Dressing-based catheter traction devices and related systems

Abstract

The catheter assembly includes a catheter adapter (102), a catheter (112), and a dressing (114) that can securely apply traction to the catheter when it is positioned within the patient's vasculature. The catheter adapter can include a proximal end, a distal end, and a lumen extending therebetween. The catheter can extend from the distal end of the catheter adapter. The dressing can include a first section (116) adjustably engaged with a second section (118). The first section can be configured to secure the catheter adapter and / or the catheter to the patient. The second section can be configured to be adjustably positioned relative to the first section to apply traction to the catheter within the vasculature.

Description

[Technical Field]

[0001] Catheters are commonly used for various infusion therapies. For example, catheters can be used to infuse fluids, such as saline, various medications, and total parenteral nutrition, into a patient. Catheters can also be used to withdraw blood from a patient to obtain a blood sample. [Background technology]

[0002] A common catheter is an over-needle peripheral intravenous ("IV") catheter. As the name suggests, an over-needle catheter is a catheter that can be fitted over an introducer needle that has a sharpened distal end. 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 needle bevel pointing away from the patient's skin. The catheter and introducer needle are typically inserted into the patient's vascular system at a shallow angle from the skin.

[0003] To verify proper placement of the introducer needle and / or catheter within the blood vessel, the user typically checks for a "flashback" of blood within the flashback chamber of the catheter assembly. Once needle placement is confirmed, the user may temporarily occlude flow within the vasculature and remove the needle, leaving the catheter in place for subsequent blood draws, infusions, or probe access.

[0004] However, catheter function can be hindered for several reasons. For example, prolonged catheter residence time within the vasculature significantly reduces the ability of blood to flow under vacuum pressure. Catheter blockage due to the presence of a thrombus near the catheter tip and / or vein wall is a major factor impeding fluid flow during catheter residence within the vasculature. As a result, catheters are commonly used for blood sampling at the time of catheter placement but are less commonly used for blood sampling during catheterization.

[0005] If a blood sample is desired during catheterization, an additional needle stick is typically used to provide venous access for blood collection, causing additional pain and anxiety to the patient and increasing material costs. Applying traction to move or reposition the catheter tip within the vein can improve the success rate of blood collection. However, considerable variation exists among conventional traction application techniques, all of which require manual manipulation of the catheter adapter. Therefore, these methods are notoriously inconsistent and can lead to catheter contamination and / or dislodgement.

[0006] The subject matter claimed herein is not limited to embodiments that solve any shortcomings or that operate only in such environments. Rather, this background is only provided to illustrate one example technology area where some embodiments described herein may be practiced. Summary of the Invention

[0007] The present disclosure generally relates to catheter assemblies used to infuse fluids and / or collect blood from a patient's vascular system. However, various complications and blockages can impede fluid flow through the catheter, thus impairing its function and performance. For example, prolonged catheter residence time within the vascular system significantly reduces the ability of blood to flow under vacuum pressure. Catheter blockage due to the presence of a thrombus near the catheter tip and / or vein wall is a major factor impeding fluid flow during the catheter's residence period within the vascular system. Applying traction to move or reposition the catheter tip within the vein can significantly improve catheter function and enable successful blood collection.

[0008] In some embodiments, a catheter assembly for applying traction to a catheter may include a catheter adapter having a proximal end, a distal end, and a lumen extending along a longitudinal axis between the proximal and distal ends. The catheter may extend from the distal end of the catheter adapter. In some embodiments, a dressing may apply traction to the catheter when the catheter is positioned within a patient's vasculature. In some embodiments, the dressing may include a first section adjustably coupled to a second section. Some embodiments of the first section may be configured to secure the catheter adapter and / or catheter to the patient, while the second section may be configured to be adjustably secured relative to the first section. In this manner, some embodiments of the dressing may apply traction to a catheter within the vasculature.

[0009] In some embodiments, the first section and the second section can be independent of one another. Some embodiments of the first section include an opening for receiving at least a portion of the catheter adapter and / or the catheter. In some embodiments, the first section can include an adhesive for securing at least one of the catheter adapter and the catheter to the patient. Similarly, in some embodiments, the second section can be configured to be secured to the patient.

[0010] In some embodiments, the catheter assembly may further include an adjustment element for adjustably coupling the first section to the second section. Some embodiments of the adjustment element may be releasable to separate the first and second sections. In some embodiments, the adjustment element may include one or more tethers. Each tether may include a first end coupled to the first section and a second end coupled to the second section. In some embodiments, each tether may be selectively tightened to apply traction to the catheter.

[0011] In some embodiments, the adjustment element may include a first finger grip coupled to the first section and / or the catheter adapter and a second finger grip coupled to the second section. In this manner, some embodiments allow the second section to be manually adjusted relative to the first section to apply traction to the catheter. In some embodiments, the adjustment element may include at least one arm extending between the first section and the second section. In some embodiments, manipulating the position of one or more arms may adjust the distance between the first section and the second section, thereby applying traction to the catheter.

[0012] Some embodiments of the catheter assembly may further include a locking element for fixing the distance between the first section and the second section to maintain traction on the catheter. In some embodiments, the locking element may mechanically engage at least a portion of one or more arms to maintain traction on the catheter.

