CN115501456B - Guiding device - Google Patents
Guiding device Download PDFInfo
- Publication number
- CN115501456B CN115501456B CN202110688913.7A CN202110688913A CN115501456B CN 115501456 B CN115501456 B CN 115501456B CN 202110688913 A CN202110688913 A CN 202110688913A CN 115501456 B CN115501456 B CN 115501456B
- Authority
- CN
- China
- Prior art keywords
- outer tube
- inner tube
- tube
- hole
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012530 fluid Substances 0.000 claims abstract description 93
- 238000003466 welding Methods 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 2
- 208000007536 Thrombosis Diseases 0.000 description 21
- 230000017531 blood circulation Effects 0.000 description 15
- 210000004204 blood vessel Anatomy 0.000 description 11
- 239000010410 layer Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 9
- 239000004677 Nylon Substances 0.000 description 6
- 229920001778 nylon Polymers 0.000 description 6
- 206010008132 Cerebral thrombosis Diseases 0.000 description 4
- 201000001429 Intracranial Thrombosis Diseases 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000002792 vascular Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 239000002872 contrast media Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000002504 physiological saline solution Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 208000015114 central nervous system disease Diseases 0.000 description 1
- 230000002490 cerebral effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- 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
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
-
- 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
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
- A61B2017/22062—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation to be filled with liquid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with suction of debris
-
- 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
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M2025/0039—Multi-lumen catheters with stationary elements characterized by lumina being arranged coaxially
-
- 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
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1079—Balloon catheters with special features or adapted for special applications having radio-opaque markers in the region of the balloon
Abstract
The invention provides a guiding device, which comprises an inner tube, an outer tube and an expandable component, wherein the outer tube is sleeved outside the inner tube, a fluid channel is formed between the outer tube and the inner tube, the expandable component is arranged outside the far end of the outer tube, at least one through hole is formed at the far end of the outer tube, when the expandable component is filled with fluid in an expansion state, a fluid cavity is formed between the outer tube and the expandable component, the through hole is communicated with the fluid channel and the fluid cavity, at least two concave parts are further formed at the far end of the outer tube, each concave part faces towards the inner tube and is fixed on the inner tube, and each through hole is arranged between two adjacent concave parts in the circumferential direction of the outer tube. The at least two concave parts of the outer tube are respectively sunken towards the inner tube and fixed on the inner tube, the concave parts and the inner tube can provide supporting force for the part between the two adjacent concave parts of the outer tube, so that the part between the two adjacent concave parts of the outer tube is arched, and when the fluid in the fluid cavity is pumped out, the part of the outer tube around the through hole is prevented from being clung to the wall of the inner tube to block the through hole.
Description
Technical Field
The invention relates to a vascular interventional medical instrument, in particular to a guiding device.
Background
Cerebral thrombosis is mainly caused by cerebral vascular thrombosis and is the most common fatal and disabling disease of the central nervous system. Cerebral thrombosis has the characteristics of high morbidity, high disability rate, high mortality rate and high recurrence rate.
The recanalization of the blood vessel is the key for treating cerebral thrombosis, at present, a treatment method of cerebral thrombosis is mechanical thrombus removal, the thrombus removal device is pushed to the position of target thrombus by adopting an interventional medical instrument, then fluid is injected between an inner tube and an outer tube of the balloon guiding catheter, the fluid flows into a balloon tube coated on the periphery of the outer tube through a through hole on the outer tube, so that the balloon tube is expanded and attached to the inner wall of the blood vessel, blood flow is blocked temporarily, the thrombus removal device cuts into the target thrombus to hold the whole thrombus, then the thrombus removal device is retracted to remove the thrombus, and the fluid in the balloon tube is sucked to enable the balloon tube to shrink to the outer surface of the attached outer tube, so that the blood flow is restored to normal flow.
