Catheter system with guidewire and spring-loaded needle housing
The catheter system with a spring-loaded needle housing and guidewire slider mechanism addresses the challenges of guidewire placement and needle retraction, ensuring safe and efficient vascular access by controlling needle withdrawal and guidewire advancement.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- BECTON DICKINSON & CO
- Filing Date
- 2024-05-09
- Publication Date
- 2026-06-04
AI Technical Summary
Existing catheter systems face challenges in efficiently guiding a guidewire through a patient's blood vessel while ensuring safe and controlled retraction of the introducer needle after use.
A catheter system with a spring-loaded needle housing and a guidewire slider mechanism that allows for controlled advancement and retraction of the introducer needle, utilizing a series of flexible arms, ramps, and slots to facilitate guidewire insertion and needle withdrawal, ensuring safe and efficient vascular access.
The system enables precise guidewire placement and safe needle retraction, enhancing the safety and efficiency of vascular access procedures by preventing premature needle withdrawal and minimizing patient discomfort.
Smart Images
Figure 2026518276000001_ABST
Abstract
Description
Background Art
[0001] Catheters are used in a variety of infusion therapies. For example, a catheter may be used for the infusion of normal saline, various drugs, and fluids to patients such as total parenteral nutrition. A catheter may also be used to draw blood from a patient.
[0002] A common type of catheter assembly includes a catheter that is an over-the-needle. As its name indicates, an over-the-needle catheter can be mounted on a introducer needle with a sharp distal tip. The catheter assembly may include a catheter hub, a catheter extending distally from the catheter hub, and an introducer needle extending through the catheter. The catheter and the introducer needle can be assembled such that the distal tip of the introducer needle extends beyond the distal tip of the catheter and the needle bevel faces away from the patient's skin. The catheter and the introducer needle are generally inserted at a shallow angle through the skin into the patient's blood vessel.
[0003] The subject matter claimed herein is not limited to embodiments that solve problems or that operate only in the situations described above. Rather, this background art is provided only to illustrate an example of a technical area in which some of the embodiments described herein may be practiced.
Summary of the Invention
[0004] The present disclosure generally relates to vascular access devices, systems, and methods. In particular, the present disclosure relates to a catheter system having a guide wire and spring-loaded needle housing, as well as related devices and methods.
[0005] In some embodiments, the catheter system may include a catheter hub that has a distal end, a proximal end, and lumens extending through the distal end and proximal end of the catheter hub. In some embodiments, the catheter system may include a catheter that has a distal tip. In some embodiments, the catheter may extend from the distal end of the catheter hub.
[0006] In some embodiments, the catheter system may include a barrel that has a distal end, a proximal end, and a slot. In some embodiments, the catheter system may include a flexible arm. In some embodiments, the catheter system may include a clip located within the barrel. In some embodiments, the catheter system may include a needle hub located within the barrel. In some embodiments, the catheter system may include an introduction needle that has a sharp distal tip and a proximal end. In some embodiments, the proximal end of the introduction needle may be fixed within the needle hub. In some embodiments, the catheter system may include a spring connected to the needle hub.
[0007] In some embodiments, the catheter system may include a catheter hub slider extending through a slot. In some embodiments, the catheter hub slider may include an arm extending distally. In some embodiments, the catheter system may include a guidewire, which may have a first end and a second end. In some embodiments, the first end may be configured to advance distally through the introduction needle. In some embodiments, the catheter system may include a guidewire slider extending from the slot.
[0008] In some embodiments, the catheter system may be configured to move from a first position to a second position. In some embodiments, when the catheter system is in the first position, the guidewire slider may be positioned in the proximal position of the guidewire slider and configured to slide along the slot to advance the guidewire from the proximal position to the distal position of the guidewire slider. In some embodiments, when the catheter system is in the first position, the catheter hub slider may be positioned in the proximal position of the catheter hub slider. In some embodiments, when the catheter system is in the first position, a clip may connect the catheter hub to the barrel to fix the catheter hub with respect to the barrel. In some embodiments, when the catheter system is in the first position, an arm extending distally from the catheter hub slider may be connected to the catheter hub to prevent distal and proximal movement of the catheter hub slider with respect to the catheter hub. In some embodiments, when the catheter system is in the first position, an introduction needle may extend through the catheter. In some embodiments, when the catheter system is in a first position, the flexible arm may contact the needle hub to hold the spring in a compressed position.
