Catheter cutting tool

Abstract

The present disclosure relates to a catheter cutting tool (10) configured to provide accurate and safe trimming of catheter tubing. The tool (10) comprises a lower housing (14) having a front wall (18) and back wall (20) spaced to define a gap (22), each wall including a catheter-receiving aperture (24) for coaxial support of tubing. An upper housing (12) is mounted for guided vertical movement relative to the lower housing (14) and carries a cutting blade (16) that passes through the gap (22) to sever the tubing. A retention assembly comprising lugs (26, 26a, 26b) and sliders (34) with locking profiles (38) selectively holds the upper housing (12) in an open position before use and / or in a closed, locked position after use. In one embodiment, engagement with a second pair of lugs (26b) produces an irreversible lock for single-use. In another embodiment, only a first pair of lugs (26a) is provided, enabling reset for multiple uses. Optional features include a handle (28), guide rails, and interchangeable aperture inserts.

Description

[0001] Title: CATHETER CUTTING TOOL

[0002] FIELD

[0003] The present disclosure relates generally cutting tools for precision applications in medical procedures. More particularly, the present disclosure pertains to a catheter cutting tool configured to enable accurate, consistent and efficient cutting of catheter tubing.

[0004] BACKGROUND

[0005] Catheters serve a wide array of critical functions in medical practice, making them indispensable tools in patient care. One of their primary uses is for infusing medications or nutrients directly into a patient's bloodstream, allowing for rapid therapeutic effects and precise dosing. This is particularly important in situations where oral administration is not feasible, such as in patients who are unconscious or unable to swallow. Additionally, catheters are employed to withdraw bodily fluids, such as blood or urine, for diagnostic testing or to relieve conditions like urinary retention. Furthermore, catheters are utilized to deliver various medical devices, such as stents or balloons, directly to a targeted treatment site within the body, facilitating minimally invasive procedures that can reduce recovery time and improve outcomes. Beyond these functions, catheters can also be used for drainage purposes, such as removing excess fluid from around organs or in cases of infection. Thus, in a medical setting, the catheters play an essential role in delivering treatments, monitoring health, and performing interventions in healthcare systems.

[0006] As such, many catheters are intended for immediate use by medical practitioners in their original manufactured state, without the need for modifications. However, certain catheters often require customization by the healthcare provider to meet the specific needs of the patient or the intended procedure. For example, peripherally inserted central catheters (PICCs) are commonly utilized in medical settings for long-term intravenous access. PICCs are long, thin catheters that are inserted into a vein in the arm and threaded through the body until the distal end reaches a large vein near the heart. Due to anatomical variations between patients, the length of the PICC required can differ significantly. To ensure the distal end is positioned optimally, a healthcare provider often need to cut the PICC to a precise length before insertion and optimal placement within a patient's body. This process typically involves trimming the distal end of the catheter with a scalpel, a razor or scissors to ensure that it can be positioned accurately at a specific anatomical location. While this method allows for customization, it frequently results in a blunt end that may harbor sharp edges, posing a risk of scraping and traumatizing the delicate internal tissues during insertion. Additionally, when a healthcare provider attempts to create a more atraumatic end manually, the resulting cuts can be non-uniform and uneven, as achieving a straight, clean cut can be challenging without specialized tools. The quality of the cut made with a scalpel can vary significantly between different users. A straight, clean cut is essential for ensuring that the catheter fits snugly within the vessel. An uneven or angled cut can cause turbulence in blood flow, increasing the risk of thrombosis or other vascular injuries. Such irregularities not only compromise the smoothness of the catheter's tip but can also leave a rough end surface. This roughness can increase the likelihood of complications, such as the accumulation of blood clots or bacterial growth, both of which can lead to serious infections or other adverse events. If the catheter is not cut correctly, it can lead to vessel trauma, which may result in serious complications such as bleeding, infection, or catheter malposition. These complications can necessitate further medical intervention, increasing the overall risk to the patient. The ability to customize the PICC length is crucial for maximizing the effectiveness of the catheter and minimizing complications, as an improperly positioned distal end could lead to issues such as irritation of the vein wall or poor drug delivery. Therefore, while trimming catheters is often necessary, it is crucial for healthcare providers to use appropriate techniques and tools to minimize potential risks associated with catheter cutting and insertion.

[0007] Accordingly, there is a need for a specialized catheter cutting device that can simplify and improve the catheter end cutting process for end-users. Such a device should allow the catheter to be trimmed ensuring a clean and uniform straight cut that is less likely to scrape or traumatize internal tissues during insertion. Additionally, the device should securely hold the catheter in the proper position during the cutting operation, ensuring a clean, uniform cut and preventing the catheter from slipping or moving unexpectedly. By providing a simple, effective, and safe solution for trimming catheter tips, healthcare providers can minimize the risks associated with this necessary procedure and ultimately improve the safety and efficacy of catheter-based interventions across various medical specialties which further helps healthcare professionals in enhancing the patient safety and improve the overall quality of care. SUMMARY AND OBJECTS

[0008] Certain exemplary aspects of the present disclosure are set forth below to provide the reader with a brief overview of example forms the invention may take. These aspects are presented for illustrative purposes only and are not intended to limit the scope of the disclosure. The invention may encompass additional aspects, embodiments, and variations not expressly described herein. References to particular embodiments, examples, or variations are intended to exemplify devices, systems, and methods within the scope of the disclosure. Combinations of features from different embodiments or variations, whether expressly described or implicit, are also contemplated as being within the scope of the present disclosure.

[0009] The present disclosure relates to a catheter cutting tool configured to facilitate accurate, safe, and repeatable trimming of catheter tubing to a desired length in clinical settings. The tool generally comprises a lower housing having a front wall and a back wall spaced apart to define a gap, each wall being formed with one or more catheter-receiving apertures. The apertures are coaxially aligned to support catheter tubing at two spaced-apart points, maintaining axial alignment throughout the cutting operation and accommodating a range of French sizes.

