An eccentric laser catheter with expanded capacity

Abstract

The invention discloses an eccentric laser catheter with expansion capacity. An eccentric laser catheter with expansion capacity includes a hollow handle and a catheter, the catheter includes an inner catheter and an outer catheter arranged inside and outside, the inner catheter is used to pass through the guide wire, a laser area is formed between the inner catheter and the outer catheter, and a laser beam is penetrated in the laser area; the inner catheter is close to one side of the outer catheter; the inner wall of the inner catheter is fixedly connected with a rotating linkage mechanism, the rotating linkage mechanism includes a rotating shaft and an annular linkage member, an axially arranged annular linkage member is installed in the inner catheter, and the annular linkage member is connected to the rotating shaft; the inner cavity of the annular linkage member is used to pass through the guide wire; the catheter is rotatably connected to the hollow handle with the central axis of the rotating shaft as the rotation center line, and the end of the catheter is eccentrically arranged on the inner side of the hollow handle and also includes a rotating mechanism for driving the outer tube to rotate with the central axis of the rotating shaft as the rotation center. The present invention achieves the purpose of expanding the lumen.

Description

Technical Field

[0001] The invention relates to the field of laser catheters, and in particular to an eccentric laser catheter with expanded capacity. Background Art

[0002] Atherosclerosis (AS) is the main cause of coronary heart disease, cerebral infarction, and peripheral vascular disease. At present, vascular interventional treatment mainly uses mechanical methods to reshape diseased blood vessels, and restores the normal diameter of narrowed or dissected blood vessels through balloon dilation and stenting, thereby achieving the purpose of restoring blood supply. When a narrow plaque appears in a blood vessel that the balloon cannot pass through, it is necessary to first remove the intravascular plaque, such as laser.

[0003] The laser catheter currently used in clinical practice is designed with a coaxial structure, and the guidewire cavity and the optical fiber cavity are radially arranged inside and outside. For example, the laser catheter with adjustable laser energy in a single optical fiber with dual optical paths disclosed in the publication number CN115337102A cannot achieve circumferential adjustment of the laser area due to the circumferential rotation of the laser catheter, which limits the laser area and is not conducive to blood vessels. If there is a plaque on one side of the blood vessel, it is difficult for the laser catheter to ablate the plaque on one side. Summary of the invention

[0004] The present invention aims at solving the problems and shortcomings of the prior art and provides an eccentric laser catheter with expanded capacity.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides an expanded eccentric laser catheter, comprising a hollow handle and a catheter, characterized in that the catheter comprises an inner catheter and an outer catheter arranged inside and outside, the inner catheter is used to pass a guide wire, a laser area is enclosed between the inner catheter and the outer catheter, and a laser beam is passed through the laser area;

[0007] A metal ring is fixed to the end of the outer catheter away from the hollow handle;

[0008] The inner catheter is closely attached to one side of the outer catheter;

[0009] The inner wall of the inner conduit is fixedly connected with a rotation linkage mechanism, the rotation linkage mechanism includes a rotation shaft and an annular linkage member, the inner conduit is equipped with the annular linkage member arranged axially, and the annular linkage member is connected to the rotation shaft.

[0010] The connection between the inner conduit and the outer conduit and the connection between the annular linkage and the rotating shaft are located in the same radial direction of the rotating shaft;

[0011] The inner cavity of the annular linkage is used for passing a guide wire;

[0012] The catheter is rotatably connected to the hollow handle with the central axis of the rotating shaft as the rotation center line, and the end of the catheter is eccentrically arranged on the inner side of the hollow handle;

[0013] Also includes a rotating mechanism for driving the outer tube to rotate with the central axis of the rotating shaft as the rotation center, the rotating mechanism includes a first rotating sleeve for connecting the outer tube and a second rotating sleeve for connecting the rotating shaft;

[0014] The first rotating sleeve is located at one end of the hollow handle adjacent to the metal ring, and the second rotating sleeve is located at one end of the hollow handle away from the metal ring;

[0015] The first rotating sleeve is connected to the outer tube via a first connecting member;

[0016] The second rotating sleeve is connected to the rotating shaft via a second connecting member;

[0017] The first rotating sleeve and the second rotating sleeve are connected via a connecting rod.

[0018] The present invention optimizes the structure of the laser catheter so that when the rotating sleeve rotates circumferentially relative to the hollow handle, the optical fiber bundle is driven to rotate circumferentially around the rotating axis, thereby facilitating circumferential adjustment of the laser area and increasing the area of ​​the lumen obtained after ablation of intravascular plaques, thereby achieving the purpose of lumen expansion.

[0019] The flexibility of the catheter is ensured by the axially arranged annular linkage parts, and the annular linkage parts have a certain hardness, and can drive the catheter to rotate when rotating.