[0013] In some embodiments, the arms may include one or more joints. In some embodiments, pushing the arms inward toward the longitudinal axis may apply traction to the catheter.

[0014] In some embodiments, each of the one or more arms may include a switch portion movably coupled to the extension portion. According to some embodiments, moving the switch portion in a direction parallel to the longitudinal axis and away from the first section may shorten the distance between the first section and the second section, thereby applying traction to the catheter. In some embodiments, the adjustment element may include a dial feature coupled to the arm. In some embodiments, rotating the dial feature may adjust the distance between the first section and the second section, thereby applying traction to the catheter.

[0015] In some embodiments, a catheter assembly for applying traction to a catheter may include a catheter adapter, a catheter extending from the distal end of the catheter adapter, and a stabilizing element. Some embodiments of the stabilizing element may be configured to slidably engage with the catheter adapter element. In some embodiments, the stabilizing element may include one or more tracks disposed substantially parallel to the longitudinal axis. Thus, some embodiments of the stabilizing element may maintain the lateral position of the catheter adapter while allowing the catheter adapter to slide parallel to the longitudinal axis along the tracks.

[0016] In some embodiments, the catheter adapter may include one or more engagement features extending parallel to the longitudinal axis. Some embodiments of the engagement features may slidably engage one or more tracks. Some embodiments of the stabilizing element may be configured to adjust the angle of the catheter adapter relative to the patient. In this manner, some embodiments of the stabilizing element may apply traction to the catheter within the vasculature.

[0017] In some embodiments, a catheter assembly for applying traction to a catheter may include a catheter adapter, a catheter extending from a distal end of the catheter adapter, and a dressing configured to secure the catheter adapter and / or the catheter relative to a patient. In some embodiments, the dressing may include a tilt mechanism configured to adjust the angle of the catheter adapter relative to the stabilizing element to apply traction to the catheter within the vasculature. In some embodiments, the tilt mechanism may include a flexible linkage element to allow manual adjustment of the angle of the catheter adapter relative to the stabilizing element.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the claimed invention. It is to be understood that the various embodiments are not limited to the arrangements and instrumentality shown in the drawings. It is also to be understood that embodiments may be combined or other embodiments may be utilized, and that 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 explanation of the drawings]

[0019] Example embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings.

[0020] [Figure 1] FIG. 1 is a top perspective view of an exemplary catheter assembly including an exemplary dressing for applying traction to a catheter, according to some embodiments. [Figure 2A] FIG. 2A is a top perspective view of another exemplary catheter assembly and an exemplary dressing for applying traction to a catheter, according to some embodiments. [Figure 2B] FIG. 2B is a side perspective view of the catheter assembly of FIG. 2A. [Figure 3A] FIG. 3A is a top perspective view of an exemplary catheter assembly with an exemplary dressing including a toggle element, according to some embodiments. [Figure 3B] FIG. 3B is a top perspective view of the catheter assembly of FIG. 3A showing a dressing positioned to apply traction to the catheter, according to some embodiments. [Figure 4A] FIG. 4A is a side perspective view of another exemplary catheter assembly including another exemplary dressing, according to some embodiments. [Figure 4B]FIG. 4B is a side perspective view of the catheter assembly of FIG. 4A showing adjustment of the dressing according to some embodiments. [Figure 4C] FIG. 4C is a side perspective view of the catheter assembly of FIG. 4A showing a dressing positioned to apply traction to the catheter, according to some embodiments. [Figure 5A] FIG. 5A is a top perspective view of another exemplary catheter assembly including another exemplary dressing, according to some embodiments. [Figure 5B] FIG. 5B is a top perspective view of the catheter assembly of FIG. 5A showing a dressing positioned to apply traction to the catheter, according to some embodiments. [Figure 6A] FIG. 6A is a top perspective view of another exemplary catheter assembly including another exemplary dressing, according to some embodiments. [Figure 6B] FIG. 6B is a top perspective view of the catheter assembly of FIG. 6A positioned to apply traction to the catheter, according to some embodiments. [Figure 7A] FIG. 7A is an exploded top perspective view of an exemplary catheter assembly including an exemplary stationary base element and an exemplary dressing, according to some embodiments. [Figure 7B] FIG. 7B is a side perspective view of the catheter assembly of FIG. 7A. [Figure 7C] FIG. 7C is a side perspective view of the catheter assembly of FIG. 7A positioned to apply traction to the catheter. [Figure 7D] FIG. 7D is a side perspective view of the catheter assembly of FIG. 7A including another exemplary stationary base element, according to some embodiments. [Figure 8] FIG. 8 is a perspective view of an exemplary catheter adapter and an exemplary stabilizing element, according to some embodiments. [Figure 9] FIG. 9 is a top perspective view of another exemplary catheter assembly having another exemplary dressing, according to some embodiments. [Figure 10A] FIG. 10A is a perspective view of another exemplary catheter assembly and an exemplary dressing for applying traction to a catheter, according to some embodiments. [Figure 10B] FIG. 10B is a top perspective view of the catheter assembly and dressing of FIG. 10A. [Figure 11] FIG. 11 is a side view of an exemplary catheter assembly and an exemplary dressing, according to some embodiments. [Figure 12] FIG. 12 is a top perspective view of another exemplary catheter assembly and an exemplary dressing for applying traction to a catheter, according to some embodiments. [Figure 13] FIG. 13 is a top perspective view of another exemplary catheter assembly and another exemplary dressing, according to some embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0021] As used herein, the term "distal" refers to a direction away from a user who brings the device into contact with and closer to the patient. The term "proximal" refers to a direction closer to a user who brings the device into contact with the patient and further from the patient. Thus, for example, the end of a catheter that first touches the patient's body is the distal end, while the opposite end of the catheter is the proximal end of the catheter.

