Vascular Access System with Secondary Catheter

Abstract

The vascular access system includes a body and a primary catheter configured to be inserted into a patient's vascular system, the body having a catheter adapter having a first end and a second end disposed opposite the first end, a primary lumen in fluid communication with the primary catheter, a primary lumen port in fluid communication with the primary lumen, a secondary lumen in fluid communication with the primary catheter, a secondary lumen port in fluid communication with the secondary lumen, and a midline lumen at least partially received within the secondary lumen, the midline lumen having a retracted position in which a distal end of the midline lumen is located within at least one of the primary catheter and the secondary lumen, and an extended position in which the distal end of the midline lumen extends beyond the distal end of the primary catheter.

Description

[Technical field]

[0001] The present invention relates to a vascular access system with a secondary catheter. [Background technology]

[0002] This application claims priority to U.S. Provisional Application No. 63 / 296,302, entitled "VASCULAR ACCESS SYSTEM WITH SECONDARY CATHETER," filed January 4, 2022, the entire disclosure of which is incorporated herein by reference.

[0003] Catheters are frequently utilized for the administration of fluids into and out of the body. Patients in various settings, including hospitals and home care, receive fluids, medicines, and blood products through vascular access devices inserted into the patient's vascular system. Catheters of various types and sizes are widely used in a variety of procedures, including, but not limited to, treating infections, providing anesthesia or analgesia, providing nutritional support, treating cancerous tumors, maintaining blood pressure and heart rhythm, and many other clinical applications. A common vascular access device is a plastic catheter that is inserted into a patient's vein. Catheters vary in length from a few centimeters for peripheral access to tens of centimeters for central access. Catheters are commonly incorporated into catheter adapters to enhance the ease of use, accessibility, and utility of the catheter. The catheter adapter may be adapted to accommodate one end of the catheter such that one end of the catheter is supported by the catheter adapter and the body and tip of the catheter extend beyond one end of the catheter adapter. The catheter adapter typically further comprises a second end adapted to receive additional infusion components for use with the catheter. For example, the second end of the catheter adapter may include a series of threads for attaching an intravenous line or for connecting a syringe to the catheter adapter, thereby providing access to the patient's vascular system via an attached catheter.

[0004] The catheter may be inserted percutaneously. When inserted percutaneously, insertion of the catheter is generally assisted by an introducer needle. The introducer needle is generally housed within the lumen of the catheter such that the gauge of the needle approximates the inner diameter of the catheter. The needle is positioned within the catheter such that the tip of the needle extends beyond the tip of the catheter, whereby the needle is used to penetrate the patient's vein and provide an opening for inserting the catheter.

[0005] To confirm proper placement of the introducer needle and / or catheter within the vessel, the clinician will typically confirm that there is a "flashback" of blood within the flashback chamber of the catheter assembly. Once needle placement is confirmed, the clinician may temporarily shut off flow within the vessel and withdraw the needle, leaving the catheter in place for future blood draws, infusions, or probe access. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] US Patent Application Publication No. 2021 / 0290126 Summary of the Invention [Problem to be solved by the invention]

[0007] Blood collection or transfusion using a catheter can be difficult for several reasons, especially when the catheter is left in the patient for a day or more. For example, when the catheter is left in the patient for an extended period of time, the vein and catheter can easily become narrowed, collapsed, or kinked, become occluded by foreign material (fibrin, platelet clumps, thrombus, etc.), or the tip of the catheter can become attached to the blood vessel. For this reason, catheters are often used to collect blood samples at the time of catheter placement, but are used much less frequently to collect blood samples during the catheter's placement period. Thus, when a blood sample is needed, an additional needle stick is used to provide venous access for blood collection, which can be painful for the patient and can lead to increased material costs. [Means for solving the problem]

[0008] In one aspect or embodiment, a vascular access system includes a catheter adapter having a body configured to be inserted into a patient's vascular system and a primary catheter, the body having a first end and a second end disposed opposite the first end, a primary lumen in fluid communication with the primary catheter, a primary lumen port in fluid communication with the primary lumen, a secondary lumen in fluid communication with the primary catheter, a secondary lumen port in fluid communication with the secondary lumen, and a midline lumen at least partially received within the secondary lumen, the midline lumen having a retracted position in which a distal end of the midline lumen is disposed within at least one of the primary catheter and the secondary lumen and an extended position in which the distal end of the midline lumen extends beyond the distal end of the primary catheter.

