WO2020172729A1 - Microcatheter for endovascular intervention and protection - Google Patents
Microcatheter for endovascular intervention and protection Download PDFInfo
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- WO2020172729A1 WO2020172729A1 PCT/BR2020/000007 BR2020000007W WO2020172729A1 WO 2020172729 A1 WO2020172729 A1 WO 2020172729A1 BR 2020000007 W BR2020000007 W BR 2020000007W WO 2020172729 A1 WO2020172729 A1 WO 2020172729A1
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- Prior art keywords
- catheter
- balloon
- tube
- lumen
- distal end
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/104—Balloon catheters used for angioplasty
Definitions
- the present invention patent aims at a model of distal protection device for use in endovascular surgeries with the aim of improving efficiency and minimizing the deficiencies existing in other devices.
- embolic protection filters are the following: Angioguard - Cordis, Emboshield - Abbot, Microport - Chinese Patent Application CN 20497101; EZ - Boston US Patent Application US2Q11066177 and Australian Patent Application AU 2002255477; Spider - Japanese Patent Application JP20I11777550; Accunet - Medtronic, Lumen - US Patent Application US2013245669. All of them were initially created for use in coronary arteries, however it was verified that the use of filters is inadvisable and not authorized in several countries. As an example, the US regulatory agency (FDA) only authorizes its use in the carotid and saphenous veins of revascularized patients. The high rate of 'noreflow' contraindicated its use in coronary arteries.
- FDA US regulatory agency
- Flow blocking devices consist of adopting a reverse flow or occlusion and would have the advantage of preventing distal embolization by stopping or reversing the flow. However, it also prevents the arrival of blood and brain injuries due to hypoflow become more prevalent.
- Another drawback in this device is the caliber of its 9 to 10 French device, which is too wide for thinner and more delicate arteries such as the internal and external carotid arteries.
- the document US Patent US8079985 is one of them created by the company Invatec recently acquired by the company Medtronic.
- Said device has a balloon system for insufflation in common and external carotid arteries as proximal and non-distal occlusion devices, such as the referent patent in question, with high complexity of balloons without distal occlusion in the treated vessel, only one option in the collateral vessel.
- distal occlusors are Triactiv - Rensey Nash and Guardwire - Medtronic (International publication WO1997011735A1), which, however, are difficult to handle because they use helium gas and have a more complex system for insufflation of the distal balloon and thus occlude the treated vessel.
- Occlusion can cause injury due to lack of blood supply and often injuries to the treated artery due to the balloon being of the type to angioplasty with creation of aneurysms in vessels such as coronary arteries reported with the use of Medtronic Guardwire.
- Proximal flow blocking devices basically consist of a catheter that works with the reverse flow or occlusion principle.
- the flow reversal and proximal occlusion bases are devices that act mainly on carotids such as the Parodi system modified by the Gore company (US Patent US 79277347).
- One of its drawbacks is the associated venipuncture and the reversal of flow and the possibility of lesions due to hypoflow and or intolerance to it.
- Proxis US9101739, manufactured by St Jude Medical is a proximal occlusive device for use in coronary arteries for use in the USA only.
- the M.O.M.A. from Invatec with a balloon can also be used in this way.
- Figure IA - represents a distal end of the catheter of the present invention (2) with an inflated balloon (3) inserted in a delivery catheter (1).
- Figure 1B - represents a distal end of the catheter of the present invention (2) with an uninflated balloon (3) inserted in a delivery catheter (1).
- Figure 2A - represents a top side view of an intermediate segment of the catheter of the present invention (2), said intermediate segment comprising fenestras (4), said catheter (2) comprising two lumens (5, 6), an upper lumen (5) that connects at a certain point between 20cm to 90cm from the distal end where the balloon (3) is comprised with the fenestrations (4) in 90 ° transversal communication, referred to as a lumen (5) being used only for passage; blood, while the lower lumen (6) is used only to inflate the balloon (3).
- Figure 2B - represents a longitudinal sectional view of the catheter (2) of the present invention showing the upper and lower lumens (5, 6).
- Figure 2C - represents a cross-sectional view of the catheter (2) of the present invention showing the upper and lower lumens (5, 6).
- Figure 3A - represents a view of a variant of the catheter (2) of the present invention, with a tube (2.3) inserted in another tube (2.2), with a tube (2.2) having an internal diameter greater than the diameter the outer tube of the other tube (2.3), in which case the blood passage occurs in the space (8) between the outer surface of the smaller diameter tube (2.3) and the inner surface of the larger diameter tube (2.2), and the insufflation of the counter occurs through the passage of air through the light (7) of the tube (2.3).
- Figure 3B - represents a longitudinal sectional view of the catheter (2) of the present invention, in its second modality, showing the space (8) and the lumen (7),
- Figure 3C - represents a cross-sectional view of the catheter (2) of the present invention, in its second embodiment, showing the space (8), the lumen (7) and the tubes (2.2, 2.3).
- Figures 4A and 4B represent a view of the catheter (2) of the present invention comprising the balloon (3) inflated ( Figure 4A) and uninflated (4B), said balloon being disposed at a distal end of the catheter (2), the connector (9) being also shown in the same figures at the distal end opposite the distal end in which the balloon (3) is included, said connector (9) being used to control, by occlusion or opening, the lumen (6, 7 ) dedicated to the balloon.
- Figures A C and 4D - represents a view of the catheter (2) of the present invention comprising the balloon (3) inflated ( Figure 4C) and non-inflated (4D).
- Figures 5 to 15 - represent the preferred form of use of the catheter of the present invention, also showing an arrow that informs the direction of the blood flow in the artery section (21) represented in section in said figures.
- Figure 5 represents a section in section of an artery (21) with a typical obstruction (20) (atheromatous plaque) which, after undone, turns into a plunger (23) represented in Figures 11 to 14.
- a typical obstruction (20) atheromatous plaque
- Figure 6 represents the catheter (2) of the present invention with a balloon (3) at its distal end approaching the obstruction site (20) in the artery (2.1).