[0022] As mentioned above, various complications and blockages can impede fluid flow through the catheter, especially if the catheter remains in the patient's vasculature for an extended period. Catheter blockage due to thrombus near the catheter tip and / or vein wall is a major factor impeding fluid flow through the catheter. Applying traction to move or reposition the catheter tip within the vein can significantly improve catheter function and allow for successful blood collection.

[0023] However, users tend to use the traction application technique that they find most convenient, resulting in a large degree of variability in traction application technique and results. In addition, many traction application methods involve manipulation of the catheter adapter, with the concomitant risk of catheter contamination and dislodgement.

[0024] The present disclosure describes several concepts that allow for consistent application of traction forces through a dressing placed over a catheter. Traction applied through the dressing may avoid manipulation of the catheter, thereby extending the life of the indwelling catheter by minimizing the possibility of contamination and dislodgement. Several embodiments provided herein also facilitate the application of traction in a consistent manner to increase the likelihood of successful blood collection.

[0025] 1 , in some embodiments, a catheter assembly 100 may be configured to apply traction to a catheter 112 to create a clear path for fluid flow. In some embodiments, the catheter assembly 100 may include a catheter adapter 102 having a proximal end 104, a distal end 106, and an inner lumen 108 extending along a longitudinal axis 110 between the proximal end 104 and the distal end 106.

[0026] A catheter 112 may extend from the distal end 106 of the catheter adapter 102. In some embodiments, the catheter 112 may be used for blood withdrawal, fluid delivery, patient or device monitoring, or other clinical needs. In some embodiments, the catheter 112 may include, for example, a peripheral IV catheter, a peripherally inserted central catheter, or a midline catheter. In some embodiments, the catheter 112 may be pre-inserted into the patient's vascular system and may remain within the vascular system.

[0027] In some embodiments, the dressing 114 may securely apply traction to the catheter 112 while the catheter 112 is positioned within the patient's vasculature. In some embodiments, the dressing 114 may include an adhesive 126 for securing the dressing 114 to the patient. In some embodiments, the dressing 114 may include a two-piece or two-section dressing 114 connected by an adjustment element 128. In some embodiments, the dressing 114 may include more than two sections and may be connected by one or more adjustment elements 128, such as an adjustable tether 130 or other suitable fasteners or straps.

[0028] In some embodiments, each or some of the sections of dressing 114 may be spaced apart from one another by a distance 122. The distance 122 between the sections of dressing 114 may be selected to optimize the application of traction to catheter 112. For example, during operation, some embodiments may apply traction to catheter 112 by adjusting the distance 122 between two or more of the pieces or sections of dressing 114. In some embodiments, the distance 122 between dressing 114 sections may be adjusted manually or automatically by adjustment element 128. In some embodiments, adjusting the distance 122 between dressing 114 sections in this manner may exert tension between the dressing 114 sections to apply traction to catheter 112.

[0029] In some embodiments, the dressing 114 may include a first section 116 adjustably coupled to a second section 118. In some embodiments, an adjustment element 128 may adjustably couple the first section 116 to the second section 118. The adjustment element 128 may include, for example, a tether, winch, ratchet, pulley, dial, screw, cable tie, or other suitable tensioning device or mechanism. Some embodiments of the adjustment element 128 may be releasable and / or removable to separate the first and second sections 116, 118.

[0030] In some embodiments, the first section 116 may be independent from the second section 118. Some embodiments of the first section 116 may be configured to secure and / or maintain the position of the catheter adapter 102 and / or catheter 112 relative to the patient, for example, via adhesive 126. In some embodiments, the first section 116 may include an opening 124 or other suitable feature or mechanism for maintaining the catheter adapter 102 and / or catheter 112 in a substantially fixed position relative to the patient.

[0031] In some embodiments, the second section 118 may be adjustably positioned and / or secured relative to the first section 116 to apply traction to the catheter 112 within the vasculature. In some embodiments, the second section 118 may include an adhesive 126 or other suitable device or mechanism for securing and / or maintaining the position of the second section 118 relative to the patient. Some embodiments of the second section 118 may include a securement device or mechanism for securing and / or maintaining the position of the second section 118 relative to the first section 116.

