128results about "Oesophagi" patented technology

A surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

A stent device includes a stent formed in a tubular shape by weaving wires and a cover covering at least a part of the stent. The cover is partially bonded to parts rather than a whole surface of the stent.

A delivery system for delivering an implant having both a rigid portion and a flexible portion to a body lumen. The delivery system includes an outer tubular member and an inner tubular member slidably disposed within the lumen of the outer tubular member. The inner tubular member includes at least one opening positioned in a side wall adjacent to a distal end region. An expandable implant, including a rigid portion and a flexible portion, is disposed about the outer surface of the inner tubular member. A distal portion of a thread is wrapped around the flexible portion of the implant and configured to maintain the flexible portion in a radially collapsed configuration during delivery of the implant. A distal end region of the outer tubular member is disposed around the rigid portion of the implant to maintain the rigid portion in a radially collapsed configuration during delivery of the implant.

A surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

A surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

The invention provides a 4D printing esophageal stent and a preparation method thereof. The esophageal stent comprises a stent main body and a drug-loaded fiber membrane with a core-shell structure, the stent main body is a tubular stent composed of a bionic water lily hollow structure; the diameters of the head end and the tail end of the support body are larger than the diameter of the middle section, and barb structures are arranged on the outer surfaces of the head end and the tail end. The stent main body is a biodegradable shape memory polymer; the drug-loaded fibrous membrane is positioned on the outer surface of the middle section of the stent main body, and the drug-loaded fibrous membrane contains drugs. The 4D printing esophageal stent provided by the invention has excellent compressive bearing capacity and anti-slip capacity, and the drug-loaded fibrous membrane can avoid esophageal restenosis through long-term uniform slow release of drugs, so that the life safety of a patient can be further guaranteed.

An illustrative endoluminal implant having an elongated tubular member. The elongated tubular member having a stent and a retrieval suture interwoven with the stent. The retrieval suture including a first suture loop extending about a circumference of the stent and adjacent to a suture retrieval loop and a second suture loop extending about a circumference of the stent and longitudinally spaced from the first suture loop. The first and second suture loops coupled via one or more interconnecting segments. At least one of the first or second suture loops has an arc length of less than 270° of the circumference of the stent.

A medical device for treating a body lumen, such as a medical stent, includes an expandable scaffold configured to shift from a radially collapsed state to a radially expanded state. The stent includes a coating disposed along the outer surface of the expandable scaffold in which a portion of the coating includes a plurality of anti-migration members and one or more preferential separation regions. Each preferential separation region is configured to permit first and second regions of the coating to separate from one another along the preferential separation region therebetween as the expandable scaffold shifts from the radially collapsed state to the radially expanded state.

Implantable devices—such as stents and rings—that comprise markers for tracking their deployment in a body lumen are disclosed. The markers may be used to monitor progress of expansion of the implantable device, potential migration of the implantable device, and diameters of the body lumen. Markers may be deployed in the body lumen separately from another implantable device to assist tracking of migration of the implantable device. Markers may be placed circumferentially around a wall of a body lumen to track growth of an aneurysm or a stricture.

The gastroesophageal collar being submitted for patent intends to primarily prevent the ascension of the fundus above the diaphragmatic plane and also secondarily to improve the function of the Lower esophageal sphincter, thirdly to reduce occurrences of esophageal reflux and thereby hopefully reducing instances of esophageal cancer. It is estimated as high as %20 of the general population has a hiatal hernia experiencing symptoms of acid reflux and making them at higher risk for esophageal cancer. Currently the standard surgical repair of hiatus is fundoplication. The limitations of fundoplication are its high recurrence rate. It often requires a later second procedure to repair / tighten the fundoplication. By using supple bio-inert materials we intend to create a collar that can be left in place, mechanically preventing the ascension of the fundus and improving LES function. We hope to be the first Collar to prevent hiatal hernia and also improve LES function.

