COVER TO REDUCE CONTACT OF A CATHETER AND RELATED SYSTEMS DURING INSERTION

Abstract

A catheter system includes a catheter assembly (12) and a needle assembly (40). The catheter assembly includes a catheter hub (14) and a catheter (22) extending distally from the distal end (16) of the catheter hub. The catheter assembly includes a cover (24) attached to a proximal portion (18) of the catheter hub. The cover is configured to reduce contact with the catheter assembly during initial insertion of the catheter assembly into a patient's vasculature and / or threading of the catheter, which could reduce the risk of bacterial contamination of the catheter. The needle assembly includes an introducer needle (42), a housing (48), and a needle hub (52) positioned within the housing. The housing includes a button (50). The proximal end (46) of the introducer needle is secured within the needle hub. In response to activation of the button, the needle hub and introducer needle move proximally within the housing.

Description

COVER TO REDUCE CONTACT BETWEEN A CATHETER AND RELATED SYSTEMS DURING INSERTION LACAnn / zznz / E / YiAi Background of the Invention Catheters are commonly used for a variety of infusion therapies. For example, catheters can be used to infuse fluids, such as normal saline, various medications, and total parenteral nutrition, into a patient. Catheters can also be used to draw blood from the patient. A common type of catheter is a peripheral intravenous (IV) over-the-needle catheter. As the name implies, the over-the-needle catheter can be mounted on an introducer needle with a sharp distal tip. A catheter assembly may include a catheter hub, the catheter extending distally from the hub, and the introducer needle extending through the catheter. The catheter and introducer needle can be assembled so that the distal tip of the introducer needle extends beyond the distal tip of the catheter, with the bevel of the needle facing upward, away from the patient's skin. The catheter and introducer needle are typically inserted at a shallow angle through the skin into the patient's vasculature. To verify proper placement of the introducer needle and / or catheter in the blood vessel, a user Ref. 336726 generally confirms that there is blood backflow in a backflow chamber of the catheter assembly. Once needle placement has been confirmed, the user can temporarily occlude flow in the vasculature and withdraw the needle, leaving the catheter in place for future blood draws or fluid infusions. During catheter insertion into the patient's vasculature, the user makes contact with and pushes the catheter hub, which can contaminate the hub with bacteria and lead to bacterial contamination of the catheter. Bacterial contamination of the catheter can increase the patient's risk of hospital-acquired infection. The related issue claimed herein is not limited to modalities that resolve a disadvantage or that operate only in environments such as those described above. Rather, this background is provided only to illustrate an example technology area where some of the implementations described herein can be practiced. Brief Description of the Invention This description relates generally to a vascular access system, as well as related devices and methods. More specifically, in some modalities, this description relates to a cover for a catheter hub of a catheter assembly. In some modalities, a user can grasp the cover instead of the catheter hub during catheter insertion into a patient's vasculature, which may reduce the risk of bacterial contamination of the catheter and / or hospital-acquired infection. In some modalities, the cover may facilitate contactless catheter insertion or catheter insertion without the user touching the catheter hub. In some modalities, a catheter system may include a catheter assembly. In some modalities, the catheter assembly may include a catheter hub, which may include a distal end, a proximal end, and a lumen extending through the distal end of the catheter hub and the proximal end of the catheter hub. In some modalities, the catheter assembly may include a catheter extending distally from the distal end of the catheter hub. In some designs, the catheter system may include a cover, which may be attached to a proximal portion of the catheter hub. In some designs, the cover may include a push tab and / or a groove. In some designs, the groove may extend parallel to a longitudinal axis of the catheter system. In some designs, the catheter system may include an extension, which may include a distal and a proximal end. In some designs, the distal end of the extension may slide relative to the groove. In some models, the catheter system may include a needle assembly, which may include an introducer needle. In some models, the introducer needle may include a distal tip and a proximal end. In some models, the needle assembly may include a housing, which may include an active safety mechanism. In some models, the active safety mechanism may include a button. In some models, the needle assembly may include a needle connector disposed within the housing. In some models, the proximal end of the introducer needle may be secured within the