CATHETER SYSTEM HAVING LOCKING CAP
The catheter system with a lock cap mechanism addresses the issue of lost hole plugs by securely attaching the cap to the adapter, maintaining sterility and preventing contamination.
Patent Information
- Application Number
- JP2024544401
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-12-06
- Filing Date
- 2022-12-08
- Publication Date
- 2025-01-30
AI Technical Summary
Catheter adapters often lose their hole plugs during transport or use, leading to potential contamination and loss of sterility.
A catheter system with a lock cap mechanism that includes a cap with protrusions and slots, which secure the cap to a female luer adapter, preventing accidental removal and maintaining sterility.
The lock cap system effectively secures the cap to the adapter, preventing accidental removal and maintaining a sterile environment, thus ensuring the catheter's integrity and safety.
Smart Images
Figure 2025503174000001_ABST
Abstract
Description
[Technical field]
[0001] Common types of catheter assemblies include over-the-needle peripheral intravenous catheters ("PIVCs"). As the name suggests, over-the-needle PIVCs may be mounted over an introducer needle that has a sharp distal tip. The catheter assembly may include a catheter adapter, a PIVC that extends distally from the catheter adapter, and an introducer needle that extends through the PIVC. The PIVC and introducer needle may be assembled such that the distal tip of the introducer needle extends beyond the distal tip of the PIVC and the bevel of the needle points up and away from the patient's skin just prior to insertion into the skin. The PIVC and introducer needle are generally inserted at a shallow angle through the skin into the patient's vasculature. [Background technology]
[0002] To confirm proper placement of the introducer needle and / or PIVC within the blood vessel, the practitioner may observe the presence of blood flashback in the flashback chamber of the catheter assembly. In some cases, blood may progress into the introducer needle, exit the introducer needle's flashback notch, and reach the flashback chamber where blood is visible to the practitioner. Once placement of the introducer needle is confirmed by observation of blood, the practitioner may remove the introducer needle and leave the PIVC in place within the blood vessel for future blood withdrawals or infusions. Summary of the Invention [Problem to be solved by the invention]
[0003] Catheter assemblies often include a Luer adapter and a vent plug disposed within the Luer adapter. The vent plug provides protection for the Luer adapter and catheter assembly to prevent objects from entering the Luer adapter and to maintain a sterile environment within the catheter assembly. However, the vent plug often becomes dislodged from the Luer adapter during shipping or transportation of the catheter assembly, which results in loss of product integrity and rejection of the catheter assembly due to potential contamination.
[0004] The subject matter claimed herein is not limited to embodiments that solve the shortcomings or that operate only in environments such as those described above. Rather, this background is only provided to illustrate one example technology area where some embodiments described herein may be practiced.
[0005] The present disclosure relates generally to a catheter system including a locking cap, as well as related devices and methods. In some embodiments, the catheter system may include a catheter and a female luer adapter. In some embodiments, the female luer adapter may include a proximal end and a distal end, and the proximal end of the female luer adapter may include a first prong and a second prong. In some embodiments, the female luer adapter may be in fluid communication with the catheter.
[0006] In some embodiments, the catheter system may include a cap, which may include a top. In some embodiments, the cap may include a male luer extending from the top to the distal end for insertion into the proximal end of the female luer adapter. In some embodiments, the cap may include a first arm extending from the top to the distal end. In some embodiments, the first arm may include a first slot. In some embodiments, the cap may include a second arm extending from the top to the distal end. In some embodiments, the second arm may include a second slot. In some embodiments, the first protrusion may be disposed within the first slot and the second protrusion may be disposed within the second slot. In these embodiments, the cap, sometimes referred to in this disclosure as a "locking cap," may be disposed in a locked position.
[0007] In some embodiments, in response to rotation of the cap relative to the female luer adaptor in a first direction, the first protrusion may be configured to press against an end of the first slot and the second protrusion may be configured to press against an end of the second slot to prevent further rotation of the cap in the first direction. In some embodiments, in response to rotation of the cap relative to the female luer adaptor in a second direction opposite the first direction, the first protrusion may be configured to be removed from the first slot and the second protrusion may be configured to be removed from the second slot.
