CN116158806A - Thrombus aspiration component and thrombus taking expansion device - Google Patents
Thrombus aspiration component and thrombus taking expansion device Download PDFInfo
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- CN116158806A CN116158806A CN202310457819.XA CN202310457819A CN116158806A CN 116158806 A CN116158806 A CN 116158806A CN 202310457819 A CN202310457819 A CN 202310457819A CN 116158806 A CN116158806 A CN 116158806A
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- 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
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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
- A61B2017/22072—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 instrument channel, e.g. for replacing one instrument by the other
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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
- 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
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Abstract
The invention provides a thrombus sucking component and a thrombus taking and expanding device, and relates to the technical field of medical equipment, wherein the thrombus sucking component comprises an operating handle, an outer sheath tube and a sucking catheter, and the operating handle comprises a handle shell and a driving piece movably mounted on the handle shell; the outer sheath tube and the handle shell are coaxially arranged in the handle shell, the distal end extends out of the handle shell, and the proximal end is fixedly or in transmission connection with the driving piece; the suction catheter passes through the outer sheath tube and is axially fixed on the handle shell, and the distal end of the suction catheter is provided with a braided outer flaring; the driving piece can axially slide relative to the handle shell so as to carry the outer sheath tube to axially slide back and forth relative to the handle shell, and the outer flaring of the suction catheter is restrained inside the outer sheath tube or released outside the outer sheath tube; the thrombus-removing expansion device comprises a thrombus expander and the thrombus suction assembly. The invention relieves a series of technical problems caused by the fact that the outer flaring of the distal end of the suction catheter in the existing thrombus taking and expanding device can not be restrained after being released.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a thrombus suction assembly and a thrombus extraction expansion device.
Background
The deep vein thrombosis is clinically common, can cause limb swelling and pain, can fall off to cause fatal pulmonary embolism, and can cause higher occurrence rate of lower limb deep vein thrombosis sequelae due to vein valve damage and blood reflux disorder in the later stage, wherein the occurrence rate comprises limb soreness, chronic edema, superficial vein expansion and varicose vein, chronic dermatitis, ulcer and the like of shank skin pigment, the living quality of patients is seriously influenced, and heavy economic burden is brought to families and society.
Clinical practice proves that the treatment means of the venous thrombus remover is easier to operate, the operation time is shortened, the treatment effectiveness is high, the bleeding rate is reduced, and the pain degree and the death rate of patients are reduced.
When the existing venous thrombus remover is clinically used, the existing venous thrombus remover is usually matched with an expansion device for use, a sheath tube of the thrombus remover and a self-expansion device for accommodating the tail end of the sheath tube of the thrombus remover are fixed by the expansion device before intervention into a human body, and after the expansion device is inserted into the human body, the expansion device releases the self-expansion device of the venous thrombus remover to present the form after expansion.
The stent generally comprises a suction catheter with an outer flare at the distal end and a vasodilator. The most commonly used matching structure and the action mode thereof can be obtained by referring to the prior published patent (a deep vein thrombosis removing device), application number 202211631642.2 and publication number CN115778486A, and the key extracts are as follows: during operation, the suction catheter is first led into blood vessel under the guiding action of the guide wire, the outer flaring of the distal end of the suction catheter is released and expanded through the expander, and then the expander is withdrawn, so that the compressed thrombus-taking support enters the blood vessel through the suction catheter under the driving of the conveying assembly. After the thrombus taking support passes through the embolism part in the blood vessel, the thrombus taking support is expanded and expanded by controlling the conveying component, and thrombus in the blood vessel is collected in a form of dragging after the thrombus taking support is completely released, so that the thrombus is collected and contained in the thrombus taking support. After collection, the thrombus taking support is elastically contracted by controlling the conveying component, thrombus is cut at the same time, the contracted thrombus taking support is retracted into the suction catheter through the outer flaring, and the thrombus at the outer flaring part is sucked and removed through an aspirator connected to the suction catheter at the same time (paragraphs [0051] to [0053] of the publication); the dilator is used in cooperation with the suction catheter, the suction catheter and the dilator are arranged separately, the dilator is detachably inserted into the suction catheter and extends out from the distal end of the suction catheter, and the dilator is mainly used for elastically deforming the outer flaring and binding the outer flaring in the process of conveying the suction catheter so that the tip of the suction unit can normally enter into a deep vein. In particular, the distal end of the dilator includes a tip structure to facilitate passage of the aspiration unit in the blood vessel. The tip structure is provided with an annular groove for binding the outer flaring, the outer flaring in a compressed state is accommodated in the annular groove, after the suction catheter reaches a target position under the guiding action of the guide wire, the dilator is pushed to separate the dilator from the suction catheter, and the outer flaring is free from the binding of the annular groove to realize the expansion "(publication [0076], [0077] paragraphs), and the drawing is combined with the publication of the publication.