needle hub. In some models, the proximal end of the extension may be attached to the needle hub. In some models, in response to button activation, the cover can be pulled proximally and removed from the proximal portion of the catheter hub. In some models, the extension may include a strap. In some models, the extension may include a spring. In some models, in response to button activation, the needle hub may move proximally within the housing, and a portion of the introducer needle may be positioned within the housing. In some models, in response to the user releasing the cover, the spring may retract, and the cover may move close to the housing and protect the distal tip of the introducer needle. In some LACAnn / zznz / E / YiAi modalities, the extension can be rigid. In some models, the cover may include a proximal extension that covers at least part of the button to prevent premature button activation. In some models, an outer surface of the cover may include one or more protrusions to facilitate gripping by the user. In some models, the catheter hub may include a push tab. In some models, a distal end of the cover may be adjacent to the push tab. In some models, a distal end of the cover may include an arm, which may extend distally along one side of the catheter hub. In some models, the arm may include part of the groove. In some modalities, the method may include inserting the catheter system into the patient's vasculature. In some modalities, the method may include threading the catheter, which may involve contacting and applying force distal to the sheath to advance the catheter distally relative to the introducer needle. In some modalities, the extension may include the spring, and in response to button activation, a portion of the introducer needle may be deployed within the housing. In these and other modalities, the method may include releasing the sheath. In some In some modalities, in response to the release of the cover, the cover may move close to the housing and protect the distal tip of the introducer needle. In some modalities, before threading the catheter, the method may include rotating the cover, which can turn toward the catheter hub to break the adhesion between the introducer needle and the catheter. It should be understood that both the preceding general description and the following detailed description are illustrative and explanatory, and not restrictive. It should also be understood that the various modalities are not limited to the arrangements and instruments shown in the figures. Furthermore, it should be understood that the modalities may be combined, or that other modalities may be used, and that structural changes may be made, unless otherwise claimed, without departing from the scope of the various modalities described herein. The following detailed description should therefore not be taken in a limiting sense. Brief Description of the Figures The example modalities will be described and explained with additional specificity and detail through the use of the accompanying figures. Figure 1I is a top perspective view of an example catheter system, illustrating the catheter system in an example insertion configuration and cover, according to some modalities; LACAnn / zznz / E / YiAi Figure IB is a top perspective view of the catheter system, illustrating an example of a catheter partially unscrewed from an example introducer needle, according to some modalities; Figure 1C is a side view of the catheter system in the insertion configuration with the cover of Figure 1A and an example extension removed for illustrative purposes, according to some modalities; Figure ID is a cross-sectional view of the catheter system, illustrating the catheter system in the insertion configuration, according to some modalities; Figure 2A is a top perspective view of the lid of Figure 1A, illustrating a proximal end of the cover of Figure 1A with an example extension removed, according to some modalities; Figure 2B is a top perspective view of the cover of Figure 1A, illustrating a distal end of the cover of Figure 1A with the extension removed, according to some modalities; Figure 3A is a top perspective view of the catheter system, illustrating another example cover and catheter system in the insertion configuration, according to some modalities; Figure 3B is a top perspective view of the catheter system, illustrating the cover of Figure 3A and LACAnn / zznz / E / YiAi the catheter partially unscrewed from the introducer needle, according to some modalities; Figure 4A is a top perspective view of the catheter system, illustrating another example cover and catheter system in the insertion configuration, according to some modalities; Figure 4B is a top perspective view of the catheter system, illustrating the cover of Figure 4A and the catheter partially unscrewed from the introducer needle, according to some modalities; Figure 5A is a side view of the catheter system, illustrating another example cover and another example extension, and the catheter system in the insertion configuration, according to some modalities; Figure 5B is a side view of the catheter system, illustrating the cover and extension of Figure 5A and the catheter