[0008] In some embodiments, the first slot may include another longitudinal edge opposite the longitudinal edge. In some embodiments, the longitudinal edge of the first slot and / or the other longitudinal edge may include a first bump. In some embodiments, the first bump may interfere with the first protrusion to resist rotation of the cap in the second direction. In some embodiments, the longitudinal edge of the first slot and / or the other longitudinal edge may be angled at the same angle as the first protrusion.
[0009] In some embodiments, the second slot may include another longitudinal edge opposite the longitudinal edge. In some embodiments, the longitudinal edge of the second slot and / or the other longitudinal edge may include a second bump. In some embodiments, the second bump may interfere with the second protrusion to resist rotation of the cap in the second direction. In some embodiments, the longitudinal edge of the second slot and / or the other longitudinal edge may be angled at the same angle as the second protrusion.
[0010] In some embodiments, the first protrusion may be opposite the second protrusion. In some embodiments, the first slot may be disposed on the same side as the first arm when the second slot is disposed on the second arm. In some embodiments, the proximal end of the female luer adapter may include a threaded portion, and the first protrusion and the second protrusion may be disposed on the threaded portion. In some embodiments, the first direction may be clockwise and the second direction may be counterclockwise when viewed at the distal end.
[0011] In some embodiments, the cap may include one or more through holes disposed on an outer surface of the male luer. In some embodiments, the one or more through holes may be sized and configured to allow air to pass therethrough but not liquid. In some embodiments, the one or more through holes may extend out from the female luer adapter. In some embodiments, the terminal end of the first arm may be chamfered and the terminal end of the second arm may be chamfered.
[0012] In some embodiments, the first arm may be spaced from the second arm by a gap and another gap opposite the gap. In some embodiments, the first protrusion may be configured to be disposed within the gap, the second protrusion may be configured to be disposed within the other gap, and the cap may be configured to be removed from the female luer adaptor in response to rotation of the cap relative to the female luer adaptor in a second direction opposite the first direction and removal of the first protrusion from the first slot and the second protrusion from the second slot.
[0013] In some embodiments, the cap may include a collar extending from the apex to the distal end. In some embodiments, an inner surface of the collar may include a first undercut and a second undercut. In some embodiments, the first protrusion may be disposed within the first undercut and the second protrusion may be disposed within the second undercut. In these embodiments, the cap may be disposed in a locked position.
[0014] In some embodiments, in response to rotation of the cap relative to the female luer adaptor in a first direction, the first protrusion may be configured to press against an end of the first undercut and the second protrusion may be configured to press against an end of the second undercut to prevent further rotation of the cap in the first direction. In some embodiments, in response to rotation of the cap relative to the female luer adaptor in a second direction opposite the first direction, the first protrusion may be configured to disengage from the first undercut and the second protrusion may be configured to disengage from the second undercut such that the cap may be removed from the female luer adaptor.
[0015] In some embodiments, the first undercut may include a longitudinal edge. In some embodiments, the longitudinal edge of the first undercut may include a first bump. In some embodiments, the first bump may interfere with the first protrusion to resist rotation of the cap in the second direction. In some embodiments, the longitudinal edge of the first undercut may be angled at the same angle as the first protrusion.
[0016] In some embodiments, the second undercut may include a longitudinal edge. In some embodiments, the longitudinal edge of the second undercut may include a second bump. In some embodiments, the second bump may interfere with the second protrusion to resist rotation of the cap in the second direction. In some embodiments, the longitudinal edge of the second undercut may be angled at the same angle as the second protrusion. In some embodiments, the terminal end of the collar may be chamfered.
[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory, and are not intended to limit the invention as claimed. It is to be understood that the various embodiments are not limited to the arrangement and instrumentality illustrated in the drawings. It is also to be understood that the embodiments may be combined or other embodiments may be utilized, and structural changes may be made without departing from the scope of the various embodiments of the invention, unless so claimed. Therefore, the following detailed description is not to be taken in a limiting sense. [Brief description of the drawings]
[0018] Example embodiments will be described and elaborated upon with additional specificity and detail through the use of the accompanying drawings.
