaneously in the cardiovascular field, and the filter implantation positioning generally requires a harmful and complicated positioning method of contrast medium, X-ray and the like.
The above-mentioned not enough to prior art exists provides the utility model discloses the application.
SUMMERY OF THE UTILITY MODEL
The invention aims to provide a far-end filter brain protection device used in the cardiac surgery.
In order to realize the purpose of the utility model, the utility model provides a technical scheme is:
providing a distal filter brain protection device for use in cardiac surgery comprising 1 cannula having an inlet end and an outlet end; the casing is divided into 2-3 casing branches at the inlet end; the cannula contains 2-3 implant sheaths; introducing 1 of said implant sheaths from each cannula branch; the implantation sheaths are led out from the outlet end of the sleeve; each implanting sheath is internally provided with a guide wire, and the front end of the guide wire is provided with an umbrella-shaped filter screen device.
The cannula is a hollow pipeline, and the 2-3 implantation sheaths are accommodated in the hollow pipeline; or the cannula is a solid tube with 2-3 orifices therein, one orifice in each cannula branch, and 1 implant sheath in each orifice.
The sleeve is provided with a sleeve bending part, and the sleeve bending part is a telescopic steering structure formed by overlapping the outer wall of the sleeve.
The tail end of the branch of the sleeve is provided with a one-way valve.
The length of the sleeve is 10-100cm, and the diameter of the sleeve is 5-20 mm; the diameter of the guide wire is 0.1-0.5 mm; the implantation sheath has a diameter of 2-10 mm.
The umbrella-shaped filter screen device comprises a stopper arranged at the tail end of the guide wire; an umbrella-shaped filter screen; the support ring is arranged at the opening end part of the umbrella-shaped filter screen; a rotating pipe between the closed end of the umbrella-shaped filter screen and the stopper; one or more connecting wires connecting the retainer and the support ring.
The diameter of the umbrella-mounted filter screen is 4-12 mm after the umbrella-mounted filter screen is opened; the aperture of the umbrella-shaped filter screen is 100-120 microns; the umbrella-shaped filter screen is preferably made of polyurethane material.
The umbrella-shaped filter screen device further comprises a nose cone and a spring head end coil which are arranged outside the closed end part of the umbrella-shaped filter screen and are sequentially arranged in the direction away from the guide wire.
One or more metal ultrasonic positioning balls are arranged between the spring head end coil and the closed end of the umbrella-shaped filter screen, on the rotating pipe or between the retainer and the guide wire.
The ultrasonic positioning ball is provided with one or more corner reflectors for enhancing ultrasonic reflection signals, and the corner reflectors are recesses formed by vertically intersecting three planes in pairs.
The far-end filter brain protection device further comprises an ultrasonic transmitting head, an ultrasonic signal receiver, a signal processing device and a display device.
The distal filter brain protection device further comprises a guide wire twister.
The distal filter brain protection device further comprises an extraction sheath.
The ultrasonic transmitting head, the ultrasonic signal receiver, the signal processing device and the display device in the application can be arranged in the same system/device with the far-end filter brain protection device, and can be realized by using the ultrasonic transmitting head, the ultrasonic signal receiver, the signal processing device and the display device in other existing ultrasonic positioning systems.
The diameter of the ultrasonic positioning ball in the application is slightly larger than that of the rotating tube and the guide wire and smaller than that of the implantation sheath, the number of the corner reflector structures on the ultrasonic positioning ball is preferably at least 3, and a plurality of corner reflectors are uniformly distributed on the reflecting ball.
The length, diameter and turning part position of the sleeve in the application are designed according to the size of a common heart and adjacent blood vessels, and the sleeve can be customized before operation according to the special requirements of people such as children and blood vessel malformation.
The beneficial effects of the utility model are that:
(1) The structure formed by the bendable sleeve and the implantation sheaths provides accurate filter implantation and extraction for a plurality of blood vessels, particularly two carotid blood vessels, simultaneously and conveniently in cardiac surgery, and the protection effect and the operation convenience degree are superior to those of the existing device.
(2) The ultrasonic reflection effect is enhanced by arranging a plurality of ultrasonic positioning balls with corner reflectors in the device, so that the implantation and detailed operation process of the device can be completed under ultrasonic monitoring, and the operability and safety are obviously superior to those of the existing contrast agent and X-ray.
Drawings
Fig. 1 is a schematic view of the general structure of the present invention;
FIG. 2 is a schematic view of the umbrella-shaped filter net of the present invention;
fig. 3 is a schematic structural view of the ultrasonic locating ball of the present invention.
