Dressing-based catheter traction device and related system

Abstract

A catheter assembly according to the present invention may include a catheter adapter (102), a catheter (112) placed within a patient's vascular system, and a dressing (114) for stably applying traction to the catheter. The catheter adapter may include a proximal end, a distal end, and a lumen extending between the proximal end and the distal end. The catheter may extend from the distal end of the catheter adapter. The dressing may include a first section (116) adjustably coupled to a second section (118). The first section may be configured to secure the catheter adapter and / or the catheter to the patient. The second section may be configured to be adjustably positioned relative to the first section to apply traction to the catheter within the vascular system.

Description

Technology Field

[0001] The present invention relates to a catheter traction device and a system related thereto. Background Technology

[0002] Catheters are commonly used in various infusion therapies. For example, catheters can be used to infuse fluids such as ordinary saline, various medications, and parenteral nutrition to patients. Additionally, catheters can be used to draw blood from patients to obtain blood samples.

[0003] A common type of catheter is the over-the-needle peripheral intravenous ("IV") catheter. As the name implies, an over-the-needle catheter can be mounted on an introducer needle equipped with a sharp distal tip. When the catheter and introducer needle are assembled, the distal tip of the introducer needle extends beyond the distal tip of the catheter, with the bevel of the needle pointing upward away from the patient's skin. The catheter and introducer needle are generally inserted through the skin into the patient's vascular system at an acute angle.

[0004] To verify the correct positioning of the introduction needle and / or catheter within the blood vessel, medical personnel typically check for a "flashback" of blood in the flashback chamber of the catheter assembly. Once the position of the needle is confirmed, medical personnel may temporarily block the flow within the blood vessel and remove the needle, leaving the catheter in place for future blood extraction, fluid infusion, or probe access.

[0005] However, functional impairment of the catheter may occur for several reasons. For example, when a catheter is maintained within the blood vessel for an extended period, the ability of blood to flow under vacuum pressure is significantly reduced. Blockage of the catheter due to the presence of a blood clot near the catheter tip and / or the vein wall is a major cause of fluid flow obstruction during the period the catheter is maintained within the blood vessel. Consequently, while the catheter is commonly used for blood collection during the initial placement, it is less frequently used for blood collection during the catheter maintenance period.

[0006] If a blood sample is required during the catheterization period, an additional needle stick is typically used to provide venous access for blood collection; this not only causes additional pain and concern for the patient but also increases material costs. Applying traction to move or reposition the catheter within the vein can improve the success rate of blood extraction. While traditional traction application techniques vary significantly, they all require manual manipulation of the catheter adapter. Consequently, these methods are notoriously inconsistent and can lead to catheter contamination and / or dislodgement.

[0007] The subject matter claimed herein is not limited to embodiments that operate only under the conditions described above or embodiments that solve the problems described above. Rather, the background art is merely intended to present an exemplary technical field in which some of the embodiments described herein may be implemented. Prior art literature

[65535] U.S. Patent Publication US9,248,258 (February 2, 2016) U.S. Patent Application Publication US2012 / 0016312 (January 19, 2012) The problem to be solved

[0008] The present invention aims to improve a device for catheter traction and a system related thereto. means of solving the problem

[0009] The present invention relates to a catheter assembly generally used for fluid infusion into a patient's vascular system and / or blood collection from a patient's vascular system. Various complex problems and disorders can impede fluid flow through a catheter, which may lead to a deterioration in the catheter's function and performance. For example, when a catheter is maintained within a vascular system for a long period, the ability of blood to flow under vacuum pressure is significantly reduced. Blockage of the catheter due to the presence of a blood clot near the catheter tip and / or the vein wall is a major cause of fluid flow obstruction that occurs during the period the catheter is maintained within the vascular system. By providing traction to move or reposition the catheter tip within the vein, the catheter's function and the success rate of blood extraction can be significantly improved.

[0010] In some embodiments, a catheter assembly applying traction to a catheter may include a catheter adapter having a proximal end, a distal end, and a lumen extending along the 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 placed within the patient's blood vessel. In some embodiments, the dressing may include a first section adjustablely coupled to a second section. In some embodiments, the first section may be configured to secure the catheter adapter and / or catheter to the patient, and the second section may be configured to be adjustablely secured to the first section. With such a configuration, in some embodiments, the dressing may apply traction to the catheter within the blood vessel.

[0011] In some embodiments, the first section and the second section may be independent of each other. In some embodiments, the first section includes an aperture that accommodates at least a portion of at least one of the catheter adapter and the catheter. In some embodiments, the first section may include an adhesive that secures at least one of the catheter adapter and the catheter to the patient. Similarly, in some embodiments, the second section may be configured to be secured to the patient.

[0012] In some embodiments, the catheter assembly may further include an adjustment element that adjustably connects the first section to the second section. In some embodiments, the adjustment element may be releaseable to separate the first section and the second section. In some embodiments, the adjustment element may include at least one tether having a first end connected to the first section and a second end connected to the second section. Each of the at least one tether may be configured to be optionally tightened to apply traction to the catheter.

