Medical guiding and positioning device

Abstract

The present invention relates to the technical field of medical instruments. Disclosed is a medical guiding and positioning device, comprising: a guiding and positioning mechanism (100), which comprises an elastic positioning portion (110) and an extension portion (120), wherein the elastic positioning portion (110) is a hollow mesh body, and a front end portion thereof is an arc surface protruding in a direction away from the extension portion (120); the part where the elastic positioning portion (110) is connected to the extension portion (120) is a connection point (111); the elastic positioning portion (110) has an initial state and a deformed state; the extension portion (120) has a first end (121) and a second end (122) opposite to each other, the end close to the elastic positioning portion being the first end (121); and a wire of several lengths is provided between the first end (121) and the second end (122). The problem in the prior art of a medical guiding and positioning device being inconvenient for carrying out positioning, having a low protection performance, and having poor overall levels of practicability is solved.

Description

Medical guiding and positioning device Technical Field

[0001] The utility model relates to the technical field of medical equipment, and in particular to a medical guiding and positioning device. Background Art

[0002] Currently, some surgeries require inserting a long medical device, such as a catheter, through the lower limbs, arms, wrists, or other parts of the body. A guide wire is then inserted into the catheter and delivered to the affected area for treatment.

[0003] However, traditional guidewires are difficult to position, have low protection performance, and are prone to damaging the patient's internal tissues. Their overall practicality is low and they cannot meet the needs of the industry. For example, in the invention patent with patent number CN202080022376.6, filed on March 10, 2020, and titled "Guidewire," different patterns are provided on the guidewire to improve visual recognition, thereby facilitating precise control of the guidewire position during surgery. However, the guidewire's protective properties are not improved, and its front end is prone to causing damage to the human body's internal tissues, increasing the risk of surgery.

[0004] Utility Model Content

[0005] The purpose of the utility model is to provide a medical guiding and positioning device to solve the problems of inconvenient positioning, low protection performance and poor overall practicality in the prior art.

[0006] To solve the above problems, the utility model first provides a medical guide positioning device, including: a guide positioning mechanism, the guide positioning mechanism includes an elastic positioning part and an extension part; the elastic positioning part is a hollow mesh body, the front end part of which is an arc surface convex in the direction away from the extension part, the connection between the elastic positioning part and the extension part is a connection point, and the elastic positioning part has an initial state and a deformation state; the extension part has a first end and a second end relative to each other, the first end is close to the elastic positioning part, and a lead wire of several lengths is between the first end and the second end; when in the initial state, the point on the elastic positioning part farthest from the connection point is the distal end point, and the connection point and the distal end point are both located on the axis of the elastic positioning part, the first end or a point between the first end and the second end is the connection point, and the distance between the first end and the connection point is less than the distance between the distal end point and the connection point; when in the deformation state, the elasticity of the elastic positioning part is configured to support the first end to move to any point on the outer surface of the elastic positioning part.

[0007] In this way, a deformable elastic positioning part is provided at the front end of the guide positioning mechanism, the extension part is connected to the elastic deformation part, and its elastic support first end is moved to any point on the outer surface of the elastic deformation part, so that the elastic positioning part can change at will during the transmission process, thereby accelerating the transmission efficiency, and the front end part of the elastic positioning part is set to an arc surface convex in the direction away from the extension part, which enhances the protection performance, so that the elastic positioning part has a larger force area when reaching the inside of the human tissue, avoiding damage; in addition, the first end or a point between the first end and the second end is used as a connection point, and the distance between the first end and the connection point is less than the distance between the distal end and the connection point, so that the first end is a connection point or is located in the hollow interior of the elastic positioning part, which is convenient for forming different deformation shapes, suitable for operations in different situations, and enhances the applicability of this device; in addition, the meshed hollow structure is convenient for transmitting ultrasonic signals, can enhance the positioning function, and optimize the visibility of the guide positioning mechanism during transmission. This device is improved from multiple aspects, which improves the practicality of the medical guide positioning device as a whole.

[0008] Furthermore, in the initial state, the elastic positioning portion includes an outer surface and an inner surface that are smoothly connected and spaced apart. Both the outer surface and the inner surface are arc surfaces convex away from the extension portion, and the surface area of ​​the inner surface is smaller than the surface area of ​​the outer surface.