[0010] An upper housing is mounted for guided vertical movement relative to the lower housing and carries a cutting blade oriented to pass through the gap to sever catheter tubing positioned in the apertures. Relative movement of the housings is controlled by an engagement between lugs on the lower housing and sliders on the upper housing. The sliders are provided with locking profiles that interact with the lugs to selectively retain the upper housing in a pre-use open position, in a post-use closed position, or both, depending on the embodiment.

[0011] In a single-use embodiment, the lower housing includes a first pair of lugs and a second pair of lugs. After cutting, continued downward travel of the upper housing causes the locking profiles on the sliders to move below and engage the second lugs, establishing an irreversible lock that prevents reopening and ensures the cutting blade remains enclosed for safe disposal. This design promotes compliance with infection-control protocols, eliminates the potential for reuse, and reduces sharps-related risks. In a multiple-use embodiment, the lower housing is provided with only the first pair of lugs and does not incorporate the second pair or a post-use locking arrangement. After each cut, the upper housing can be returned to the open position by pulling it upward, allowing the tool to be reset and reused. This configuration is particularly suited to high-volume clinical environments where repeated catheter preparation is required. Materials and construction may be selected to withstand cleaning and sterilization cycles without performance degradation.

[0012] Further features that may be incorporated into either embodiment include tapered or chamfered lug profiles to reduce actuation force, interchangeable aperture inserts to adapt to different catheter sizes, guide rails or bushings to ensure precise blade alignment, and handle features positioned at the top of the upper housing to improve ergonomics. The device may also incorporate non-slip bases, tamper-evident elements, tactile or audible feedback mechanisms, or transparent housing portions for visual alignment. Through these configurations, the catheter cutting tool provides a safe, reliable, and efficient cutting mechanism that maintains catheter alignment, produces clean and consistent cuts, and can be adapted for either single-use sterile disposal or controlled multiple-use operation according to clinical needs.

[0013] In some examples, the catheter cutting tools incorporate one or more lugs and one or more slider(s) which ensure that the cutting tool remains in an open state prior to use, allowing for immediate readiness when the catheter needs to be cut. Such features eliminate the need for the medical practitioner to manually open the cutter before each use, streamlining the workflow and reducing the time spent preparing for catheter insertion for cutting purpose. In some situations, even after the tool is opened, it may inadvertently shift downward, partially or completely obstructing the hole intended for catheter insertion. This can occur due to various factors, such as the angle of insertion or the presence of other instruments in the medical setting. The lugs are designed to minimize this movement of the sliders, ensuring that the cutting hole remains unobstructed, and that the catheter can be inserted smoothly therethrough. By keeping the tool in an open position, healthcare providers can focus on the insertion process without the distraction of managing the cutter's position. This can be especially beneficial in high-pressure environments where efficiency and precision are paramount. In some examples, the lugs are designed so that the force required to close the tool is less than that needed to reopen it after a cut has been made. This means that once the catheter tubing is cut, the tool can be easily closed without requiring excessive force. Such a mechanism not only enhances usability but also supports the catheter cutting tool being a single-use product. By ensuring that the tool is designed for one-time use, it reduces the risk of cross-contamination and infection that can occur with reusable instruments. The inability to easily reopen the cutter after closure discourages reuse, promoting better hygiene practices in medical settings.

[0014] It is an object of the present invention to provide a catheter cutting tool that enables accurate, clean, and repeatable cutting of catheter tubing while maintaining precise axial alignment of the tubing during the cutting operation.

[0015] It is a further object of the invention to provide a catheter cutting tool incorporating a retention mechanism configured to selectively maintain the upper housing in a pre-use open position and / or a post-use closed position according to the intended mode of use.

[0016] It is an additional object of the invention to provide a single-use embodiment in which, after completion of the cutting action, the upper housing is irreversibly locked in the closed position to prevent reuse, facilitate safe disposal, and promote adherence to infection-control protocols.

[0017] It is yet another object of the invention to provide a multiple-use embodiment in which the upper housing can be repeatedly returned to the open position after each cutting operation, allowing the tool to be reset for subsequent use.

[0018] It is also an object of the invention to offer catheter cutting tools in which the components are formed from materials suitable for the intended lifecycle of the device, including single-use sterile materials and, in reusable versions, materials capable of withstanding cleaning and sterilization cycles without degrading performance.

[0019] It is an object of the invention to enhance the operational ergonomics of the tool through features such as an integrated or attached handle, reduced actuation force via tapered or chamfered lugs, and grip-enhancing surfaces. It is an object of the invention to provide optional safety and usability enhancements including tamper-evident or frangible locking features, tactile or audible lock engagement feedback, non-slip bases, interchangeable catheter-aperture inserts, and transparent portions for visual alignment.

[0020] It is still another object of the invention to provide a catheter cutting solution that can be configured for either high-volume multiple-use environments or single-use sterile applications, thereby maximizing utility, safety, and cost-effectiveness in differing clinical scenarios.