[0013] In some embodiments, the adjustment element may include 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. According to such a configuration, in some embodiments, the second section may be configured to enable manual adjustment 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, the distance between the first section and the second section providing traction to the catheter may be adjusted by manipulating the position of the at least one arm.

[0014] In some embodiments, the catheter assembly may further include a lock element that fixes the distance between the first section and the second section to maintain traction in the catheter. In some embodiments, the lock element may mechanically engage with at least a portion of the at least one arm to maintain traction in the catheter.

[0015] In some embodiments, the arm may include at least one joint. In some embodiments, traction force may be applied to the catheter by pressing the arm inward toward the longitudinal axis.

[0016] In some embodiments, each of the at least one arm may include a switching portion movably coupled to an extension. By moving the switching portion away from the first section in a direction parallel to the longitudinal axis, the distance between the first section and the second section applying traction to the catheter may be shortened. In some embodiments, the adjustment element may include a dial feature coupled to the at least one arm. By rotating the dial feature, the distance between the first section and the second section applying traction to the catheter may be adjusted.

[0017] A catheter assembly for applying traction to a catheter according to some embodiments may comprise: a catheter adapter comprising 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 and configured to be placed within the vascular system of a patient; and a stabilizer element configured to engage in a sliding manner with the catheter adapter element, wherein the stabilizer element comprises at least one track substantially parallel to the longitudinal axis, and the stabilizer element maintains a lateral position of the catheter adapter while allowing the catheter adapter to slide along the at least one track in a direction parallel to the longitudinal axis.

[0018] In some embodiments, the catheter adapter may include at least one engagement feature extending parallel to the longitudinal axis. In some embodiments, the at least one engagement feature may engage slidingly with the at least one track. In some embodiments, the stabilizing element may be configured to adjust the angle of the catheter adapter relative to the patient to apply traction to the catheter within the vascular system.

[0019] In some embodiments, a catheter assembly for applying traction to a catheter may comprise: a catheter adapter comprising 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 and configured to be placed within the patient's vascular system; and a dressing configured to secure the catheter adapter to the patient, wherein the dressing comprises an incline mechanism configured to adjust the angle of the catheter adapter relative to the stabilizing element to apply traction to the catheter within the vascular system, and a stabilizing element that holds the catheter adapter. In some embodiments, the incline mechanism may comprise a flexible linkage element configured to enable manual adjustment of the angle of the catheter adapter relative to the stabilizing element.

[0020] It should be understood that the general description foregoing and the detailed description below are illustrative and provided for illustrative purposes only, and do not limit the invention as described in the claims. It should be understood that the various embodiments are not limited to the devices and apparatuses depicted in the drawings. Furthermore, it should be understood that, unless otherwise stated in the claims, embodiments may be combined, other embodiments may be utilized, and structures may be changed within the scope of the claims. Accordingly, the detailed description below should not be understood as limiting the invention. Brief explanation of the drawing

[0021] Below, exemplary embodiments of the present invention will be described in detail with reference to the attached drawings. FIG. 1 shows a top view of an exemplary catheter assembly including an exemplary dressing for applying traction to a catheter according to some embodiments. FIG. 2a shows a top view of an exemplary dressing and other exemplary catheter assembly for applying traction to a catheter according to some embodiments. Figure 2b shows a side view of the catheter assembly of Figure 2a. FIG. 3a shows a top view of an exemplary catheter assembly including an exemplary dressing including a toggle element according to some embodiments. FIG. 3b shows a top view of the catheter assembly of FIG. 3a, in which a dressing is positioned to apply traction to the catheter according to some embodiments. FIG. 4a shows a side view of another exemplary catheter assembly including another exemplary dressing according to some embodiments. FIG. 4b shows a side view of the catheter assembly of FIG. 4a, in which the adjustment of the dressing according to some embodiments is shown. FIG. 4c shows a side view of the catheter assembly of FIG. 4a, in which a dressing is positioned to apply traction to the catheter according to some embodiments. FIG. 5a shows a top view of another exemplary catheter assembly including another exemplary dressing according to some embodiments. FIG. 5b shows a top view of the catheter assembly of FIG. 5a, in which a dressing is positioned to apply traction to the catheter according to some embodiments. FIG. 6a shows a top view of another exemplary catheter assembly including another exemplary dressing according to some embodiments. FIG. 6b shows a top view of the catheter assembly of FIG. 6a, wherein, according to some embodiments, the catheter assembly is positioned to apply traction to the catheter. FIG. 7a shows a top view of an exemplary dressing and an exemplary catheter assembly including an exemplary stationary base element according to some embodiments. Figure 7b shows a side view of the catheter assembly of Figure 7a. Figure 7c shows a side view of the catheter assembly of Figure 7a, where the catheter assembly is positioned to apply traction to the catheter. FIG. 7d shows a side view of the catheter assembly of FIG. 7a, wherein the catheter assembly includes other exemplary static base elements according to some embodiments. FIG. 8 shows a perspective view of an exemplary stabilization element and an exemplary catheter adapter according to some embodiments. FIG. 9 shows a top perspective view of another exemplary catheter assembly having another exemplary dressing according to some embodiments. FIG. 10a shows a perspective view of another exemplary dressing and another exemplary catheter assembly applying traction to a catheter according to some embodiments. Figure 10b shows a top view of the dressing and catheter assembly of Figure 10a. FIG. 11 shows a side view of an exemplary dressing and an exemplary catheter assembly according to some embodiments. FIG. 12 shows a top view of another exemplary dressing and another exemplary catheter assembly for applying traction to a catheter according to some embodiments. FIG. 13 shows a top view of another exemplary dressing and another exemplary catheter assembly according to some embodiments. Specific details for implementing the invention

