CN117298418A

CN117298418A - Intervention type fixing device

Info

Publication number: CN117298418A
Application number: CN202311443544.0A
Authority: CN
Inventors: 宋之言; 王钰富; 扈聪; 王冲
Original assignee: Suzhou Quantong Medical Technology Co ltd
Current assignee: Suzhou Quantong Medical Technology Co ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2023-12-29

Abstract

The invention provides an interventional type fixing device, which comprises a fixing piece and a channel, wherein the channel is connected with the proximal end of the fixing piece, the interventional type fixing device is used for extending into a tubular object, and the channel is used for enabling a medical instrument to extend into a target position from the inside or the outside of the channel along the axial direction of the channel; the fixing member can be abutted against the inner wall of the tube, can be restrained by the inner wall of the tube to be temporarily fixed when the fixing member is abutted against the inner wall of the tube, and is used for limiting the displacement of the passage in the radial direction of the tube. The invention can prevent the medical instrument from colliding with the inner wall of the blood vessel as much as possible after the medical instrument is inserted into the blood vessel, and ensures the use safety.

Description

Intervention type fixing device

Technical Field

The invention relates to the field of medical instruments, in particular to an interventional fixing device.

Background

In the conventional vascular surgery, a clinician selects an appropriate therapeutic apparatus according to the actual situation of a lesion area, and sends the therapeutic apparatus to a plurality of important human body parts and organs through a vascular channel of a human body according to needs through guidance of medical imaging equipment, such as: heart, brain, lung, kidney, etc., thereby performing diagnosis and treatment. However, the condition of the blood vessel of the human body is complicated, and the condition of the blood vessel of each person is different. For patients with lesion areas in distal blood vessels, clinicians need to steadily and slowly fumbly deliver therapeutic instruments to the lesion areas along the blood vessels, the operation time is too long, the patients and doctors are exposed to radiation for a long time, the operation cannot be completed quickly and effectively, and the probability of adverse events exists. Access type medical devices such as guidewires, catheter type products inevitably require contact with, and even pinching of, the vessel wall when establishing access. Improper contact can cause possible complications such as vasospasm, breakage, perforation, etc. For patients with poor vascular conditions, the target blood vessel or the pathway blood vessel is tortuous or tiny, the therapeutic apparatus is difficult to enter or pass through, and the therapeutic apparatus is easy to rub or collide with the blood vessel during the advancing process, so that the blood vessel of the patient is damaged.

Therefore, a new intravascular interventional therapeutic device is needed, and a passageway close to the axis of the central shaft of the blood vessel is established based on a new structural design, so that the therapeutic device used in the intravascular therapeutic operation can travel along the direction of the central shaft of the blood vessel, the friction between the device and the wall of the blood vessel is reduced, the possibility of damaging the blood vessel is reduced, and the therapeutic efficiency is improved.

Disclosure of Invention

The invention aims to provide an intervention type fixing device which can prevent a medical instrument from colliding with the inner wall of a blood vessel as much as possible after the medical instrument is inserted into the blood vessel, so that the use safety is ensured.

In order to solve the technical problems, the invention provides an interventional type fixing device, which comprises a fixing piece and a channel, wherein the channel is connected with the proximal end of the fixing piece, the interventional type fixing device is used for extending into a tubular object, and the channel is used for enabling a medical instrument to extend into a target position from the inside or the outside of the channel along the axial direction of the channel;

the fixing member can be abutted against the inner wall of the tube, can be restrained by the inner wall of the tube to be temporarily fixed when the fixing member is abutted against the inner wall of the tube, and is used for limiting the displacement of the passage in the radial direction of the tube.

Optionally, the fixing element comprises a fixing element body and a restraint element, the channel is connected with the proximal end of the restraint element, and the distal end of the restraint element is connected with a connecting point on the fixing element body; the fixing member body can be abutted against the inner wall of the tubular body, can be restrained by the inner wall of the tubular body to be temporarily fixed when the fixing member body is abutted against the inner wall of the tubular body, and the restraining member is used for limiting the displacement of the passage in the radial direction of the tubular body.

Optionally, the connecting point has a plurality of, and a plurality of the connecting point is followed the circumference of mounting body evenly sets up.

Optionally, the restraint includes a ring member disposed around the mount body.

Optionally, the distal end of the channel is connected to the proximal end of the constraint.

Optionally, the number of the connection points is plural, a plurality of first connection lines can be formed between the end point of the distal end of the channel and the plurality of connection points, and an angle range of an included angle between any two first connection lines is between 15 degrees and 110 degrees.