[0009] The vascular access system may include an advancement member configured to be grasped by a medical technician, movement of the advancement member moving the midline lumen between the retracted and extended positions. The advancement member may be configured to move along an outer surface of the secondary lumen, such that the advancement member is disposed completely outside of the secondary lumen.

[0010] The body of the catheter adapter may include a side port disposed between the first end and the second end of the body, and the primary lumen and the secondary lumen are in fluid communication via a mating connector. The mating connector is in fluid communication with the side port via an intermediate tube. The mating connector may be integrally formed with the body of the catheter adapter. The primary lumen and the secondary lumen may be permanently joined to the mating connector. The primary lumen may be permanently joined to the mating connector, and the secondary lumen and the midline lumen are joined to the mating connector via a connector. The mating connector may be a needle-free connector. A longitudinal axis of the secondary lumen may be configured to align with a longitudinal axis of the intermediate tube and a longitudinal axis of the side port of the body of the catheter adapter.

[0011] The primary lumen port can be a first needle-free connector at a proximal end of the primary lumen and the secondary lumen port can be a second needle-free connector at a proximal end of the secondary lumen. The vascular access system can include a blood draw device configured to be connected to and in fluid communication with the secondary lumen.

[0012] The primary lumen and the secondary lumen can be in fluid communication via a mating connector that is attached to the second end of the body of the catheter adapter via a connector. A longitudinal axis of the secondary lumen can be configured to be aligned with a longitudinal axis of the primary catheter.

[0013] A flow path through the secondary lumen to the primary catheter may be open when the midline lumen is in the retracted position and closed when the midline lumen is in the extended position. The primary and secondary lumens may be in fluid communication via an interfacing connector, the interfacing connector including a seal configured to close the flow path through the secondary lumen to the primary catheter when the midline lumen is in the extended position.

[0014] The midline lumen may include a first portion extending from a distal end of the midline lumen to a location intermediate the distal end of the midline lumen and the proximal end of the midline lumen, and a second portion extending from the proximal end of the midline lumen to the first portion of the midline lumen, the first portion including a first material and the second portion including a second material, the second material being stiffer than the first material.

[0015] The midline lumen may include a tapered portion, the tapered portion of the midline lumen engaging the seal when the midline lumen is in the extended position.

[0016] The primary and secondary lumens may be in fluid communication via a mating connector, and the midline lumen includes a seal configured to engage a portion of the mating connector to close a flow path from the secondary lumen to the primary catheter when the midline lumen is in an extended position.

[0017] The primary and secondary lumens may be in fluid communication via a mating connector, with a seal actuator at least partially received within the mating connector, and movement of the seal actuator configured to close a flow path through the secondary lumen to the primary catheter.

[0018] The distal end of the midline lumen may be provided with a slit having open and closed positions to allow fluid to flow out or in from the midline lumen. The distal end of the primary catheter may be provided with an opening defined by a sidewall of the primary catheter.

[0019] In one aspect or embodiment, a method of using a vascular access system includes attaching a blood draw device to a secondary lumen port, moving the midline lumen to an extended position, and removing the blood draw device from the secondary lumen port.

[0020] In one aspect or embodiment, a method of using a vascular access system includes attaching a fluid source to the secondary lumen port, moving the midline lumen to an extended position, and delivering fluid from the fluid source through the midline lumen. [Brief description of the drawings]

[0021] The above and other features and advantages of the present disclosure, as well as the manner in which they are accomplished, will become more apparent, and the disclosure itself will be better understood, by reference to the following description of embodiments of the disclosure in conjunction with the accompanying drawings.