[0009] Furthermore, when in the initial state, the elastic positioning portion includes an outer convex portion and a bent edge portion that are connected to each other, the outer convex portion includes an outer arc surface and an inner arc surface that are spaced apart, the surface area of ​​the inner arc surface is smaller than the surface area of ​​the outer arc surface, the outer arc surface and the inner arc surface both protrude in a direction away from the extension portion, the bent edge portion is bent in a direction perpendicular to the length of the extension portion, the bent edge portion includes a first curved surface and a second curved surface that are smoothly connected and spaced apart, the first curved surface is connected to the end portion of the inner curved surface, and the second curved surface is connected to the end portion of the outer curved surface.

[0010] Furthermore, when in the initial state, the elastic positioning portion includes a first mesh body and a second mesh body connected to each other, the volume of the second mesh body is smaller than that of the first mesh body and is located in the inner cavity of the first mesh body, the first mesh body and the second mesh body both have an outer arc surface and an inner arc surface that are spaced apart and smoothly connected, the surface area of ​​the inner arc surface is smaller than the surface area of ​​the outer arc surface, and both the outer arc surface and the inner arc surface protrude in a direction away from the extension portion.

[0011] Furthermore, in the initial state, the elastic positioning portion includes at least two spheres with different diameters, and the centers of the multiple spheres and the connection points are located on the same straight line.

[0012] Furthermore, in the initial state, the elastic positioning portion has a shape of a sphere, an ellipsoid or an egg.

[0013] Furthermore, in the initial state, the elastic positioning portion includes a first arcuate surface at the front end portion and a second arcuate surface connected to the extension portion, the first arcuate surface and the second arcuate surface are connected by a third arcuate surface, and the convex direction of the second arcuate surface is opposite to the convex direction of the first arcuate surface.

[0014] Furthermore, it also includes a catheter and a loading mechanism. The loading mechanism is a hollow tube with a connecting end and a loading end relative to each other. The connecting end is connected to the end of the catheter, and the guiding and positioning mechanism enters the loading mechanism from the loading end.

[0015] Furthermore, a gap is provided on the side wall between the connecting end and the loading end, and the gap is configured to support the extension portion to pass through.

[0016] Furthermore, the loading mechanism includes a smooth section and an outward expansion section connected in sequence from front to back, the tube diameter of the smooth section is consistent, and the tube diameter of the outward expansion section gradually increases from front to back. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] FIG1 is a schematic structural diagram of a medical guiding and positioning device provided by an embodiment of the present utility model;

[0019] FIG2 is a schematic structural diagram of the initial state of the guide and positioning mechanism provided by an embodiment of the present invention (I);

[0020] FIG3 is a schematic diagram of the initial state structure of the guide and positioning mechanism provided by an embodiment of the present invention (II);

[0021] FIG4 is a schematic structural diagram of the initial state of the guide and positioning mechanism provided by an embodiment of the present utility model (III);

[0022] FIG5 is a schematic structural diagram of the initial state of the guide and positioning mechanism provided by an embodiment of the present utility model (four);

[0023] FIG6 is a schematic structural diagram of the initial state of the guide and positioning mechanism provided by an embodiment of the present utility model (V);

[0024] FIG7 is a schematic structural diagram of the initial state of the guide and positioning mechanism provided by an embodiment of the present utility model (VI);

[0025] FIG8 is a schematic structural diagram of a deformation state of a guide and positioning mechanism provided by an embodiment of the present invention;

[0026] FIG9 is a schematic structural diagram of the initial state of the guide and positioning mechanism provided by an embodiment of the present utility model (VII);

[0027] FIG10 is a schematic structural diagram of the initial state of the guide and positioning mechanism provided in an embodiment of the present utility model (VIII).

[0028] Description of reference numerals:

[0029] 100 - guide and positioning mechanism; 110 - elastic positioning portion; 111 - connection point; 112 - distal end point; 113 - outer convex portion; 1131 - outer arc surface; 1132 - inner arc surface; 114 - curved edge portion; 1141 - first curved surface; 1142 - second curved surface; 115 - first curved surface; 116 - second curved surface; 117 - third curved surface; 120 - extension portion; 121 - first end; 122 - second end;

[0030] 200-catheter;

[0031] 300-loading mechanism; 301-connecting end; 302-loading end; 303-notch; 310-smooth section; 320-outward expansion section. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the following describes in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Example 1

[0034] Since existing medical guiding and positioning devices have problems such as inconvenient positioning, low protection performance and poor overall practicality, in order to solve the above problems, this embodiment first provides a medical guiding and positioning device, as shown in Figure 1, including a guiding and positioning mechanism 100, a catheter 200 and a loading mechanism 300, wherein the loading mechanism 300 is a hollow tube with a relative connecting end 301 and a loading end 302, the connecting end 301 is connected to the end of the catheter 200, and the guiding and positioning mechanism 100 enters the loading mechanism 300 from the loading end 302.