According to the above description, the cooperation of the venous thrombolysis device and the expansion device has positive curative effect on the treatment of most patients, but at the same time, the healthcare workers also find some problems, mainly including: in the expanding device, the outer flaring at the distal end of the suction catheter is released by withdrawing the outer flaring from the tip end part of the distal end of the expander, so that the outer flaring at the distal end of the suction catheter can not be bound again after being released for only 1 release opportunity, the operation difficulty of an operator is increased, and the problems that the outer flaring can scratch the inner wall of a blood vessel, cause secondary damage to a puncture wound and the like during withdrawal are inevitably solved.
Disclosure of Invention
The invention aims to provide a thrombus sucking assembly and a thrombus taking and expanding device, which at least solve a series of technical problems caused by the fact that when a vein thrombus taking device and an expanding device in the prior art are matched, the outer flaring part at the far end of a sucking catheter cannot be bound again after being released.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
in a first aspect, embodiments of the present invention provide a thrombus aspiration assembly for use with a vasodilator, comprising an operating handle, an outer sheath, and an aspiration catheter; specifically, the operating handle comprises a handle shell with an axial inner cavity and a driving piece movably mounted on the handle shell; the outer sheath tube and the handle shell are coaxially arranged in the handle shell, the distal end of the outer sheath tube extends to the outside of the handle shell, and the proximal end of the outer sheath tube is fixedly or in transmission connection with the driving piece; the suction catheter passes through the outer sheath tube and is axially and fixedly connected to the handle shell, and the distal end of the suction catheter is provided with a braided outer flaring. Wherein: the driving piece is configured to axially slide relative to the handle housing to axially reciprocate relative to the handle housing with the outer sheath, thereby binding or releasing the outer flare of the aspiration catheter to the interior of the outer sheath.
Before use, the thrombus sucking assembly and the vessel dilator are assembled to form a thrombus taking and expanding device, specifically, a mandrel of the vessel dilator passes through an axial inner cavity of a handle shell and a sucking catheter until the distal end of the mandrel passes out of an outer flaring of the distal end of the sucking catheter; in addition, the axial position of the driving piece is adjusted relative to the handle shell, so that the outer flaring of the suction catheter is ensured to be bound in the outer sheath, namely, the outer flaring at the distal end of the suction catheter is kept in a contracted state;
then, the distal end of the assembled thrombus taking and expanding device is sent into a blood vessel, and the distal tip part of the mandrel is used as a guide head for quick introduction in the sending process;
after being guided into place, the vasodilator is withdrawn backwards at the proximal end of the handle shell, and then the driving piece is slid backwards relative to the handle shell so as to drive the outer sheath tube to slide backwards axially relative to the handle shell, so that the outer flaring of the suction catheter is released outside the outer sheath tube, and the outer flaring self-expands to form a funnel shape; at the moment, the thrombus is sucked by utilizing the suction port at the proximal end of the suction catheter, so that the thrombus in and around the external flaring can be sucked, and the thrombus can be quickly removed; in addition, the thrombus taking support can be additionally inserted into the suction catheter to assist thrombus taking, and the thrombus taking support can be withdrawn from the proximal end of the handle shell at any time;
after the whole thrombus taking action is finished, the axial position of the driving piece is adjusted relative to the handle shell again, so that the outer flaring of the suction catheter is ensured to be bound in the outer sheath, namely, the outer flaring of the distal end of the suction catheter is kept in a contracted state, and then the thrombus taking expansion device is withdrawn from the body of a patient after the whole thrombus taking expansion device is withdrawn.
In this embodiment, owing to set up operating handle and outer sheath, through utilizing the driving piece on the operating handle to control outer sheath relative handle shell axial slip in order to reach and release or retrain the function of the outer flaring of suction catheter distal end at any time as required, thereby, the operation degree of difficulty of art person has been reduced, and, after whole action of getting the bolt is accomplished, can shrink outer flaring earlier and withdraw from whole and get the bolt expansion device again, avoid outer flaring to pull back and scratch the vascular inner wall under the expansion state, and avoid outer flaring to follow the puncture mouth and take out when secondary injury patient wound, reduced patient's physical burden, reduced and get the complication risk of bolt operation in-process, be favorable to patient postoperative to resume.
In an alternative implementation of the present embodiment, it is preferable that the thrombus aspiration assembly further includes a hemostatic valve assembly; the hemostatic valve assembly comprises a suction hemostatic valve, an internal valve sealing ring and a hemostatic valve cover; the valve body of the suction hemostasis valve comprises a valve body main pipe and a valve body side pipe which is connected to one side of the valve body main pipe and is communicated with the interior of the valve body main pipe; the main valve body pipe is fixedly arranged in the axial inner cavity of the handle shell, and the proximal end of the suction catheter is connected with the distal end of the main valve body pipe in a sealing way; the valve body side pipe extends to the outside of the handle shell from an installation avoidance hole formed in the handle shell; the valve body main pipe is provided with a diameter-enlarging portion having a diameter that increases from the distal end toward the proximal end on the proximal end inner peripheral surface; the valve inner sealing ring is arranged in the proximal end of the main pipe of the valve body and is abutted against the proximal end side of the expanding part;
the hemostatic valve cover is in threaded sleeve connection with the handle shell or the valve body main pipe near end, the inner side surface of the hemostatic valve cover is provided with an extrusion bulge, and the hemostatic valve cover is provided with a thrombus pull outlet which axially penetrates through the hemostatic valve cover and is extruded bulge, the thrombus pull outlet is communicated with an inner hole of the valve inner sealing ring and an inner cavity of the valve body main pipe, and the hemostatic valve cover can be screwed or unscrewed at the handle shell or the valve body main pipe near end so as to extrude or release the valve inner sealing ring between the extrusion bulge and the far-end side inner wall of the expanding part.
