WIRELESS DEVICES, SYSTEMS AND METHODS FOR ENDOSCOPIC POSITIONING - Patent application

Abstract

A locator system deployable at a target site in a first anatomical structure and identifiable from within a second anatomical structure. The locator system includes a signal generator and a tissue engaging member. The tissue engaging member engages tissue at the target site such that a delivery system can deliver the locator system and be withdrawn with the tissue engaging member engaged to tissue at the target site without disturbing the position of the locator system. The locator system can be deployed at a target site in a patient's intestine and identified from within the patient's stomach and create an anastomosis between the stomach and the target site.

Description

[Technical field]

[0001] The present disclosure relates generally to the field of medical devices for use within the body. In particular, the present disclosure relates to medical devices, systems, and methods for use in endoscopic procedures. More particularly, the present disclosure relates to medical devices, systems, and methods that facilitate positioning of devices within the body, such as facilitating identification of the location of a target site within the body. [Background technology]

[0002] It may be difficult to view, locate, and manipulate anatomical structures, devices, and / or anatomical structures that include one or more devices from within the body. During an internal procedure, such as an endoscopic procedure (not cutting the body) within a body lumen, a medical professional may need to identify a particular anatomical structure of the body and its location within the body from the outside. It may be difficult to identify a desired anatomical structure of the body and / or its location within the body due to lack or low amount of illumination and / or intervening anatomical structures and / or the shape and / or structure of various parts of the body. For example, a procedure within a body lumen, such as the intestine, may present long anatomical regions that are difficult to distinguish from the outside of the body. Various localization devices may be provided within the body. However, manipulating the device within the body with respect to such localization devices (e.g., performing a procedure while manipulating the device and / or withdrawing a delivery device of the localization device) may cause such localization devices to become dislodged, thereby hindering the purpose and function of such localization devices.

[0003] With respect to these and other considerations, the improvements of the present application may be useful. Summary of the Invention

[0004] This summary of the disclosure is provided to aid in understanding, as those skilled in the art will appreciate that each of the various aspects and features of the disclosure can in some cases be used to advantage separately or in other cases can be used in combination with other aspects and features of the disclosure. The inclusion or exclusion of elements, components, etc. in this summary is not intended to limit the scope of the claimed subject matter.

[0005] In accordance with various principles of the present disclosure, a locator system includes a flexible elongate member, a beacon attached to the flexible elongate member, and a tissue engagement member configured to engage tissue at the target site to secure the locator system relative to the target site.

[0006] In some embodiments, the tissue engaging member is expandable to engage tissue at a target site to secure the locator system relative to a target site. In some embodiments, the tissue engaging member is an inflatable balloon. In some embodiments, the tissue engaging member is an expandable stent. In some embodiments, the tissue engaging member is mounted on the flexible elongate member.

[0007] In some embodiments, the tissue engaging member comprises a pair of gripping arms configured to grasp tissue at a target site therebetween. In some embodiments, the locator system further includes a controller extending along the flexible elongate member and operable to shift the tissue engaging member between a delivery configuration and a tissue engaging configuration. In some embodiments, the tissue engaging member is expandable and the controller is an inflation lumen through the flexible elongate member. In some embodiments, the tissue engaging member is expandable and the controller is an inflation lumen in an inflation line extending along the flexible elongate member. In some embodiments, the controller is a sheath extending around the flexible elongate member and the tissue engaging member is an expandable stent disposed within the controller in the delivery configuration and expandable to a tissue engaging configuration when outside of the controller. In some embodiments, the tissue engaging member has a pair of gripping arms configured to grip tissue at a target site between them.

[0008] In accordance with various principles of the present disclosure, a locator system includes a beacon, a tissue engaging member, and a controller operable to shift the tissue engaging member between a delivery configuration in which the tissue engaging member is compact and deliverable transluminally to a target site, and a tissue engaging configuration in which the tissue engaging member engages tissue at the target site, thereby securing the beacon relative to the target site.

[0009] In some embodiments, the locator system includes a flexible elongate member to which the beacon and the tissue engaging member are attached. In some embodiments, the tissue engaging member is an inflatable balloon and the controller is an inflation lumen in communication with the balloon.

[0010] In some embodiments, the controller is a sheath and the tissue engaging member is an expandable stent that is shiftable between a delivery configuration when within the sheath and an expanded tissue engaging configuration when outside the sheath.

[0011] In some embodiments, the tissue engaging member includes a pair of jaws movable by the controller between a closed configuration in which the jaws are in a delivery configuration or gripping tissue between the jaws, and an open configuration in which the jaws can engage tissue between the jaws.

[0012] In accordance with various principles of the present disclosure, a method for locating a target site in a first anatomical structure from within a second anatomical structure includes delivering a locator system to the target site using a delivery system, fixing the locator system relative to the target site by engaging a tissue engaging member of the locator system with tissue at the target site, withdrawing the delivery system from the locator system such that the locator system remains fixed in place relative to the target site, and locating and identifying the location of the locator system from the second anatomical structure through at least a wall of the second anatomical structure.

[0013] In some embodiments, the method includes forming an anastomosis between a first anatomical structure and a second anatomical structure along the target site. In some embodiments, the method includes securing the locator system relative to the target site by expanding the tissue engaging member from a compact delivery configuration to an expanded configuration to engage tissue at the target site.

[0014] In some embodiments, the method includes securing the locator system to the target site by grasping tissue at the target site between grasping arms of the tissue engaging members.