[0019] [Figure 1] FIG. 1 is a top perspective view of an exemplary catheter system according to some embodiments. [Diagram 2]FIG. 2 is a bottom perspective view of an exemplary cap, according to some embodiments. [Diagram 3] FIG. 3 is a top perspective view of a cap according to some embodiments. [Figure 4A] FIG. 4A is a top perspective view of a cap in a locked position on an exemplary female luer adapter, showing the cap including a thru-hole cap, according to some embodiments. [Figure 4B] FIG. 4B is a cross-sectional view of the cap in a locked position on a female luer adapter, showing the cap including a thru-hole cap, according to some embodiments. [Diagram 5] FIG. 5 is a top perspective view of the cap in a locked position on a female luer adapter showing a female luer adapter including a side port, according to some embodiments. [Figure 6] FIG. 6 is a bottom perspective view of the cap and female luer adapter, showing the cap in an unlocked position configured to remove the female luer adapter, according to some embodiments. [Figure 7] FIG. 7 is a distal end view of the cap and female luer adapter showing the cap in the unlocked position. [Figure 8] FIG. 8 is a distal end view of the cap and female luer adapter showing the cap in the unlocked position. [Figure 9] FIG. 9 is a bottom view of the cap showing an exemplary top portion including a collar, according to some embodiments. [Figure 10] FIG. 10 is a top perspective view of a cap including a collar and in a locked position, according to some embodiments. [Figure 11] FIG. 11 is a bottom perspective view of the cap and female luer adapter in an unlocked position, showing the cap including an exemplary first undercut and an exemplary second undercut, according to some embodiments. [Figure 12] FIG. 12 is a bottom perspective view of a cap showing a cap including an exemplary first undercut and an exemplary second undercut, according to some embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0020] As used in this disclosure, the term "distal" refers to the portion of the description that is further from the practitioner, and the term "proximal" refers to the portion of the description that is closer to the practitioner. Referring now to Figure 1, a catheter system 10 is shown according to some embodiments. In some embodiments, the catheter system 10 may include a catheter hub 12, which may include a distal end 14, a proximal end 16, and a catheter hub lumen extending through the distal end 14 of the catheter hub 12 and the proximal end 16 of the catheter hub 12.
[0021] In some embodiments, the catheter system 10 may include a catheter 18 extending from a distal end 14 of the catheter hub 12. In some embodiments, the catheter 18 may include a peripheral intravenous catheter (PIVC), a midline catheter, or a peripherally inserted central catheter. In some embodiments, the catheter 18 may include a catheter tube, which may include a distal end 20, a proximal end 22, and a catheter lumen extending through the distal end 20 and the proximal end 22.
[0022] In some embodiments, a needle hub 24 may be coupled to the proximal end 16 of the catheter hub 12. In some embodiments, an introducer needle 26 may extend from the needle hub 24. In some embodiments, the needle hub 24 may include a flashback chamber and / or a needle safety device. As shown in FIG. 1, in some embodiments, the introducer needle 26 may extend through the catheter hub 12 and the catheter 18 when the catheter system 10 is in an insertion configuration ready for insertion into a patient. In some embodiments, the introducer needle 26 may include a sharp distal tip configured to penetrate the patient's skin and vein. In some embodiments, after the introducer needle 26 is used to position the catheter 18 in the vein, the catheter 18 may be advanced further distally into the vein and / or the introducer needle 26 may be removed from the catheter 18 and the catheter hub 12.
[0023] In some embodiments, the catheter system 10 may include any suitable catheter system. In some embodiments, the catheter system 10 may be similar to the BD SAF-T-INTIMA™ Closed IV Catheter System or the BD NEXIVA™ Closed IV Catheter System, or another suitable catheter system in one or more components and / or operation. In some embodiments, the catheter system 10 may include a female Luer adapter 28, which may be coupled to or integral with an extension tube 30 extending from a side port 32 of the catheter hub 12 disposed between the distal end 14 and the proximal end 16.