[0022] In this document, the term "distal" refers to the direction moving away from the medical professional positioning the device in contact with the patient and toward the patient. The term "proximal" refers to the direction moving closer to the medical professional positioning the device in contact with the patient and toward the patient. Therefore, for example, the end of the catheter that first comes into contact with the patient's body is the distal end, and the opposite end of the catheter is the proximal end.

[0023] As previously mentioned, various complex problems and obstacles may arise that impede fluid flow through the catheter, particularly when the catheter is maintained within the patient's vascular system for an extended period. Blockage of the catheter due to a blood clot near the catheter tip and / or the vein wall is a primary cause of impaired fluid flow through the catheter. By applying traction to move or reposition the catheter tip within the vein, the catheter's function and the success rate of blood extraction can be significantly improved.

[0024] However, medical professionals tend to use traction application techniques that they feel most comfortable with, leading to significant variations in the techniques and their outcomes. Furthermore, many traction application methods involve manual manipulation of catheter adapters, which simultaneously carries the risk of catheter contamination and dislodgement.

[0025] This invention describes several concepts that enable the application of consistent traction through a dressing placed over a catheter. The traction applied through the dressing avoids manual manipulation of the catheter, thereby enhancing the continuity of the maintained catheter by minimizing the possibility of contamination and dislodgement. Furthermore, some embodiments provided herein facilitate the consistent application of traction, thereby increasing the success rate of blood extraction.

[0026] Now, referring to FIG. 1, a catheter assembly (100) according to some embodiments is 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 the longitudinal axis (110) between them.

[0027] The 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 collection, fluid delivery, patient or device monitoring, or other medical needs. In some embodiments, the catheter (112) includes, for example, a peripheral venous catheter, a peripherally-inserted central catheter, or a midline catheter. In some embodiments, the catheter (112) may be retained within the bloodstream after having previously been inserted into the patient's bloodstream.

[0028] In some embodiments, the dressing (114) may apply a firm traction force to the catheter (112) while the catheter (112) is placed within the patient's vascular system. In some embodiments, the dressing (114) may include an adhesive (126) that secures the dressing (114) to the patient. In some embodiments, the dressing (114) may include two members or two sections of the dressing (114) connected by an adjustment element (128). In some embodiments, the dressing (114) may include two or more sections and may be connected by at least one adjustment element (128), such as an adjustable tether (130) or other suitable fastener or strap.

[0029] In some embodiments, some or each of the sections of the dressing (114) may be spaced apart from each other by a distance (122). The distance (122) between the sections of the dressing (114) may be selected to optimize the application of traction force to the catheter (112). For example, in operation, in some embodiments, traction force to the catheter (112) may be applied by adjusting the distance (122) between two or more members or sections of the dressing (114). In some embodiments, the distance (122) between the sections of the dressing (114) may be adjusted automatically or manually by an adjustment element (128). In some embodiments, by adjusting the distance (122) between the sections of the dressing (114) in this manner, tension may be applied between the sections of the dressing (114) to apply traction force to the catheter (112).

[0030] In some embodiments, the dressing (114) may include a first section (116) that is adjustablely 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, a winch, a ratchet, a pulley, a dial, a screw, a cable tie, or other suitable tensioning device or mechanism. Some embodiments of the adjustment element (128) may be releaseable and / or removable to separate the first section (116) and the second section (118).

[0031] In some embodiments, the first section (116) may be independent of the second section (118). Some embodiments of the first section (116) secure the catheter adapter (102) and / or catheter (112) to the patient, for example, by an adhesive (126), and / or maintain the position of the catheter adapter (102) and / or catheter (112). In some embodiments, the first section (116) may include a through hole (124) or other suitable structure or mechanism to hold the catheter adapter (102) and / or catheter (112) in a substantially fixed position relative to the patient.

[0032] In some embodiments, the second section (118) may be fixed to and / or adjustablely positioned relative to the first section (116) to apply traction to the catheter (112) within the vascular system. In some embodiments, an adhesive (126) or other suitable device or mechanism may be included to maintain the position of the second section (118) relative to the patient and / or to secure the second section (118) to the patient. Some embodiments of the second section (118) may include a fixing device or mechanism to maintain the position of the second section (118) relative to the first section (116) and / or to secure the second section (118).