[0015] These and other features and advantages of the present disclosure will become readily apparent from the following detailed description. The scope of the present invention is set forth in the appended claims. Although the following disclosure is presented in terms of aspects or embodiments, it should be understood that each aspect can be claimed separately or in combination with aspects and features of that embodiment or other embodiments. [Brief description of the drawings]

[0016] Non-limiting embodiments of the present disclosure are described by way of example with reference to the accompanying drawings, which are schematic and are not intended to be drawn to scale. The accompanying drawings are provided for illustrative purposes only, and the dimensions, positions, order, and relative sizes reflected in the figures in the drawings may vary. For example, the devices may be enlarged so that details can be discerned, but are intended to be reduced in size to fit within, for example, a working channel of a delivery catheter or endoscope. In the drawings, identical or nearly identical or equivalent elements are typically represented by the same reference numerals, and similar elements are typically designated by similar reference numerals differing by 100, and duplicate descriptions are omitted. For purposes of clarity and conciseness, not every element is labeled in every drawing, nor every element of each embodiment is shown unless illustration is necessary for a person skilled in the art to understand the disclosure.

[0017] The detailed description can be better understood in conjunction with the accompanying drawings, in which like reference characters represent like elements, as follows: [Figure 1] 1 shows a perspective view of an embodiment of an implantable locator system formed in accordance with various aspects of the present disclosure and disposed in a schematic diagram of a gastrointestinal environment. [Diagram 2] 1, but with the colon shown in phantom, showing an example of an embodiment of a locator system deployed at a target site and a delivery system for delivering an instrument to reach the target site. [Diagram 3] 3 shows a view similar to FIG. 2, illustrating the device shown in FIG. 2 having been delivered to reach the target site. [Figure 4] FIG. 4 is a separate view of the retracted portions of the stomach and jejunum shown in FIG. 3, together with the anastomosis therebetween. [Diagram 5] FIG. 5 is a view similar to FIG. 4, but showing the tissue approximator holding the gastric and jejunal tissue walls in apposition. [Figure 6]1 illustrates a perspective view of an example embodiment of a locator system formed in accordance with various principles of the present disclosure; [Figure 7] 1 illustrates a perspective view of an example embodiment of a locator system formed in accordance with various principles of the present disclosure being delivered to a target site. [Figure 8] FIG. 8 shows a perspective view of an example of an embodiment of a locator system as in FIG. 7 in a deployed position. [Figure 9] 1 illustrates a perspective view of an example embodiment of a locator system formed in accordance with various principles of the present disclosure being delivered to a target site. [Figure 10] FIG. 10 shows a perspective view of an example of an embodiment of a locator system as in FIG. 9 in a deployed position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Detailed Description The following detailed description should be read with reference to the drawings illustrating exemplary embodiments. It should be understood that the disclosure is not limited to the specific embodiments described, as such may vary. All devices, systems, and methods described herein are examples of devices and / or systems and / or methods implemented according to one or more principles of the disclosure. Each example of an embodiment is provided for illustrative purposes, and is merely an example, not the only way to implement these principles. Thus, references to elements, structures, or features in the drawings should be understood as references to example embodiments of the disclosure, and should not be understood as limiting the disclosure to the specific elements, structures, or features illustrated. Other examples of ways to implement the disclosed principles will occur to those of skill in the art upon reading this disclosure. Indeed, it will be apparent to those of skill in the art that various modifications and changes can be made in the present disclosure without departing from the scope or spirit of the inventive subject matter. For example, features illustrated or described as part of one embodiment can be used in combination with another embodiment to yield yet another embodiment. It is therefore intended that the inventive subject matter encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.

[0019] It will be understood that the present disclosure is described in this application with various levels of detail. In some cases, details that are not necessary for a person skilled in the art to understand the present disclosure or that make it difficult for the person skilled in the art to appreciate other details may be omitted. The terms used in this specification are only for the purpose of describing certain embodiments and are not intended to be limiting beyond the scope of the appended claims. Unless otherwise defined, technical terms used in this specification shall be understood as commonly understood by those skilled in the art to which the present disclosure belongs. All of the devices and / or methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure.

[0020] As used herein, "proximal" refers to a direction or location closest to a user (e.g., a medical professional, clinician, technician, operator, physician, etc., these terms are used interchangeably herein without limitation and include automated control systems, etc.) and / or closest to a delivery device when the device is in use (e.g., when the device is introduced into a patient or during implantation, placement, or delivery), and "distal" refers to a direction or location furthest from a user and / or closest to a delivery device when the device is in use (e.g., when the device is introduced into a patient or during implantation, placement, or delivery). "Longitudinal" means extending along the longer or larger dimension of an element. "Center" means at least approximately bisecting a center point and / or approximately equidistant from a perimeter or boundary, and "central axis" means, with respect to an opening, a line extending longitudinally along the length of the opening and at least approximately bisecting a center point of the opening when the opening comprises, for example, a tubular element, strut, channel, cavity, or hole.

[0021] Many medical procedures require locating an anatomical structure, such as an organ or tissue wall, and then delivering a medical instrument to that location to perform the procedure at the identified location (e.g., "target site" or "target tissue" or "target tissue site"). The present disclosure is applicable to any such location, and reference to any such designation is applicable to other designations without limitation, unless otherwise specified. It may be desirable to be able to locate the identified location at a later time (e.g., after the delivery system of the locator system is removed), such as when performing a procedure after identifying the anatomical location, and / or from another location within the body. Non-limiting examples of procedures that may be performed include various medical procedures that involve moving a tissue wall (e.g., a wall of a body lumen or an organ) to a desired location, for example, relative to another tissue wall (e.g., a wall of a body lumen or an organ). For example, various procedures can be performed by entering the gastrointestinal tract (GI tract) through a first organ or structure (such as the esophagus, stomach, duodenum, small intestine, large intestine, or abdominal cavity) and delivering an anchor or stent to an adjacent organ or lumen or tissue structure (such as an adjacent portion of the GI tract, bile duct, pancreatic duct, gallbladder, pancreas, cyst, pseudocyst, abscess, etc.). Typically, it is necessary to penetrate both an access tissue wall (e.g., a wall of an organ or a first body lumen) to establish access and a second tissue wall (e.g., a wall of an organ or a second body lumen) along or adjacent to or at the target of the procedure. Stents or other tissue anchors may be deployed between adjacent body lumens, organs, or other structures, such as to maintain tissue walls in apposition and / or to create an anastomosis, as indicated by the procedure. Tissue anchors, in addition to stents, may be used to secure adjacent tissue or organs, such as before the stent is deployed, and may be left in place after the stent is deployed.