[0021] BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

[0022] The above and other objects, examples, features and advantages of the present disclosure will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which like reference numerals refer to like parts throughout, and wherein:

[0023] Figs. 1A, 1 B, 1 C, 1 D, 1 E, 1 F & 1 G illustrate a front, back, left side, right side, top side, bottom side and perspective view respectively of a catheter cutting tool according to some examples of the present disclosure;

[0024] Fig. 2 illustrates an exploded view of the catheter cutting tool of Fig. 1A;

[0025] Fig. 3 illustrates a cross-sectional side view of the catheter cutting tool of Fig. 1A;

[0026] Fig. 4 illustrates another exploded view of the catheter cutting tool of Fig. 1A;

[0027] Fig. 5 illustrates the locked position of the catheter cutting tool;

[0028] Figs. 6A, 6B, 6C, 6D, 6E, 6F & 6G illustrate a front, back, left side, right side, top side, bottom side and perspective view respectively of a catheter cutting tool according to some examples of the present disclosure;

[0029] Fig. 7 illustrates an exploded view of the catheter cutting tool of Fig. 6A. DETAILED DESCRIPTION

[0030] Those skilled in the art will appreciate that the disclosed aspects and features of the present disclosure are not limited to any particular embodiment of catheter cutting tool for cutting a catheter tubing. It will be readily understood that the parts / components of the present disclosure, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

[0031] Figs. 1A to 1G illustrate an example of a catheter cutter tool 10 configured for single-use and adapted to facilitate accurate and efficient cutting of catheter tubing (not shown). The tool 10 is constructed to provide consistent, clean, and substantially straight cuts across a range of catheter sizes, thereby reducing the likelihood of complications such as vessel trauma, catheter malposition, or other insertion-related issues. The catheter cutting tool 10 is intended for use by healthcare professionals in various medical or clinical environments, including hospitals, outpatient centers, and surgical facilities. By enhancing the safety and effectiveness of catheter preparation procedures, the tool 10 enhances the safety and quality of catheter preparation, thereby contributing to improved patient care and operational efficiency in medical setting.

[0032] As shown in Figs. 1A to 1 G and more particularly in Figs. 3 and 4, the catheter cutting tool 10 comprises an upper housing 12 and a lower housing 14, each incorporating structural and functional features that together enable safe, accurate, and efficient cutting of catheter tubing. The upper housing 12 includes a sharp cutting blade 16 that forms the primary cutting element of the tool 10. The blade 16 is securely mounted within the upper housing 12 in a predetermined orientation to ensure optimal engagement with the catheter tubing during the cutting operation, thereby producing a substantially straight and clean cut. In one embodiment, the cutting blade 16 is fabricated from a durable, medical-grade material, such as medical-grade stainless steel, selected for its corrosion resistance, biocompatibility, and ability to retain sharpness over multiple cutting operations. In alternative embodiments, the cutting blade 16 may be fabricated from other biocompatible metals, such as titanium or titanium alloys, which offer high strength-to-weight ratio and superior corrosion resistance; from hardened surgical-grade alloys, such as cobalt-chromium alloys, known for maintaining an ultra-sharp edge; or from engineered ceramics, zirconia, or alumina, which provide extreme hardness, chemical inertness, and the ability to achieve a fine cutting edge. In further embodiments, the blade 16 may be disposable or replaceable, supported on a mount within the upper housing 12 that allows for quick substitution without risk of injury to the operator. The blade edge may be straight, curved, angled, serrated, or micro-serrated, depending on the intended application and the type of catheter tubing to be cut. The upper housing may further comprise at least one internal guide channel configured to direct the cutting blade 16 along a predetermined vertical path. The housings 12, 14 are moulded from a medical-grade thermoplastic selected from the group consisting of polycarbonate (PC), polypropylene (PP).

[0033] The configuration of the upper housing 12 also serves to enclose and shield the blade 16 when the tool is not in operation, thereby reducing the risk of accidental contact and injury to healthcare personnel. By integrating blade positioning, housing design, and safety shielding within a single component, the upper housing 12 enhances both the functional performance and operational safety of the catheter cutting tool 10.

[0034] As illustrated in Figs. 2 and 4, the cutting blade 16 includes at least two mounting apertures 30 configured to facilitate secure attachment of the cutting blade 16 to the upper housing 12. The upper housing 12 is provided with at least two corresponding engagement projections 32, dimensioned and positioned to align with the mounting apertures 30 of the blade 16. During assembly, the apertures 30 of the cutting blade 16 are positioned over the projections 32 of the upper housing 12, thereby establishing precise blade alignment relative to the catheter-cutting interface. Once aligned, the blade 16 is affixed to the upper housing 12 using an adhesive, bonding agent, or other suitable securing technique, such as ultrasonic welding, mechanical crimping, or fasteners, depending on the embodiment.

[0035] Such attachment arrangement provides a stable, non-movable connection between the cutting blade 16 and the upper housing 12, ensuring the blade maintains its predetermined orientation under operational forces encountered during catheter cutting. By preventing blade displacement or loosening, the arrangement preserves cutting accuracy, maintains consistent tip geometry, and reduces the risk of incomplete cuts or user injury. In some embodiments, the projections 32 may include features such as undercuts, barbs, or textured surfaces to enhance mechanical interlock with the apertures 30, further improving retention strength without compromising assembly simplicity.

[0036] As illustrated in Figs. 2 and 4, the projections 32 formed on the upper housing 12 are dimensioned with predetermined length, width, and height parameters selected to achieve a desired interaction with the front wall 18 of the lower housing 14. In certain embodiments, these dimensions are configured to provide a controlled interference and / or clearance relationship with the front wall 18 so as to guide and stabilize the cutting blade 16 during operation. The interference fit portion of this arrangement serves to securely retain the cutting blade 16 in a fixed lateral position, thereby minimizing any undesired side-to-side movement during the cutting procedure. At the same time, the clearance portions are sized to permit the limited, intended range of motion necessary for the blade to perform an efficient and accurate cutting action.

[0037] By combining these dimensional features, the projections 32 establish a stable support base against the front wall 18, maintaining the cutting blade 16 in a precisely oriented position throughout the cutting stroke. Such stability prevents blade tilting or wobbling, conditions which could otherwise impair cut quality, deform the catheter tubing, or compromise procedural safety. In some embodiments, the projections 32 may incorporate chamfered edges, tapered surfaces, or low-friction coatings to further facilitate smooth interaction with the front wall 18, reduce wear, and enhance operational life. In alternative embodiments, the projections 32 and / or the opposing contact region on the front wall 18 may be formed from resilient or elastomeric materials to absorb operational vibrations while maintaining positional stability of the cutting blade 16. Such configuration of the projections 32 therefore ensures that the cutting blade 16 remains steady and aligned throughout use, enabling consistent, precise cuts and reducing the likelihood of catheter damage or procedural error.

