CN111938747A - Bolt taking mechanism and conveying device - Google Patents
Bolt taking mechanism and conveying device Download PDFInfo
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- CN111938747A CN111938747A CN202010722492.0A CN202010722492A CN111938747A CN 111938747 A CN111938747 A CN 111938747A CN 202010722492 A CN202010722492 A CN 202010722492A CN 111938747 A CN111938747 A CN 111938747A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 48
- 208000007536 Thrombosis Diseases 0.000 claims abstract description 239
- 230000000903 blocking effect Effects 0.000 claims abstract description 78
- 238000013151 thrombectomy Methods 0.000 claims abstract description 15
- 238000013156 embolectomy Methods 0.000 claims description 54
- 230000000670 limiting effect Effects 0.000 claims description 53
- 238000000926 separation method Methods 0.000 claims description 5
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- 239000012567 medical material Substances 0.000 claims description 4
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- 239000003550 marker Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 16
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- 230000002792 vascular Effects 0.000 abstract description 6
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- 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
-
- 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
- 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
- A61B2017/22081—Treatment of vulnerable plaque
-
- 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
- A61B2017/22094—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 for crossing total occlusions, i.e. piercing
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Medical Informatics (AREA)
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- Animal Behavior & Ethology (AREA)
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- Surgical Instruments (AREA)
Abstract
The invention relates to the field of medical instruments, and particularly discloses a thrombus removal mechanism and a conveying device, wherein the thrombus removal mechanism comprises: the plug taking device comprises a pushing piece, a plug taking support and an anti-leakage piece, wherein the anti-leakage piece is provided with an accommodating cavity with one end being a first opening; the bolt taking support is driven by the pushing piece to slide, can be accommodated in the accommodating cavity of the anti-leakage piece through the first opening, is limited in the collecting state of the accommodating cavity by the blocking force, and is switched between the separating state of retreating out of the accommodating cavity by releasing the blocking force. The effect of drawing back the thrombectomy support is realized through operation propelling movement spare, and at the in-process of drawing back the thrombectomy support, the thrombectomy support is accomodate in the intracavity that holds of leak protection piece, and at the in-process of drawing back propelling movement spare, the thrombus that the leak protection piece can protect on the thrombectomy support is not touched by the vascular wall.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a thrombus removal mechanism and a conveying device.
Background
Acute ischemic stroke is a serious hazard to human life and requires immediate treatment. Typical treatment options include intravenous injection of thrombolytic drugs or the use of special embolectomy devices.
The first option involves the use of thrombolytic agents, such as thrombolytic agents, but this method is not effective for long treatment times; a second option consists of using an embolectomy device, which is aimed at physically trapping the thrombus or clot and removing it from the occluded vessel, thus restoring the flow of blood, and which has the major advantage of prolonging the duration of the treatment, so that most of the current procedures for acute cerebral arterial thrombosis use are performed by means of an embolectomy device.
For example, chinese patent publication No. CN107198554B discloses a thrombus removal device, which includes a thrombus removal stent and a thrombus collection net, wherein a proximal end of the thrombus collection net is welded to a distal end of the thrombus removal stent, and a proximal end of the collection net is open and is sleeved outside the distal end of the thrombus removal stent.
Above-mentioned thrombectomy apparatus is when using, get and tie in the blood vessel with the whole intervention of collecting the net, after getting to tie in the support catches the thrombus in the blood vessel and when withdrawing from the blood vessel towards its near-end pullback, get thrombus or blood clot on the support of tying in the pullback motion in-process, can bump the vascular wall and drop from getting to tie in the support, collect the net because the near-end is opening and its distal end is the shrink end, then collect the inner chamber of net and be used for collecting thrombus or the blood clot that drops from getting to tie in the support, collect the net and can collect thrombus or the blood clot that drops from getting to tie in the support, but the thrombus that is located to tie in the support still can touch the vascular wall, lead to blood clot or thrombus to constantly drop from getting to tie in the support.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that in the prior thrombus taking device, although the collection net can collect thrombus or blood clots falling off from the thrombus taking support in the pulling-back motion process of the thrombus or blood clots on the thrombus taking support, the thrombus on the thrombus taking support still touches the blood vessel wall, and the blood clots or the blood clots continuously fall off from the thrombus taking support, thereby providing a thrombus taking mechanism and a conveying device which can protect the thrombus or the blood clots on the thrombus taking support from being touched by the inner wall surface of the blood vessel wall.
Therefore, the invention provides a bolt taking mechanism, which comprises: a pushing member; the thrombus taking bracket is fixed on the far end of the pushing member; the anti-leakage piece is in a net shape; the anti-leakage part is sleeved on the pushing part in a sliding mode and is provided with an accommodating cavity with one end being provided with a first opening; the bolt taking support is driven by the pushing piece to slide, can be accommodated in the accommodating cavity of the anti-leakage piece through the first opening, is limited in the collecting state of the accommodating cavity by the blocking force, and is switched between the separating state of retreating out of the accommodating cavity by releasing the blocking force.
Optionally, in the bolt removing mechanism, one end of the anti-leakage member is folded toward the pushing member along a first direction perpendicular to the sliding direction of the pushing member to form a blocking opening; the first opening is arranged at the other end of the leakage-proof piece; in a separated state, the first opening is closer to the blocking opening and faces the embolectomy support; in the collection state, the blocking port applies a blocking force to the thrombectomy support.
Optionally, in the bolt removing mechanism, a first limiting member is fixed to the pushing member, and the first limiting member is located between the bolt removing bracket and the blocking opening; the cross-sectional area of the first limiting part in the first direction is larger than or equal to that of the blocking port in the first direction, and in the collecting state, the blocking port applies blocking force to the bolt taking bracket by applying the blocking force to the first limiting part.