[0009] In some embodiments, when the catheter system is in the second position, the guidewire slider may be positioned distally so that the guidewire advances beyond the distal tip of the catheter. In some embodiments, when the catheter system is in the second position, the catheter hub slider may be positioned in the proximal position of the catheter hub slider. In some embodiments, when the catheter system is in the second position, the distal arm of the catheter hub slider may be connected to the catheter hub to prevent distal and proximal movement of the catheter hub slider with respect to the catheter hub. In some embodiments, when the catheter system is in the second position, the introduction needle may extend through the catheter. In some embodiments, when the catheter system is in the second position, the flexible arm may contact the needle hub to hold the spring in a compressed position.
[0010] In some embodiments, in response to the movement of the catheter system from a first position to a second position, the extended arm of the guidewire slider may contact the clip to disengage the clip from the catheter hub. In some embodiments, in response to disengaging the clip from the catheter hub, the catheter hub slider may be configured to slide from a proximal position to a distally advanced position. In some embodiments, in response to sliding the catheter hub slider from a proximal position to a distally advanced position, the catheter hub may be configured to advance distally.
[0011] In some embodiments, the second end of the guidewire may be fixed within the barrel. In some embodiments, the guidewire slider may have an arched slot through which it passes. In some embodiments, when the catheter system is in a first position, the guidewire may be positioned in the arched slot in a double-throw configuration such that the advance ratio between the first end of the guidewire and the guidewire slider is 2:1. In some embodiments, the arched slot may be positioned horizontally within the barrel. In some embodiments, the barrel may have a proximal medial ramp. In some embodiments, in response to the movement of the catheter system from a first position to a second position, the guidewire slider may be lifted within the barrel by the proximal medial ramp so that the guidewire is removed from the arched slot.
[0012] In some embodiments, the catheter hub may have a groove. In some embodiments, the barrel may have a distal inner ramp. In some embodiments, the catheter system may be configured to move from a second position to a third position. In some embodiments, when the catheter system is in the third position, the guidewire slider may be positioned in the distal position so that the guidewire advances beyond the distal tip of the catheter. In some embodiments, when the catheter system is in the third position, the catheter hub slider may be positioned in a distally advanced position. In some embodiments, when the catheter system is in the third position, the introduction needle may extend through the catheter. In some embodiments, when the catheter system is in the third position, the flexible arm may contact the needle hub to hold the spring in a compressed position.
[0013] In some embodiments, in response to the movement of the catheter system from a second position to a third position, the distal arm of the catheter hub slider may contact the distal inner ramp of the barrel, lifting the arm distal to the groove of the catheter hub and disengaging the catheter hub slider from the catheter hub. In some embodiments, the proximal end of the catheter hub may be provided with a groove.
[0014] In some embodiments, the distally advanced position of the catheter hub slider is a partially distally advanced position. In some embodiments, the catheter system may be configured to move from a third position to a fourth position. In some embodiments, when the catheter system is in the fourth position, the guidewire slider is positioned in the distal position so that the guidewire advances beyond the distal tip of the catheter. In some embodiments, when the catheter system is in the fourth position, the catheter hub slider may be positioned in a fully distally advanced position. In some embodiments, in response to the movement of the catheter system from the third position to the fourth position, the catheter hub slider may protrude on a flexible arm, the flexible arm may be disengaged from contact with the needle hub, and a spring may extend, moving the needle hub proximal and retracting the introduction needle into the barrel.
[0015] In some embodiments, the flexible arm may be provided with fins that taper inward distally. In some embodiments, in response to the movement of the catheter system from a third position to a fourth position, the catheter hub slider may protrude on the fins so that the flexible arm is disengaged from contact with the needle hub, and a spring extends, moving the needle hub proximally and retracting the introduction needle into the barrel.
[0016] In some embodiments, the flexible arm is a first flexible arm. In some embodiments, the barrel may have a second flexible arm proximal to the first flexible arm. In some embodiments, the second flexible arm may have a second fin that tapers inward in the proximal direction. In some embodiments, in response to the spring extending and moving the needle hub proximal, the second flexible arm may bend outward to allow the needle hub to pass through the second fin, and then bend inward to fit the needle hub proximal to the second fin. In some embodiments, when the catheter system is between the first and second positions, the guidewire slider is configured to move posteriorly and anteriorly or distally and proximally.