An implant which comprises: a housing having a chamber; and a sensor unit; a first membrane covering the chamber at a first pressure side and a second membrane covering the chamber at a second pressure side; the chamber comprises pressure transfer means being in contact to the first and second membrane and to the sensor unit arranged within the chamber between the first and second membrane, wherein a sensor control unit arranged within the housing; wherein the sensor unit is configured to determine a pressure difference between a pressure at the first pressure side of the chamber and a pressure at the second pressure side chamber of the chamber.

Transluminal stents are disclosed herein. In some embodiments stents within the scope of this disclosure may comprise a first flared end, second flared end, and a middle region disposed between the first and second flared ends. The middle region may comprise a concave, curvilinear shape. The middle region may include a first portion, a second portion, and a circumferential ridge disposed between the first and second portions. The first flared end may include a first inner shoulder extending between the middle region and a first crest, a first opening, and a first outer taper extending between the first crest and the first opening. Methods of using the transluminal stents are also disclosed herein.

The present application relates to the field of medical device technology, and more particularly to a stent system capable of sustained drug delivery. The stent system comprises a coated stent and an infusion catheter. The coated stent is coated with an inner membrane and an outer membrane, forming a liquid reservoir between the inner and outer membranes for storing drugs. The outer membrane is provided with a liquid outlet, through which the drug can seep out, achieving sustained drug release. The liquid outlet of the infusion catheter is inserted into the liquid reservoir to infuse the liquid reservoir. This stent system can achieve sustained drug release, effectively resolving the problem of drug retention during digestive tract drug delivery.

The present invention relates to a stent delivery device having: a first support rod into which a first movable body is inserted; a fixed magnet; and a second support rod into which a second movable body is inserted, wherein a first driving magnet included in the first movable body and a second driving magnet included in the second movable body rotate relative to each other by means of the control of an external magnetic field at a predetermined angle around an axis in a first direction with respect to the fixed magnet, thereby separating a first coupling piece and a second coupling piece from a first coupling groove and a second coupling groove and enabling a stent to unfold.

An implantable device for the treatment of acid reflux disease has a body including an outer surface adapted to rest against a patient's fundus wall. The device, when implanted in the patient, fills a volume in the patient's abdomen in the cardia area and above the cardia of the patient, when standing. The body prevents the cardia from moving through the diaphragm opening into the thorax, thereby preventing reflux by keeping the abdominal pressure supporting the cardia sphincter muscle. The device may be affixed to stomach tissue. The device may also be invaginated or otherwise indirectly secured in position.

To provide, generally, medical devices and medical device delivery, and particularly, medical devices, systems, and methods for delivering a barrier device within a body lumen of a patient, such as the GI tract.SOLUTION: For example, a barrier device may include a distal self-expanding stent. A tubular barrier may have a proximal end, a distal end, and a lumen extending therethrough. The distal stent may be disposed at the distal end of the tubular barrier. An anchoring self-expanding stent may be disposed at the proximal end of the tubular barrier.SELECTED DRAWING: Figure 1

The invention discloses a disposable esophageal stent and an esophageal camera monitoring system, and relates to the technical field of esophageal stent monitoring equipment.The disposable esophageal stent comprises an esophageal stent holding piece, and an esophageal catheter is installed at one end of the esophageal stent holding piece. The esophagus conveying inner pipe is driven to rotate integrally for steering treatment, a light-emitting lamp bead is installed, accurate retention of the upper portion of the esophagus is supported, the effect of a super-large cover is achieved, and the comprehensive monitoring effect during use is improved. According to the invention, the image monitoring terminal is arranged, a unique system is adopted, during overall installation and release, operation is monitored from the oral cavity side, accurate positioning of the support is supported, and corresponding instructions sent by the system are remotely received, checked and processed on site through the installed image monitoring terminal; esophageal image monitoring data management can be realized through internet cloud management and control, and the intelligent level of esophageal image monitoring data management is improved.