Optionally, in the above embolectomy mechanism, the proximal end of the embolectomy support is fixed on the distal end of the pushing member; the proximal end of the anti-leakage part is closer to the proximal end of the pushing part than the proximal end of the embolectomy bracket;
the distal end of the leakage-proof piece is provided with the first opening, and the proximal end of the leakage-proof piece is provided with the blocking opening.
Optionally, in the bolt removing mechanism, a second limiting member is further fixed to the pushing member, and the second limiting member and the first limiting member are distributed on two sides of the blocking opening; the cross-sectional area of the second limiting piece in the first direction is larger than or equal to the cross-sectional area of the blocking opening in the first direction.
Optionally, in the bolt removing mechanism, the first limiting member and/or the second limiting member are annular, and the pushing member is fixedly sleeved with the first limiting member and/or the second limiting member.
Optionally, in the above bolt removing mechanism, an inner diameter of the leakage-proof member gradually decreases from the first opening toward the blocking opening.
Optionally, in the thrombus removal mechanism, the thrombus removal support includes a plurality of ribs extending along the sliding direction of the pushing member and arranged along the first direction, and any of the ribs is distributed in a sinusoidal manner;
in any adjacent three ribs, the wave trough of the rib positioned in the middle is connected with the wave crest of the rib on one side, and the wave crest of the rib positioned in the middle is connected with the wave trough of the rib on the other side;
in two adjacent ribs, a capturing mesh is enclosed between two adjacent wave crests of one rib and two adjacent wave troughs of the other rib.
Optionally, in the thrombus removal mechanism, the proximal ends of all the ribs are fixedly converged into a first end part as the proximal end of the thrombus removal support; at the far ends of all the ribs, the far ends of every two ribs are fixedly converged into a second end part, and all the second end parts are used as the far ends of the embolectomy brackets.
Optionally, in the above bolt removing mechanism, all the ribs are distributed on the same cylindrical surface, and the second end portion is inclined toward the radial direction of the cylindrical surface.
Optionally, in the above embolectomy mechanism, at least one visualization mark is provided on at least a proximal end of the embolectomy support along a sliding direction of the embolectomy support.
A delivery device, further comprising:
a delivery tube having a receiving cavity;
the embolectomy mechanism of any of the above claims; the pushing piece is slidably arranged in the containing cavity of the conveying pipe, and the proximal end of the pushing piece extends out of the proximal end of the conveying pipe;
the thrombus taking support and the leakage-proof piece can be switched between a furled state of furling in the containing cavity and a spread and unfolded release state of extending out of the conveying pipe when sliding;
the thrombus taking support and the leakage-proof piece are both made of deformable medical materials.
Optionally, the delivery device further includes a catheter and a release tube slidably sleeved outside the pushing member and located inside the delivery tube, and the catheter is sleeved outside the release tube; the pushing member is positioned in the release pipe;
the near end of the leakage-proof piece is fixed on the far end of the catheter and can be sleeved outside the release pipe, and the first opening is arranged on the far end of the leakage-proof piece; the leakage-proof piece is switched between a folded state and a released state at least by the sliding of the conduit;
the thrombus removal support pushed by the pushing piece can be switched between a contraction state of contracting in the inner cavity of the release pipe and a free state of extending out of the release pipe; in a free state, the bolt taking bracket can slide in the accommodating cavity of the anti-leakage part under the driving of the pushing part so as to switch between the separation state and the collection state; under the collecting state, the collecting device is driven by the sliding of the guide pipe to switch between a folding state and a releasing state.
The technical scheme of the invention has the following advantages:
1. the invention provides a bolt taking mechanism, which comprises: a pushing member; the thrombus taking bracket is fixed on the far end of the pushing member; the anti-leakage piece is in a net shape; the anti-leakage part is sleeved on the pushing part in a sliding mode and is provided with an accommodating cavity with one end being provided with a first opening; the bolt taking support is driven by the pushing piece to slide, can be accommodated in the accommodating cavity of the anti-leakage piece through the first opening, is limited in the collecting state of the accommodating cavity by the blocking force, and is switched between the separating state of retreating out of the accommodating cavity by releasing the blocking force.
In the thrombus taking mechanism with the structure, the thrombus taking support and the leakage-proof piece are respectively arranged on the pushing piece, wherein the leakage-proof piece is sleeved on the pushing piece in a sliding manner, the pushing piece pushes the thrombus taking support to the position of thrombus to be captured to complete the capturing action, the effect of pulling back the thrombus taking support is realized by operating the pushing piece, in the process of pulling back the thrombus taking support, the leakage-proof piece and the thrombus taking support move relatively, so that the thrombus taking support is accommodated in the accommodating cavity of the leakage-proof piece, in the process of pulling back the pushing piece, the leakage-proof piece can protect the thrombus on the thrombus taking support from being touched by the blood vessel wall, the situation that the thrombus or blood clot on the thrombus taking support touches the blood vessel wall and then falls off from the thrombus taking support in the process of pulling back the thrombus taking support is avoided when the thrombus on the thrombus taking support is captured by the thrombus taking support and pulled back towards the near end of the thrombus to exit the blood vessel, the blocking force is relieved, so that the thrombus taking support and the leakage-proof piece are in a separated state, and the thrombus can be smoothly captured by the thrombus taking support.
2. In the bolt taking mechanism provided by the invention, one end of the anti-leakage part is folded towards the pushing part along the first direction perpendicular to the sliding direction of the pushing part to form a blocking opening; the first opening is arranged at the other end of the leakage-proof piece; in a separated state, the first opening is closer to the blocking opening and faces the embolectomy support; in the collection state, the blocking port applies a blocking force to the thrombectomy support.