[0038] As illustrated in Figs. 2 and 4, the cutting blade 16 is provided with at least two mounting apertures 30 positioned at predetermined distances from one another to define a gap between adjacent apertures. In certain embodiments, the location and spacing of the apertures 30 are selected to optimize both the structural integrity and the operational performance of the cutting blade 16. The distribution of these apertures 30 across the blade body allows cutting forces to be transferred more evenly, thereby reducing localized stress concentrations that might otherwise contribute to material fatigue, deformation, or premature failure. The defined gap between the apertures 30 further facilitates accurate positional alignment of the cutting blade 16 with the corresponding engagement projections 32 formed on the upper housing 12. Such alignment ensures that, once assembled, the blade 16 remains in a precise operative position relative to the catheter-cutting interface, thereby enhancing assembly stability and maintaining consistent cutting geometry. In various embodiments, the inter-aperture distance and configuration may be tailored to factors such as the intended application of the tool, the blade material properties, and the desired cutting characteristics. For example, shorter spacing may increase blade rigidity, whereas increased spacing may reduce weight or improve balance. The apertures 30 may be circular, elongated, or of another profile configured to cooperate with the projections 32 for either an interference fit, clearance fit, or a combination thereof.

[0039] It is to be understood that although the embodiment shown in Figs. 2 and 4 illustrates two mounting apertures 30 on the cutting blade 16 cooperating with two corresponding engagement projections 32 on the upper housing 12, the number of apertures 30 and projections 32 is not limited to this arrangement. In certain embodiments, additional or fewer attachment points may be provided, with their number, shape, and placement selected according to the specific design requirements of the cutting blade 16 and the upper housing 12. Providing multiple attachment points can facilitate more uniform distribution of operational loads along the length of the blade 16, thereby reducing localized stress concentrations and improving structural durability. The number and spacing of the apertures 30 and projections 32 may be optimized based on factors including, but not limited to, the size and geometry of the cutting blade 16, the dimensions and contour of the upper housing 12, the anticipated cutting forces, and the manufacturing or assembly methods utilized.

[0040] In some embodiments, the projections 32 and apertures 30 may have complementary circular, oval, polygonal, or keyed profiles to improve anti-rotation stability. In further embodiments, the attachment interface may be augmented by adhesives, ultrasonic welding, mechanical fasteners, or snap-fit features in addition to the projection / aperture engagement, thereby ensuring a robust and reliable connection. Regardless of the specific configuration, the attachment arrangement is configured to maintain precise alignment of the cutting blade 16 with the catheter-cutting path, resist displacement under repeated use, and thereby ensure safe, consistent, and effective operation of the catheter cutting tool 10.

[0041] As illustrated in Figs. 2 and 4, the catheter cutting tool 10 further comprises a lower housing 14 that serves as a structural base and support platform for the cutting mechanism. The lower housing 14 includes a front wall 18 and an opposite back wall 20, the two walls being spaced apart to define a gap 22 therebetween. Said gap 22 is dimensioned to receive and guide a portion of the catheter tubing during the cutting operation, as described in greater detail in subsequent sections of this disclosure.

[0042] In the depicted embodiment, each of the front wall 18 and back wall 20 is formed with one or more catheter-receiving apertures 24. These apertures 24 are precisely dimensioned to correspond to predetermined catheter outer diameters expressed in French (Fr) sizes. Suitable sizes may include, but are not limited to, 2 Fr, 3 Fr, 4 Fr, 5 Fr, 6 Fr, and 8 Fr. The exact dimensions of each aperture 24 are selected to provide a snug, supportive fit for the intended catheter size. Such controlled fit securely positions the catheter tubing in axial alignment with the cutting blade 16, thereby minimizing movement, bending, or slippage during cutting and reducing the likelihood of improper, angled, or incomplete cuts. The catheter-receiving aperture(s) 24 are dimensioned with a tolerance, not being limited to, between 0.01 mm and 0.5 mm greater than the outer diameter of the corresponding catheter size.

[0043] As illustrated in Figs. 2 and 4, the catheter cutting tool 10 further comprises a lower housing 14 that serves as a structural base and support platform for the cutting mechanism. The lower housing 14 includes a front wall 18 and an opposite back wall 20, the two walls being spaced apart to define a gap 22 therebetween. The gap 22 is dimensioned to receive and guide a portion of the catheter tubing during the cutting operation, as described in greater detail in subsequent sections of this disclosure.

[0044] In the depicted embodiment, each of the front wall 18 and back wall 20 is formed with one or more catheter-receiving apertures 24. These apertures 24 are precisely dimensioned to correspond to predetermined catheter outer diameters expressed in French (Fr) sizes. Suitable sizes may include, but are not limited to, 2 Fr, 3 Fr, 4 Fr, 5 Fr, 6 Fr, and 8 Fr. The exact dimensions of each aperture 24 are selected to provide a snug, supportive fit for the intended catheter size. Such controlled fit securely positions the catheter tubing in axial alignment with the cutting blade 16, thereby minimizing movement, bending, or slippage during cutting and reducing the likelihood of improper, angled, or incomplete cuts. In some embodiments, the upper housing 12 is transparent or translucent in at least a portion adjacent the blade 16 to permit visual alignment of the catheter tubing before cutting. The provision of apertures 24 for multiple French sizes on both the front wall 18 and back wall 20 enables the catheter cutting tool 10 to accommodate a broad spectrum of catheter tubing types encountered in clinical practice. In some embodiments, the apertures 24 on the front and back walls 18, 20 are coaxially aligned so that the tubing is supported along two spaced contact points, further enhancing straightness and positional stability during cutting. In alternative embodiments, the holes may be tapered, chamfered, or lined with a low-friction or elastomeric material to ease catheter insertion while protecting the outer surface of the tubing from damage.