[0022] Endoscopic procedures have been used to create connections, such as anastomoses, between the stomach and certain parts of the intestine through gastrointestinal anastomosis. For example, bypassing a portion of the duodenum, such as by creating an anastomosis between the stomach and small intestine (with the distal duodenum or jejunum) about 150 cm or more from the pylorus, may improve disease symptoms. In cases of gastric outlet obstruction, gastrojejunostomy is performed with the goal of draining stomach contents into the jejunum below / distal to the obstructed / failed duodenum. Gastrojejunostomy may be a minimally invasive and potentially reversible treatment option for patients with metabolic disease by creating an anastomosis between the stomach and jejunum to bypass the duodenum and provide the desired metabolic effect. In this manner, absorption of stomach contents (e.g., food and other nutrients) at the duodenum may be avoided and nutrients from such contents may not be absorbed or may be taken in or absorbed slowly as such contents pass from the stomach through the small intestine, which may promote weight loss in the patient and potentially control or reverse type 2 diabetes.

[0023] Gastrointestinal anastomosis and other procedures within the body may be performed by either endoscopic (gastroscopic or laparoscopic) or open surgical procedures. Endoscopic procedures such as gastrointestinal anastomosis present various challenges, including the need to endoscopically identify a desired location (sometimes referred to herein as a "target site" or "target tissue site"), such as in the intestine, through the gastric cavity. Ultrasound and / or fluoroscopy provide images through anatomical walls (e.g., the stomach and intestinal walls). However, while ultrasound is useful for imaging tissues, inorganic materials used to identify tissues may not be easily imaged by ultrasound. Fluoroscopy is well suited to viewing dense materials, such as those from which medical instruments are made, but contrast agents used in fluoroscopy may dissipate during the location of the target tissue, and may therefore require reinjection. It will be understood that terms such as instruments, tools, devices, and the like may be used interchangeably herein without any limiting intent.

[0024] Another solution includes multiple devices that operate as follows: First, a beacon system with a light on the distal end of a flexible elongated member (such as a guidewire or tubular element) is inserted, such as with an endoscope, into the desired location of the procedure (e.g., where a connection between the intestine and the stomach is to be created). The endoscope is withdrawn, leaving the light in place. The endoscope is then reinserted into the body (e.g., parallel to the flexible elongated member with the light on its distal end) and one or more instruments are inserted to perform the procedure, such as to incise the stomach wall or peritoneum. The light can be visualized or otherwise located to identify the target site of the procedure, so that the procedure can be performed at the desired target site. For example, once inside the peritoneum, the physician locates the desired portion of the small intestine with the help of a light in the small intestine that is visible from the outside of the intestinal wall. The outside of the small intestine is grasped and merged with the stomach. A stent is then deployed to connect the small intestine to the stomach, thus forming an anastomosis.

[0025] The above-mentioned solutions using a light to identify the target site for the procedure also have some challenges. For example, in the initial stages of the procedure, after the guidewire has been placed at the desired location, the endoscope must be withdrawn from the body while maintaining the position of the light in the body at the desired location. In order to maintain the light in its original desired location, the withdrawal of the endoscope must be coordinated with the advancement of the flexible elongate member in which the light is located. Such procedures can be difficult to perform precisely and tend to affect the final location of the light and therefore the location of one or more instruments to perform the procedure (e.g., the portion of the small intestine where the anastomosis with the stomach is formed), which is a critical factor for the success of the procedure.

[0026] The present disclosure relates to devices, systems, and methods useful for performing procedures, such as endoscopic, laparoscopic, and / or open surgery, within the body by first identifying a target site for the procedure with a locator system, deploying the locator system at the target site, and then locating the locator system and performing the procedure at the intended target site identified by the locator system. In some aspects, the devices, systems, and methods may be used to create an anastomosis, such as a gastrojejunostomy. For example, the devices and systems described herein may assist in the placement of a gastrojejunostomy by reliably and repeatedly identifying a desired location within a patient's gastrointestinal system, for example, by identifying a location within the jejunum, such as proximal or distal or adjacent to the ligament of Treitz. Additionally, the devices and systems described herein may enable a medical professional to locate, grasp, hold, and / or cut a portion of the stomach and small intestine during a gastrojejunostomy procedure. Optionally, a stent or other conduit may be placed in the bypass bridging the stomach and jejunum walls where an opening has been created. The stent or conduit may help establish the anastomosis or keep it open until the anastomosis has stabilized. The stent may or may not be removed thereafter.

[0027] It will be appreciated that various principles of the present disclosure may be applied to devices, systems, and methods for performing other procedures within a patient's body using the locator systems and locator system delivery and deployment systems disclosed herein. Thus, while the systems, devices, and methods described herein are described with respect to the gastrointestinal system, it may be appreciated that the devices, systems, and methods according to the present disclosure may be advantageous for use in any other procedures, such as, but not limited to, those involving grasping, manipulation, or cutting of tissue (e.g., body lumens and / or other sensitive tissue structures). Additionally, it should be appreciated that the systems, devices, and methods described herein may be used in other areas of the anatomy, such as where the selective location of tissue passes through other tissue barriers and / or is not visible.

[0028] In accordance with various principles of the present disclosure, a locator system is delivered to a target site by a delivery system and secured to a target tissue at the target site (e.g., to be located from another area of ​​the body). Such engagement of the locator system with tissue eliminates the need for coordination between removal of the delivery system and maintaining the locator device at a desired location at the target site, as the locator system is secured relative to the target site. It will be understood that terms such as couple, engage, grab, hold, fasten, clamp, secure, attach, maintain, anchor, and the like (and other grammatical forms thereof) may be used interchangeably herein without any limitation. Additionally, it will be understood that terms such as locator, beacon, guide, signal, emitter, light, and the like may be referred to interchangeably herein without any limitation.