[0022] [Figure 1] FIG. 1 is a perspective view of a vascular access system according to one aspect or embodiment of the present application. [Diagram 2] FIG. 13 is a perspective view of a vascular access system according to a further aspect or embodiment of the present application, showing a retracted position of the midline lumen. [Diagram 3] FIG. 3 is a perspective view of the vascular access system of FIG. 2 showing the extended position of the midline lumen. [Figure 4] FIG. 3 is a perspective view of the vascular access system of FIG. 2 showing the secondary lumen connected to a blood sampling device. [Diagram 5] FIG. 3 is a perspective view of the vascular access system of FIG. 2 showing the secondary lumen connected to a blood sampling device. [Figure 6] FIG. 13 is a perspective view of a vascular access system according to a further aspect or embodiment of the present application, showing an extended position of the midline lumen. [Figure 7] FIG. 1 is a perspective view of a primary catheter and midline lumen according to one aspect or embodiment of the present application, showing the primary catheter and midline lumen inserted into a patient's blood vessel. [Figure 8] 1 is a schematic diagram of a vascular access system according to a further aspect or embodiment of the present application. [Figure 9A]FIG. 13 is a schematic diagram of a vascular access system according to a further aspect or embodiment of the present invention, showing a retracted position of the midline lumen. [Figure 9B] FIG. 9B is a schematic diagram of the vascular access system of FIG. 9A showing an extended position of the midline lumen. [Figure 10A] FIG. 13 is a perspective view of a vascular access system according to a further aspect or embodiment of the present application, showing a retracted position of the midline lumen. [Figure 10B] FIG. 10B is a perspective view of the vascular access system of FIG. 10A showing the retracted position of the midline lumen. [Figure 11] FIG. 13 is a perspective view of a vascular access system according to a further aspect or embodiment of the present application, showing a retracted position of the midline lumen. [Figure 12] FIG. 12 is a perspective view of the vascular access system of FIG. 11 showing the extended position of the midline lumen. [Figure 13] FIG. 12 is a perspective view of the vascular access system of FIG. 11 showing the extended position of the midline lumen with a blood draw device connected to the secondary lumen. [Figure 14] FIG. 1 is a perspective view of a vascular access system according to a further aspect or embodiment of the present application. [Figure 15] FIG. 13 is a perspective view of a vascular access system according to a further aspect or embodiment of the present application, showing an extended position of the midline lumen with a blood sampling device connected to the secondary lumen. [Figure 16] FIG. 1 is a partial cross-sectional view of a secondary lumen and an advancement member according to one aspect or embodiment of the present application. [Figure 17] 1 is a schematic diagram of a vascular access system according to a further aspect or embodiment of the present application. [Figure 18] 1 is a schematic diagram of a vascular access system according to a further aspect or embodiment of the present application. [Figure 19] 1 is a schematic diagram of a vascular access system according to a further aspect or embodiment of the present application. [Figure 20]1 is a schematic diagram of a vascular access system according to a further aspect or embodiment of the present application. [Figure 21] FIG. 1 is a schematic diagram of a primary catheter and midline lumen according to one aspect or embodiment of the present application. [Figure 22] FIG. 22 is a schematic diagram of the primary catheter and midline lumen of FIG. 21, showing the deflected position of the midline lumen. [Figure 23] FIG. 1 is a schematic diagram of a midline lumen according to one aspect or embodiment of the present application. [Figure 24] FIG. 1 is a schematic diagram of a midline lumen according to one aspect or embodiment of the present application. [Diagram 25] FIG. 1 is a schematic diagram of a midline lumen according to one aspect or embodiment of the present application. [Figure 26] FIG. 1 is a schematic diagram of a midline lumen according to one aspect or embodiment of the present application. [Figure 27] FIG. 1 is a schematic diagram of a midline lumen according to one aspect or embodiment of the present application.

[0023] Corresponding reference characters indicate corresponding parts throughout the several views. The illustrations set forth herein illustrate exemplary embodiments of the present disclosure, and such illustrations are not to be construed as limiting the scope of the present disclosure in any way. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Spatial or directional terminology such as "left", "right", "inside", "outside", "upper", "lower", etc. should not be considered limiting as the present invention can contemplate various alternative orientations.

[0025] In the following description, the terms "top", "bottom", "right", "left", "vertical", "horizontal", "top", "bottom", "side", "length" and derivatives thereof shall refer to the invention as depicted in the drawings. It should be understood, however, that unless expressly specified to the contrary, the invention may assume various alternative variations. It should also be understood that the specific devices illustrated in the accompanying drawings and described in the following specification are merely exemplary aspects of the invention.