In an alternative implementation manner of this embodiment, preferably, the handle housing is provided with an axial chute that radially penetrates through a wall of the handle housing, the driving member includes a driving tube and a driving wing connected to a side portion of the driving tube, the driving tube is disposed in an axial inner cavity of the handle housing and is sealed and slidingly sleeved outside the suction catheter, and a proximal end of the outer sheath is connected to a distal end of the driving tube in a sealing manner; the driving wing penetrates out of the handle shell from the axial sliding groove, so that the driving piece is axially and slidably arranged in the axial sliding groove.
Further preferably, a sliding aid is provided between the drive element and the axial inner cavity wall of the handle housing.
Still preferably, the sliding assisting piece comprises a ball, a protruding portion protruding toward the outside of the driving pipe is arranged on the side face of the driving pipe, a ball mounting groove is formed on one side, facing the axial inner cavity wall face of the handle shell, of the protruding portion, the ball is limited in the ball mounting groove, and a part of spherical surface of the ball protrudes out of the ball mounting groove and is in rolling contact with the axial inner cavity wall face of the handle shell.
Still further preferably, an axial ball limiting chute is provided on an axial inner cavity wall surface of the handle housing, and a portion of the ball facing the axial inner cavity wall surface of the handle housing is limited in the axial ball limiting chute.
Preferably, the driving member further comprises a sealing ring and a sealing ring retainer; the inner peripheral surface of the driving pipe fitting is provided with a boss protruding inwards in the radial direction, and the sealing ring is arranged between the inner peripheral surface of the driving pipe fitting and the outer peripheral surface of the suction catheter and is positioned on one side of the boss.
The seal ring retainer comprises a tubular main body, wherein the end face of a first end of the tubular main body in the axial direction extends outwards in the radial direction and then is bent towards a second end of the tubular main body in the axial direction so as to form a buckling groove; the tubular main body is sleeved outside the suction catheter in a sliding manner, the second end of the tubular main body is inserted into the driving pipe from one end of the driving pipe, the sealing ring is extruded between the second end face of the tubular main body and the side face of the boss, and one end, adjacent to the tubular main body, of the driving pipe is fastened in the fastening groove.
Preferably, a suction channel penetrating through the driving wing is arranged inside the driving wing, and the suction channel is communicated with the inner cavity of the driving pipe fitting and then communicated with the inner cavity of the outer sheath tube; and/or, setting a position clamping groove on one surface of the driving wing facing the outer wall of the handle shell and the positions on the outer peripheral wall of the handle shell, which are close to the two ends of the proximal end and the distal end of the axial sliding groove, and setting a position protrusion on the other surface of the driving wing so as to clamp the driving wing on the handle shell in two states that the outer flaring of the suction catheter is retracted into the outer sheath tube in the proximal direction or released into the outer sheath tube in the distal direction respectively.
More preferably, the suction catheter comprises a stainless steel connecting tube section and a suction tube section; the driving pipe fitting is sealed and sleeved outside the stainless steel connecting pipe section in a sliding mode, the proximal end of the suction pipe section is connected with the distal end of the stainless steel connecting pipe section in a sealing mode, and the outer flaring is arranged at the distal end of the suction pipe section.
In a second aspect, embodiments of the present invention provide a thrombolytic expansion device comprising a vasodilator and a thrombus aspiration assembly according to any one of the preceding embodiments; wherein the vasodilator comprises a mandrel with a tip at the distal end; in a first state, the mandrel passes through the axial lumen of the handle housing and the aspiration catheter, and in a second state, the mandrel is withdrawn from the operating handle.
Because the thrombus-taking and expanding device provided by the embodiment of the invention comprises the thrombus sucking assembly provided by the first aspect, the thrombus-taking and expanding device provided by the embodiment of the invention can achieve all the beneficial effects achieved by the thrombus sucking assembly provided by the first aspect, and in addition, the expander can assist the distal end of the outer sheath tube and the distal end of the sucking catheter to quickly and smoothly enter the blood vessel of a patient and reach the target position.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of the overall structure of a thrombus aspiration assembly provided in an embodiment of the present invention in which the outer flare of the aspiration catheter is released in the distal direction from the outer sheath tube;
FIG. 2 is a front cross-sectional view of FIG. 1;
FIG. 3 is a front cross-sectional view of a handle housing in a thrombus aspiration assembly provided in an embodiment of the present invention;
FIG. 4 is a top view showing a connection structure between a driving member and an outer sheath in a thrombus aspiration assembly according to an embodiment of the present invention;
FIG. 5 is a front cross-sectional view of a connection structure between a driving member and an outer sheath in a thrombus aspiration assembly according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;
fig. 7 is a schematic view of the overall structure of a hemostatic valve assembly in a thrombus aspiration assembly according to an embodiment of the present invention;
FIG. 8 is a front cross-sectional view of FIG. 7;
FIG. 9 is a schematic view showing the overall structure of a suction catheter in the thrombus aspiration assembly according to the embodiment of the present invention;
FIG. 10 is a front cross-sectional view of FIG. 9;
fig. 11 is a schematic view of the overall structure of a vasodilator in the thrombolytic expansion device according to the embodiment of the present invention;
FIG. 12 is a front cross-sectional view of FIG. 11;
FIG. 13 is a front view showing the overall structure of the thrombolysis expanding device according to the embodiment of the present invention in a state that the outer flaring of the aspiration catheter is retracted into the outer sheath in the proximal direction;
FIG. 14 is a front cross-sectional view of FIG. 13;
fig. 15 is a B-B cross-sectional view of fig. 14.