[0017] In some embodiments, when the catheter system is in a first position, the guidewire slider may be located on top of the catheter hub slider. In some embodiments, the proximal end of the catheter hub slider may be provided with a tab to prevent the catheter hub slider from sliding proximal to the tab. In some embodiments, the distal arm of the catheter hub slider may be provided with a hook and / or an internal projection proximal to the hook. In some embodiments, in response to the movement of the catheter system from a second position to a third position, the distal arm of the catheter hub slider may, on the inner surface of the barrel, contact a distal internal ramp to lift the hook out of the groove of the catheter hub, thereby disengaging the catheter hub slider from the catheter hub, and while the hook is lifted out of the groove, the internal projection remains in contact with the proximal end of the catheter hub so that the catheter hub slider is configured to push the catheter hub distally.
[0018] In some embodiments, when the guidewire slider is in the proximal position, the catheter hub slider may be prevented from sliding along the slot to a position distal to the proximal position of the guidewire slider. In some embodiments, the catheter hub slider may be configured such that the spring extends and the introduction needle is retracted into the barrel only after the catheter hub has advanced distally and the connection has been disengaged from the catheter hub.
[0019] It should be understood that both the above-mentioned general description and the following detailed description are illustrative and for illustrative purposes only, and do not limit the claimed invention. It should be understood that various embodiments are not limited to the arrangements and means shown in the figures. It should also be understood that embodiments may be combined, or other embodiments may be used, and structural modifications may be made without departing from the scope of the various embodiments of the invention, unless otherwise claimed. Accordingly, the following detailed description should not be interpreted as restrictive. [Brief explanation of the drawing]
[0020] Exemplary embodiments are described and explained in more specific and detail with reference to the accompanying drawings. [Figure 1A] Figure 1A is a top perspective view of an exemplary catheter system in an exemplary first position according to several embodiments. [Figure 1B] Figure 1B is a cross-sectional view of a catheter system along line 1B-1B in Figure 1A, according to several embodiments. [Figure 1C] Figure 1C is a cross-sectional view of a catheter system along line 1C-1C in Figure 1A, according to several embodiments. [Figure 1D] Figure 1D is another cross-sectional view of a catheter system according to several embodiments. [Figure 2A] Figure 2A is a top perspective view of the catheter system in an exemplary second position according to several embodiments. [Figure 2B] Figure 2B is a top perspective view of a catheter system in a second position, showing an exemplary clip detached from an exemplary catheter hub, according to several embodiments. [Figure 2C]FIG. 2C is a cutaway view of a portion of a catheter system in a second position showing an exemplary guidewire lifted within an exemplary barrel by an exemplary proximal inner lamp such that the exemplary guidewire can be removed from an exemplary arch-shaped slot. [Figure 2D] FIG. 2D is a cutaway view of a portion of a catheter system in a second position showing an exemplary needle hub locked in position by an exemplary fin, according to some embodiments. [Figure 2E] FIG. 2E is a cross-sectional view of the catheter system taken along line 2E-2E of FIG. 2A, according to some embodiments. [Figure 2F] FIG. 2F is a cross-sectional view of the catheter system taken along line 2F-2F of FIG. 2A, according to some embodiments. [Figure 2G] FIG. 2G is a cutaway view of a portion of an exemplary catheter system moved from a second position to an exemplary third position and an exemplary catheter hub slider configured to push and pull on an exemplary catheter hub, according to some embodiments. [Figure 3A] FIG. 3A is a top view of the catheter system in a third position, according to some embodiments. [Figure 3B] FIG. 3B is a cross-sectional view of the catheter system taken along line 3B-3B of FIG. 3A, according to some embodiments. [Figure 3C] FIG. 3C is a cross-sectional view of the catheter system taken along line 3C-3C of FIG. 3A, according to some embodiments. [Figure 4A] FIG. 4A is a top view of the catheter system in an exemplary fourth position. [Figure 4B] FIG. 4B is a cross-sectional view of the catheter system taken along line 4B-4B of FIG. 4A, according to some embodiments. [Figure 4C] FIG. 4C is a cross-sectional view of the catheter system taken along line 4C-4C of FIG. 4A, according to some embodiments. [Figure 4D]Figure 4D is an upper perspective view of a catheter system moved from a third position to a fourth position according to several embodiments, and a catheter hub slider protruding on the flexible arm and disengaging the flexible arm from contact with the needle hub. [Figure 4E] Figure 4E is a partial cutaway of a catheter system showing a needle hub locked in the proximal end of the barrel, according to several embodiments. [Modes for carrying out the invention]
[0021] Now, referring to Figures 1-2, in some embodiments, the catheter system 10 may include a catheter hub 12 having a distal end 14, a proximal end 16, and a lumen 18 extending through the distal end 14 and the proximal end 16 of the catheter hub 12. In some embodiments, the catheter system 10 may include a catheter 20 having a distal tip 22. In some embodiments, the catheter 20 may extend from the distal end 14 of the catheter hub 12. In some embodiments, the catheter system 10 may include an arterial catheter system, a peripheral venous catheter system, a midline catheter system, a peripherally inserted central venous catheter system, or another preferred catheter system.
