Increased guidewire advancement length

Abstract

Systems and methods for extending a guidewire from an insertion tool are disclosed. A guidewire assembly includes a slider configured to engage a guidewire carrier. The guidewire carrier defines an internal lumen configured to receive a guidewire therein. The guidewire carrier is biased to a nonlinearly coiled rest state and can be elastically converted to a linearly extended state. Upon distal advancement of the guidewire assembly and the slider, the slider converts the guidewire carrier from the nonlinear state to the linearly extended state. The distance traveled by the slider is less than the distance traveled by the tip of the guidewire when the guidewire carrier is converted from the coiled state to the linear state.

Description

Summary of the Invention

[0001] In short, the implementation schemes disclosed herein relate to guide wire propulsion systems and methods thereof.

[0002] This document discloses a system for advancing a guidewire from an insertion tool. The system includes a guidewire advancement assembly slidably engaged with the insertion tool and configured to switch between a proximal and distal position. The guidewire advancement assembly includes: a slider defining a slider channel; and a guidewire carrier defining an inner cavity configured to receive a guidewire therethrough. The guidewire carrier defines a nonlinear static state, and wherein the slider channel is configured to receive the guidewire carrier and convert the guidewire carrier from the nonlinear static state to a linear extension state when the guidewire advancement assembly switches from the proximal to the distal position.

[0003] In some embodiments, the nonlinear stationary state includes one of a serpentine coil shape, a coiled shape, a folded shape, or a spiral shape. The guidewire carrier is biased into the nonlinear stationary state and is formed of one of a plastic, polymer, elastomer, rubber, silicone, metal, alloy, or nickel-titanium alloy. The nonlinear stationary state includes one or more coils extending perpendicularly from the longitudinal axis, and wherein the longitudinal length of the slider is greater than the longitudinal length of one or more coils. A first distance (“a”) traveled by the slider when the guidewire advance assembly transitions between a proximal position and a distal position is less than a second distance (“b”) traveled by the tip of the guidewire when the guidewire carrier transitions between the nonlinear stationary state and a linear extension state. The relationship between the first distance (“a”) and the second distance (“b”) is expressed as:

[0004]

[0005] In some embodiments, the guidewire carrier defines a substantially circular cross-sectional shape and includes left and right guide rails extending laterally therefrom. A sliding channel defines a left recess configured to engage the left guide rail of the guidewire carrier and a right recess configured to engage the right guide rail of the guidewire carrier. The guidewire carrier engages the sliding channel in a friction-fit engagement. One of the guidewire carrier and the guidewire is coupled to the proximal end of the insertion tool. One of the proximal ends of the guidewire carrier or the guidewire is held in a longitudinally fixed position relative to the insertion tool.

[0006] A method for extending a guidewire from an insertion tool is also disclosed, comprising: providing a guidewire advancement assembly switchable between a proximal position and a distal position, the guidewire advancement assembly including a slider defining a channel and a guidewire carrier engaging with the slider channel, the guidewire carrier defining an inner cavity configured to receive a guidewire therein, the guidewire carrier being biased to a non-linear stationary state; advancing the guidewire advancement assembly from the proximal position to the distal position; sliding the slider along an outer surface of the guidewire carrier; converting the guidewire carrier from the non-linear stationary state to an extended state; and advancing the tip of the guidewire in a distal direction.

[0007] In some implementations, the nonlinear static state includes one of a serpentine, coiled, folded, or spiral shape. The guidewire carrier is elastically deformable and includes one of a plastic, polymer, elastomer, rubber, silicone, metal, alloy, or nickel-titanium alloy material. The first distance (“a”) traveled by the slider during the transition of the guidewire advance assembly between the proximal and distal positions is less than the second distance (“b”) traveled by the tip of the guidewire. The relationship between the first distance (“a”) and the second distance (“b”) is expressed as:

[0008]