partially unscrewed from the introducer needle, according to some modalities; Figure 5C is a side view of the catheter system, illustrating the cover and extension of Figure 5A near an example housing and protecting a distal tip of the introducer needle; Figure 6A is a side view of the catheter system, illustrating another example cover and another example extension, and the catheter system in the configuration of LACAnn / zznz / E / YiAi insertion, according to some modalities; Figure 6B is a side view of the catheter system, illustrating the cover and extension of Figure 6A and the catheter partially unscrewed from the introducer needle, according to some modalities; Figure 6C is a side view of the catheter system, illustrating the cover and extension of Figure 6A near an example housing and protecting a distal tip of the introducer needle; Figure 7A is a side view of the catheter system, illustrating an example cover and the catheter system in the insertion configuration, according to some embodiments; and Figure 7B is a side view of the catheter system of Figure 7A, illustrating the cover of Figure 7A and the catheter partially unscrewed from the introducer needle, according to some embodiments. Detailed Description of the Invention With reference now to Figures 1A-1D, in some modalities, a catheter system 10 may include a catheter assembly 12. In some modalities, the catheter assembly 12 may include a catheter hub 14, which may include a distal end 16, a proximal end 18, and a lumen 20 extending through the distal end 16 of the catheter hub 14 and the proximal end 18 of the catheter hub 14. In some In some modalities, the catheter assembly 12 may include a catheter 22 extending distally from the distal end 16 of the catheter hub 14. In some modalities, the catheter 22 may be secured within the distal end 16 of the catheter hub 14. In some modalities, the catheter 22 may include a peripheral intravenous catheter, a peripherally inserted central catheter, or a midline catheter. In some embodiments, the catheter system 10 may include a cover 24, which can be coupled to a proximal portion 26 of the catheter hub 14. In some embodiments, the cover 24 may include a push tab 28 and / or a groove 30. In some embodiments, the push tab 28 can extend outward from a body of the cover 24. In some embodiments, the groove 30 can extend parallel to a longitudinal axis 32 of the catheter system 10. In some embodiments, the catheter system 10 may include an extension 34, which can include a distal end 36 and a proximal end 38. In some embodiments, the distal end 36 of the extension 34 can slide relative to the groove 30. In some embodiments, the proximal end 38 of the extension 34 can be coupled to the needle hub 52. In some modalities, a user may grasp the cover 24 instead of the catheter hub 14 during catheter insertion 22 into a patient's vasculature, which may reduce the risk of bacterial contamination of the LACAnn / zznz / E / YiAi catheter 22 and / or hospital-acquired infection. In some modalities, the cover 24 may facilitate touchless insertion of catheter 22 (insertion of catheter 22 without the user touching the catheter hub 14) or reduced-touch insertion of catheter 22. In some modalities, the catheter system 10 may include a needle assembly 40, which may include an introducer needle 42. In some modalities, the introducer needle 42 may include a distal tip 44 and a proximal end 46. In some modalities, the needle assembly 40 may include a housing 48, which may include an active safety mechanism. In some modalities, the active safety mechanism may include a button 50. In some modalities, the needle assembly 40 may include a needle hub 52 disposed within the housing 48. In some modalities, the proximal end 46 of the introducer needle 42 may be secured within the needle hub 52. In some embodiments, the distal end 36 of extension 34 can be attached to cover 24 in several ways. In some embodiments, the distal end 36 may include a tab 54, which can extend through slot 30 and may include an outer portion with a diameter larger than slot 30. In some embodiments, tab 54 can slide relative to slot 30. In some embodiments, the proximal end 38 of extension 34 can LACAnn / zznz / E / YiAi can be attached to the needle hub 52 in several ways. In some modalities, the proximal end 38 can be secured within a wall of the needle hub 52. In some modalities, the proximal end 38 can be embedded within the wall of the needle hub 52. In some modalities, the proximal end 38 can be attached in an interference fit with the wall of the needle hub 52 or another suitable fit. In some modalities, the proximal end 38 can be attached to the needle hub 52 via an adhesive, solvent, or other suitable means. In some modalities, extension 34 may extend proximally into orifice 56. In some modalities, the proximal end 38 may include a larger diameter than orifice 56, so that the proximal end 38 is prevented from moving distally into orifice 56 and is secured within the needle hub 52. As illustrated in Figures 1A-1D, in some modalities, extension 34 may be rigid. In some modalities, in response to the catheter system 10 being in an insertion configuration, illustrated, for