In the drawings: 1 is a guide wire, 2 is an umbrella-shaped filter screen, 3 is a support ring, 4 is a stopping device, 5 is a connecting wire, 6 is an ultrasonic positioning ball, 7 is a corner reflector, 8 is a nose cone, 9 is a spring head end coil, 10 is an implantation sheath, 11 is a sleeve, 11-1 is a sleeve bending part, 11-2 is a sleeve branch, 12 is a one-way valve, 13 is an umbrella-shaped filter screen device, 14 is a taking-out sheath, 15 is a guide wire twister, 16 is an ultrasonic transmitting head, 17 is an ultrasonic signal receiver 17, 18 is a signal processing device and a display device 18, 101 is a rotating tube.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Example 1
Fig. 1 is a general structural schematic diagram of the present invention, fig. 2 is a structural schematic diagram of an umbrella-shaped filter screen device of the present invention, fig. 3 is a structural schematic diagram of an ultrasonic positioning ball of the present invention, as shown in fig. 1, 2, and 3, a far-end filter brain protection device for use in cardiac surgery of the present invention, comprising:
1 casing 11 having an inlet end and an outlet end; the casing 11 is divided into 2-3 casing branches 11-2 at the inlet end; the cannula 11 contains 2-3 implant sheaths 10; introducing 1 of said implant sheaths 10 from each cannula branch 11-2; the implantation sheaths 10 are led out from the outlet end of the sleeve; each implantation sheath 10 is provided with a guide wire 1, and the front end of the guide wire 1 is provided with an umbrella-shaped filter screen device 13.
The cannula 11 is a hollow pipeline, and the 2-3 implantation sheaths 10 are accommodated in the hollow pipeline; or the cannula 11 is a solid tube with 2-3 openings therein, one opening in each cannula branch 11-2, and 1 implant sheath in each opening.
The sleeve 11 is provided with a sleeve bending part 11-1, and the sleeve bending part 11-1 is a telescopic steering structure formed by laminating the outer walls of the sleeves; so that the operation position for operating the implantation sheath/guide wire can be flexibly changed.
The cannula branch ends are fitted with one-way valves 12 to provide fixation of the implant sheath/guidewire during operation.
The length of the sleeve 11 is 10-100cm, and the diameter is 5-20 mm; the diameter of the guide wire is 0.1-0.5 mm; the implantation sheath has a diameter of 2-10 mm.
The cannula 11 has a length suitable for the intervention of the heart from the ascending aorta and, by suitable deflection of the curved portion 11-1 of the cannula, feeds 2 implant sheaths 10 into the left and right carotid arteries respectively to release the sieve at suitable portions in the left and right carotid arteries.
The umbrella-shaped filter screen device 13 comprises a stopper 4 arranged at the tail end of the guide wire 1; an umbrella-shaped filter screen 2; a support ring 3 arranged at the opening end part of the umbrella-shaped filter screen 2; a rotating pipe 101 between the closed end of the umbrella-shaped filter net 2 and the stopper; one or more connecting wires 5 connecting the retainer 4 and the support ring 3.
The diameter of the umbrella-mounted filter screen 2 is 4-12 mm after being opened; the aperture of the umbrella-shaped filter screen 2 is 100-120 microns; the umbrella-shaped filter screen 2 is made of polyurethane material.
The umbrella-shaped filter screen device 13 further comprises a nose cone 8 and a spring head end coil 9 which are arranged outside the closed end part of the umbrella-shaped filter screen 2 and are sequentially arranged away from the guide wire direction.
The umbrella-shaped filter screen 2 in the umbrella-shaped filter screen device 13 is stored and implanted in the sheath 10 when not used, after the sleeve 11 is placed at a proper position, the implantation sheath 10 is pushed forward to the position for placing the filter screen, the guide wire 1 is twisted by the guide wire twister 15 to push the umbrella-shaped filter screen device 13 out of the implantation sheath, the umbrella-shaped filter screen 2 is opened under the blood flow force, and the stopper 4 and the connecting wire 5 control the opening range of the umbrella-shaped filter screen 2. The nose cone 8 and the spring nose coil 9 serve to protect the vessel and aid in positioning during implantation. When the filter screen needs to be taken out, a taking-out sheath 14 with the diameter larger than that of the implantation sheath is sent in, and the umbrella-shaped filter screen device 13 is sleeved in and taken out.