[0009] In some embodiments, the guidewire carrier defines a substantially circular cross-sectional shape and includes left and right guide rails extending laterally therefrom. A sliding channel defines a left recess configured to engage the left guide rail of the guidewire carrier and a right recess configured to engage the right guide rail of the guidewire carrier. The guidewire carrier engages the sliding channel in a friction-fit engagement. One of the guidewire carrier and the guidewire is coupled to the proximal end of the insertion tool. The proximal end of the guidewire carrier or the proximal end of the guidewire is held in a longitudinally fixed position relative to the insertion tool. Attached Figure Description

[0010] A more specific description of the disclosure will be presented with reference to specific embodiments shown in the accompanying drawings. It should be understood that these drawings depict only typical embodiments of the invention and are therefore not intended to limit the scope of the invention. Exemplary embodiments of the invention will be described and explained by way of additional features and details in the drawings, using the accompanying drawings:

[0011] Figure 1A-1F Various views of a catheter insertion tool according to an embodiment disclosed herein are shown.

[0012] Figure 2 The embodiments disclosed herein are shown. Figure 1A The exploded view of the Insert tool.

[0013] Figure 3AAn exploded perspective view of a catheter advancement assembly including a guidewire carrier and a guidewire, according to an embodiment disclosed herein, is shown.

[0014] Figure 3B A cross-sectional view of a guidewire carrier according to an embodiment disclosed herein is shown.

[0015] Figure 3C A cross-sectional perspective view of a guidewire carrier according to an embodiment disclosed herein is shown.

[0016] Figure 3D A front view of a guidewire propulsion assembly according to an embodiment disclosed herein is shown.

[0017] Figure 3E A front view of a catheter advancement assembly including a guidewire carrier and a guidewire, according to an embodiment disclosed herein, is shown.

[0018] Figure 4A A perspective view of a guidewire carrier in a nonlinear state according to an embodiment disclosed herein is shown.

[0019] Figure 4B A perspective view of a guidewire carrier in a linear state according to an embodiment disclosed herein is shown.

[0020] Figure 5A A front view of a guidewire carrier in a nonlinear state according to an embodiment disclosed herein is shown.

[0021] Figure 5B A front view of a guidewire carrier in a linear state according to an embodiment disclosed herein is shown. Detailed Implementation

[0022] Before disclosing certain specific embodiments in more detail, it should be understood that the specific embodiments disclosed herein do not limit the scope of the concepts provided herein. It should also be understood that the features of the specific embodiments disclosed herein can be readily separated from the specific embodiments and optionally combined with or substituted with features of any of the other embodiments disclosed herein.

[0023] Regarding the terminology used herein, it should also be understood that these terms are for the purpose of describing certain specific embodiments and do not limit the scope of the concepts presented herein. Ordinal numbers (e.g., first, second, third, etc.) are generally used to distinguish or identify different features or steps within a set of features or a set of steps, and do not provide for a sequence or numerical limitation. For example, features or steps that are “first,” “second,” and “third” do not necessarily need to appear in order, and a particular embodiment that includes such features or steps is not necessarily limited to these three features or steps. Labels such as “left,” “right,” “top,” “bottom,” “front,” “back,” etc., are used for convenience and do not imply, for example, any particular fixed position, orientation, or direction. Rather, such labels are used to reflect, for example, relative position, orientation, or direction. Unless otherwise expressly indicated by the context, the singular forms “a,” “an,” and “the” include plural references.

[0024] For example, when a catheter is used on a patient, the terms "proximal," "proximal portion," or "proximal portion" of the catheter disclosed herein include the portion of the catheter intended to be close to the clinician. Similarly, for example, when a catheter is used on a patient, the term "proximal length" of the catheter includes the length of the catheter intended to be close to the clinician. For example, when a catheter is used on a patient, the term "proximal end" of the catheter includes the end of the catheter intended to be close to the clinician. A proximal portion, proximal portion, or proximal length of a catheter may include the proximal end of the catheter; however, a proximal portion, proximal portion, or proximal length of a catheter does not need to include the proximal end of the catheter. That is, unless the context otherwise requires, a proximal portion, proximal portion, or proximal length of a catheter is not the distal portion or distal length of the catheter.