In the bolt taking mechanism with the structure, the first opening of the anti-leakage part is folded towards one end close to the pushing part to form a blocking opening, and in a separated state, the first opening is close to the blocking opening and faces the bolt taking support; in a collection state, the blocking port blocks the thrombus taking support, after the thrombus or blood clot is captured by the thrombus taking support, the leakage-proof piece is sleeved on the pushing piece in a sliding manner, so that in the process of pulling back the thrombus taking support, the leakage-proof piece can be acted by blood and blood vessel walls, the leakage-proof piece moves towards the thrombus taking support along the pushing rod, and after the thrombus taking support is stored in the containing cavity of the leakage-proof piece, the blocking port can exert blocking force on the thrombus taking support, so that the thrombus taking support can be stably stored in the leakage-proof piece, and at the moment, the leakage-proof piece and the thrombus taking support are in a collection state; when the thrombus or blood clot to be captured is approached by the thrombus or blood clot to be captured, the first opening of the leakage-proof piece is arranged towards the thrombus or blood clot to be captured, so that the thrombus or blood clot can enter the accommodating cavity of the leakage-proof piece along the first opening.
3. In the bolt taking mechanism provided by the invention, a first limiting piece is fixed on the pushing piece and is positioned between the bolt taking bracket and the blocking opening; the cross-sectional area of the first limiting part in the first direction is larger than or equal to that of the blocking port in the first direction, and in the collecting state, the blocking port applies blocking force to the bolt taking bracket by applying the blocking force to the first limiting part.
In the bolt taking mechanism with the structure, the first limiting part is arranged between the bolt taking support and the blocking opening, when the blocking opening of the leakage-proof part moves to the first limiting part, because the sectional area of the first limiting part in the first direction is larger than or equal to that of the blocking opening in the first direction, the leakage-proof part can be blocked by the first limiting part and cannot continue to slide on the pushing part, and the limiting effect on the leakage-proof part is realized.
4. In the bolt taking mechanism provided by the invention, the inner diameter of the anti-leakage part is gradually reduced from the first opening to the blocking opening. The inner diameter of the leakage-proof piece is set to be a structure that the first opening faces the blocking opening and is gradually reduced, so that when the embolectomy support is pulled back, the end with the smaller inner diameter on the leakage-proof piece is driven by the pushing piece to prop open the blood vessel, then the end with the larger inner diameter of the leakage-proof piece is transited to, and the leakage-proof piece carrying the embolectomy support can be smoothly taken out of the blood vessel.
5. In the bolt taking mechanism provided by the invention, the bolt taking bracket comprises a plurality of ribs which extend along the sliding direction of the pushing piece and are arranged along the first direction, and any rib is distributed in a sine curve; in any adjacent three ribs, the wave trough of the rib positioned in the middle is connected with the wave crest of the rib on one side, and the wave crest of the rib positioned in the middle is connected with the wave trough of the rib on the other side; in two adjacent ribs, a capturing mesh is enclosed between two adjacent wave crests of one rib and two adjacent wave troughs of the other rib.
In the mechanism is tied to getting of this structure, through in will getting tied the support the rib is sinusoidal distribution and sets up, and in adjacent three rib, through the setting of phase difference for get tied the support and when catching the thrombus, get tied the support expansion more steady, powerful, and can not cut off the thrombus after getting tied the support and catching the thrombus.
6. In the bolt taking mechanism provided by the invention, all the ribs are distributed on the same cylindrical surface, and the second end part deflects towards the radial direction of the cylindrical surface.
In the thrombectomy mechanism of this structure, through with the rib distributes on same face of cylinder, the radial slope of the second tip towards the face of cylinder that the distal end of every two ribs formed for when the thrombectomy support caught the thrombus, the rib of second tip can be firmly fixed with the thrombus of embedding on the thrombectomy support.
7. The invention provides a conveying device, which further comprises: a delivery tube having a receiving cavity; the embolectomy mechanism of any of the above claims; the pushing piece is slidably arranged in the containing cavity of the conveying pipe, and the proximal end of the pushing piece extends out of the proximal end of the conveying pipe; the thrombus taking support and the leakage-proof piece can be switched between a furled state of furling in the containing cavity and a spread and unfolded release state of extending out of the conveying pipe when sliding; the thrombus taking support and the leakage-proof piece are both made of deformable medical materials.
In the conveying device with the structure, any one of the bolt removing mechanisms is adopted, so that the conveying device has any one of the advantages of the bolt removing mechanism, the pushing piece is arranged in the containing cavity of the conveying pipe in a sliding way, after the thrombus taking support and the leakproof piece are placed on the push rod, the push rod is operated to slide in the conveying pipe, so that the embolectomy bracket and the leak-proof piece can be switched between being accommodated in the accommodating cavity and extending out of the delivery pipe, after the delivery pipe is inserted into the blood vessel and approaches to the position of the blood vessel, the thrombus taking support extends out of the containing cavity in the delivery pipe to capture thrombus, when the thrombus taking support extends out of the delivery pipe, the thrombus is successfully captured, the thrombus taking support and the leak-proof piece can be pulled back into the conveying pipe again for secondary or multiple times of catching, the conveying device is not required to be integrally taken out of the blood vessel and then placed again, and the operation is convenient.