- the delivery catheter (1) is not shown in Figures 5 and 6 but is located in the vicinity of the represented artery section.
- Figure 7 represents a second stage of use, following Figure 6, when the balloon distal end (3) of the catheter (2) of the present invention goes beyond the obstructed site (20) to position itself, right after the point of obstruction, in the direction of blood flow.
- Figure 8 represents a third stage of use, following Figures 6 and 7, when the distal balloon end (3) of the catheter (2) of the present invention, already positioned after the obstruction site (20 ) in the direction of blood flow, inflates the balloon (3) interrupting blood flow.
- Figure 9 represents a fourth stage of. method of use, evidencing the entry of blood (22) in the fenestras (4) positioned in the catheter (2) of the present invention before the point of obstruction (20) of the artery (21) and the balloon (3) inflated after the point of obstruction (20) of the artery (21), also showing the exit of the blood (22) through the distal end of the balloon (3), maintaining the blood flow and at the same time blocking the flow in the region where the obstruction point is located (20) of the artery (21).
- Figure 10 represents the same elements in operation as Figure 9 plus a new stage of using the catheter of the present invention, which consists of the balloon-stent catheter assembly (10) to be positioned at the point of obstruction (20) of the artery ( 21).
- Figure 11 represents the same elements in operation as Figures 9 and 10 plus a new stage in the use of the catheter of the present invention, which consists of activating the balloon-stent catheter assembly (10) at the point of obstruction (20) of the artery (21) with the balloon of the balloon-stent catheter set (10) being inflated to position the stent and release the emboli (23).
- Figure 12 represents the same elements in operation as Figures 9, 10 and 11 plus a new stage of using the catheter of the present invention, which consists of positioning the stent by activating the balloon-stent catheter assembly (10) at the point of obstruction (20) of the artery (21) with the balloon of the balloon-stent catheter assembly (10) being deflated for removal of balloon-stent catheter (10).
- Figures 13 and 14 represent the stent and balloon elements (3) positioned and pistons (23), also showing the delivery catheter (1) that is positioned at the point where the stent stops. suck the plungers (23) as shown in Figure 13, and after suction of the plungers, the balloon (3) is deflated and blood flow is normalized.
- Figure 15 shows the delivery catheter (1) with the catheter (2) of the present invention retracted and the stent positioned at the point of obstruction (20) of the artery (21).
- the inventive step of the present invention consists of arranging fenestras (4) connected to a lumen (5) or passage (8) in the catheter (2) so that the blood circulation is not interrupted during the procedure to be performed in a given region of the artery extension (21) a, making it possible to use safe from a bai ⁇ o (3) occluder that isolates the region to be object of intervention and treatment,
- the present invention aims at a new endovascular protection device that consists of the creation of an efficient and temporary endovascular shunt, having as a basic principle for distal endovascular embolic protection and maintenance of arterial flow by temporary deviation at the site to be treated.
- This type of device is formed by a type of catheter (2).
- the apparatus of the present invention comprises a double lumen balloon catheter (2) which will serve as a temporary endovascular shunt and guide in centimeters (centimeter) after inflating the balloon to a second stent release catheter 'type' quick change '' adapted on the shunt.
- Said device consists of assembling microcatheters of different sizes and materials together that can be used in any type of endovascular surgery that uses the current endovaseular guides.
- the diameters of this set of suggested catheters are between 0.0010 to 0.0036, more specifically 0.0010 '', 0.0014 '', 0.0018 '' and 0.0036 '', compatible with currently existing endovascular guides.
- the materials in its composition can be nitinol, stainless steel, polyamides with reinforcement or any synthetic material used in the extrusion or new composite or isolated metallic alloy. It also includes any material currently used in the manufacture of endovascular catheters.
- the creation of the shunt follows the basic principles in traditional vascular surgery, adapted for endovascular surgery.
- the usefulness of this new type of device allows treatment in numerous regions in the human body such as renal, carotid, vertebral, coronary and arteries. others where you want to maintain the distal perfusion and perform procedures with minimal risk of distal embolization with the ease of being a guide and ruler simultaneously.
- the apparatus of the present invention comprises a catheter (2) with a balloon (3) inserted into a delivery catheter (1), said catheter of the present invention (2) comprising, in an intermediate segment , fenestras (4), said catheter (2) further comprising two lumens (5, 6), an upper lumen (5) that connects at a certain point, between 20cm to 90cm from the distal end where the balloon is included (3) , with the fenestras (4) in 90 ° transversal communication, referred to as a lumen (5) being used only for blood passage, while the lower lumen (6) is used only to inflate the balloon (3).
- the present invention also comprises an alternative embodiment of the catheter (2) of the present invention, with a tube (2.3) inserted in another tube (2.2), with the tube (2.2) having an internal diameter greater than the diameter the outer tube of the other tube (2.3), in which case the blood flow occurs in the space (8) between the outer surface of the smaller diameter tube (2.3) and the inner surface of the larger diameter tube (2.2), and the insufflation of the counter occurs through the passage of air through the light (7) of the tube (2.3).
- Said alternative modality comprising a delivery catheter (1) and a catheter (2) with a tube (2.3) inserted in another tube (2.2), the tube (2.3) has a balloon (3) in its distal end and the tube (2.2) comprises fenestras (4) in an intermediate segment.
- the catheter (2) of the present invention comprises a balloon (3) disposed at a distal end of said catheter (2), with a connector (9) disposed at the distal end still represented in the same figures. opposite the distal end in which the balloon (3) is included, referred to as connecting (9) being used to control, by occlusion or opening, the lumen (6, 7) dedicated to the balloon.
- the balloon (3) of the distal end is inflated with balloon (3), interrupting blood flow.
- blood (22) enters the fenestras (4) positioned in the catheter (2) of the present invention before the point of obstruction (20) of the artery (21) (the balloon (3) being inflated is positioned after the point of obstruction (20) of the artery (21)) and the exit of the same blood (22) through the distal end of the balloon (3), maintaining the blood flow and at the same time blocking the flow in the region where it is the obstruction point (20) of the artery (21) is located.