[0025] For example, when a catheter is used on a patient, the terms "distal," "distal portion," or "distal part" of the catheter disclosed herein include the portion of the catheter intended to be near or in the patient. Similarly, for example, when a catheter is used on a patient, the term "distal length" of the catheter includes the length of the catheter intended to be near or in the patient. For example, when a catheter is used on a patient, the term "distal end" of the catheter includes the end of the catheter intended to be near or in the patient. The distal portion, distal part, or distal length of a catheter may include the distal end of the catheter; however, the distal portion, distal part, or distal length of a catheter need not include the distal end of the catheter. That is, unless the context otherwise requires, the distal portion, distal end, or distal length of a catheter is not the distal portion or distal length of the catheter.

[0026] To help describe the implementation scheme described in this article, such as Figure 1A As shown, the longitudinal axis extends substantially parallel to the axial length of guidewire 22. The lateral axis extends perpendicular to the longitudinal axis, while the transverse axis extends perpendicular to both the longitudinal and lateral axes.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

[0028] In summary, the embodiments described herein generally relate to insertion tools for inserting catheters or other tubular medical devices into a patient. In one embodiment, the insertion tool unifies needle insertion, guidewire advancement, and catheter insertion in a single device to provide a simplified catheter placement procedure. The insertion tool also includes a multiplier, wherein advancement of a single unit of guidewire assembly from the insertion tool provides more than one unit of guidewire advancement.

[0029] Figure 1A -F and 2 describe various details of the exemplary insertion tool 10 according to the embodiments disclosed herein. For example Figure 1A and 2 As shown, the insertion tool 10 includes a top housing portion 12A and a bottom housing portion 12B of a housing 12, with a conduit 42 extending from the housing 12 and disposed above the needle 16. Figure 1 also shows a finger pad 1218 of the guidewire advancement assembly 20, which, together with a portion of the handle assembly 1220 of the conduit advancement assembly 40, is slidably disposed in a slot 1236 (defined in the top housing portion 12A). Further details and embodiments of the exemplary insertion tool 10 can be found in US 8,932,258, US 9,872,971, US 9,950,139 and US 10,384,039, each of which is incorporated herein by reference in its entirety.

[0030] Figure 1A-1FA finger pad 1218 is shown, which is part of the guidewire advance assembly 20 and can be slid distally along slot 1236 by one or more fingers of a clinician to selectively advance the guidewire 22 (initially positioned within the lumen of the needle 16) out of the distal end 16B of the needle 16. In an embodiment, the proximal end of the guidewire 22 may be attached to a proximal portion of the housing 12. In an embodiment, the insertion tool 10 may include one or more guidewire advance multiplier mechanisms. For example, a multiplier advance mechanism may include the proximal end of the guidewire 22 attached to an inner portion of the top housing portion 12A, such that a distal sliding advance of a single unit of the finger pad 1218 results in the advance of two units of the distal guidewire. This can be made possible by forming a loop from the attachment point of the guidewire 22 on the top housing portion 12A and through a guide surface 980 included on the guidewire stalk 24 before the guidewire 22 extends into the lumen of the needle 16. Further details of the “forming a ring” guide wire propulsion multiplier mechanism can be found in U.S. Patent Nos. 9,872,971, 9,950,139 and 10,384,039, each of which is incorporated herein by reference in its entirety.