[0022] In some embodiments, the catheter system 10 may include a barrel 24 having a distal end 26, a proximal end 28, and a slot 30. In some embodiments, the catheter system 10 may include a needle hub 32 located within the barrel 24. In some embodiments, the catheter system 10 may include an introduction needle 34 having a sharp distal tip 36 and a proximal end 38. In some embodiments, the proximal end 38 of the introduction needle 34 may be fixed within the needle hub 32.
[0023] In some embodiments, the catheter system 10 may include a catheter hub slider 40 configured to extend through and move along the slot 30. In some embodiments, the catheter hub slider 40 may include a distally extending arm 42 configured to connect to the catheter hub 12. In some embodiments, the catheter system 10 may include a guidewire, which may have a first end 46 and a second end 48. In some embodiments, the first end 46 may be configured to advance distally through the introduction needle 34. In some embodiments, the catheter system 10 may include a guidewire slider 50 configured to extend through and move along the slot 30.
[0024] In some embodiments, the catheter system 10 may be configured to move from a first position, for example, as shown in Figure 1A-1E, to a second position, for example, as shown in Figure 2A-2E. In some embodiments, when the catheter system 10 is in the first position, the guidewire slider 50 may be positioned in the proximal guidewire slider position and configured to slide along the slot 30 to advance the guidewire 44 from the proximal guidewire slider position to the distal position. In some embodiments, when the catheter system 10 is between the first and second positions, the guidewire slider 50 may be configured to move backward and forward with respect to the catheter 20 to change the position of the first end 46 of the guidewire 44.
[0025] In some embodiments, when the catheter system 10 is in a first position, the catheter hub slider 40 may be positioned in a proximal position. In some embodiments, when the guidewire slider 50 is in a proximal position, the catheter hub slider 40 may be prevented from sliding along the slot 30. In further detail, in some embodiments, when the guidewire slider 50 is in a proximal position, the catheter hub slider 40 may be prevented from sliding from the proximal position to the distal advancement position. Thus, in some embodiments, distal advancement of the catheter hub 12 is prevented until after the guidewire 44 has advanced distally.
[0026] In some embodiments, the catheter system 10 may include a clip 52. In some embodiments, when the catheter system 10 is in the first position, the clip 52 may be connected to the catheter hub 12 to fix the barrel 24 to the catheter hub 12 with respect to the barrel 24. In some embodiments, when the catheter system 10 is in the first position, the distally extending arm 42 of the catheter hub slider 40 may be connected to the catheter hub 12 to prevent distal and proximal movement of the catheter hub slider 40 with respect to the catheter hub 12. In some embodiments, when the catheter system 10 is in the first position, the introduction needle 34 may extend through the catheter 20. In some embodiments, in the first position, the catheter system 10 may be prepared for insertion into the patient's blood vessel.
[0027] In some embodiments, the catheter system 10 may include a spring 54 that can be connected to the needle hub 32. In some embodiments, as will be described in detail below, the spring 54 may act as a passive safety mechanism to facilitate the retraction of the introduction needle 34 into the barrel. In some embodiments, the catheter system 10 may include a flexible arm 55. In some embodiments, the barrel 24 may include the flexible arm 55. In some embodiments, when the catheter system 10 is in a first position, the flexible arm 55 may contact the needle hub 32 to hold the spring 54 in a compressed position. In some embodiments, the flexible arm 55 may include a fin 56 that tapers inward distally. In some embodiments, when the catheter system 10 is in a first position, the fin 56 may contact the needle hub 32 to hold the spring 54 in a compressed position.
[0028] In some embodiments, when the catheter system 10 is in a first position, the guidewire slider 50 may be located above the catheter hub slider 40. In some embodiments, if the resulting catheter hub slider 40 does not slide along the slot 30 or does not move after the guidewire slider 50 has moved, the guidewire slider 50 above the catheter hub slider 40 may be facilitated by the physician with a simple, ergonomic device without negatively affecting the use of the catheter hub slider 40. In some embodiments, the proximal end of the catheter hub slider 40 may be provided with a tab 58 to prevent the guidewire slider 50 from sliding proximal to the tab 58.