Icon: 1-an operating handle; 11-a handle housing; 111-axial sliding grooves; 112-axial ball limit chute; 113-positioning clamping grooves; 12-a driving member; 121-driving the pipe fitting; 122-driving wings; 1220-suction channel; 1221-positioning protrusions; 123-balls; 124-sealing ring; 125-seal ring holder; 2-an outer sheath; 3-aspiration catheter; 30-flaring; 31-stainless steel connecting pipe sections; 32-suction tube sections; a 4-hemostatic valve assembly; 41-a suction hemostasis valve; 411-valve body main pipe; 412-valve body side tube; 42-hemostatic valve cover; 420-thrombus pull out port; 421-squeeze tab; 43-an inner valve seal ring; 5-vasodilators; 51-a mandrel; 52-hemostatic valve cap.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters designate like items in the drawings, and thus once an item is defined in one drawing, no further definition or explanation thereof is necessary in the subsequent drawings.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "proximal", "distal", "front", "rear", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In particular, in the present invention, the end of the medical device close to the operator is the proximal end of the medical device during surgery, and the end of the medical device entering the blood vessel of the patient is the distal end of the medical device (the front end of the medical device is the distal end, and the rear end of the medical device is the proximal end).
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
A first aspect of the present embodiment provides a thrombus-aspiration assembly, referring to fig. 1 to 10, comprising an operation handle 1, an outer sheath 2 and an aspiration catheter 3; specifically, the operating handle 1 includes a handle housing 11 having an axial inner cavity and a driving member 12 movably mounted to the handle housing 11; the outer sheath tube 2 and the handle shell 11 are coaxially arranged in the handle shell 11, the distal end extends to the outside of the handle shell 11, and the proximal end is fixedly or in transmission connection with the driving piece 12; the suction catheter 3 passes through the outer sheath 2 and is fixedly connected to the handle housing 11 in an axial direction, and a braided outer flaring 30 is provided at the distal end of the suction catheter 3, and the outer flaring 30 self-expands in a released state to form a funnel shape with a distally cut opening gradually increasing in diameter from the proximal end to the distal end as shown in fig. 1 and 2. Wherein: the driver 12 is configured to be axially slidable with respect to the handle housing 11 to axially reciprocate with respect to the handle housing 11 with the outer sheath 2, thereby binding the outer flare 30 of the aspiration catheter 3 inside the outer sheath 2 or releasing it outside the outer sheath 2.
A second aspect of the present embodiment provides a thrombolytic expansion device, as shown in fig. 11 to 14, comprising a vasodilator 5 and a thrombus aspiration assembly as provided in the first aspect, the vasodilator 5 comprising a distal tipped mandrel 51; in the first state, the mandrel 51 passes through the axial lumen of the handle housing 11 and the suction catheter 3, and in the second state, the mandrel 51 is withdrawn from the operating handle 1.
The manner of using the thrombus aspiration assembly provided in the first aspect of the present embodiment will be described below in connection with the thrombolytic expansion device provided in the second aspect:
before use, the assembly is carried out in the first condition described above, i.e. as shown in fig. 11 to 14, the mandrel 51 of the vasodilator 5 is passed through the axial lumen of the handle housing 11 and the suction catheter 3 until the distal end of the mandrel 51 passes out of the outer flare 30 at the distal end of the suction catheter 3; in addition, the axial position of the driving piece 12 is adjusted relative to the handle shell 11, so that the outer flaring 30 of the suction catheter 3 is ensured to be bound inside the outer sheath 2, namely, the outer flaring 30 at the distal end of the suction catheter 3 is kept in a contracted state;
then, the distal end of the assembled thrombolysis and dilation device is sent into a blood vessel, and the distal tip part of the mandrel 51 is used as a guide head for quick introduction in the sending process;
after introduction in place, the vasodilator 5 is withdrawn rearwardly at the proximal end of the handle housing 11, and then the driver 12 is slid rearwardly relative to the handle housing 11 to slide axially rearwardly relative to the handle housing 11 with the outer sheath 2, thereby releasing the outer flare 30 of the aspiration catheter 3 from the outer sheath 2, the outer flare 30 self-expanding to form a funnel as shown in figures 1 and 2; at this time, thrombus is sucked by the suction port at the proximal end of the suction catheter 3, and thrombus in and around the outer flaring 30 can be sucked, so that thrombus can be quickly removed; in addition, the thrombus taking support can be additionally inserted into the suction catheter 3 to assist thrombus taking, and can be withdrawn from the proximal end of the handle shell 11 at any time;
after the whole thrombus taking action is completed, the axial position of the driving piece 12 is adjusted relative to the handle shell 11 again, so that the outer flaring 30 of the suction catheter 3 is ensured to be bound inside the outer sheath 2, namely, the outer flaring 30 at the distal end of the suction catheter 3 is kept in a contracted state, and then the thrombus taking expansion device is withdrawn from the patient after being integrated.