[0031] In one embodiment, the "guidewire carrier" multiplier propulsion mechanism may include a guidewire 22 disposed within a guidewire carrier 440, which defines a non-linear coiled shape. The propulsion guidewire assembly 20 may constrain the guidewire carrier to a linear shape such that distal sliding propulsion of a single unit of finger pad 1218 results in propulsion of more than one unit of distal guidewire, as described in more detail herein. In another embodiment, the insertion tool 10 may include both or features of a "ring-forming" guidewire propulsion multiplier mechanism and a "guidewire carrier" propulsion mechanism to provide a compound propulsion multiplication effect by using both guidewire propulsion mechanisms simultaneously. It will be understood that additional guidewire multiplier propulsion mechanisms may be used instead of or in addition to the guidewire multiplier propulsion mechanisms described herein. In one embodiment, the guidewire rod 24 and finger pad 1218 of the guidewire propulsion assembly 20 may be integrally formed with each other, but they may be formed separately in other embodiments. It should also be noted that the guidewire 22 can be attached to other external or internal parts of the insertion tool 10, including the bottom housing part 12B, the needle bushing 1214, etc.

[0032] Figure 1A-1F A catheter advancement assembly 40 is further shown for selectively advancing the catheter 42 distally out of the housing 12 of the insertion tool 10. The catheter advancement assembly 40 includes a handle assembly 1220, which in turn includes two wings 1280, etc., which are grasped by the clinician's fingers when the catheter is to be advanced. The wings 1280 are advanced distally through a gap 1250 defined between the top housing portion 12A and the bottom housing portion 12B.

[0033] Figure 2 An exploded view of the insertion tool 10 shows a handle assembly 1220 including a head portion 1222 (from which a wing 1280 extends) and a tail portion 1224. Both the head portion 1222 and the tail portion 1224 are removably attached to a catheter bushing 46. The internal components of the insertion tool 10, each through which a needle 16 passes, arranged within the housing 12, include a valve 52, a safety housing 54 (in which a carriage 1008 and a needle safety component 56 are disposed), and a cover 58 for the safety housing. An O-ring 1002 included with the needle safety component 56 is also shown, as is a needle bushing 1214, which is secured to the proximal end of the needle 16 and mounted to the housing 12 to hold the needle 16 in a suitable position within the insertion tool 10. Figure 2 It should be noted that in one embodiment, the slot 1236 in which the finger pad of the guide wire advance assembly 20 is placed includes a relatively wide portion to allow the guide wire rod 24 to be inserted through it in order to connect the guide wire advance assembly to the housing 12.

[0034] Figures 3A-4B Further details of an embodiment of the guidewire advancement assembly 20 are shown. The guidewire advancement assembly 20 may include a slider 330 extending from a distal end 330B to a proximal end 330C and configured to engage a guidewire carrier 440 disposed within the housing 12 of the insertion tool 10. The guidewire carrier 440 may extend from the distal end 440B to the proximal end 440C and may define a guidewire carrier cavity 442 extending longitudinally and configured to receive a guidewire 22 extending therethrough.

[0035] In the implementation, the guidewire carrier 440 can be defined in a non-linear shape, for example... Figure 3A and 4A The serpentine coil shape is shown. In an embodiment, the guidewire carrier 440 can be formed of a flexible material, such as plastic, polymer, elastomer, rubber, silicone, metal, alloy, nitinol, or combinations thereof. The guidewire carrier 440 can be oriented in a nonlinear state ( Figure 4A The guidewire carrier 440 is biased so that, when at rest, it returns to a nonlinear state. In an embodiment, the guidewire carrier 440 can elastically deform from a nonlinear rest state to a linear extension state. Figure 4B Then, when the deformation force is removed, the guide wire carrier 440 can return to its nonlinear static state.

[0036] Figure 4AFurther details of an implementation of the nonlinear configuration are shown, for example, a serpentine coil shape extending along a horizontal plane. Each coil 450 can extend laterally from a central longitudinal axis. Each adjacent coil can extend laterally in the opposite direction to the previous coil to define the serpentine shape. The apex of the coil 450 can extend laterally a distance (d) from the central longitudinal axis. Thus, the guidewire carrier can extend laterally a distance (2d). The radius of curvature (r) of the apex of each coil can also vary. For example, for a given longitudinal distance (x), a smaller radius of curvature (r) will provide a greater number of coils 450 within the distance (x). Thus, the larger the distance (d), the smaller the radius of curvature (r), or a combination thereof, the greater the total length (y) of the guidewire carrier 440 that can be adapted within a given longitudinal distance (x).