[0024] In some embodiments, the female luer adapter 28 may include a proximal end 36 and a distal end 38. In some embodiments, the proximal end 36 of the female luer adapter 28 may include a female luer. In some embodiments, the proximal end 36 of the female luer adapter 28 may include a first protrusion 40a and a second protrusion 40b. In some embodiments, the proximal end 36 of the female luer adapter 28 may include a threaded portion 42, and the first protrusion 40a and the second protrusion 40b may be disposed on the threaded portion 42.
[0025] In some embodiments, the female Luer adapter 28 may include a lumen extending therethrough and may be in fluid communication with the catheter 18. In some embodiments, the female Luer adapter 28 may be configured to be coupled to a blood collection device to facilitate collection of blood via the catheter 18 and / or may be configured to be coupled to an infusion device to provide fluids to a patient via the catheter 18.
[0026] 2-5, in some embodiments, the catheter system 10 may include a cap 44, which may include a top portion 46. In some embodiments, the cap 44 may include a male luer 48 extending distally from the top portion 46 for insertion into the proximal end 36 of the female luer adapter 34. In some embodiments, the cap 44 may include a first arm 50a, which may extend distally from the top portion 46. In some embodiments, the first arm 50a may include a first slot 52a. In some embodiments, the cap 44 may include a second arm 50b, which may extend distally from the top portion 46. In some embodiments, the second arm 50b may include a second slot 52b. In some embodiments, the first protrusion 40a may be disposed within the first slot 52a and the second protrusion 40b may be disposed within the second slot 52b. In these embodiments, cap 44, sometimes referred to in this disclosure as a "locking cap," may be placed in a locked position, for example, as illustrated in Figures 4A and 4B. In some embodiments, cap 44 is a single piece and may be monolithically formed as a single unit.
[0027] In some embodiments, in response to rotation of the cap 44 relative to the female luer adapter 28 in a first direction, the first protrusion 40a may be configured to press against an end 54a of the first slot 52a and the second protrusion 40b may be configured to press against an end 54b of the second slot 52b to prevent further rotation of the cap 44 in the first direction. In some embodiments, the first slot 52a may include another longitudinal edge 58 opposite the longitudinal edge 56. In some embodiments, the longitudinal edge 56 and / or the another longitudinal edge 58 of the first slot 52a may include a first bump 60a. In some embodiments, the first bump 60a may interfere with the first protrusion 40a to resist rotation of the cap 44 in a second direction opposite the first direction. In some embodiments, the longitudinal edge 56 of the first slot 52a and / or another longitudinal edge 58 may be angled at the same angle as the first protrusion 40a, which may facilitate twisting of the cap 44 between the locked and unlocked positions.
[0028] In some embodiments, the second slot 52b may include another longitudinal edge 64 opposite the longitudinal edge 62. In some embodiments, the longitudinal edge 62 and / or the other longitudinal edge 64 of the second slot 52b may include a second bump 60b. In some embodiments, the second bump 60b may interfere with the second protrusion 40b to resist rotation of the cap 44 in the second direction. In some embodiments, the longitudinal edge 62 and / or the other longitudinal edge 64 of the second slot 52b may be angled at the same angle as the second protrusion 40b, which may facilitate twisting of the cap 44 between the locked and unlocked positions. In some embodiments, the first bump 60a and the second bump 60b may enhance locking of the cap 44 to the female luer adapter 34.
[0029] In some embodiments, the first protrusion 40a may be opposite the second protrusion 40b. In some embodiments, the first slot 52a may be located on the same side as the first arm 50a when the second slot 52b is located on the second arm 50b, which may facilitate movement of the cap 44 between the locked and unlocked positions. More specifically, in some embodiments, the first slot 52a may extend from a right edge of the first arm 50a and the second slot 52b may extend from a right edge of the second arm 50b.