[0032] In some embodiments, the position of the second section 118 relative to the first section 116 can be adjusted by an adjustment element 128. In some embodiments, as shown in FIG. 1 , the adjustment element 128 can include one or more tethers 130 for coupling the sections 116, 118 of the dressing 114 together. In some embodiments, a first end 132 of the tether 130 can be coupled to the first section 116 and a second end 134 of the tether 130 can be coupled to the second section 118.

[0033] In some embodiments, the tethers 130 may be configured such that each tether 130 is individually adjusted to pull traction on the catheter 112. In some embodiments, the tethers 130 may be configured such that they are collectively adjusted as a single unit to pull traction on the catheter 112. In some embodiments, each tether 130 may pull traction on the catheter 112 in either the proximal or distal direction.

[0034] In some embodiments, tightening tether 130 may pull the patient's skin, causing tip 120 of catheter 112 to be reoriented within the vasculature. In some embodiments, repositioning tip 120 of catheter 112 within the vasculature in this manner may clear a fluid path for fluid or drug infusion or blood withdrawal. In some embodiments, adjustment element 128 may be automatically or manually adjusted or loosened to return dressing 114 to its initial position, thereby releasing traction on catheter 112.

[0035] 2 , in some embodiments, the adjustment element 128 may include one or more finger grips 200, 202 to facilitate manual adjustment of the second section 118 of the dressing 114 relative to the first section 116 of the dressing 114. In some embodiments, the first finger grip 200 may be coupled to the first section 116, and the second finger grip 202 may be coupled to the second section 118. In some embodiments, the first section 116 and the second section 118 of the dressing 114 may be monolithically formed as a single unit. Some embodiments of the first finger grip 200 or the second finger grip 202 may be coupled to the catheter adapter 102.

[0036] During operation, a user may utilize first finger grip 200 to adjust or maintain the position of first section 116 relative to the patient, while utilizing second finger grip 202 to adjust or maintain the position of second section 118 relative to first section 116. In some embodiments, first finger grip 200 may be utilized to maintain the position of first section 116, while the position of second section 118 may be adjusted relative to first section 116 via second finger grip 202.

[0037] In some embodiments, the first finger grip 200 may be utilized to adjust the position of the first section 116 in a proximal or distal direction, while the position of the second section 118 may be simultaneously adjusted in the opposite direction via the second finger grip 202. In some embodiments, the first and / or second finger grips 200, 202 may be utilized to adjust the tilt, inclination, or other position or orientation of the first section 116 relative to the second section 118. In some embodiments, manually adjusting the position of the first section 116 relative to the second section 118 in this manner, utilizing one or more of the finger grips 200, 202, may apply traction to the catheter 112 to reposition the tip 120 of the catheter 112 within the vasculature, thereby opening a fluid pathway.

[0038] 3 , in some embodiments, adjustment element 128 may include one or more arms 300 extending between first section 116 and second section 118. In some embodiments, manipulating the position and / or orientation of one or more arms 300 may adjust the distance 122 between first section 116 and second section 118, thereby applying traction to catheter 112.

[0039] Some embodiments of the arm 300 may include one or more joints 304 to allow relative movement between the arm 300 segments. As shown in FIG. 3A , in some embodiments, the arm 300 may include a switch portion 306 movably coupled to an extension portion 308. In some embodiments, the switch portion 306 may be coupled to the extension portion 308 via a joint 304. In this manner, in some embodiments, the switch portion 306 and the extension portion 308 may move freely relative to one another. In some embodiments, the joint 304 may allow limited relative movement between the switch portion 306 and the extension portion 308.

[0040] In some embodiments, joint 304 may include a suitable locking device or mechanism for selectively fixing the relative positions of switch portion 306 and extension portion 308. In some embodiments, arm 300 may include a locking device or mechanism for fixing distance 122 between first section 116 and second section 118 to maintain traction on catheter 112. In some embodiments, the locking device or mechanism may mechanically engage at least a portion of one or more arms 300 to maintain traction on catheter 112.

[0041] In some embodiments, the first end 314 of the extension portion 308 may be coupled to the first section 116 of the dressing 114, and the second end 316 of the extension portion 308 may be coupled to the joint 304. Similarly, in some embodiments, the switch portion 306 may include a first end 318 coupled to the second section 118 and a second end 320 coupled to the joint 304. In some embodiments, the first end 314 may be coupled to the first section 116 via any suitable fastening device or adhesive. In some embodiments, two or more extension portions 308 may be linked together at their first ends 314 and coupled to the first section 116. In some embodiments, the extension portion 308 of each arm 300 may be individually coupled to the first section 116.

[0042] In any event, in some embodiments, the first section 116 of the dressing 114 may be further configured to secure the catheter adapter 102 to the patient. In some embodiments, the catheter adapter 102 may include a side port 310 coupled to an extension set 312 to facilitate fluid infusion and / or blood withdrawal. In some embodiments, the catheter adapter 102 may be substantially aligned with the extension portion 308 of the arm 300 along the longitudinal axis 110. In this manner, in some embodiments, actuation of the arm 300 may pull on the catheter 112 extending from the distal end 106 of the catheter adapter 102. Some embodiments of one or more arms 300 may function as a toggle, actuating the arm 300 to adjust the distance 122 between the first section 116 and the second section 118 of the dressing 114.