[0020] Further preferably, the hollow handle is connected and docked with one end of an extracorporeal transition tube, a fiber optic connector is fixed to the other end of the extracorporeal transition tube, one end of the fiber optic bundle is connected to the fiber optic connector, and the other end of the fiber optic bundle passes through the outer catheter area inside the hollow handle and the outer catheter area outside the hollow handle;

[0021] The end of the optical fiber bundle away from the hollow handle is fixed in the outer catheter by adhesive;

[0022] The optical fiber bundle located at the hollow handle has redundant length.

[0023] The optical fiber bundle has a telescopic space and length when the outer catheter is rotated.

[0024] Further preferably, the end of the hollow handle is provided with a connection port for extending the catheter;

[0025] The diameter of the outer wall of the outer conduit is half of the inner diameter of the connecting port.

[0026] Further preferably, a metal positioning sheet is fixed on the connecting rod;

[0027] A limiting groove for embedding the metal positioning sheet is provided on the outer wall of the hollow handle.

[0028] Facilitates positioning during rotation.

[0029] Further preferably, the hollow handle is provided with circumferentially arranged limiting grooves;

[0030] The outer wall of the outer conduit is provided with an elastic buckle for embedding into the limiting groove.

[0031] During the circumferential rotation of the outer catheter, the elastic buckle is inserted into the limiting groove to produce a jam, thereby positioning the rotation angle; if a larger force is continued to be applied, the elastic buckle leaves the groove and continues to rotate, thereby causing the outer catheter to rotate, changing the laser area to change the plaque ablation position.

[0032] Further preferably, the outer wall of the hollow handle is provided with marking scale lines corresponding to the limiting grooves one by one along the circumferential direction.

[0033] Further preferably, the inner catheter is connected to the outer catheter at one side adjacent to the center of the hollow handle;

[0034] The side of the annular linkage member adjacent to the center of the hollow handle is connected to the rotating shaft.

[0035] Further preferably, the inner conduit comprises a hard support portion and a flexible steering portion alternately connected in the axial direction;

[0036] The annular linkage member is fixed to the rigid support portion;

[0037] The flexible steering portion is a bellows.

[0038] Further preferably, a limiting protrusion is provided on the outer wall of the rotating shaft;

[0039] A groove for embedding the limiting protrusion is arranged in the through hole.

[0040] The linkage facilitates circumferential rotation.

[0041] Further preferably, the inner conduit is provided with strip-shaped protrusions;

[0042] The annular linkage member is provided with a notch which is slidably connected to the strip-shaped protrusion.

[0043] Easy to assemble.

[0044] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0045] The positive and progressive effects of the present invention are:

[0046] The eccentric structural design of the present invention can expand the laser treatment area of ​​the laser region and perform eccentric plaque ablation, thereby increasing the lumen area obtained after intravascular plaque ablation, thereby achieving the purpose of lumen expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of a specific embodiment 1 of the present invention;

[0048] Figure 2 It is a cross-sectional view of the first rotating collar of the specific embodiment 1 of the present invention;

[0049] Figure 3 It is a cross-sectional view of the second rotating ring of the specific embodiment 1 of the present invention;

[0050] Figure 4 In the specific embodiment 1 of the present invention, during the circumferential rotation of the first rotating ring Figure 2 Schematic diagram of changes in

[0051] Figure 5 It is a partial schematic diagram of the connection between the outer catheter and the hollow handle of the specific embodiment 3 of the present invention;

[0052] Figure 6 It is a partial cross-sectional view of the inner catheter of specific embodiment 4 of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0054] like Figure 1 as well as Figure 2As shown, in specific embodiment 1, an expanded eccentric laser catheter comprises a hollow handle 1 and a catheter, wherein the catheter comprises an inner catheter and an outer catheter 2 arranged inside and outside, wherein the inner catheter is used to pass through a guide wire, and a laser region is formed between the inner catheter and the outer catheter 2, wherein a laser beam is passed through the laser region; a metal ring 3 is fixed to the end of the outer catheter 2 away from the hollow handle 1; the inner catheter is close to one side of the outer catheter 2; a rotating linkage mechanism is fixedly connected to the inner wall of the inner catheter, and the rotating linkage mechanism comprises a rotating shaft 5 and an annular linkage member 4, and an axially arranged annular linkage member 4 is installed in the inner catheter, and the annular linkage member 4 is linked to the rotating shaft 5. The inner cavity of the annular linkage member 4 is used to pass through the guide wire; the catheter is rotatably connected to the hollow handle 1 with the central axis of the rotating shaft 5 as the rotation center line, and the end of the catheter is eccentrically arranged on the inner side of the hollow handle 1.