In this embodiment, because the operating handle 1 and the outer sheath 2 are provided, the driving piece 12 on the operating handle is used to control the outer sheath 2 to axially slide relative to the handle housing 11 so as to release or re-tie the outer flaring 30 at the distal end of the suction catheter 3 at any time according to needs, thereby reducing the operation difficulty of a patient, and after the whole thrombus taking action is completed, the outer flaring 30 can be contracted first and then the whole thrombus taking expansion device can be withdrawn, so that the inner wall of a blood vessel is prevented from being retracted and scraped in the expanded state of the outer flaring 30, the wound of a patient is prevented from being secondarily injured when the outer flaring 30 is taken out from a puncture, the physical burden of the patient is reduced, the complication risk in the thrombus taking operation process is reduced, and the postoperative recovery of the patient is facilitated.
With continued reference to fig. 1-10, in conjunction with fig. 11-14, to avoid blood leakage during surgery and to facilitate aspiration of thrombus, in an alternative implementation of this embodiment, it is preferable that the thrombus aspiration assembly further include a hemostatic valve assembly 4; specifically: the hemostatic valve assembly 4 comprises a suction hemostatic valve 41, an internal valve seal 43 and a hemostatic valve cover 42; the valve body of the suction hemostasis valve 41 includes a valve body main pipe 411 and a valve body side pipe 412 connected to one side of the valve body main pipe 411 and communicating with the inside of the valve body main pipe 411; the valve body main pipe 411 is fixedly arranged in the axial inner cavity of the handle shell 11, and the proximal end of the suction catheter 3 is connected with the distal end of the valve body main pipe 411 in a sealing way; the valve body side pipe 412 extends from an installation avoidance hole provided on the handle housing 11 to the outside of the handle housing 11; further, an enlarged diameter portion having a diameter that increases from the distal end toward the proximal end is provided on the proximal end inner peripheral surface of the valve body main pipe 411; the in-valve seal ring 43 is provided inside the proximal end of the valve body main pipe 411 and abuts against the proximal end side of the expanded diameter portion. The hemostatic valve cover 42 is in threaded sleeve connection with the handle shell 11 or the proximal end of the main valve body pipe 411 (the best mode is shown, the proximal end of the main valve body pipe 411 is arranged), the inner side surface of the hemostatic valve cover 42 is provided with a squeezing bulge 421, the hemostatic valve cover 42 is provided with a thrombus pulling outlet 420 which axially penetrates through the hemostatic valve cover 42 and the squeezing bulge 421, the thrombus pulling outlet 420 is communicated with the inner hole of the valve inner sealing ring 43 and the inner cavity of the main valve body pipe 411, and is used for withdrawing the mandrel 51 of the vasodilator 5 backwards or pulling out a matched thrombus taking support; the hemostatic valve cover 42 can be screwed or unscrewed to the proximal end of the handle case 11 or the valve main tube 411 (in the preferred embodiment shown, to the proximal end of the valve main tube 411) so as to press or release the valve seal ring 43 between the pressing projection 421 and the distal side inner wall of the expanded diameter portion, and in the screwed state, i.e., in the blood-stopping state, blood does not flow out from the gap between the inner cavity wall surface of the proximal end of the handle case 11 and the outer peripheral wall surface of the suction catheter 3.
To increase the ease of manipulation of the axial sliding movement of the driver 12 on the handle housing 11 relative to the handle housing 11, in an alternative implementation of this embodiment, with continued reference to fig. 1-10 and fig. 13 and 14, it is preferred that an axial chute 111 is provided in the handle housing 11 that extends radially through the housing wall of the handle housing 11, that the driver 12 comprises a driver tube 121 and driver wings 122 attached to the sides of the driver tube 121, and that there are preferably two symmetrically disposed driver wings 122 as shown in fig. 2, 5 and 14; the driving pipe fitting 121 is arranged in the axial inner cavity of the handle shell 11 and is sealed and sleeved outside the suction catheter 3 in a sliding manner, and the proximal end of the outer sheath 2 is connected with the distal end of the driving pipe fitting 121 in a sealing manner; the driving wing 122 passes through the axial chute 111 to the outside of the handle shell 11, so that the driving piece 12 is axially and slidably installed in the axial chute 111, so that the axial sliding action of the driving piece 12 is guided by the axial chute 111, meanwhile, the driving pipe fitting 121 is arranged in the axial inner cavity of the handle shell 11 and is sealed and slidably sleeved outside the suction catheter 3, and the proximal end of the outer sheath 2 is in sealing connection with the distal end of the driving pipe fitting 121, so that the hemostatic function can be further achieved, and the hemostatic effect is enhanced.