[0029] In some embodiments, when the catheter system 10 is in a second position, the guidewire slider 50 may be positioned distally so that the guidewire 44 advances beyond the distal tip 22 of the catheter 20. In some embodiments, the first end 46 of the guidewire 44 may be positioned inside the introduction needle 34 in the first position and exit from the sharp distal tip 36 of the introduction needle 34 in response to the movement of the catheter system 10 from the first position to the second position.
[0030] In some embodiments, when the catheter system 10 is in the second position, the catheter hub slider 40 may be positioned in the proximal position of the catheter hub slider. In some embodiments, when the catheter system 10 is in the second position, the distal arm 42 of the catheter hub slider 40 may be connected to the catheter hub 12 to prevent distal and proximal movement of the catheter hub slider 40 with respect to the catheter hub 12. In some embodiments, when the catheter system 10 is in the second position, the introduction needle 34 may extend through the catheter 20. In some embodiments, when the catheter system 10 is in the second position, the fin 56 may contact the needle hub 32 to hold the spring in a compressed position.
[0031] In some embodiments, in response to the movement of the catheter system 10 from a first position to a second position, the extended arm 57 of the guidewire slider 50 may contact the clip 52 to disengage the clip 52 from the catheter hub 12. For example, as shown in Figure 2B, in some embodiments, the clip 52 may be a V-shaped clip having a claw 59 inserted into a groove 64 of the catheter hub 12 in the first position. In some embodiments, as the catheter system 10 moves from the first position to the second position and the guidewire slider 50 advances distally, the extended arm 57 may be a V-shaped clip that disengages the claw 59 from the groove 64. In some embodiments, in response to the clip 52 disengaging from the catheter hub 12, the catheter hub slider 40 may be configured to slide from a proximal catheter hub slider position to a distally advanced position. In some embodiments, the catheter hub 12 may be configured to advance distally in response to sliding the catheter hub slider 40 from a proximal position to a distal advance position.
[0032] In some embodiments, the second end 48 of the guidewire 44 may be fixed within the barrel 24. In some embodiments, the guidewire slider 50 may have an arched slot 60 through which it passes, facilitating the movement of the guidewire 44 through it in a double-throw configuration. In some embodiments, when the catheter system 10 is in a first position, the guidewire 44 may be positioned in the arched slot 60 in a double-throw configuration such that the advance rate between the first end of the guidewire 44 and the guidewire slider 50 is 2:1. In some embodiments, the barrel 24 may have a proximal medial ramp 62. In some embodiments, for example as shown in Figure 2C, in response to the movement of the catheter system 10 from a first position to a second position, the guidewire slider 50 may be lifted within the barrel 24 by the proximal medial ramp 62 so that the guidewire 44 is removed from the arched slot 60. In some embodiments, the arched slot 60 is positioned horizontally within the barrel 24, and when a portion of the guidewire slider 50 with the arched slot 60 is lifted in response to contact with the proximal medial ramp 62, gravity may facilitate the removal of the guidewire 44 from the arched slot 60. In some embodiments, when the catheter system 10 is between a first and a second position, the guidewire slider 50 may be configured to move posteriorly and anteriorly between the proximal and distal positions of the catheter hub slider. In some embodiments, after the guidewire slider 50 has moved to the distal position, the guidewire 44 is out of the arched slot 60, and therefore the guidewire 44 does not need to be retracted with respect to the introduction needle 34.
[0033] Now, referring to Figures 3A-3C, in some embodiments, the barrel 24 may be provided with a distal internal ramp 66. In some embodiments, the catheter system 10 may be configured to move from a second position to a third position, for example, as shown in Figure 3A-3C. In some embodiments, when the catheter system 10 is in the third position, the guidewire slider 50 may be positioned distally so that the guidewire 44 advances beyond the distal tip 22 of the catheter 20. In some embodiments, when the catheter system 10 is in the third position, the catheter hub slider 40 may be positioned distally advanced. In some embodiments, when the catheter system 10 is in the third position, the introduction needle 34 may extend through the catheter 20. In some embodiments, when the catheter system 10 is in the third position, the flexible arm 55 and / or fin 56 may contact the needle hub 32 to hold the spring 54 in a compressed position. Thus, in some embodiments, the introduction needle 34 may be prevented from being retracted or removed proximal before the guide wire 44 and catheter hub 12 advance distally.
[0034] In some embodiments, in response to the movement of the catheter system 10 from a first position to a second position, the distally extending arm 42 of the catheter hub slider 40 may contact the distal inner ramp 66 of the barrel 24, lifting the arm 42 distally from the groove 64 of the catheter hub 12 and disengaging the catheter hub slider 40 from the catheter hub 12. In some embodiments, the proximal end 16 of the catheter hub 12 may be provided with the groove 64.