[0033] In some embodiments, the position of the second section (118) relative to the first section (116) may be adjusted by an adjustment element (128). In some embodiments, as illustrated in FIG. 1, the adjustment element (128) may include one or more tethers (130) to join the sections (116, 118) of the dressing (114) together. In some embodiments, a first end (132) of the tether (130) may be joined to the first section (116), and a second end (134) of the tether (130) may be joined to the second section (118).

[0034] In some embodiments, the tethers (130) are configured to be individually adjustable so that each tether (130) can individually apply a traction force to pull the catheter (112). In some embodiments, the tethers (130) may be configured to be collectively adjusted as a single unit to apply a traction force to pull the catheter (112). In some embodiments, each tether (130) can apply a traction force to pull the catheter (112) in a proximal or distal direction.

[0035] In some embodiments, the tightening of the tethers (130) may pull the patient's skin, thereby allowing the tip (120) of the catheter (112) to be repositioned within the blood vessel. In some embodiments, by repositioning the tip (120) of the catheter (112) within the blood vessel in this manner, the fluid path for the infusion of fluid or medicine or blood extraction may be cleared. In some embodiments, the adjusting element (128) may be adjusted or loosened automatically or manually to restore the dressing (114) to its initial position, thereby releasing the traction force on the catheter (112).

[0036] Now, referring to FIG. 2, in some embodiments, to facilitate manual adjustment of the second section (118) of the dressing (114) to the first section (116) of the dressing (114), the adjustment element (128) may include one or more finger grips (200, 202). 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 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).

[0037] When operating, a medical professional may utilize a first finger grip (200) to adjust or maintain the position of the first section (116) relative to the patient, while utilizing a second finger grip (202) to adjust or maintain the position of the second section (118) relative to the first section (116). In some embodiments, while the first finger grip (200) is utilized to maintain the position of the first section (116), the position of the second section (118) relative to the first section (116) may be adjusted by the second finger grip (202).

[0038] In some embodiments, the first finger grip (200) is utilized to adjust the position of the first section (116) in a proximal or distal direction, while at the same time, the position of the second section (118) can be adjusted in the opposite direction by the second finger grip (202). In some embodiments, the first finger grip (200) and / or the second finger grip (202) may be utilized to adjust the tilt angle, inclination angle, or other position or orientation of the first section (116) relative to the second section (118). In some embodiments, using one or more of the first finger grip (200) and the second finger grip (202) to manually adjust the position of the first section (116) relative to the second section (118) in this manner may involve applying a traction force to the catheter (112) to reposition the tip (120) of the catheter (112) within the vascular system, thereby opening the fluid path.

[0039] Now, referring to FIG. 3, in some embodiments, the adjusting element (128) may include one or more arms (300) extending between the first section (116) and the second section (118). In some embodiments, by manipulating the position and / or orientation of one or more arms (300), the distance (122) between the first section (116) and the second section (118) may be adjusted, thereby allowing traction to be applied to the catheter (112).

[0040] Some embodiments of the arm (300) may include one or more joints (304) that enable relative movement between the segments of the arm (330). As illustrated in FIG. 3a, in some embodiments, the arm (300) may include a transition part (306) movably coupled to an extension part (308). In some embodiments, the transition part (306) may be coupled to the extension part (308) by a joint (304). In some embodiments, in this manner, the transition part (306) and the extension part (308) are made to move freely relative to each other. In some embodiments, the joint (304) may allow limited relative movement between the transition part (306) and the extension part (308).

[0041] In some embodiments, the joint (304) may include a suitable locking device or mechanism for selectively fixing the relative positions of the transition portion (306) and the extension portion (308). In some embodiments, the arm (300) may include a locking device or mechanism for fixing the distance (122) between the first section (116) and the second section (118) to maintain traction on the catheter (112). In some embodiments, the locking device or mechanism may be mechanically engaged with at least a portion of one or more arms (300) to maintain traction on the catheter (112).

[0042] In some embodiments, a first end (314) of the extension (308) may be joined to a first section (116) of the dressing (114), and a second end (316) of the extension (308) may be joined to a joint (304). Similarly, in some embodiments, the transition (306) may include a first end (318) joined to a second section (118) and a second end (320) joined to a joint (304). In some embodiments, the first end (314) may be joined to the first section (116) by any suitable fastening device or adhesive. In some embodiments, one or more extensions (308) may be joined to the first section (116) after being gathered together at their first ends (314). In some embodiments, the extensions (308) of each arm (300) may be joined individually to the first section (116).