[0026] Unless otherwise specified, all ranges or ratios disclosed herein are understood to include the starting and ending values, and all subranges or subratios contained therein. For example, a range or ratio stated as "1 to 10" should be considered to include all subranges or subratios between (and including) the minimum value of 1 and the maximum value of 10. That is, all subranges or subratios beginning with a minimum value of 1 or greater and ending with a maximum value of 10 or less.

[0027] The terms "first," "second," and the like do not refer to a particular order or chronology, but rather to different conditions, characteristics, or elements.

[0028] As used herein, "at least one" is synonymous with "one or more." For example, the phrase "at least one of A, B, and C" means any one of A, B, or C, or any two or more of A, B, or C in combination. For example, "at least one of A, B, and C" includes one or more of A only, one or more of B only, one or more of C only, one or more of A and B, one or more of A and C, one or more of B and C, or one or more of all of A, B, and C.

[0029] 1-5, a vascular access system 10 according to one aspect or embodiment of the present application includes a body 14, a catheter adapter 12 having a primary catheter 16 configured to be inserted into a patient's vascular system, a primary lumen 18 in fluid communication with the primary catheter 16, a primary lumen port 20 in fluid communication with the primary lumen 18, a secondary lumen 22 in fluid communication with the primary catheter 16, a secondary lumen port 24 in fluid communication with the secondary lumen 22, and a midline lumen 26 at least partially received within the secondary lumen 22. The midline lumen 26 has a retracted position (FIG. 2) in which a distal end 28 of the midline lumen 26 is located within at least one of the primary catheter 16 and the secondary lumen 22, and an extended position (FIG. 3) in which the distal end 28 of the midline lumen 26 extends beyond a distal end 30 of the primary catheter 16. Vascular access system 10 is configured to extend the reach of primary catheter 16 into a patient's vasculature for short-term needs, such as drawing blood samples, as well as longer-term needs, such as providing multi-lumen midline catheter functionality. Vascular access system 10 is configured to utilize midline lumen 26 for blood draws and medication administration, while also providing the option to infuse fluids through primary lumen 18.

[0030] 2, 3, and 16, in one aspect or embodiment, the vascular access system 10 includes an advancement member 32 configured to be grasped by a medical technician. Movement of the advancement member 32 moves the midline lumen 26 between a retracted position (FIG. 2) and an extended position (FIG. 3). The advancement member 32 is configured to move along an outer surface of the secondary lumen 22, with the advancement member 32 disposed entirely outside the secondary lumen 22. As shown in FIG. 16, the advancement member 32 includes a body 34 having a gripping surface 36 and a ball bearing 38 that engages the outer surface of the secondary lumen 22. In one aspect or embodiment, instead of providing a ball bearing 38, the body 34 of the advancement member 32 may include a bump, such as a cylindrical or spherical bump, that engages the outer surface of the secondary lumen 22. A coupler 40 is disposed within the secondary lumen 22, with the midline lumen 22 attached to the coupler 40. The coupler 40 is disposed between the ball bearings 38. Distal or proximal movement of the advancement member 32 engages the ball bearing 38 with the coupler and the secondary lumen is depressed and disposed between the ball bearing and the coupler 40, thereby causing the coupler 40 and midline lumen 26 to move with the advancement member 32. The advancement member 32 may be the same as or similar to the movement handle shown and described in the above-referenced U.S. Patent Application Publication No. 2005 / 0133991, the entirety of which is incorporated herein by reference.