[0043] 3B, some embodiments may include a sliding arm 300 or cam element 302 for mechanically coupling the first section 116 to the second section 118. As mentioned above, in some embodiments, the tether 130 may couple the first section 116 to the second section 118. Specifically, in some embodiments, the first end 132 of the tether 130 may be coupled or integral with the first section 116 and the second end 134 of the tether 130 may be coupled or integral with the second section 118.

[0044] Some embodiments of the cam element 302 may include tabs 314a, 314b disposed on opposite sides of the second end 134 of the tether 130. The tabs 314a, 314b may be coupled to the second end 134 of the tether 130 via rollers 316a, 316b or any suitable sliding element or mechanism. In operation, in some embodiments, the second end 134 of the tether 130 may taper in the proximal direction. In this manner, the tabs 314a, 314b may be squeezed inward, moving the tabs 314a, 314b toward each other in the proximal direction and simultaneously forcing the second end 134 of the tether 130 in the distal direction 318. This movement of the second end 134 of the tether 130 relative to the first end 132 of the tether 130 may reduce the distance between the first section 116 and the second section 118 of the dressing 114, thus pulling on the catheter 112 extending from the distal end 106 of the catheter adapter 102.

[0045] 4A-C , in some embodiments, the adjustment element 128 may include a tether 130 coupled to a toggle element 400. In some embodiments, one end 406 of the tether 130 may be coupled to the first section 116 of the dressing 114, and an opposite end 408 of the tether 130 may be coupled to the toggle element 400. In some embodiments, the toggle element 400 may be coupled to the second section 118 of the dressing 114.

[0046] Some embodiments may include a first base element 410a coupled to the first section 116 and a second base element 410b coupled to the second section 118 of the dressing 114. In some embodiments, the first base element 410a may be coupled to one end 406 of the tether 130 and may include a size and / or shape configured to receive and hold the catheter adapter 102 in a fixed position relative to the first section 116. The base element 410 coupled to the second section 118 may include a feature or mechanism for retaining the toggle element 400, such that the toggle element 400 can be moved between a first position 412 and a second position 414. In some embodiments, the opposite end of the tether 130 may be coupled to a midpoint of the toggle element 400. In some embodiments, the toggle element may be rod-shaped and configured to move bidirectionally to apply traction to the catheter 112.

[0047] For example, in some embodiments, the toggle element 400 can be configured to pivot in an axial direction substantially corresponding to the longitudinal axis 110. In this manner, in some embodiments, the toggle element 400 can be pivoted to a first axial position 412 of the toggle element 400 to apply traction to the catheter 112 and to a second axial position 414 to apply traction to and release traction from the catheter 112. In some embodiments, the toggle element 400 can be moved between the first axial position 412 and the second axial position 414 to gradually apply or release traction from the catheter 112 to adjust the position of the tip 120 of the catheter 112 within the vasculature. In some embodiments, the toggle element 400 can be secured in place by a locking element, such as a latch or other suitable device.

[0048] 5, some embodiments of adjustment element 128 may include a dial feature 500 configured to adjust distance 122 between first section 116 and second section 118 to apply traction to catheter 112. In some embodiments, dial feature 500 may include, for example, a toggle, ratchet, pulley, or other suitable device.

[0049] In some embodiments, the catheter adapter 102 may be coupled to the first section 116, and the dial mechanism 500 may be coupled to the second section 118. In some embodiments, the tether 130 may extend between the catheter adapter 102 and the dial mechanism 500. In some embodiments, the first end 132 of the tether 130 may be wound around the dial feature 500 such that the dial feature 500 may be manipulated to adjust the length of the tether 130. Specifically, in some embodiments, the indicator 506 of the dial feature 500 may be moved in a first direction 502 to tighten the tether 130, thereby shortening the distance 122 between the first section 116 and the second section 118 and applying traction to the catheter 112. Similarly, the indicator 506 may be moved in a second direction 504 to unwind the tether 130 and lengthen the distance 122, releasing traction on the catheter 112. Of course, in some embodiments, the tether 130 may be secured to an intermediate element between the first section 116 and the catheter adapter 102 and / or between the second section 118 and the dial feature 500.

[0050] 6A and 6B, in some embodiments, the catheter assembly 100 may include a dressing 114 whose first section 116 includes a pad 600 for securing the catheter adapter 102 relative to the patient. The pad 600 may include openings, adhesive, and / or other suitable securing mechanisms for receiving the catheter adapter 102 and securing the catheter adapter 102 relative to the pad 600 and the patient. In some embodiments, the catheter 112 may extend from the distal end 106 of the catheter adapter 102 through openings or other features of the pad 600 into the patient's vasculature. In some embodiments, the pad 600 may have a length sufficient to extend the length of the catheter 112 within the vasculature. In some embodiments, the pad 600 may include markings 608 indicating the approximate location of the catheter 112 below the pad 600.

