Device and system for delivering a fluid

Abstract

A fluid delivery system has a fluid delivery device configured to deliver a fluid in a spray form. The fluid can be a first fluid and a second fluid mixed together in a manner that causes the first fluid to be delivered in a spray form. The first fluid can be a viscous fluid, such as a hemostatic agent, and the second fluid can be a pressurized fluid. The second fluid can be directed at the first fluid to cause the first fluid to be delivered in a spray form. The fluid delivery device can be adjustable to adjust the spray form. A lumen through the fluid delivery device and through the fluid delivery system is formed by a channel wall and is not interrupted by additional / separate components (e.g., valves, etc.) that affect fluid flow through the lumen.

Description

Cross-references to related applications

[0001] This application claims priority to U.S. Provisional Application No. 63 / 623,582, filed January 22, 2024, the entire disclosure of which is hereby incorporated herein by reference for all purposes. Technical Field

[0002] This disclosure generally relates to the field of apparatus, systems, and methods for delivering fluids to a patient. More specifically, this disclosure relates to apparatus, systems, and methods for delivering fluids to a patient in the form of a spray. Even more specifically, at least one of the fluids may be a viscous fluid, such as a hemostatic fluid. Alternatively or additionally, the apparatus, systems, and methods may be configured to deliver fluids within a patient's body. Background Technology

[0003] Various medical procedures involve delivering materials to a patient (e.g., fluids, such as liquids, such as water or saline solution; or gases, such as air, carbon dioxide, etc.; or solids, such as powders or films; etc.). For example, medical procedures within a patient may require simple, rapid, and effective hemostasis, which can be achieved by delivering hemostatic materials. Hemostatic materials can be delivered in powder or fluid form. Typically, hemostatic materials in fluid form are viscous. There is growing interest in minimally invasive procedures (e.g., transcavitary, transcatheter, endoscopic, etc.) that do not require open surgery (cutting open the patient) but instead access the target or treatment site within the patient through natural orifices and / or body passages (or, in some cases, small incisions that are not considered part of an open surgical incision). Understandably, delivering materials into a patient using minimally invasive methods often requires the use of sufficiently small tubular structures to navigate within natural body passages. Moreover, it is further understandable that delivering viscous fluids through the lumen of tubular structures capable of delivering materials into the patient presents various challenges. The viscosity of the fluid often requires higher pressures than those required for delivering less viscous or non-viscous fluids. Furthermore, if a spray is desired, the force required to propel the fluid is greater than that required to deliver the fluid entirely in a non-spray form. It is precisely because of these and other considerations that this improvement may be useful. Summary of the Invention

[0004] The present invention provides a simplified description of the selected concepts, which will be further detailed in the following detailed description. This summary is not intended to necessarily identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. Those skilled in the art will understand that each of the aspects and features of this disclosure may be advantageously used alone in some cases, or in combination with other aspects and features of this disclosure in others, whether or not they are described in this summary. The inclusion or exclusion of elements, components, etc., in this summary is not intended to limit the scope of the claimed subject matter.

[0005] According to various principles of this disclosure, a fluid delivery device includes: a proximal end; a distal end; a first lumen extending through the fluid delivery device to deliver a first fluid to the distal end of the fluid delivery device; and a second lumen extending through the fluid delivery device to deliver a second fluid to the distal end of the fluid delivery device. In some aspects, the first lumen and the second lumen terminate and open at a distal delivery end of the fluid delivery device to deliver the first fluid and the second fluid to the distal delivery end and to mix the first fluid and the second fluid for delivery in a spray form.

[0006] In some aspects, the first lumen and the second lumen are arranged concentrically relative to each other. In some aspects, the proximal end is configured to be fluidly connected to a tubular elongated member defining a first lumen concentrically positioned within the second lumen, the first lumen of the fluid delivery device is configured and positioned to be fluidly connected to the first lumen of the tubular elongated member, and the second lumen of the fluid delivery device is configured and positioned to be fluidly connected to the second lumen of the tubular elongated member.

[0007] In some aspects, the fluid delivery device includes an inner fluid delivery device body defining a first lumen extending longitudinally therethrough and having an outer surface in which one or more grooves defining a second lumen are provided. In some aspects, a distal delivery end of the fluid delivery device defines one or more channels therethrough, the one or more grooves defining the second lumen being fluidly connected to a corresponding channel in the one or more channels to define the second lumen. In some aspects, the one or more channels terminate and open at a proximal, inwardly tapering distal end of the distal delivery end to direct a second fluid toward the first fluid as the first fluid exits the first lumen, thereby delivering the first and second fluids in a spray form. In some aspects, the fluid delivery device further includes an outer fluid delivery device body defining an interior, wherein the inner fluid delivery device body is positioned within the interior of the outer fluid delivery device body, the interior of the outer fluid delivery device body together with the one or more grooves in the outer surface of the inner fluid delivery device body defining the second lumen. In some aspects, the inner fluid delivery device body and the outer fluid delivery device body are movable relative to each other to regulate the flow of fluid through the distal delivery end of the fluid delivery device. In some aspects, the internal fluid delivery device body has a distal end with slits extending through it, and the spacing between the slits can be adjusted by moving and contacting the distal end of the internal fluid delivery device body relative to the distal end inside the external fluid delivery device body to regulate the fluid delivered in the form of a spray.

[0008] In some aspects, the proximal end is configured to be fluidly connected to a first lumen of a tubular elongated member, the first lumen of the tubular elongated member being configured to deliver a first fluid to the first lumen, and a second lumen of the fluid delivery device is configured to be fluidly connected to a second lumen of the tubular elongated member, the second lumen of the tubular elongated member being fluidly isolated from the first lumen of the tubular elongated member and configured to deliver a second fluid to the second lumen.

[0009] According to various principles of this disclosure, a fluid delivery system includes a fluid delivery device and a tubular elongated member. In some aspects, the fluid delivery device includes: a proximal end; a distal end; a first lumen defined through the fluid delivery device to deliver a first fluid to the distal end of the fluid delivery device; and a second lumen defined through the fluid delivery device to deliver a second fluid to the distal end of the fluid delivery device. In some aspects, the tubular elongated member defines: a first lumen having a distal end fluidly connected to the first lumen of the fluid delivery device and a proximal end capable of fluidly connecting to a first fluid source; and a second lumen having a distal end fluidly connected to the second lumen of the fluid delivery device and a proximal end capable of fluidly connecting to a second fluid source. In some aspects, the first lumen of the fluid delivery device and the first lumen of the tubular elongated member define the first lumen of the fluid delivery system; the second lumen of the fluid delivery device and the second lumen of the tubular elongated member define the second lumen of the fluid delivery system, the second lumen of the fluid delivery system being fluidly isolated from the first lumen of the fluid delivery system; and the first and second lumens of the fluid delivery system terminating and opening at the distal delivery end of the fluid delivery device to deliver a first fluid and a second fluid to the distal delivery end and to mix the first fluid and the second fluid for delivery in a spray form.

[0010] In some respects, the first and second lumens of the system are generally continuous lumens, defined by channel walls in the fluid delivery device and the tubular elongated member, and not interrupted by individual components located therein.