[0043] In any case, 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 extraction. In some embodiments, the catheter adapter (102) is substantially aligned with the extensions (308) of the arms (300) along the longitudinal axis (110). In this way, in some embodiments, a traction force may be applied to the catheter (112) extending from the distal end (106) of the catheter adapter (102) due to the operation of the arms (300). Some embodiments of one or more arms (300) may operate in a toggle manner, so that the distance (122) between the second section (118) and the first section (116) of the dressing (114) can be adjusted by the operation of the arms (300).

[0044] Now, referring to FIG. 3b, some embodiments may include a cam element (302) or a sliding arm (300) that mechanically links the first section (116) to the second section (118). As previously described, in some embodiments, a tether (130) may link the first section (116) to the second section (118). Specifically, in some embodiments, a first end (132) of the tether (130) may be linked or integrated with the first section (116), and a second end (134) of the tether (130) may be linked or integrated with the second section (118).

[0045] 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) by rollers (316a, 316b) or any suitable sliding element or mechanism. When operated, in some embodiments, the second end (134) of the tether (130) may be tapered in the proximal direction. In this manner, the tabs (314a, 314b) may be moved toward each other in the proximal direction by gripping inward, and at the same time, the second end (134) of the tether (130) is deflected 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) can reduce the distance between the first section (116) and the second section (118) of the dressing (114), thereby enabling the application of a traction force to the catheter (112) extending from the distal end (106) of the catheter adapter (102) to pull it.

[0046] Now, referring to FIGS. 4a through 4c, 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 a first section (116) of the dressing (114), and the 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 a second section (118) of the dressing (114).

[0047] Some embodiments may include a first base element (410a) coupled to a first section (116) and a second base element (410b) coupled to a 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 have a size and / or shape configured to accommodate a catheter adapter (102) and to 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 structure or mechanism that holds the toggle element (400) so 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 connected to the midpoint of the toggle element (400). In some embodiments, the toggle element may have a rod shape and may be configured to move in both directions to apply traction force to the catheter (112).

[0048] For example, in some embodiments, the toggle element (400) may be configured to pivot axially in a direction substantially corresponding to the longitudinal axis (110). With such a configuration, in some embodiments, the toggle element (400) may pivot to a first axial position (412) of the toggle element (400) for applying traction force to the catheter (112) and to a second axial position (414) for releasing traction force from the catheter (112). In some embodiments, the toggle element (400) may be moved between the first axial position (412) and the second axial position (414) to gradually apply or release traction force to the catheter (112) in order to adjust the position of the tip (120) of the catheter (112) within the vascular system. In some embodiments, the toggle element (400) may be secured in place by a locking element, such as a latch or other suitable device.

[0049] Now, referring to FIG. 5, some embodiments of the adjustment element (128) may include a dial structure (500) configured to adjust the distance (122) between the first section (116) and the second section (118) to apply traction to the catheter (112). In some embodiments, the dial structure (500) may include, for example, a toggle, a ratchet, a pulley, or other suitable device.

[0050] In some embodiments, the catheter adapter (102) may be coupled to the first section (116), and the dial structure (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 structure (500). In some embodiments, the first end (132) of the tether (130) may be wound around the dial structure (500) so that the dial structure (500) can be operated to adjust the ging of the tether (130). Specifically, in some embodiments, an indicator (506) on the dial structure (500) may be moved in a first direction (502) to wind the tether (130) more tightly, thereby shortening the distance (122) between the first section (116) and the second section (118) and applying traction to the catheter (112). Similarly, to lengthen the distance (122) and release the traction on the catheter (112), the indicator (506) may be moved in a second direction (504) so ​​that the tether (130) is unwound. Of course, in some embodiments, the tether (130) may be fixed to an intermediate element between the second section (118) and the catheter adapter (102) and / or between the second section (118) and the dial structure (500).

[0051] Now, referring to FIGS. 6a and 6b, in some embodiments, the catheter assembly (100) includes a dressing (114), wherein the first section (116) includes a pad (600) that secures the catheter adapter (102) to the patient. The pad (600) may include a through hole, an adhesive, and / or other suitable fasteners to receive the catheter adapter (102) and to secure the catheter adapter (102) 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) into the patient's vascular system through the through hole or another pad (600). In some embodiments, the pad (600) may have a length sufficient to extend over the length of the catheter (112) within the vascular system. In some embodiments, the pad (600) may include a label (608) indicating the approximate location of the catheter (112) under the pad (600).

[0052] In some embodiments, the second section (118) may include a tab (606) attached to an isolated portion of the dressing (114), for example, the distal end (604) of the pad (600). In some embodiments, the pad (600) and the tab (606) may be formed as a single unit. When operated, the tab (606) may be pulled distally against the distal end (106) of the catheter adapter (102) to apply traction to the catheter (112). In some embodiments, an adhesive or other suitable mechanism may be included to enable the tab (606) to be selectively moved distally and also to be fixed in place to apply continuous traction to the catheter (112). In some embodiments, the label (608) and / or the tab (606) facilitate blood extraction by indicating the desired or optimal location where a medical professional will apply pressure for blood extraction.