However, when the fluid is sucked, the flow rate of the fluid at the through hole is the largest, the negative pressure born by the part of the outer tube around the through hole is far greater than the negative pressure born by other parts of the outer tube, so that the part of the outer tube around the through hole is easy to sink towards the inner tube, the distance between the outer tube and the inner tube is reduced, the time required for the contraction of the balloon tube is increased, even the part of the outer tube around the through hole is tightly attached to the wall of the inner tube to block the through hole, thereby causing the fluid to remain in the balloon tube, further causing the time that the blood flow is blocked to be increased, and increasing the operation risk.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a guiding device to solve the problem that when fluid is pumped, the portion of the outer tube around the through hole is easy to dent into the inner tube and even cling to the inner tube wall to block the through hole, so that the fluid in the balloon cannot be smoothly discharged.
In order to achieve one of the above objects, an embodiment of the present invention provides a guiding device, including an inner tube, an outer tube, and an expandable member, wherein the outer tube is sleeved outside the inner tube, a fluid channel is formed between the outer tube and the inner tube, the expandable member is disposed outside a distal end of the outer tube, at least one through hole is formed at a distal end of the outer tube, a fluid cavity is formed between the outer tube and the expandable member when the expandable member is injected with fluid in an expanded state, the through hole is communicated with the fluid channel and the fluid cavity, the distal end of the outer tube further has at least two concave portions, each concave portion is recessed toward the inner tube and is fixed to the inner tube, each through hole is disposed between two adjacent concave portions in a circumferential direction of the outer tube, and the through hole is located in the balloon tube.
As a further improvement of an embodiment of the present invention, in the circumferential direction of the outer tube, the distance from each of the through holes to the two recesses adjacent thereto is equal.
As a further improvement of an embodiment of the present invention, two of the concave portions adjacent to the through holes are located on the same circumference of the outer tube and are arranged at intervals of 180 °.
As a further improvement of one embodiment of the present invention, the inflatable member is a balloon.
As a further improvement of an embodiment of the present invention, both ends of the expandable member are fixed to the outer tube, respectively, in an axial direction of the outer tube, and the recess is located outside the expandable member.
As a further refinement of an embodiment of the invention, the recess is located on a side of the expandable member near the proximal end of the outer tube.
As a further improvement of an embodiment of the present invention, the outer tube includes a first section and a second section disposed in order from a proximal end to a distal end thereof, the expandable member is disposed outside the second section, the through hole is disposed in the second section, and an outer diameter of the second section is not greater than a maximum diameter of the first section.
As a further improvement of an embodiment of the invention, the recess extends in the axial direction of the outer tube.
As a further improvement of one embodiment of the invention, the recess is fixed to the inner tube by welding, bonding or fusion.
As a further improvement of an embodiment of the present invention, the hardness of the outer tube is gradually decreased from the proximal end to the distal end, and/or the hardness of the inner tube is gradually decreased from the proximal end to the distal end.
Compared with the prior art, the invention has the following beneficial effects: according to the guiding device, at least two concave parts of the outer tube are respectively sunken towards the inner tube and are fixed to the inner tube, the concave parts and the inner tube can provide supporting force for the part between the two adjacent concave parts of the outer tube, so that the part between the two adjacent concave parts of the outer tube is arched, the radial distance from the highest point of the arch to the inner tube is increased, when the fluid in the fluid cavity is extracted from the through hole between the two adjacent concave parts after the thrombus taking is completed, under the supporting force action of the concave parts and the inner tube, even if the fluid flow velocity at the through hole is the largest, the negative pressure born by the part of the outer tube around the through hole is far greater than the negative pressure born by the other part of the outer tube, the part of the outer tube around the through hole is not excessively sunken towards the inner tube, a certain space is reserved between the part of the outer tube around the through hole and the inner tube so that the fluid smoothly flows out of the fluid cavity, the situation that the part of the outer tube around the through hole is tightly attached to the inner tube wall to block the through hole is avoided under the condition that the diameter of the outer tube is not increased, the expandable part is restored to the expanded state from the expanded state to the expanded state, the blood flow of the expandable part and the inner wall is separated from the inner wall is blocked, the blood vessel is easily and the blood flow of the expandable part is easily restored, the blood is easily and the risk of the operation is reduced is easily recovered.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic cross-sectional view of a guiding device according to an embodiment of the present invention, wherein the balloon is shown in a contracted state;
FIG. 2 is a schematic cross-sectional view of a guiding device according to an embodiment of the present invention, wherein the balloon is shown in an inflated state;
fig. 3 is a schematic cross-sectional view of an introducer device showing the balloon in an inflated state and with a cross-section at its maximum diameter, in accordance with an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the various illustrations of the invention, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for convenience of illustration, and thus serve only to illustrate the basic structure of the inventive subject matter.