[0029] In some embodiments, the locator system includes a tissue engaging member configured to secure the locator system to tissue at the target site. It will be understood that the tissue engaging member may also be referred to herein as, but is not limited to, a tissue fastener or clip, or other mechanical fixation device (e.g., hemostatic clip, clamp, grasper, basket, gripper, magnet, adhesive, etc.). The tissue engaging member may be shiftable between a delivery configuration (e.g., a compact configuration that facilitates delivery of the locator system to the target site) and a tissue engaging configuration (e.g., engaging tissue to secure the locator system relative to the engaged tissue). An actuator may be provided for shifting the tissue engaging member between the delivery configuration and the tissue engaging configuration. Furthermore, it will be understood that the tissue engaged by the tissue engaging member at the target site may be at the location where a procedure such as an anastomosis is to be performed, or distal or proximal to such a procedure, depending on the procedure to be performed and the technique used and the medical professional's specifications.

[0030] Various embodiments of devices, systems, and methods for identifying positions within the body are described below with reference to examples shown in the accompanying drawings. References herein to "one embodiment," "one embodiment," "some embodiments," "other embodiments," and the like indicate that one or more particular features, structures, concepts, and / or characteristics in accordance with the principles of the present disclosure may be included in connection with that embodiment. However, such references do not necessarily mean that all embodiments include that particular 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 of such features, structures, concepts, and / or characteristics in various combinations. 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 of the other embodiments provided herein. That is, any of the features, structures, concepts, and / or characteristics described herein may be combined to create hybrid embodiments, and such hybrid embodiments are within the scope of the present disclosure. Furthermore, references in various places herein to "one embodiment," "one embodiment," "some embodiments," "other embodiments," and the like are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments necessarily mutually exclusive of other embodiments. Furthermore, it should be understood that various features, structures, concepts, and / or properties of the disclosed embodiments are independent and separate from one another and may be used or presented individually or in various combinations with one another to create alternative embodiments, which are also considered to be part of this disclosure. Thus, since it would be too cumbersome to describe all of the many possible combinations and subcombinations of features, structures, concepts, and / or properties, the disclosure is not limited to only the embodiments specifically described herein, and the example embodiments disclosed herein are not intended to limit the broader aspects of the disclosure. The following description is merely an illustrative example of an embodiment, and is not intended to limit the broader aspects of the disclosure.

[0031] In the drawings, it will be understood that common features are identified by common reference elements, and for brevity and convenience, and without intent of limitation, descriptions of common features will not usually be repeated. For clarity, not all components having the same reference number are numbered. Furthermore, groups of similar elements may be indicated by numbers and letters, and may generally refer to one element or such elements, or such elements as a group, by the numbers alone (without including the letters associated with each similar element). In the following description, it will be understood that similar elements or components among various illustrated embodiments having reference numbers less than 1000 will usually be designated by the same reference number plus a multiple of 1000, and duplicate descriptions will usually be omitted for brevity. Furthermore, certain features of an embodiment may be used across different embodiments and will not necessarily be individually labeled when appearing in different embodiments.

[0032] Referring now to the drawings, an example embodiment of a locator system 100 and a delivery system 1000 configured to deliver the locator system 100 to a target site TS is shown in the schematic diagram of the gastrointestinal system in FIG. 1. It will be understood that the principles of the present disclosure are applicable to other anatomical sites and structures, but for convenience and without any intent of limitation, reference will be made to gastrointestinal locations and structures. It will further be understood that the tissue engaged by the tissue engaging member at the target site may be at the location where a procedure such as an anastomosis is performed, or distal or proximal to such a procedure, depending on the procedure to be performed and the technique used and the medical professional's designation. It will further be understood that the term "at" is intended to include near (e.g., along, adjacent to, etc.) unless otherwise indicated. In the illustrated example environment, the locator delivery system 1000 is inserted into the stomach S via a natural orifice transluminal endoscopic surgery (NOTES) procedure (e.g., nose or mouth to esophagus), past the pylorus P, and into the duodenum D. In the example embodiment shown in Figure 1, the locator delivery system 1000 includes a flexible elongate delivery member 1110 that can be delivered through the body to the target site TS. The flexible elongate delivery member 1110 can be delivered through a lumen in a flexible elongate tubular member (e.g., shaft, catheter, endoscope, etc.) known to those skilled in the art for transluminal delivery of devices through the body (as opposed to by open surgical techniques). In some embodiments, the flexible elongate delivery member 1110 is delivered via an endoscope (not shown, but can be any of a variety of endoscopes known to those skilled in the art) with visualization and / or imaging capabilities to easily locate the target site TS.

[0033] The locator system 100 is advanced by the locator delivery system 1000 to a desired target site TS of the locator system 100. The locator delivery system 1000 and the locator system 100 can be advanced using a control handle at the proximal end of the locator delivery system 1000 (not shown, but this can be any suitable control handle known to one of skill in the art, the details of which are not limiting or critical to this disclosure). Peristaltic movements through the GI system can also aid in the advancement of the locator delivery system 1000 and the locator system 100. In the example environment shown in FIG. 1, the target site TS is in the jejunum J, e.g., adjacent, proximal, or distal to the ligament of Treitz LT. A portion of the jejunum J can be selected (e.g., as determined by a medical professional) as the "target site TS" that is a distance from the pylorus P where an anastomosis between the jejunum J and the stomach S is to be formed. The locator delivery system 1000 can aid in the identification and selection of the target site TS, such as through the use of optical / visualization elements known to those skilled in the art (e.g., cameras, scopes, fiber optics, fluoroscopy, etc., the details of which are not limiting or critical to this disclosure). The locator system 100 is advanced to the target site TS by the locator delivery system 1000. A beacon 110 on the locator system 100 is used to identify the target site TS, which can then be located by an instrument in another anatomical location, such as within the stomach S, as described in more detail below. The beacon 110 can be any of a variety of devices that emit a signal that can be located through an anatomical structure. In some embodiments, the beacon 110 includes one or more light emitting diodes (LEDs).