[0030] In some embodiments, the cap 44 may include one or more holes 66 disposed on an outer surface of the male luer 48. In some embodiments, the one or more holes 66 may be sized and configured to allow air to pass therethrough but not liquid. Thus, the cap 44 disposed within the female luer adapter 28 may form a liquid seal. In some embodiments, the one or more holes 66 may extend out of the female luer adapter 28. In some embodiments, the one or more holes 66 may facilitate blood flashback in response to insertion of the catheter 18 into a patient's vein.
[0031] In some embodiments, the terminal end 68a of the first arm 50a may be chamfered and the terminal end 68b of the second arm 50b may be chamfered. In some embodiments, the chamfered first arm 50a and the chamfered second arm 50b may facilitate placement of the cap 44 over the female luer adapter 34, such as the first prong 40a and the second prong 40b, during assembly and / or removal of the cap 44.
[0032] In some embodiments, cap 44 may include a vented cap, for example as illustrated in Figures 4A-5. In some embodiments, the vented cap may include a porous material or membrane that may be configured to allow air to exit female luer adapter 34 but not fluid. In other embodiments, cap 44 may include an end cap and top portion 46 may be solid, for example as illustrated in Figures 2-3.
[0033] In some embodiments, the female luer adapter 34 may include a side port, as illustrated in, for example, Figure 5. In other embodiments, the female luer adapter 34 may not include a side port, as illustrated in, for example, Figure 4. In some embodiments, in response to rotation of the cap 44 relative to the female luer adapter 34 in a second direction opposite the first direction, the first protrusion 40a may be removed from the first slot 52a, the second protrusion 40b may be removed from the second slot 52b, and the cap 44 may be in an unlocked position, which may facilitate removal of the cap 44.
[0034] 6, in some embodiments, the first arm 50a may be spaced from the second arm 50b by a gap 72 and another gap 74 opposite the gap 72. In some embodiments, in response to rotation of the cap 44 relative to the female luer adapter 34 in a second direction opposite the first direction and removal of the first protrusion 40a from the first slot 52a and the second protrusion 40b from the second slot 52b, the first protrusion 40a may be disposed within the gap 72 and the second protrusion 40b may be disposed within the other gap 74. In some embodiments, when the first protrusion 40a is disposed within the gap 72 and the second protrusion 40b is disposed within the other gap 74, the cap 44 may be configured to be unlocked and removed from the female luer adapter 28, as shown in FIG. 6, for example.
[0035] 7, in some embodiments, in response to rotation of the cap 44 relative to the female luer adapter 34 in a second direction 70 opposite the first direction 71, the first protrusion 40a may be removed from the first slot and the second protrusion 40b may be removed from the second slot. In some embodiments, the first protrusion 40a being removed from the first slot 52a and the second protrusion 40b being removed from the second slot 52b may unlock the cap 44, which may then be removed from the female luer adapter 28. Thus, in some embodiments, the cap 44 may be coupled to the female luer adapter 28 by a "push and turn" action by the practitioner and removed from the female luer adapter 28 by a "turn and pull" action by the practitioner.
[0036] 8, in some embodiments, the first protrusion 40a may be disposed in the first slot and the second protrusion 40b may be disposed in the second slot. In these embodiments, the cap 44 may be disposed in a locked position in which the first slot and the second slot prevent removal of the cap 44. In some embodiments, as illustrated in, for example, FIGS. 7-8, when viewed at the distal end, the first direction 71 may be clockwise and the second direction 70 may be counterclockwise, which may facilitate use with threaded portion 42, which may be right-handed.
[0037] 9-10, in some embodiments, the cap 44 may include a collar 76 extending distally from the top 46. In these embodiments, the first arm 50a and the second arm 50b may extend distally from the collar 76, and the first slot 52a and the second slot 52b may be disposed between the collar 76 and the first arm 50a and the second arm 50b, respectively. In some embodiments, the collar 76 may facilitate a closed system.