One or more metallic ultrasonic locating balls 6 (not all possible positions shown in the drawings) are provided between the spring-head end coils and the closed end of the umbrella-shaped screen, on the rotating tube, or between the retainer and the guide wire. One or more corner reflectors 7 for enhancing ultrasonic reflection signals are arranged on the ultrasonic positioning ball 6, and the corner reflectors 7 are recesses formed by vertically intersecting three planes in pairs.
The far-end filter brain protection device also comprises an ultrasonic transmitting head 16, an ultrasonic signal receiver 17, a signal processing device and a display device 18, which are used for transmitting and receiving ultrasonic signals and presenting the ultrasonic signals on a screen in a visual way so as to guide the placement and removal process of the filter screen
The distal filter brain protection device also includes a guide wire twister 15.
The distal filter brain protection device also includes a removal sheath 14.
The embodiments described are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (13)
1. A distal filter brain protection device for use in cardiac surgery, comprising 1 cannula having an inlet end and an outlet end; the casing is divided into 2-3 casing branches at the inlet end; the cannula contains 2-3 implant sheaths; introducing 1 of said implant sheaths from each cannula branch; the implantation sheaths are led out from the outlet end of the sleeve; each implantation sheath is internally provided with a guide wire, and the front end of the guide wire in the direction of the outlet end of the sleeve is provided with an umbrella-shaped filter screen device.
2. The distal filter brain protection device of claim 1, wherein the cannula is a hollow tube, the 2-3 implant sheaths being contained in the hollow tube, 1 implant sheath per cannula branch; or the cannula is a solid tube with 2-3 orifices therein, one orifice in each cannula branch, and 1 implant sheath in each orifice.
3. The distal filter brain protection device of claim 1 or 2, wherein the sleeve is provided with a sleeve curved portion which is a telescopic steering structure formed by laminating outer walls of the sleeve.
4. A distal filter brain protection device according to claim 1 or 2, wherein the cannula branch ends are fitted with one-way valves.
5. A distal filter brain protection device according to claim 1 or 2, wherein the cannula has a length of 10-100cm and a diameter of 5-20 mm; the diameter of the guide wire is 0.1-0.5 mm; the implantation sheath has a diameter of 2-10 mm.
6. The distal filter brain protection device of claim 1 wherein the umbrella filter screen device comprises a stopper disposed at a distal end of a guide wire; an umbrella-shaped filter screen; the supporting ring is arranged at the opening end part of the umbrella-shaped filter screen; a rotating pipe between the closed end of the umbrella-shaped filter screen and the stopper; one or more connecting wires connecting the retainer and the support ring.
7. The distal filter brain protection device of claim 6, wherein the umbrella screen is 4-12 mm in diameter after being expanded; the aperture of the umbrella-shaped filter screen is 100-120 microns, and the umbrella-shaped filter screen is made of polyurethane materials.
8. The distal filter brain protection device of claim 6 or 7, wherein the umbrella screen assembly further comprises a nose cone and a spring nose coil disposed outside the closed end of the umbrella screen in sequence away from the guidewire.
9. The distal filter brain protection device of claim 8 wherein one or more metallic ultrasonic location balls are disposed between the spring tip coils and the closed end of the umbrella screen, on the rotating tube, or between the stopper and the guide wire.
10. The distal filter brain protection device of claim 9, wherein said ultrasound locator ball is provided with one or more corner reflectors for enhancing ultrasound reflection signals, said corner reflectors being recesses formed by the intersection of two perpendicular three planes.
11. The distal filter brain protection device of claim 1, wherein said distal filter brain protection device further comprises an ultrasound transmission head, an ultrasound signal receiver, a signal processing device, and a display device.
12. The distal filter brain protection device of claim 1 wherein the distal filter brain protection device further comprises a guidewire twister.
13. The distal filter brain protection device of claim 1 wherein the distal filter brain protection device further comprises a removal sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221313633.4U CN217566450U (en) | 2022-05-27 | 2022-05-27 | Far-end filter brain protection device for cardiac surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221313633.4U CN217566450U (en) | 2022-05-27 | 2022-05-27 | Far-end filter brain protection device for cardiac surgery |
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| Publication Number | Publication Date |
|---|---|
| CN217566450U true CN217566450U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221313633.4U Active CN217566450U (en) | 2022-05-27 | 2022-05-27 | Far-end filter brain protection device for cardiac surgery |
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| Country | Link |
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| CN (1) | CN217566450U (en) |
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- 2022-05-27 CN CN202221313633.4U patent/CN217566450U/en active Active
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