It is further preferred that a sliding aid is provided between the driving member 12 and the axial cavity wall surface of the handle housing 11, by which sliding aid the smoothness of the axial sliding of the driving member 12 relative to the handle housing 11 is further improved. In a preferred embodiment, referring to fig. 6 and 15, the sliding aid includes a ball 123, a protrusion protruding toward the outside of the driving tube 121 is provided on a side surface of the driving tube 121, a ball mounting groove is provided on a side of the protrusion facing the axial inner cavity wall surface of the handle housing 11, the ball 123 is limited in the ball mounting groove and can roll in all directions, and a partial spherical surface of the ball 123 protrudes out of the ball mounting groove and is in rolling contact with the axial inner cavity wall surface of the handle housing 11. The balls 123 capable of universal rolling change the sliding friction between the part of the contact between the driving member 12 and the handle housing 11 into rolling friction, so that the friction force between the driving member 12 and the handle housing 11 during axial sliding is reduced, and further, the sliding smoothness is improved, preferably, as shown in fig. 1 to 15, two protruding parts are symmetrically arranged, and the balls 123 are correspondingly arranged, so as to strengthen the action smoothness.
Still further preferably, an axial ball limiting chute 112 is provided on the wall surface of the axial cavity of the handle housing 11, and a portion of the ball 123 facing the wall surface of the axial cavity of the handle housing 11 is limited in the axial ball limiting chute 112 to avoid the sliding of the ball 123, and meanwhile, the axial ball limiting chute 112 is utilized for sliding guiding, so that the sliding directionality of the ball 123 is increased, and the axial sliding of the driving member 12 relative to the handle housing 11 is smoother.
Furthermore, if the two shafts 51 of the vasodilator 5 are separated from each other during the axial movement of the shafts relative to the suction catheter 3, the shafts 51 may shake relative to the suction catheter 3, as in the prior art published patent application No. 202211631642.2, publication No. CN115778486a, in which the operator is required to control both the suction catheter 3 and the vasodilator 5 simultaneously in order to avoid damage to the vessel wall of the patient during the process of entering the blood vessel by the distal end of the suction catheter 3 or the tip portion of the shaft 51, which may cause an obstacle to the operation, the applicant makes further improvements to the above-mentioned structure of the present application:
preferably, the driving member 12 further includes a seal ring 124 and a seal ring retainer 125; a boss protruding radially inward is provided on the inner peripheral surface of the driving pipe 121, and a seal ring 124 is provided between the inner peripheral surface of the driving pipe 121 and the outer peripheral surface of the suction duct 3 at one side of the boss. The seal ring holder 125 includes a tubular body having an axially first end with an end surface extending radially outwardly therefrom and bent toward an axially second end of the tubular body to form a groove. The tubular body is slidably sleeved outside the suction catheter 3, and the second end of the tubular body is inserted into the driving pipe 121 from one end of the driving pipe 121, so that the sealing ring 124 is extruded between the second end face and the boss side face of the tubular body, and the end, adjacent to the tubular body, of the driving pipe 121 is fastened in the fastening groove.
Furthermore, in some preferred implementations of the present embodiment, a suction channel 1220 is provided inside the driving wing 122 through the driving wing 122, the suction channel 1220 being in communication with the lumen of the driving tube 121 and thus with the lumen of the outer sheath 2.
In some preferred embodiments, as shown in fig. 2, 3 and 14, in both the side of the driving wing 122 facing the outer wall of the handle housing 11 and the portions on the outer peripheral wall of the handle housing 11 near the proximal end and the distal end of the axial chute 111 thereof, one sets the positioning groove 113, and the other sets the positioning protrusion 1221 to lock the driving wing 122 on the handle housing 11 in two states that the outer flare 30 of the suction catheter 3 is retracted into the outer sheath 2 in the proximal direction or released from the outer sheath 2 in the distal direction, respectively, so that the driving member 12 has a stroke limit locking function, and when a large force is applied, the locking fails.
Furthermore, in order to further increase the sliding smoothness, in the present embodiment, it is preferable that the suction duct 3 includes a stainless steel connecting tube section 31 and a suction tube section 32 as shown in fig. 9 and 10; the driving tube 121 is sealed and slidably sleeved outside the stainless steel connecting tube segment 31, the proximal end of the suction tube segment 32 is connected to the distal end of the stainless steel connecting tube segment 31 in a sealing manner, and the outer flaring 30 is disposed at the distal end of the suction tube segment 32.
In addition, in the thrombus-removing stent according to the second aspect of the present embodiment, as shown in fig. 11 to 14, preferably, the vessel dilator 5 further comprises a hemostatic bonnet 52 sleeved on the proximal end of the mandrel 51, the hemostatic bonnet 52 preferably comprises an annular rear cover and a columnar boss connected to the distal end face of the annular rear cover, and in the initial assembly state, the columnar boss is inserted into the thrombus-pulling out port 420 of the hemostatic valve cover 42 at the proximal end of the handle housing 11, and preferably, the outer circumferential surface of the columnar boss of the cover is formed as a conical surface with gradually decreasing outer diameter in the distal direction from the proximal end of the cap so as to be more smoothly inserted into and pulled out of the thrombus-pulling out port 420.