It is to be understood that in the description of the present invention, unless explicitly stated and limited otherwise, the orientation or positional relationship indicated by the terms "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, the present invention proposes a guiding device 100, comprising an inner tube 1, an outer tube 2, a connecting tube 3 and an expandable member, wherein the outer tube 2 is sleeved outside the inner tube 1 and is coaxially arranged with the inner tube 1, a fluid channel 6 is formed between the outer tube 2 and the inner tube 1, and a sealing portion 5 extending from the distal end of the outer tube 2 to the inner tube 1 along the radial direction of the outer tube 2 is further arranged at the distal end of the guiding device 100, so that the fluid is prevented from flowing out of the guiding device 100 and entering into a blood vessel. One end of the connecting pipe 3 is connected to the outer pipe 2, and the lumen of the connecting pipe 3 is communicated with the fluid channel 6, but the lumen of the connecting pipe 3 is isolated from the lumen of the inner pipe 1, so that fluid can be conveniently injected into the fluid channel 6 from the connecting pipe 3, and the fluid can not enter the lumen of the inner pipe 1.
Referring to fig. 1 to 2, the expandable member is disposed on the outer side of the distal end of the outer tube 2, at least one through hole 21 is formed in the distal end of the outer tube 2, the expandable member has an expanded state and a contracted state that is closely attached to the outer surface of the outer tube 2, when the expandable member is filled with fluid in the expanded state, a fluid cavity 41 is formed between the outer tube 2 and the expandable member, the through hole 21 is communicated with the fluid channel 6 and the fluid cavity 41, at this time, the fluid flows into the fluid cavity 41 from the fluid channel 6 and fills the fluid cavity 41, and the expandable member expands along the axial direction thereof to be attached to the inner wall of a blood vessel, thereby playing a role of temporarily blocking the blood flow, and avoiding the influence of the blood flow on the thrombus extraction process. The fluid here is a mixed solution of contrast agent and physiological saline to facilitate observation of the inflated state of the inflatable member.
Specifically, in this embodiment, the inflatable member is a balloon 4, the balloon 4 is disposed on the outer periphery of the outer tube 2, the outer tube 2 is provided with a through hole 21 for communicating the fluid channel 6 with the balloon 4, the balloon 4 has an inflated state and a contracted state tightly attached to the outer surface of the outer tube 2, when the balloon 4 is filled with fluid in the inflated state, a fluid cavity 41 is formed between the outer tube 2 and the balloon 4, at this time, the fluid flows into the fluid cavity 41 from the fluid channel 6 and fills the fluid cavity 41, and the balloon 4 expands axially to the inner wall of the attached blood vessel, thereby playing a role of temporarily blocking blood flow, and avoiding the influence of the blood flow on the thrombus removal process. The fluid here is a mixed solution of a contrast agent and physiological saline so as to observe the inflated state of the balloon 4.