[0034] In accordance with various principles of the present disclosure, once the locator system 100 reaches the target site TS, the locator system 100 is deployed by engaging tissue engagement members 120 (described in more detail below) of the locator system 100 with tissue at the target site TS. In this manner, the locator system 100 is secured relative to the target site TS, and the locator delivery system 1000 can be withdrawn from the locator system 100 without affecting the position of the locator system 100. An instrument for forming an anastomosis between the target site TS and a portion of the stomach S (preferably near the target site TS in the jejunum J) is then inserted into the body to form an anastomosis between the target site TS and the stomach S.

[0035] To form an anastomosis between the jejunum J and the stomach S, a delivery system 2000 as shown in FIG. 2 can be inserted into the GI system, such as through a NOTES procedure, and further into the stomach S. It will be appreciated that the delivery system 2000 used to form the anastomosis can include common delivery components similar to those in the locator delivery system 1000. For example, an endoscope can be used in the delivery system 2000 as well as the locator delivery system 1000. The delivery system 2000 includes a visualization system that can visualize the beacon 110 of the locator system 100 to identify the location of the target site TS. For example, the delivery system 2000 can include an endoscope with a camera or other visualization system known or previously known to those skilled in the art, the details of which are not limiting or critical to the principles of the present disclosure. Once the location of the target site TS is identified, various instruments, tools, devices, etc. (these terms are used interchangeably herein without any intention of limitation) are delivered by the delivery system 2000 to form an anastomosis between the target site TS and an appropriate location along the stomach S.

[0036] 2, a cutting tool 2010 is delivered by delivery system 2000 to create an opening (guided by beacon 110) through the wall of stomach S in the region of target site TS. As used herein, the term "cutting" should be understood in the broad sense of creating an opening, and a "cutting tool" should be understood as any tool known to those skilled in the art capable of creating an opening in tissue, such as a blade, a cauterizing tool (e.g., with a cauterizing blade), a needle, scissors, an ablation device, other energy delivery device, etc., and it will be understood that the present disclosure is not specifically limited to cutting in the narrow sense of that term. A grasping tool 2020 (any grasper known to one of skill in the art to be capable of grasping tissue, such as an end effector, clip, snare, etc.) is delivered by the delivery system 2000 (e.g., through the working channel through which the cutting tool 2010 was delivered, and after withdrawal of the cutting tool 2010, or through another working channel of the delivery system 2000, or as part of the cutting tool 2010, or otherwise) and extended through the hole in the stomach S cut by the cutting tool 2010, as shown in FIG. 3. The grasping tool 2020 is extended towards the jejunum J, grasping a portion of the jejunum J that includes the target site TS (as identified by the locator system 100), and drawing that portion of the jejunum J towards the stomach S. The jejunum J is held in place relative to the stomach S, and an anastomosis may be formed therebetween in any desired manner known or heretofore known to one of skill in the art.

[0037] For example, in some embodiments, an anastomosis system 2030 can be delivered to proximal portions of the jejunum J and stomach S to form an anastomosis therebetween. As shown in FIG. 4, in some embodiments, the anastomosis system 2030 can deliver a stent 2032 configured to hold the proximal portions of the jejunum J and stomach S together (e.g., using a retaining member 2034 in the jejunum J and a retaining member 2036 in the stomach S) and form an anastomosis therebetween (e.g., via a lumen 2035 through the stent 2032). In some embodiments, as shown in FIG. 5, the jejunum J and stomach S are held in close contact by a tissue approximator 2040, and the stent 2032 is deployed through such tissue walls to form an anastomosis (as described above with respect to the example embodiment shown in FIG. 4). In some embodiments, the tissue approximator 2040 is configured to extend through the proximal tissue walls and hold the tissue walls in apposition, such as by an expanded tissue fixation end 2044 in the jejunum J and an expanded tissue fixation end 2046 in the stomach S. A stent 2032 (as described above with respect to the example embodiment shown in FIG. 4) may be deployed adjacent to the tissue approximator 2040 to form an anastomosis as in the example embodiment shown in FIG. 5. The example embodiment of the tissue approximator 2040 shown in FIG. 4 may be delivered by a delivery system 2000 and / or anastomosis system 2030 (which may share certain features and / or structures). In some embodiments, the tissue approximator 2040 is deployed through an opening created by a cutting tool 2010. In such a case, the anastomosis system 2030 may include a cutting tool for creating an opening in the adjacent walls of the jejunum J and stomach S adjacent to the tissue approximator 2040, and a deployment device for deploying the stent 2032 therethrough. It will be understood that once the anastomosis between the jejunum J and stomach S is formed, the locator system 100 may be removed and is therefore optionally absent as shown in FIGS. 4 and 5.

[0038] Example embodiments of locator systems 200, 300 constructed in accordance with various principles of the present disclosure and used as described above are shown in further detail in FIGS. 6, 7, 8, 9, and 10.

[0039] In the example embodiment of the locator system 200 shown in FIG. 6, the beacon 210 is adjacent the distal end 201 of the locator system 200, distal to the tissue engaging member 220. The beacon 210 and tissue engaging member 220 are shown attached to a flexible elongate member 230, e.g., along its distal end 231. The tissue engaging member 220 is proximal to the beacon 210 (attached adjacent the distal end 231 of the flexible elongate member 230), although the reverse configuration is within the scope and spirit of the present disclosure. The flexible elongate member 230 may be a guidewire or other element known to those skilled in the art to be transluminally movable through the body (e.g., the GI system) to the target site TS, e.g., to deliver the beacon 210 to the target site TS (e.g., via a working channel or lumen in the delivery system 1000). The tissue engaging member 220 is in the form of an expandable element. For example, in the example embodiment shown in Figure 6, tissue engaging member 220 is an expandable balloon. However, other forms of expandable members expandable to contact a tissue wall adjacent to target site TS (e.g., expandable to contact the interior of a portion of jejunum J adjacent to target site TS) to secure locator system 200 relative to target site TS are within the scope and spirit of the present disclosure. Once tissue engaging member 220 expands to contact a tissue wall of target site TS (e.g., the interior of jejunum J), delivery system 1000 can be withdrawn from target site TS without disturbing the location where tissue engaging member 220 secures beacon 210, thereby identifying the location of beacon 210 for further treatment.