To design a stent including both a covered portion, a non-covered portion and a tubular liner.SOLUTION: An expandable medical device comprises a tubular scaffold and a liner. The tubular scaffold includes an inner surface, an outer surface, a first end region, a second end region, a medial region positioned between the first end region and the second end region, and a lumen extending from the first end region to the second end region. The liner is disposed within the lumen of the tubular scaffold. The plurality of first portion of the liner are secured to and directly abut on a plurality of first regions of the inner surface of the tubular scaffold, thereby preventing tissue ingrowth. The plurality of second regions of the inner surface do not directly abut on the liner thereby defining a tissue ingrowth region between the inner surface of the tubular scaffold and an outer surface of the liner.SELECTED DRAWING: Figure 2

The present disclosure relates generally to the field of medical devices and medical device delivery. In particular, the present disclosure relates to medical devices, systems, and methods for delivering a barrier device within a body lumen of a patient, such as the GI tract. For example, a barrier device may include a distal self-expanding stent. A tubular barrier may have a proximal end, a distal end, and a lumen extending therethrough. The distal stent may be disposed at the distal end of the tubular barrier. An anchoring self-expanding stent may be disposed at the proximal end of the tubular barrier.

An apparatus includes a plurality of beads. Each bead includes a housing and a magnet positioned within the housing. The apparatus also includes a plurality of interconnection elements. Each interconnection element movably joins together a corresponding pair of beads. The plurality of beads and the plurality of interconnection elements are sized and configured to form an expandable loop around an anatomical structure in a patient. The apparatus further includes a decoupling element. The decoupling element is positioned along the loop and is configured to selectively release a first portion of the loop from a second portion of the loop in response to application of a threshold force to the at least one decoupling element in a circumferential direction relative to the loop.

The invention relates to a method for estimating a value representative of a first pressure, the first pressure being a fluid pressure in an inflatable element (3) of an implantable medical device (10) comprising a fluid reservoir (5) having a selectively variable volume, the reservoir (5) being able to deform under the effect of a variation in atmospheric pressure, and the inflatable element (3) being in fluid communication with the reservoir (5). The method comprises the steps, implemented by a data processing and control unit (200) of the device, of: a) determining a value representative of a second pressure, the second pressure being a fluid pressure in the reservoir (5); b) estimating the value representative of the first pressure from the value representative of the second pressure and from a parameter (L) that is dependent on a value representative of a maximum variation in fluid pressure in the inflatable element (3) caused by a variation in atmospheric pressure.

To provide an expandable stent having improved anti-migration capability.SOLUTION: A medical device for treating a body lumen, such as a medical stent, includes an expandable scaffold configured to shift from a radially collapsed state to a radially expanded state. The stent includes a coating disposed along the outer surface of the expandable scaffold, where at least a portion of the coating includes a plurality of anti-migration members and one or more preferential separation regions. Each preferential separation region is configured to permit first and second regions of the coating to separate from one another along the preferential separation region therebetween as the expandable scaffold shifts from the radially collapsed state to the radially expanded state.SELECTED DRAWING: Figure 2

The stent device has a stent cover joined to the stent wires forming the stent body at a plurality of junctions distal to the intersection of the stent wires. By apportioning the junctions to the stent wires between the intersection portions, axial flexibility of the stent device is maintained. The stent cover joined by the disclosed junctions helps prevent luminal tissue from penetrating the stent body and occluding the stent, and placement of the junctions joining the stent cover to the stent device provides a change in positive outcomes for the covered stent device and the patient in which the stent device is placed.