example, in Figures 1A and 1ID, the catheter system 10 may be inserted into the patient's vasculature. In some modalities, the catheter hub 14 may include a push tab 55. In some modalities, a distal end of the cover 24 may be close to the push tab 55 when the catheter system 10 is in the insertion configuration. LACAnn / zznz / E / YiAi Insertion. In some modalities, in response to the insertion of the introducer needle 42 and / or catheter 22 into the vasculature, the catheter 22 may partially unscrew from the introducer needle 42. This may involve contact with and application of force in a distal direction to the cover 24 to advance the catheter 22 distally relative to the introducer needle 42. Figure IB illustrates the catheter 22 partially unscrewed from the introducer needle 42, according to some modalities. In some modalities, in response to the catheter 22 partially unscrewing from the introducer needle 42, the catheter 22 may extend or screw into the vasculature before the introducer needle 42 is retracted by the active safety mechanism. In some modalities, screwing the catheter 22 into the vasculature may increase the likelihood that the catheter 22 will be correctly positioned within the vasculature. In some embodiments, housing 48 may include a cylinder. In some embodiments, the active safety mechanism may include a spring 57 disposed within housing 48 and a projection 58. In some embodiments, the button 50 may include or correspond to an activation latch. In some embodiments, housing 48 may include a distal end 60 and a proximal end 62. In some embodiments, the needle hub 52 may be slidably disposed in housing 48, which may LACAnn / zznz / E / YiAi is generally hollow. In some modalities, the spring 57 may be arranged around the introducer needle 42 and / or between the needle hub 52 and the distal end 60 of the housing 48. In some embodiments, the button 50 may include an upper portion 64 and a lower portion 66. In some embodiments, the button 50 may be movably mounted adjacent to the distal end 60 of the housing 48. In some embodiments, the button 50 may be adapted for selective coupling with the needle hub 52 to hold the needle hub 52 adjacent to the distal end 60 of the housing 48 against the spring load 57, so that the introducer needle 42 extends beyond the distal end 60 of the housing 48 and through the catheter 22. In some modalities, projection 58 may be positioned within the proximal end 18 of the catheter hub 14 to prevent movement of button 50 when the catheter hub 14 is adjacent to the distal end 60 of the housing 48. In some modalities, projection 58 may be positioned adjacent to the lower portion 66 of button 50. In some modalities, projection 58 may extend from button 50 to engage with the catheter hub 14 to prevent movement of button 50 when the catheter hub 14 is adjacent to the distal end 60 of the housing 48, as illustrated, for example, in Figure ID. In some modalities, LACAnn / zznz / E / YiAi projection 58 can extend towards the distal end 16 of the catheter hub 14. In some embodiments, button 50 may extend within housing 48 through a slot 68, which may be formed in housing 48 adjacent to the distal end 60. In some embodiments, button 50 may include an opening 70, and the distal end 60 of housing 48 may include an opening 72. In some embodiments, opening 70 and opening 72 may allow the introducer needle 42 and needle hub 52 to extend through button 50 and the distal end 60 of housing 48. In some embodiments, when button 50 is raised in an unactivated position, as illustrated, for example, in Figure 10, the projection 58 may engage the needle hub 52 and hold the needle hub 52 adjacent to the distal end 60 of housing 48 against the spring force 57.In some models, the hub of needle 52 may include a generally hourglass shape, such that its middle portion has a smaller diameter than either end. This shape can facilitate the coupling between projection 58 and the hub of needle 52. In some modalities, when button 50 is in the unactuated position, projection 58 may be located within the catheter hub 14. Therefore, when the catheter system 10 is in the insertion configuration and the needle LACAnn / zznz / E / YiAi introducer 42 extends through catheter 22, projection 58 can prevent button 50 from moving down to an activated position. In some embodiments, the length of projection 58 may vary. In some embodiments, a length of projection 58 may be sufficient to allow projection 58 to engage with the catheter hub 14 when the catheter hub 14 is adjacent to the distal end 60 of the housing 48. In some embodiments, the length of projection 58 may not be so long as to interfere with the use of catheter 22 and introducer needle 42. In some embodiments, the active safety mechanism is described in more detail in U.S. Patent No. 5,501,675, which is incorporated herein by reference in its entirety. In some modalities, in response to the catheter 22 partially unscrewing from the introducer needle 42 as the catheter 22 is advanced distally relative to the introducer needle 42, the catheter hub 14 may not be adjacent to the distal end 60 of the housing 48. In these and other modalities, button 50 can be moved downward, i.e., activated, because