Medical guide wire capable of controlling bending angle of head end

Abstract

The utility model relates to a medical guide wire for controlling the bending angle of a head end, which sequentially comprises the head end, a far-end elastic component, a near-end elastic component and a pushing rod from far to near, the head end is connected with the far end of the near-end elastic component through the far-end elastic component, and the near end of the near-end elastic component is connected with the far end of the pushing rod. The center component is arranged in an inner cavity of the far-end elastic component, an inner cavity of the near-end elastic component and an inner cavity of the pushing rod in a penetrating mode, the far end of the center component is connected with the head end through the far-end elastic component, and the near end of the center component extends out of the near end of the pushing rod. According to the utility model, the bending angle of the head end of the guide wire can be accurately adjusted through manual control or assembly of the control device and the handle device; the guide wire has the advantages that the angle of the head end can be adjusted, the adjusting angle is accurate and controllable, the product structure is simple and easy to machine, the handle can be disassembled and assembled at will, the number of bending adjusting angles is large, the bending adjusting angle is accurate, the bending adjusting controllability is excellent, the number of application scenes is large, and the bending adjusting position does not affect the guide wire body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of medical guide wire, specifically to a kind of medical guide wire of control head end bending angle, belong to medical instrument technical field. BACKGROUND

[0002] Guide wire is often called as the opening tool of interventional therapy, and plays the role of guide rail and positioning in the process of interventional therapy for various interventional medical catheter and implanted instrument to enter human cavity. The following problems exist in traditional guide wire: head end is pre-shaped, for example, straight head and elbow. The shape and angle of guide wire head end are determined by processing when leaving factory, and the shape and angle of guide wire head end cannot be adjusted outside the body according to the actual situation of human cavity and operation scene in operation. The guide wire with pre-plasticity can be shaped manually outside the body according to lesion condition and blood vessel condition before being sent into the body, but directly contacting guide wire head end outside the body may affect the surface cleanliness of instrument, and increase the risk of operation. The head end of conventional guide wire is metal material, and the elasticity and toughness of metal itself can cause rebound after shaping, which is not accurate. The shaped elbow may not meet the requirements of operator, and needs to be shaped repeatedly, which consumes time and effort. Moreover, repeated shaping can also reduce the ability of guide wire to pass through lesion, and affect the effect of operation.

[0003] The authorized announcement No. CN 112023226 A discloses a bendable guide wire, which is composed of guide wire head end, elastic component and guide wire rod body. A linkage mechanism is arranged in the guide wire rod body. The linkage mechanism has recessed linkage ball and convex linkage ball which are engaged with each other in clearance fit with the guide wire rod body. An adjusting handle is connected with the recessed linkage ball or convex linkage ball of the linkage mechanism to control the guide wire head end. The disadvantage of this technology is that the product mechanism is complex, the components are many, and the production process is high. Especially, the recessed linkage ball or convex linkage ball of the control head end linkage mechanism requires high machining precision. If the engagement is problematic, the deformation of the whole guide wire will be large, and even the guide wire will be bent.

[0004] The authorized announcement No. CN204274545U discloses a guide wire with adjustable head end angle, which is composed of guide wire body, adjusting wire and adjusting handle. The adjusting wire is embedded in the guide wire body and extends from the rear end of the guide wire body. The adjusting handle is used to stretch the adjusting wire to adjust the angle of the front end of the guide wire body. The disadvantage of this technology is that the adjusting wire is embedded in the guide wire body. During the bending process, the proximal end of the guide wire may be affected by the adjusting wire and bent, so that the whole guide wire is deformed. The bending effect, bending precision and bending controllability are poor, and the blood vessel may be spasm due to the bending deformation of the guide wire.

[0005] The existing disclosed technology also has the problem that the guide wire body and the handle are fixedly connected and cannot be detached. After the guide wire reaches the specified position, it is not conducive to the exchange of catheter through the guide wire. Utility model content

[0006] In order to solve the above technical problems, the utility model discloses a kind of medical guide wire of control head end bending angle, operator can be accurately adjusted the bending angle of guide wire head end by manual control or assembly control device and handle device outside body after guide wire enters human body, far end adjustable bending section does not affect guide wire body when bending, when assembly control device and handle device are adjusted, adjustment precision is high, the quantization control of guide wire head end bending angle can be realized, in clinical use, the operability of doctor in operation process can be improved, and the method of navigation complex lumen is improved.