[0038] 11-12, in some embodiments, the cap may include a collar 76 extending from the apex 46 to a distal end. In some embodiments, the inner surface of the collar 76 may include a first undercut 78a and a second undercut 78b, which may function similarly to the first slot 52a and the second slot 52b of FIGS. 2-10. In some embodiments, the second undercut 78b may include a shape similar to the first undercut 78a. In some embodiments, the first protrusion 40a may be disposed within the first undercut 78a and the second protrusion 40b (see, e.g., FIGS. 1-10) may be disposed within the second undercut 78b. In these embodiments, the cap 44 may be disposed in a locked position.
[0039] In some embodiments, in response to rotation of the cap 44 relative to the female luer adapter 28 in a first direction, the first protrusion 40a may be configured to press against the end 54a of the first undercut 78a and the second protrusion 40b may be configured to press against the end of the second undercut, preventing further rotation of the cap 44 in the first direction. In some embodiments, in response to rotation of the cap 44 relative to the female luer adapter 28 in a second direction opposite the first direction, the first protrusion 40a may be configured to be removed from the first undercut 78a and the second protrusion 40b may be configured to be removed from the second undercut 78b, such that the cap 44 may be unlocked and removed from the female luer adapter 28.
[0040] In some embodiments, the first undercut 78a may include a longitudinal edge 56. In some embodiments, the longitudinal edge 56 of the first undercut 78a may include a first bump, such as, for example, the first bump 60a illustrated in FIGS. 2-3. In some embodiments, the first bump may interfere with the first protrusion 40a to resist rotation of the cap 44 in the second direction. In some embodiments, the longitudinal edge 56 of the first undercut 78a and / or another longitudinal edge 58 may be angled at the same angle as the first protrusion 40a, which may facilitate twisting of the cap 44 between the locked and unlocked positions.
[0041] In some embodiments, the second undercut 78b may include a longitudinal edge similar to the first undercut 78a and another longitudinal edge. In some embodiments, the longitudinal edge of the second undercut 78b may include a second bump, such as the second bump 60b illustrated in FIG. 2. In some embodiments, the second bump may interfere with the second protrusion 40b to resist rotation of the cap 44 in the second direction. In some embodiments, the longitudinal edge of the second undercut 78b and the another longitudinal edge may be angled at the same angle as the second protrusion, which may facilitate twisting of the cap 44 between the locked and unlocked positions. In some embodiments, the terminal end of the collar 76 may be chamfered.
[0042] All examples and conditional language incorporated herein are intended for educational purposes to help the reader understand the concepts contributed by the inventor to further develop the present invention and the art, and are not to be construed as being limited to such specifically incorporated examples and conditions. Although the embodiments of the present invention have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the spirit and scope of the present invention.
Claims
1. The catheter system catheter, a female luer adapter having a proximal end and a distal end, the proximal end having a first prong and a second prong, the female luer adapter being in fluid communication with the catheter; A cap, top, a male luer extending distally from the apex and adapted to be inserted into the proximal end of the female luer adapter; a first arm extending from the apex to a distal end, the first arm including a first slot; a second arm extending from the apex to a distal end, the second arm including a second slot, the first protrusion disposed within the first slot and the second protrusion disposed within the second slot; Equipped with a catheter system, wherein in response to rotation of the cap relative to the female luer adapter in a first direction, the first protrusion is configured to press against an end of the first slot and the second protrusion is configured to press against an end of the second slot to prevent further rotation of the cap in the first direction, and wherein in response to rotation of the cap relative to the female luer adapter in a second direction opposite the first direction, the first protrusion is configured to be disengaged from the first slot and the second protrusion is configured to be disengaged from the second slot.
2. 2. The catheter system of claim 1, wherein the first slot has another longitudinal edge opposite the longitudinal edge, and the longitudinal edge of the first slot or the other longitudinal edge has a first bump, the first bump interfering with the first protrusion to resist rotation of the cap in the second direction.