[0051] In some embodiments, the second section 118 may include a secluded section of the dressing 114, such as a tab 606 coupled to the distal end 604 of the pad 600. In some embodiments, the pad 600 and the tab 606 may be monolithically formed as a single unit. In operation, the tab 606 may be pulled distally relative to the distal end 106 of the catheter adapter 102 to apply traction to the catheter 112. In some embodiments, the tab 606 may include an adhesive or other suitable mechanism, allowing the tab 606 to be selectively moved distally and secured in place to apply continuous traction to the catheter 112. In some embodiments, the markings 608 and / or the tab 606 may facilitate blood collection by indicating a desired or optimal location for a user to apply pressure to draw blood.

[0052] 7A, in some embodiments, a catheter assembly 100 for applying traction to a catheter 112 may include a catheter adapter 102, a catheter 112 extending from a distal end 106 of the catheter adapter 102, and a stabilizing element 700. Some embodiments of the stabilizing element 700 may be configured to slidably engage the catheter adapter 102.

[0053] For example, in some embodiments, one or more engagement features 704a, 704b may be disposed on a bottom surface of the catheter adapter 102 and may extend in a direction parallel to the longitudinal axis 110. In some embodiments, the stabilizing element 700 may be substantially planar and may include wings 708 configured to extend from the catheter adapter 102 transversely to the longitudinal axis 110. In some embodiments, the engagement features 704a, 704b may include slots 710 disposed on the bottom surface of the catheter adapter 102. Some embodiments of the wings 708 may be tapered to facilitate threading the stabilizing element 700 through the slots 710 so that the stabilizing element 700 may engage with the catheter adapter 102.

[0054] In some embodiments, the stabilizing element 700 may include one or more tracks 702a, 702b extending in a direction substantially parallel to the longitudinal axis 110 of the catheter adapter 102 when the stabilizing element 700 engages with the catheter adapter 102. In some embodiments, engaging the stabilizer element 700 with the catheter adapter 102 via the slot 710 may align the slot 710 with the track 702 of the stabilizing element 700. In some embodiments, the track 702 may include a protrusion, ridge, rib, slot, recess, indentation, or other suitable feature for engaging with an engagement feature 704 of the catheter adapter 102. Similarly, some embodiments of the engagement feature 704 may include a protrusion, ridge, rib, slot, indentation, indentation, or other suitable feature for engaging with one or more tracks 702 of the stabilizing element 700. In any event, in some embodiments, the one or more engagement features 704 may engage with the one or more tracks 702 to secure the stabilizing element 700 to the catheter adapter 102.

[0055] 7B and 7C , some embodiments of the engagement feature or slot 710 may slidably engage the track 702 of the stabilizing element 700 such that the catheter adapter 102 may move horizontally relative to the stabilizing element 700. In some embodiments, the stabilizing element 700 may include a size and / or contour that complements the size and / or contour of the catheter adapter 102, thereby promoting a snug fit at each end of the catheter adapter 102 and preventing undesired movement between the stabilizing element 700 and the catheter adapter 102. Some embodiments of the catheter adapter 102 may further include a tube or another suitable device or element to prevent relative movement between the catheter adapter 102 and the catheter 112 or the outer sleeve of the catheter 112. In this manner, some embodiments may maintain the lateral position of the catheter adapter 102 relative to the stabilizing element 700 while allowing the catheter adapter 102 to slide along the longitudinal axis 110. Some embodiments may further include a release button or other suitable mechanism for selectively releasing the catheter adapter 102 from the stabilizing element 700.

[0056] 7D , some embodiments may be configured so that the catheter adapter 102 can be adjusted vertically and / or horizontally relative to the stabilizing element 700. For example, in some embodiments, the stabilizing element 700 may include an angled profile 706 or other suitable shape or mechanism for adjusting the vertical height, tilt angle, and / or orientation of the catheter adapter 102 relative to the stabilizing element 700. In this manner, some embodiments of the catheter adapter 102 may be configured so that adjusting the vertical angle and / or orientation of the catheter adapter 102 relative to the stabilizer element 700 can apply traction to the catheter 112 within the vasculature. For example, as shown in FIG. 7D , in some embodiments, the catheter adapter 102 can be adjusted so that the distal end 106 of the catheter adapter 102 is tilted downward toward the patient and the proximal end 104 of the catheter adapter 102 is tilted upward.

[0057] 8 , alternative embodiments of the stabilizing element 700 may include a flexible linkage element 800 for adjusting the vertical height, angle, and / or orientation of the catheter adapter 102 relative to the stabilizing element 700. As shown, some embodiments of the flexible linkage element 800 may adjustably couple the catheter adapter 102 to one or more base portions 802 of the stabilizer element 700. In some embodiments, the flexible linkage element 800 may allow a user to manually adjust the vertical orientation and / or angle of the catheter adapter 102 relative to the base portion 802 in a controlled manner in order to apply traction to the catheter 112.

[0058] In some embodiments, the flexible linkage element 800 may comprise, for example, rubber, an elastomeric polymer, or other suitable flexible or resilient material and may allow controlled movement of the catheter adapter 102 relative to the base portion 802 of the stabilizing element 700. In some embodiments, the flexible linkage element 800 may comprise a short piece of tubing or one or more straps coupled to the base portion 802 of the stabilizing element 700 and extending beyond the top surface 804 of the catheter adapter 102 to retain the catheter adapter 102.

