Angle-adjustable guide column suitable for both CT and MRI puncture positioning

Abstract

The present invention relates to an angle-adjustable guide column which can be used for both CT and magnetic resonance puncture positioning, comprising a column body, wherein the column body is provided with a channel formed by an axial through hole, the column body adopts a hollow structure, and is provided with an inner cavity, wherein the inner cavity of the column body is filled with a developer, and the column body has several forms such as single, row, detachable, and groupable, and can be adapted to CT or MR detection at the same time.

Description

Technical Field

[0001] The invention relates to an angle-adjustable guide column which can be simultaneously applied to CT and magnetic resonance puncture positioning and belongs to the technical field of medical equipment. Background Art

[0002] At present, most of the guiding devices used for CT-guided puncture biopsy or treatment in clinical practice are positioning templates. The positioning templates are square plates with many holes, which can be called channels, for guiding the puncture needle. The disadvantage of this guiding positioning device is that the channels are fixed, and the angle and number are not adjustable. In particular, all existing products are made of engineering plastics or ABS, which can only be used under CT and cannot be used under magnetic resonance imaging. Therefore, there are currently no similar products that can be used under magnetic resonance imaging, which greatly restricts the practical application of magnetic resonance guidance. Due to the advantages of magnetic resonance imaging, biopsy and treatment under magnetic resonance guidance also have obvious advantages. It is very necessary to explore a guiding device that can be used under both CT and magnetic resonance imaging. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides an angle-adjustable guide column which can be applied to both CT and MRI puncture positioning, so as to be adaptable to both CT and MRI and convenient to use.

[0004] The technical solution of the present invention is: an angle-adjustable guide column that can be used for CT and magnetic resonance puncture positioning at the same time, including a column body, the column body is provided with a channel composed of axial through holes, the column body adopts a hollow structure, and is provided with an inner cavity, and the inner cavity of the column body is filled with developer.

[0005] The developer is preferably an oily liquid.

[0006] The developer may be cod liver oil.

[0007] Mutually symmetrical convex columns or concave holes may be provided on two opposite side surfaces of the column, and the axes of the convex columns or concave holes are preferably perpendicular to the side surfaces of the column on which they are located.

[0008] The number of the holes can be one group or multiple groups.

[0009] The number of holes in the same hole group is one or more.

[0010] The pore sizes of the multiple pores in the same group of pores are preferably different.

[0011] The pore structures of different groups are preferably the same.

[0012] The hole is preferably located on the midline of the left-right direction.

[0013] The column can be formed by two half-columns distributed on the left and right and plugged into each other, and the half-columns are provided with independent inner cavities.

[0014] The plug-in structure of the semi-cylinder may include a convex plug-in structure and a concave plug-in structure symmetrically arranged on both sides of the mating surface, and the convex plug-in structure is in a shape that is plug-matched with the concave plug-in structure.

[0015] The front side surface of the column may be provided with a front inter-column plug-in structure, and the rear side surface of the column may be provided with a rear inter-column plug-in structure, and the front inter-column plug-in structure is in a shape that is plug-matched with the rear inter-column plug-in structure.

[0016] The front inter-column plug-in structure is preferably one or more vertical protrusion structures located on the front side of the column, and the rear inter-column plug-in structure is preferably one or more vertical groove structures located on the rear side of the column.

[0017] The cross section of the vertical protrusion structure is preferably an isosceles trapezoid that is wide at the front and narrow at the back, and the cross section of the vertical groove structure is preferably an isosceles trapezoid that is wide at the inside and narrow at the outside.

[0018] When in use, the guide column is rotatably mounted on a fixed frame through a matching clamp or positioning device. According to actual needs, under the guidance of CT or MR images, the position and angle of the guide column are set or adjusted, and the puncture needle is inserted along the hole on the guide column for puncture.