[0035] Specifically, the guide positioning mechanism 100 includes an elastic positioning portion 110 and an extension portion 120; the elastic positioning portion 110 is a hollow mesh body, the front end of which is an arc surface convex in the direction away from the extension portion 120, the connection point between the elastic positioning portion 110 and the extension portion 120 is a connection point 111, and the elastic positioning portion 110 has an initial state and a deformed state; the extension portion 120 has a first end 121 and a second end 122 opposite to each other, the first end 121 is close to the elastic positioning portion 110, and a lead wire of several lengths is between the first end 121 and the second end 122; when in the initial state, the guide positioning mechanism 100 is a hollow mesh body, the front end of which is an arc surface convex in the direction away from the extension portion 120, the connection point 111 between the elastic positioning portion 110 and the extension portion 120 is a connection point 111, and the elastic positioning portion 110 has an initial state and a deformed state; the extension portion 120 has a first end 121 and a second end 122 opposite to each other, the first end 121 is close to the elastic positioning portion 110, and a lead wire of several lengths is between the first end 121 and the second end 122; when in the initial state, the guide positioning mechanism 100 is a hollow mesh body, the front end of the elastic positioning portion 110 is a curved surface convex in the direction away from the extension portion 120, the connection point 111 In the initial state, the point on the elastic positioning portion 110 that is farthest from the connection point 111 is the distal end 112, and both the connection point 111 and the distal end 112 are located on the axis of the elastic positioning portion 110. The first end 121 or a point between the first end 121 and the second end 122 is the connection point 111, and the distance between the first end 121 and the connection point 111 is less than the distance between the distal end 112 and the connection point 111. When in the deformed state, the elasticity of the elastic positioning portion 110 is configured to support the movement of the first end 121 to any point on the outer surface of the elastic positioning portion 110. In this embodiment, various shapes of the elastic positioning portion 110 are listed in Figures 2 to 10, which are described in detail in the following embodiments. The properties of the elastic positioning portion 110 of the present invention include but are not limited to the shapes in Figures 2 to 10.

[0036] This device can be used in transcatheter aortic valve replacement. The other devices mentioned below are all conventional devices in this field, which can be fully understood by those skilled in the art and will not be elaborated again. The following explanation is mainly to reflect the reference scenarios and effects of this device. At present, in this type of surgery, after the stent valve reaches the aortic valve ring, the outer sheath of the delivery system can be slowly withdrawn by controlling the knob of the delivery system. The stent valve compressed between the inner and outer sheaths gradually opens due to its elasticity, returns to its natural state and is fixed in the aortic valve ring. However, due to the huge tension in the delivery system during this process, and the stent valve will still slide forward during the opening process, the stent valve is easy to deviate from its original position, causing the operation to fail. The device in this embodiment can assist in positioning the stent-valve. The elastic positioning portion 110 of the device is inserted into the left ventricle through the aortic valve. After the valve delivery system is inserted into the human body along the device and reaches the left ventricle, conventional positioning is performed so that the stent-valve base is located at the aortic valve annulus. When the outer sheath begins to be withdrawn, the distal end 112 and the adjacent portion of the elastic positioning portion 110 of the device will be placed under the aortic valve annulus. The stent-valve will fall into the elastic positioning portion 110 during the gradual release process. The curved surface of the mesh body will support and protect it. At this time, the delivery system head will naturally enter the groove of the device head. During the release of the stent-valve, by tightening the extension portion 120 of the device, the elastic positioning portion 110 will support the stent-valve, thus preventing the stent-valve from sliding and achieving the effect of accurate positioning.

[0037] In this embodiment, a deformable elastic positioning portion 110 is provided at the front end of the guide positioning mechanism 100, and the extension portion 120 is connected to the elastic deformation portion, and its elastic support first end 121 is moved to any point on the outer surface of the elastic deformation portion, so that the elastic positioning portion 110 can be changed at will during the transmission process, thereby accelerating the transmission efficiency, and the front end portion of the elastic positioning portion 110 is set to be an arc surface convex in the direction away from the extension portion 120, thereby enhancing the protection performance, so that the elastic positioning portion 110 has a larger force area when reaching the inside of the human tissue, thereby avoiding damage; in addition, the first end 121 or the first end 121 and the second end 121 are connected to each other, thereby preventing damage. A point between the ends 122 is the connection point 111, and the distance between the first end 121 and the connection point 111 is smaller than the distance between the distal end 112 and the connection point 111, so that the first end 121 is the connection point 111 or is located in the hollow interior of the elastic positioning part 110, which is convenient for forming different deformation shapes and suitable for surgeries in different situations, thereby enhancing the applicability of the device; in addition, the mesh hollow structure facilitates the transmission of ultrasonic signals, can enhance the positioning function, and optimize the visibility of the guide positioning mechanism 100 during the transmission process. The device has been improved in many aspects, which has overall improved the practicality of the medical guide positioning device.