[0011] In some aspects, the first lumen of the tubular elongated member is fluidly connected to a fluid source for a viscous first fluid, and the second lumen of the tubular elongated member is fluidly connected to a fluid source for a pressurized second fluid. In some aspects, the distal delivery end of the fluid delivery device tapers inward toward the proximal end to direct the pressurized second fluid exiting the second lumen of the fluid delivery system toward the viscous first fluid exiting the first lumen of the fluid delivery system, thereby delivering the viscous first fluid in a spray form.

[0012] In some aspects, the fluid delivery device includes an internal fluid delivery device body defining a first lumen extending longitudinally therethrough and having an outer surface having one or more grooves defining a second lumen of the fluid delivery device body; and the second lumen of the tubular elongated member engages with the exterior of the fluid delivery device body to form the second lumen of the fluid delivery device body together with the one or more grooves.

[0013] In some aspects, the fluid delivery device includes an external fluid delivery device body defining an interior therein and an internal fluid delivery device body positioned within the interior of the external fluid delivery device body; and the external fluid delivery device body and the internal fluid delivery device body are movable relative to each other to adjust the spray pattern of the fluid exiting therefrom.

[0014] According to various principles of this disclosure, a method for delivering fluid in the form of a spray includes: delivering a first fluid through a first cavity of a fluid delivery device to exit through a distal delivery end of the fluid delivery device; and delivering a second fluid through a second cavity of the fluid delivery device to exit through the distal delivery end and combine with the first fluid, thereby delivering the first fluid in the form of a spray.

[0015] In some aspects, the method further includes delivering a second fluid as a pressurized fluid, the pressurized fluid causing the first fluid to be delivered in the form of a spray from a distal delivery end of the fluid delivery device.

[0016] In some aspects, the method further includes directing the distal outlet end of the second cavity of the fluid delivery device to the distal outlet end of the first cavity of the fluid delivery device, so that the first fluid is delivered from the distal delivery end of the fluid delivery device in the form of a spray.

[0017] In some aspects, the method also includes conveying a first fluid through a first lumen and a second fluid through a second lumen, but without separate components within the first and second lumens.

[0018] These and other features and advantages of this disclosure will become apparent from the following detailed description, the scope of which is set forth in the appended claims. While the following disclosure is presented in the form of aspects or embodiments, it should be understood that each aspect may be claimed individually or in combination with aspects and features of that embodiment or any other embodiment. Attached Figure Description

[0019] Non-limiting embodiments of this disclosure are described by way of example with reference to the accompanying drawings, which are schematic and not intended to be drawn to scale. The drawings are provided for illustrative purposes only, and the dimensions, positions, order, and relative sizes reflected in the figures may vary. For example, devices may be enlarged to make details discernible, but are intended to be scaled down relative to, for example, the working channel of a delivery catheter or endoscope to fit within said working channel. In the drawings, identical or nearly identical or equivalent elements are generally denoted by the same reference numerals, and similar elements are generally denoted by similar reference numerals incremented by 100 but different, with redundant descriptions omitted. For clarity and simplicity, not every element is labeled in every figure, and not every element of every embodiment is shown where the description is unnecessary for those skilled in the art to understand this disclosure.

[0020] The detailed embodiments will be better understood in conjunction with the accompanying drawings, wherein the same reference numerals denote the same elements:

[0021] Figure 1 An example perspective view of an embodiment of a fluid transport system formed according to various aspects of this disclosure is shown.

[0022] Figure 2A The distal portion of a fluid transport system formed according to various principles of this disclosure is shown in partial cross-section, illustrating an example of an embodiment of a fluid transport device.

[0023] Figure 2B Show Figure 2A A near-side perspective view of the main body of the fluid transport device.

[0024] Figure 2C Show Figure 2A and Figure 2B An enlarged view of the distal end of the main body of the fluid delivery device shown.

[0025] Figure 3 The distal portion of the fluid transport system formed according to various principles of this disclosure is shown in a partially exploded cross section, illustrating an example of an embodiment of the fluid transport device.

[0026] Figure 4A The distal portion of the fluid transport system formed according to various principles of this disclosure is shown in partial decomposition and partial cross-section, with perspective views varying along different sides of the fracture line of the fluid transport device, to show a perspective view of the distal end of an example embodiment of the fluid transport device and a perspective view of the proximal end of the fluid transport device.

[0027] Figure 4B Show Figure 4A An enlarged view of the distal end of the main body of the fluid delivery device shown.

[0028] Figure 5A cross-sectional view showing an example embodiment of a tubular elongated member having an outer lumen and an inner lumen.

[0029] Figure 6 A cross-sectional view showing an example embodiment of a multi-lumen tubular elongated member. Detailed Implementation

[0030] The following detailed description should be read with reference to the accompanying drawings, which depict illustrative embodiments. It should be understood that this disclosure is not limited to the specific embodiments described, as these embodiments can vary. All devices, systems, and methods discussed herein are examples of devices and / or systems and / or methods implemented according to one or more principles of this disclosure. Each example of an embodiment is provided by way of explanation and is not the only way to implement these principles, but merely an example. Therefore, references to elements or structures or features in the drawings should be understood as references to examples of embodiments of this disclosure and should not be construed as limiting this disclosure to the specific elements, structures, or features shown. After reading this disclosure, other examples of ways of implementing the disclosed principles will be apparent to those skilled in the art. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from the scope or spirit of the subject matter. For example, a feature shown or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, this subject matter is intended to cover such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0031] It should be understood that this disclosure is presented in various levels of detail throughout this application. In some cases, details that are unnecessary for a person of ordinary skill in the art to understand this disclosure, or details that make other details difficult to perceive, may have been omitted. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope beyond the appended claims. Unless otherwise defined, the technical terms used herein should be understood to have the meaning commonly understood by a person of ordinary skill in the art to which this disclosure pertains. All apparatuses and / or methods disclosed and claimed herein can be made and performed in accordance with this disclosure without excessive experimentation.

[0032] As used herein, “proximal” refers to the direction or location closest to the user (medical professional, clinician, technician, operator, or physician, etc.; these terms are used interchangeably herein and are not intended to be limiting, and include automated control systems, etc.), such as during use of the device (e.g., introducing the device into a patient, or during implantation, positioning, or delivery), and / or closest to the delivery device; and “distal” refers to the direction or location furthest from the user, such as during use of the device (e.g., introducing the device into a patient, or during implantation, positioning, or delivery), and / or furthest from the delivery device. “Longitudinal” refers to extending along the longer or larger dimension of the element. “Longitudinal axis” extends along the longitudinal extension of the element, although it is not necessarily straight and does not necessarily remain fixed when the element is bent or folded, and “axial” generally refers to along the longitudinal axis. However, it should be understood that reference to axial or longitudinal movement of the aforementioned system or its elements is not strictly limited to axial and / or longitudinal movement along the longitudinal axis or central axis of the referenced element. "Center" means at least substantially bisecting the center point and / or substantially equidistant from the periphery or boundary, and "central axis" relative to an opening means a line that at least substantially bisects the center point of the opening, extending longitudinally along the length of the opening when the opening comprises, for example, a tubular element, a support, a channel, a cavity, or a hole. As used herein, "cavity," "channel," "hole," or "passage" is not limited to a circular cross-section. As used herein, the "free end" of an element is the end beyond which the element does not extend. It should be understood that terms such as at an end, on an end, near an end, or along an end are used interchangeably herein and are not intended to be restrictive unless otherwise stated, and are intended to indicate a general relative spatial relationship rather than a precisely restrictive location. Finally, references to "at" a location or part are intended to include the location or part and / or its vicinity (e.g., along it, adjacent to it, near it, etc.). As understood herein, the corresponding references are intended to convey relationships between parts, sections, elements, etc., configured to interact with each other or to have another anticipated relationship.