Referring to fig. 3, the outer tube 2 further has at least two recesses 22, each recess 22 being recessed toward the inner tube 1 and being fixed to the inner tube 1, the recesses 22 being disposed adjacent to the through holes 21, and in the circumferential direction of the outer tube 2, each through hole 21 being disposed between two adjacent recesses 22, the through holes 21 being located within the balloon 4. In this way, the concave portion 22 and the inner tube 1 provide supporting force for the portion between two adjacent concave portions 22 of the outer tube 2, so that the portion between two adjacent concave portions 22 of the outer tube 2 is arched, and the radial distance from the highest point of the arch to the inner tube 1 is increased, so that the radial distance from the through hole 21 to the inner tube 1 is increased, when the fluid in the fluid cavity 41 is sucked out of the fluid cavity 41 after the thrombus removal is completed, even if the fluid flow rate at the through hole 21 is maximum, the portion of the outer tube 2 around the through hole 21 is subjected to a negative pressure far greater than the negative pressure borne by the other portions of the outer tube 2, under the supporting force of the concave portion 22 and the inner tube 1, the portion of the outer tube 2 around the through hole 21 is not excessively recessed into the inner tube 1, and a certain space is still provided between the portion of the outer tube 2 around the through hole 21 and the inner tube 1 so that the fluid smoothly flows out of the fluid cavity 41, and under the condition that the portion of the outer tube 2 around the through hole 21 is tightly adhered to the wall of the inner tube 1 is prevented from being blocked, the condition that the through hole 21 is blocked, the balloon 4 is restored from the inflated state to the state, the balloon 4 is separated from the tightened state, the blood vessel 4 is separated from the inner wall, and the blood flow of the blood flow is guided to flow of the apparatus is reduced, and the risk of the operation is easily removed.
Specifically, in the present embodiment, the balloon 4 is disposed outside the distal end of the outer tube 2, and the through-hole 21 and at least two recesses 22 are also disposed at the distal end of the outer tube 2, so that it is convenient for blocking the blood flow in the vicinity of the location of the target thrombus, and to prevent the debris emboli generated during the thrombus removal process from flowing along with the blood flow toward the distal end of the blood vessel.
In the present invention, the terms "distal" and "proximal" are to be understood as meaning, as seen from the direction of the operator, the proximal end being the end closer to the operator and the distal end being the end farther from the operator during operation, the direction indicated by the arrow in the figure being the direction from the proximal end to the distal end.
Preferably, through holes 21 are provided between every two adjacent concave parts 22, so that the fluid in the fluid chamber 41 can be split through a plurality of through holes 21, the negative pressure at each through hole 21 can be reduced, the speed can be increased, the time for the fluid chamber 41 to go from the expanded state to the contracted state can be shortened, the blood can be quickly recovered to flow, and the operation risk can be reduced.
Referring to fig. 3, in the present embodiment, the outer tube 2 has two concave portions 22, and in the circumferential direction of the outer tube 2, the concave portions 22 and the through holes 21 are alternately arranged, that is, the through holes 21 are provided between two adjacent concave portions 22, and the concave portions 22 are also provided between two adjacent through holes 21. Of course, the number of the arrangement of the outer tube 2 and the concave portion 22 is not limited thereto, and in other embodiments, the concave portion 22 and the through hole 21 may each be arranged in plural and alternately in the circumferential direction of the outer tube 2.
Further, at least two concave portions 22 are arranged at intervals in the circumferential direction of the outer tube 2. Thus, each of the concave portions 22 provides a supporting force to the other portion of the outer tube 2 in the tangential direction of the position thereof, under which supporting force the portion between the adjacent concave portions 22 of the outer tube 2 is arched outward in the circumferential direction, and the negative pressure that the portion between the adjacent concave portions 22 can withstand becomes large, and when the fluid in the fluid chamber 41 is sucked out of the fluid chamber 41, the supporting force can provide a radial inward pressure on the outer tube 2 against the fluid flowing out of the fluid chamber 41 into the outer tube 2, reduce the collapse amplitude of the outer tube 2 into the inner tube 1 so that the outer tube 2 does not collapse to close the inner tube 1 to block the through hole 21, and in addition, the portion between the adjacent concave portions 22 of the outer tube 2 is arched outward in the circumferential direction, also increases the distance between the portion of the outer tube 2 between the adjacent concave portions 22 and the inner tube 1, that is, increases the space in which the outer tube 2 moves toward the inner tube 1, and reduces the possibility that the outer tube 2 collapses to close the inner tube 1 to close the through hole 21.