8. The conveying device further comprises a guide pipe and a release pipe, wherein the guide pipe and the release pipe are slidably sleeved outside the pushing part and are positioned in the conveying pipe; the pushing member is positioned in the release pipe;
the near end of the leakage-proof piece is fixed on the far end of the catheter and can be sleeved outside the release pipe, and the first opening is arranged on the far end of the leakage-proof piece; the leakage-proof piece is switched between a folded state and a released state at least by the sliding of the conduit; the thrombus removal support pushed by the pushing piece can be switched between a contraction state of contracting in the inner cavity of the release pipe and a free state of extending out of the release pipe; in a free state, the bolt taking bracket can slide in the accommodating cavity of the anti-leakage part under the driving of the pushing part so as to switch between the separation state and the collection state; under the collecting state, the collecting device is driven by the sliding of the guide pipe to switch between a folding state and a releasing state.
In the conveying device with the structure, the anti-leakage part is arranged at one end of the catheter by arranging the sleeved catheter and the release pipe, the pushing part is arranged in the release pipe, so that the position of the anti-leakage part and the position of the thrombus taking support can be independently controlled and adjusted by an operator, and the thrombus taking support can be rapidly accommodated in the accommodating cavity of the anti-leakage part after the thrombus is captured by the thrombus taking support; or before the conveying device is inserted into the blood vessel, one end of the conveying pipe is externally connected with a negative pressure pumping device, after the conveying pipe is inserted into the blood vessel, thrombus is adsorbed on the thrombus taking support through negative pressure pumping, then the catheter is driven to extend the leakage-proof piece out of the conveying pipe, and the thrombus taking support is stored and protected; when the thrombus is not captured by the thrombus taking support, the thrombus taking support can be folded into the inner cavity of the catheter, and the thrombus is captured by releasing the thrombus taking support from the catheter again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a bolt-removing mechanism provided in a first embodiment of the present invention;
FIG. 2 is a schematic view of a thrombectomy support structure;
FIG. 3 is a schematic diagram of the position of a release tube, a delivery tube and a thrombectomy support provided in the third embodiment of the present invention;
description of reference numerals:
1-thrombus taking support; 11-ribs; 12-a first end portion; 13-a second end; 14-capture mesh; 15-trough of wave; 16-wave peak;
2-a leakage-proof piece; 21-blocking port; 22-a first opening;
3-a pushing member;
4-a first stop; 5-a second limiting member;
6-release tube; 7-development marking; 8-conveying pipe;
9-a catheter;
l1-first ribs; l2-second ribs; l3-third ribs.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The terms "proximal" and "distal" used herein to describe positions and orientations refer to an operator of the instrument (not shown), with the end closer to the operator being the proximal end and the end farther from the operator being the distal end.
Example 1
The embodiment describes a thrombus removal mechanism, which comprises a pushing member 3, a thrombus removal support 1 and a leakage-proof member 2, wherein the plug taking bracket 1 is fixed on the near end of the pushing member 3, the anti-leakage member 2 is slidably sleeved on the pushing member 3, the anti-leakage member 2 is arranged in a net shape, the body is provided with a plurality of net openings, the size of the net openings is between 0.1 and 1mm, blood in the blood vessel can pass through the net openings, but small blood clots of thrombus can not pass through the net openings and are blocked in the leakage-proof part 2, the pushing rod can be set to be a solid rod shape, the bolt taking bracket 1 is fixed on the near end of the rod, the leakage-proof piece 2 is sleeved on the rod and slides, wherein, a first opening 22 can be arranged at one end of the leak-proof piece 2, an accommodating cavity is arranged along the first opening 22, the collection state and the separation state exist between the thrombus taking support 1 and the leakage-proof piece 2 by operating the pushing piece 3;
in this embodiment, in the collection state, the thrombus taking support 1 can enter the accommodating cavity through the first opening 22 and be accommodated in the accommodating cavity under the driving of the sliding of the pushing member 3, and after the thrombus taking support 1 is accommodated in the accommodating cavity, the thrombus taking support 1 can be limited in the accommodating cavity by the blocking force, so that the thrombus taking support 1 can be stably accommodated in the accommodating cavity after the thrombus is captured, the situation that the thrombus taking support 1 is pulled back to be released from the leakage-proof member 2 by the thrust is avoided, and the situation that the thrombus captured on the thrombus taking support 1 is contacted and rubbed with the blood vessel wall to cause the thrombus or blood clot to fall off from the thrombus taking support 1 due to the fact that the thrombus is accommodated in the accommodating cavity is effectively avoided because the thrombus taking support 1 is accommodated in the accommodating cavity; in the separated state, the bolt taking bracket 1 is in the state of being released from the blocking force, so the bolt taking bracket can retreat out of the accommodating cavity along the first opening 22 of the leakage-proof piece 2;
in the thrombus taking operation process, when a blood vessel is blocked by thrombus, the thrombus can be restrained by the blood vessel wall, so that small-particle thrombus hidden in the thrombus can not fall off from the whole thrombus, but in the process that the thrombus is captured, pulled back and dragged by the thrombus taking support, the thrombus is positioned in the anti-leakage part and is not restrained by the blood vessel wall, so that the thrombus can be loosened in the blood vessel, at the moment, the small-particle thrombus hidden in the thrombus can drift out from the whole thrombus and can flow into the blood vessel, the anti-leakage part is arranged to realize the blocking force of the drifted small-particle thrombus, the thrombus is restrained by the anti-leakage part, the thrombus is tightly attached to the anti-leakage part, the quantity of the fallen small-particle thrombus entering the blood vessel is reduced, the phenomenon that a large number of small-particle thrombus flows into the blood vessel can be avoided, and the thrombus taking effect is not ideal.