[0033] Open surgery (involving incisions in the patient's body to obtain access to the patient's body and internal anatomy) or laparoscopy (typically involving smaller incisions to access the patient's body and internal anatomy) are typical options for performing surgery within the patient's body. This approach involves longer recovery times compared to transluminal (e.g., endoscopic) methods, which do not involve incisions but instead typically access internal anatomy via natural openings and advance devices, tools, apparatus, etc., transluminally (through the lumen of a tubular element, such as a catheter, sheath, endoscope, etc.) to the target area / treatment site. This disclosure describes fluid delivery devices, systems, and methods configured to deliver materials, such as transluminal materials, within the patient's body. Delivering materials through the lumen of a tubular element small enough to be advanced into and within the patient's body can present various challenges, as described above. In particular, in some cases, internal procedures involve the cutting of tissue (potentially bleeding) or the repair of tissue that may have already bled (e.g., a hemorrhagic ulcer). Delivering hemostatic materials to stop internal bleeding within the patient's body is particularly challenging because hemostatic fluid materials tend to be highly viscous. For example, considerable force may be required to propel highly viscous fluids through narrow openings or lumens, such as tubular structures sized for insertion within a patient's body (e.g., through a patient's body passage). Traditionally, syringes are used to deliver therapeutic fluids to patients. However, the force that can be applied to a syringe may not be sufficient to propel highly viscous materials into the patient's body in the desired manner, such as in the form of a spray.

[0034] The apparatus, systems, and methods of this disclosure are designed to deliver materials to a treatment site within a patient. According to various principles of this disclosure, the materials can be viscous (e.g., highly viscous, such as up to about 2000 cP), adhesive-type materials, or hemostatic materials / agents (e.g., fibrin). Hemostatic materials may be selected to create a protective layer that minimizes delayed bleeding, potential perforation, and / or stenosis formation within the patient. Potential clinical uses include, but are not limited to, post-resection (e.g., endoscopic mucosal resection (EMR), endoscopic submucosal dissection (ESD), polyp removal, etc.), suture reinforcement, fistula sealing, and site closure after peroral endoscopic myotomy (POEM).

[0035] According to various principles of this disclosure, a fluid delivery device configured to deliver material within a patient's body includes a nozzle. In some aspects, the fluid delivery device may alternatively be referred to as a fluid nozzle without limitation. In some aspects, the nozzle is configured to deliver a viscous material. Alternatively or additionally, in some aspects, the nozzle is configured to deliver the material in the form of a spray. Alternatively or additionally, in some aspects, the nozzle has a distal end forming a distal delivery end and a proximal end configured to be fluidly coupled to one or more fluid delivery lumens (such as lumens formed through corresponding one or more tubular fluid delivery elements). In some aspects, a fluid delivery nozzle formed according to various principles of this disclosure has at least a first lumen through which a first (e.g., viscous) fluid (such as a hemostatic material / pharmaceutical) can be delivered; and a second lumen through which a second (e.g., propellant) fluid (e.g., air or carbon dioxide) can be delivered. The nozzle may be formed from a single, monolithic nozzle body defining the first and second lumens, or may be formed as a two-piece nozzle body defining the first and second lumens. The first and second lumens have distal delivery openings that open near the distal delivery end of the nozzle. In some respects, a nozzle includes an inner lumen and an outer lumen.

[0036] According to various principles of this disclosure, nozzles and associated systems and methods are used to deliver a viscous fluid through a first cavity and a propellant fluid (such as pressurized gas) through a second cavity. The material delivered and conveyed through the first and second cavities exits the distal delivery end of the nozzle, and the propellant fluid disperses the viscous fluid into a spray form. In some aspects, the nozzle can be adjusted to regulate various parameters, such as the volume of the fluid spray, the application area, and the droplet size.

[0037] According to various other principles of this disclosure, a fluid delivery system includes a tubular elongated member fluidly connected between and to a lumen of a fluid delivery device and a fluid source for delivering fluid to the fluid delivery system. The tubular elongated member may include one or more tubular members or shafts defining one or more lumens, the one or more lumens being configured and positioned for fluid connection with a corresponding lumen of the fluid delivery device.

[0038] Various embodiments of fluid transport devices and systems, and related methods, will now be described with reference to the examples shown in the accompanying drawings. References to “one embodiment,” “embodiment,” “some embodiments,” “other embodiments,” etc., throughout this specification indicate that one or more specific features, structures, concepts, and / or characteristics based on the principles of this disclosure may be included in the content associated with that embodiment. However, such references do not necessarily imply that all embodiments include that specific feature, structure, concept, and / or characteristic, or that an embodiment includes all features, structures, concepts, and / or characteristics. Some embodiments may include one or more such features, structures, concepts, and / or characteristics in various combinations thereof. It should be understood that one or more of the features, structures, concepts, and / or characteristics described with reference to one embodiment may be combined with one or more of the features, structures, concepts, and / or characteristics of any other embodiment provided herein. That is, any of the features, structures, concepts, and / or characteristics described herein may be mixed and matched to create hybrid embodiments, and such hybrid embodiments are within the scope of this disclosure. Furthermore, references to “one embodiment,” “embodiment,” “some embodiments,” “other embodiments,” etc., throughout the specification do not necessarily refer to the same embodiment, and individual or alternative embodiments are not necessarily mutually exclusive with other embodiments. It should also be understood that the various features, structures, concepts, and / or characteristics of the disclosed embodiments are independent and separate from each other, and can be used individually or in various combinations thereof to create alternative embodiments that are considered part of this disclosure. Therefore, this disclosure is not limited to the embodiments specifically described herein, as describing all the numerous possible combinations and sub-combinations of features, structures, concepts, and / or characteristics would be overly cumbersome, and the examples of embodiments disclosed herein are not intended to limit the broader aspects of this disclosure. It should be understood that the various dimensions provided herein are examples, and those skilled in the art can readily determine appropriate ranges of standard deviations and acceptable variations covered by this disclosure and any claims associated therewith. The following description is merely illustrative of embodiments and is not intended to limit the broader aspects of this disclosure.

[0039] It should be understood that common features are identified by common reference elements, and for the sake of brevity and convenience, and not intended to be limiting, descriptions of common features are generally not repeated. For clarity, not all parts having the same reference numerals are numbered. Furthermore, a group of similar elements may be indicated by numbers and letters, and one or more such elements or a group of such elements may be generally referred to by numbers only (excluding the letters associated with each similar element). It should be understood that in the following description, similar elements or parts between the various illustrated embodiments are generally designated by the same reference numerals, which are incremented by multiples of 100, and redundant descriptions are generally omitted for brevity. Furthermore, certain features in one embodiment may be used across different embodiments and are not necessarily labeled separately when appearing in different embodiments.