[0055] It also includes a rotating mechanism for driving the outer tube to rotate with the central axis of the rotating shaft 5 as the rotating center, and the rotating mechanism includes a first rotating sleeve for connecting the outer tube and a second rotating sleeve for connecting the rotating shaft 5; the first rotating sleeve 11 is located at one end of the hollow handle 1 adjacent to the metal ring 3, and the second rotating sleeve 12 is located at one end of the hollow handle 1 away from the metal ring 3; the first rotating sleeve 11 is connected to the outer tube through a first connecting member 13; the second rotating sleeve 12 is connected to the rotating shaft 5 through a second connecting member 14. The second connecting member can be connected to the annular linkage member 4 located at the end. The first rotating sleeve and the second rotating sleeve are connected by a connecting rod 15.

[0056] like Figure 4 As shown in (a), (b), (c), and (d), the rotation of the first rotating sleeve 11 drives the outer catheter 2 to rotate 360°, and the first rotating sleeve 11 rotates around the rotating shaft 5. At this time, the second rotating sleeve 12 is connected to the rotating shaft 5 through the second connecting member 14. At the same time, the second rotating sleeve 12 can also be driven to rotate around the rotating shaft 5.

[0057] The present invention optimizes the structure of the laser catheter, so that when the rotating sleeve rotates circumferentially relative to the hollow handle 1, the optical fiber bundle is driven to rotate circumferentially around the rotating axis, which is convenient for circumferential adjustment of the laser area, and is also used to increase the lumen area obtained after the ablation of intravascular plaque, thereby achieving the purpose of lumen expansion. The axially arranged annular linkage parts facilitate the flexibility of the catheter. The annular linkage parts also have a certain hardness, and when rotating, they can drive the catheter to rotate.

[0058] One end of the connecting rod is detachably connected to the first rotating sleeve, and the other end of the connecting piece is detachably connected to the second rotating sleeve.

[0059] The hollow handle 1 is connected and docked with one end of the extracorporeal transition tube, and a fiber optic connector is fixed to the other end of the extracorporeal transition tube. One end of the fiber optic bundle is connected to the fiber optic connector, and the other end of the fiber optic bundle passes through the outer catheter 2 area inside the hollow handle 1 and the outer catheter 2 area outside the hollow handle 1; the end of the fiber optic bundle away from the hollow handle 1 is fixed in the outer catheter 2 by adhesive; the fiber optic bundle located at the hollow handle 1 has redundant length. It is convenient for the fiber optic bundle to have a telescopic space and length when the outer catheter 2 rotates.

[0060] The end of the hollow handle 1 is provided with a connection port for the catheter to extend out; the diameter of the outer wall of the outer catheter 2 is half of the inner diameter of the connection port. The guide wire extends from the right end of the hollow handle into the inner catheter.

[0061] The inner tube is connected to the outer tube 2 at one side near the center of the hollow handle 1, and the annular linkage is connected to the rotating shaft at one side near the center of the hollow handle 1. The connection between the annular linkage and the rotating shaft and the connection between the inner tube and the outer tube are arranged inside and outside in the radial direction of the rotating shaft.

[0062] Specific embodiment 2, on the basis of specific embodiment 1, a metal positioning piece is fixed on the connecting rod; a limiting groove for embedding the metal positioning piece is provided on the outer wall of the hollow handle. It is convenient for positioning during the rotation process. The outer wall of the hollow handle is provided with marking scale lines corresponding to the limiting grooves along the circumferential direction. The number of limiting grooves can be 4, which are 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock in the clock direction. When using it, the doctor can first operate in the 12 o'clock direction, which is convenient for observing the rotation angle later.

[0063] See also Figure 5 , Specific embodiment 3, on the basis of specific embodiment 1, the hollow handle is provided with circumferentially arranged limit grooves 17; the outer wall of the outer catheter is provided with an elastic buckle 18 for embedding in the limit groove 17. It is convenient for the outer catheter to be stuck in the limit groove during the circumferential rotation to achieve the positioning of the rotation angle; continue to apply a larger force, the elastic buckle leaves the groove and continues to rotate, thereby causing the outer catheter to rotate, changing the laser area to change the plaque ablation position. The outer wall of the hollow handle is provided with marking scale lines corresponding to the limit grooves one by one along the circumferential direction. The number of limit grooves can be 4, namely 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock in the clock direction. When using it, the doctor can first operate in the 12 o'clock direction, which is convenient for observing the rotation angle later.

[0064] See also Figure 6 , Specific embodiment 4, on the basis of specific embodiment 1, the inner catheter includes a hard support portion 31 and a flexible steering portion 32 alternately connected in the axial direction; the hard support portion 31 is fixed with an annular linkage 4; the flexible steering portion 32 is a bellows.

[0065] Specific embodiment 5, based on specific embodiment 1, a limiting protrusion is provided on the outer wall of the rotating shaft; a groove for embedding the limiting protrusion is provided in the through hole, so as to facilitate the linkage of circumferential rotation. The cross section of the rotating shaft is gear-shaped.