In this embodiment, referring to fig. 1, specifically, one end of the anti-leakage member 2 is folded toward the pushing member 3 along a first direction perpendicular to the sliding direction of the pushing member 3 to form a blocking opening 21 capable of applying a blocking force to the bolt-removing bracket 1, and the first opening 22 is disposed at the other end of the anti-leakage member 2; in the separated state, the first opening 22 is closer to and faces the bolt taking support 1 than the blocking opening 21, in the collected state, the leakage-proof piece 2 moves to the state of containing the bolt taking support 1 relative to the bolt taking support 1, and at the moment, the blocking opening 21 exerts blocking force on the bolt taking support 1 so as to limit the bolt taking support 1 to move continuously in the accommodating cavity;
specifically, a first limiting member 4 and a second limiting member 5 may be fixedly disposed on the pushing member 3, the first limiting member 4 is located between the bolt-removing bracket 1 and the blocking opening 21, the second limiting member 5 is disposed on the other side of the blocking opening 21, at this time, the first blocking opening 21 and the second blocking opening 21 are distributed on two sides of the blocking opening 21, and the cross-sectional area of the first limiting member 4 and the cross-sectional area of the second limiting member 5 in the first direction are greater than or equal to the cross-sectional area of the blocking opening 21 in the first direction, so as to implement: in the collecting state, the blocking port 21 can apply a blocking force to the bolt taking bracket 1 by applying a blocking force to the first limiting member 4, so that the bolt taking bracket 1 is limited in the leakage-proof member 2; when the blocking port 21 does not apply a blocking force to the embolectomy support 1, the embolectomy support 1 and the leakage-proof piece 2 are in a separated state, and in the separated state, the second limiting piece 5 can move towards the far end of the pushing piece 3 along the pushing piece 3 due to the fact that the leakage-proof piece 2 is pushed by blood pressure, so that when the leakage-proof piece 2 moves to the position of the second limiting piece 5, the leakage-proof piece can be blocked by the second limiting piece 5 and cannot slide along the pushing piece 3, the situation that the distal end of the leakage-proof piece 2 is far away from the near end of the embolectomy support 1, and the embolectomy support 1 can be stored into the leakage-proof piece 2 only by moving a long distance when the pushing piece 3 is pulled back is avoided;
in this embodiment, the first limiting member 4 and the second limiting member 5 may be annular and fixedly sleeved on the pushing member 3, or the first limiting member 4 and the second limiting member 5 may be convex or boss-shaped and can limit the leakage-proof member 2.
Wherein, the proximal end of the embolectomy stent 1 can be fixed on the distal end of the pushing element 3, the proximal end of the leakproof element 2 is closer to the proximal end of the pushing element 3 than the proximal end of the embolectomy stent 1, the distal end of the leakproof element 2 is arranged as the first opening 22, the proximal end of the leakage preventing part 2 is provided with a blocking opening 21, in this way, the bolt taking bracket 1 is positioned between the leakage preventing part 2 and the pushing part 3, therefore, after the thrombus removal stent 1 is collected in the leakproof part 2, when the thrombus removal stent 1 is pulled back in the blood vessel, the end of the first opening 22 at the distal end of the leak protector 2 does not come into direct contact with the blood vessel having a smaller inner diameter, and then avoid the condition emergence of scratch even scrape the vascular wall, the setting of leak protection piece 2 has realized having protected the thrombus on the thrombectomy support 1 not touch the effect that drops by the vascular wall, can protect the effect that the vascular wall can not scraped even by the scratch simultaneously again.
Wherein, can be with the internal diameter of above-mentioned leak protection 2 by first opening 22 towards blocking mouthful 21 setting and reduce gradually for leak protection 2 is whole to be hourglass hopper-shaped, through set up leak protection 2 internal diameter into by first opening 22 is towards the structure that blocks mouthful 21 and reduce gradually, consequently when pulling back and get bolt support 1, the less one end of internal diameter can strut the blood vessel earlier under the drive of propelling movement piece 3 on leak protection 2, then transitions to the great one end of 2 internal diameters of leak protection, can smoothly take out from the blood vessel with carrying leak protection 2 who gets bolt support 1.
In this embodiment, referring to fig. 1 and 2, the thrombus-taking support 1 includes a plurality of ribs 11, the ribs 11 can extend along the sliding direction of the pushing member 3 and are arranged along a first direction, wherein each rib 11 is distributed in a sinusoidal manner, in any adjacent three ribs 11, a wave trough 15 of the rib 11 located in the middle is connected with a wave crest 16 of the rib 11 on one side, a wave crest 16 of the rib 11 located in the middle is connected with a wave trough 15 of the rib 11 on the other side, and a phase difference exists between any wave crest 16 and the wave trough 15 connected therewith, so that the thrombus-taking support 1 can have a sufficiently large and uniform supporting force in the process of capturing thrombus and cannot cut the thrombus; in two adjacent ribs 11, two adjacent peaks 16 of one rib 11 and two adjacent valleys 15 of the other rib 11 enclose a capture mesh 14 for capturing thrombus, so that the thrombus is embedded into the ribs 11, and the peak 16 of the rib 11 located in the middle is connected with the valley 15 of the rib 11 on the other side;
after the wave trough 15 of the middle rib 11 is connected with the wave crest 16 of the rib 11 on one side, and the wave crest 16 of the middle rib 11 is connected with the wave trough 15 of the rib 11 on the other side, in order to provide stable and uniform supporting force for the embolectomy stent 1 in the process of capturing thrombus, the wave trough 15 of the middle rib 11 and the wave crest 16 of the rib 11 on one side in any adjacent three ribs 11 can be connected in a facing manner, the wave crest 16 of the middle rib 11 and the wave trough 15 of the rib 11 on the other side are connected in a staggered manner, referring to fig. 2, taking a first rib L1, a second rib L2 and a third rib L3 as an example, the wave crest of the first rib L1 and the wave trough of the third rib L3 are arranged in a staggered manner when connected, the wave trough of the first rib L1 and the wave trough of the second rib L2 are arranged in a facing manner when connected, so that a connection structure exists between the wave troughs 16 of the first rib L1 and the wave trough of the second rib L2 in the embolectomy stent 1 after molding, therefore, the thrombus taking support 1 has enough and uniform supporting force, the thrombus can be stably fixed on the thrombus taking support 1, and the thrombus is not cut off.