[0040] Now turn to the attached diagram. Figure 1 An example embodiment of a fluid delivery device 100 of a fluid delivery system 150 is shown, both formed according to various principles of this disclosure. It will be understood that the fluid delivery device 100 is disposed at a distal end 150d of the fluid delivery system 150, and a tubular elongated member 160 extends proximally from the fluid delivery device 100. One or more fluid sources 1000 are fluidly coupled to the tubular elongated member 160 at a proximal end 150p of the fluid delivery system 150 to deliver fluid to the fluid delivery device 100. The fluid sources 1000 may be fluidly coupled to the tubular elongated member 160 via a fluid connector 170 (described further in detail below). In some aspects, one or more fluids are delivered by one or more respective fluid sources 1000 to one or more respective lumens of the tubular elongated member 160 (e.g., corresponding to each fluid source 1000), as described further in detail below.

[0041] Fluid delivery system 150 is configured to deliver fluid within a patient's body. For example, a tubular elongated member 160 may be formed of a sufficiently flexible material to be inserted into and guided through the patient's body, such as through tortuous natural bodily passages, to deliver fluid delivery device 100 to the treatment site where fluid is to be delivered (e.g., applied to a treatment site). For example, the tubular elongated member 160 may be formed of materials such as polytetrafluoroethylene (PTFE); block copolymer variants of PEBA (polyether block amide), such as PEBAX®; polyether ether ketone (PEEK), etc., such as in braided catheters, single-lumen extrusions, or other suitable forms known to those skilled in the art. Figure 1 As shown, the fluid delivery device 100 is configured to deliver fluid in the form of a spray 1100. This form of fluid delivery may be beneficial for rapidly, efficiently, and effectively depositing fluid onto the treatment site.

[0042] Figure 1 An example embodiment of the fluid delivery system 150 shown is configured to deliver a first fluid through a first lumen and a second fluid through a second lumen, the lumens converging at a distal end 150d of the fluid delivery system 150 to mix the fluids and produce a desired spray form 1100. According to various further principles of this disclosure, the first fluid may be a viscous fluid, and the second fluid may be a less viscous fluid (e.g., a gas, such as air or CO2), which can be used as a propellant for the first fluid, such that when the first and second fluids are mixed at the distal end 150d of the fluid delivery system 150, the second fluid disperses and delivers the first fluid in a spray form. According to various principles of this disclosure, the fluid delivery device 100 is configured to facilitate the mixing of the first and second fluids to result in the delivery of the first fluid in a spray form, as will now be described.

[0043] Turning Figure 2A , Figure 2B and Figure 2C The distal portion of a fluid delivery system 150 formed according to various principles of the present disclosure is shown to illustrate an example of an embodiment of a fluid delivery device 200. According to various principles of the present disclosure, the fluid delivery device 200 includes a fluid delivery device body 210 (which may alternatively be referred to as a nozzle body 210) defining a first lumen 211 and a second lumen 213, through which a first fluid is delivered to a treatment site and a second fluid is delivered to a treatment site through the second lumen 213. In the illustrated embodiment example, the first lumen 211 is substantially longitudinally through the internal cavity defined by the fluid delivery device body 210, such as axially through the center of the fluid delivery device body 210, such as... Figure 2B As shown in the diagram. In some aspects, the second lumen 213 includes one or more lumens, such as... Figure 2B and Figure 2C As shown, they work together to transport the second fluid. More specifically, in Figure 2A , Figure 2B and Figure 2C In an embodiment example of the fluid delivery device body 210 shown, the second lumen 213 includes one or more external grooves or channels on the outer surface of the fluid delivery device body 210. The distal end 210d of the fluid delivery device body 210 tapers to form a distal delivery end 212 of the fluid delivery device 200, the distal delivery end 212 having one or more channels 215 passing through it, the channels 215 having a proximal end 215p in fluid communication with one or more second lumens 213, and a distal open end 215d exiting the distal end 200d of the fluid delivery device 200, to deliver a second fluid to a treatment site, such as by mixing with a first fluid exiting the distal open end 211d of the first lumen 211 to form a spray form 1100. In some aspects, the distal end 212d of the distal delivery end 212 may taper proximally inward to facilitate mixing of the second fluid exiting the second lumen 213 with the first fluid exiting the first lumen 211. It should be understood that... Figure 2A , Figure 2B and Figure 2C The embodiment of the fluid delivery device body 210 shown is an example of a single, monolithic component. However, other embodiments include two or more separately formed components that together form the fluid delivery device body, as described in further detail below.

[0044] The proximal end 200p of the fluid delivery device 200 is fluidly connected to the distal end 160d of the tubular elongated member 160, so as to deliver a first fluid and a second fluid through the lumens 211 and 213 of the fluid delivery device body 210, respectively, and exit from the distal end 200d of the fluid delivery device 200 to deliver the fluid in the form of a spray 1100. The distal portion of the fluid delivery system 150 is in Figure 2A The diagram is shown in exploded and partial cross-sectional views to illustrate a first lumen 161 and a second lumen 163 defined by a tubular elongated member 160. More specifically, an example embodiment of the illustrated tubular elongated member 160 is formed by a first tubular member 162 defining the first lumen 161 and a second tubular member 164 defining the second lumen 163. In the illustrated example embodiment, the first tubular member 162 is an inner tubular member defining an inner lumen, and the second tubular member 164 is an outer tubular member defining an outer lumen. The first tubular member 162 may be disposed substantially concentrically within the second tubular member 164 to define a first lumen 161 extending substantially concentrically within and through the second lumen 163. However, other configurations are within the scope of this disclosure for fluid connection with corresponding lumens of an associated fluid transport device body. Thus, in Figure 2A , Figure 2B and Figure 2C In the illustrated embodiment example, the first lumen 161 of the tubular elongated member 160 and the first lumen 211 of the fluid delivery device body 210 are configured and positioned to be fluidly connected to each other. Similarly, the second lumen 163 of the tubular elongated member 160 and the second lumen 213 of the fluid delivery device body 210 are configured and positioned to be fluidly connected to each other. It is understood that the tubular elongated member 160 is fluidly connected to the proximal end 200p of the fluid delivery device 200 (e.g., along the indicated directional arrow) to deliver fluid to the distal end 200d of the fluid delivery device 200.

[0045] refer to Figure 2AIt is understood that the distal end 164d of the second tubular member 164 extends distally beyond the distal end 162d of the first tubular member 162 by a sufficient distance to extend on the outer surface of the fluid delivery device body 210, along which the second lumen 213 is formed. It is further understood that the portion of the fluid delivery device body 210 defining the second lumen 213 has an outer diameter smaller than the outer diameter of the proximal end 220p of the distal delivery end 212. The second tubular member 164 can thus extend on the exterior of the fluid delivery device body 210 defining the second lumen 213 until the distal end 164d of the second tubular member 164 abuts the proximal end 212p of the distal delivery end 212 (e.g., along the circumferential surface or shoulder defined by the proximal end 212p). Thus, although the second cavity 213 defined on the outside of the fluid delivery device body 210 can be an open channel, the interior of the second tubular member 164 surrounds this open channel to form a cavity together with the second cavity 213, through which the second fluid is delivered to the distal end 200d of the fluid delivery device 200. (Reference) Figure 2B and Figure 2C It can be further understood that the distal end 213d of the second lumen 213 is in fluid communication with the channel 215 that defines the lumen passing through the distal delivery end 212 of the fluid delivery device body 210.