- a balloon-stent catheter set (10) is positioned at the point of obstruction (20) of the artery (21) that is activated with the balloon of the balloon-stent catheter set (10) being inflated to position the stent and piston release (23).
- the balloon of the balloon-stent catheter set (10) is deflated to remove the balloon-stent catheter (10), leaving only the stent and balloon (3j positioned and plungers (23), to be collected by the delivery catheter (1) which is positioned at the point where the stent is positioned to suck the plungers (23) as shown in Figure 13, and after the suction of the plungers the balloon (3) of the distal end of the catheter (2) of the present invention is deflated and blood flow is normalized.
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Abstract
Description
MICROCATETER PARA INTERVENÇÃO E PROTEÇÃO ENDOVASCULAR MICROCATETER FOR INTERVENTION AND ENDOVASCULAR PROTECTION
SUMÁRIO DA INVENÇÃO SUMMARY OF THE INVENTION
[0001] A presente patente de invenção tem por objetivo um modelo de aparelho de proteção distal para uso em cirurgias endovasculares com objetivo de melhorar a eficiência e minimizar as deficiências existentes em outros aparelhos . [0001] The present invention patent aims at a model of distal protection device for use in endovascular surgeries with the aim of improving efficiency and minimizing the deficiencies existing in other devices.
ANTECEDENTES DA INVENÇÃO BACKGROUND OF THE INVENTION
[0002] Já são conhecidos outros aparelhos de proteção do tipo distal como os filtros de proteção cerebral que funcionam como uma peneira, filtrando e prevenindo a liberação de debris. [0002] Other protective devices of the distal type are already known, such as brain protection filters that work as a sieve, filtering and preventing the release of debris.
[0003] Apesar de serem utilizados em grande escala, os filtros de proteção seguem os princípios da peneíração para impedir que os debris atinjam a circulação cerebral ou distal. Entretanto, devido a permanecerem livres na luz vascular possibilitam a liberação de êmbolos (pela instabilidade do aparelho) , lesões no endotélio vascular por trauma direto da movimentação do filtro e o mecanismo de 'vasoespamo', impedindo o fluxo pela sua simples presença e contato. Outra deficiência é de rapidamente ficarem cheios, impedindo a passagem de sangue não filtrando e sim ocluindo. [0003] Despite being used on a large scale, protective filters follow the principles of penetration to prevent debris from reaching the cerebral or distal circulation. However, due to remaining free in the vascular lumen, they allow the release of emboli (due to the instability of the device), lesions in the vascular endothelium by direct trauma of the filter movement and the 'vasospamous' mechanism, preventing the flow through its simple presence and contact. Another deficiency is that they quickly become full, preventing the passage of blood, not filtering but occluding.
[0004] Os filtros de proteção embólica maís conhecidos são os seguintes: Angioguard - Cordis, Emboshield - Abbot, Microport - Pedido de Patente Chinesa CN 20497101; EZ - Boston Pedido de Patente Norte-Americana US2Q11066177 e Pedido de Patente Australiana AU 2002255477; Spider - Pedido de Patente Japonesa JP20I11777550; Accunet - Medtronic, Lumen - Pedido de Patente Norte-Americana US2013245669. Todos foram criados inicialmente para utilização em coronárias, sendo verificado entretanto que o uso dos filtros é desaconselhável e não autorizado em diversos países. Como exemplo, o órgão regulatório nos EUA (FDA) autoriza somente seu uso em carótidas e em safenas de pacientes revascularizados . 0 alto índice de 'noreflow' contra indicou seu uso em coronárias. [0004] The most well-known embolic protection filters are the following: Angioguard - Cordis, Emboshield - Abbot, Microport - Chinese Patent Application CN 20497101; EZ - Boston US Patent Application US2Q11066177 and Australian Patent Application AU 2002255477; Spider - Japanese Patent Application JP20I11777550; Accunet - Medtronic, Lumen - US Patent Application US2013245669. All of them were initially created for use in coronary arteries, however it was verified that the use of filters is inadvisable and not authorized in several countries. As an example, the US regulatory agency (FDA) only authorizes its use in the carotid and saphenous veins of revascularized patients. The high rate of 'noreflow' contraindicated its use in coronary arteries.
[0005] Os aparelhos de bloqueio de fluxos consistem na adoção de um fluxo reverso ou oclusor e teriam a vantagem de impedir a ernbolização distal por parada ou reversão do fluxo. Entretanto impede também a chegada de sangue e lesões cerebrais por hipofluxo tornam-se maís prevalentes. Um outro inconveniente nesse dispositivo é o calibre do seu aparelho de 9 a 10 francês muito largo para artérias mais finas e delicadas como a carótida interna e externa. 0 documento Patente Norte-Americana US8079985 é um deles criado pela empresa Invatec recentemente adquirida pela empresa Medtronic. 0 referido dispositivo possui um sistema de balões para insuflação em carótida comum e externa como dispositivos de oclusão proximal e não distal, como a referente patente em questão, com alta complexidade de balões sem oclusão distal no vaso tratado, somente uma opção no vaso colateral. Exemplos de oclusores distals são Triactiv - Rensey Nash e Guardwire - Medtronic (Publicação internacional WO1997011735A1) que, entretanto, são de difícil manuseio por utilizarem gás hélio e por possuírem um sistema de maior complexidade para insuflação do balão distal e assim ocluem o vaso tratado. A oclusão pode causar lesão por falta de aporte sanguíneo e muitas vezes lesões na artéria tratada devido ao balão ser do tipo para angioplastia com criação de aneurismas em vasos como coronárias relatados com uso do Guardwire da Medtronic. [0005] Flow blocking devices consist of adopting a reverse flow or occlusion and would have the advantage of preventing distal embolization by stopping or reversing the flow. However, it also prevents the arrival of blood and brain injuries due to hypoflow become more prevalent. Another drawback in this device is the caliber of its 9 to 10 French device, which is too wide for thinner and more delicate arteries such as the internal and external carotid arteries. The document US Patent US8079985 is one of them created by the company Invatec recently acquired by the company Medtronic. Said device has a balloon system for insufflation in common and external carotid arteries as proximal and non-distal occlusion devices, such as the referent patent in question, with high complexity of balloons without distal occlusion in the treated vessel, only one option in the collateral vessel. Examples of distal occlusors are Triactiv - Rensey Nash and Guardwire - Medtronic (International publication WO1997011735A1), which, however, are difficult to handle because they use helium gas and have a more complex system for insufflation of the distal balloon and thus occlude the treated vessel. Occlusion can cause injury due to lack of blood supply and often injuries to the treated artery due to the balloon being of the type to angioplasty with creation of aneurysms in vessels such as coronary arteries reported with the use of Medtronic Guardwire.