Referring to fig. 2, in the present embodiment, the proximal ends of all the ribs 11 are fixedly converged into a first end portion 12, which serves as the proximal end of the embolectomy stent 1; at the distal ends of all the ribs 11, the distal ends of every two ribs 11 can be fixedly converged to form a second end 13, all the second ends 13 are used as the distal ends of the embolectomy stent 1, for example, the distal end of the rib L1 and the distal end of the rib L2 are fixedly converged to form the second end 13, and the proximal ends of the first rib L1, the second rib L2 and the third rib L3 are converged to form the first end 12;
wherein after the 1 shaping of support is tied in getting, will get and tie support 1 and spread, be the fan-shaped form, in order to make and tie support 1 when catching the thrombus, the realization will be embedded into and tie the thrombus on support 1 and firmly carry out the effect of fixing, can distribute all ribs 11 on same face of cylinder, and second end 13 is towards the radial skew of this face of cylinder for the distal end of getting tie support 1 has the second end of a plurality of adduction, can firmly fix the thrombus on getting tie support 1.
In this embodiment, in the thrombus removal mechanism, along the sliding direction of the thrombus removal stent 1, a development mark 7 may be provided on the proximal end of the thrombus removal stent 1, so as to play a role of indicating a position when the thrombus removal stent 1 is inserted into a blood vessel, and may be provided on the proximal end of the thrombus removal stent 1, wherein the development mark 7 may be provided on the proximal end of the rib 11, the distal end of the rib 11, or the body of the leakage preventing member 2, specifically, the development mark 7 may be one, two, or three, and the specific number is arranged according to an actual use condition, and the development mark 7 is made of a noble metal development material, which may be tungsten steel, platinum alloy, gold, or palladium gold.
Example 2
The present embodiment describes a delivery device, which is different from embodiment 1 in that, referring to fig. 1, the delivery device of this embodiment further includes a delivery tube 8, the delivery tube 8 has a receiving cavity, the pushing member 3 can be slidably disposed in the receiving cavity of the delivery tube 8, and the proximal end of the pushing member 3 can extend out of the proximal end of the delivery tube 8 to capture thrombus or blood clots;
in the embodiment, the thrombus taking support 1 and the leakage preventing member 2 can be switched between a furled state of being furled in the containing cavity and a spread release state of being extended out of the delivery pipe 8 when sliding, specifically, when the delivery device is inserted into a blood vessel, the thrombus taking support 1, the leakage preventing member 2 and the pushing member 3 are furled in the containing cavity of the delivery pipe 8, when the distal end of the delivery pipe 8 moves to a position close to thrombus in the blood vessel, the insertion of the delivery pipe 8 is stopped, then an operator pushes the pushing member 3 to the distal end of the delivery pipe 8 to push the thrombus taking support 1 at the distal end of the pushing member 3 out of the delivery pipe 8 in a sliding way, when the thrombus taking support 1 is pushed out from the delivery pipe 8, the ribs 11 are spread and each capture net mouth is spread to capture thrombus or blood clots, when the thrombus taking support 1 is released from the delivery pipe to capture thrombus, because the anti-leakage part 2 is sleeved on the pushing part 3, the movement speed of the anti-leakage part 2 is greater than that of the pushing part 3, the anti-leakage part 2 can move towards the second limiting part 5 relative to the pushing part 3, after the anti-leakage part 2 moves to the second limiting part 5, the blocking port 21 at the near end of the anti-leakage part 2 can be blocked by the second limiting part 5, so that in the process that the thrombus taking support is released from the conveying pipe 8 to capture thrombus, the anti-leakage part 2 is in a state of being folded in the conveying pipe 8, and at the moment, the anti-leakage part and the thrombus taking support are in a separated state;
after the thrombus is captured by the thrombus taking support 1, the delivery pipe 8 is withdrawn, so that the leak-proof part 2 is exposed out of the delivery pipe 8, then the pushing part 3 is pulled back, the thrombus taking support 1 is moved towards the near end of the delivery pipe along with the thrombus, the moving speed of the leak-proof part 2 is also greater than that of the pushing part 3, therefore, the leak-proof part 2 can move towards the first limiting part 4 relative to the pushing part 3, the thrombus taking support 1 enters the accommodating cavity of the leak-proof part 2 along the first opening and accommodates the thrombus taking support 1, the blocking opening 21 at the near end of the leak-proof part 2 can be blocked by the first limiting part 4, the relative movement of the thrombus taking support 1 and the leak-proof part 2 is stopped, the thrombus taking support and the leak-proof part 2 are pulled back as a whole, and the thrombus capturing action is successful;
when the thrombus is not successfully captured after the thrombus removal stent 1 is released from the conveying pipe 8, the conveying pipe 8 is continuously inserted towards the far end of the blood vessel, the thrombus removal stent 1 is entirely folded into the conveying pipe 8 along the near end of the thrombus removal stent 1 towards the far end, and the pushing piece 3 is operated again to push the thrombus removal stent 1 out of the conveying pipe 8 so as to capture the thrombus.