[0040] As shown in Figure 6, the tissue engaging member 220 in the form of an expandable balloon may be formed from conformable or non-conformable biocompatible materials such as polymeric materials such as, but not limited to, polyethylene terephthalate (PET), polyamides (such as nylon, polyamide homopolymers, polyamide copolymers, poly(ether-co-amide) copolymers), silicones, polyurethanes, polyarylene sulfides, polyurethane block copolymers, block copolymer thermoplastic elastomers, polyether-block-amide copolymers, polyester-block-ether copolymers, and combinations and / or copolymers thereof. The tissue engaging member 220 may be shifted between a delivery configuration in a compact configuration that facilitates transluminal delivery and an expanded tissue engaging configuration. The locator system 200 includes an inflation lumen that controls the shifting of the tissue engaging member 220 between the delivery configuration and the tissue engaging configuration. In some embodiments, the flexible elongate member 230 has an inflation lumen extending therethrough through which an inflation medium (e.g., a fluid such as air or saline) can be directed to inflate the tissue engaging member 220 in the form of an inflatable balloon. Alternatively, a separate inflation line 240 can be provided, such as alongside the flexible elongate member 220, with an inflation lumen defined therethrough. An air pump 250 for supplying inflation medium to the tissue engaging member 220 and a deflation valve 260 for releasing the inflation medium to deflate the tissue engaging member 220 (e.g., for removing the tissue engaging member 220 from the target site TS upon completion of the procedure performed on the target site TS) can be fluidly coupled to the tissue engaging member 220 via the inflation line 240 or via the inflation lumen in the flexible elongate member 230, as shown generally in FIG. 6.

[0041] Instead of an inflatable expandable member as in the example embodiment shown in FIG. 6, a locator system 300 formed in accordance with various principles of the present disclosure may have an expandable member in the form of a stent, as shown in FIGS. 7 and 8. Similar to the example embodiment shown in FIG. 6, the illustrated example embodiment of the locator system 300 shown in FIGS. 7 and 8 has a beacon 310 and an expandable tissue engaging member 320 mounted on a flexible elongate member 330. The beacon 310 is distal to the tissue engaging member 320, although the reverse configuration is within the scope and spirit of the present disclosure. Additionally, the locator system 300 includes a sheath 340 that extends over at least the tissue engaging member 320 in a delivery configuration, as shown in FIG. 7, for example, to protect the tissue engaging member 320 and / or maintain a compact delivery configuration as the expandable tissue engaging member 320 is delivered to the target site TS through the delivery system 1000. In some embodiments, the beacon 310 may be delivered distal to the sheath 340. 8, once the beacon 310 is delivered to the target site TS, the sheath 340 is retracted proximally, allowing the expandable tissue engaging member 320 to expand and contact the tissue wall of the target site TS (e.g., the interior of the jejunum J). In this manner, the delivery system 1000 can be withdrawn from the target site TS and located for further procedures without disturbing the location where the tissue engaging member 320 secures the beacon 310, in accordance with various principles of the present disclosure. The sheath 340 can be advanced distally over the tissue engaging member 320 to return the tissue engaging member 320 to a compact configuration, remaining in place for withdrawal and removal from the target site TS, such as upon completion of a procedure performed on the target site TS.

[0042] The tissue engaging member 320 may be a self-expanding device, such as a stent, known or previously known to those skilled in the art. For example, the strut members may be formed of a shape memory or heat formable material (e.g., Nitinol or Elgiloy™) such that the tissue engaging member 320 returns to a preformed expanded configuration from a contracted configuration that maintains the tissue engaging member 320 in a compact delivery configuration upon retraction of the sheath 340. More specifically, the expandable tissue engaging member 320 may be formed in a variety of ways, such as from one or more strut members combined to form a rigid and / or semi-rigid stent structure. The strut members may be formed by braiding, wrapping, intertwining, interweaving, weaving, knitting, looping (e.g., bobbinette style), knotting, etc., one or more wires or filaments to form an expandable and contractible scaffolding configuration.The wires or filaments may be made of a variety of non-limiting, preferably biocompatible materials, including, but not limited to, polypropylene, polyester, polysulfone, nylon, polyurethane, polystyrene, polyethylene (PE) (including high density PE and low density PE), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate, polyether ether ketone (PEEK), poly(methyl methacrylate) (PMMA), polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE), polyisoprene (PPE ... Polyethylene (PTFE), ethylene tetrafluoroethylene (ETFE), fluorinated ethylene propylene (FEP), polyoxymethylene (POM), polyether block esters, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyether esters, ether- or ester-based copolymers (e.g., butylene / poly(alkylene ether) phthalates and / or other polyester elastomers, polyamides, ethylene vinyl acetate copolymers (EVA), silicones, polyethylene naphthalate (PEN), polyimides (PI ), polyetherimide (PEI), polyphenylene sulfide (PPS), polyphenylene oxide (PPO), polyparaphenylene terephthalamide, perfluoro(propyl vinyl ether) (PFA), ethylene vinyl alcohol, polyolefins, epoxies, poly(styrene-b-isobutylene-b-styrene), polycarbonates, ionomers, and the like, mixtures, combinations, and copolymers thereof; metals, such as stainless steel, nickel-titanium alloys such as Nitinol, or cobalt-chromium-nickel alloys such as Elgiloy™. Bioabsorbable or biodegradable materials, such as polyglycolic acid, lactic acid, poly(lactic-co-glycolic acid), caprolactone, polymers, polydioxanone, feline or bovine intestine, natural fibers, such as silk or cotton, or mixtures, composites, combinations, copolymers, or co-structures of any of the above. Alternatively, the strut members may be formed by cutting (e.g., laser cutting) a tubular structure (e.g., an optionally monolithic cylindrical tubular member) into an expandable configuration, with the cutting forming the strut members.Such tubular members may be formed from any suitable material from those listed above, as would be understood by one of ordinary skill in the art.