[0045] In further embodiments, the apertures 24 may be formed as part of interchangeable inserts or removable plates mounted to the front and back walls, thereby allowing the device to be quickly adapted for different catheter size ranges or replaced if worn. In further embodiments, the aperture size or profile may be defined by interchangeable inserts or bushings, enabling the same lower housing 14 to be adapted to different catheter ranges or replaced if worn. The number, arrangement, and shape of the apertures 24 may be varied depending on intended application, expected catheter dimensions, and manufacturing considerations. Regardless of the particular configuration, the arrangement of the front wall 18, back wall 20, gap 22, and apertures 24 is configured to ensure proper catheter seating, precise axial alignment with the cutting mechanism, and safe, repeatable cutting performance across multiple catheter sizes.

[0046] During use, when a catheter tubing is to be prepared for cutting using the catheter cutting tool 10 of the present disclosure, a healthcare professional selects a catheter-receiving aperture 24 provided in the front wall 18 of the lower housing 14 that corresponds to the French size of the catheter tubing to be cut. Each aperture 24 is dimensioned in accordance with predetermined outer diameter specifications for standard catheter sizes, such as 2 Fr, 3 Fr, 4 Fr, 5 Fr, 6 Fr, or 8 Fr, so as to provide a tailored receiving interface for the selected catheter.

[0047] Once the appropriate aperture 24 is selected, the catheter tubing is inserted through the front wall 18 and guided axially through the corresponding, coaxially aligned aperture 24 formed in the back wall 20 of the lower housing 14. In this arrangement, the front wall 18 provides initial alignment and stabilization at the point of entry, while the back wall 20 delivers secondary guidance and support as the tubing passes through the cutting zone. Because the catheter is supported at two longitudinally spaced locations, the tubing is maintained in a substantially straight orientation and is restrained against bending or lateral deflection during the cutting operation.

[0048] The precise dimensioning of the apertures 24 is configured to achieve a controlled fit with the catheter tubing tight enough to prevent unwanted movement or slippage during cutting, yet not so restrictive as to damage the catheter surface or impede insertion and removal. By engaging and supporting the catheter tubing at both the front wall 18 and back wall 20, such a dual-wall arrangement creates a stable, well-aligned cutting path for the cutting blade 16. Such stability enhances cutting precision, resulting in a clean, uniform, and perpendicular cut surface that reduces the likelihood of uneven edges, deformation, or tissue-trauma risk upon catheter insertion into the patient.

[0049] As illustrated in Fig. 3, the gap 22 defined between the front wall 18 and the back wall 20 of the lower housing 14 is dimensioned and configured to receive a portion of the upper housing 12 of the catheter cutting tool 10. The upper housing 12 operatively supports the cutting blade 16, which is mounted within the housing in a predetermined orientation to ensure precise alignment with the catheter-receiving apertures 24 of the front and back walls 18, 20. This alignment is maintained during the cutting operation to deliver a clean and uniform cut.

[0050] In the depicted embodiment, the upper housing 12 is mounted for reciprocating vertical movement relative to the stationary lower housing 14. Upon activation, the upper housing 12 travels downward in a controlled manner, causing the cutting blade 16 to descend through the gap 22 and move into the cutting zone between the front and back walls. As the blade 16 passes through this gap, it engages and severs the catheter tubing extending beyond the back wall 20. The path of travel is predetermined and guided so that the blade edge remains in accurate register with the catheter’s longitudinal axis, preventing deviation or angular misalignment.

[0051] The interaction of the gap 22 with the guided vertical motion of the upper housing 12 ensures that the cutting operation is smooth, stable, and predictable. The dimensions of the gap 22 are selected to provide adequate clearance for the cutting blade 16 while simultaneously restricting any undesirable lateral movement, thereby maintaining blade position relative to the catheter tubing during the cutting stroke. By controlling blade path and maintaining catheter stability, such arrangement produces a cut that is substantially perpendicular to the catheter’s longitudinal axis, minimizing burrs, fraying, or irregularities that could adversely affect catheter performance.

[0052] In some embodiments, the vertical movement of the upper housing 12 may be biased or assisted by a spring or lever mechanism to enhance cutting efficiency and reduce operator effort. In further embodiments, guide rails, bushings, or low-friction interfaces may be provided between the upper housing 12 and lower housing 14 to ensure smooth linear travel and minimize wear over repeated use. Regardless of the actuation method, the design of the gap 22 in combination with the guided motion of the upper housing 12 contributes to accurate and efficient catheter trimming, thereby reducing the risk of procedural complications and improving overall user safety.

[0053] Referring to Figs. 2 and 4, the catheter cutting tool 10 includes one or more lugs 26 and one or more sliders 34 configured and positioned to perform two primary functions i.e. to maintain the upper housing 12 in an open position relative to the lower housing 14 prior to use, and to securely lock the upper housing 12 to the lower housing 14 after the catheter-cutting procedure has been completed. In the depicted embodiment, the front wall 18 and back wall 20 of the lower housing 14 each carry at least two pairs of lugs 26 located on opposite lateral sides of the housing. For clarity, these are identified as a first pair of lugs 26a and a second pair of lugs 26b. Each lug 26 defines an inner side wall 36a and an outer side wall 36b. The inner side wall 36a is formed with a tapered profile configured to facilitate guided engagement with the corresponding slider 34 during movement of the upper housing 12.

[0054] The upper housing 12 is provided with at least two sliders 34, each disposed on opposing lateral sides of the housing so as to correspond with the lug arrangement of the lower housing 14. The pairs of lugs 26 on each side are positioned in opposed relation, defining a clearance path therebetween sized to receive and permit travel of the associated slider 34. Such arrangement allows each slider 34 to translate upwardly and downwardly along the defined path while being laterally retained by the facing lugs 26.