[0053] Now, referring to FIG. 7a, in some embodiments, a catheter assembly (100) that applies 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 engage in a sliding manner with the catheter adapter (102).

[0054] For example, in some embodiments, one or more interlocking structures (704a, 704b) may be disposed on the 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 include wing portions (708) configured to be substantially planar and extend laterally from the catheter adapter (102) with respect to the longitudinal axis (110). In some embodiments, the interlocking structures (704a, 704b) may include a slot (710) disposed on the bottom surface of the catheter adapter (102). Some embodiments of the wing portion (708) may be tapered to facilitate screw connection of the stabilizing element (700) through the slot (710) so that the stabilizing element (700) can interlock with the catheter adapter (102).

[0055] In some embodiments, the stabilizing element (700) may include at least one track (702a, 702b) extending in a direction substantially parallel to the longitudinal axis (110) of the catheter adapter (102) when the stabilizing element (700) is engaged with the catheter adapter (102). In some embodiments, by engaging the stabilizing element (700) with the catheter adapter (102) through the slot (710), the slot (710) may be aligned with the track (702) of the stabilizing element (700). In some embodiments, the tracks (702) may include a protrusion, a ridge, a rib, a slot, a hollow, a depression, or other suitable structure to engage with the engagement structure (704) of the catheter adapter (102). Similarly, some embodiments of the interlocking structure (704) may include a protrusion, ridge, rib, slot, recess, depression, or other suitable structure for interlocking with at least one track (702) of the stabilizing element (700). In any case, in some embodiments, the at least one interlocking structure (704) interlocks with at least one track (702) to secure the stabilizing element (700) to the catheter adapter (102).

[0056] Now, referring to FIGS. 7b through 7c, some embodiments of the interlocking structure or slot (710) may slide into the track (702) of the stabilizing element (700) so that the catheter adapter (102) can move horizontally relative to the stabilizing element (700). In some embodiments, the stabilizing element (700) may have a size and / or contour that compensates for the size and / or contour of the catheter adapter (102), thereby enhancing a snug fit at each end of the catheter adapter (102) and preventing unwanted movement between the stabilizing element (700) and the catheter adapter (102). Some embodiments of the catheter adapter (102) may further include a tube or other suitable device or element that prevents relative movement between the catheter (112) or the outer sleeve of the catheter (112) and the catheter adapter (102). According to this configuration, the lateral position of the catheter adapter (102) relative to the stabilizing element (700) can be maintained, while the catheter adapter (102) can slide along the longitudinal axis (110). Some embodiments may further include a release button or other suitable mechanism for releasing the catheter adapter (102) from the stabilizing element (700) as a selection.

[0057] Now, referring to FIG. 7d, some embodiments are configured such that the catheter adapter (102) can be adjusted vertically and / or horizontally with respect to the stabilizing element (700). For example, in some embodiments, the stabilizing element (700) may include an angle contour (706) or other suitable shape or mechanism for adjusting the vertical height, inclination angle, and / or orientation of the catheter adapter (102) with respect to the stabilizing element (700). According to such configuration, some embodiments of the catheter adapter (102) may be configured such that a traction force is applied to the catheter (112) in the vascular system by adjusting the vertical angle and / or orientation of the catheter adapter (102) with respect to the stabilizing element (700). For example, as illustrated in FIG. 7d, in some embodiments of the catheter adapter (102), the distal end (106) of the catheter adapter (102) may be configured to tilt downward toward the patient, and the angle of the proximal end (104) of the catheter adapter (102) may be tilted upward.

[0058] Now, referring to FIG. 8, an alternative embodiment of the stabilization element (700) may include a flexible link element (800) for adjusting the vertical height, angle, and / or orientation of the catheter adapter (102) relative to the stabilization element (700). As illustrated, the flexible link element (800) of some embodiments may flexibly connect the catheter adapter (102) to one or more base portions (802) of the stabilization element (700). In some embodiments, due to the flexible link element (800), the user may manually adjust the vertical orientation and / or angle of the catheter adapter (102) relative to the base portions (802) in a controlled manner to apply traction to the catheter (112).

[0059] In some embodiments, the flexible link element (800) may comprise, for example, rubber, an elastomer polymer, or other suitable flexible or elastic material to enable controlled movement of the catheter adapter (102) relative to the base portion (802) of the stabilizing element (700). In some embodiments, the flexible link element (800) may comprise one or more short pieces of straps or tubes coupled to the base portion (802) of the stabilizing element (700), which may extend over the upper surface (804) of the catheter adapter (102) for retention of the catheter adapter (102).

[0060] In some embodiments, one end of the flexible link element (800) may be coupled to a first base portion (802a) of the stabilizing element (700), and a second end of the flexible link element (800) may be coupled to a second base portion (802b) of the stabilizing element (700). In some embodiments, the first base portion (802a) may be positioned on a first side (806a) of the catheter adapter (102), and the second base portion (802b) may be positioned on a second side (806b) of the catheter adapter (102). Some embodiments of the flexible link element (800) may include a shape or contour that accommodates various external structures of the catheter adapter (102).