[0006] Os aparelhos de bloqueio de fluxos proximal consistem basicamente num cateter que funciona com o principio de fluxo reverso ou oclusor. [0006] Proximal flow blocking devices basically consist of a catheter that works with the reverse flow or occlusion principle.
[0007] As bases de reversão do fluxo e oclusão proxiraal são aparelhos que atuam principalmente em carótidas como o sistema de Parodi modificado pela empresa Gore (Patente Norte-Americana US 79277347) . Um de seus inconvenientes é a punção venosa associada e a reversão do fluxo e possibilidade de lesões por hipofluxo e ou intolerância ao mesmo. O Proxis US9101739, fabricado por St Jude Medicai, é um dispositivo oclusor proximal para uso em coronárias cora uso somente nos EUA. O M.O.M.A. da Invatec com um balão também pode ser utilizado desta forma. [0007] The flow reversal and proximal occlusion bases are devices that act mainly on carotids such as the Parodi system modified by the Gore company (US Patent US 79277347). One of its drawbacks is the associated venipuncture and the reversal of flow and the possibility of lesions due to hypoflow and or intolerance to it. Proxis US9101739, manufactured by St Jude Medical, is a proximal occlusive device for use in coronary arteries for use in the USA only. The M.O.M.A. from Invatec with a balloon can also be used in this way.
DESCRIÇÃO DA INVENÇÃO DESCRIPTION OF THE INVENTION
[0008] Tendo era vista todos estes inconvenientes supracitados e cora o propósito de possibilitar a realização de procedimentos endovasculares com a segurança devida e necessária foi desenvolvido um novo aparelho de proteção endovascular que consiste na criação de um shunt endovascular eficiente e temporário, tendo como princípio básico para proteção embólica endovascular distal e manutenção do fluxo arterial por desvio temporário no local a ser tratado. Esse tipo de dispositivo é formado por um tipo de cateter que dependendo do tipo de cirurgia endovascular poder ser utilizado sem intercorrêncía . [0008] In view of all of the aforementioned inconveniences and with the purpose of enabling endovascular procedures to be carried out with due and necessary safety, a new endovascular protection device was developed, which consists of creating an efficient and temporary endovascular shunt, based on the principle basic for distal endovascular embolic protection and maintenance of arterial flow by temporary deviation at the site to be treated. This type of device is formed by a type of catheter that, depending on the type of endovascular surgery, can be used without intercurrence.
DESCRIÇÃO DAS FIGURAS DESCRIPTION OF THE FIGURES
[0009] Figura IA - representa uma extremidade distal do cateter da presente invenção (2) com balão insuflado (3) inserido em cateter de entrega (1 ) . [00010] Figura 1B - representa uma extremidade distal do cateter da presente invenção (2) com balão não insuflado (3) inserido em cateter de entrega (1). [0009] Figure IA - represents a distal end of the catheter of the present invention (2) with an inflated balloon (3) inserted in a delivery catheter (1). [00010] Figure 1B - represents a distal end of the catheter of the present invention (2) with an uninflated balloon (3) inserted in a delivery catheter (1).
[00011] Figura 2A - representa uma vista superior lateral de um segmento intermediário do cateter da presente invenção (2) , referido segmento intermediário compreendendo fenestras (4) , referido cateter (2) compreendendo dois lumens (5, 6), um lumem superior(5) que se conecta em um determinado ponto entre 20cm a 90cm da extremidade distal aonde está compreendido o balão (3) com as fenestras (4) em comunicação transversal de 90°, referido lumem (5) sendo utilizado tão somente para passagem; sanguínea, enquanto que o lumem inferior (6) é utilizado tão somente para insuflar o balão (3 ) . [00011] Figure 2A - represents a top side view of an intermediate segment of the catheter of the present invention (2), said intermediate segment comprising fenestras (4), said catheter (2) comprising two lumens (5, 6), an upper lumen (5) that connects at a certain point between 20cm to 90cm from the distal end where the balloon (3) is comprised with the fenestrations (4) in 90 ° transversal communication, referred to as a lumen (5) being used only for passage; blood, while the lower lumen (6) is used only to inflate the balloon (3).
[00012] Figura 2B - representa uma vista em corte longitudinal do cateter (2) da presente invenção evidenciando os lumens superior e inferior (5, 6). [00012] Figure 2B - represents a longitudinal sectional view of the catheter (2) of the present invention showing the upper and lower lumens (5, 6).
[00013] Figura 2C - representa uma vista em corte transversal do cateter (2) da presente invenção evidenciando os lumens superior e inferior (5, 6) . [00013] Figure 2C - represents a cross-sectional view of the catheter (2) of the present invention showing the upper and lower lumens (5, 6).