Specifically, in a furled state, the embolectomy support 1 and the leakage-proof piece 2 are integrally contained in the conveying pipe 8; in a release state, the near end of the embolectomy support 1 is located outside the containing cavity of the delivery pipe 8, the leakage-proof piece 2 is located in the containing cavity of the delivery pipe 8, the blocking opening 21 of the leakage-proof piece 2 is located at the second limiting piece 5 and limited by the second limiting piece 5 to slide on the pushing piece 3, the far end of the leakage-proof piece 2 is located at a position far away from the joint of the near end of the embolectomy support 1 and the far end of the pushing piece 3, so that the leakage-proof piece 2 and the embolectomy support 1 can be completely separated, the embolectomy support 1 can smoothly capture thrombus or blood clots, the embolectomy support 1 and the leakage-proof piece 2 are both made of deformable medical materials and can be folded into the delivery pipe 8, the leakage-proof piece 2 can be made of superelastic nickel-titanium alloy, the forming mode can be woven or carved into a net shape, and the pushing piece 3 and the embolectomy support 1 can be made of nickel.
Example 3
The difference between this embodiment and embodiment 2 is that this embodiment further provides a guide tube and a release tube, referring to fig. 3, the guide tube 9 is sleeved outside the release tube 6, the guide tube 9 is located inside the delivery tube 8, and the pushing member 3 is located inside the release tube 6;
the thrombus taking support 1 is positioned at the far end of the pushing element 3, the first opening of the thrombus taking support 1 is arranged at the far end of the leakage-proof element 2, the thrombus taking support 1 can be switched between a contraction state of contracting in the inner cavity of the releasing pipe 6 and a free state of extending out of the releasing pipe 6 under the drive of the pushing element 3, wherein in the free state, the thrombus taking support 1 can also slide in the containing cavity of the leakage-proof element 2 under the drive of the pushing element 3 to be switched between a separation state and a collection state, and in the collection state, the thrombus taking support is switched between a folding state and a releasing state under the drive of the sliding of the catheter 9;
when the thrombus taking mechanism is in a position close to thrombus, the pushing member 3 is pushed to slide along the release tube 6, so that the thrombus taking support 1 can be released from the release tube 6 to capture the thrombus under the pushing action of the pushing member 3, the leakage-proof member 2 is positioned in the catheter 9, the thrombus taking support 1 is in a free state to finish the action of capturing the thrombus, the leakage-proof member is in a furled state furled in the catheter 9, and the leakage-proof member 2 and the thrombus taking support 1 are in a separated state;
after thrombus successfully captured by the thrombus taking support 1 moves towards the proximal end of the blood vessel through withdrawing the conveying pipe 8 and the releasing pipe 6, the distal end of the guide pipe 9 and the leakage-proof part 2 are exposed out of the conveying pipe 8, the leakage-proof part 2 is in a releasing state, after the releasing pipe 6 moves towards the proximal end of the blood vessel, the releasing pipe 6 between the leakage-proof part 2 and the pushing part 3 is completely removed, no barrier exists between the leakage-proof part 2 and the pushing part 3, at the moment, the pushing part 3 is pulled back, the thrombus taking support 1 at the distal end of the pushing part 3 can carry the captured thrombus into the accommodating cavity of the leakage-proof part 2, the thrombus taking support 1 is limited in the leakage-proof part 2, the thrombus taking support 1 and the leakage-proof part 2 are in a collecting state, finally, the thrombus is pulled back out of the blood vessel, the thrombus taking action is completed, the position of the leakage-proof part 2 is independently controlled through setting the guide pipe 9, and the thrombus taking support 1 is in the process of, the leakage-proof piece 2 can be completely released from the delivery pipe 8 and collects thrombus, so that the problem that the leakage-proof piece 2 cannot be released from the delivery pipe 8 and collects thrombus is avoided, and the thrombus taking support 1 can be quickly accommodated in the accommodating cavity of the leakage-proof piece 2;
in the embodiment, a negative pressure pumping device can be externally connected with the conveying device before the conveying device is inserted into the blood vessel, so that a cavity between the catheter 9 and the release pipe 6 forms negative pressure, after the conveying pipe 8 is inserted into the blood vessel, thrombus is adsorbed to the thrombus taking support 1 by pumping the negative pressure, then the catheter 9 is driven to extend the leakage-proof piece 2 out of the conveying pipe 8, and the thrombus taking support 1 is stored and protected;
when the thrombus is not captured when the thrombus stent 1 is released from the release tube 6, the thrombus can be captured by retracting the thrombus stent 1 again into the release tube 6 by operating the catheter 9 and releasing the thrombus stent 1 from the release tube 6 again.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (13)
1. A thrombectomy mechanism, comprising:
a pusher (3);
the thrombus taking support (1) is fixed on the far end of the pushing component (3);
a leakage-proof member (2) in a net shape; the anti-leakage part (2) is slidably sleeved on the pushing part (3) and is provided with an accommodating cavity with one end being a first opening (22);
the bolt taking support (1) is driven by the pushing piece (3) to slide, and can be switched between a collecting state and a separating state, wherein the collecting state is accommodated in the accommodating cavity of the leakage-proof piece (2) and is limited in the accommodating cavity by blocking force through the first opening (22), and the separating state is released by the blocking force to retreat out of the accommodating cavity.
2. The embolectomy mechanism of claim 1, wherein one end of the leakproof member (2) is folded toward the pushing member (3) along a first direction perpendicular to the sliding direction of the pushing member (3) to form a blocking opening (21); the first opening (22) is arranged at the other end of the leakage-proof piece (2); in the separated state, the first opening (22) is closer to the blocking opening (21) and faces the embolectomy support (1); in the collecting state, the blocking opening (21) exerts a blocking force on the thrombectomy support (1).