Optionally, the proximal end of the restraint is sleeved outside the channel, and the channel passes through the fastener body.

Optionally, the plurality of connection points are provided, a plurality of second connection lines can be formed between the end point of the proximal end of the fixing piece body and the plurality of connection points, and an included angle between any two second connection lines ranges from 15 degrees to 170 degrees.

Optionally, the volume of the fastener body can vary, and the connection point can contact the inner wall of the tube when the fastener body becomes so bulky in the tube as to rest against the inner wall of the tube.

Optionally, the fixing member is disposed coaxially with the channel.

The intervention type fixing device provided by the invention has the following beneficial effects:

the invention provides an interventional type fixing device, which comprises a fixing piece and a channel, wherein the channel is connected with the proximal end of the fixing piece, the interventional type fixing device is used for extending into a tubular object, and the channel is used for enabling a medical instrument to extend into a target position from the inside or the outside of the channel along the axial direction of the channel; the fixing member can be abutted against the inner wall of the tube, can be restrained by the inner wall of the tube to be temporarily fixed when the fixing member is abutted against the inner wall of the tube, and is used for limiting the displacement of the passage in the radial direction of the tube.

When the invention is used, the interventional type fixing device is firstly stretched into a target tubular object (such as a blood vessel), the fixing piece is abutted against the inner wall of the tubular object to form constraint, and then the interventional type medical instrument is stretched out of the channel.

Drawings

FIG. 1 is a side view of an interventional type fixing device according to an embodiment of the present invention;

FIG. 2 is a side view of an interventional type fixing device according to an embodiment of the present invention in a delivery state in a blood vessel;

FIG. 3 is a side view of an interventional type fixing device according to an embodiment of the present invention in a fixed state in a blood vessel;

FIG. 4 is a side view of an interventional type fixing device according to a second embodiment of the present invention;

FIG. 5 is a side view of an interventional type fixing device according to a third embodiment of the present invention;

FIG. 6 is a side view of an interventional type fixing device according to a fourth embodiment of the present invention;

the reference numerals are as follows:

1-a fixing piece body; 2-a restraint; 3-channel; 4-blood vessel.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.

It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on, connected to, or comprise the intervening element or layer. In contrast, when an element is referred to as being "directly on" …, "directly connected to" another element or layer, there are no intervening elements or layers involved. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention. Spatially relative terms, such as "under … …," "below," "lower," "above … …," "upper," and the like, may be used herein for convenience of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" … … "," below "and" beneath "would then be oriented" on "other elements or features. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups. As used herein, the term "and/or" includes any and all combinations of the associated listed items.

The definition of "proximal" and "distal" herein is: "proximal" generally refers to the proximal end of the medical device that is adjacent to the operator during normal operation, and "distal" generally refers to the proximal end of the medical device that first enters the patient during normal operation.

Specifically, referring to fig. 1, fig. 1 is a side view of an interventional fixing device according to an embodiment of the invention. As shown in fig. 1, the fixing member comprises a fixing member body 1 and a restraining member 2, the passage 3 is connected to a proximal end of the restraining member 2, a distal end of the restraining member 2 is connected to a connection point on the fixing member body 1, and the restraining member 2 is used for restricting displacement of the passage 3 in a radial direction of the tubular member. The interventional fixing device is used for extending into a tubular object, and the channel 3 is used for passing medical equipment; the fixing member body 1 can be abutted against the inner wall of the tube, and can be restrained by the inner wall of the tube to be temporarily fixed when the fixing member body 1 is abutted against the inner wall of the tube, and the restraining member 2 is used for restricting the displacement of the passage 3 in the radial direction of the tube. The channel 3 can be formed by weaving a hollow pipe body, a solid wire material and a plurality of strands of wires. The surface of the channel 3 can be polished, coated, grafted or precipitated to obtain a smooth contact surface.

When the invention is used, the interventional fixing device is firstly extended into a target tubular object (such as a blood vessel), the fixing part body 1 is abutted against the inner wall of the tubular object to form constraint, and then the interventional medical device is extended out of the channel, and the proximal end of the constraining part 2 can be constrained not to exceed the fixing part body 1 along the radial direction of the tubular object, so that the interventional medical device can be positioned in the middle of the tubular object as far as possible after being extended out of the channel 3, thereby avoiding the medical device from colliding with the inner wall of the tubular object as far as possible after the medical device is inserted into the tubular object such as the blood vessel, and ensuring the use safety.