[0019] Since the guide column adopts a hollow structure, the internal cavity is filled with a developer that can be adapted to CT or MR at the same time, so it is not only adapted to CT, but also to MR, overcoming the defect that the existing puncture guide device cannot be displayed under MR, providing a basis for the application of MR guidance, and eliminating the corresponding obstacles that currently hinder the application of MR guidance; since the developer can be an oily liquid, non-toxic and environmentally friendly substances such as cod liver oil can be selected, which can be in close contact with the skin and is safe; since the display is displayed by the oily liquid filled in the cavity, the guide column can be made of commonly used surgical instrument materials such as engineering plastics or ABS materials, with mature technology and low cost; since the guide column has several forms such as single, row (with multiple groups of channels), detachable (formed by two half-columns plugged into each other), and groupable (plugged in sequence from front to back), it can be well adapted to different application occasions. For example, when the guide column or its auxiliary facilities need to be removed during puncture or treatment, a detachable guide column can be selected; when the number of guide columns needs to be increased or decreased, a groupable guide column can be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 a perspective schematic diagram of the illustrated embodiment;

[0022] Figure 3 yes Figure 1 A schematic longitudinal section of the embodiment shown;

[0023] Figure 4 yes Figure 1 A cross-sectional schematic diagram of the illustrated embodiment;

[0024] Figure 5 is a top view schematic diagram of another embodiment of the present invention;

[0025] Figure 6 is a schematic top view of a third embodiment of the present invention;

[0026] Figure 7 is a schematic top view of a fourth embodiment of the present invention;

[0027] Figure 8 yes Figure 5 A schematic diagram of a top view of the embodiment shown;

[0028] Fig. 9 yes Figure 6 A schematic diagram of a top view of the embodiment shown;

[0029] Fig.10 yes Figure 6 A schematic cross-sectional view of a half cylinder of the illustrated embodiment;

[0030] Fig.11 is a schematic top view of a fifth embodiment of the present invention;

[0031] Fig.12 Is multiple Fig.11 A schematic diagram of the front and rear plug-in combination of the illustrated embodiment;

[0032] Fig.13 is based on Fig.11 A schematic diagram of the improved front and rear plug-in combination of the illustrated embodiment;

[0033] Fig.14 is a schematic diagram of a sixth embodiment;

[0034] Fig.15 This is a schematic diagram of the structure of an injection hole;

[0035] Fig.16 2 is a schematic top view of a sixth embodiment of the present invention. DETAILED DESCRIPTION

[0036] See also Figure 1-16 The angle-adjustable guide column of the present invention, which can be used for both CT and MRI puncture positioning, includes a column body 10, and the column body is provided with a channel 40 consisting of an axial through hole.

[0037] The cross-sectional shape of the column can be circular, square, elliptical, elongated, equilateral hexagonal, etc., and can be set according to usage requirements.

[0038] The hole can usually be a round hole, and according to actual needs, other shapes of through holes can also be used.

[0039] The column adopts a hollow structure and is provided with an inner cavity 12 , and the inner cavity of the column is filled with a developer.

[0040] An injection hole 50 connected to the inner cavity of the column can be provided, through which developer is injected into the inner cavity to fill the inner cavity, and a plug can be provided on the injection hole to block it and prevent the developer from flowing out.

[0041] Usually, the number of the injection holes may be two, one for injecting the developer and the other for ventilation during injection.

[0042] Typically, the injection hole is disposed on the top shell 17 of the column.

[0043] The plug can adopt any suitable existing technology to seal the injection hole and fix it on the column.

[0044] For example, a sealing plug 54 is provided in the injection hole 50. The sealing plug is cylindrical and made of elastic materials such as rubber. Its outer diameter (diameter in a free state) is roughly equal to (equal to, slightly larger than, or slightly smaller than) the inner diameter of the injection hole. The inner end of the injection hole is provided with an annular flange 52 protruding radially inward. The inner diameter of the annular flange is smaller than the outer diameter of the sealing plug. The near outer end area of ​​the injection hole is provided with a thread and is screwed with a plug or a plug bolt 56 (a bolt for plugging the injection hole). The sealing disk is located between the inner end of the thread plug or plug bolt and the annular flange. A hard (e.g., metal) annular pressing plate 57 is provided or not provided between the inner end of the thread plug or plug bolt and the sealing plug. The outer diameter of the annular pressing plate is smaller than the inner diameter of the injection hole and larger than the inner diameter of the annular flange. The thread plug or plug bolt is tightened to press the inner end face of the sealing plug against the outer end face of the annular flange, thereby blocking the medium channel in the middle of the annular flange, thereby achieving the blocking of the injection hole (see Fig.15 ).