[0035] In some embodiments, the distally extending arm 42 of the catheter hub slider 40 may be equipped with a hook 68 and / or a proximal internal projection 70 on the hook 68. In some embodiments, in response to the movement of the catheter system 10 from a second position to a third position, the distally extending arm 42 of the catheter hub slider 40 may contact a distal internal ramp 66 on the inner upper surface of the barrel 24, lifting the hook 68 from the groove 64 of the catheter hub 12 and disengaging the catheter hub slider 40 from the catheter hub 12. In some embodiments, when the hook 68 is lifted from the groove 64, the internal projection 70 remains in contact with the proximal end 16 of the catheter hub 12 so that the catheter hub slider 40 is still configured to push the catheter hub 12 distally.
[0036] Now, referring to Figures 4A-4E, in some embodiments, the distally advanced position of the catheter hub slider 40 is a partially distally advanced position. In some embodiments, the catheter system 10 may be configured to move from a third position to a fourth position, for example, as shown in Figure 4A-4D. In some embodiments, when the catheter system 10 is in the fourth position, the guidewire slider 50 may be positioned distally so that the guidewire 44 advances beyond the distal tip 22 of the catheter 20. In some embodiments, when the catheter system 10 is in the fourth position, the catheter hub slider 40 may be positioned fully distally advanced. In some embodiments, in response to the movement of the catheter system 10 from a third position to a fourth position, the catheter hub slider 40 may protrude on the flexible arm 55 so that the flexible arm 55 and / or fin 56 are disengaged from contact with the needle hub 32, and the spring 54 extends, moving the needle hub 32 proximally and housing the introduction needle 34 in the barrel 24.
[0037] In some embodiments, the catheter hub slider 40 may be configured to advance the catheter hub 12 distally, and only after the connection has been released from the catheter hub 12, the spring 54 may extend and retract the introduction needle 34 into the barrel 24, thereby preventing premature retraction of the introduction needle 34. In some embodiments, the flexible arm 55 is a first flexible arm. In some embodiments, the barrel 24 may have a second flexible arm proximal to the first flexible arm. In some embodiments, the second flexible arm 72 may have a second fin 74 tapering inward in the proximal direction. In some embodiments, for example as shown in Figure 4E, in response to the extension of the spring 54 and the proximal movement of the needle hub 32, the second flexible arm 72 may bend outward to allow the needle hub 32 to pass the second fin 74, and then bend inward to fit the needle hub 32 proximal to the second fin 74.
[0038] All examples and conditional statements set forth herein are intended for educational purposes to help readers understand the invention and the concepts provided by the inventors in order to advance the Art, and should be construed as not being limited to the examples and conditions specifically listed herein. While embodiments of the invention are described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the spirit and scope of the invention.
Claims
1. It is a catheter system, A catheter hub having a distal end, a proximal end, and lumens extending through the distal end and proximal end of the catheter hub, It has a distal tip and comprises a catheter extending from the distal end of the catheter hub, Catete assembly and A barrel with a distal end, a proximal end, a slot, and a flexible arm, A clip positioned inside the barrel, A needle hub positioned inside the barrel, An introduction needle having a sharp distal tip and a proximal tip, wherein the proximal tip of the introduction needle is fixed within the needle hub, A spring connected to the needle hub, A catheter hub slider having an arm that extends through a slot and distally, A guidewire having a first end and a second end, wherein the first end is configured to advance distally through an introduction needle, and, A guide wire slider with an extended arm that extends through a slot, A catheter system comprising, The catheter system is configured to move from a first position to a second position. When the catheter system is in the first position, The guidewire slider is positioned in the proximal position of the guidewire slider and is configured to slide along the slot to advance the guidewire from the proximal position to the distal position of the guidewire slider. The catheter hub slider is positioned proximal to the catheter hub slider. The clip connects the catheter hub to the barrel, securing the catheter hub relative to the barrel. The distal arm of the catheter hub slider is connected to the catheter hub and prevents distal and proximal movement of the catheter hub slider relative to the catheter hub. The introduction needle extends through the catheter, and then, The flexible arm contacts the needle hub and holds the spring in a compressed position. When the catheter system is in the second position, The guidewire slider is positioned distally so that the guidewire advances beyond the distal tip of the catheter. The catheter hub slider is positioned in the proximal position of the catheter hub slider. The distal arm of the catheter hub slider is connected to the catheter hub and prevents distal and proximal movement of the catheter hub slider relative to the catheter hub. The introduction needle extends through the catheter, and then, The flexible arm contacts the needle hub and holds the spring in a compressed position. In response to the movement of the catheter system from a first position to a second position, the extended arm of the guidewire slider contacts the clip and disengages the clip from the catheter hub; in response to the disengagement of the clip from the catheter hub, the catheter hub slider is configured to slide from a proximal position to a distally advanced position; and in response to sliding the catheter hub slider from a proximal position to a distally advanced position, the catheter hub may be positioned to advance distally.