[0037] Although a coil extending along a lateral axis is shown, it will be understood that this is a simplified illustration, and coils extending along lateral axes, transverse axes, axes arranged at angles therebetween, or combinations thereof, are also contemplated and fall within the scope of the invention. Furthermore, adjacent coils may define the same lateral distance (d), the same radius of curvature (r), or different lateral distances (d) or radii of curvature (r), or combinations thereof. Additionally, it will be understood that other nonlinear configurations are also contemplated; for example, the guidewire carrier may comprise coiled, folded, helical, or combinations thereof, and still fall within the scope of the invention.

[0038] like Figure 3B-3E As shown, in one embodiment, the slider 330 can be configured to engage the guidewire carrier 440. The slider 330 can define a channel 332 configured to receive the guidewire carrier 440 passing through it. Figure 3B-3C As shown, the guidewire carrier 440 has a generally circular cross-sectional shape and includes one or more rectangular guide rails extending laterally from its side surfaces, such as left guide rail 444A and right guide rail 444B. It will be understood that other cross-sectional shapes are also considered to fall within the scope of the invention. Figure 3B and 3E As shown, the left guide rail 444A can be configured to engage the left recess 334A of the slider channel 332, and the right guide rail 444B can be configured to engage the right recess 334B of the slider channel 332. In an embodiment, the slider 330 may include a longitudinal opening 336 disposed on the underside of the slider and communicating with the slider channel 332. During manufacturing and assembly, the opening 336 may facilitate the entry / exit of the guidewire carrier 440 and the guidewire 22 disposed therein. Furthermore, the opening 336 may facilitate the operation of other guidewire propulsion multiplier mechanisms (e.g., "ring-forming" guidewire propulsion multiplier mechanisms as described herein). As described herein, using two or more guidewire propulsion multiplier mechanisms can provide a compound multiplication effect.

[0039] In one embodiment, the lateral width of channel 332 may be substantially the same as the lateral width (w) of the cross-sectional shape of guidewire carrier 440. The longitudinal length of slider 330 may be greater than the longitudinal length of at least one coil 450. In another embodiment, the longitudinal length of slider 330 may be greater than the longitudinal length of multiple coils, for example, by a distance (x). Thus, slider channel 332 may limit the lateral extension of one or more coils 450 of guidewire carrier 440.

[0040] like Figures 5A-5B As shown, in an exemplary method of use, the slider 330 of the catheter assembly 20 engages a portion of the guidewire carrier 440 through which the guidewire 22 is disposed. In an embodiment, the proximal end 440C of the guidewire carrier 440 and optionally the guidewire 22 may be coupled to a proximal portion of the insertion tool housing 12. Thus, the proximal end of the guidewire carrier 440 / guidewire 22 assembly is held in a fixed position relative to the insertion tool 10. In an embodiment, as described herein, the guidewire 22, the guidewire carrier 440, or a combination thereof may form a loop around the proximal end of the guidewire rod 24 and be attached to a portion of the housing 12. Thus, the insertion tool 10 may employ a combination of guidewire advance multiplier mechanisms to advance the guidewire 22.

[0041] The guidewire advancement assembly 20 can be pushed distally by the user pushing the finger pad 1218 distally through the slot 1236. As the slider 330 travels from the proximal end to the distal end, the slider 330 moves the guidewire carrier 440 from a non-linear state ( Figure 5A ) transforms into an extended linear state ( Figure 5B For example, as the slider 330 advances distally, it engages the guidewire carrier 440 and restricts the lateral extension of one or more coils 450. As the slider 330 continues to advance distally, additional coils are similarly laterally restricted. Figure 5B Thus, the previous state of stillness, coiled up ( Figure 5A A length (y) of the guidewire carrier contained within a given longitudinal distance (x) now extends distally in an extended nonlinear state. Figure 5B A portion of the guidewire 22 disposed within the guidewire carrier 440 is similarly converted from a nonlinear configuration to an extended linear configuration, and the distal tip 22B of the guidewire 22 extends distally.