Preferably, in the circumferential direction of the outer tube 2, the distance between each through hole 21 and the two concave portions 22 adjacent thereto is equal. From the above analysis, it is clear that each recess 22 provides a supporting force to the other part of the outer tube 2 in the tangential direction of the position where it is located, under the action of which supporting force the part between two adjacent recesses 22 of the outer tube 2 is arched outwards in the circumferential direction, so that the distance from the part of the outer tube 2 at the midpoint of the two adjacent recesses 22 to the inner tube 1 is maximum, and the component force of the supporting force provided by the two adjacent recesses 22 received therein is maximum, so that the negative pressure which can be sustained is maximum, the collapse amplitude is minimum when the fluid flows into the outer tube 2 through the through hole 21, and the space where the outer tube 2 collapses is maximum, so that the influence on the fluid flow of the fluid cavity 41 through the through hole 21 to the fluid channel 6 is minimum, and the occurrence of the situation that the outer tube 2 collapses to close the inner tube 1 and the through hole 21 is blocked is avoided.
Referring to fig. 3, taking the example as an example, on the same circumference of the outer tube 2, two concave portions 22 are arranged at intervals of 180 °, and in the circumferential direction of the outer tube 2, the through hole 21 and the two concave portions 22 adjacent thereto are respectively arranged at intervals of 90 °, so that the distance from the through hole 21 to the inner tube 1 is maximized, and the component force of the supporting force provided thereto by the two adjacent concave portions 22 received by the outer tube 2 around the through hole 21 is maximized.
In the axial direction of the outer tube 2, both ends of the expandable member are fixed to the outer tube 2, respectively, and the recess 22 is located outside the expandable member, and a portion between both ends of the expandable member is expanded when fluid is injected, so that an excessive outer diameter of the distal end of the guide 100 due to the recess 22 and the expandable member being located on the same circumference of the outer tube 2 can be avoided. Preferably, the recess 22 is located on the side of the expandable member near the proximal end of the outer tube 2.
In other embodiments, at least part of the through hole 21 and the two recesses 22 adjacent thereto may be disposed on the same circumference of the outer tube 2, so that the space between the outer tube 2 and the inner tube 1 around the through hole 21 is maximized, and the supporting force provided by the inner tube 1 and the two recesses 22 adjacent thereto is maximized, so that the negative pressure that can be sustained is maximized, the magnitude of collapse when the fluid flows from the fluid chamber 41 into the outer tube 2 through the through hole 21 is minimized, and the occurrence of the situation that the outer tube 2 collapses to abut against the inner tube 1 to cause the through hole 21 to be blocked is avoided. Preferably, the recess 22 is at least partially provided at the intersection of the cross section of the axial center of the expandable member and the outer tube 2, so that the supporting forces of the inner tube 1 and the recess 22 to the rest of the outer tube 2 are mainly concentrated at the cross section of the axial center of the expandable member, the outer tube 2 is arched outwardly along the cross section with the largest arch width at the cross section, and the arch width is in a gradually decreasing trend from the cross section toward both ends of the expandable member in the axial direction of the outer tube 2, which trend coincides with the expansion width variation trend of the expandable member, thereby facilitating the fluid flowing from the fluid chamber 41 into the fluid passage 6 through the through hole 21.
Preferably, the through hole 21 is provided at the intersection of the cross section of the expandable member at the axial centre thereof with the outer tube 2, such that the through hole 21 also arches outwardly with the outer tube 2 along this cross section, increasing the distance between the through hole 21 and the inner tube 1, facilitating the smooth flow of fluid from the fluid chamber 41 through the through hole 21 into the fluid channel 6 and avoiding the risk of the through hole 21 being blocked.
Further, the concave portion 22 extends along the axial direction of the outer tube 2, so that the arched area of the outer tube 2, especially the area extending along the axial direction of the outer tube 2, is beneficial to enlarging the area of the through holes 21 or arranging a plurality of through holes 21 along the axial direction, so as to increase the speed of fluid flowing from the fluid cavity 41 into the fluid channel 6, shorten the time, thereby quickly removing the blocking of the blood flow and retracting the guiding device 100, quickly completing the operation process and reducing the operation risk.