[00014] Figura 3A - representa uma vista de uma variante do cateter (2) da presente invenção, com um tubo (2.3) inserto em um outro tubo (2.2), sendo que um tubo (2.2) possuí diâmetro interno maior que o diâmetro externo do outro tubo (2.3), sendo que nesta modalidade a passagem sanguínea se dá no espaço (8) compreendido entre a superfície externa do tubo de diâmetro menor (2.3) e a superfície interna do tubo de diâmetro maior (2.2), e a insuflação do balcão se dá mediante passagem de ar pelo lumem (7) do tubo (2.3) . [00015] Figura 3B - representa uma vista em corte longitudinal do cateter (2) da presente invenção, em sua segunda modalidade, evidenciando o espaço (8) e o lumem(7), [00014] Figure 3A - represents a view of a variant of the catheter (2) of the present invention, with a tube (2.3) inserted in another tube (2.2), with a tube (2.2) having an internal diameter greater than the diameter the outer tube of the other tube (2.3), in which case the blood passage occurs in the space (8) between the outer surface of the smaller diameter tube (2.3) and the inner surface of the larger diameter tube (2.2), and the insufflation of the counter occurs through the passage of air through the light (7) of the tube (2.3). [00015] Figure 3B - represents a longitudinal sectional view of the catheter (2) of the present invention, in its second modality, showing the space (8) and the lumen (7),
[00016] Figura 3C - representa uma vista em corte transversal do cateter(2) da presente invenção, em sua segunda modalidade, evidenciando o espaço (8), o lumem (7 ) e os tubos (2.2, 2.3). [00016] Figure 3C - represents a cross-sectional view of the catheter (2) of the present invention, in its second embodiment, showing the space (8), the lumen (7) and the tubes (2.2, 2.3).
[00017] Figuras 4A e 4B representa uma vista do cateter(2) da presente invenção compreendendo o balão (3) insuflado (Figura 4A) e não insuflado (4B) , referido balão estando disposto em uma extremidade distal do cateter (2), sendo ainda representado nas mesmas figuras o conector(9) disposto na extremidade distal oposta à extremidade distal em que está compreendido o balão (3), referido conector (9) sendo utilizado para controle, por oclusão ou abertura, do lumem (6, 7) dedicado ao balão. [00017] Figures 4A and 4B represent a view of the catheter (2) of the present invention comprising the balloon (3) inflated (Figure 4A) and uninflated (4B), said balloon being disposed at a distal end of the catheter (2), the connector (9) being also shown in the same figures at the distal end opposite the distal end in which the balloon (3) is included, said connector (9) being used to control, by occlusion or opening, the lumen (6, 7 ) dedicated to the balloon.
[00018] Figuras A C e 4D - representa uma vísta do cateter(2) da presente invenção compreendendo o balão (3) insuflado (Figura 4C) e não insuflado (4D) . [00018] Figures A C and 4D - represents a view of the catheter (2) of the present invention comprising the balloon (3) inflated (Figure 4C) and non-inflated (4D).
[00019] Figuras 5 a 15 - representam a forma de utilização preferida do cateter da presente invenção, evidenciando ainda uma seta que informa o sentido do fluxo sanguíneo na seção de artéria (21) representada em corte nas referidas figuras. [00019] Figures 5 to 15 - represent the preferred form of use of the catheter of the present invention, also showing an arrow that informs the direction of the blood flow in the artery section (21) represented in section in said figures.
[00020] A Figura 5 representa uma seção em corte de uma artéria (21) com uma obstrução (20 ) típica (placa de ateroma) que, após desfeita, se transforma em embolo (23) representados nas Figuras 11 a 14. [00020] Figure 5 represents a section in section of an artery (21) with a typical obstruction (20) (atheromatous plaque) which, after undone, turns into a plunger (23) represented in Figures 11 to 14.
[00021] A Figura 6 representa o cateter (2) da presente invenção com balão (3) em sua extremidade distal se aproximando do local da obstrução (20) na artéria (2.1). [00022] 0 cateter de entrega (1) não está representado nas Figuras 5 e 6 mas encontra-se localizado nas imediações da seção de artéria representada. [00021] Figure 6 represents the catheter (2) of the present invention with a balloon (3) at its distal end approaching the obstruction site (20) in the artery (2.1). [00022] The delivery catheter (1) is not shown in Figures 5 and 6 but is located in the vicinity of the represented artery section.
[00023] A Figura 7 representa um segundo estágio da forma de utilização, na sequência da Figura 6, quando a extremidade distal com balão (3) do cateter (2) da presente invenção ultrapassa o local com obstrução (20) para se posicionar, logo após o ponto de obstrução, no sentido do fluxo sanguíneo. [00023] Figure 7 represents a second stage of use, following Figure 6, when the balloon distal end (3) of the catheter (2) of the present invention goes beyond the obstructed site (20) to position itself, right after the point of obstruction, in the direction of blood flow.
[00024 ] A Figura 8 representa um terceiro estágio da forma de utilização, na sequência das Figuras 6 e 7, quando a extremidade distal com balão (3) do cateter (2) da presente invenção, já posicionada após o local com obstrução (20) no sentido do fluxo sanguíneo, infla o balão (3) interrompendo o fluxo sanguíneo. [00024] Figure 8 represents a third stage of use, following Figures 6 and 7, when the distal balloon end (3) of the catheter (2) of the present invention, already positioned after the obstruction site (20 ) in the direction of blood flow, inflates the balloon (3) interrupting blood flow.
[00025] A Figura 9 representa um quarto estágio da. forma de utilização, evidenciando a entrada do sangue (22) nas fenestras(4) posicionadas no cateter (2) da presente invenção antes do ponto de obstrução (20 ) da artéria (21) e o balão (3) insuflado após o ponto de obstrução (20) da artéria (21), evidenciando ainda a saída do sangue (22) pela extremidade distal do balão (3), mantendo-se o fluxo sanguíneo e ao mesmo tempo interditando o fluxo na região aonde está localizado o ponto de obstrução (20 ) da artéria (21) . [00025] Figure 9 represents a fourth stage of. method of use, evidencing the entry of blood (22) in the fenestras (4) positioned in the catheter (2) of the present invention before the point of obstruction (20) of the artery (21) and the balloon (3) inflated after the point of obstruction (20) of the artery (21), also showing the exit of the blood (22) through the distal end of the balloon (3), maintaining the blood flow and at the same time blocking the flow in the region where the obstruction point is located (20) of the artery (21).