A stent system includes a self-expanding endoprosthesis and a stent delivery system including an elongate shaft having an inflatable balloon disposed proximate a distal end, and an endoprosthesis retention element disposed around the self-expanding endoprosthesis and the inflatable balloon. The retention element is configured to constrain the endoprosthesis in a radially collapsed configuration. The retention element is configured to fracture upon inflation of the balloon. The endoprosthesis is configured to exert a first radially outward force in the radially collapsed configuration. The retention element is configured to fracture when a second radially outward force greater than the first is applied to the retention element. The retention element includes a tubular sleeve disposed radially outward of and in intimate contact with the endoprosthesis, wherein the tubular sleeve is configured to break apart when the balloon is shifted toward the inflated configuration.

The present invention relates to a stent for introduction into a hollow organ which can be used to provide vacuum sealing of leaks to specific anatomical regions within the hollow organ for the treatment of anastomotic insufficiency.SOLUTION: The stent comprises a radially expandable body 12 having a wall defining an internal fluid passageway 18, a fluid-tight and flexible first layer 20 covering the surface of the wall along its entire circumference and along a first predetermined area, and an elastic and porous second layer 22 covering the outer surface of the wall along its entire circumference and along a second predetermined area and at least partially covering the first layer 20. Further, the first layer 20 is disposed on the wall surface and extends radially through the wall and / or the second layer 22 is mechanically secured to the body 12.SELECTED DRAWING: Figure 1

An obesity treatment device is provided, the device comprising: at least one operable stretching device implantable in an obese patient and adapted to stretch a portion of the patient's stomach wall and an operation device for operating the stretching device when implanted to stretch the stomach wall portion such that satiety is created.

The application discloses a disposable esophageal stent system, which comprises a stent and a stent delivery device, the stent delivery device comprises an outer sheath, one end of the outer sheath is fixedly connected with a handle, a controller with a display screen is arranged on the side wall of the handle, a middle tube is penetrated through the outer sheath, one end of the middle tube is penetrated through the side wall of the handle and is fixedly connected with a push rod, the other end of the middle tube is fixedly connected with a guide head, the guide head is located at one end of the outer sheath, the stent is compressed and arranged in the inner part of the outer sheath, a push plug is fixedly connected on the middle tube, the push plug is abutted against the side wall of one end of the stent, and a permanent magnetic film strip in a straight line shape is fixedly connected on the side wall of the stent. In the process of releasing the stent, the stent is timely adjusted in the axial rotation direction, so that the stent esophageal stent can be stably released along a straight line, the stent is prevented from being twisted and displaced, and the safety and accuracy of the stent operation are improved.

A bio-compatible material comprising silicone for use in treatment of reflux disease by restricting movement of the cardiac notch of the patient's stomach towards the thoracic diaphragm of the patient by the bio-compatible material being at least partially invaginated by the stomach fundus wall in a position between the thoracic diaphragm of the patient and the fundus wall of the patient.

The present application relates to the field of medical instruments. Disclosed are a gradable detachable digestive tract implant cannula and a digestive tract implant kit. The gradable detachable digestive tract implant cannula has a cannula length of 60-150 cm and has a proximal end and a distal end. At least one low-stress portion is arranged on the cannula at a distance of 30-120 cm from the proximal end. When the cannula becomes obstructed, the low-stress portion can undergo fracture in response to intestinal peristaltic forces. The digestive tract implant kit comprises a scaffold and the gradable detachable digestive tract implant cannula, and the proximal end of the gradable detachable digestive tract implant cannula is connected to the scaffold. When the cannula provided by the present application becomes obstructed, a rear end portion of the cannula can automatically undergo graded detachment in response to intestinal peristaltic forces, thereby avoiding intestinal obstruction caused by the obstruction of the cannula and thus significantly improving the safety of the instrument implanted in the body.

A stent includes a wire woven into a tubular fence to form a stent body, a plurality of tubular units connected around a longitudinal central axis of the stent body, and a plurality of connection sites configured to connect adjacent tubular units of the plurality of tubular units and arranged along a plurality of circumferences with respect to the longitudinal central axis of the stent body. The plurality of circumferences includes a first circumference having a first radius and a second circumference having a second radius, and the first radius is different in length from the second radius.