[0031] Referring again to FIGS. 1-5, the body 14 of the catheter adapter 12 has a first end 56 and a second end 58 opposite the first end 56. The body 14 includes a side port 60 disposed between the first end 56 and the second end 58 of the body 14, with the primary lumen 18 and the secondary lumen 22 in fluid communication via a mating connector 62. The mating connector 62 is in fluid communication with the side port 60 via an intermediate tube 64. The primary lumen 18 and the secondary lumen 22 are permanently joined to the mating connector 62, such as by bonding, gluing, or other suitable arrangement. The longitudinal axis of the secondary lumen 22 is configured to align with the longitudinal axis of the intermediate tube 64 and with the longitudinal axis of the side port 60 of the body 14 of the catheter adapter 12. Optionally, the intermediate tube port may connect to the catheter adapter body at a location offset from the access of the catheter adapter body. This offset location may be located below or above the access of the primary catheter adapter body to create a swirling effect and / or improve flushing of the catheter adapter to remove residual blood or medication when fluid is delivered. Thus, the secondary lumen 22, the mating connector 62, the intermediate tube 64, the side port 60, and the primary catheter 16 define a non-tortuous path to facilitate passage of the midline lumen 26 through the primary catheter 16 and into the patient's vasculature. In certain aspects or embodiments, the primary lumen port 20 is a first needle-free connector at the proximal end of the primary lumen 18, and the secondary lumen port 24 is a second needle-free connector at the proximal end of the secondary lumen 22. As shown in FIGS. 4 and 5, in certain aspects or embodiments, the vascular access system 10 includes a blood draw device 70 configured to be connected to and in fluid communication with the secondary lumen 22. The blood draw device 70, such as a BD Vacutainer® Luer-Lok™ access device, may connect to the secondary lumen port 24.

[0032] The vascular access system 10 of FIGS. 1-5 is configured to function similarly to a standard integrated peripheral venous catheter and can be infused through the primary lumen port 20 and the secondary lumen port 24. When flushing through the secondary lumen port 24, fluid flows through the secondary lumen 22 and the midline lumen 26 to ensure that each lumen remains flushed. When the midline lumen 26 is in the extended position, it can be utilized for delivery of caustic medications. Delivering medication downstream in the patient's vein, away from the distal end 30 of the primary catheter 16, can result in faster hemodilution and reduced risk of chemical phlebitis at the location of the primary catheter 16.

[0033] With reference to FIG. 6, in one aspect or embodiment, the secondary lumen 22 is joined to a mating connector via a connector 72, such as a luer connector or a needle-free connector.

[0034] 8, in one aspect or embodiment, the mating connector 62 is integrally formed with the body 14 of the catheter adapter 12. The mating connector 62 may be molded together with the catheter adapter 12 or may be formed separately and mated or coupled to the catheter adapter 12.

[0035] 9A and 9B, in one aspect or embodiment, the midline lumen 26 includes a foldable portion 74 configured to fold when the midline lumen 26 is in the retracted position and to straighten when the midline lumen 26 is in the extended position.

[0036] 10A-13, in one aspect or embodiment, the primary lumen 18 is permanently joined to a mating connector 62, and the secondary lumen 22 and the midline lumen 26 are joined to the mating connector 62 via connector 76. The mating connector 62 may be a needle-free connector, although other suitable connectors may be used. The midline lumen 26 is shown in a retracted position (FIG. 11), an extended position for drug delivery (FIG. 12), and an extended position for blood withdrawal (FIG. 13).

[0037] 14 and 15 , in one aspect or embodiment, the primary lumen 18 and the secondary lumen 22 are in fluid communication via a mating connector 62, which is attached to the second end 58 of the body 14 of the catheter adapter 12 via a connector 80, such as a Luer connector, although other suitable connection configurations may be utilized. The longitudinal axis of the secondary lumen 22 is configured to align with the longitudinal axis of the primary catheter 16 such that a tortuous path is provided for the midline lumen 26.

[0038] 17-20 , in one aspect or embodiment, the flow path through the secondary lumen 22 to the primary catheter 16 is open when the midline lumen 26 is in the retracted position and closed when the midline lumen 26 is in the extended position. The mating connector 62 can include a seal 82 configured to close the flow path through the secondary lumen 22 to the primary catheter 16 when the midline lumen 26 is in the extended position.

[0039] 17, in one aspect or embodiment, the midline lumen 26 includes a first portion 84 extending from a distal end 28 of the midline lumen 26 to a location intermediate the distal end 28 of the midline lumen 26 and a proximal end 86 of the midline lumen 26, and a second portion 88 extending from the proximal end 86 of the midline lumen 26 to the first portion 84 of the midline lumen 26. The first portion 84 is formed from a first material and the second portion 88 is formed from a second material, the second material being harder than the first material. The harder second material is capable of pushing through the seal 82 in the mating connector 62. The first portion 84 of the midline lumen 26 may be bonded to the second portion 88 of the midline lumen 26 or may be connected to one another via an interference fit.