[0042] Advantageously, the guidewire carrier 440 and the slider 330 provide a multiplier effect, wherein one unit of distal advance of the guidewire assembly 20 provides more than one unit of distal extension of the guidewire tip 22B. More specifically, the ratio of the movement of the guidewire assembly 20 to the advance of the guidewire tip 22B can be expressed as:

[0043]

[0044] Where “a” is the minor axis length of the nonlinear path, and “b” is the major axis length of the nonlinear path. The slider 330 can extend substantially a distance (x) along the minor axis (“a”), while the guidewire tip 22B can extend substantially a length (y) distally along the major axis (“b”). As previously stated, the greater the distance (d), the smaller the radius of curvature (r), or a combination thereof, the larger the major axis “b” relative to the minor axis “a”, and the greater the multiplication effect for advancing the guidewire tip 22B.

[0045] Advantageously, the multiplier mechanism allows the insertion tool 10 to remain the same length while allowing a longer guide wire 22 to be stored therein and extend from it. In other words, a relatively more compact insertion tool 10 can be provided while still providing a guide wire 22 of similar length stored therein.

[0046] In the implementation scheme, the slider 330 engages the guide wire carrier 440 via friction engagement. For example... Figure 3A As shown, when the portion of the guidewire carrier 440 arranged within the slider channel 332 is compressed into a linear state, the proximal portion of the guidewire carrier 440 arranged between the proximal end 330C of the slider 330 and the proximal end 440C of the guidewire carrier 440 also remains in a linear configuration. Because the proximal portion of the guidewire carrier 440 is stretched between the slider 330 and the proximal end of the insertion tool 10, it cannot return to a non-linear configuration. When the guidewire assembly 20 is positioned at its furthest point within the slot 1236, the slider 330 maintains the entire guidewire carrier 440 in a linearly extended state.

[0047] It will also be understood that guidewire 22 can retract in a similar manner. Guidewire assembly 20 can be pushed from the furthest position within slot 1236 to the nearest position. Slider 330 retracts proximally along guidewire carrier 440 and removes the deformation force from guidewire carrier 440. Guidewire carrier 440 transitions from a linear state to a nonlinear static state, and guidewire 22 retracts into guidewire carrier cavity 332.

[0048] Although certain specific embodiments have been disclosed herein, and although these specific embodiments have been disclosed in detail, they are not intended to limit the scope of the concepts provided herein. Other adaptations and / or modifications will occur to those skilled in the art, and these adaptations and / or modifications are included in a broader sense. Therefore, deviations from the specific embodiments disclosed herein are permissible without departing from the scope of the concepts provided herein.

Claims

1. A system for advancing a guidewire from an insertion tool, characterized in that, include: A guidewire advancement assembly, slidably engaged with the insertion tool and configured to switch between a proximal and distal position, the guidewire advancement assembly comprising: The slider defines the slider channel; and A guidewire carrier defines an inner cavity configured to receive the guidewire therethrough, the guidewire carrier defining a nonlinear static state. The sliding channel is configured to receive the guidewire carrier and convert the guidewire carrier from the nonlinear static state to a linear extension state when the guidewire advance assembly changes from the proximal position to the distal position, and wherein the guidewire carrier in the distal position maintains the entire guidewire carrier in the linear extension state.

2. The system according to claim 1, characterized in that, The nonlinear static state includes one of the following: a serpentine shape, a coiled shape, a folded shape, or a spiral shape.

3. The system according to claim 1, characterized in that, The guidewire carrier is biased to the nonlinear static state and is formed of one of a polymer, elastomer, silicone, metal or alloy.

4. The system according to claim 1, characterized in that, The guidewire carrier is biased into the nonlinear static state and is formed of plastic.

5. The system according to claim 1, characterized in that, The guidewire carrier is biased into the nonlinear static state and is formed of rubber.