[00026] A Figura 10 representa os mesmos elementos em operação da Figura 9 acrescido de nova etapa da utilização do cateter da presente invenção que consiste no conjunto cateter balão-stent (10) a ser posicionado no ponto de obstrução (20) da artéria (21) . [00027] A Figura 11 representa os mesmos elementos em operação das Figuras 9 e 10 acrescido de nova etapa da utilização do cateter da presente invenção que consiste no acionamento do conjunto cateter balão-stent (10) no ponto de obstrução (20 ) da artéria (21) com o balão do conjunto cateter balão-stent (10) sendo insuflado para posicionamento do stent e liberação dos êmbolos (23). [00026] Figure 10 represents the same elements in operation as Figure 9 plus a new stage of using the catheter of the present invention, which consists of the balloon-stent catheter assembly (10) to be positioned at the point of obstruction (20) of the artery ( 21). [00027] Figure 11 represents the same elements in operation as Figures 9 and 10 plus a new stage in the use of the catheter of the present invention, which consists of activating the balloon-stent catheter assembly (10) at the point of obstruction (20) of the artery (21) with the balloon of the balloon-stent catheter set (10) being inflated to position the stent and release the emboli (23).
[00028] A Figura 12 representa os mesmos elementos em operação das Figuras 9, 10 e 11 acrescido de nova etapa da utilização do cateter da presente invenção que consiste no posicionamento do stent pelo acionamento do conjunto cateter balão-stent (10) no ponto de obstrução (20) da artéria (21) com o balão do conjunto cateter balão-stent (10) sendo desinflado para retirada cateter balão-stent (10) . [00028] Figure 12 represents the same elements in operation as Figures 9, 10 and 11 plus a new stage of using the catheter of the present invention, which consists of positioning the stent by activating the balloon-stent catheter assembly (10) at the point of obstruction (20) of the artery (21) with the balloon of the balloon-stent catheter assembly (10) being deflated for removal of balloon-stent catheter (10).
[00029] As Figuras 13 e 14 representam os elementos stent e balão (3) posicionados e êmbolos (23), evidenciando ainda o cateter de entrega (1) que é posicionado no ponto aonde se encontra posicionado o stent para. sugar os êmbolos (23) conforme Figura 13, sendo que após a sucção dos êmbolos o balão (3) é desinflado e é normalizado o fluxo sanguíneo. [00029] Figures 13 and 14 represent the stent and balloon elements (3) positioned and pistons (23), also showing the delivery catheter (1) that is positioned at the point where the stent stops. suck the plungers (23) as shown in Figure 13, and after suction of the plungers, the balloon (3) is deflated and blood flow is normalized.
[00030] A Figura 15 evidencia o cateter de entrega (1) já com o cateter (2) da presente invenção recolhido e o stent posicionado no ponto de obstrução (20) da artéria (21). [00030] Figure 15 shows the delivery catheter (1) with the catheter (2) of the present invention retracted and the stent positioned at the point of obstruction (20) of the artery (21).
DESCRIÇÃO DA INVENÇÃO DESCRIPTION OF THE INVENTION
[00031] O passo inventivo da presente invenção consiste em dispor fenestras(4) ligadas a um Iumem(5) ou passagem(8) no cateter (2) a fim de que a circulação sanguínea não seja interrompida durante o procedimento a ser executado em uma determinada região da extensão da artéria (21) a, possibilitando com essa forma construtiva a utilização segura de um baião (3) oclusor que isola a região a ser objeto de intervenção e tratamento, [00031] The inventive step of the present invention consists of arranging fenestras (4) connected to a lumen (5) or passage (8) in the catheter (2) so that the blood circulation is not interrupted during the procedure to be performed in a given region of the artery extension (21) a, making it possible to use safe from a baião (3) occluder that isolates the region to be object of intervention and treatment,
[00032] Destarte, a presente invenção tem por objeto um novo aparelho de proteção endovascular que consiste na criação de um shunt endovascular eficiente e temporário, tendo como principio básico para proteção embólica endovascular distal e manutenção do fluxo arterial por desvio temporário no local a ser tratado. Esse tipo de dispositivo é formado por um tipo de cateter (2). [00032] Thus, the present invention aims at a new endovascular protection device that consists of the creation of an efficient and temporary endovascular shunt, having as a basic principle for distal endovascular embolic protection and maintenance of arterial flow by temporary deviation at the site to be treated. This type of device is formed by a type of catheter (2).
[00033] O aparelho da presente invenção, por sua vez, compreende um cateter (2) do tipo balão duplo lumen que servirá de shunt endovascular temporário e guia em centímetros (centimetrada) após insuflar o balão para um segundo cateter de liberação do 'stent' do tipo 'troca rápida'' adaptado sobre o shunt. [00033] The apparatus of the present invention, in turn, comprises a double lumen balloon catheter (2) which will serve as a temporary endovascular shunt and guide in centimeters (centimeter) after inflating the balloon to a second stent release catheter 'type' quick change '' adapted on the shunt.
[00034] Dessa forma resolvera-se seis problemas recorrentes: instabilidade do aparelho, trauma direto, perfil (calibre) arterial, vasoespasmo, lesões por hipofluxo ou oclusão e embolização distal. Por ser centimetrado, o cateter ê ainda utilizado simultaneamente como régua e guia propriamente dita, [00034] In this way, six recurrent problems were resolved: instability of the device, direct trauma, arterial profile (caliber), vasospasm, lesions due to hypoflow or occlusion and distal embolization. Because it is centimeter-sized, the catheter is still used simultaneously as a ruler and guide itself,
[00035] Referido dispositivo é constituído mediante a montagem em conjunto de microcateteres de diferentes tamanhos e materiais que podem ser utilizados em qualquer tipo de cirurgia endovascular que utilize as atuais guias endovaseulares . [00035] Said device consists of assembling microcatheters of different sizes and materials together that can be used in any type of endovascular surgery that uses the current endovaseular guides.