Referring to fig. 1 to 2, further, at least two through holes 21 are provided between two adjacent concave portions 22 at intervals along the axial direction of the outer tube 2, so that the fluid pressure in the fluid chamber 41 is dispersed, and the phenomenon that the pressure of the part of the outer tube 2 is excessively large and closely attached to the inner tube 1 due to the fact that the fluid pressure in the fluid chamber 41 is concentrated on the outer tube 2 near one through hole 21 when the fluid flows out of the through hole 21 is avoided.
The inner tube 1 and the outer tube 2 can be made of nylon elastomer, nylon, polyurethane, polyimide or polytetrafluoroethylene to form a single-layer structure, so that the inner tube 1 and the outer tube 2 have certain flexibility and strength to be conveniently inserted into a blood vessel; the inner tube 1 and the outer tube 2 can also be formed by compounding a multi-layer structure, and specifically, the inner tube comprises an outer layer, an inner layer and a reinforcing layer arranged between the outer layer and the inner layer, the flexibility of the inner tube 1 and the outer tube 2 is kept, the strength of the inner tube 1 and the outer tube 2 is improved, preferably, the outer layer is made of nylon elastomer, nylon or polyurethane, the inner layer is made of nylon elastomer, nylon, polyurethane or polytetrafluoroethylene, and the reinforcing layer is made of a woven mesh or a spring mesh made of stainless steel, nickel titanium or high polymer materials; of course, the inner tube 1 and the outer tube 2 may include only the outer layer and the reinforcing layer, and the strength of the inner tube 1 and the outer tube 2 may be improved as well.
Further, the concave portion 22 is fixed to the inner tube 1 by welding, bonding or welding, so that the supporting force can be provided for the outer tube 2 by the inner tube 1 to reduce the collapse amplitude of the outer tube 2 and even prevent the collapse of the outer tube 2, the welding or welding mode is selected based on the materials of the outer tube 2 and the inner tube 1 and the sizes of the outer tube 2 and the inner tube 1 are limited by the pipe diameter of the blood vessel, the concave portion 22 of the outer tube 2 is favorably fixed to the inner tube 1, the outer tube 2 and the inner tube 1 are not damaged, the inner diameter of the inner tube 1 is not reduced, and the thrombus taking device can smoothly pass through the guiding device 100 to reach the target thrombus.
Referring to fig. 1 to 2, further, the outer tube 2 includes a first section 23 and a second section 24 sequentially disposed from the proximal end to the distal end thereof, the expandable member is disposed outside the second section 24, the through hole 21 is disposed in the second section 24, the recess 22 is disposed at one end of the first section 23 near the expandable member to ensure that the blood flow near the target thrombus is blocked, and the outer diameter of the second section 24 is not greater than the maximum diameter of the first section 23, thereby avoiding the size increase of the distal end of the guide device 100 caused by the disposition of the expandable member, and ensuring that the inner diameter of the inner tube 1 is as large as possible under the condition of being limited to the inner diameter of the blood vessel, thereby facilitating the passing of the thrombus taking device.
Further, the outer tube 2 may have a hardness that tapers from the proximal end to the distal end and/or the inner tube 1 may have a hardness that tapers from the proximal end to the distal end, thereby increasing the flexibility of the distal end of the guide device 100 so as to prevent damage to the vessel during insertion of the guide device 100 into the vessel and expansion of the expandable member.
In addition, a developing ring may be installed at both the distal end of the inner tube 1 and the proximal end of the expandable member to facilitate determination of the target thrombus location and the state of the expandable member.