[0055] At the proximal end of each slider 34 is an integral locking profile 38. When the cutting procedure is complete and the upper housing 12 is fully depressed toward the lower housing 14, the locking profile 38 engages beneath a corresponding lug 26, thereby mechanically locking the upper housing 12 in a closed position. Such engagement prevents subsequent access to the cutting blade 16 and protects the user from accidental contact post-use. Conversely, when the device is new and in the open position, the locking profile 38 is arranged to abut against the first pair of lugs 26a, thereby acting as a stopper that supports and holds the upper housing 12 in a raised position. Such “pre-use” latch makes catheter insertion and alignment easier by keeping the cutting zone accessible.

[0056] In some embodiments, the locking profile 38 and / or the lugs 26 may incorporate chamfers, bevels, or curved lead-in surfaces to reduce insertion force during engagement. In other embodiments, the sliders 34 may be biased by springs or formed of elastically deflectable material to enable snap-fit engagement and disengagement with the lugs 26. The number, shape, and positioning of the lugs 26 and sliders 34 may be varied to suit different tool sizes, housing materials, or manufacturing processes. Regardless of the specific geometry, the cooperative arrangement of the lugs 26, sliders 34, and locking profiles 38 is configured to provide repeatable, secure retention of the housings in both their open and closed states, thereby enhancing safety, ease of use, and device reliability.

[0057] As illustrated in Figs. 2 and 4, during assembly of the catheter cutting tool 10, the upper housing 12 is positioned and urged downward so as to pass over, or “snap” past, the lugs 26 formed on the lower housing 14. The geometry of the lugs 26 is configured to allow this over-travel during assembly while thereafter establishing a mechanical interlock that resists separation of the housings during use. Once engaged, the lug profile cooperates with corresponding surfaces on the upper housing 12 to retain the housings in assembled condition, even under operational forces encountered during catheter cutting.

[0058] Such mechanical interlock arrangement prevents both inadvertent and intentional disengagement during clinical procedures, thereby helping maintain device integrity in the hands of medical personnel. The profile of the lugs 26 is further configured to hold the upper housing 12 in its intended positional relationship with the lower housing 14 throughout the cutting operation, ensuring consistent blade alignment and safe operation under varying user-applied pressures or movements. Regardless of the specific configuration, the cooperative engagement between the lugs 26 and the upper housing 12 is configured to maintain assembly integrity, operational stability, and user safety throughout the lifecycle of the tool. As illustrated in Figs. 1 C and 1 D, the lugs 26 are configured to cooperate with the sliders 34 and their associated locking profiles 38 to mechanically retain the upper housing 12 of the catheter cutting tool 10 in an elevated, open position prior to use. In this position, the cutting zone and catheter-receiving apertures 24 are fully accessible, allowing immediate catheter insertion and alignment without the need for the operator to manually hold or open the housing. When the upper housing 12 is drawn upward into its ready position, each slider 34 moves correspondingly in the upward direction, positioning its locking profile 38 between the first pair of lugs 26a and the second pair of lugs 26b on the lower housing 14. Such interposed relationship provides a positive stop that supports the upper housing 12 in the open state until deliberate actuation is applied.

[0059] By holding the cutting tool 10 in a constant ready-for-use condition, this arrangement minimizes preparation time, reduces handling steps, and decreases the likelihood of user error associated with manually separating the housings before every operation. The pre-use retention mechanism also ensures that the upper housing 12 maintains stable alignment relative to the lower housing 14 prior to cutting, further promoting accuracy and safety during catheter processing.

[0060] As illustrated in Fig. 5, the lugs 26 and sliders 34 of the catheter cutting tool 10 incorporate an integral locking feature configured to secure the upper housing 12 to the lower housing 14 after completion of a catheter-cutting operation. Following the cutting procedure, continued downward displacement of the upper housing 12 whether by manual pressure, spring bias, or other means drives each slider 34 and its corresponding locking profile 38 downward along the tapered inner side walls 36a of the first 26a and second 26b pairs of lugs. The tapered geometry of the inner side walls 36a guides the locking profiles 38 smoothly past the contact edges of the lugs 26 without binding, facilitating reliable transition into the locked state. As the upper housing 12 reaches its terminal downward position, each locking profile 38 moves beyond the second pair of lugs 26b. In this position, upward motion of the sliders 34 is mechanically obstructed by the engagement surfaces of the second pair of lugs 26b, thereby establishing a positive lock between the upper housing 12 and the lower housing 14. Such engagement prevents separation of the housings during handling, storage, or disposal.

[0061] The locking mechanism thus ensures that after use, the cutting blade 16 remains enclosed within the housings, preventing accidental contact and reducing sharps-related risks. In some embodiments, the lugs 26 and / or locking profiles 38 may include chamfered or radiused edges to reduce the locking force required, or may be formed from resilient materials to permit controlled elastic deflection during engagement. In other embodiments, audible or tactile feedback may be provided when the lock is engaged, confirming to the user that the device is secured. The post-use locking arrangement is configured to maintain the cutting tool 10 in a closed and tamper-resistant state, thereby enhancing safety during handling, transport, and disposal, and ensuring that the device cannot be inadvertently re-opened or reused. The tool 10 may comprise tamper-evident or frangible features configured to indicate any attempt to reopen the tool (10) after use.