the catheter hub 14 no longer interferes with the movement of the projection 58. In this position, the projection 58 can no longer engage the needle hub 52. In some modalities, when button 50 is activated, the diameter of the opening 72 may increase. In some modalities, when button 50 is activated, the openings 70 and 72 may be larger than the maximum diameter of the needle hub 52.In some embodiments, the spring 57 can force the needle hub 52 towards the proximal end 62 of the housing 48 and withdraw the distal tip 44 of the introducer needle 42 into the housing 48, protecting the distal tip 44 and protecting the user and / or patient from accidental needle sticking. Figure IB illustrates the distal advancement of the catheter hub 14 and catheter 22 relative to housing 48 before button 50 is activated, according to some modalities. In some modalities, as illustrated, for example, in Figure IB, the user can distally advance the catheter hub 14 and catheter 22 or partially unscrew catheter 22 from the introducer needle 42 after the user observes blood reflux. In some modalities, the user can touch or hold the catheter cover but not connector 14 to distally advance the catheter connector 14 and catheter 22. In some modalities, after the catheter connector 14 has been distally advanced, the user can press button 50, which can retract the introducer needle 42 into housing 48.In some modalities, in response to button 50 activation, cover 24 can be pulled proximally and removed from the proximal portion 26 of the catheter hub 14. LACAnn / zznz / E / YiAi operation. In some modalities, a distal end of the cover 80 may include an arm 82, which may extend distally along one side of the catheter hub 14. In some modalities, the arm 82 may include at least a portion of the slot 30. With reference to Figures 5A-5C, a cover 84 and an extension 86 are illustrated, according to certain embodiments. In some embodiments, cover 84 may be similar or identical to one or more of the following in terms of one or more features and / or functions: cover 24 of Figures 1A-2B, cover 76 of Figures 3A-3B, and cover 80 of Figures 4A-4B. In some embodiments, extension 86 may be similar or identical to extension 34 of Figures 1A-4B. In some embodiments, extension 86 may include a spring. In some embodiments, a proximal end of extension 86 may be coupled to housing 48, and a distal end of extension 86 may be coupled to cover 84. In some modalities, in response to activation of button 50, the needle hub 52 may move proximally within housing 48 and a portion of the introducer needle 42 may be positioned within housing 48. In some modalities, in response to activation of button 50, the needle hub 52 may move proximally within housing 48, and the distal tip 44 of the introducer needle LACAnn / zznz / E / YiAi may be distal to housing 48. In some modalities, in response to the release of cover 84 by the user, the spring may contract, and cover 84 may move close to housing 48 and protect the distal tip 44 of the introducer needle 42. In these and other modalities, barrel 48 may be shortened. With reference to Figures 6A-6B, a cover 88 and an extension 90 are illustrated, according to certain embodiments. In some embodiments, cover 88 may be similar or identical to one or more of the following in terms of one or more features and / or functions: cover 24 of Figures 1A-2B, cover 76 of Figures 3A-3B, cover 80 of Figures 4A-4B, and cover 84 of Figures 5A-5C. In some embodiments, extension 86 may be similar or identical to extension 34 of Figures 1A-4B and / or extension 86 of Figures 5A-5C. In some embodiments, extension 34 may include a strap. In some embodiments, the strap may include any suitable strap. In some embodiments, the strap may be accordion-folded. With reference now to Figures 7A-7B, in some embodiments, an outer surface of a cover 92 may include one or more projections 94 to facilitate the user's grip on the cover 92. In these and other embodiments, the user can manually remove the cover. LACAnn / zznz / E / YiAi after partially unscrewing catheter 22 from introducer needle 42 and screwing catheter 22 into the vasculature. In some modalities, cover 92 may be similar or identical to one or more of the following in terms of one or more features and / or function: cover 24 in Figures 1A-2B, cover 76 in Figures 3A-3B, cover 80 in Figures 4A-4B, cover 84 in Figures 5A-5C, and the cover in Figures 6A-6B. All examples and conditional language mentioned herein are intended for pedagogical purposes to assist the reader in understanding the present description and the concepts contributed by the inventor to further the technique, and should be interpreted without limitation to such examples and conditions specifically listed. Although the modalities of the present description have been described in detail, it should be understood that various changes, substitutions, and alterations may be made without departing from the spirit and scope of the present description. It is hereby stated that, as of this date, the best method known to the applicant for putting the aforementioned invention into practice is the one that is clear from the present description of the invention.