[00036] Inicialmente os diâmetros desse conjunto de cateteres sugeridos são de entre 0.0010 a 0,0036, mais especifícamente de 0.0010'', 0.0014'', 0.0018'' e 0.0036'', compatíveis com as guias endovasculares atualmente existentes . [00037] Os materiais em sua composição podem ser o nitinol, aço inoxidável, poliamidas com reforço ou qualquer material sintético usado na extrusão ou nova liga metálica composta ou isolada. Inclui-se também qualquer material utilizado atualmente na confecção de cateteres endovasculares . [00036] Initially the diameters of this set of suggested catheters are between 0.0010 to 0.0036, more specifically 0.0010 '', 0.0014 '', 0.0018 '' and 0.0036 '', compatible with currently existing endovascular guides. [00037] The materials in its composition can be nitinol, stainless steel, polyamides with reinforcement or any synthetic material used in the extrusion or new composite or isolated metallic alloy. It also includes any material currently used in the manufacture of endovascular catheters.
[00038] A criação do shunt segue os princípios básicos na cirurgia vascular tradicional, adaptado para a cirurgia endovascular . A utilidade deste novo tipo de dispositivo permite o tratamento em inúmeras regiões no corpo humano como artérias renais, carótidas, vertebrais, coronárias e. outras onde se deseja manter a perfusão distal e realizar procedimentos com minímo risco de embolizaçâo distal com a facilidade de ser um guia e régua simultaneamente. [00038] The creation of the shunt follows the basic principles in traditional vascular surgery, adapted for endovascular surgery. The usefulness of this new type of device allows treatment in numerous regions in the human body such as renal, carotid, vertebral, coronary and arteries. others where you want to maintain the distal perfusion and perform procedures with minimal risk of distal embolization with the ease of being a guide and ruler simultaneously.
DESCRIÇÃO DETALHADA DA INVENÇÃO DETAILED DESCRIPTION OF THE INVENTION
[00039] Conforme mostrado nas figuras em anexo, o aparelho da presente invenção compreende um cateter(2) com balão (3) inserido em cateter de entrega (1), o referido cateter da presente invenção (2) compreendendo, em um segmento intermediário, fenestras (4) , referido cateter (2) compreendendo ainda dois lumens(5, 6), um lumem superior (5) que se conecta em um determinado ponto, entre 20cm a 90cm da extremidade distal aonde está compreendido o balão (3), com as fenestras (4) em comunicação transversal de 90°, referido lumem (5) sendo utilizado tão somente para passagem sanguínea, enquanto que o lumem inferior (6) é utilizado tão somente para insuflar o balão (3). [00039] As shown in the attached figures, the apparatus of the present invention comprises a catheter (2) with a balloon (3) inserted into a delivery catheter (1), said catheter of the present invention (2) comprising, in an intermediate segment , fenestras (4), said catheter (2) further comprising two lumens (5, 6), an upper lumen (5) that connects at a certain point, between 20cm to 90cm from the distal end where the balloon is included (3) , with the fenestras (4) in 90 ° transversal communication, referred to as a lumen (5) being used only for blood passage, while the lower lumen (6) is used only to inflate the balloon (3).
[00040] A presente invenção compreende ainda uma modalidade alternativa do cateter (2) da presente invenção, com um tubo (2.3) inserto em um outro tubo (2.2), sendo que o tubo (2.2) possui diâmetro interno maior que o diâmetro externo do outro tubo (2.3), sendo que nesta modalidade a passagem sanguínea se dá no espaço (8) compreendido entre a superfície externa do tubo de diâmetro menor (2.3) e a superfície interna do tubo de diâmetro maior (2.2), e a insuflação do balcão se dá mediante passagem de ar pelo lumem(7) do tubo (2.3). [00040] The present invention also comprises an alternative embodiment of the catheter (2) of the present invention, with a tube (2.3) inserted in another tube (2.2), with the tube (2.2) having an internal diameter greater than the diameter the outer tube of the other tube (2.3), in which case the blood flow occurs in the space (8) between the outer surface of the smaller diameter tube (2.3) and the inner surface of the larger diameter tube (2.2), and the insufflation of the counter occurs through the passage of air through the light (7) of the tube (2.3).
[00041] Referida modalidade alternativa compreendendo um cateter de entrega (1) e um cateter (2) com um tubo (2.3) inserto em um outro tubo (2.2), o tubo (2,3) possui um balão (3) em sua extremidade distal e o tubo (2.2) compreende fenestras(4) em um segmento intermediário. [00041] Said alternative modality comprising a delivery catheter (1) and a catheter (2) with a tube (2.3) inserted in another tube (2.2), the tube (2.3) has a balloon (3) in its distal end and the tube (2.2) comprises fenestras (4) in an intermediate segment.
[00042] Conforme também evidenciado nas figuras, o cateter (2) da presente invenção compreende um balão (3) disposto em uma extremidade distal do referido cateter (2), sendo ainda representado nas mesmas figuras um conector(9) disposto na extremidade distal oposta à extremidade distal em que está compreendido o balão (3), referido conectar (9) sendo utilizado para controle, por oclusão ou abertura, do lumem(6, 7) dedicado ao balão. [00042] As also shown in the figures, the catheter (2) of the present invention comprises a balloon (3) disposed at a distal end of said catheter (2), with a connector (9) disposed at the distal end still represented in the same figures. opposite the distal end in which the balloon (3) is included, referred to as connecting (9) being used to control, by occlusion or opening, the lumen (6, 7) dedicated to the balloon.
[00043] Conforme mostrado nas Figuras 5 a 15, que ilustram a utilização do cateter da presente invenção, resta claro ser o aparelho da presente invenção novo e inovador. [00043] As shown in Figures 5 to 15, which illustrate the use of the catheter of the present invention, it remains clear that the apparatus of the present invention is new and innovative.
[00044] A utilização do mesmo se dá pela disposição da extremidade distal com balão (3) do cateter (2) da presente invenção, apôs ultrapassar o local com obstrução (20) para se posicionar, logo após o ponto de obstrução e em local apropriado, no sentido do fluxo sanguíneo. [00044] The use of the same occurs by the disposition of the distal balloon end (3) of the catheter (2) of the present invention, after overcoming the obstructed site (20) to position itself, right after the obstruction point and in a location appropriate, in the direction of blood flow.