[0046] refer to Figure 2A and Figure 2B Understandably, the first tubular member 162 may be fluidly connected to a proximal connecting extension 214, which extends proximally beyond the proximal end 213p of the second lumen 213 and the outer surface of the fluid delivery device body 210 defining the second lumen 213. The distal end 162d of the first tubular member 162 may be inserted into the first lumen 211 to form a preferred fluid-tight connection to fluidly separate the lumen formed by the first lumens 161, 211 from the lumen formed by the second lumens 163, 213, thereby isolating the first fluid and the second fluid from each other when the first fluid and the second fluid are delivered to the distal end 200d of the fluid delivery device 200. Alternatively, the distal end 162d of the first tubular member 162 may extend on the proximal connecting extension 214 to the proximal shoulder or surface 210p of the fluid delivery device body 210 radially inside the proximal end 213p of the second lumen 213, so that the first lumens 161, 211 are fluidly connected in a preferred fluid-sealed connection manner, thereby fluidly isolating the first fluid and the second fluid.

[0047] The fluid communication and fluid-tight connection between the tubular elongated member 160 and the fluid delivery device 200 allows fluid to be delivered from a fluid source and delivered to the treatment site via the tubular elongated member 160 and the fluid delivery device 200. More specifically, a first fluid can be delivered (from a first fluid source, as described in further detail below) through first lumens 161, 211 and exit from the distal end 211d of the first lumen 211. Furthermore, a second fluid can be delivered (from a second fluid source, as described in further detail below) through second lumens 163, 213 and exit from the distal end 215d of the channel 215. The first and second fluids exiting the respective distal ends 211d, 213d, 215d of lumens 211, 213 and channel 215 can mix or combine at the distal end 200d of the fluid delivery device 200.

[0048] According to various principles of this disclosure, a second fluid in the form of a pressurized fluid (such as pressurized gas) can disperse the first fluid to deliver the fluid in spray form 1100 to the treatment site. In some aspects, such as Figure 2C As shown and as described above, the distal end 212d of the distal delivery end 212 of the fluid delivery device 200 has a proximal inward tapering surface 212s that extends inward into the distal delivery end 212. The distal end 215d of the channel 215 passing through the distal delivery end 212 is therefore directly radially inward to direct the second fluid toward the first fluid as the first fluid exits the first lumen 211. This configuration better facilitates the mixing of the first and second fluids compared to the second fluid exiting the lumen 315 axially. Alternatively or additionally, this proximal tapering surface 212s widens distally, thus facilitating the dispersion of the first and second fluids in a wider spray pattern 1100 compared to a cylindrical surface surrounding the longitudinal axis LA of the fluid delivery device 200. In some respects, the proximal tapering surface 212s has a taper of approximately 90° (i.e., the surface tapers approximately 45° relative to the longitudinal axis LA of the fluid delivery device 200).

[0049] Instead of a fluid delivery device 200 having a fluid delivery body 210 (the fluid delivery body 210 defining a cavity for both a first fluid and a second fluid to be delivered thereto by a tubular elongated member 160), such as in Figure 2A , Figure 2B and Figure 2CAs shown, the fluid delivery device may have a two-piece fluid delivery body. For example, the fluid delivery device may be formed by an inner fluid delivery body fitted inside (e.g., a lumen, channel, etc.) of a substantially hollow outer fluid delivery body. The inner and outer fluid delivery bodies cooperate to form a first lumen and a second lumen for corresponding first and second fluids. An example embodiment of a fluid delivery system 150 having a distal portion of a fluid delivery device 300, 400 formed by at least two separately formed components is shown in [the original text]. Figure 3 as well as Figure 4A and Figure 4B As shown in the figure, it will now be described.

[0050] Turn now Figure 3 The diagram illustrates the distal portion of a fluid delivery system 150, representing another embodiment of a fluid delivery device 300. It is understood that the illustrated fluid delivery device 300 has a fluid delivery device body 310 consisting of an internal fluid delivery device body 310i (which may alternatively be referred to as an internal fluid nozzle, internal shaft, etc., without limitation) and an external fluid delivery device body 310o (shown in dashed lines to show the internal fluid delivery device body 310i, and which may alternatively be referred to as an air nozzle top cover, without limitation). Figure 2A Similarly, the distal portion of the fluid delivery system 150 is in Figure 3 The image is shown in exploded and partial cross-sectional views to illustrate the first lumen 161 and the second lumen 163 defined through the tubular elongated member 160, similar to... Figure 2A Those shown. Therefore, for the sake of brevity, a more detailed description of the elements of the tubular elongated member 160 is omitted, referring to the above. Figure 2A The description of the tubular elongated member 160 shown is substantially applicable to... Figure 3 The tubular elongated member 160 shown is referred to by the same reference numerals.

[0051] and Figure 2A , Figure 2B and Figure 2C The fluid conveying device body 210 of the fluid conveying device 200 shown is the same. Figure 3The internal fluid delivery device body 310i of the fluid delivery device 300 shown defines a first lumen 311 passing through it, and one or more second lumens 313 along its outer surface. However, instead of a second tubular member 164 surrounding the second lumen 313, the interior of the external fluid delivery device body 310o (in which the internal fluid delivery device body 310i is located) surrounds the originally open passage of the second lumen 313 in the outer surface of the internal fluid delivery device body 310i. The second tubular member 164 is thus inserted into a proximal coupling extension 314, which extends proximally from the proximal end 310ip of the internal fluid delivery device body 310i to the proximal shoulder or surface 310op of the external fluid delivery device body 310o to form a fluid-tight fit. A first tubular member 162 may be inserted into or onto the proximal coupling extension 314 to form a fluid-tight fit (e.g., a friction fit) relative to the internal fluid delivery device body 310i. Fluid sealing fits can be friction fits or friction fits reinforced by adhesives (e.g., UV adhesives).

[0052] In the illustrated embodiment example, the distal end 313d of the second lumen 313 terminates proximally to the distal delivery end 312o of the external fluid delivery device body 310o, which tapers distally (e.g., conical). The second fluid exits the second lumen 313 and enters the internal space defined by the distally tapered distal delivery end 312o, and combines with the first fluid exiting the first lumen 311 within the distally tapered distal delivery end 312o. In some aspects, the distal end 310id of the internal fluid delivery device body 310i tapers distally (e.g., conical), optionally with the same degree of taper as the distally tapered distal delivery end 312o of the external fluid delivery device body 310o. Figure 3 In the illustrated embodiment, one or more slits 315 are formed in the distal end 310id of the internal fluid delivery device body 310i, and a first fluid exits the first lumen 311 through the slits 315 to combine / mix with a second fluid within the distal delivery end 312o of the external fluid delivery device body 310o, which tapers distally. In some aspects, the slits 315 allow rapid contact between the viscous first fluid delivered through the external fluid delivery device body 310o and the second fluid delivered through the radial space between the slits 315 and the external fluid delivery device body 310o. Alternatively or additionally, the distal end 310od of the external fluid delivery device body 310o may have a proximal inwardly tapering surface 310os introduced inwardly into the distal end 310od. This proximal tapering surface 310os widens distally, thus promoting the dispersion of the first and second fluids in a wider spray pattern 1100 compared to a cylindrical surface surrounding the longitudinal axis LA of the fluid delivery device 300.