3. 3. The catheter system of claim 2, wherein the second slot has another longitudinal edge opposite the longitudinal edge, and the longitudinal edge or the other longitudinal edge of the second slot has a second bump, and the second bump interferes with the second protrusion to resist rotation of the cap in the second direction.
4. 2. The catheter system of claim 1, wherein the first slot has a longitudinal edge opposite another longitudinal edge, the longitudinal edge and the other longitudinal edge of the first slot being angled at the same angle as the first protrusion.
5. 5. The catheter system of claim 4, wherein the second slot has another longitudinal edge opposite a longitudinal edge, the longitudinal edge and the other longitudinal edge of the second slot being angled at the same angle as the second protrusion.
6. The catheter system of claim 1 , wherein the first protrusion is opposite the second protrusion.
7. The catheter system of claim 1 , wherein the first slot is located on the same side as the first arm when the second slot is located on the second arm.
8. The catheter system of claim 1 , wherein the proximal end of the female luer adapter comprises a threaded portion, and the first protrusion and the second protrusion are disposed on the threaded portion.
9. The catheter system of claim 1 , wherein, when viewed at the distal end, the first direction is clockwise and the second direction is counterclockwise.
10. 2. The catheter system of claim 1, wherein the cap further comprises a plurality of through holes disposed on an outer surface of the male luer, the through holes being sized to allow air to pass therethrough but not liquid, the plurality of through holes extending from the female luer adapter.
11. The catheter system of claim 1 , wherein a distal end of the first arm is beveled and a distal end of the second arm is beveled.
12. 2. The catheter system of claim 1, wherein the first arm is spaced from the second arm by a gap and another gap opposite the gap, and wherein in response to rotation of the cap relative to the female luer adapter in a second direction opposite the first direction and removal of the first protrusion from the first slot and the second protrusion from the second slot, the first protrusion is configured to be disposed within the gap, the second protrusion is configured to be disposed within the other gap, and the cap is configured to be removed from the female luer adapter.
13. The catheter system catheter, a female luer adapter having a proximal end and a distal end, the proximal end having a first prong and a second prong, the female luer adapter being in fluid communication with the catheter; A cap, top, a male luer extending distally from the apex and adapted to be inserted into the proximal end of the female luer adapter; a collar extending from the apex to the distal end, an inner surface of the collar comprising a first undercut and a second undercut, the first projection being disposed within the first undercut and the second projection being disposed within the second undercut; a catheter system in which in response to rotation of the cap relative to the female luer adapter in a first direction, the first protrusion is configured to press against an end of the first undercut and the second protrusion is configured to press against an end of the second undercut to prevent further rotation of the cap in the first direction, and in response to rotation of the cap relative to the female luer adapter in a second direction opposite the first direction, the first protrusion is configured to be disengaged from the first undercut, the second protrusion is configured to be disengaged from the second undercut, and the cap is configured to be disengaged from the female luer adapter.
14. 14. The catheter system of claim 13, wherein the first undercut has a longitudinal edge, the longitudinal edge of the first undercut having a first bump, the first bump interfering with the first protrusion to resist rotation of the cap in the second direction.
15. 15. The catheter system of claim 14, wherein the second undercut has a longitudinal edge, the longitudinal edge of the second undercut having a second bump, the second bump interfering with the second protrusion to resist rotation of the cap in the second direction.
16. The catheter system of claim 13 , wherein the first undercut comprises a longitudinal edge, the longitudinal edge of the first undercut being angled at the same angle as the first protrusion.
17. 17. The catheter system of claim 16, wherein the second undercut comprises a longitudinal edge, the longitudinal edge of the second undercut being angled at the same angle as the second protrusion.
18. The catheter system of claim 13 , wherein, when viewed at the distal end, the first direction is clockwise and the second direction is counterclockwise.
19. 14. The catheter system of claim 13, wherein the cap further comprises a plurality of through holes disposed on an outer surface of the male luer, the through holes being sized to allow air to pass therethrough but not liquid, the plurality of through holes extending out from the female luer adapter.
20. The catheter system of claim 13 , wherein the distal end of the collar is beveled.