3. The embolectomy mechanism of claim 2, wherein a first limiting member (4) is fixed on the pushing member (3), and the first limiting member (4) is located between the embolectomy support (1) and the blocking opening (21); the cross-sectional area of the first limiting part (4) in the first direction is larger than or equal to that of the blocking opening (21) in the first direction, and in the collecting state, the blocking opening (21) exerts blocking force on the bolt taking bracket (1) by exerting blocking force on the first limiting part (4).
4. The embolectomy mechanism of claim 3, wherein the proximal end of the embolectomy support (1) is fixed to the distal end of the pusher (3); the proximal end of the anti-leakage part (2) is closer to the proximal end of the pushing part (3) than the proximal end of the embolectomy support (1);
the distal end of the leakage-proof piece (2) is provided with the first opening (22), and the proximal end of the leakage-proof piece is provided with the blocking opening (21).
5. The embolectomy mechanism of claim 3 or 4, wherein a second limiting member (5) is further fixed on the pushing member (3), and the second limiting member (5) and the first limiting member (4) are distributed on two sides of the blocking opening (21); the cross-sectional area of the second limiting piece (5) in the first direction is larger than or equal to the cross-sectional area of the blocking opening (21) in the first direction.
6. The embolectomy mechanism of claim 5, wherein the first limiting member (4) and/or the second limiting member (5) are annular and fixedly sleeved on the pushing member (3).
7. The embolectomy mechanism of any of claims 2-6, wherein the inner diameter of the leak protector (2) decreases from the first opening (22) towards the blocking opening (21).
8. The embolectomy mechanism of any of claims 1-7, wherein the embolectomy support (1) comprises a plurality of ribs (11) extending along the sliding direction of the pushing member (3) and arranged along a first direction, and any of the ribs (11) are distributed in a sinusoidal manner;
in any three adjacent ribs (11), the wave trough of the rib (11) positioned in the middle is connected with the wave crest of the rib (11) on one side, and the wave crest of the rib (11) positioned in the middle is connected with the wave trough of the rib (11) on the other side;
in two adjacent ribs (11), a capturing mesh is enclosed between two adjacent wave crests of one rib (11) and two adjacent wave troughs of the other rib (11).
9. The embolectomy mechanism of claim 8, wherein the proximal ends of all the ribs (11) are fixedly converged into a first end (12) as the proximal end of the embolectomy support (1); at the far ends of all the ribs (11), the far ends of every two ribs (11) are fixedly converged into a second end (13), and all the second ends (13) are used as the far ends of the embolectomy support (1).
10. The embolectomy mechanism of claim 9, wherein all the ribs (11) are distributed on the same cylindrical surface, and the second end (13) is inclined in the radial direction of the cylindrical surface.
11. The embolectomy mechanism of any of claims 1-10, wherein at least one visualization marker (7) is provided on at least the proximal end of the embolectomy support (1) in the direction of sliding of the embolectomy support (1).
12. A conveyor apparatus, comprising:
a delivery tube (8) having a receiving cavity;
the embolectomy mechanism of any of claims 1-11; the pushing piece (3) is slidably arranged in the containing cavity of the conveying pipe (8), and the proximal end of the pushing piece (3) extends out of the proximal end of the conveying pipe (8);
the thrombus taking support (1) and the anti-leakage piece (2) can be switched between a furled state of furling in the containing cavity and a spread release state of extending out of the conveying pipe (8) when sliding;
the thrombus taking support (1) and the anti-leakage part (2) are both made of deformable medical materials.
13. The delivery device according to claim 12, further comprising a guide tube (9) and a release tube (6) slidably sleeved outside the pushing member (3) and positioned inside the delivery tube (8), wherein the guide tube (9) is sleeved outside the release tube (6); the pushing member is positioned in the release pipe;
the near end of the leakage-proof piece (2) is fixed on the far end of the catheter and can be sleeved outside the release pipe, and the first opening (22) is arranged on the far end of the leakage-proof piece (2); the anti-leakage part (2) is switched between a folded state and a released state at least by the sliding of the guide pipe (9);
the thrombus taking support (1) can be switched between a contraction state of being contracted in the inner cavity of the release pipe and a free state of being extended out of the release pipe by a pushing piece (3); in a free state, the bolt taking bracket can slide in the accommodating cavity of the anti-leakage part (2) under the driving of the pushing part so as to switch between the separation state and the collection state; under the collecting state, the collecting device is driven by the sliding of the guide pipe to switch between a folding state and a releasing state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722492.0A CN111938747A (en) | 2020-07-24 | 2020-07-24 | Bolt taking mechanism and conveying device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722492.0A CN111938747A (en) | 2020-07-24 | 2020-07-24 | Bolt taking mechanism and conveying device |
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| CN111938747A true CN111938747A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010722492.0A Pending CN111938747A (en) | 2020-07-24 | 2020-07-24 | Bolt taking mechanism and conveying device |
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| CN112690872A (en) * | 2020-12-29 | 2021-04-23 | 上海璞慧医疗器械有限公司 | Thrombectomy support |
| CN113197619A (en) * | 2021-04-16 | 2021-08-03 | 天津大学 | Thrombus taking support adapting to intracranial vascular structure |
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| CN212547093U (en) * | 2020-07-24 | 2021-02-19 | 上海璞慧医疗器械有限公司 | Bolt taking mechanism and conveying device |
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| US20170333076A1 (en) * | 2014-11-07 | 2017-11-23 | National University Of Ireland, Galway | Thrombectomy device |
| CN107198554A (en) * | 2016-09-23 | 2017-09-26 | 赛诺医疗科学技术有限公司 | One kind takes bolt apparatus |
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