[0038] Preferably, as shown in FIG1 , a notch 303 is formed on the sidewall of the loading mechanism 300, through which the extension 120 can pass. The loading mechanism 300 includes a smooth section 310 and a flared section 320, which are connected in sequence from front to back. The smooth section 310 has a uniform diameter, while the flared section 320 gradually increases in diameter from front to back. Thus, when inserting the guide positioning mechanism 100, the extension 120 is first inserted from the loading end 302 and pulled out from the notch 303, thereby pulling the elastic positioning portion 110 from the flared section 320 into the smooth section 310, and then further transported into the catheter 200. This solves the problem of the elastic positioning portion 110 being relatively soft and difficult to enter the catheter 200, thereby improving transport efficiency.

[0039] The elastic positioning portion 110 of this embodiment can be configured in various shapes, which will be described in detail in the following embodiments.

[0040] Example 2

[0041] As shown in Figure 2, the elastic positioning portion 110 of this embodiment is approximately umbrella-shaped. Specifically, when in the initial state, the elastic positioning portion 110 includes an outer surface and an inner surface that are smoothly connected and spaced apart. The outer surface and the inner surface are both arc surfaces that bulge away from the extension portion 120. The surface area of ​​the inner surface is smaller than the surface area of ​​the outer surface, and the first end 121 is the connection point 111.

[0042] Example 3

[0043] As shown in Figure 3, the elastic positioning portion 110 of this embodiment is nearly hat-shaped, including an outer convex portion 13 and a bent edge portion 114 connected to each other. The outer convex portion 13 includes an outer arc surface 1131 and an inner arc surface 1132 arranged at intervals. The surface area of ​​the inner arc surface 1132 is smaller than the surface area of ​​the outer arc surface 1131. The outer arc surface 1131 and the inner arc surface 1132 both protrude in a direction away from the extension portion 120. The bent edge portion 114 is bent in a direction perpendicular to the length of the extension portion 120. The bent edge portion 114 includes a first curved surface 1141 and a second curved surface 1142 that are smoothly connected and arranged at intervals. The first curved surface 1141 is connected to the end portion of the inner curved surface 1132, and the second curved surface 1142 is connected to the end portion of the outer curved surface 1131. The first end 121 in the figure is the connection point 111.

[0044] Example 4

[0045] As shown in Figure 4, the elastic positioning portion 110 of this embodiment is a superimposed mesh structure. The elastic positioning portion 110 includes a first mesh and a second mesh connected to each other. The volume of the second mesh is smaller than that of the first mesh and is located in the inner cavity of the first mesh. The first mesh and the second mesh both have an outer arc surface 1131 and an inner arc surface 1132 that are spaced apart and smoothly connected. The surface area of ​​the inner arc surface 1132 is smaller than the surface area of ​​the outer arc surface 1131. The outer arc surface 1131 and the inner arc surface 1132 both protrude in a direction away from the extension portion 120. The first end 121 in the figure is the connection point 111.

[0046] Example 5

[0047] As shown in Figure 5, the elastic positioning portion 110 of this embodiment is gourd-shaped. When in the initial state, the elastic positioning portion 110 includes two spheres with different diameters. The two spheres are arranged from small to large in diameter along the direction away from the first end 121. The centers of the multiple spheres are located on the same straight line with the connection point 111, and the first end 121 is the connection point 111.

[0048] Example 6

[0049] As shown in Figure 6, the elastic positioning portion 110 comprises three spheres of varying diameters, arranged in ascending order of diameter near the first end 121. The spheres' centers are aligned with the connection point 111. This configuration, which includes multiple spheres of varying diameters, facilitates measurement of atrial septal defect diameters.

[0050] Example 7

[0051] As shown in Figure 7, the elastic positioning portion 110 of this embodiment is nearly apple-shaped. When in the initial state, the shape of the elastic positioning portion 110 is oval, the first end 121 extends into the interior of the elastic positioning portion 110, and the point between the first end 121 and the second end 122 is the connection point 111; as shown in Figure 8, it is a schematic diagram of the deformation state of the elastic positioning portion 110 of this shape, in which the first end 121 coincides with the distal end point 112.