Finally, it should be noted that:
1. the thrombus suction assembly provided by the specification has the advantages of simple structure and easy operation and control, and has good clinical application significance;
2. in the present specification, "and/or" means "and/or" preceding structure is provided simultaneously or alternatively with "and/or" following structure;
2. in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are only required to be seen with each other; the above embodiments in the present specification are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A thrombus aspiration assembly for use with a vasodilator (5), characterized by: the thrombus aspiration assembly includes:
an operating handle (1) comprising a handle housing (11) having an axial inner cavity and a driving member (12) movably mounted to the handle housing (11);
the outer sheath tube (2) is coaxially arranged in the handle shell (11) with the handle shell (11), the distal end of the outer sheath tube extends to the outside of the handle shell (11), and the proximal end of the outer sheath tube is fixedly or in transmission connection with the driving piece (12);
the suction catheter (3) penetrates through the outer sheath tube (2) and is axially and fixedly connected to the handle shell (11), and a braided outer flaring (30) is arranged at the distal end of the suction catheter (3);
the driving piece (12) is configured to axially slide relative to the handle shell (11) so as to carry the outer sheath tube (2) to axially slide back and forth relative to the handle shell (11), so that the outer flaring (30) of the suction catheter (3) is bound inside the outer sheath tube (2) or released outside the outer sheath tube (2).
2. The thrombus aspiration assembly of claim 1, wherein: the thrombus aspiration assembly further comprises a hemostatic valve assembly (4);
the hemostatic valve assembly (4) comprises a suction hemostatic valve (41), an internal valve sealing ring (43) and a hemostatic valve cover (42);
the valve body of the suction hemostasis valve (41) comprises a valve body main pipe (411) and a valve body side pipe (412) which is connected to one side of the valve body main pipe (411) and is communicated with the interior of the valve body main pipe (411); the valve body main pipe (411) is fixedly arranged in the axial inner cavity of the handle shell (11), and the proximal end of the suction catheter (3) is connected with the distal end of the valve body main pipe (411) in a sealing way; the valve body side pipe (412) extends from an installation avoidance hole formed in the handle shell (11) to the outside of the handle shell (11); further, an enlarged diameter portion having a diameter that increases from the distal end toward the proximal end is provided on the proximal end inner peripheral surface of the valve body main tube (411); the valve inner sealing ring (43) is arranged in the proximal end of the valve main pipe (411) and is abutted against the proximal end side of the expanding part;
the hemostatic valve cover (42) is in threaded sleeve connection with the handle shell (11) or the proximal end of the main valve body pipe (411), an extrusion bulge (421) is arranged on the inner side surface of the hemostatic valve cover (42), a thrombus pulling outlet (420) axially penetrating through the hemostatic valve cover (42) and the extrusion bulge (421) is arranged on the hemostatic valve cover (42), the thrombus pulling outlet (420) is communicated with an inner hole of the valve inner sealing ring (43) and an inner cavity of the main valve body pipe (411), and the hemostatic valve cover (42) can be screwed or unscrewed on the handle shell (11) or the proximal end of the main valve body pipe (411) so as to extrude or release the valve inner sealing ring (43) between the extrusion bulge (421) and the distal side inner wall of the expanding part.
3. The thrombus aspiration assembly of claim 1, wherein: the handle shell (11) is provided with an axial sliding groove (111) which radially penetrates through the shell wall of the handle shell (11), the driving piece (12) comprises a driving pipe fitting (121) and a driving wing (122) connected to the side part of the driving pipe fitting (121), the driving pipe fitting (121) is arranged in an axial inner cavity of the handle shell (11) and is hermetically and slidingly sleeved outside the suction catheter (3), and the proximal end of the outer sheath tube (2) is hermetically connected to the distal end of the driving pipe fitting (121); the driving wings (122) penetrate out of the handle shell (11) from the axial sliding grooves (111) so that the driving piece (12) is axially and slidably arranged in the axial sliding grooves (111).
4. A thrombus aspiration assembly as in claim 3 wherein: a sliding aid is arranged between the driving piece (12) and the axial inner cavity wall surface of the handle shell (11).
5. The thrombus aspiration assembly of claim 4, wherein: the sliding assisting piece comprises balls (123), protruding portions protruding outwards of the driving pipe fitting (121) are arranged on the side face of the driving pipe fitting (121), ball mounting grooves are formed in the protruding portions towards one side of the wall face of the axial inner cavity of the handle shell (11), the balls are limited in the ball mounting grooves, and partial spherical surfaces of the balls (123) protrude out of the ball mounting grooves and are in rolling contact with the wall face of the axial inner cavity of the handle shell (11).
6. The thrombus aspiration assembly of claim 5, wherein: an axial ball limiting chute (112) is formed in the wall surface of the axial inner cavity of the handle shell (11), and the part, facing the wall surface of the axial inner cavity of the handle shell (11), of the ball (123) is limited in the axial ball limiting chute (112).