[0062] In operation, once the upper housing 12 is fully depressed and the cutting blade 16 has severed the catheter tubing, the locking mechanism formed by the interaction of the lugs 26, sliders 34, and locking profiles 38 transitions into an engaged position in which the upper housing 12 is mechanically secured to the lower housing 14. In this locked state, the housings cannot be separated without destruction or permanent damage to the device, thereby rendering the catheter cutting tool 10 irreversibly closed. Such arrangement ensures that the tool 10 is suitable exclusively for single-use applications, eliminating the possibility of reuse. By preventing reopening after a cutting operation, the locking mechanism supports strict adherence to infection-control protocols and reduces the risk of cross-contamination between patients. The inability to access the blade 16 post-use also protects healthcare personnel from sharps injury during handling, transport, or disposal. The single-use, self-locking design not only enhances patient and operator safety but also simplifies clinical workflow by removing the need for cleaning or sterilization procedures associated with reusable instruments, thereby saving time and resources in busy medical environments.

[0063] As depicted in Figs. 6A to 6G and Fig. 7, an alternative embodiment of the catheter cutting tool 10 is shown, configured to facilitate accurate and efficient cutting of catheter tubing (not shown) while being suitable for multiple-use applications. This embodiment incorporates the principal structural components of the earlier example illustrated in Figs. 1A-1 G, including the upper housing 12, lower housing 14, and cutting blade 16.

[0064] In contrast to the first embodiment, the present version includes only a first pair of lugs 26a, positioned as shown in Figs. 6C, 6G, and 7, and omits the second pair of lugs 26b and the associated post-use locking arrangement. The lugs 26a in the depicted embodiment are formed without any tapered inner profile; however, in some embodiments, the lugs 26a may incorporate a tapered or chamfered profile similar to that described in the first embodiment to facilitate guided interaction with sliding components or to assist in controlled housing movement. With the reduced lug arrangement, the cutting blade 16 remains securely mounted within the upper housing 12 and is guided to move downward, through the cutting zone, to sever the catheter tubing in a controlled manner. However, the absence of the second pair of lugs 26b and a locking mechanism allows the upper housing 12 to be readily returned to its open position by pulling it upward relative to the lower housing 14 once a cutting operation is completed. This depicted configuration enables the tool 10 to be re-used for subsequent catheter cutting procedures without the need to replace the device after each use.

[0065] In some embodiments configured for multiple use, the materials of the upper housing 12, lower housing 14, and blade 16 may be selected to withstand repeated cleaning or sterilization cycles, such as autoclaving or chemical disinfection, without degradation of performance.

[0066] As illustrated in Fig. 7 and Figs. 6C and 6G, this embodiment of the catheter cutting tool 10 includes only a first pair of lugs 26a and omits both the second pair of lugs 26b and the associated post-use locking arrangement described in the single-use embodiment. In the absence of a locking mechanism, the upper housing 12, after completing a cutting stroke and severing the catheter tubing, can be manually returned to its raised, open position simply by pulling it upward relative to the lower housing 14. The depicted configuration allows the device to be reset immediately for a subsequent cutting operation without destruction or disassembly, enabling continuous cycles of catheter preparation. The simplified lug arrangement supports smooth upward and downward motion of the upper housing 12, allowing healthcare providers to transition quickly between cuts. By facilitating repeated operation, this multiple-use version of the catheter cutting tool 10 provides a practical and cost-effective solution for settings where catheter trimming procedures are performed frequently, such as high-volume hospital wards, catheterization labs, or outpatient procedure rooms.

[0067] As illustrated in Fig. 7 and further in Fig. 3, the upper housing 12 of the catheter cutting tool 10 is provided with a handle feature 28 positioned at its uppermost portion. The handle 28 is configured to serve as a dedicated grip point, enabling the operator to apply a controlled upward force to reposition the upper housing 12 relative to the lower housing 14. Its location at the top extremity is selected to maximize leverage and provide clear accessibility during tool manipulation. In use, the healthcare provider may grasp the handle 28 with one hand while stabilizing the lower housing 14 with the other. When the device is to be reset for reuse following a completed cutting stroke, the handle 28 is pulled upward in a controlled manner, returning the upper housing 12 to its raised, open position. This motion re-exposes and aligns the catheter-receiving apertures 24 in the lower housing 14, readying the tool for insertion of a fresh section of catheter tubing for the next cut.

[0068] In some embodiments, the handle 28 may be integrally moulded with the upper housing 12, while in other embodiments it may be a separately manufactured component fastened or over-moulded onto the housing. The grip portion may have a variety of ergonomically-contoured shapes, such as a curved ridge, loop, recessed finger well, or textured surface, to enhance comfort and prevent slippage during operation. The handle 28 may also be formed from or coated with an elastomeric or high-friction material to improve tactile control, particularly when the user is wearing gloves.

[0069] As used herein, the terms “proximal,” “bottom,” “down,” or “lower” refer to a portion or location of the device that, in its normal operating orientation, is closest to the medical practitioner and farthest from the patient. Conversely, the terms “distal,” “top,” “up,” or “upper” refer to a portion or location of the device that, in its normal operating orientation, is farthest from the medical practitioner and closest to the patient. For example, in relation to a needle, the distal region may be the region containing the needle tip intended for insertion into the patient (e.g., into a vein). In the context of the present catheter cutting tool, the terms “proximal” and “distal” are applied analogously to indicate relative positioning of components with respect to the operator and the patient.

[0070] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting of the present disclosure. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” include the plural forms. As used herein, the term “and / or” refers to any one of the listed items, any combination of two or more of the listed items, or all of the listed items. It will be understood that, as used herein, the terms “comprises,” “comprising,” “includes,” and / or “including” indicate the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof, unless expressly stated otherwise. Unless expressly defined herein, all terms (including technical and scientific terms) are to be given their meaning as commonly understood by one of ordinary skill in the art relevant to this disclosure, and are to be interpreted in a manner consistent with their usage in this specification and in the relevant art, without being limited to an idealized or overly formal sense.

[0071] As used herein, the terms “coupled,” “connected,” and “fitted” refer to a relationship between two or more elements in which the elements are joined or associated, either directly or indirectly, and not necessarily mechanically, unless expressly stated otherwise.