[0045] The developing solution is a liquid having a developing effect in both CT and MR detection.

[0046] The developer may be an oily liquid, for example, preferably cod liver oil.

[0047] Symmetrical convex columns (protrusions) 14 or concave holes (blind holes) are provided on two opposite sides of the column, and the axes of the convex columns or concave holes are perpendicular to the sides of the column where they are located. The column can be positioned (limited), fixed and rotatably connected through the convex columns or concave holes.

[0048] The number of the holes can be one group or multiple groups.

[0049] The number of channels in the same channel group can be one or more.

[0050] The apertures of the multiple channels in the same group of channels may be different to accommodate different puncture needles and the like.

[0051] The channel structures of different groups (the number of channels in each group, the distribution of channels and the aperture of corresponding channels, etc.) can be the same, which is equivalent to arranging multiple identical guide units on the same column, and each guide unit is provided with a group of channels.

[0052] The hole is preferably located on the midline of the left-right direction.

[0053] When there is only one hole, the hole is preferably located in the center of the midline dividing the left and right directions.

[0054] When the column is provided with a plurality of groups of holes, the groups of holes are preferably evenly distributed on the midline of the column in the left-right direction.

[0055] The column may be integral (see Figure 1-4 and Fig.11 , Fig.14 ), or it can be split (see Figure 5-10 ).

[0056] The split column is formed by two half-columns 20 distributed on the left and right and plugged into each other. The half-columns are provided with independent inner cavities (see Fig.10 ).

[0057] The shape of the semi-cylinder is the shape of half a cylinder formed by longitudinally sectioning the cylinder through its midline in the left and right directions. The section corresponding to the inner cavity is a closed surface, forming a mating surface (a surface that mates with each other after insertion), and making their respective inner cavities closed and independent of each other.

[0058] The mating surfaces of the semi-cylinders are provided with plug-in structures for mutual plugging.

[0059] The shapes of the semi-cylinders are the same to facilitate processing, manufacturing and on-site assembly. In this case, a convex plug-in structure and a concave plug-in structure are usually symmetrically arranged, and the convex plug-in structure is in a shape that can be plugged into the concave plug-in structure (a matching mode that can be inserted into the concave plug-in structure and form an effective connection), so that the two semi-cylinders plugged into each other are in a 180° rotationally symmetrical shape, and any semi-cylinder can be placed on the left or on the right. Using semi-main bodies of the same shape can facilitate product processing and on-site assembly, which is conducive to reducing costs and is convenient for users.

[0060] For example, the semi-cylinder plug-in structure may include a convex plug-in structure 25 and a concave plug-in structure 26 symmetrically arranged on both sides of the mating surface, and the convex plug-in structure is in a shape that is plug-matched with the concave plug-in structure.

[0061] Typically, the convex plug-in structure and the concave plug-in structure are both vertical columns, and the cross-section is preferably a right-angled trapezoid. The outer side surfaces constituting the straight sides (right-angled waists) are aligned with the corresponding side surfaces of the semi-cylinder and are located on the same plane. The convex plug-in structure is wide outside and narrow inside, while the concave plug-in structure is wide inside and narrow outside, and they are not easy to separate after being plugged into each other.

[0062] The cross-section of the convex plug structure is similar in shape to that of the concave plug structure and is equal to or slightly smaller in size than the concave plug structure to achieve an effective and reliable plug connection.

[0063] A vertical groove 42 in the shape of half a channel is provided in the center of the mating surface of the semi-cylinder, so that when the two semi-cylinders are plugged together, the two grooves are combined to form a channel. For example, when the channel is a circular hole, a vertical semicircular groove (the cross section of the groove is in the shape of a semicircle) is provided in the center of the mating surface of the semi-cylinder.