[0043] Instead of an expandable member, a tissue engaging member of a locator system formed according to various principles of the present disclosure can engage tissue by gripping the tissue at the target site TS. For example, in the example embodiment of the locator system 400 shown in Figures 9 and 10, the beacon 410 is delivered proximal to the tissue engaging member 420, and the gripping arms 422 of the tissue engaging member 420 extend distally to the distal end 401 of the locator system 400 to engage tissue at the target site TS. As shown in Figures 9 and 10, the beacon 410 is attached to a flexible elongate member 430 (e.g., a braided hollow shaft), which can also deliver the beacon 410 to the target site TS (e.g., via a working channel or lumen in the delivery system 1000). The controller 440 can operatively engage the gripping arms 422 to shift the gripping arms 422 between a closed configuration for delivery (as shown in FIG. 9 ) and an open configuration (as shown in FIG. 10 ) in which the gripping arms 422 engage tissue at the target site TS between them along their distal ends 421. In some embodiments, the gripping arms have one or more additional gripping features, such as a serrated or crenulated profile 429, or teeth along the distal ends 421 and / or along their edges. Once tissue at the target site TS is located between the gripping arms 422, the controller 440 can be actuated to shift the gripping arms 422 to a closed configuration in which the gripping arms 422 together grip the tissue between them. Thereafter, in accordance with various principles of the present disclosure, the delivery system 1000 can be withdrawn from the target site TS without disturbing the location where the tissue engaging members 420 secure the beacon 410, and identify its location for further treatment. The controller 440 may be actuated to return the gripping arms 422 to the delivery configuration to withdraw the tissue engaging member 420 from the target site TS, such as when a procedure performed on the target site TS is complete.

[0044] In the example embodiment of the tissue engaging member 420 shown in Figures 9 and 10, the gripping arms 422 are rotatably coupled on pivot 425a. In some embodiments, the proximal end 423 of the gripping arms 422 are rotatably coupled to the distal end 427 of the actuator arm 424 about pivot 425b. The proximal ends 429 of the actuator arms 424 may be coupled to each other about a further pivot 425c or along a uniform curvature within the distal end 431 of the flexible elongate member 430. A spring 442 may be disposed between the pivot 425a (about which the gripping arms 422 are coupled) and the proximal end 403 of the tissue engaging member 420 to hold the tissue engaging member 420 in the closed configuration shown in Figure 9. Retracting the actuator 440 proximally moves the pivot 425a (about which the gripping arms 422 are coupled) closer to the proximal end 403 of the tissue engaging member 420, causing the actuator arms 424 to rotate and shift the gripping arms 422 to the open configuration shown in FIG. 10. In such an embodiment, the spring 442 may be configured to bias the tissue engaging member 420 to the closed configuration such that the tissue engaging member 420 returns to the closed configuration when the proximal force on the actuator 440 is released. Alternatively or additionally, the proximal ends 429 of the actuator arms 424 may be coupled together along a uniform curvature that forms a spring that biases the actuator arms 424 away from one another when extended distally from within the distal end 431 of the sheath 430. As shown in Figure 9, the distal end 431 of the sheath 430 holds the actuator arm 424 in a closed configuration, which in turn holds the gripping arm 422 in a closed configuration. Distal advancement of the actuator 440 advances the proximal end 429 of the actuator arm 424 out of the distal end 431 of the sheath 430, allowing the gripping arm 422 to move to the open configuration shown in Figure 10. In such an embodiment, the spring 442 may bias the gripping arm 422 to the open configuration, or the spring 442 may be absent and the gripping arm 422 may be pulled back into the sheath 430 and closed.It will be understood that other configurations of gripper arm 422 and controller 440 are within the scope and spirit of the present disclosure, and that the present disclosure is not limited to the configurations of the example embodiments shown in FIGS.

[0045] In view of the above, and in accordance with various principles of the present disclosure, as described above, a locator system is delivered and deployed to a target site in a manner that allows the delivery system to be withdrawn without disturbing the locator system, i.e., without affecting the position at which the locator system is deployed at the target site. A procedure can then be performed on the target site using a tool at another anatomical location within the body with the aid of a visualization device that can identify the target site by locating the beacon of the locator system.

[0046] Although embodiments of the present disclosure may be described with particular reference to medical devices and systems (e.g., endoscopic devices, accessory tools, and / or guidewires) used in the GI system, it should be understood that the locator devices and systems described herein may be used with a variety of medical procedures performed in the anatomical structures of ducts, lumens, vessels, or body lumens, including, for example, interventional radiology procedures, balloon angioplasty / angiography procedures, thrombolysis procedures, urological or gynecological procedures, etc. Medical devices herein include various medical devices for navigation within body lumens, such as, for example, catheters, ureteroscopes, bronchoscopes, colonoscopes, arthroscopes, cystoscopes, hysteroscopes, etc. Additionally, the disclosed medical devices and systems may be inserted via a variety of access points and approaches, such as percutaneous, endoscopic, laparoscopic, or combinations thereof.