[0059] In some embodiments, one end of the flexible linkage element 800 may be coupled to a first base portion 802a of the stabilizing element 700, and a second end of the flexible linkage element 800 may be coupled to a second base portion 802b of the stabilizing element 700. In some embodiments, the first base portion 802 may be disposed on a first side 806a of the catheter adapter 102, and the second base portion 802b may be disposed on a second side 806b of the catheter adapter 102. Some embodiments of the flexible linkage element 800 may include shapes or contours that correspond to various external features of the catheter adapter 102.

[0060] 9 , some embodiments of the catheter assembly 100 may include a dressing 114 coupled to a tilting device 900 or other suitable feature to automatically adjust the angle of the catheter adapter 102 relative to the dressing 114. In some embodiments, the dressing 114 may include a foam pad-style dressing 114 with indentations or other suitable stabilizing features to stabilize the catheter adapter 102 therein. For example, some embodiments may include a dressing 114 such as the StatLock® IV stabilization device manufactured for the Becton-Dickinson Nexiva™ catheter 112. In either case, the dressing 114 may receive the catheter adapter 102 and hold the catheter adapter 102 in a substantially stable position relative to the dressing 114.

[0061] In some embodiments, the tilt device 900 may be coupled to the proximal side or end 118 of the stabilizing element 700. Some embodiments of the tilt device 900 may include one or more snap arms 906 for pivoting from an attachment point 908. In operation, some embodiments of the tilt device 900 may be pivoted distally forward and snap into place, with the distal end 106 of the catheter adapter 102 pivoted near the insertion site of the catheter 112. This may reduce the risk of kinking of the catheter 112 at the distal end 106 of the catheter adapter 102 while moving the tip 120 of the catheter 112 forward within the vasculature for improved blood access.

[0062] In other embodiments, the snap arms 906 may pivot proximally such that the snap arms 906 snap into place on the proximal side or end of the dressing 114. This may pivot the catheter adapter 102 back, lifting the distal end 106 of the catheter adapter 102 and moving the tip 120 of the catheter 112 proximally within the vasculature. In yet other embodiments, the tilt device 900 may rotate back and clip onto the proximal end 104 of the catheter adapter 102. In any event, in some embodiments, the tilt device 900 may reposition the angle of the catheter adapter 102, thereby repositioning the tip 120 of the catheter 112 within the vasculature.

[0063] 10A and 10B, in some embodiments, the catheter assembly 100 may include a dressing 114 for receiving the catheter adapter 102 and a traction mechanism 1000 coupled to the dressing 114 for consistently applying traction to the catheter 112 extending from the catheter adapter 102. As shown in FIG. 10A, in some embodiments, the dressing 114 may include a contoured stabilizing pad 1008 for receiving and stabilizing the catheter adapter 102 and / or a stabilizing element 700 coupled to the catheter adapter 102.

[0064] Some embodiments of the traction mechanism 1000 may be coupled to the stabilization pad 1008 at a location substantially corresponding to the location of the catheter 112. In some embodiments, the traction mechanism 1000 may include an anchor point 1006 located on either side of or near the proximal end of the catheter 112. In some embodiments, the traction arm 1002 may extend distally from the anchor point 1006 parallel to the catheter 112. In some embodiments, a traction plate 1004 extending substantially transverse to the traction arm 1002 may be coupled to or integral with the distal end of the traction arm 1002. In some embodiments, the traction plate 1004 may provide a distal anchor point for the traction mechanism 1000.

[0065] During operation, in some embodiments, the retraction arms 1002 may be compressed inward to straighten or deform the profile of each of the retraction arms 1002 in an inward direction relative to the catheter 112. In some embodiments, the application of this force may apply a controlled traction to the catheter 112 to open a fluid pathway within the vasculature.

[0066] 11 , in an alternative embodiment, the traction mechanism 1000 may include one or more traction arms 1002 configured to be depress or displaced downwardly relative to the catheter 112. In some embodiments, this downwardly applied force may extend the traction mechanism 1000, thereby extending the distance between an anchor point 1006 located adjacent the proximal end of the catheter 112 and a traction plate 1004 located adjacent the tip 120 of the catheter 112. In this manner, the traction mechanism 1000 may be actuated to consistently apply traction to the catheter 112.

[0067] 12 and 13 , in some embodiments, the first section 116 of the dressing 114 may include contours, adhesive, and / or other features to hold the catheter adapter 102 in a substantially fixed position relative to the patient. The second section 118 of the dressing 114 may be spaced apart from the first section 116 and may be substantially fixed relative to the patient via an adhesive or other suitable device or mechanism. Thus, in some embodiments, a substantially fixed distance 122 may separate the first section 116 and the second section 118.

[0068] In some embodiments, the traction mechanism 1000 may be coupled to the first section 116 of the dressing 114 and may be configured to attach to the second section 118 of the dressing 114 to adjust the distance between the first section 116 and the second section 118. In some embodiments, the traction mechanism 1000 may include an adjustable snap feature 1200 for adjusting the distance between the first section 116 and the second section 118. In this manner, some embodiments of the snap feature 1200 may apply a consistent traction to the catheter 112.