[0066] Specific embodiment 6, based on specific embodiment 1, the inner conduit is provided with a strip-shaped protrusion; the annular linkage is provided with a notch for slidingly connecting the strip-shaped protrusion, which is convenient for assembly. The strip-shaped protrusion is the axial direction of the inner conduit.

[0067] Specific embodiment 7, based on specific embodiment 1, the connecting rod includes a first fixed support portion, a rotating portion and a second fixed support portion connected in sequence. The rotating portion is circumferentially connected to the first fixed support portion and the second fixed support portion. The rotating portion is a U-shaped bending structure. It is convenient to avoid the extracorporeal transition tube on the hollow handle.

[0068] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An expanded eccentric laser catheter, comprising a hollow handle and a catheter, characterized in that: The catheter comprises an inner catheter and an outer catheter arranged inside and outside, the inner catheter is used to pass the guide wire, a laser area is surrounded by the inner catheter and the outer catheter, and a laser beam is arranged in the laser area; A metal ring is fixed to the end of the outer catheter away from the hollow handle; The inner catheter is closely attached to one side of the outer catheter; The inner wall of the inner conduit is fixedly connected with a rotation linkage mechanism, the rotation linkage mechanism comprises a rotation shaft and an annular linkage member, the inner conduit is provided with the annular linkage member arranged axially, and the inner side of the annular linkage member is connected with the rotation shaft; The connection between the inner conduit and the outer conduit and the connection between the annular linkage and the rotating shaft are located in the same radial direction of the rotating shaft; The inner cavity of the annular linkage is used to pass a guide wire; The connection between the annular linkage and the rotating shaft and the connection between the inner conduit and the outer conduit are arranged inside and outside in the radial direction of the rotating shaft; It also includes a rotating mechanism for driving the outer catheter to rotate with the central axis of the rotating shaft as the rotation center, the rotating mechanism includes a first rotating sleeve for connecting the outer catheter and a second rotating sleeve for connecting the rotating shaft; the first rotating sleeve is located at an end of the hollow handle adjacent to the metal ring, the second rotating sleeve is located at an end of the hollow handle away from the metal ring, the first rotating sleeve is connected to the outer catheter through a first connecting member; the second rotating sleeve is connected to the rotating shaft through a second connecting member; the first rotating sleeve and the second rotating sleeve are connected by a connecting rod; The hollow handle is connected and docked with one end of the extracorporeal transition tube, a fiber optic connector is fixed to the other end of the extracorporeal transition tube, one end of the fiber optic bundle is connected to the fiber optic connector, and the other end of the fiber optic bundle passes through the outer catheter area inside the hollow handle and the outer catheter area outside the hollow handle; The end of the optical fiber bundle away from the hollow handle is fixed in the outer catheter by adhesive; The optical fiber bundle located at the hollow handle has redundant length.

2. The eccentric laser catheter with expanded capacity as claimed in claim 1, characterized in that: The end of the hollow handle is provided with a connection port for extending the catheter; The diameter of the outer wall of the outer conduit is half of the inner diameter of the connecting port.

3. The eccentric laser catheter with expanded capacity as claimed in claim 1, characterized in that: A metal positioning sheet is fixed on the connecting rod; A limiting groove for embedding the metal positioning piece is provided on the outer wall of the hollow handle; The outer wall of the hollow handle is provided with marking scale lines corresponding to the limiting grooves one by one along the circumferential direction.

4. The eccentric laser catheter with expanded capacity as claimed in claim 1, characterized in that: The hollow handle is provided with circumferentially arranged limiting grooves; The outer wall of the outer conduit is provided with an elastic buckle for embedding into the limiting groove; The outer wall of the hollow handle is provided with marking scale lines corresponding to the limiting grooves one by one along the circumferential direction.

5. The eccentric laser catheter with expanded capacity as claimed in claim 1, characterized in that: The inner conduit is connected to the outer conduit at one side adjacent to the center of the hollow handle; The side of the annular linkage member adjacent to the center of the hollow handle is connected to the rotating shaft; The connection point between the inner conduit and the outer conduit and the connection point between the annular linkage and the rotating shaft are located in the same radial direction of the rotating shaft.

6. The expanded eccentric laser catheter according to claim 1, characterized in that: The inner conduit comprises a hard support portion and a flexible steering portion which are alternately connected in the axial direction; The annular linkage member is fixed to the rigid support portion; The flexible steering portion is a bellows.

7. The expanded eccentric laser catheter according to claim 1, characterized in that: The connecting rod comprises a first fixed support portion, a rotating portion and a second fixed support portion which are connected in sequence; The rotating part is connected to the first fixed support part and the second fixed support part in a circumferential rotation direction; The rotating part is a U-shaped bending structure.

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