[0064] The front side of the column is provided with a front column plug-in structure, and the rear side of the column is provided with a rear column plug-in structure, and the front column plug-in structure is in a shape that can be plugged with the rear column plug-in structure (a matching mode that can be plugged with the rear column plug-in structure and form an effective connection) (see Fig.11 Thus, the front inter-column plug-in structure of one column can be plugged into the rear inter-column plug-in structure of another column, so that several columns distributed in the front and back order are connected together in sequence (see Fig.12 ).

[0065] According to actual needs, a column having only a rear column plug-in structure on the rear side and no front column plug-in structure on the front side can be provided, and a column having only a rear column plug-in structure on the rear side and no front column plug-in structure on the front side can be provided. When multiple columns are plugged together front and back, the column having only a rear column plug-in structure on the rear side and no front column plug-in structure on the front side can be placed in the front, and the column having only a front column plug-in structure on the front side and no rear column plug-in structure on the rear side can be placed in the back, so that the front side of the column group composed of multiple columns plugged in front and back is a plane (without the front column plug-in structure), and the rear side is also a plane (without the rear column plug-in structure), so as to facilitate use (see Fig.13 ).

[0066] The front inter-column plug-in structure may be one or more vertical protrusion structures 35 located on the front side of the column, and the rear inter-column plug-in structure may be one or more vertical groove structures 36 located on the rear side of the column.

[0067] The cross section of the vertical protrusion structure is preferably an isosceles trapezoid that is wide at the front and narrow at the back, and the cross section of the vertical groove structure is preferably an isosceles trapezoid that is wide at the inside and narrow at the outside (commonly known as a dovetail groove).

[0068] When the number of the vertical protrusion structure is one, the vertical protrusion structure is preferably located at the center of the rear side surface of the column (see Fig.11 ); When the number of the vertical protrusion structures is multiple, the multiple vertical protrusion structures are symmetrically distributed on the rear side of the column (see Fig.16 ), accordingly, when the number of the vertical groove structure is one, the vertical groove structure is located at the center of the front side surface of the column, and when the number of the vertical groove structure is multiple, the multiple vertical groove structures are symmetrically distributed on the front side surface of the column.

[0069] Generally, when the column is formed by plugging two left and right half-columns 20 together, a vertical protrusion structure 35 and a vertical groove structure 36 can be respectively provided at the center of the front and rear sides of each half-column (see Fig.16 ).

[0070] The cross-section of the vertical protrusion structure is similar in shape to the cross-section of the vertical groove structure and is equal to or slightly smaller than the cross-section of the vertical groove structure to achieve an effective and reliable plug connection.

[0071] In practice, the basic appearance of the guide column is as follows: the guide column is 15-20mm long (high), 5-10mm in diameter, and the cross section can be square, circular or other polygonal. There can be two symmetrical small protrusions (convex columns) on both sides for installation on the corresponding positioning device, and the protrusions can be used as fulcrums for angle adjustment.

[0072] The internal structure is as follows: the center of the guide column is reserved with special channels of different thicknesses to match different types of puncture needles (usually 18G, but can be thicker or thinner). The main body is a hollow structure filled with greasy liquid and other substances that can be used for CT or MR imaging, so as to facilitate positioning and imaging. Usually, greasy liquid has low density on CT and high signal on MR, which is convenient for imaging and positioning.

[0073] Series design: Series design can be used, divided into several basic types, including: single fixed type (see Figure 1 ), single detachable (see Figure 5 ), fixed type (see Fig.15 ), townhouse detachable type (see Figure 7 ), any combination (see Fig.11 ).

[0074] Single fixed type: can be used alone or in combination and installed on the corresponding positioning device. The guide column is 15-20mm long, 5-10mm in diameter, and has a square, circular or polygonal cross section. There are two symmetrical small protrusions on both sides, which are used to be installed on the corresponding positioning device, and the protrusions can be used as fulcrums for angle adjustment. The central reserved channel is used to guide the puncture needle. The main body is hollow and filled with greasy liquid for positioning and development. It cannot be replaced or removed during use.