[0007] The utility model solves above technical scheme as follows:

[0008] A kind of medical guide wire of control head end bending angle, from far to near in turn for head end, far end elastic component, near end elastic component and push rod, the head end is connected by far end elastic component with the far end of near end elastic component, the near end of near end elastic component is connected with the far end of push rod, the center component is set in the inner cavity of far end elastic component, near end elastic component and push rod, the head end is connected by far end elastic component with the center component far end, the center component near end is stretched out from the near end of push rod.The far end elastic component is guide wire adjustable bending section.

[0009] Further, the push rod includes a push rod first segment, a push rod second segment, a push rod third segment, and a push rod fourth segment connected in order from far to near. The push rod is at least four segments in structure. If the push rod is less than four segments, it will affect the flexibility of the distal end of the guide wire and the supportability of the support rod segment.

[0010] Further, the push rod second segment, the push rod third segment, and the push rod fourth segment have a helical cutting structure on the surface.

[0011] Further, the push rod first segment has a frosted structure on the surface, the push rod second segment has a gradually changing pitch structure, the push rod third segment has an axial variable diameter structure, the outer diameter of the distal end of the push rod third segment is smaller than that of the near end, and the outer diameter of the push rod fourth segment is smaller than that of the push rod first segment, the push rod second segment, or the push rod third segment. The gradually changing pitch structure is adopted to better control the torsion and operability, and the force applied by the near end is better transmitted to the distal end, while the flexibility of the guide wire closer to the head end is better.

[0012] Further, the distal end of the push rod is connected to a control device and a handle device, and the center component penetrates the control device and is connected to the handle device. The control device and the handle device are connected by a near end threaded knob. The control device and the handle device control the center component to accurately adjust the angle of the distal end of the guide wire.

[0013] Further, the handle device is provided with a clamping head device axially arranged therein, the clamping head device is in a clamping structure, the distal end of the clamping head device is an open end, the distal end of the clamping head device is clamped and connected with the center member end round head at the proximal end of the center member, and the proximal end of the clamping head device is a pressing spring part; the surface of the handle device is provided with a control button, and the control button is connected with the pressing spring part at the proximal end of the clamping head device through a pressing rod arranged at the bottom. The control button can be pressed to achieve the disassembly and assembly of the guide wire.

[0014] Further, the handle device is provided with a clamping head device axially arranged therein, the clamping head device is in a clamping structure, the distal end of the clamping head device is an open end, the distal end of the clamping head device is clamped and connected with the center member end round head at the proximal end of the center member, and the proximal end of the clamping head device is a pressing spring part; the surface of the handle device is provided with a control button, and the control button is connected with the pressing spring part at the proximal end of the clamping head device through a pressing rod arranged at the bottom. The control button can be pressed to achieve the disassembly and assembly of the guide wire.

[0015] Further, the diameter of the center member end round head is greater than the inner diameter of the push rod and less than the outer diameter of the push rod.

[0016] Further, the control device is radially provided with a distal end threaded knob and a proximal end threaded knob, the distal end threaded knob is radially provided with a rubber ring, and the center member is arranged through the distal end threaded knob, the rubber ring and the proximal end threaded knob. The rubber ring inside the control device can be rotated and tightened to control the direction of the push rod. The combination of the distal end threaded knob and the rubber ring is equivalent to a guide wire twist controller. It is used to assist in controlling the twist direction of the push rod. The proximal end of the first section of the push rod can pass through the hole diameter of the rubber ring. By tightening the distal end threaded knob, the center hole diameter of the rubber ring is deformed to press the push rod, so that the push rod and the handle form a coaxial structure, and the twist direction of the push rod is adjusted through the distal end threaded knob.

[0017] Further, the center member is in a wire-like axial variable diameter structure, and the outer diameter of the distal end of the center member is less than the outer diameter of the proximal end. It can prevent the center member from entering the inner cavity of the push rod. The wire-like structure of the center member makes its size smaller, which can make the outer diameter of the guide wire smaller, which is beneficial to pass through the small lumen. The variable diameter structure of the center member can improve the force transmission of the whole guide wire and the flexibility of the distal end, and improve the passability of the guide wire in the tortuous blood vessels.

[0018] Further, the distal end elastic part is visible under X-ray.

[0019] Further, the push rod is made of metal material, and the push rod can be made of 304 stainless steel material, nickel-titanium alloy material, etc.

[0020] Further, the push rod is provided with a center member in the inner cavity, the center member extends from the handle device to the distal end of the guide wire rod body and the guide wire head end, and is connected with the head end.

[0021] Further, the central member is made of alloy material, such as stainless steel.

[0022] Further, the head end, the distal end elastic component, the proximal end elastic component and the pushing rod are provided with a coating or a sheath.

[0023] Further, the scale sliding rail groove can control the bending angle precision of the guide wire head end.

[0024] Further, the control button is located on the pressing groove on the surface of the handle device, and the pressing control button can make it completely enter the pressing groove, so that the pressing rod can give the contraction force to the pressing spring component, the chuck device of the control central member is opened, and the handle can be assembled and disassembled.

[0025] Further, the pressing spring component is made of metal alloy material, such as stainless steel.

[0026] Compared with the prior art, the utility model has the advantages that the bending angle of the guide wire head end can be accurately adjusted through manual control or assembly control device and handle device, the scale sliding rail groove on the handle device realizes the quantitative control of the bending angle of the head end controllable bending guide wire, and the head end angle can be adjusted, the adjustment angle is accurately controllable, the product structure is simple and easy to process, the handle can be randomly disassembled and assembled, the bending angle is adjustable, the bending angle is accurate, the bending is controllable, the application scene is multiple, and the bending position does not affect the guide wire body. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below.

[0028] Figure 1 It is a whole structure schematic view of the medical guide wire for controlling the bending angle of the head end without the control device and the handle device (in the flat state when manually operated).

[0029] Figure 2 It is a whole structure schematic view of the medical guide wire for controlling the bending angle of the head end without the control device and the handle device (in the bending state when manually operated).

[0030] Figure 3 It is a whole structure schematic view of the medical guide wire for controlling the bending angle of the head end with the assembly control device and the handle device in the bending state.

[0031] Figure 4The utility model relates to a medical guide wire of control head end bending angle, push rod whole structure drawing,

[0032] Figure 5 The utility model relates to a medical guide wire of control head end bending angle, control device and handle device structure schematic view,

[0033] Figure 6 The utility model relates to a medical guide wire of control head end bending angle, control device and handle device internal structure detail view,

[0034] In the drawing: 1, head end, 2, far end elastic part, 3, center member, 4, near end elastic part, 5, sheath or coating, 6, push rod, 7, end round head, 8, control device, 9, handle device, 10, slide rail groove with scale, 11, press control button, 12, push rod first section, 13, push rod second section, 14, near end third section, 15, push rod fourth section, 16, far end screw knob, 17, rubber ring, 18, near end screw knob, 19, press groove, 20, press rod, 21, press spring part, 22, chuck device. DETAILED DESCRIPTION

[0035] In order to make the technician in the technical field better understand the technical scheme of the utility model, the following will be combined with the specific embodiment of manual control and assembly control device and handle device accurate adjustment guide wire head end bending angle to be explained in detail: EMBODIMENT

[0036] The specific embodiment of manual control guide wire head end bending angle is as follows:

[0037] Please refer to Figure 1 The best embodiment of manual control guide wire head end bending angle of the utility model, a medical guide wire of control head end bending angle, its basic component includes head end 1, far end elastic part 2, center member 3, near end elastic part 4, sheath or coating 5, push rod 6. EMBODIMENT

[0038] Please refer to Figure 1 Far end elastic part 2 is located in the middle of head end 1 and near end elastic part 4, and near end elastic part 4 is adjacent to push rod 6. Center member 3 is located in the inside of far end elastic part 2, near end elastic part 4 and push rod 6, is connected with head end 1 at the far end, and end round head 7 of the center member is outside the near end port of push rod 6. EMBODIMENT

[0039] Please refer to Figure 4, the push rod 6 is a segmented structure, preferably a four-segment structure, the push rod first segment 12 is a frosted surface, the push rod second segment 13 is provided with a spiral cutting structure, the pitch of the spiral cutting structure gradually changes to make the distal end more flexible, the push rod third segment 14 is a variable diameter structure, and the push rod fourth segment 15 is a segment with the smallest overall diameter of the push rod, and the push rod third segment 14 and the push rod fourth segment 15 are also provided with a spiral cutting structure. Embodiment

[0040] The utility model discloses a medical guide wire of control head end bending angle, and the working procedure of manual control guide wire head end bending angle is:

[0041] Step 1, when the center member end round head 7 is at the proximal end of the push rod 6, the guide wire is in a straight state.

[0042] Step 2: when conveying the guide wire, one hand controls the push rod first segment 12, and the other hand controls the center member end round head 7.

[0043] Step 3: the tortuous blood vessel part passes through left and right rotation push rod first segment 12, and cooperates with the pulling center member end round head 7 to adjust the bending angle of the guide wire in the blood vessel, as shown in the figure, so that the guide wire reaches the designated position. Figure 2 The left and right rotation of the push rod first segment 12 is to control the torsion direction of the whole guide wire, and the pulling of the center member end round head 7 is to realize the bending of the guide wire head end by controlling the center control wire connected with the guide wire head end, so as to realize the bending angle of the guide wire in the blood vessel. Embodiment

[0044] The specific embodiment that the assembly control device and the handle device accurately adjust the bending angle of the guide wire head end is as follows:

[0045] Please refer to Figure 3 , the best embodiment of the utility model assembly control device and handle device accurately adjust the bending angle of the guide wire head end, a medical guide wire of control head end bending angle, the basic components thereof include a head end 1, a distal end elastic component 2, a center member 3, a proximal end elastic component 4, a sheath or coating 5, a push rod 6, a control device 8 and a handle device 9.

[0046] Please refer to Figure 3 , the handle device 9 is provided with a slide rail groove 10 with a scale and a control button 11.

[0047] Please refer to Figure 5 , the control device 8 and the handle device 9 are connected together through a proximal end threaded knob 18, and are connected with the center member 3 and the push rod 6, and the control device 8 is located between the push rod 6 and the handle device 9.

[0048] Please refer to Figure 5, control device 8 is provided with a distal threaded knob 16 and a rubber ring 17, the push rod 6 and the center member 3 pass through the distal threaded knob 16, the rubber ring 17 and the proximal threaded knob 18 respectively, and the tightness of the rubber ring 17 to the push rod 6 is controlled by adjusting the distal threaded knob 16. Wherein, the threaded length of the proximal threaded knob 18 is longer than that of the distal threaded knob 16.

[0049] Please refer to Figure 6 The initial position of the control button 11 is defined as the position of the clamp device 22 when the guide wire is straight, and when the control button 11 is in the initial position, the control button 11 can be pressed downward into the pressing groove 19, at this time the pressing rod 20 transmits downward force to the pressing spring part 21, and the clamp device 22 is expanded under force, releasing the end round head 7 of the center member, at this time the handle device 9 can be disassembled. Embodiment

[0050] When the handle device 9 is not connected, the overall torsion angle of the guide wire is adjusted by controlling the push rod 6 by hand, and the hand can only feel the force, but cannot accurately control; when the handle device 9 is connected, the control device 8 is used for control, the control device 8 uses the principle similar to the guide wire torsion device to control the guide wire push rod, and the handle device 9 can accurately control because the handle device 9 is provided with the scale sliding rail groove 10, which can quantitatively and accurately adjust the displacement of the center member 3, so as to accurately control the bending angle of the guide wire head end. Embodiment

[0051] The working process of the medical guide wire for controlling the bending angle of the head end is accurately adjusted by assembling the control device and the handle device, which comprises the following steps:

[0052] Step 1, the control button 10 is in the initial position, and the guide wire is in the straight state;

[0053] Step 2: tighten the thread of the distal threaded knob 16, and after tightening the thread of the proximal threaded knob 18, loosen it in the reverse direction for two turns, so as to adjust the control device 8 clockwise and counterclockwise at will;

[0054] Step 3: when conveying the guide wire, one hand adjusts the scale of the control button 11 on the scale sliding rail groove 10 of the handle device 9, and the other hand can cooperate with the adjustment of the control device 8 to accurately control the bending angle and bending direction of the guide wire head end;

[0055] Step 4: the tortuous blood vessel part can repeat the operation of step 3, so that the guide wire reaches the specified position;

[0056] Step 5: after the guide wire is in place, slide the control button 11 to the initial position, press the control button 11 into the pressing groove 19, the chuck device 22 is expanded under the force, the end of the center member is released The round head 7, at this time, the screw of the distal end threaded knob 16 is loosened, so that the handle can be detached.

[0057] In summary, the utility model discloses a kind of medical guide wire of control head end bending angle can be accurately adjusted bending angle of guide wire head end by manual control or assembly control device 8 and handle device 9, bending angle adjustment precision is controlled by the scale slide rail groove on detachable handle device 9, the smaller the scale range, the higher the adjustment precision, the quantization control of head end 1 controllable bending guide wire bending angle is realized, bending is directly formed in real time in blood vessel, without removing instrument from patient, cooperate control device 8 and handle device 9 more can realize the quantization control of guide wire head end 1 bending angle, can improve the operability of doctor in operation process in clinical use, improve the method of navigation complex lumen.

[0058] Those skilled in the art of the present technology should recognize that the above embodiments are only used to illustrate the present utility model, and are not used as a limitation on the present utility model, as long as the above described embodiments are changed and modified within the essential spirit of the present utility model, the changes and modifications will fall within the scope of the claims of the present utility model.

Claims

1. A medical guide wire for controlling a bending angle of a tip end, comprising, in order from a distal end to a proximal end, a tip end (1), a distal elastic member (2), a central member (3), a proximal elastic member (4), and a push rod (6), characterized in that, The head end (1) is connected with the distal end elastic component (2) and the proximal end elastic component (4), the proximal end of the proximal end elastic component (4) is connected with the push rod (6), the center component (3) is arranged in the inner cavity of the distal end elastic component (2), the proximal end elastic component (4) and the push rod (6), the distal end of the center component (3) is connected with the head end (1) through the distal end elastic component (2), and the proximal end of the center component (3) extends out of the proximal end of the push rod (6); the distal end of the push rod (6) is communicated with the control device (8) and the handle device (9), the center component (3) penetrates the control device (8) and is connected with the handle device (9); the handle device (9) is provided with a chuck device (22) in the axial direction, the chuck device (22) is in the shape of a clamp, the distal end of the chuck device (22) is an open end, the distal end of the chuck device (22) is clamped and connected with the center component end round head (7) of the proximal end of the center component (3), and the proximal end of the chuck device (22) is a pressing spring component (21); the surface of the handle device (9) is provided with a control button (11), and the control button (11) is connected with the pressing spring component (21) of the proximal end of the chuck device (22) through the pressing rod (20) arranged at the bottom.

2. The medical guide wire for controlling the angle of a tip bend according to claim 1, wherein The push rod (6) comprises a push rod first segment (12), a push rod second segment (13), a push rod third segment (14) and a push rod fourth segment (15) connected in sequence from the distal end to the proximal end.

3. The medical guide wire for controlling the angle of a tip bend according to claim 2, wherein The surfaces of the push rod second segment (13), the push rod third segment (14) and the push rod fourth segment (15) are helical cutting structures.

4. The medical guide wire for controlling the angle of a tip bend according to claim 3, wherein The surface of the push rod first segment (12) is a frosted structure, the push rod second segment (13) is a pitch gradient structure, the push rod third segment (14) is an axial variable diameter structure, the outer diameter of the distal end of the push rod third segment (14) is smaller than that of the proximal end, and the outer diameter of the push rod fourth segment (15) is smaller than that of the push rod first segment (12), the push rod second segment (13) or the push rod third segment (14).

5. The medical guide wire for controlling the angle of a tip bend according to claim 1, wherein The handle device (9) is radially provided with a slide rail groove (10) with a scale and the control button (11).

6. The medical guide wire for controlling the angle of a tip bend according to claim 1, wherein The diameter of the center component end round head (7) is greater than the inner diameter of the push rod (6) and smaller than the outer diameter of the push rod (6).

7. The medical guide wire for controlling the angle of a tip bend according to claim 5, wherein The control device (8) is radially provided with a distal end threaded knob (16) and a proximal end threaded knob (18), the distal end threaded knob (16) is radially provided with a rubber ring (17), and the center component (3) penetrates the distal end threaded knob (16), the rubber ring (17) and the proximal end threaded knob (18).

8. The medical guide wire for controlling the angle of a tip bend according to claim 1, wherein The center component (3) is a filamentous axial variable diameter structure, and the outer diameter of the distal end of the center component (3) is smaller than that of the proximal end.

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