6. The system according to claim 1, characterized in that, The guidewire carrier is biased to the nonlinear static state and is formed of a nickel-titanium alloy.

7. The system according to claim 1, characterized in that, The nonlinear static state includes one or more curls extending vertically from the longitudinal axis, and wherein the longitudinal length of the slider is greater than the longitudinal length of one or more curls.

8. The system according to claim 1, characterized in that, The first distance the slider travels when the guidewire advancement assembly transitions between the proximal and distal positions is less than the second distance the tip of the guidewire travels when the guidewire carrier transitions between the nonlinear static state and the linear extension state.

9. The system according to claim 8, characterized in that, The ratio between the first distance and the second distance is expressed as: ， Where a is the minor axis length of the nonlinear path, and b is the major axis length of the nonlinear path.

10. The system according to claim 1, characterized in that, The guidewire carrier defines a substantially circular cross-sectional shape and includes a left guide rail and a right guide rail extending laterally therefrom.

11. The system according to claim 10, characterized in that, The sliding channel defines a left recess of the left guide rail configured to engage the guide wire carrier, and a right recess of the right guide rail configured to engage the guide wire carrier.

12. The system according to claim 1, characterized in that, The guide wire carrier engages with the sliding channel via a friction fit.

13. The system according to claim 1, characterized in that, One of the guidewire carrier and the guidewire is connected to the proximal end of the insertion tool.

14. The system according to claim 1, characterized in that, One of the proximal ends of the guidewire carrier or the guidewire is held in a longitudinally fixed position relative to the insertion tool.

15. A method for extending a guidewire from an insertion tool, characterized in that, include: A guidewire advancement assembly is provided, which is convertible between a proximal position and a distal position, and the guidewire advancement assembly includes: A slider that defines a slider channel; and A guidewire carrier engages with the sliding channel and defines an inner cavity configured to receive the guidewire therein, the guidewire carrier being biased to a non-linear static state; Advance the guidewire advance assembly from the proximal position to the distal position; Slide the slider along the outer surface of the guidewire carrier; The guidewire carrier is transitioned from the nonlinear static state to the extended state, while the guidewire carrier in the distal position maintains its overall linear extension state; and Advance the tip of the guidewire in the distal direction.

16. The method according to claim 15, characterized in that, The nonlinear static state includes one of the following: a serpentine shape, a coiled shape, a folded shape, or a spiral shape.

17. The method according to claim 15, characterized in that, The guidewire carrier is elastically deformable and comprises one of a polymer, elastomer, silicone, metal, or alloy.

18. The method according to claim 15, characterized in that, The guidewire carrier is elastically deformable and is made of plastic.

19. The method according to claim 15, characterized in that, The guidewire carrier is elastically deformable and is formed of rubber.

20. The method according to claim 15, characterized in that, The guidewire carrier is elastically deformable and is formed of a nickel-titanium alloy material.

21. The method according to claim 15, characterized in that, The first distance traveled by the slider when the guidewire advancement assembly switches between the proximal and distal positions is less than the second distance traveled by the tip of the guidewire.

22. The method according to claim 21, characterized in that, The ratio between the first distance and the second distance is expressed as: ， Where a is the minor axis length of the nonlinear path, and b is the major axis length of the nonlinear path.

23. The method according to claim 15, characterized in that, The guidewire carrier defines a substantially circular cross-sectional shape and includes a left guide rail and a right guide rail extending laterally therefrom.

24. The method according to claim 23, characterized in that, The sliding channel defines a left recess of the left guide rail configured to engage the guide wire carrier, and a right recess of the right guide rail configured to engage the guide wire carrier.

25. The method according to claim 15, characterized in that, The guide wire carrier engages with the sliding channel via a friction fit.

26. The method according to claim 15, characterized in that, One of the guidewire carrier and the guidewire is connected to the proximal end of the insertion tool.

27. The method according to claim 15, characterized in that, The proximal end of the guidewire carrier or the proximal end of the guidewire is held in a fixed longitudinal position relative to the insertion tool.

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