[0075] Single detachable type: The overall appearance is the same as the single fixed type, but it is divided into two parts with the central reserved channel as the center. The channel of each part is filled with grease. The two parts are combined and fixed by a plug-in structure. It is used in situations where the guide column needs to be separated from the puncture needle during puncture or treatment, such as when the relative position or angle between the positioning device and the puncture needle needs to be changed. The guide column can be quickly replaced when it is damaged.

[0076] Fixed type: Long strip, with symmetrical protrusions on both sides, can provide multiple (more than 2) channels, the channel interval is 5mm, each channel is surrounded by greasy liquid and a certain gap is left for counting and positioning. It can locate and guide multiple puncture needles at the same time, and cannot be replaced or removed during use.

[0077] The appearance of the row detachable type is similar to the row fixed type, and the split design is similar to the single detachable type. It can be split into two parts with the hole as the center, and fixed by the combination of the upper and lower slot structures. The hole of each part is filled with grease. It is used in situations where multiple needles need to be guided at the same time and may be separated from the puncture needle (same as the single split type).

[0078] Usage process: First fix the guide column to the matching positioning device (fixed on the fixing frame), adjust the appropriate angle under the guidance of CT or MR images, and puncture the puncture needle along the reserved channel. During the puncture or treatment process, the positioning device and guide column need to be removed, and the detachable type can be selected.

[0079] The main surgical material of the guide column can be commonly used engineering plastics or ABS material, which is hollow inside and sealed with oily liquid. Both are environmentally friendly materials, non-toxic, and can be in close contact with the skin.

[0080] Unless otherwise specified or one preferred or optional technical means is a further limitation of another technical means, all preferred and optional technical means disclosed in the present invention can be arbitrarily combined to form several different technical solutions.

Claims

1. Angle-adjustable guide column that can be used for both CT and MRI puncture positioning, characterized by It includes a column, which is provided with a channel composed of axial through holes. The column adopts a hollow structure and is provided with an inner cavity. The inner cavity of the column is filled with a developer. The number of the channels is one or more groups, and the number of channels in the same group of channels is one or more. The developer is an oily liquid. Mutually symmetrical convex columns or concave holes are provided on two opposite sides of the column, and the axes of the convex columns or concave holes are perpendicular to the sides of the column where they are located. The apertures of multiple channels in the same group of channels are different, and the channels in different groups have the same structure.

2. The angle-adjustable guide column that can be used for both CT and MRI puncture positioning as claimed in claim 1, characterized in that The developer is cod liver oil.

3. The angle-adjustable guide column that can be used for both CT and MRI puncture positioning as claimed in claim 1, characterized in that The hole is located on the midline of the left-right direction.

4. The angle-adjustable guide column that can be used for both CT and MRI puncture positioning as claimed in claim 3, characterized in that The column is formed by two semi-columns distributed on the left and right and plugged into each other, and the semi-columns are provided with independent inner cavities.

5. The angle-adjustable guide column that can be used for both CT and MRI puncture positioning as claimed in claim 4, characterized in that The plug-in structure of the semi-cylinder comprises a convex plug-in structure and a concave plug-in structure symmetrically arranged on both sides of the mating surface, and the convex plug-in structure is in a shape that is plugged and matched with the concave plug-in structure.

6. The angle-adjustable guide column according to any one of claims 1 to 5, which is applicable to both CT and MRI puncture positioning, characterized in that A front inter-column plug-in structure is disposed on the front side of the column, and a rear inter-column plug-in structure is disposed on the rear side of the column. The front inter-column plug-in structure is in a shape that is plugged and matched with the rear inter-column plug-in structure.

7. The angle-adjustable guide column that can be used for both CT and MRI puncture positioning as claimed in claim 6, characterized in that The front inter-column plug-in structure is one or more vertical protrusion structures located on the front side of the column, and the rear inter-column plug-in structure is one or more vertical groove structures located on the rear side of the column. The cross-section of the vertical protrusion structure is an isosceles trapezoid that is wide in the front and narrow in the back, and the cross-section of the vertical groove structure is an isosceles trapezoid that is wide inside and narrow outside.

Images