[0053] Understandably, with Figure 2A , Figure 2B and Figure 2C The embodiment of the fluid delivery device 200 shown is the same as that of the example shown. Figure 3 An example embodiment of the fluid delivery device 300 shown is in fluid communication with a tubular elongated member 160, which has a fluid-tight connection to allow fluid to be delivered from a fluid source and delivered to the treatment site via the tubular elongated member 160 and the fluid delivery device 300. In some aspects, the tapered distal end 310id of the inner fluid delivery device body 310i can be inserted sufficiently distally into the outer fluid delivery device body 310o to contact the inner surface of the distally tapered delivery end 312o of the outer fluid delivery device body 310o. Once the first tubular member 162 and the second tubular member 164 are respectively coupled to the inner fluid delivery device body 310i and the outer fluid delivery device body 310o, the relative positions of the inner fluid delivery device body 310i and the outer fluid delivery device body 310o can be set (e.g., no longer movable relative to each other, such as fixed relative to each other).

[0054] Understandably, Figure 2A , Figure 2B and Figure 2C The embodiment example of the fluid delivery device 200 shown may have a higher... Figure 3 The embodiment of the fluid delivery device 300 shown has a larger outer diameter. When intended for advancement through the working channel of an endoscope, the outer diameter of the fluid delivery devices 200 and 300 is typically less than about 2.7 mm (a typical inner diameter of the working channel of an endoscope), such as about 2.65 mm. However, fluid delivery device 200 is capable of applying the fluid in spray form 1100 to a treatment site with a diameter of about 45-50 mm, while fluid delivery device 300 can apply the fluid in spray form 1100 to a smaller treatment site area. Furthermore, both fluid delivery devices 200 and 300 typically apply the fluid in spray form 1100 at a substantially fixed spray angle.

[0055] Based on the various principles of this disclosure, a two-piece fluid delivery device (e.g., similar to...) Figure 3 The fluid delivery device 300 can be configured to allow adjustment of the spray angle for delivering fluid to the treatment site T in the form of a spray 1100. Figure 4A and Figure 4B In an example embodiment of the distal portion of the fluid delivery system 150 shown, the fluid delivery system 150 includes a fluid delivery device 400 having a fluid delivery device body 410, the fluid delivery device body 410 being formed as a two-piece body, similar to the fluid delivery device body 310 of the fluid delivery device 300. However, the formation Figure 4A and Figure 4B The internal fluid delivery device body 410i and the external fluid delivery device body 410o (shown in dashed lines to show the internal fluid delivery device body 410i) of the fluid delivery device body 410 of the fluid delivery device 400 shown in the diagram are movable relative to each other to allow adjustment of the fluid in the spray form 1100 (e.g., velocity, volume, spray area, etc.). Except for features and elements that allow the relative position of the internal fluid delivery device body 410i and the external fluid delivery device body 410o to be adjustable, the various features, elements, components, etc. of the fluid delivery device 400 are substantially the same as those of the fluid delivery device 300. Therefore, for the sake of brevity and without limitation, the description of the features, elements, components, etc. of the fluid delivery device 300 described above generally applies to the fluid delivery device 400 unless otherwise stated herein. For convenience, the same reference numerals used to indicate the features, elements, components, etc. of the fluid delivery device 300 are used, but with the addition of 100 to indicate the features, elements, components, etc. of the fluid delivery device 400. Similarly, the fluid connection between the tubular elongated member 160 and the proximal end 400p of the fluid delivery device 400 is as described above. Figure 3 The fluid transport device 300 shown is described in a generally similar manner. Therefore, for the sake of brevity and without any intention of limitation, the description above, with necessary modifications, applies to both the tubular elongated member 160 and the fluid transport device 400, referring to the detailed description of the fluid connection between the tubular elongated member 160 and the fluid transport device 300, wherein the same reference numerals are added 100 for features, elements, components, etc. of the fluid transport device 400.

[0056] Turn now Figure 4A The illustrated embodiment of the fluid delivery device 400 includes an internal fluid delivery device body 410i within an external fluid delivery device body 410o, similar to... Figure 3The fluid delivery device 300 shown is an example of an embodiment arrangement. However, referring to a proximal perspective end view of the fluid delivery device 400, it can be understood that one or more pull cords 420 extend proximally from the proximal end 410op of the outer fluid delivery device body 410o. In some embodiments, the pull cords 420 extend through a channel within the wall thickness of the outer fluid delivery device body 410o. However, other constructions (such as extending along the interior or exterior of the outer fluid delivery device body 410o, e.g., through an open channel / groove therein) are within the scope and spirit of this disclosure. Pulling one or more pull cords 420 proximally moves the outer fluid delivery device body 410o proximally relative to the inner fluid delivery device body 410i (which is in a fixed position). As described above, the fluid delivery device 400 has various features, elements, components, etc., common to the fluid delivery device 300, including a distal delivery end 412o that tapers distally from the outer fluid delivery device body 410o, and a distal end 410id that tapers distally from the inner fluid delivery device body 410i. Furthermore, similar to the internal fluid conveying device body 310i of the fluid conveying device 300, the internal fluid conveying device body 410i of the fluid conveying device 400 includes one or more slits 415. (Reference) Figure 4B It is understood that the distal end 410id of the internal fluid delivery device body 410i, which tapers distally, and the slit 415 passing through it, are configured similarly to a collet. Thus, the relative movement between the distal end 410od of the external fluid delivery device body 410o and the distal end 410id of the internal fluid delivery device body 410i alters the shape of the distal end 410id of the internal fluid delivery device body 410i and the spacing / width of the slit 415. This modification alters various characteristics (velocity, volume, spray area, etc.) of the fluid delivered in the spray form 1100, as will be understood by those skilled in the art. Those skilled in the art will further understand that various further adjustments can be made to the second fluid flow, such as adjustments to volumetric flow rate, flow velocity, pressure, etc., to adjust the manner, extent, and range by which the second fluid disperses the first fluid into the spray form 1100.

[0057] Understandably, the lumens of the various embodiments of the fluid delivery devices 200, 300, and 400 described above do not contain valves or other components located therein that could affect the flow of fluid through the lumen. Instead, the lumens provide a substantially unobstructed, generally continuous path / passage for fluid to flow from one or more fluid sources of the fluid delivery system 150 to a distal end 150d of the fluid delivery system 150, whereby one or more fluids are delivered by the fluid delivery system 150 to a patient. Similarly, the lumens 161, 163 through the tubular elongated member 160 do not contain valves or other components located therein that could affect the flow of fluid through them. Thus, the fluid delivery system 150 described herein has a fluid delivery device having a substantially cylindrical fluid delivery device body that, together with the tubular elongated member, defines a lumen of the system, the lumen itself being configured to mix one or more fluids to deliver fluids (such as viscous fluids) in a spray form, without requiring further devices and / or components. It can be further understood that the various embodiments of the fluid delivery devices 200, 300, and 400 described above do not require rotation or angular alignment or a specific relative rotation or angular orientation with respect to each other, thus facilitating assembly and use. Nevertheless, fluid isolation must be maintained in the respective lumens through which different fluids are delivered to the distal end 150d of the fluid delivery system 150. For example... Figure 5 The diagram schematically shows a cross-section through a tubular elongated member 160 at an unspecified location, with a first lumen 161 and a second lumen 163 fluidly isolated to separate a first fluid 1001 (within the first lumen 161) from a second fluid 1003 (within the second lumen 163). In some aspects, instead of conveying only two fluids, the tubular elongated member 160 can be configured to convey two or more fluids that are fluidly isolated from each other. For example, in Figure 6 In the illustrated embodiment example, partition wall 166 divides the first tubular member 162 into a first half-lumen 161a and a second half-lumen 161b, and divides the second tubular member 164 into a first half-lumen 163a and a second half-lumen 163b, thereby fluidly isolating the fluid in each fluid isolation lumen. It should be understood that this disclosure is not limited to the precise construction of the lumens, and other constructions are within the scope and spirit of this disclosure.