As a preferred embodiment, the holder body 1 is arranged coaxially with the channel 3. The arrangement can restrict the outlet end of the channel 3 to be near the axis of the tubular object as much as possible, thereby establishing a passage at the axis position of the blood vessel central axis when carrying out the intravascular operation, leading the instruments used in the intravascular operation to travel along the blood vessel central axis position, reducing the contact between the instruments and the blood vessel, reducing the possibility of damaging the blood vessel wall, facilitating the operation of clinicians, improving the treatment efficiency and reducing the probability of adverse events.

Further, the number of the connection points is plural, and the plural connection points are uniformly arranged along the circumferential direction of the fixing member body 1. This arrangement makes it possible to apply a restraining force to the passage 3 from a plurality of directions, further restraining the portion of the passage 3 near the outlet end from being as close to the inner wall of the tubular as possible.

Preferably, the volume of the holder body 1 can vary. Referring to fig. 2 and 3, fig. 2 is a side view illustrating an interventional fixing device in a delivery state in a blood vessel according to an embodiment of the present invention; fig. 3 is a side view showing an interventional type fixing device according to an embodiment of the present invention in a fixed state in a blood vessel. As shown in fig. 2 and 3, when the volume of the anchor body 1 becomes small, it will be able to freely move in the axial direction in the blood vessel 4, so that it can be smoothly delivered to a target position; when the volume of the fixing part body 1 becomes large, the fixing part body can be abutted against the inner wall of the blood vessel 4 to form constraint, so that the fixing function is realized. It will be appreciated that the restraint 2 should be able to move correspondingly as the volume of the mount body 1 changes.

Further, when the volume of the fastener body 1 in the tube becomes so large as to abut against the inner wall of the tube, the connection point can be brought into contact with the inner wall of the tube. By the arrangement, the restraining effect of the restraining piece 2 is guaranteed, and the restraining piece 2 can be prevented from colliding with the inner wall of the tubular object.

It should be noted that the connection between the channel 3 and the fixing body 1 may be two, and the first is that the distal end of the channel 3 is connected to the proximal end of the constraint member 2. At this time, the channel 3 is not directly connected to the fixing member body 1, and at this time, the distal end point of the channel 3 is located at point a in fig. 1, so, in order to achieve a good constraint effect, the present invention correspondingly provides the following technical solutions: the number of the connecting points is plural, a plurality of first connecting lines can be formed between the end point of the far end of the channel 3 and the plurality of connecting points, and the included angle between any two first connecting lines ranges from 15 degrees to 110 degrees. It can be understood from fig. 1 that the included angle a between the connection AC and the connection AC' is between 15 degrees and 110 degrees.

The second connection mode between the channel 3 and the fixing member body 1 is that the proximal end of the constraint member 2 is sleeved and connected to the outside of the channel 3, at this time, the channel 3 passes through the fixing member body 1, at this time, the end point of the proximal end of the fixing member body 1 is located at the point B in fig. 1, in this case, in order to achieve a good constraint effect, the following technical scheme is correspondingly provided: the connecting points are multiple, a plurality of second connecting lines can be formed between the end point of the proximal end of the fixing piece body 1 and the connecting points, and the included angle between any two second connecting lines is 15-170 degrees. In fig. 1 it can be understood that the angle β between the connection BC and the connection BC' is between 15 and 170 degrees.

The fixing member body 1 may be a balloon or a deformable support member (e.g., a collapsible support frame), and the material of the fixing member body 1 may be a metal or polymer material with a shape memory function or a balloon material with an expansion function. The fixing piece body 1 can be formed by weaving, laser cutting, additive manufacturing or injection molding. But is not limited thereto. The shape of the restraint 2 is not limited, please refer to fig. 4 to 5, fig. 4 is a side view of an interventional fixing device according to a second embodiment of the present invention; fig. 5 is a side view of an interventional type fixing device according to a third embodiment of the present invention. As shown in fig. 4 and 5, the cross section of the constraint 2 may be formed into an approximate cone shape, which is not a strict geometrical standard cone, and the sides may be stepped as in fig. 4, filiform, curved or irregular as in fig. 5. The restraint 2 may also include a ring member disposed around the mount. Referring to fig. 6, fig. 6 is a side view of an interventional type fixing device according to a fourth embodiment of the present invention. As shown in fig. 6, the restraining member 2 may also be annular, and the restraining member 2 may also include both the annular member and the filament-like structure, so as to further enhance the restraining capability.