Claims

1. Catheter system, characterized in that it comprises: a catheter assembly, comprising: a catheter hub, comprising a distal end, a proximal end, and a lumen extending through the distal end of the catheter hub and the proximal end of the catheter hub; and a catheter extending distally from the distal end of the catheter hub; a needle assembly, comprising: an introducer needle, comprising a distal tip and a proximal end; a housing comprising a button; and a needle hub disposed within the housing, wherein a proximal end of the introducer needle is secured within the needle hub; wherein in response to activation of the button, the needle hub and the introducer needle move proximally within the housing;a cover attached to a proximal portion of the catheter hub, wherein the cover comprises a push tab and a groove, wherein the groove extends parallel to a longitudinal axis of the catheter system; and an extension, comprising a distal end and a proximal end, wherein the distal end of the extension can slide relative to the groove, wherein the proximal end of the extension is attached to the needle hub.

2. The catheter system according to claim 1, characterized in that in response to the activation of the button, the cover is pulled proximally and removed from the proximal part of the catheter hub.

3. The catheter system according to claim 1, characterized in that the extension comprises a strap.

4. The catheter system according to claim 1, characterized in that the extension comprises a spring.

5. The catheter system according to claim 1, characterized in that the extension is rigid.

6. The catheter system according to claim 1, characterized in that the cover comprises a proximal extension that covers at least a portion of the button to prevent premature activation of the button.

7. The catheter system according to claim 1, characterized in that the catheter hub comprises a push tab, wherein a distal end of the cover is close to the push tab.

8. The catheter system according to LACAnn / zznz / E / YiAi claim 1, characterized in that a distal end of the cover comprises an arm extending distally along one side of the catheter hub, wherein the arm comprises a portion of the groove.

9. The catheter system according to claim 8, characterized in that the catheter hub comprises a push tab, wherein the arm extends distal to the push tab.

10. Catheter system, characterized in that it comprises: a catheter assembly, comprising: a catheter hub, comprising a distal end, a proximal end, and a lumen extending through the distal end of the catheter hub and the proximal end of the catheter hub; and a catheter extending distally from the distal end of the catheter hub; and a needle assembly, comprising: an introducer needle, comprising a distal tip and a proximal end; a housing comprising a button; and a needle hub disposed within the housing, wherein a proximal end of the introducer needle is secured within the needle hub; wherein, in response to activation of the button, the needle hub and the introducer needle move proximally within the housing; and a cover attached to a proximal portion of the catheter hub, wherein the cover comprises a push tab.

11. The catheter system according to claim 10, characterized in that the cover comprises a proximal extension that covers at least a portion of the button to prevent premature activation of the button.

12. The catheter system according to claim 10, characterized in that an outer surface of the cover comprises a plurality of projections to facilitate the user's grip of the cover.

13. The catheter system according to claim 10, characterized in that it further comprises an extension, wherein the extension comprises a distal end and a proximal end, wherein the distal end is coupled to the cover, wherein the proximal end is coupled to the needle hub, and wherein the extension comprises a spring.

14. The catheter system according to claim 13, characterized in that in response to the activation of the button, the needle hub moves proximally within the housing and a portion of the introducer needle is disposed within the housing, wherein, in response to the release of the cover by the user, the spring contracts and the cover moves close to the housing and protects the distal tip of the introducer needle.

15. A method for reducing contact with a LACAnn / zznz / E / YiAi catheter assembly, characterized in that it comprises: inserting a catheter system into the vasculature of a patient, wherein the catheter system comprises: a catheter assembly, comprising: a catheter hub, comprising a distal end, a proximal end, and a lumen extending through the distal end of the catheter hub and the proximal end of the catheter hub; and a catheter extending distally from the distal end of the catheter hub; a needle assembly, comprising: an introducer needle, comprising a distal tip and a proximal end, a housing comprising a button; and a needle hub disposed within the housing, wherein the proximal end of the introducer needle is secured within the needle hub; wherein, in response to activation of the button, the needle hub and the introducer needle move proximally within the housing;and a cover attached to a proximal portion of the catheter hub, wherein the cover comprises a push tab; and screwing the catheter, comprising contacting and applying a force in a distal direction to the cover to advance the catheter distally with respect to the LACAnn / zznz / E / YiAi 27 introducer needle.

16. The method according to claim 15, characterized in that the cover comprises a push tab and a groove, wherein the groove extends parallel to a longitudinal axis of the catheter system, wherein the catheter system further comprises an extension comprising a distal end and a proximal end, wherein the distal end of the extension is slidable with respect to the groove, wherein the proximal end is coupled to the needle hub, further comprising activating the button after screwing on the catheter, wherein, in response to the activation of the button, the cover is withdrawn from the proximal portion of the catheter hub.

17. The method according to claim 15, characterized in that the extension comprises a strap or a spring.

18. The method according to claim 15, characterized in that the extension is rich.

19. The method according to claim 15, characterized in that the catheter system further comprises an extension, wherein the extension comprises a distal end and a proximal end, wherein the distal end is coupled to the cover, wherein the proximal end is coupled to the needle hub, wherein the extension comprises a spring, wherein, in response to the activation of the button, a portion of the introducer needle is disposed within the housing, further comprising the release of the cover, wherein, in response to the release of the cover, the cover moves close to the housing and protects the distal tip of the introducer needle.

20. The method according to claim 15, characterized in that it further comprises, before screwing on the catheter, twisting the cover to break the adhesion between the introducer needle and the catheter.

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