[0069] 12 , in some embodiments, the traction mechanism 1000 may include a tensioning strap 1204 coupled to the first section 116 of the dressing 114. In some embodiments, the tensioning strap 1204 may be monolithically formed as a single unit with the first section 116 of the dressing 114. In some embodiments, the catheter adapter 102 and / or the stabilizing element 700 may be coupled to the tensioning strap 1204. In other embodiments, the tensioning strap 1204 may substantially surround the catheter adapter 102 and / or the stabilizing element 700.

[0070] In any event, some embodiments of the tension strap 1204 may include a snap feature 1200 coupled to or integrated into the distal end of the tension strap 1204. In some embodiments, the snap feature 1200 may include an extension or tab having one or more snap caps 1206 disposed along the length of the snap feature 1200. In some embodiments, each snap cap 1206 may be configured to couple to a socket 1202 coupled to or integrated into the second section 118 of the dressing 114. In some embodiments, the second section 118 may include multiple sockets 1202 such that one or more of the snap caps 1206 can be adjustably coupled to one or more of the sockets 1202. In this manner, in some embodiments, the tension strap 1204 may be tightened and / or loosened relative to the second section 118 of the dressing 114 to adjust the traction applied to the catheter 112 in a controlled manner.

[0071] 13 , in some embodiments, the tension strap 1204 or dressing 114 may include an alternative connection feature 1300, such as a clasp, a button, a hook-and-loop fastener (such as Velcro®), an adhesive, or other suitable fastening device or feature. As shown, in some embodiments, the connection feature 1300 may include a first connector element 1302 coupled to the first section 116 of the dressing 114 and a second connector element 1304 coupled to the second section 118 of the dressing 114. In some embodiments, the first connector element 1302 and / or the second connector element 1304 may be adjustable to adjust the distance 122 between the first section 116 of the dressing 114 and the second section 118 of the dressing 114. In some embodiments, the first connector element 1302 and the second connector element 1304 may interlock or otherwise couple together to reduce the distance 122 between the first section 116 and the second section 118, thereby applying traction to the catheter 112 in a consistent manner.

[0072] All examples and conditional language set forth herein are intended for educational purposes to aid in understanding the invention and concepts provided by the inventor to further the technology, and should be construed as not being limited to the specifically recited examples and conditions. Although 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. 1. A catheter assembly for applying traction to a catheter, comprising: a catheter adapter having a proximal end, a distal end, and a lumen extending along a longitudinal axis between the proximal end and the distal end; a catheter extending from the distal end of the catheter adapter; a dressing for applying traction to the catheter in response to the catheter being placed within a patient's vasculature, the dressing comprising: a first section coupled to a second section by an adjustment element, the adjustment element configured to adjust a distance between the first section and the second section, the first section configured to secure at least one of the catheter adapter and the catheter to the patient, and the second section configured to be adjustably secured to the patient and relative to the first section to apply traction to the catheter within the vasculature; A catheter assembly comprising:

2. The catheter assembly of claim 1 , wherein the first section and the second section are independent of each other.

3. The catheter assembly of claim 1 , wherein the first section includes an opening for receiving at least a portion of at least one of the catheter adapter and the catheter.

4. The catheter assembly of claim 1 , wherein the first section comprises an adhesive for securing at least one of the catheter adapter and the catheter to the patient.

5. The catheter assembly of claim 1 , wherein the second section is further configured to be fixed relative to the patient.

6. The catheter assembly of claim 1 , wherein the adjustment element is releasable to decouple the first section and the second section.

7. 2. The catheter assembly of claim 1, wherein the adjustment element comprises at least one tether having a first end coupled to the first section and a second end coupled to the second section, each of the at least one tether configured to be selectively tightened to apply traction to the catheter.

8. 2. The catheter assembly of claim 1, wherein the adjustment element comprises a first finger grip coupled to at least one of the first section and the catheter adapter and a second finger grip coupled to the second section, the second section being configured to be manually adjusted relative to the first section to apply traction to the catheter.

9. 2. The catheter assembly of claim 1, wherein the adjustment element comprises at least one arm extending between the first section and the second section, and wherein manipulating the position of the at least one arm adjusts the distance between the first section and the second section and applies traction to the catheter.

10. The catheter assembly of claim 9, further comprising a locking element for fixing the distance between the first section and the second section to maintain traction on the catheter.

11. The catheter assembly of claim 10 , wherein the locking element mechanically engages at least a portion of the at least one arm to maintain traction on the catheter.

12. The catheter assembly of claim 9 , wherein the at least one arm includes at least one joint for depressing the arm inward toward the longitudinal axis to apply traction to the catheter.

13. 10. The catheter assembly of claim 9, wherein the at least one arm comprises a switch portion movably coupled to an extension portion, and wherein moving the switch portion in a direction parallel to the longitudinal axis and away from the first section shortens the distance between the first section and the second section, applying traction to the catheter.

14. 10. The catheter assembly of claim 9, wherein the adjustment element comprises a dial feature coupled to the at least one arm, and rotating the dial feature adjusts the distance between the first section and the second section to apply traction to the catheter.

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