[0061] Now, referring to FIG. 9, some embodiments of the catheter assembly (100) may include a dressing (114) that is coupled to an inclination device (900) or other suitable structure that automatically adjusts the angle of the catheter adapter (102) relative to the dressing (114). In some embodiments, the dressing (114) may include a foam pad type dressing (114) having an indentation or other suitable stabilizing structure to stabilize the catheter adapter (102) within it. For example, some embodiments may include a dressing (114) such as a StatLock® IV stabilization device made for a Becton-Dickinson Nexiva™ catheter (112). In any case, the dressing (114) accommodates the catheter adapter (102) and can hold the catheter adapter (102) in a substantially stable position relative to the dressing (114).

[0062] In some embodiments, the inclination device (900) may be coupled to the proximal side or end (118) of the stabilization element (700). Some embodiments of the inclination device (900) may include one or more snap arms (906) pivoting from the attachment point (908). When operated, some embodiments of the inclination device (900) may pivot forward in a distal direction and also snap coupled in place so that the distal end (106) of the catheter adapter (102) pivots close to the insertion site of the catheter (112). Such a configuration can improve access to blood by moving the tip (120) of the catheter (112) forward within the blood vessel, while reducing the risk of the catheter (112) becoming entangled at the distal end (106) of the catheter adapter (102).

[0063] In another embodiment, the snap arm (906) may be pivoted proximally so that the snap arm (906) is snapped into place at the proximal side or proximal end of the dressing (114). This may pivot the catheter adapter (102) backward, raise the distal end (106) of the catheter adapter (102), and move the tip (120) of the catheter (112) proximally within the blood vessel. In yet another embodiment, the tilt device (900) may be rotated backward to clip into the proximal end (104) of the catheter adapter (102). In either case, in some embodiments, the tilt device (900) may reset the angle of the catheter adapter (102), thereby repositioning the tip (120) of the catheter (112) within the blood vessel.

[0064] Now, referring to FIGS. 10a and FIGS. 10b, in some embodiments, a catheter assembly (100) may include a dressing (114) that accommodates a catheter adapter (102) and a traction mechanism (1000) coupled to the dressing (114) to consistently apply traction to a catheter (112) extending from the catheter adapter (102). As illustrated in FIG. 10a, in some embodiments, the dressing (114) may include a stabilization pad (1008), and the stabilization pad (1008) may have an external shape that accommodates and stabilizes a stabilization element (700) coupled to the stabilization pad (1008) and / or the catheter adapter (102).

[0065] Some embodiments of the traction mechanism (1000) may be coupled to a stabilization pad (1008) at a position substantially corresponding to the position of the catheter (112). In some embodiments, the traction mechanism (1000) may include an anchor point (1006) located on both sides of the catheter (112) at or near the proximal end. In some embodiments, a traction arm (1002) may be provided extending distally from the anchor point (1006) and parallel to the catheter (112). In some embodiments, a traction plate (1004) extending substantially transversely to the traction arm (1002) may be coupled to or integrated 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).

[0066] When operated, in some embodiments, the traction arm (1002) may be gripped inwardly, thereby causing the shape of the traction arm (1002) to be extended or deformed inwardly relative to the catheter (112). In some embodiments, due to the application of such force, a controlled traction force may be applied to the catheter (112) to open a fluid path within the vascular system.

[0067] Now, referring to FIG. 11, in an alternative embodiment, the traction mechanism (1000) may include one or more traction arms (1002) configured to be pressed or displaced downward relative to the catheter (112). In some embodiments, such downwardly applied force may extend the traction mechanism (1000), thereby increasing the distance between the traction plate (1004) located adjacent to the tip (120) of the catheter (112) and the anchor point (1006) located adjacent to the proximal end of the catheter (112). In this way, the traction mechanism (1000) may be operated to consistently apply a traction force to the catheter (112).

[0068] Now, referring to FIGS. 12 and FIGS. 13, in some embodiments, a first section (116) of the dressing (114) may include an outer shape, adhesive, and / or other structure that holds the catheter adapter (102) in a substantially fixed position relative to the patient. A 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 by an adhesive or other suitable device or mechanism. According to such a configuration, in some embodiments, the first section (116) and the second section (118) may be separated by a substantially constant distance (122).

[0069] In some embodiments, the traction mechanism (1000) may be coupled to a first section (116) of the dressing (114) and configured to be attached to a second section (118) of the dressing (114) to adjust the distance. In some embodiments, the traction mechanism (1000) may include an adjustable snap structure (1200) to adjust the distance between the first section (116) and the second section (118). According to such a configuration, some embodiments of the snap structure (1200) can apply a consistent traction force to the catheter (112).