[0058] Back Figure 1As described above, the fluid connector 170 is configured to fluidly connect the fluid delivery system 150 to one or more fluid sources 1000. To maintain separation of the first and second fluids, the first and second fluids are fluidly isolated from each other through a lumen at the distal end 150d of the fluid delivery system 150. According to various principles of this disclosure, the fluid connector 170 is configured to fluidly connect the first lumen of the fluid delivery system 150 (formed by a first lumen fluidly connected within the tubular elongated member 160 and the fluid delivery devices 100, 200, 300, 400) to the first fluid source 1010 in a manner that maintains fluid isolation between the first and second fluids. Furthermore, it is configured to fluidly connect the second lumen of the fluid delivery system 150 (formed by a second lumen fluidly connected within the tubular elongated member 160 and the fluid delivery devices 100, 200, 300, 400) to the second fluid source 1020. Figure 1 In the illustrated embodiment of the fluid connector 170, this fluid isolation is achieved by the fluid connector 170 including a Luer lock 172 having concentric lumens that are fluidly connected to a first lumen 161 and a second lumen 163 of the tubular elongated member 160, respectively, in a manner that fluidly isolates lumens 161 and 163. A Y-connector 180 (which in some respects can be considered part of the fluid connector 170) fluidly connects a separate fluid source to a separate lumen of the Luer lock 172. More specifically, the Y-connector 180 includes a first branch 182 and a second branch 184. Figure 1 As shown, the first branch 182 is fluidly connected between the first fluid source 1002 and the Luer lock 172 and is fluidly connected to both the first fluid source 1002 and the Luer lock 172 (specifically, fluidly connected to the inner lumen of the Luer lock 172, which is not shown but can be readily understood by those skilled in the art by referring to commercially available Luer locks). Also as... Figure 1As shown, the second branch 184 is fluidly connected between and to the second fluid source 1004 and the Luer lock 172 (specifically, fluidly connected to the outer lumen of the Luer lock 172, which is not shown but can be readily understood by those skilled in the art with reference to commercially available Luer locks). In the illustrated embodiment example, the first fluid source 1002 includes a syringe filled with a first fluid (such as a viscous fluid, such as a hemostatic agent), and the second fluid source 1004 includes an inlet tube connected to the fluid source, which can pressurize the second fluid (e.g., an air pump, a miniature compressor for delivering pressurized fluids such as air, a pre-filled CO2 cylinder handle, etc.). In some aspects, the first branch 182 of the Y-connector 180 includes a seal 186, as known to those skilled in the art, to control / prevent any fluid leakage from the first fluid source 1002 into the Y-connector 180, and / or to prevent fluid mixing within the fluid connector 170. In some aspects, the second branch 184 of the Y-connector 180 includes a control valve 188 (optionally together with the second fluid source 1004) to facilitate regulation of the flow of the second fluid from the second fluid source 1004 to the fluid connector 170. Seals (as known to those skilled in the art) may also be provided in the second branch 184 and / or within a Luer lock 172 to prevent the second fluid from mixing with / leaking from the first fluid. As discussed above, the second fluid is pumped into the fluid delivery system 150 to its distal end 150d and exits the fluid delivery system 150 together with the first viscous fluid. The pressurized second fluid expels the more viscous first fluid from the fluid delivery system 150 as a spray 1100.

[0059] The proximal end 150p of the fluid delivery system 150 (e.g., various components including the fluid connector 170) can be configured to be operated by a human operator (e.g., a physician and / or technician and / or an assistant physician) or an automated (e.g., a robot) operating system in a manner known to those skilled in the art. It is understood that the proximal end 150p can be configured as an ergonomic interface with an intuitive user interface that facilitates rapid attachment to an endoscope, thereby minimizing setup time and improving usability compared to prior art systems. For example, the fluid delivery system 150 can be provided pre-assembled and ready for use by medical professionals, requiring no additional activities or steps (other than connecting to a fluid source). Furthermore, the fluid delivery system 150, formed according to various principles of this disclosure, allows the delivery of viscous fluids in a spray form previously unattainable by existing atomizing devices or systems.

[0060] It will be apparent to those skilled in the art that the order of steps of the disclosed apparatus, system, and / or method and / or the method described herein may be varied without departing from the concept, spirit, and scope of this disclosure.

[0061] The foregoing discussion has broad applications and has been presented for illustrative and descriptive purposes, and is not intended to limit this disclosure to the forms disclosed herein. All apparatuses and methods discussed herein are examples of apparatuses and / or methods implemented according to one or more principles of this disclosure. These examples are not the only ways to implement these principles, but are merely examples and are not intended to limit the broader aspects of this disclosure. Therefore, references to elements or structures or features in the drawings should be understood as references to examples of embodiments of this disclosure and should not be construed as limiting this disclosure to the specific elements, structures, or features shown. Other examples of ways of implementing the disclosed principles will be apparent to those skilled in the art after reading this disclosure. It should be understood that various additions, modifications, and substitutions can be made to the embodiments disclosed herein without departing from the concept, spirit, and scope of this disclosure. In particular, it will be apparent to those skilled in the art that the principles of this disclosure may be embodied in other forms, structures, arrangements, proportions, and with other elements, materials, and components without departing from its concept, spirit, scope, or characteristics. For example, various features of this disclosure are combined in one or more aspects, embodiments, or constructions for the purposes of this disclosure. However, it should be understood that various features of certain aspects, embodiments, or constructions may be combined in alternative aspects, embodiments, or constructions. It should be understood that various features described with respect to one embodiment are generally applicable to another embodiment, whether or not explicitly stated. The various features described below may be used alone or in any combination thereof. Therefore, the invention is not limited to the embodiments specifically described herein, and all alternatives and modifications that are obvious to those skilled in the art are considered to be within the spirit, scope, and concept of this disclosure as defined by the appended claims. Although this disclosure is presented in the form of embodiments, it should be understood that not all individual features of the subject matter need to be present in order to achieve at least some of the desired characteristics and / or advantages of the subject matter or such individual features. Those skilled in the art will understand that this disclosure can be used with numerous modifications or variations of structures, arrangements, proportions, materials, components, etc., used in the practice of this disclosure, which are particularly suited to specific environments and operational requirements without departing from the principles or spirit or scope of this disclosure. Therefore, the embodiments currently disclosed should be considered illustrative rather than restrictive in all respects, and the scope of the claimed subject matter is indicated by the appended claims and is not limited to the specific embodiments or arrangements described or shown herein. In view of the foregoing, any individual feature of any embodiment may be used and claimed individually or in combination with features of that embodiment or any other embodiment, the scope of which is indicated by the appended claims and is not limited to the foregoing description.