[0072] References herein to “some embodiments,” “one embodiment,” “certain embodiments,” “an embodiment,” “some examples,” “one example,” or similar terms indicate that a particular feature, structure, or characteristic described in connection therewith is included in at least one embodiment of the present disclosure. The appearances of such terms in various places in this disclosure are not necessarily all referring to the same embodiment. Unless otherwise indicated, individual features, structures, or characteristics described in connection with separate embodiments may be combined in any suitable manner in one or more embodiments without limitation.

[0073] While aspects of the present disclosure have been described in detail with reference to certain illustrated embodiments and / or examples, it will be understood by those skilled in the art that various modifications, substitutions, and variations are possible without departing from the scope of the present disclosure. The disclosure is not limited to the precise constructions, arrangements, or compositions described herein, and expressly encompasses all combinations and sub-combinations of the features and elements previously described, whether expressly claimed or not. The description is provided for purposes of clarity and illustration only and should not be construed as limiting. Terms used herein are to be accorded their ordinary and customary meaning in the relevant art unless expressly defined otherwise. The foregoing summary and description are illustrative, not restrictive. Additional aspects, embodiments, and features will become apparent to those skilled in the art upon consideration of the appended claims.

Claims

CLAIMS:

1. A catheter cutting tool (10) comprising: a lower housing (14) having a front wall (18) and a back wall (20) defining a gap (22) therebetween, each wall including at least one catheter-receiving aperture (24) configured to align with a corresponding aperture in the other wall; an upper housing (12) mounted for guided movement relative to the lower housing (14) between an open position and a closed position; a cutting blade (16) operatively supported in the upper housing (12) and oriented to pass through the gap (22) between the front wall (18) and the back wall (20) to sever catheter tubing positioned in the aligned catheter-receiving apertures (24); and at least one retention feature (26, 26a, 26b) positioned on the lower housing (14) and configured to engage a corresponding slider element (34) on the upper housing (12) to selectively maintain the tool (10) in at least one of:(i) an open position prior to use; and(ii) a closed position after use, wherein the retention feature (26, 26a, 26b) and the slider element (34) are shaped and positioned to guide relative movement of the housings (12, 14) and to maintain alignment of the cutting blade (16) with the catheter tubing during operation.

2. The catheter cutting tool (10) as claimed in claim 1 , wherein the retention feature comprises a first pair of lugs (26a) disposed on opposing sides of the lower housing (14), each lug (26a) defining an inner side wall (36a) and an outer side wall (36b).

3. The catheter cutting tool (10) as claimed in claim 2, wherein the inner side wall (36a) has a tapered profile configured to facilitate movement of a locking profile (38) of the slider element (34) past the lug (26a) during engagement.

4. The catheter cutting tool (10) as claimed in claim 1 , wherein the retention feature further comprises a second pair of lugs (26b) positioned below the first pair of lugs (26a) to form a post-use locking arrangement preventing separation of the upper housing (12) from the lower housing (14) after the cutting operation.

5. The catheter cutting tool (10) as claimed in claim 4, wherein the upper housing (12) is irreversibly locked to the lower housing (14) in the closed position after the cutting operation, rendering the tool (10) suitable for single-use applications.

6. The catheter cutting tool (10) as claimed in claim 5, further comprising tamper-evident or frangible features configured to indicate any attempt to reopen the tool (10) after use.

7. The catheter cutting tool (10) as claimed in claim 1 , wherein the upper housing (12), lower housing (14), and cutting blade (16) are formed from materials resistant to repeated cleaning or sterilization.

8. The catheter cutting tool (10) as claimed in claim 1 , wherein the front wall (18) and back wall (20) are configured to coaxially support the catheter tubing at two spaced-apart locations to maintain axial alignment during cutting.

9. The catheter cutting tool (10) as claimed in claim 9, wherein the catheter-receiving apertures (24) are dimensioned to accommodate a range of catheter French sizes and optionally shaped to include tapered, chamfered, or elastomeric lining portions.

10. The catheter cutting tool (10) as claimed in claim 1 , wherein the upper housing (12) comprises a handle feature (28) positioned at its uppermost portion for grasping by a user to facilitate movement of the upper housing (12) between the open and closed positions.

11. The catheter cutting tool (10) as claimed in claim claim 10, wherein the handle feature (28) is integrally formed with the upper housing (12) or attached thereto, and comprises a loop, ridge, recess, or textured surface to improve grip.

12. The catheter cutting tool (10) as claimed in claim 1, wherein the slider element (34) includes a locking profile (38) configured to engage the first lugs (26a) in a raised position to maintain the upper housing (12) open prior to use.

13. The catheter cutting tool (10) as claimed in claim 1, further comprising guiding means between the upper housing (12) and the lower housing (14) to control linear movement, the guiding means comprising guide rails, bushings, or low-friction surfaces.

14. The catheter cutting tool (10) as claimed in claim 1 , wherein the gap (22) between the front wall (18) and the back wall (20) is dimensioned to provide lateral clearance not exceeding a predetermined value to maintain blade path stability.

15. The catheter cutting tool (10) as claimed in claim 1, wherein the cutting blade (16) is fixedly mounted within the upper housing (12) in a perpendicular orientation to the longitudinal axis of the catheter tubing.

16. The catheter cutting tool (10) as claimed in claim 25, wherein the cutting blade (16) has a straight cutting edge, angled cutting edge, curved edge, or serrated edge or micro- serrated edge configured to produce a clean cut without fraying.

17. The catheter cutting tool (10) as claimed in claim 1 , wherein the catheter-receiving aperture(s) (24) are dimensioned with a tolerance between 0.01 mm and 0.5 mm greater than the outer diameter of the corresponding catheter size.

18. The catheter cutting tool (10) as claimed in claim 1 , wherein the upper housing (12) further comprises at least one internal guide channel configured to direct the cutting blade (16) along a predetermined vertical path.

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