[0040] 18, in one aspect or embodiment, the midline lumen 26 includes a tapered portion 90, and when the midline lumen 26 is in the extended position, the tapered portion 90 of the midline lumen 26 engages with the seal 82 in the mating connector 62.

[0041] 19 , in one aspect or embodiment, the midline lumen 26 includes a seal 92 configured to engage a portion of the mating connector 62 to close the flow path through the secondary lumen 22 to the primary catheter 16 when the midline lumen 26 is in the extended position. More specifically, the seal 92 is secured to an outer surface of the midline lumen 26 and disposed within the secondary lumen 22. When the midline lumen 26 is advanced to the extended position, the seal 92 engages a portion of the mating connector 62 to close the secondary lumen 22. In one aspect or embodiment, the seal 92 is tapered and engages a tapered portion of the mating connector 62.

[0042] 20 , in one aspect or embodiment, the vascular access system 10 includes a seal actuator 94 that is at least partially received within the mating connector 62. Movement of the seal actuator 94 is configured to close the flow path through the secondary lumen 22 to the primary catheter 16. A medical technician can move the seal actuator 94 to open or close the flow path through the secondary lumen 22 as needed. The seal actuator 94 may be hollow to allow the midline lumen 26 to pass through the seal actuator 94.

[0043] 7, 21, and 22, in one aspect or embodiment, the distal end 28 of the midline lumen 26 is closed and defines a slit 96 having an open position that allows fluid to flow out or in from the midline lumen 26 and into the closed position. The distal end 30 of the primary catheter 16 may include an opening 98 defined by a sidewall of the primary catheter 16 to allow passage of fluid between the primary catheter 16 and the midline lumen 26.

[0044] 23-27, the distal end 28 of the midline lumen 26 may be of various shapes and configurations, such as a standard open-ended tip (FIG. 23), a molded tip (FIG. 24), a diffuser tip (FIG. 25), a valve tip (FIG. 26), a blunt tip with an opening (FIG. 27), or other suitable configurations may be used with the vascular access system 10. The midline lumen 26 may be formed from a flexible material that is more venously friendly and can move and flex with the fluid during flush advancement. The material of the midline lumen 26 may be a rigid, semi-rigid, or flexible polymeric material, such as polyurethane, polyimide, silicone, TPE, TPU, or other polymeric and / or elastomeric material. The outer diameter of the midline lumen 26 may vary along the length of the midline lumen 26 to maximize flow rate, provide a sealing function, and / or optimize placement time. A lubricant may be added to the midline lumen 26 to facilitate advancement of the midline lumen 26. Lubricant may also be added to the primary lumen 18, the secondary lumen 22, the ball bearings 28, and / or other components of the vascular access system 10. The secondary lumen 22 may have markings that indicate how far the midline lumen 26 has advanced relative to other portions of the vascular access system 10.

[0045] In one aspect or embodiment, a method of using vascular access system 10 includes attaching blood draw device 70 to secondary lumen port 24, moving midline lumen 26 to the extended position, and removing blood draw device 70 from secondary lumen port 24. The method may also include delivering a medication through the midline lumen.

[0046] Although the present invention has been described in detail for purposes of illustration, based on what are presently considered to be the most practical and preferred embodiments, it should be understood that such detail is for this purpose only, and that the present invention is not limited to the disclosed embodiments, but rather is intended to cover modifications and equivalent arrangements within the spirit and scope of the appended claims. For example, it should be understood that the present invention contemplates that, to the extent possible, one or more features of any embodiment can be combined with one or more features of any other embodiment.

Claims

1. 1. A vascular access system comprising: a catheter adapter comprising a body and a primary catheter configured to be inserted into a patient's vascular system, the body having a first end and a second end opposite the first end; a primary lumen in fluid communication with the primary catheter; a primary lumen port in fluid communication with the primary lumen; a secondary lumen in fluid communication with the primary catheter; a secondary lumen port in fluid communication with the secondary lumen; 1. A vascular access system comprising: a midline lumen at least partially received within the secondary lumen, the midline lumen having a retracted position where a distal end of the midline lumen is located within at least one of the primary catheter, the catheter adapter, and the secondary lumen, and an extended position where the distal end of the midline lumen extends beyond a distal end of the primary catheter.