[0062] In the foregoing description and the following claims, the following should be understood: The phrases “at least one,” “one or more,” and “and / or” as used herein are open-ended expressions, operationally both connective and disjoint. The terms “a,” “an,” “the,” “first,” “second,” etc., do not exclude multiple entities. For example, the entity referred to herein as “a” or “an” means one or more of that entity. Therefore, the terms “a” (or “an”), “one or more,” and “at least one” are interchangeable herein. As used herein, the term “or” is generally used in its meaning including “and / or” unless the context expressly specifies otherwise. As used herein, the conjunction “and” includes each of such combined structures, components, features, etc., unless the context expressly specifies otherwise, and the conjunction “or” includes one or more (alone and in any combination and number) of such combined structures, components, features, etc., unless the context expressly specifies otherwise. All directional references (e.g., proximal, distal, up, down, upward, downward, left, right, lateral, longitudinal, front, back, top, bottom, above, below, vertical, horizontal, radial, axial, clockwise, counterclockwise, etc.) are used solely for identification purposes to aid the reader's understanding of this disclosure, and / or to distinguish areas of related elements from one another, and do not limit the related elements, particularly regarding their location, orientation, or use in this disclosure. Connection references (e.g., attachment, joint, connection, engagement, combination, etc.) should be interpreted broadly and may include intermediate members between sets of elements and relative movement between elements, unless otherwise stated. Therefore, a connection reference does not necessarily imply that two elements are directly connected and in a fixed relationship with each other. Identification references (e.g., primary, secondary, first, second, third, fourth, etc.) are not intended to suggest importance or priority, but are used to distinguish one feature from another.

[0063] The following claims are hereby incorporated by reference in this detailed description, each claim being an independent embodiment of this disclosure. In the claims, the terms "comprising" or "including" do not exclude the presence of other elements, components, features, groups, regions, integers, steps, operations, etc. Furthermore, while individual features may be included in different claims, they may be advantageously combined, and inclusion in different claims does not imply that the combination of features is not feasible and / or disadvantageous. Moreover, singular references do not exclude plural. Reference numerals in the claims are provided as clarifying examples only and should not be construed as limiting the scope of the claims in any way.

Claims

1. A fluid conveying device, comprising: Proximal end; remote; A first lumen defined by the fluid delivery device for delivering a first fluid to a distal end of the fluid delivery device; as well as A second lumen is defined through the fluid delivery device to deliver a second fluid to a distal end of the fluid delivery device; in: The first and second lumens terminate and open at the distal delivery end of the fluid delivery device to deliver the first and second fluids to the distal delivery end and to mix the first and second fluids for delivery in the form of a spray.

2. The fluid conveying device according to claim 1, wherein: The first lumen and the second lumen are arranged concentrically relative to each other; and The proximal end is configured to be fluidly connected to a tubular elongated member defining a first lumen concentrically positioned within a second lumen, the first lumen of the fluid delivery device being configured and positioned to be fluidly connected to the first lumen of the tubular elongated member, and the second lumen of the fluid delivery device being configured and positioned to be fluidly connected to the second lumen of the tubular elongated member.

3. The fluid delivery device according to any one of claims 1-2, wherein the fluid delivery device comprises an internal fluid delivery device body defining a first lumen extending longitudinally therethrough and having an outer surface having one or more grooves defining the second lumen.

4. The fluid delivery device of claim 3, wherein the distal delivery end of the fluid delivery device defines one or more channels therethrough, and the one or more grooves defining the second lumen are fluidly connected to a corresponding channel in the one or more channels to define the second lumen.

5. The fluid delivery device of claim 4, wherein the one or more channels terminate and open at a distal end of the distal delivery end that tapers proximally to the distal end, so as to direct the second fluid toward the first fluid as the first fluid leaves the first lumen, thereby delivering the first fluid and the second fluid in a spray form.

6. The fluid delivery device according to any one of claims 3-5, further comprising an external fluid delivery device body defining an interior, wherein the internal fluid delivery device body is positioned within the interior of the external fluid delivery device body, the interior of the external fluid delivery device body and the one or more grooves in the outer surface of the internal fluid delivery device body defining the second lumen.

7. The fluid delivery device according to claim 6, wherein the internal fluid delivery device body and the external fluid delivery device body are movable relative to each other to regulate the flow of fluid through the distal delivery end of the fluid delivery device.

8. The fluid delivery device of claim 7, wherein the internal fluid delivery device body has a distal end having a slit defined therethrough, and the spacing between the slits is adjustable by moving the distal end of the internal fluid delivery device body relative to and contacting the distal end of the interior of the external fluid delivery device body to adjust the fluid delivered in the form of a spray.

9. The fluid delivery device according to any one of claims 1-8, wherein the proximal end is configured to be fluidly connected to a first lumen of the tubular elongated member, the first lumen of the tubular elongated member being configured to deliver the first fluid to the first lumen, and the second lumen of the fluid delivery device is configured to be fluidly connected to a second lumen of the tubular elongated member, the second lumen of the tubular elongated member being fluidly isolated from the first lumen of the tubular elongated member and configured to deliver the second fluid to the second lumen.

10. A fluid transport system, comprising: A fluid transport device, comprising: Proximal end; remote; A first lumen defined through the fluid delivery device to deliver a first fluid to the distal end of the fluid delivery device; and A second lumen, defined through the fluid delivery device to deliver a second fluid to the distal end of the fluid delivery device; and A tubular elongated member, wherein the tubular elongated member defines: A first lumen having a distal end fluidly connected to the first lumen of the fluid delivery device, and a proximal end fluidly connected to a first fluid source; and The second lumen has a distal end that is fluidly connected to the second lumen of the fluid delivery device, and a proximal end that is fluidly connected to a second fluid source. in: The first lumen of the fluid transport device and the first lumen of the tubular elongated member define the first lumen of the fluid transport system; The second lumen of the fluid delivery device and the second lumen of the tubular elongated member define a second lumen of the fluid delivery system, the second lumen of the fluid delivery system being fluidly isolated from the first lumen of the fluid delivery system; and The first and second cavities of the fluid delivery system terminate and open at the distal delivery end of the fluid delivery device to deliver the first and second fluids to the distal delivery end and to mix the first and second fluids for delivery in the form of a spray.

11. The fluid delivery system of claim 10, wherein the first lumen and the second lumen of the fluid delivery system are substantially continuous lumens defined by channel walls defined in the fluid delivery device and the tubular elongated member, and are not interrupted by any separate component located therein.

12. The fluid delivery system according to any one of claims 10-11, wherein the first lumen of the tubular elongated member is fluidly connected to a fluid source for a viscous first fluid, and the second lumen of the tubular elongated member is fluidly connected to a fluid source for pressurizing a second fluid.

13. The fluid delivery system of claim 12, wherein the distal delivery end of the fluid delivery device tapers inward toward the proximal side to guide pressurized second fluid leaving the second lumen of the fluid delivery system toward viscous first fluid leaving the first lumen of the fluid delivery system, thereby delivering the viscous first fluid in the form of a spray.

14. The fluid transport system according to any one of claims 11-13, wherein: The fluid delivery device includes an internal fluid delivery device body defining a first lumen extending longitudinally through the fluid delivery device body and having an outer surface having one or more grooves defining a second lumen of the fluid delivery device body. and The second cavity of the tubular elongated member fits onto the exterior of the fluid delivery device body to form the second cavity of the fluid delivery device body together with the one or more grooves.

15. The fluid transport system according to any one of claims 11-14, wherein: The fluid delivery device includes an outer fluid delivery device body defining an interior therein, and an inner fluid delivery device body positioned within the interior of the outer fluid delivery device body; and The external fluid delivery device body and the internal fluid delivery device body are movable relative to each other to adjust the spray pattern of the fluid exiting from them.

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