The fasteners may also include components including visualization or visualization features that assist the physician in accurately delivering the fasteners to the desired location under the visualization device. At least 2 developing units may be included to respectively identify the distal and proximal end position information of the fixture. The developing member may be selected from platinum iridium alloy, platinum tungsten alloy or platinum rhodium alloy. The fixing device and the channel can be connected by hot melt compression, welding, winding and the like.

The following describes the technical scheme of the present invention with reference to specific examples:

example 1

The distal end of the channel 3 is connected with a self-expanding stent (and the fixing piece) through a bifurcation connecting point, the bifurcation connecting point is positioned on the channel 3, and the axial virtual ray of the channel 3 passes through the center position of the self-expanding stent; the self-expansion bracket is required to be a circumferentially closed whole; the self-expanding stent is configured to elastically deform and radially self-compliance collapse when subjected to a radially inward force.

When the self-expanding stent reaches a focus through the micro-catheter, the self-expanding stent is pushed out of the catheter and gradually expands after not receiving radial acting force from the catheter, and when the self-expanding stent expands to be in contact with the wall of a blood vessel, the self-expanding stent receives radial acting force from the wall of the blood vessel, and is clung to the inner wall of the blood vessel, so that the self-expanding stent plays a role of establishing a channel 3 positioned at the axial center of the blood vessel.

Example 2

The fastener body 1 includes: a balloon. The proximal end of the pretreatment balloon is fixedly connected with a channel, and the channel 3 passes through the balloon.

The interventional fixing device is delivered to a lesion in a contracted state of the balloon, and the balloon is inflated to expand the balloon to be in contact with the inner wall of the blood vessel and slightly press the blood vessel, so that the interventional fixing device plays a role of establishing a channel 3 positioned at the middle position of the blood vessel.

It should be further noted that although the present invention has been disclosed in the preferred embodiments, the above embodiments are not intended to limit the present invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

It should be further understood that the terms "first," "second," "third," and the like in this specification are used merely for distinguishing between various components, elements, steps, etc. in the specification and not for indicating a logical or sequential relationship between the various components, elements, steps, etc., unless otherwise indicated.

It should also be understood that the terminology described herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. It must be noted that, as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. For example, reference to "a step" or "an apparatus" means a reference to one or more steps or apparatuses, and may include sub-steps as well as sub-apparatuses. All conjunctions used should be understood in the broadest sense. And, the word "or" should be understood as having the definition of a logical "or" rather than a logical "exclusive or" unless the context clearly indicates the contrary. Further, implementation of embodiments of the present invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. An interventional fastening device comprising a fastening element and a channel, said channel being connected to a proximal end of said fastening element, said interventional fastening device being adapted to extend into a tubular object, said channel being adapted to allow a medical instrument to extend axially along said channel from inside or outside said channel to a target location;

2. The interventional fastening device of claim 1, wherein the fastening element comprises a fastening element body and a constraining element, the channel being connected to a proximal end of the constraining element, a distal end of the constraining element being connected to a connection point on the fastening element body;

the fixing member body can be abutted against the inner wall of the tubular body, can be restrained by the inner wall of the tubular body to be temporarily fixed when the fixing member body is abutted against the inner wall of the tubular body, and the restraining member is used for limiting the displacement of the passage in the radial direction of the tubular body.

3. The interventional fastening device of claim 2, wherein a plurality of said attachment points are provided, said plurality of attachment points being disposed uniformly along a circumference of said fastening body.

4. The interventional fastening device of claim 2, wherein the constraint comprises a ring member disposed around the fastening body.

5. The interventional fastening device of claim 2, wherein the distal end of the channel is connected to the proximal end of the constraint.

6. The interventional fastening device of claim 5, wherein the plurality of connection points are provided, wherein a plurality of first lines can be formed between the distal end of the channel and the plurality of connection points, and wherein the included angle between any two of the first lines is in the range of 15 degrees to 110 degrees.

7. The interventional fastening device of claim 2, wherein the proximal end of the restraint is sleeved outside of the channel, the channel passing through the fastener body.

8. The invasive fixation apparatus according to claim 7, wherein there are a plurality of connection points, and a plurality of second connection lines can be formed between the end point of the proximal end of the fixing body and the plurality of connection points, and an angle between any two of the second connection lines ranges from 15 degrees to 170 degrees.

9. The interventional fastening device of claim 2, wherein the fastening element body is variable in volume and the connection point is contactable with the inner wall of the tube when the fastening element body becomes so voluminous in the tube as to abut the inner wall of the tube.

10. The interventional fastening device of claim 1, wherein the fastening element is disposed coaxially with the passageway.