2. The catheter system according to claim 1, wherein the second end of the guidewire is fixed in a barrel, and the guidewire slider has an arched slot through which it passes, and when the catheter system is in a first position, the guidewire is positioned in the arched slot in a double-throw configuration such that the advance rate between the first end of the guidewire and the guidewire slider is 2:
1.
3. The catheter system according to claim 2, wherein the arch-shaped slot is arranged horizontally within the barrel.
4. The catheter system according to claim 2, wherein the barrel is equipped with a proximal medial ramp, and in response to the movement of the catheter system from a first position to a second position, the guidewire slider is lifted within the barrel by the proximal medial ramp so that the guidewire is removed from the arched slot.
5. The catheter hub has grooves, and the barrel further has a distal medial ramp. The catheter system is configured to move from a second position to a third position. When the catheter system is in the third position, The guidewire slider is positioned in the distal position so that the guidewire advances beyond the distal tip of the catheter. The catheter hub slider is positioned distally and advanced. The introduction needle extends through the catheter, and then, The flexible arm contacts the needle hub and holds the spring in a compressed position. The catheter system according to claim 1, wherein, in response to the movement of the catheter system from a second position to a third position, the distally extending arm of the catheter hub slider contacts the distal inner ramp of the barrel, lifting the arm distally extending from the groove of the catheter hub, thereby disengaging the catheter hub slider from the catheter hub.
6. The barrel further includes a distal medial ramp, and the distal arm of the catheter hub slider has a hook and a proximal medial projection to the hook. In response to the movement of the catheter system from the second to the third position, the distal arm of the catheter hub slider contacts the distal inner ramp on the distal inner surface of the barrel, lifting the hook from the groove of the catheter hub and disengaging the catheter hub slider from the catheter hub. The catheter system of claim 5, wherein when the hook is lifted out of the groove, the internal projection remains in contact with the proximal end of the catheter hub, such that the catheter hub slider is configured to push the catheter hub distally.
7. The proximal end of the catheter hub is provided with a groove, the distal advance position of the catheter hub slider is a partially distal advance position, and the catheter system is configured to move from a third position to a fourth position, and when the catheter system is in the fourth position, The guidewire slider is positioned in the distal position so that the guidewire advances beyond the distal tip of the catheter, and, The catheter hub slider is positioned fully distally advanced. The catheter system according to claim 5, wherein, in response to the movement of the catheter system from a third position to a fourth position, the catheter hub slider protrudes on a flexible arm, the flexible arm is disengaged from contact with the needle hub, and a spring extends, moving the needle hub proximally and retracting the introduction needle into the barrel.
8. The flexible arm has fins that taper inward in the distal direction. The catheter system according to claim 7, wherein, in response to the movement of the catheter system from a third position to a fourth position, the catheter hub slider protrudes on the fin, the flexible arm is disengaged from contact with the needle hub, and the spring extends, moving the needle hub proximally and retracting the introduction needle into the barrel.
9. The flexible arm is a first flexible arm, and the barrel has a second flexible arm proximal to the first flexible arm, and the second flexible arm has a second fin that tapers inward in the proximal direction. The catheter system according to claim 1, wherein in response to the extension of the spring which moves the needle hub proximally, the second flexible arm deflects outward to allow the needle hub to pass through the second fin, and then bends inward to fit the needle hub proximally to the second fin.
10. The catheter system according to claim 1, wherein the guidewire slider is configured to move backward and forward when the catheter system is between a first position and a second position.
11. The catheter system according to claim 1, wherein when the catheter system is in the first position, the guidewire slider is located above the catheter hub slider.
12. The catheter system according to claim 11, wherein the proximal end of the catheter hub slider is provided with a tab to prevent the catheter hub slider from sliding proximal to the tab.