2. 10. The vascular access system of claim 1, further comprising an advancement member configured to be grasped by a medical technician, wherein movement of the advancement member moves the midline lumen between the retracted position and the extended position.

3. 3. The vascular access system of claim 2, wherein the advancement member is configured to travel along an exterior surface of the secondary lumen, the advancement member being disposed entirely outside of the secondary lumen.

4. 4. The vascular access system of claim 1, wherein the body of the catheter adapter comprises a side port disposed between the first end and the second end of the body, and the primary lumen and the secondary lumen are in fluid communication via a mating connector.

5. The vascular access system of claim 4 , wherein the mating connector is in fluid communication with the side port via an intermediate tube.

6. The vascular access system of claim 4 , wherein the mating connector is integrally formed with the body of the catheter adapter.

7. The vascular access system of claim 4 , wherein the primary lumen and the secondary lumen are permanently coupled to the mating connector.

8. The vascular access system of claim 4 , wherein the primary lumen is permanently joined to the mating connector, and the secondary lumen and the midline lumen are joined to the mating connector via connectors.

9. The vascular access system of claim 8 , wherein the mating connector comprises a needle-free connector.

10. 6. The vascular access system of claim 5, wherein a longitudinal axis of the secondary lumen is configured to align with a longitudinal axis of the intermediate tube and a longitudinal axis of the side port of the body of the catheter adapter.

11. 11. The vascular access system of claim 1, wherein the primary lumen port comprises a first needle-free connector at a proximal end of the primary lumen and the secondary lumen port comprises a second needle-free connector at a proximal end of the secondary lumen.

12. 9. The vascular access system of claim 1, further comprising a blood sampling device configured to be connected and in fluid communication with the secondary lumen.

13. 2. The vascular access system of claim 1, wherein the primary lumen and the secondary lumen are in fluid communication via a mating connector, the mating connector being attached to the second end of the body of the catheter adapter via a connector.

14. The vascular access system of claim 13 , wherein a longitudinal axis of the secondary lumen is configured to be aligned with a longitudinal axis of the primary catheter.

15. 2. The vascular access system of claim 1, wherein a flow path through the secondary lumen to the primary catheter is open when the midline lumen is in the retracted position and is closed when the midline lumen is in the extended position.

16. 16. The vascular access system of claim 15, wherein the primary lumen and the secondary lumen are in fluid communication via a mating connector, the mating connector comprising a seal configured to close a flow path from the secondary lumen to the primary catheter when the midline lumen is in the extended position.

17. 17. The vascular access system of claim 16, wherein the midline lumen comprises a first portion extending from the distal end of the midline lumen to a location intermediate the distal end of the midline lumen and a proximal end of the midline lumen and a second portion extending from the proximal end of the midline lumen to the first portion of the midline lumen, the first portion comprising a first material and the second portion comprising a second material, the second material being harder than the first material.

18. 17. The vascular access system of claim 16, wherein the midline lumen comprises a tapered portion, the tapered portion of the midline lumen engaging the seal when the midline lumen is in the extended position.

19. 16. The vascular access system of claim 15, wherein the primary lumen and the secondary lumen are in fluid communication via a mating connector, and the midline lumen comprises a seal configured to engage a portion of the mating connector to close a flow path from the secondary lumen to the primary catheter when the midline lumen is in the extended position.

20. 2. The vascular access system of claim 1, wherein the primary lumen and the secondary lumen are in fluid communication via a mating connector, a seal actuator is at least partially received within the mating connector, and movement of the seal actuator is configured to close a flow path through the secondary lumen to the primary catheter.

21. 21. The vascular access system of claim 1, wherein the distal end of the midline lumen comprises a slit having an open position and a closed position to allow fluid to flow out or in from the midline lumen.

22. 22. The vascular access system of claim 1, wherein a distal end of the primary catheter comprises an opening defined by a sidewall of the primary catheter.

23. 13. A method of using the vascular access system of claim 1, comprising: attaching a blood collection device to the secondary lumen port; moving the midline lumen to the extended position; and removing the blood sampling device from the secondary lumen port.

24. 13. A method of using the vascular access system of claim 1, comprising: attaching a fluid source to the secondary lumen port; moving the midline lumen to the extended position; delivering fluid from the fluid source through the midline lumen.

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