[0070] As illustrated in FIG. 12, in some embodiments, the traction mechanism (1000) may include a tension strap (1204) coupled to a first section (116) of the dressing (114). In some embodiments, the tension strap (1204) may be integrally formed to form a single unit with the first section (116) of the dressing (114). In some embodiments, a catheter adapter (102) and / or a stabilizing element (700) may be coupled to the tension strap (1204). In other embodiments, the tension strap (1204) may substantially surround the catheter adapter (102) and / or the stabilizing element (700).

[0071] In any case, some embodiments of the tension strap (1204) include a snap structure (1200) attached or integrated to its distal end. In some embodiments, the snap structure (1200) may include an extension or tab having one or more snap caps (1206) arranged along its length. In some embodiments, each snap cap (1206) may be configured to be attached to a socket (1202) attached or integrated to a second section (118) of the dressing (114). In some embodiments, the second section (118) may include a plurality of sockets (1202), in which case one or more snap caps (1206) may be adjustablely attached to one or more sockets (1202). According to this configuration, in some embodiments, the tension strap (1204) may be tightened and / or loosened with respect to the second section (118) of the dressing (114) in order to adjust the traction force applied to the catheter (112) in a controlled manner.

[0072] Now, referring to FIG. 13, in some embodiments, the tension strap (1204) or the dressing (114) may include an alternative structure (1300), such as a clasp, button, hook, loop fastener like Velcro, adhesive, or other suitable fastener or structure. As illustrated, in some embodiments, the connecting structure (1300) may include a first connecting element (1302) connected to a first section (116) of the dressing (114) and a second connecting element (1304) connected to a second section (118) of the dressing (114). In some embodiments, the first connecting element (1302) and / or the second connecting element (1304) may be adjusted so as 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, to reduce the distance (122) between the first section (116) and the second section (118), the first connecting element (1302) and the second connecting element (1304) may be mutually locked or otherwise combined with each other, thereby enabling the application of traction force to the catheter (112) in a consistent manner.

[0073] All examples and conditional phrases described herein are intended for educational purposes to help readers understand the invention and concept provided by the inventors, and should not be construed that the invention is limited to such specific examples and conditions. Although embodiments of the invention have been described in detail, it should be understood that various variations, substitutions, and modifications are possible without departing from the scope and spirit of the claims.

Claims

Claim 1 A catheter assembly for applying traction to a catheter, wherein the catheter assembly comprises: 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; and a dressing for applying traction to the catheter in response to the catheter being placed within a patient's vasculature, wherein the dressing comprises a first section adjustablely coupled to a second section, wherein the first section is configured to secure at least one of the catheter adapter and the catheter to the patient, and the second section is located distal to the first section. A catheter assembly comprising: an adjustment element coupled to the first and second sections, wherein the adjustment element is configured to adjustably fix the relative distance between the first and second sections in order to apply a traction force to the catheter in the vascular system. Claim 2 In claim 1, the first section and the second section are independent of each other, forming a catheter assembly. Claim 3 A catheter assembly according to claim 1, wherein the first section comprises an aperture that accommodates at least a portion of at least one of the catheter adapter and the catheter. Claim 4 A catheter assembly according to claim 1, wherein the first section comprises an adhesive for fixing at least one of the catheter adapter and the catheter to the patient. Claim 5 A catheter assembly according to claim 1, wherein the second section is further configured to be fixed to the patient. Claim 6 delete Claim 7 A catheter assembly according to claim 1, wherein the adjustment element is releaseable to separate the first section and the second section from each other. Claim 8 A catheter assembly according to claim 1, wherein the adjusting element comprises at least one tether having a first end coupled to a first section and a second end coupled to a second section, each of the at least one tether configured to be selectively tightened to apply traction to the catheter. Claim 9 A catheter assembly according to claim 1, wherein the adjusting 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, and the second section is configured to be manually adjusted relative to the first section to apply traction to the catheter. Claim 10 A catheter assembly according to claim 1, wherein the adjusting element comprises at least one arm extending between a first section and a second section, and the distance between the first section and the second section is adjusted to provide traction to the catheter by manipulating the position of the at least one arm. Claim 11 A catheter assembly according to claim 10, further comprising a lock element that fixes the distance between a first section and a second section to maintain traction in the catheter. Claim 12 In paragraph 11, the above locking element is a catheter assembly that mechanically engages with at least a portion of at least one arm to maintain traction in the catheter. Claim 13 A catheter assembly according to claim 10, wherein the at least one arm comprises at least one joint, and a traction force is applied to the catheter when the arm is pressed inward toward the longitudinal axis. Claim 14 A catheter assembly according to claim 10, wherein at least one arm comprises a transition portion movably coupled to an extension portion, and the distance between the first section and the second section for applying traction to the catheter is shortened by moving the transition portion away from the first section in a direction parallel to the longitudinal axis. Claim 15 A catheter assembly according to claim 10, wherein the adjustment element comprises a dial feature coupled to at least one arm, and the distance between a first section and a second section that applies traction to the catheter is adjusted by rotating the dial feature. Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 delete Claim 20 delete

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