13. It is a catheter system, A catheter hub having a distal end, a proximal end, and lumens extending through the distal end and proximal end of the catheter hub, A catheter assembly comprising a catheter having a distal tip and extending from the distal tip of a catheter hub, A barrel with a distal end, a proximal end, and slots, A clip positioned inside the barrel, A needle hub positioned inside the barrel, An introduction needle having a sharp distal tip and a proximal tip, wherein the proximal tip of the introduction needle is fixed within the needle hub, The catheter hub slider extends through the slot and is configured to slide along the slot from the proximal position to the distal advancement position. A guidewire having a first end and a second end, wherein the first end is configured to advance distally through an introduction needle, and, A guidewire slider configured to extend through a slot and slide along the slot to advance the guidewire from a proximal position to a distal position of the guidewire slider, wherein when the guidewire slider is in the proximal position, the catheter hub slider is prevented from sliding along the slot from the proximal position to the distal position of the guidewire slider. A catheter system equipped with [a specific feature / feature].
14. The catheter assembly includes a spring connected to the needle hub, and the barrel further includes a flexible arm. When the catheter system is in a first position, the flexible arm contacts the needle hub and holds the spring in a compressed position. The catheter system of claim 13, wherein the spring is configured to extend only after the catheter hub slider advances the catheter hub distally and disconnects it from the catheter hub, and to house the introduction needle in the barrel.
15. The catheter hub slider has an arm that extends distally, The catheter system is configured to move from a first position to a second position. When the catheter system is in the first position, The guidewire slider is positioned in the proximal position of the guidewire slider. The catheter hub slider is positioned proximal to the catheter hub slider. The clip connects the catheter hub to the barrel, securing the catheter hub relative to the barrel. The distal arm of the catheter hub slider is connected to the catheter hub and prevents distal and proximal movement of the catheter hub slider with respect to the catheter hub, and, The introduction needle extends through the catheter. When the catheter system is in the second position, The guidewire slider is positioned distally so that the guidewire advances beyond the distal tip of the catheter. The catheter hub slider is positioned in the proximal position of the catheter hub slider. The distal arm of the catheter hub slider is connected to the catheter hub and prevents distal and proximal movement of the catheter hub slider relative to the catheter hub. The introduction needle extends through the catheter, and then, The flexible arm contacts the needle hub and holds the spring in a compressed position. In response to the movement of the catheter system from the first position to the second position, the extended arm of the guidewire slider contacts the clip, disengaging the clip from the catheter hub. In response to the release of the clip from the catheter hub, the catheter hub slider is configured to slide from the proximal position to the distal advancement position. In response to sliding the catheter hub slider from the proximal position to the distal advancement position, the catheter hub may be configured to advance distally. The catheter system according to claim 13.
16. The catheter system of claim 13, wherein the second end of the guidewire is fixed within the barrel, and the guidewire slider has an arched slot through which it passes, and when the catheter system is in a first position, the guidewire is positioned in the arched slot in a double-throw configuration such that the advance rate between the first end of the guidewire and the guidewire slider is 2:
1.
17. The catheter system according to claim 16, wherein the arch-shaped slot is arranged horizontally within the barrel.
18. The catheter system according to claim 13, wherein the barrel is equipped with a proximal medial ramp, and in response to the movement of the catheter system from a first position to a second position, the guidewire slider is lifted within the barrel by the proximal medial ramp so that the guidewire is removed from the arched slot.
19. The catheter hub slider has an arm that extends distally, the catheter hub has a groove, and the barrel further has a distal medial ramp. The catheter system is configured to move from a second position to a third position. When the catheter system is in the third position, The guidewire slider is positioned in the distal position so that the guidewire advances beyond the distal tip of the catheter. The catheter hub slider is positioned distally and advanced. The introduction needle extends through the catheter, and then, The flexible arm contacts the needle hub and holds the spring in a compressed position. The catheter system according to claim 13, wherein, in response to the movement of the catheter system from a second position to a third position, the distally extending arm of the catheter hub slider contacts the distal inner ramp of the barrel, lifting the arm distally extending from the groove of the catheter hub, thereby disengaging the catheter hub slider from the catheter hub.
20. The proximal end of the catheter hub is equipped with a groove. The distal advancement position of the catheter hub slider is a partial distal advancement position, and the catheter system is configured to move from the third position to the fourth position. When the catheter system is in the fourth position, the guidewire slider is positioned in the distal position so that the guidewire advances beyond the distal tip of the catheter, and, The catheter hub slider is positioned fully distally advanced. The catheter system according to claim 19, wherein, in response to the movement of the catheter system from a third position to a fourth position, the catheter hub slider protrudes on a flexible arm, the flexible arm is disengaged from contact with the needle hub, and a spring extends, moving the needle hub proximally and retracting the introduction needle into the barrel.