[0052] Example 8

[0053] As shown in FIG. 9 , in the initial state, the elastic positioning portion 110 of this embodiment is configured to be spherical, and the first end 121 is the connection point 111 .

[0054] Example 9

[0055] As shown in Figure 10, in the initial state, the elastic positioning portion 110 of this embodiment is set to be nearly heart-shaped, including a first arcuate surface 115 at the front end and a second arcuate surface 116 connected to the extension portion 120. The first arcuate surface 115 and the second arcuate surface 116 are connected by a third arcuate surface 117, and the convex direction of the second arcuate surface 116 is opposite to the convex direction of the first arcuate surface 115.

[0056] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

[0057] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A medical guiding and positioning device, characterized in that: include: A guiding and positioning mechanism, the guiding and positioning mechanism comprising an elastic positioning portion and an extending portion; The elastic positioning part is a hollow mesh body, the front end of which is an arc surface convex in the direction away from the extension part, the connection between the elastic positioning part and the extension part is a connection point, and the elastic positioning part has an initial state and a deformed state; The extension portion has a first end and a second end opposite to each other, the first end is close to the elastic positioning portion, and a lead wire of a certain length is between the first end and the second end; In the initial state, the point on the elastic positioning portion that is farthest from the connection point is the distal end point, and both the connection point and the distal end point are located on the axis of the elastic positioning portion, the first end or a point between the first end and the second end is the connection point, and the distance between the first end and the connection point is smaller than the distance between the distal end point and the connection point; When in the deformed state, the elasticity of the elastic positioning portion is configured to support the first end to move to any point on the outer surface of the elastic positioning portion.

2. The medical guiding and positioning device according to claim 1, characterized in that: In the initial state, the elastic positioning portion includes an outer surface and an inner surface that are smoothly connected and spaced apart, the outer surface and the inner surface are both arc surfaces convex away from the extension portion, and the surface area of ​​the inner surface is smaller than that of the outer surface.

3. The medical guiding and positioning device according to claim 1, characterized in that: When in the initial state, the elastic positioning portion includes an outer convex portion and a bent edge portion connected to each other, the outer convex portion includes an outer arc surface and an inner arc surface arranged at intervals, the surface area of ​​the inner arc surface is smaller than the surface area of ​​the outer arc surface, the outer arc surface and the inner arc surface both protrude in a direction away from the extension portion, the bent edge portion is bent in a direction perpendicular to the length of the extension portion, the bent edge portion includes a first curved surface and a second curved surface that are smoothly connected and arranged at intervals, the first curved surface is connected to the end portion of the inner curved surface, and the second curved surface is connected to the end portion of the outer curved surface.

4. The medical guiding and positioning device according to claim 1, characterized in that: When in the initial state, the elastic positioning portion includes a first mesh body and a second mesh body connected to each other, the volume of the second mesh body is smaller than that of the first mesh body and is located in the inner cavity of the first mesh body, the first mesh body and the second mesh body both have an outer arc surface and an inner arc surface that are spaced apart and smoothly connected, the surface area of ​​the inner arc surface is smaller than the surface area of ​​the outer arc surface, and the outer arc surface and the inner arc surface both protrude in a direction away from the extension portion.

5. The medical guiding and positioning device according to claim 1, characterized in that: In the initial state, the elastic positioning portion includes at least two spheres with different diameters, and the centers of the multiple spheres are located on the same straight line as the connection point.

6. The medical guiding and positioning device according to claim 1, characterized in that: In the initial state, the elastic positioning portion has a shape of a sphere, an ellipsoid or an oval.

7. The medical guiding and positioning device according to claim 1, characterized in that: When in the initial state, the elastic positioning portion includes a first arcuate surface at the front end portion and a second arcuate surface connected to the extension portion, the first arcuate surface and the second arcuate surface are connected by a third arcuate surface, and the convex direction of the second arcuate surface is opposite to the convex direction of the first arcuate surface.

8. The medical guiding and positioning device according to any one of claims 1 to 7, characterized in that: It also includes a catheter and a loading mechanism. The loading mechanism is a hollow tube with a connecting end and a loading end opposite to each other. The connecting end is connected to the end of the catheter. The guiding and positioning mechanism enters into the loading mechanism from the loading end.

9. The medical guiding and positioning device according to claim 8, characterized in that: A notch is provided on the side wall between the connecting end and the loading end, and the notch is configured to support the extension portion to pass through.

10. The medical guiding and positioning device according to claim 9, characterized in that: The loading mechanism comprises a smooth section and an outward expansion section which are sequentially connected from front to back, the tube diameter of the smooth section is consistent, and the tube diameter of the outward expansion section gradually increases from front to back.

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