7. A thrombus aspiration assembly as in claim 3 wherein: the driving member (12) further comprises a sealing ring (124) and a sealing ring retainer (125);
a boss protruding radially inwards is arranged on the inner peripheral surface of the driving pipe fitting (121), and the sealing ring (124) is arranged between the inner peripheral surface of the driving pipe fitting (121) and the outer peripheral surface of the suction duct (3) and positioned at one side of the boss;
the seal ring retainer (125) comprises a tubular main body, wherein an end face of a first end of the tubular main body in the axial direction extends outwards in the radial direction and then is bent towards a second end of the tubular main body in the axial direction so as to form a buckling groove;
the tubular main body is sleeved outside the suction catheter (3) in a sliding manner, the second end of the tubular main body is inserted into the driving pipe fitting (121) from one end of the driving pipe fitting (121), the sealing ring (124) is extruded between the second end face of the tubular main body and the side face of the boss, and one end, adjacent to the tubular main body, of the driving pipe fitting (121) is buckled in the buckling groove.
8. A thrombus aspiration assembly as in claim 3 wherein:
a suction channel (1220) penetrating through the driving wing (122) is arranged inside the driving wing (122), and the suction channel (1220) is communicated with the inner cavity of the driving pipe fitting (121) and then is communicated with the inner cavity of the outer sheath tube (2);
and/or, in the one face of the driving wing (122) facing the outer wall of the handle housing (11) and the part of the outer peripheral wall of the handle housing (11) near the proximal end and the distal end of the axial chute (111), one sets a position clamping groove (113), and the other sets a position protrusion (1221) to clamp the driving wing (122) on the handle housing (11) under the two states that the outer flaring (30) of the suction catheter (3) is retracted into the outer sheath (2) in the proximal direction or released on the outer sheath (2) in the distal direction respectively.
9. A thrombus aspiration assembly as in claim 3 wherein: the suction duct (3) comprises a stainless steel connecting pipe section (31) and a suction pipe section (32); the driving pipe fitting (121) is sealed and sleeved outside the stainless steel connecting pipe section (31) in a sliding mode, the proximal end of the suction pipe section (32) is connected to the distal end of the stainless steel connecting pipe section (31) in a sealing mode, and the outer flaring (30) is arranged at the distal end of the suction pipe section (32).
10. A thrombus dilation device, characterized in that: comprising a vasodilator (5) and a thrombus aspiration assembly according to any one of claims 1 to 9;
the vasodilator (5) comprises a mandrel (51) with a tip at the distal end; in a first state, the mandrel (51) passes through the axial inner cavity of the handle housing (11) and the suction catheter (3), and in a second state, the mandrel (51) is withdrawn from the operating handle (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310457819.XA CN116158806B (en) | 2023-04-26 | 2023-04-26 | Thrombus aspiration component and thrombus taking expansion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310457819.XA CN116158806B (en) | 2023-04-26 | 2023-04-26 | Thrombus aspiration component and thrombus taking expansion device |
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| Publication Number | Publication Date |
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| CN116158806A true CN116158806A (en) | 2023-05-26 |
| CN116158806B CN116158806B (en) | 2023-07-04 |
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|---|---|---|---|
| CN202310457819.XA Active CN116158806B (en) | 2023-04-26 | 2023-04-26 | Thrombus aspiration component and thrombus taking expansion device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117357207A (en) * | 2023-12-05 | 2024-01-09 | 启晨(上海)医疗器械有限公司 | Conveying system for deep vein thrombosis removing device under trunk |
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| JP2013252296A (en) * | 2012-06-07 | 2013-12-19 | Nakazawa Kinzoku Seisakusho:Kk | Pressurizing pump for sphygmomanometer |
| CN108143464A (en) * | 2018-01-19 | 2018-06-12 | 上海唯域医疗科技有限公司 | It takes bolt conduit and takes bolt device for take bolt conduit |
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| CN115778486A (en) * | 2022-12-19 | 2023-03-14 | 北京管桥医疗科技有限公司 | Deep vein thrombus taking device |
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| CN202682555U (en) * | 2012-05-03 | 2013-01-23 | 深圳市昕力医疗设备开发有限公司 | Spring knob type Y-shaped hemostasis valve |
| JP2013252296A (en) * | 2012-06-07 | 2013-12-19 | Nakazawa Kinzoku Seisakusho:Kk | Pressurizing pump for sphygmomanometer |
| CN108143464A (en) * | 2018-01-19 | 2018-06-12 | 上海唯域医疗科技有限公司 | It takes bolt conduit and takes bolt device for take bolt conduit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117357207A (en) * | 2023-12-05 | 2024-01-09 | 启晨(上海)医疗器械有限公司 | Conveying system for deep vein thrombosis removing device under trunk |
| CN117357207B (en) * | 2023-12-05 | 2024-04-16 | 启晨(上海)医疗器械有限公司 | Conveying system for deep vein thrombosis removing device under trunk |
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| Publication number | Publication date |
|---|---|
| CN116158806B (en) | 2023-07-04 |
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