In summary, in the guiding device 100 proposed in the present invention, at least two concave portions 22 of the outer tube 2 are respectively recessed toward the inner tube 1 and fixed to the inner tube 1, the concave portions 22 and the inner tube 1 will not provide excessive supporting force to the portion between two adjacent concave portions 22 of the outer tube 2, so that the portion between the two adjacent concave portions 22 of the outer tube 2 arches, and the radial distance from the highest point of the arching to the inner tube 1 is increased, when the fluid in the fluid cavity 41 is pumped out from the through hole 21 provided between the two adjacent concave portions 22 after the thrombus is removed, under the supporting force of the concave portions 22 and the inner tube 1, even if the fluid flow rate at the through hole 21 is the greatest, the negative pressure born by the portion of the outer tube 2 around the through hole 21 is far greater than the negative pressure born by the other portion of the outer tube 2, the portion of the outer tube 2 around the through hole 21 will not be recessed too much toward the inner tube 1, so that the portion of the outer tube 2 around the through hole 21 still has a certain space to smoothly flow out of the fluid from the fluid cavity 41, under the condition that the diameter of the outer tube 2 is not increased, the condition that the portion around the through hole 21 is blocked up to the wall 21 of the inner tube 1 is avoided, the condition that the portion around the through hole 21 is blocked, the portion of the portion around the inner tube 21 is easily to the wall of the through hole 21, the portion is easily blocked, the expanded, and the risk of the expansion state can be recovered, and the expanded condition can be easily, and the vascular state can be recovered, and the expanded.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. The utility model provides a guiding device, includes inner tube, outer tube and expandable member, the outer tube cover is located the inner tube outside, just the outer tube with form fluid channel between the inner tube, guiding device's distal end still is provided with from the distal end of outer tube extends to the closure of inner tube, expandable member locates the outside of outer tube distal end, at least one through-hole has been seted up to the distal end of outer tube, expandable member pours into fluid in the inflation state into, outer tube with form the fluid chamber between the expandable member, the through-hole intercommunication fluid channel with the fluid chamber, a serial communication port, the distal end of outer tube still has two at least concave parts, every concave part orientation the inner tube is sunken and is fixed in the inner tube in the circumferencial direction of outer tube, every the through-hole is located between two adjacent concave parts.
2. The guide device according to claim 1, wherein a distance from each of the through holes to two of the recesses adjacent thereto is equal in a circumferential direction of the outer tube.
3. The guide device according to claim 2, wherein two of the recesses adjacent to the through holes are located on the same circumference of the outer tube and are arranged 180 ° apart.
4. The guide device of claim 1, wherein the inflatable member is a balloon.
5. The guide device according to claim 1, wherein both ends of the expandable member are fixed to the outer tube, respectively, in an axial direction of the outer tube, and the recess is located outside the expandable member.
6. The guide device of claim 5, wherein the recess is located on a side of the expandable member near the proximal end of the outer tube.
7. The guide device according to claim 1, wherein the outer tube comprises a first section and a second section disposed in sequence from a proximal end to a distal end thereof, the expandable member is disposed outside the second section, the through hole is disposed in the second section, and an outer diameter of the second section is not greater than a maximum diameter of the first section.
8. The guide device of claim 1, wherein the recess extends in an axial direction of the outer tube.
9. The guide device according to claim 1, wherein the recess is fixed to the inner tube by welding, bonding or fusion.
10. The guide device of claim 1, wherein the outer tube has a hardness that tapers from the proximal end to the distal end and/or the inner tube has a hardness that tapers from the proximal end to the distal end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110688913.7A CN115501456B (en) | 2021-06-22 | 2021-06-22 | Guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110688913.7A CN115501456B (en) | 2021-06-22 | 2021-06-22 | Guiding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115501456A CN115501456A (en) | 2022-12-23 |