[0047] It will be understood that the foregoing description is broadly applicable and is presented for purposes of illustration and explanation, and is not intended to limit the disclosure to the form disclosed herein. It will 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 the disclosure. In particular, it will be apparent to those skilled in the art that the principles of the disclosure can be embodied in other forms, structures, arrangements, proportions, and with other elements, materials, and components without departing from the concept, spirit, scope, or characteristics thereof. For example, various features of the disclosure are grouped into one or more aspects, embodiments, or configurations for the purpose of streamlining the disclosure. However, it should be understood that various features of a particular aspect, embodiment, or configuration of the disclosure may be combined in alternative aspects, embodiments, or configurations. Although the disclosure is presented in terms of embodiments, it should be understood that not all such individual features need be present to achieve at least some of the desired properties and / or advantages of the subject matter of the invention or its various individual features. Those skilled in the art will appreciate that the present disclosure may be used with many changes or modifications in structure, arrangement, proportions, materials, components, and other features specifically adapted to particular environments and operating requirements without departing from the principles, spirit, or scope of the present disclosure used to practice the disclosure. For example, elements shown to be integrally formed may be composed of multiple parts, elements shown as multiple parts may be integrally formed, operations of elements may be reversed or otherwise modified, and sizes or dimensions of elements may be changed. Similarly, even if operations, actions, or steps are described in a particular order, it should not be understood that such a particular order is required, or that all operations, actions, or steps must be performed in order to achieve desirable results. Moreover, other implementations are within the scope of the following claims. In some cases, desirable results may be achieved by performing the actions recited in the claims in a different order.The embodiments disclosed herein are therefore to be considered in all respects as illustrative and not restrictive, and the scope of the claimed subject matter is indicated by the appended claims and is not limited to the foregoing description or the specific embodiments or configurations described or illustrated herein. In light of the above, the individual features of any embodiment may be used and claimed separately or in combination with features of that embodiment or other embodiments, and the scope of the inventive subject matter is indicated by the appended claims and is not limited to the foregoing description.

[0048] From the foregoing description and the following claims, it will be understood that: The terms "at least one," "one or more," and "and / or," as used herein, are open-ended expressions that function both as conjunctions and disjunctions. Terms such as "one," "the," "said," "first," "second," and the like do not exclude plurals. For example, the term "one" as used herein refers to one or more of its entities. Thus, the terms "one," "one or more," and "at least one" can be used interchangeably herein. All directional references (e.g., proximal, distal, upper, lower, upward, downward, left, right, lateral, longitudinal, front, rear, top, bottom, above, below, vertical, horizontal, radial, axial, clockwise, counterclockwise, and / or the like) are used solely for identification purposes to aid the reader's understanding of this disclosure and / or serve to distinguish regions of associated elements from one another and do not limit the associated elements, particularly with respect to position, orientation, or use of this disclosure. Connection references (e.g., attached, coupled, connected, engaged, joined) should be interpreted broadly and may include intermediate members between collections of elements and relative movement between the elements, unless otherwise specified. Thus, connection references do not necessarily imply that two elements are directly connected and in a fixed relationship to each other. Distinguishing references (e.g., primary, secondary, first, second, third, fourth, etc.) do not imply importance or priority, but are used to distinguish one feature from another.

[0049] The following claims are incorporated by reference into this detailed description, with each claim standing on its own as a separate embodiment of the present disclosure. In the claims, the term "comprising" does not exclude the presence of other elements, components, features, regions, integers, steps, operations, etc. Furthermore, although individual features may be included in different claims, they may be advantageously combined, and their inclusion in different claims does not imply that a combination of features is not feasible and / or advantageous. Furthermore, a reference in the singular does not exclude a plural. Reference signs in the claims are provided merely as an illustrative example and shall not be construed as limiting the scope of the claims.

Claims

1. A flexible elongated member; a beacon attached to the flexible elongate member; and tissue engaging member wherein the tissue engaging member is configured to engage tissue at a target site to secure the locator system relative to the target site.

2. The locator system of claim 1 , wherein the tissue engaging member is expandable to engage tissue at a target site to secure the locator system relative to the target site.

3. The locator system of claim 2 , wherein the tissue engaging member is an inflatable balloon or an expandable stent.

4. The locator system of claim 1 or 2, wherein the tissue engaging member is mounted on the flexible elongate member.

5. The locator system of claim 1 , wherein the tissue engaging member comprises a pair of grasping arms configured to grasp tissue at a target site therebetween.

6. The locator system of any one of claims 1 to 5, further comprising a controller extending along the flexible elongate member and operable to shift the tissue engaging member between a delivery configuration and a tissue engaging configuration.

7. The locator system of claim 6 , wherein the tissue engaging member is expandable and the controller is an inflation lumen through the flexible elongate member.

8. The locator system of claim 6 , wherein the tissue engaging member is inflatable and the controller is an inflation lumen in an inflation line extending along the flexible elongate member.

9. the controller being a sheath extending around the flexible elongate member; The locator system of claim 6 , wherein the tissue engaging member is an expandable stent disposed within the controller in the delivery configuration and expandable to a tissue engaging configuration when external to the controller.

10. The locator system of claim 6 , wherein the tissue engaging member comprises a pair of grasping arms configured to grasp tissue at a target site therebetween.

11. A locator system and its delivery system, Beacon, A tissue engaging member; and a controller operable to shift the tissue engaging member between a delivery configuration, in which the tissue engaging member is compact and transluminally deliverable to a target site, and a tissue engaging configuration, in which the tissue engaging member engages tissue at the target site to secure the beacon relative to the target site; A locator system and its delivery system.

12. The locator system and delivery system of claim 11 , further comprising a flexible elongate member to which the beacon and tissue engaging member are attached.

13. 12. The locator system and delivery system thereof of claim 11, wherein the tissue engaging member is an inflatable balloon and the controller is an inflation lumen in communication with the balloon.

14. the controller is a sheath; The locator system and delivery system thereof of claim 11 , wherein the tissue engaging member is an expandable stent shiftable between a delivery configuration when within the sheath and an expanded, tissue engaging configuration when outside the sheath.

15. The locator system and delivery system thereof of claim 11, wherein the tissue engaging member includes a pair of jaws movable by the controller between a closed configuration in which the jaws are in a delivery configuration or grasp tissue between the jaws, and an open configuration in which the jaws can engage tissue between the jaws.

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