[00045] Com o posicionamento do cateter (2) após o local com obstrução (20 ) no sentido do fluxo sanguíneo, é inflado o balão (3) da extremidade distal com balão (3), interrompendo o fluxo sanguíneo. Com a dita interrupção, ocorre a entrada do sangue (22) nas fenestras (4) posicionadas no cateter (2) da presente invenção antes do ponto de obstrução (20) da artéria (21) (sendo que o balão (3) insuflado está posicionado após o ponto de obstrução (20) da artéria (21) ) e a saída do mesmo sangue (22) pela extremidade distal do balão (3), mantendo-se o fluxo sanguíneo e ao mesmo tempo interditando o fluxo na região aonde está localizado o ponto de obstrução (20) da artéria (21). [00045] With the positioning of the catheter (2) after the site with obstruction (20) in the direction of blood flow, the balloon (3) of the distal end is inflated with balloon (3), interrupting blood flow. With said interruption, blood (22) enters the fenestras (4) positioned in the catheter (2) of the present invention before the point of obstruction (20) of the artery (21) (the balloon (3) being inflated is positioned after the point of obstruction (20) of the artery (21)) and the exit of the same blood (22) through the distal end of the balloon (3), maintaining the blood flow and at the same time blocking the flow in the region where it is the obstruction point (20) of the artery (21) is located.
[00046] Após, é posicionado um conjunto cateter balão- stent (10) no ponto de obstrução (20) da artéria (21) que é acionado com o balão do conjunto cateter balão-stent (10) sendo insuflado para posicionamento do stent e liberação dos êmbolos (23). Posicionado o stent pelo acionamento do conjunto cateter balão-stent ( 10) no ponto de obstrução (20 ) da artéría(21), o balão do conjunto cateter balão-stent (10) é desinflado para retirada cateter balão-stent (10) , ficando somente o stent e balão (3j posicionados e êmbolos (23), a serem recolhidos pelo cateter de entrega (1) que é posicionado no ponto aonde se encontra posicionado o stent para sugar os êmbolos (23) conforme Figura 13, sendo que após a sucção dos êmbolos o balão (3) da extremidade distal do cateter (2) da presente invenção é desinflado e é normalizado o fluxo sanguíneo. [00046] Afterwards, a balloon-stent catheter set (10) is positioned at the point of obstruction (20) of the artery (21) that is activated with the balloon of the balloon-stent catheter set (10) being inflated to position the stent and piston release (23). Positioned the stent by activating the balloon-stent catheter set (10) at the point of obstruction (20) of the artery (21), the balloon of the balloon-stent catheter set (10) is deflated to remove the balloon-stent catheter (10), leaving only the stent and balloon (3j positioned and plungers (23), to be collected by the delivery catheter (1) which is positioned at the point where the stent is positioned to suck the plungers (23) as shown in Figure 13, and after the suction of the plungers the balloon (3) of the distal end of the catheter (2) of the present invention is deflated and blood flow is normalized.
[00047] A explanação acima, não obstante ampla, não excluí outras modalidades que eventualmente possam decorrer da presente invenção, tanto por um modelo construtivo diferenciador quanto por caracteristícas novas, contempladas em decorrência do desenvolvimento prático da presente invenção, não estando, portanto, limitada a presente invenção aos tópicos acima descritos. [00047] The above explanation, although broad, does not exclude other modalities that may eventually arise from the present invention, both by a differentiating constructive model and by new characteristics, contemplated as a result of the practical development of the present invention, therefore, not being limited the present invention to the topics described above.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR1020190037423 | 2019-02-25 | ||
| BR102019003742-3A BR102019003742A2 (en) | 2019-02-25 | 2019-02-25 | MICROCATETER FOR INTERVENTION AND ENDOVASCULAR PROTECTION |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020172729A1 true WO2020172729A1 (en) | 2020-09-03 |
Family
ID=72238217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR2020/000007 Ceased WO2020172729A1 (en) | 2019-02-25 | 2020-02-20 | Microcatheter for endovascular intervention and protection |
Country Status (2)
| Country | Link |
|---|---|
| BR (1) | BR102019003742A2 (en) |
| WO (1) | WO2020172729A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4771777A (en) * | 1987-01-06 | 1988-09-20 | Advanced Cardiovascular Systems, Inc. | Perfusion type balloon dilatation catheter, apparatus and method |
| US5135484A (en) * | 1990-05-09 | 1992-08-04 | Pioneering Technologies, Inc. | Method of removing plaque from vessels |
| US5195955A (en) * | 1989-11-14 | 1993-03-23 | Don Michael T Anthony | Device for removal of embolic debris |
| WO2003086525A1 (en) * | 2002-04-09 | 2003-10-23 | Don Michael T Anthony | Distal protection double balloon catheter |
| US20140121758A1 (en) * | 2007-10-17 | 2014-05-01 | Covidien Lp | Revascularization devices |
-
2019
- 2019-02-25 BR BR102019003742-3A patent/BR102019003742A2/en not_active IP Right Cessation
-
2020
- 2020-02-20 WO PCT/BR2020/000007 patent/WO2020172729A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4771777A (en) * | 1987-01-06 | 1988-09-20 | Advanced Cardiovascular Systems, Inc. | Perfusion type balloon dilatation catheter, apparatus and method |
| US5195955A (en) * | 1989-11-14 | 1993-03-23 | Don Michael T Anthony | Device for removal of embolic debris |
| US5135484A (en) * | 1990-05-09 | 1992-08-04 | Pioneering Technologies, Inc. | Method of removing plaque from vessels |
| WO2003086525A1 (en) * | 2002-04-09 | 2003-10-23 | Don Michael T Anthony | Distal protection double balloon catheter |
| US20140121758A1 (en) * | 2007-10-17 | 2014-05-01 | Covidien Lp | Revascularization devices |
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|---|---|
| BR102019003742A2 (en) | 2020-10-06 |
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