| CN115501456B true CN115501456B (en) | 2024-04-26 |
Family
ID=84500502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110688913.7A Active CN115501456B (en) | 2021-06-22 | 2021-06-22 | Guiding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115501456B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372587A (en) * | 1989-01-09 | 1994-12-13 | Pilot Cariovascular Systems, Inc. | Steerable medical device |
| CN102488955A (en) * | 2011-12-07 | 2012-06-13 | 湖南埃普特医疗器械有限公司 | Balloon guide catheter, and preparation method thereof |
| CN202366306U (en) * | 2011-12-07 | 2012-08-08 | 湖南埃普特医疗器械有限公司 | Balloon guiding catheter |
| CN105228538A (en) * | 2013-03-14 | 2016-01-06 | 波士顿科学国际有限公司 | Conduit is entered again under there is the inner membrance of controlled shape sacculus |
| CN108969872A (en) * | 2018-09-28 | 2018-12-11 | 南京普微森医疗科技有限公司 | A kind of balloon guide catheter |
| CN209827933U (en) * | 2019-02-01 | 2019-12-24 | 科塞尔医疗科技（苏州）有限公司 | Balloon catheter |
| CN112169142A (en) * | 2019-12-17 | 2021-01-05 | 深圳市业聚实业有限公司 | Suction catheter |
| CN112827056A (en) * | 2019-11-25 | 2021-05-25 | 尼尔拉维有限公司 | Balloon guide catheter without preparation stage |
| CN215018480U (en) * | 2021-06-22 | 2021-12-07 | 上海加奇生物科技苏州有限公司 | Guiding device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100689238B1 (en) * | 2005-06-17 | 2007-03-02 | 이근호 | Apparatus for making a balloon catheter and method of the same |
| CN103357105A (en) * | 2013-07-24 | 2013-10-23 | 王亮 | Limited contact type side saccule double-hole catheter |
-
2021
- 2021-06-22 CN CN202110688913.7A patent/CN115501456B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372587A (en) * | 1989-01-09 | 1994-12-13 | Pilot Cariovascular Systems, Inc. | Steerable medical device |
| CN102488955A (en) * | 2011-12-07 | 2012-06-13 | 湖南埃普特医疗器械有限公司 | Balloon guide catheter, and preparation method thereof |
| CN202366306U (en) * | 2011-12-07 | 2012-08-08 | 湖南埃普特医疗器械有限公司 | Balloon guiding catheter |
| CN105228538A (en) * | 2013-03-14 | 2016-01-06 | 波士顿科学国际有限公司 | Conduit is entered again under there is the inner membrance of controlled shape sacculus |
| CN108969872A (en) * | 2018-09-28 | 2018-12-11 | 南京普微森医疗科技有限公司 | A kind of balloon guide catheter |
| CN209827933U (en) * | 2019-02-01 | 2019-12-24 | 科塞尔医疗科技（苏州）有限公司 | Balloon catheter |
| CN112827056A (en) * | 2019-11-25 | 2021-05-25 | 尼尔拉维有限公司 | Balloon guide catheter without preparation stage |
| CN112169142A (en) * | 2019-12-17 | 2021-01-05 | 深圳市业聚实业有限公司 | Suction catheter |
| CN215018480U (en) * | 2021-06-22 | 2021-12-07 | 上海加奇生物科技苏州有限公司 | Guiding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115501456A (en) | 2022-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0981387B1 (en) | Balloon catheter apparatus | |
| US6626861B1 (en) | Balloon catheter apparatus and method | |
| KR102149574B1 (en) | Balloon catheter | |
| US7722634B2 (en) | Medical device and method of intravenous filtration | |
| US5195955A (en) | Device for removal of embolic debris | |
| JP5040310B2 (en) | Treatment catheter | |
| US20100137793A1 (en) | Spiral balloon catheter | |
| US20160279393A1 (en) | Guidewire retrieval catheter | |
| US11931522B2 (en) | Inflation lumen kink protection and balloon profile | |
| WO2016106224A1 (en) | Device for treating vascular occlusion | |
| CN115501456B (en) | Guiding device | |
| CN215018480U (en) | Guiding device | |
| EP2962719B1 (en) | Balloon catheter | |
| CN117100470A (en) | Vascular stent | |
| EP4032490A1 (en) | Anchoring and non-occluding intravascular device for use during clot removal via aspiration and/or mechanical extraction device | |
| US20220126071A1 (en) | Balloon catheter with porous outer member for air purging | |
| US20160000593A1 (en) | Delivery system for a living body indwelling member | |
| JP2007252895A (en) | Catheter for removing intravascular foreign substance | |
| JP4379226B2 (en) | Balloon catheter for stone removal | |
| US20230363761A1 (en) | Method and system of reducing limb ischemia | |
| CN113546282B (en) | Balloon guide sleeve with filling groove | |
| CN217744698U (en) | Embolic protector and embolic system | |
| CN217119105U (en) | Bifurcated sacculus | |
| CN215018458U (en) | Catheter and medical instrument | |
| TW202408427A (en) | Method and system of reducing limb ischemia |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |