A guide wire

Abstract

The present invention discloses a guide wire, which includes a probing section and a abutting section. The abutting section has a pre-shaped curled state and an expanded state for passing through blood vessels. In the present invention, through the pre-shaped thrust buffer section and the abutting section, after the abutting section is bent, the probing section is no longer in its tangential position but points to the middle area of the abutting section, increasing the force-bearing area for the guide wire thrust at the bottom of the left ventricle and avoiding the safety hazard of puncturing the left ventricular wall.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a guide wire for pre-establishing a channel and guiding the delivery of instruments during interventional surgery. Background Art

[0002] Interventional surgery causes less trauma and invasiveness to the human body, and is a medical technology that has rapidly emerged and been popularized in recent years. Usually, a dedicated delivery system is required to deliver diagnostic and treatment instruments, implantable instruments, etc. to the lesion site.

[0003] Generally, the delivery system mainly includes a sheath, a sheath core located inside the sheath, and an operating handle. Along the direction away from the operator, the sheath core generally includes a core tube, a stent fixing head, a mounting section, and a guiding head connected in sequence. When implanting a valve, first, the stent covered with an artificial valve is clamped to the stent fixing head through a locking member at the tail, and the sheath is sleeved outside the sheath core to keep the stent in a compressed state.

[0004] See Figure 1 , existing guide wires are mostly linearly extending elastic metal wires, which are straight or slightly curved when stretched forcefully to facilitate threading into blood vessels and then released and deployed in the body.

[0005] Taking the interventional aortic valve replacement surgery as an example, a thinner guide wire 1 is first penetrated through the femoral artery or femoral vein. The front end of the guide wire 1 enters the left ventricle 2 after passing through the aortic valve, and the front end of the guide wire 1 is locally curled at the bottom of the left ventricle to form a support. Then, the sheath 5 loaded with the valve is sent along the guide wire 1 until it reaches the aortic valve 3, and then the sheath 5 is withdrawn to release the stent 4, and the stent 4 expands under the action of body temperature.

[0006] After the linearly extending guide wire penetrates into the left ventricle, the top is a penetrating section extending substantially linearly downward, and the bottom is a abutting section. The abutting section gradually curls under the action of the left ventricular side wall and bottom, but there will still be a Figure 1 relatively large pressure is generated in the A area of, and since this area is relatively concentrated and the pressure is large, there is a risk of puncturing the left ventricular wall. Summary of the Invention

[0007] In view of the risk of the guide wire puncturing the ventricular wall in the prior art, the present invention provides a guide wire with a pre-shaped structure, which disperses the stress concentration area and reduces the risk of puncturing the left ventricular wall.

[0008] A guide wire includes a penetrating section and an abutting section. The abutting section has a pre-shaped curled state and an expanded state when passing through blood vessels.

[0009] The abutment segment in the curled state of the present invention can increase the contact area with the bottom of the left ventricle and avoid the risk of puncturing the left ventricular wall. Since the bottom of the left ventricle has a larger space relative to the blood vessels, the abutment segment in the curled state should fit the left ventricle as closely as possible, which requires a larger size. A larger size is difficult to pass through the blood vessels, so the abutment segment has an expanded state for passing through the blood vessels.

[0010] The probe section is directly connected to the abutment section or is connected to the abutment section through a predetermined thrust buffer section. Preferably, the probe section is connected to the abutment section through a predetermined thrust buffer section.

[0011] The present invention adds a thrust buffer section at the connection position between the insertion section and the abutment section, changing the structure in the prior art in which the insertion section directly extends and is conformably connected to the abutment section. This can improve the operator's feel during surgery. Even if the thrust of the insertion section is too large, it can still be absorbed by the deformation of the thrust buffer section to alleviate the problem of local pressure concentration.

[0012] Preferably, along the direction perpendicular to the probing section, the width of the abutting section in the pre-formed curled state is 1.5 to 5 cm.

[0013] The width of the abutment section refers to the dimension of the widest part in the direction perpendicular to the insertion section, which is roughly the diameter of the outermost circle of the curled structure.

[0014] As a further preference, along the direction perpendicular to the insertion section, the width of the abutment section is 2 to 3.5 cm.

[0015] Since the guide wire abuts against the left ventricle through the abutment section after entering the left ventricle, it is preferred that the axis around which the abutment section is curled is perpendicular to the extension direction of the insertion section.

[0016] In order to avoid the risk of puncture caused by the end of the guide wire, preferably, the end of the guide wire is curled and enveloped by the abutment segment.

[0017] As a further preference, the distal end of the guide wire is adjacent to the axis about which the abutment segment is curled.

[0018] Preferably, when the probing section pushes against the abutting section, the thrust buffer section has a deformation along the thrust direction.

[0019] The probing section pushes against the abutting section, that is, the probing section extends further toward the bottom of the left ventricle, and the thrust buffer section

[0020] The push-up of the probe section and the reaction force of the abutment section cause deformation, thereby achieving the purpose of "buffering".

[0021] Preferably, relative to the respective extension trends of the probing section and the abutting section, the thrust buffer section has an extension trend different from both of them.

[0022] Between different extension trends, there can be a smooth transition or an obvious turning point. The extension trends can be, for example, along a straight line, an arc line, a wavy line or a spiral line, etc., or other complex structures. However, in terms of the overall structural characteristics, extension direction or bending angle, etc., the thrust buffer section has changes compared with the penetration section and the abutting section, which is convenient for transferring the force direction through its deformation and improving the pushing feel.

[0023] Optionally, the thrust buffer section is a two-dimensional structure or a three-dimensional structure.

[0024] Optionally, the thrust buffer section is an arc structure, a wave structure or a winding structure.

[0025] The wave structure can be a simple S shape or have multiple repeating cycles. Each cycle does not strictly require the same, and there can also be slight changes in shape. The winding structure can be a spiral shape with each turn nested in sequence, or each turn can be gradually staggered and not included in each other, but there can be overlapping parts. The winding directions of each turn can be the same or different. All kinds of structural types can be either two-dimensional structures or three-dimensional structures.

[0026] Optionally, the extension line of the penetration section deviates from the tangent position of the abutting section or is at the tangent position of the abutting section.

[0027] Preferably, starting from the end of the penetration section, the thrust buffer section as a whole has a circumferential extension direction opposite to that of the abutting section. The thrust buffer section is arc-shaped, and the corresponding central angle is 10 to 450 degrees.

[0028] As a further preference, the central angle corresponding to the thrust buffer section is 10 to 90 degrees.

[0029] Preferably, the extension line of the penetration section deviates from the tangent position of the abutting section.

[0030] As a further preference, the extension line of the penetration section points to the middle of the abutting section.

[0031] Through the pre-shaped thrust buffer section and the abutting section of the present invention, after the abutting section is bent, the penetration section is no longer in its tangent position, but points to the middle area of the abutting section, increasing the force-bearing area of the bottom of the left ventricle to bear the guide wire thrust and avoiding the safety hazard of puncturing the left ventricular wall.

[0032] Optionally, starting from the end of the penetration section, the thrust buffer section as a whole has the same circumferential extension direction as that of the abutting section.

[0033] The same circumferential extension direction can be understood as bending and extending from the abutting section in the clockwise direction to form the thrust buffer section, and then still curling the abutting section in the clockwise direction, and vice versa.

[0034] Since the thrust buffer section has different extension trends, when the circumferential extension directions are the same, the arcs of the thrust buffer section and the abutting section should vary, i.e., they extend with different arcs. It is also possible that the thrust buffer section has other deformations while extending circumferentially.

[0035] Preferably, the thrust buffer section is arc-shaped, and the corresponding central angle is 10 to 360 degrees.

[0036] The central angle corresponding to the thrust buffer section refers to the central angle formed by the starting and ending arcs of the arc.

[0037] More preferably, the central angle corresponding to the thrust buffer section is 270 to 360 degrees.

[0038] Preferably, starting from the end of the probing section, the thrust buffer section as a whole has a circumferential extension direction opposite to that of the abutting section.

[0039] The opposite circumferential extension direction can be understood as bending and extending clockwise from the abutting section to form the thrust buffer section, and then curling the abutting section counterclockwise. Vice versa, bending and extending counterclockwise from the abutting section to form the thrust buffer section, and then curling the abutting section clockwise.

[0040] Therefore, the "reverse" in the thrust buffer section refers to the opposite circumferential direction with respect to the curling direction of the abutting section.

[0041] For the convenience of smoothly penetrating into the body, preferably, the thrust buffer section is arc-shaped.

[0042] If other shapes are adopted, the circumferential extension direction should be understood as the general trend and orientation of the bending.

[0043] Preferably, the central angle corresponding to the thrust buffer section is 10 to 450 degrees.

[0044] More preferably, the central angle corresponding to the thrust buffer section is 30 to 180 degrees.

[0045] More preferably, the central angle corresponding to the thrust buffer section is 60 to 150 degrees.

[0046] More preferably, the central angle corresponding to the thrust buffer section is 70 to 120 degrees.

[0047] More preferably, the central angle corresponding to the thrust buffer section is 10 to 90 degrees.

[0048] More preferably, the central angle corresponding to the thrust buffer section is 90 degrees.

[0049] If the central angle is too small, the penetration section will deviate from the tangent position of the abutment section insignificantly. If the central angle is too large, unnecessary excessive detours will be introduced, increasing the difficulty of penetrating into the body and reducing the compliance.

[0050] Preferably, the thrust buffer section is in an S shape.

[0051] Preferably, the thrust buffer section is in a spiral shape.

[0052] More preferably, the spiral shape includes at least one layer of spiral coils, and the spiral shape is a left-handed spiral or right-handed spiral structure.

[0053] More preferably, the axis around which the thrust buffer section is curled is coaxial or parallel to the extending direction of the penetration section.

[0054] To ensure the contact area or length between the abutment section and the bottom of the left ventricle, preferably, starting from the extending direction of the abutment section being the same as that of the penetration section, the central angle corresponding to the continuously curled part is greater than or equal to 180 degrees.

[0055] More preferably, the central angle corresponding to the continuously curled part is greater than or equal to 270 degrees.

[0056] Sufficient curling can prevent the end of the continuously curled part from touching the inner wall of the left ventricle under pressure and causing damage.

[0057] Optionally, the abutment section is in the same plane. That is, the abutment section extends along a smooth curve in a plane.

[0058] To ensure the contact area or length between the abutment section and the left ventricle to achieve a better support effect, at least a part of the abutment section is a three-dimensional structure with linear extension.

[0059] Linear extension ensures that it is a straight line or slightly curved when stretched, and can penetrate into the body directly without relying on a restraint device, while the three-dimensional structure can obtain better support.

[0060] Preferably, the guide wire of the present invention is a linear extension structure as a whole.

[0061] Preferably, at least a part of the abutment section has a fluctuating wave structure relative to the plane determined by the arc while extending along an arc path.

[0062] The arc path has a determined plane. When viewed horizontally along the plane, the arc path is a straight line, while the fluctuating wave structure is a curve when viewed horizontally along the plane, that is, it forms a three-dimensional structure by breaking away from the two-dimensional plane, or it can be understood as swinging left and right while extending along the arc path.

[0063] Preferably, at least a portion of the abutting section has a spiral winding structure while extending along the arc path, that is, a winding structure with the arc path as an axis.

[0064] Similar to the prior art, the end of the abutting section is provided with a guiding section. The guiding section is slightly soft in terms of material and is convenient for guiding the insertion into the blood vessel.

[0065] Optionally, a guide section is connected to the end of the abutting section.

[0066] In order to facilitate threading and improve compliance, in the prior art, the guiding section is a relatively soft section, and the remaining parts are relatively hard sections. The softness and hardness here refer to the mechanical properties of the material, which are relative and do not strictly limit the rigidity value. A gradient section can also be set between the softer section and the harder section, that is, a gradual process from hard to soft, not a sudden change. As for the guide wire itself, it can be a single metal wire, or a multi-strand composite or a structure with a core wire and a spiral outer wire. These are not the focus of improvement of the present invention and can be implemented according to the prior art.

[0067] Since the abutment segment in the present invention needs to withstand the pushing force transmitted from the proximal end, in terms of material, the part that abuts against the left ventricle should at least be in a harder section. From the perspective of actual application scenarios, taking the insertion section side as the upper side, the lower part of the abutment segment should be a harder section.

[0068] As the abutment segment continues to extend and coil upward, it no longer bears the downward thrust of the probing segment, so its material rigidity and coiling method are no longer strictly limited, and even its circumferential coiling direction can be changed. Therefore, in the case where the thrust buffer segment and the abutment segment mentioned in the present invention have opposite circumferential extension directions, the abutment segment should be understood as the portion in contact with the bottom of the left ventricle or the portion adjacent to the thrust buffer segment, and can also be understood as the overall curling trend, and should not be limited to local subtle changes.

[0069] The pre-shaping can utilize existing metal heat treatment methods, etc., so that the guide wire can maintain a specific shape without being affected by external forces.

[0070] Preferably, the guide wire is also provided with a pre-shaped guide bend for changing the direction of the insertion section.

[0071] The guide bend is adjacent to the ascending aorta when in use.

[0072] When the guide wire is inserted into the left ventricle, it is generally blocked by the blood vessel wall at the ascending aorta and turned. Due to the elasticity of the guide wire itself, its further downward extension path will stick to the blood vessel wall, that is, it will deviate from the center position of the aortic valve, which is not conducive to smooth insertion and is also prone to cause contusion. The guide wire of the present invention changes the direction of the insertion section by setting a guiding bend, and is directed as much as possible toward the center position of the aortic valve to smoothly guide it into the left ventricle.

[0073] As a further preference, the circumferential extension direction of the guiding bend is the same as or opposite to that of the curling part of the abutting section.

[0074] As a further preference, the included angle of the guiding bend part is 90 to 150 degrees.

[0075] The guide wire of the present invention combines a specific shape in a pre-shaped manner, disperses the stress concentration area of the abutment after penetrating into the left ventricle, reduces the risk of puncturing the left ventricular wall, and can also improve the operating feel and reduce the operating difficulty through the setting of the thrust buffer section. Description of the Drawings

[0076] Figure 1 It is a schematic diagram of the guide wire in the left ventricle during an existing interventional operation;

[0077] Figure 2a It is a schematic structural diagram of the guide wire of the present invention;

[0078] Figure 2b It is Figure 2a a schematic diagram of the position of the guide wire in the left ventricle in

[0079] Figure 3a It is a schematic structural diagram of the guide wire of the present invention;

[0080] Figure 3b It is Figure 3a a schematic diagram of the position of the guide wire in the left ventricle in

[0081] Figure 4a It is Figure 3a a schematic diagram of the size of the guide wire in

[0082] Figure 4b It is Figure 4a an enlarged view of part A in

[0083] Figure 5 It is a schematic structural diagram of another embodiment of the guide wire of the present invention;

[0084] Figure 6 It is Figure 3a a C-C cross-sectional view in

[0085] Figure 7 It is relative to Figure 6 a schematic diagram of another embodiment;

[0086] Figure 8 It is relative to Figure 6 a schematic diagram of the third embodiment;

[0087] Figure 9 It is Figure 3a a schematic diagram of the deformed guide wire in

[0088] Figure 10 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0089] Figure 11 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0090] Figure 12a is Figure 11 Schematic diagram of the deformed guide wire in

[0091] Figure 12b is Figure 12a Enlarged view of part A in

[0092] Figure 12c is Figure 12a Schematic diagram of the angle of the thrust buffer section in

[0093] Figure 13 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0094] Figure 14 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0095] Figure 15 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0096] Figure 16 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0097] Figure 17 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0098] Figure 18 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0099] Figure 19 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0100] Figure 20 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0101] Figure 21 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0102] Figure 22 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0103] Figure 23 Schematic structural diagram of another embodiment of the guide wire of the present invention;

[0104] Figure 24 Schematic structural diagram of the guide wire of the present invention wound and packed. Detailed implementation mode

[0105] Refer to Figure 2a and Figure 2b , in this embodiment, taking a guide wire applied in transcatheter aortic valve replacement surgery as an example, the front end of the guide wire 1 enters the left ventricle 2 after passing through the aortic valve, and the front end of the guide wire 1 is partially curled at the bottom of the left ventricle to form a support. Then, the sheath tube 5 loaded with the valve is sent along the guide wire 1 until it reaches the aortic valve 3, and then the sheath tube 5 is withdrawn to release the stent 4 with the valve.

[0106] The guide wire 1 is at least pre-shaped at the front end, that is, the end extending into the left ventricle. The front end part includes a probing section 6. The probing section 6 itself may not be specially pre-shaped. According to the prior art, it generally extends along a straight line or with a slight curvature and has elasticity. This can also be understood as the result of its pre-shaping that it extends along a straight line or with a slight curvature.

[0107] The rear end of the probing section (not shown in the figure), that is, the part connected to the upper part of the probing section 6, adopts the shape and material of the guide wire in the prior art. For example, it can adopt the same shape and material as the probing section 6, or adopt a material slightly harder than the probing section 6.

[0108] Below the probing section 6 is the directly connected abutting section 7. The abutting section 7 has a pre-shaped curled state and an expanded state for passing through blood vessels; the end of the abutting section 7 is a softer guiding section 9.

[0109] The probing section 6 is basically at the tangent part of the abutting section 7. The abutting section 7 curls around the axis perpendicular to the probing section 6 and gradually envelopes the guiding section 9 at the end. The end of the abutting section 7 is adjacent to the curled axis part.

[0110] Due to the relatively large outer diameter of the pre-shaped state of the abutting section 7, it cannot directly pass through blood vessels. Therefore, when passing through blood vessels, the curled part is expanded. Although it may not be in a standard straight line, it can at least pass through blood vessels.

[0111] After the abutting section 7 enters the left ventricle, it loses the restraint of the blood vessel wall and will return to the pre-shaped state. Its curled part contacts the side wall and bottom of the left ventricle. See the B area in Figure 2b , relative to Figure 1 , its contact and stress area are significantly increased, and the local pressure is dispersed, reducing the risk of puncturing the left ventricular wall.

[0112] Refer to Figure 3a and Figure 3b , in another embodiment, the probing section 6 is connected to the abutting section 7 through a pre-shaped thrust buffer section 8. The abutting section 7 has a pre-shaped curled state, and the end of the abutting section 7 is a softer guiding section 9.

[0113] Starting from the bottom end of the probing section 6, the thrust buffer section 8 is in an arc shape, which extends a certain angle in the clockwise direction, and then the abutting section 7 connected thereto extends and curls in the opposite circumferential direction, that is, the counterclockwise direction.

[0114] After the abutting section 7 is pre-twisted by the thrust buffer section 8, the probing section 6 is no longer in the tangential position of the abutting section 7, but points to the middle area of the abutting section 7, increasing the force-bearing area for the guide wire thrust at the bottom of the left ventricle. When the probing section 6 is pushed, the pressure at the bottom of the left ventricle is dispersed over a larger area of region C, reducing the pressure and avoiding the safety hazard of puncturing the left ventricular wall.

[0115] From the overall shape, the extending trend of the probing section 6 is linear extension, the extending trend of the abutting section 7 is spiral winding, and the extending trend of the thrust buffer section 8 is an arc with a smaller radius of curvature. Therefore, the thrust buffer section 8 has an extending trend or shape characteristic different from the other two.

[0116] The thrust buffer section 8 can adopt a two-dimensional or three-dimensional structure as needed.

[0117] For easy and smooth penetration into the body, the thrust buffer section 8 adopts an arc shape or a smooth curve. If other structures such as broken lines are adopted, the clockwise circumferential extension direction should be understood as the general trend and orientation of the bend.

[0118] To ensure the contact area or length between the abutting section 7 and the bottom of the left ventricle, the abutting section 7 extends to point X1, and its extending orientation is downward, consistent with the extending orientation of the probing section 6. The central angle corresponding to the part where the abutting section 7 continues to curl from point X1 is greater than or equal to 180 degrees. In the figure, it extends at least to point X2, that is, it extends 360 degrees in a circle.

[0119] See Figure 4a As shown in the figure, along the direction perpendicular to the probing section 6, the width L of the abutting section 7 is 1.5 - 5 cm, preferably 2 - 3.5 cm. Along the extending direction of the probing section 6, the height H of the abutting section 7 is 1.5 - 5 cm, preferably 2 - 3.5 cm.

[0120] See Figure 4b As shown in the figure, the central angle W corresponding to the thrust buffer section 8 is 30 - 180 degrees. If the central angle is too small, the deviation of the probing section from the tangential position of the abutting section will not be obvious. If the central angle is too large, an S shape will be formed at the connection part, introducing unnecessary excessive detours and increasing the difficulty of penetrating into the body and reducing the compliance. In this embodiment, the central angle W is approximately 90 degrees. In the figure, the probing section 6 extends downward to the end point W1, turns 90 degrees through the thrust buffer section 8 to the end point W2, and points to the left, and then continues to wind and extend through the abutting section 7.

[0121] See Figure 5, in another embodiment, the abutting section 7 extends from point X1 in the same extending direction as the probing section, that is, extends downward. After passing point X1 until it continues to curl to point X2, the corresponding central angle is approximately 180 degrees. Sufficient curling can prevent the end of the continuously curled part from contacting the inner wall of the left ventricle under pressure and causing damage.

[0122] Figure 3a In, the part from point Y1 to point Y2 is the main load-bearing part that abuts against the left ventricle. When the abutting section 7 is in the same plane, see Figure 6 , the part from point Y1 to point Y2 extending along the arc is a straight line.

[0123] See Figure 7 , in another embodiment, at least a part of the abutting section 7, that is, the part between point Y1 and point Y2 or a larger area, while extending along an arc path, also has a undulating wave structure relative to the plane determined by the arc, that is, a three-dimensional structure is adopted, which can further improve the stability of the support and increase the contact area.

[0124] See Figure 8 , in another embodiment, at least a part of the abutting section 7, that is, the part between point Y1 and point Y2 or a larger area, while extending along an arc path, has a spiral winding structure. That is, a three-dimensional structure with winding along the arc path as the axis can further improve the stability of the support and increase the contact area.

[0125] See Figure 9 , relative to Figure 4, when the probing section 6 is further pushed downward, it causes the thrust buffer section 8 to deform. Figure 9 In, the bending degree of the thrust buffer section 8 increases, pulling down the top part of the abutting section 7. The pre-shaped abutting section 7 is used to disperse the pressure to a larger area at the bottom of the abutting section 7 to avoid over-concentration of stress. The deformation buffer of the thrust buffer section 8 will also further improve the operation feel and reduce the operation difficulty.

[0126] See Figure 10 , in another embodiment, the thrust buffer section 8 adopts a relatively complex curve structure. In the figure, the probing section 6 extends downward, turns through an S bend via the thrust buffer section 8, and then bends downward through the abutting section 7 and continues to wind and extend.

[0127] See Figure 11 , in another embodiment, the probing section 6 is basically still in the tangent position of the abutting section 7. The thrust buffer section 8 turns counterclockwise upward from the starting point 8a until the end point 8b, and then changes the curvature and starts to wind counterclockwise to form the abutting section 7. In this embodiment, the thrust buffer section 8 and the abutting section 7 have the same circumferential direction, that is, both are counterclockwise.

[0128] See Figure 12a, when the penetration section 6 is further pushed downward, it causes the thrust buffer section 8 to deform. During the deformation, it also pulls downward the top part of the abutment section 7 via the end point 8b, and uses the pre-shaped abutment section 7 to disperse the pressure to a larger area at the bottom of the abutment section 7, avoiding excessive stress concentration.

[0129] See Figure 12b and Figure 12c , the central angle W corresponding to the thrust buffer section 8 is 270 degrees. In the figure, the penetration section 6 extends downward to the end point W1, turns 270 degrees via the thrust buffer section 8 to the end point W2, and points to the left, and then continues to wind and extend through the abutment section 7.

[0130] See Figure 13 , in another embodiment, the thrust buffer section 8 adopts a three-dimensional spiral structure. When the penetration section 6 is further pushed downward, the thrust buffer section 8 is similar to a spiral spring and can play a good buffering role.

[0131] In another embodiment, the thrust buffer section as a whole has a circumferential extension direction opposite to that of the abutment section. See Figure 14 , the thrust buffer section 8 has a circumferential extension direction opposite to that of the abutment section. The thrust buffer section 8 is arc-shaped, and the corresponding central angle W is about 60 degrees. According to different shape changes of the thrust buffer section 8, the corresponding central angle also changes accordingly, for example, it can be 10 degrees, 180 degrees, 360 degrees, 450 degrees, etc.

[0132] In this embodiment, the abutment section 7 winds approximately two turns, that is, 720 degrees, and the winding axis N (shown as a point in the figure due to the angle problem) is perpendicular to the extension direction of the penetration section 6.

[0133] In another embodiment, starting from the end of the penetration section, the thrust buffer section as a whole can also have the same circumferential extension direction as the abutment section. See Figure 15 , the thrust buffer section 8 winds 360 degrees counterclockwise and then continues to extend downward for a section, and then connects with the abutment section 7. Generally, the penetration section 6 is in the tangent position of the abutment section 7, and the abutment section 7 winds approximately 630 degrees counterclockwise. According to different shape changes of the thrust buffer section 8, the corresponding central angle also changes accordingly, for example, it can be 10 degrees, 180 degrees, etc.

[0134] See Figure 16 , in another embodiment, the abutment section winds counterclockwise, and the thrust buffer section 8 also winds 360 degrees counterclockwise and then continues to extend downward for a section. Relative to Figure 15 , the penetration section 6 deviates from the tangent position of the abutment section 7, and its direction is more away from the center of the abutment section 7.

[0135] See Figure 17 , in another embodiment, the thrust buffer section 8 is a three-dimensional spiral shape, combined with Figure 18and Figure 19 The spiral shape can be wound either clockwise (right-handed) or counterclockwise (left-handed) relative to its own axis while extending downward.

[0136] in Figure 17 is coiled clockwise, and Figure 19 After the winding is completed, the coil is adaptively connected to the abutment section 7 through a transitional turning section 8C.

[0137] The thrust buffer section 8 can be half a circle, one circle or multiple circles when it is spirally wound. In order to facilitate insertion into the body, its turning radius should not be too small, whether it is spirally wound or wound in the same plane. For example, it can be more than 1 / 5 of the radius of the widest part of the abutment section 7.

[0138] See also Figure 20 In another embodiment, the thrust buffer section 8 is in a three-dimensional spiral shape, and the spiral shape includes at least one spiral coil, and the axis M of the spiral shape is slightly offset from the extension line of the probe section 6 but is roughly parallel.

[0139] See also Figure 21 , relative to Figure 20 The thrust buffer section 8 is in a three-dimensional spiral shape, and the axis M thereof is the extension line of the insertion section 6 .

[0140] See also Figure 22 In this embodiment, the guide wire is also provided with a pre-shaped guide bend 10 for changing the direction of the probe section 6. If the probe section 6 of the guide wire is not restrained by an external sheath or the like at the ascending aorta 11, it will be attached to the inner wall of the blood vessel due to the elasticity of the guide wire itself. In this embodiment, in order to change the direction of the probe section 6, the guide bend 10 is provided in a pre-shaped manner, which is adjacent to the ascending aorta in the use state. Through the guide bend 10, the probe section 6 is closer to the middle of the aortic valve 3, and then smoothly probes into the left ventricle 2.

[0141] In this embodiment, the angle W of the guide bend 10 is approximately 120 degrees. According to the extension direction of the guide wire entering the left ventricle 2, the guide bend 10 and the abutment segment 7 are both bent counterclockwise, that is, they have the same circumferential extension direction.

[0142] See also Figure 23 , relative to Figure 22 The difference is that the guide bend 10 is bent clockwise, and the abutment section 7 is bent counterclockwise, that is, the two have opposite circumferential extension directions.

[0143] The distance between the guide bend 10 and the bottom end of the probe section 6 can be changed according to the physiological structure characteristics of the lesion site during surgery, that is, different sizes and specifications can be configured.

[0144] See also Figure 24It is a schematic structural diagram before the guide wire is wound and loaded into the package.

[0145] The guide wire of the present invention combines a specific shape in a predetermined form, disperses the stress concentration area of the abutment after penetrating into the left ventricle, and reduces the risk of puncturing the left ventricular wall.

[0146] The specific embodiments of the present invention disclosed above are only for illustration, but the present invention is not limited thereto. Those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Obviously, these modifications and variations should fall within the protection scope required by the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not impose any special limitation on the present invention.

Claims

1. A guide wire, comprising a probing section and a abutting section, characterized in that, The probing section is connected to the abutting section through a pre-shaped thrust buffer section, and the guide wire is generally a linearly extending structure; The abutting section has a pre-shaped curled state and an expanded state for passing through blood vessels. In the curled state, the abutting section forms a curled part, and the end of the guide wire is curled and enveloped by the abutting section. The pre-twisting of the thrust buffer section causes the extension line of the probing section to deviate from the tangent position of the abutting section and point to the middle area of the curled part to increase the acting area of the guide wire thrust.

2. The guide wire according to claim 1, wherein Along the direction perpendicular to the probing section, the width of the pre-shaped curled state of the abutting section is 1.5 - 5 cm.

3. The guide wire according to claim 2, wherein, Along the direction perpendicular to the probing section, the width of the pre-shaped curled state of the abutting section is 2 - 3.5 cm.

4. The guide wire according to claim 1, characterized in that, The axis around which the abutting section is curled is perpendicular to the extending direction of the probing section.

5. The guide wire according to claim 1, characterized in that, The end of the guide wire is adjacent to the axis around which the abutting section is curled.

6. The guide wire according to claim 1, characterized in that, In the state where the probing section pushes against the abutting section, the thrust buffer section has a deformation along the thrust direction.

7. The guide wire according to claim 1, characterized in that, Relative to the extending trends of the probing section and the abutting section respectively, the thrust buffer section has an extending trend different from both of them.

8. The guide wire according to claim 1, wherein, The thrust buffer section is a two-dimensional structure.

9. The guide wire according to claim 1, characterized in that, The thrust buffer section is a three-dimensional structure.

10. The guide wire according to claim 8, wherein, The thrust buffer section is an arc-shaped structure.

11. The guide wire according to claim 8, characterized in that, The thrust buffer section is a wave structure or a winding structure.

12. The guide wire according to claim 1, characterized in that, Starting from the end of the probing section, the thrust buffer section as a whole has a circumferential extending direction opposite to that of the abutting section.

13. The guide wire according to claim 12, characterized in that, The thrust buffer section is circular arc-shaped, and the corresponding central angle is 10 - 450 degrees.

14. The guide wire according to claim 13, wherein, The corresponding central angle of the thrust buffer section is 10 - 90 degrees.

15. The guide wire according to claim 14, characterized in that, The corresponding central angle of the thrust buffer section is 30 - 180 degrees.

16. The guide wire according to claim 1, characterized in that, Starting from the end of the probing section, the thrust buffer section as a whole has the same circumferential extending direction as the abutting section.

17. The guide wire according to claim 16, wherein, The thrust buffer section is circular arc-shaped, and the corresponding central angle is 10 - 360 degrees.

18. The guide wire according to claim 17, wherein The corresponding central angle of the thrust buffer section is 270 - 360 degrees.

19. The guide wire according to claim 2, wherein, The thrust buffer section is S-shaped.

20. The guide wire according to claim 2, wherein The thrust buffer section is spiral-shaped.

21. The guide wire according to claim 20, wherein, The spiral shape includes at least one layer of spiral coils, and the spiral shape is a left-handed spiral structure.

22. The guide wire according to claim 20, wherein The spiral shape includes at least one layer of spiral coils, and the spiral shape is a right-handed spiral structure.

23. The guide wire according to claim 20, wherein, The axis around which the thrust buffer section is curled is coaxial or parallel to the extending direction of the probing section.

24. The guide wire according to claim 1, characterized in that, Starting from the extending direction of the abutting section being the same as that of the probing section, the central angle corresponding to the continuously curled part of the abutting section is greater than or equal to 180 degrees.

25. The guide wire according to claim 24, characterized in that, The central angle corresponding to the continuously curled part is greater than or equal to 270 degrees.

26. The guide wire according to claim 1, wherein, The abutting section is in the same plane.

27. The guide wire according to claim 1, characterized in that, At least a part of the abutting section is a three-dimensional structure with linear extension.

28. The guide wire according to claim 27, characterized in that, At least a part of the abutting section has a fluctuating wave structure relative to the plane determined by the arc while extending along an arc path.

29. The guide wire according to claim 27, characterized in that, At least a part of the abutting section has a spiral winding structure while extending along an arc path.

30. The guide wire according to any one of claims 1 to 29, characterized in that, A guiding section is connected to the end of the abutting section.

31. The guide wire according to any one of claims 1 to 29, characterized in that, The guide wire is also provided with a pre-shaped guiding bend for changing the direction of the probing section.

32. The guide wire according to claim 31, wherein, The guiding bend is adjacent to the ascending aorta part in the use state.

33. The guide wire according to claim 31, wherein, The guiding bend has the same or opposite circumferential extending direction as the curled part of the abutting section.

34. The guide wire according to claim 33, characterized in that, The included angle of the guiding bend part is 90 - 150 degrees.

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