35 results about "Meatal stenosis" patented technology

The present invention is of system, device, and method for detection, localization, and characterization of plaque-induced stenosis of a blood vessel. More particularly, the present invention relates to a balloon catheter having an expandable balloon insertable into a blood vessel, which balloon comprises a plurality of pressure sensors operable to detect stenosis of the vessel, and further operable to report degrees of compressibility of stenotic regions of plaque within the vessel, thereby distinguishing between standard and vulnerable plaque.

New devices, systems, and methods are disclosed for preventing, treating, and / or at least minimizing ischemia and / or reperfusion injury by restoring and / or modulating blood flow, particularly in the cerebral vasculature where blood vessels are narrow and tortuous. These devices, systems, and methods make it possible for a clinician to adequately and systematically restore blood flow to ischemic tissue while simultaneously modulating the blood flow to minimize reperfusion injury. New thrombectomy devices and systems, which, for example, expand with greater radial force, further enable improved binding with clots and restoration of blood flow.

An expandable and retrievable device for treatment of a stenotic lesion in a body vessel is disclosed. The device comprises a tubular portion including a proximal end and a distal end extending from the proximal end. The tubular portion has a lumen formed therethrough between the proximal and distal ends. The device further comprises an expandable member formed helically about the tubular portion. The expandable member is configured to helically close, defining a collapsed state for delivery of the device. The expandable member is configured to helically open, defining an expanded state for treatment of the stenotic lesion in the body vessel. The expandable member has at least one filter portion that helically extends from the tubular portion at a predetermined angle. This defines a proximally faced opening when the expandable member is in the expanded state.

An embolic protection device for capturing emboli during treatment of a stenotic lesion in a body vessel is provided. The device includes an inflatable frame having a deployed state and an undeployed state and a filter attached to the inflatable frame for capturing emboli. The inflatable frame includes a distal portion having a predetermined shape and extending freely to a closed distal end when the inflatable frame is in the deployed state. The filter includes a lip attached to the inflatable frame to define an open end of the filter when the inflatable frame is in the deployed state, a body extending from the lip and disposed about the inflatable frame, and a closed tail configured to capture the emboli during treatment of the stenotic lesion.

A system for enabling the insertion and removal of an embolic protection device, for capturing and retaining embolic debris which may be created during the performance of a therapeutic interventional procedure in a stenosed or occluded region of a blood vessel. The system, in an embodiment thereof, enables the device to be compressed for insertion thereof through a patient's vasculature so as to cross the stenosis in a low profile, and to enable release of compression thereof for expansion and deployment of the device at a location distal to the interventional procedure site.

A method and device to repair a stenosis in a blood vessel is provided. The medical device has a tubular member and a frame. The frame may be expanded or contracted while maintaining its generally cylindrical configuration. The medical device is retained in a contracted state inside an introducer sheath. The introducer sheath is guided through the stenosis such that a first end of the medical device is located distal the stenosis. The introducer sheath is retracted relative to the medical device, such that the first end of the stent expands to engage the blood vessel distal the stenosis. A mid-portion of the medical device engages the plaque of the stenosis trapping any emboli against the wall of the vessel. The second end expands to engage the blood vessel proximal to stenosis.

Embodiments of the present invention provide a method for treatment of nonvascular body lumen strictures such as benign prostatic hyperplasia (BPH), urethral strictures, ureteral strictures, prostate cancer, esophageal strictures, sinus strictures, biliary tract strictures, asthma and chronic obstructive pulmonary disease (COPD). The method involves delivering, preferably via drug coated balloon catheters, of anti-inflammatory and anti-proliferative drugs (rapamycin or paclitaxel and their analogues) and one or more additives.

Embodiments of the present invention provide a method of treating a stricture in a nonvascular body lumen such as urethral strictures, benign prostatic hyperplasia (BPH) strictures, ureteral strictures, esophageal strictures, sinus strictures, and biliary tract strictures. Embodiments of the present invention provide a method for treating at least one of benign prostatic hyperplasia (BPH), prostate cancer, asthma, and chronic obstructive pulmonary disease (COPD). The method can include delivering, for example, via drug coated balloon catheters, anti-inflammatory and anti-proliferative drugs (e.g., rapamycin, paclitaxel, and their analogues) and one or more additives.

Embodiments of the present invention provide a method for treatment of nonvascular body lumen strictures such as benign prostatic hyperplasia (BPH), urethral strictures, ureteral strictures, prostate cancer, esophageal strictures, sinus strictures, biliary tract strictures, asthma and chronic obstructive pulmonary disease (COPD). The method involves delivering, preferably via drug coated balloon catheters, of anti-inflammatory and anti-proliferative drugs (rapamycin or paclitaxel and their analogues) and one or more additives.

An embolic protection device for capturing emboli during treatment of a stenotic lesion in a body vessel is disclosed. The device comprises a basket and a filter attached to the basket. The basket has a deployed state and an undeployed state. The basket includes a reticulated body having an outer diameter. The reticulated body includes a plurality of struts connected together in a singly staggered configuration distally along a longitudinal axis to a distal end. The plurality of struts of the reticulated body is configured to fold along the longitudinal axis. The basket has a proximal stem proximally extending from the body. The filter portion has a lip attached to the distal end defining an opening of the filter portion when the basket is in the deployed state for capturing emboli. The filter portion extends from the lip to a filter end.

The present disclosure provides a method for predicting the healthy radius of a blood vessel path, a method for predicting the candidate stenosis of the blood vessel path, and a blood vessel stenosisprediction device. The method for predicing the health radius includes steps of: acquiring the blood vessel radius of the blood vessel path; detecting a peak value of the blood vessel radius of the blood vessel path by using a processor; and predicting the healthy radius by performing regression on the radius peak value by using the processor. The blood vessel stenosis prediction device includes aprocessor configured to execute an executable instruction to: acquire an image unit along a centerline within a candidate stenosis range of each blood vessel path, and determine, by using a learningnetwork based on the acquired image unit, the stenosis of each blood vessel path, wherein the learning network formed based on a convolutional neural network and a recurrent neural network. The devicecan automatically determine the candidate stenosis, detect the stenosis of the candidate stenosis range, can significantly reduce the calculation load, improves the detection efficiency and effectively avoids missed detection.

The invention discloses a medical stent type supporting balloon and a covered stent. The medical stent type supporting balloon comprises a flexible cavity body and a closed pipeline, wherein an operating passage is arranged in the cavity body; the closed pipeline is arranged on the cavity body, the closed pipeline at least respectively extends for a distance on the cavity body along the circumferential direction and the axial direction of the operating passage and at least comprises a gas or liquid injecting opening, and after gas or liquid is injected into the closed pipeline via the injecting opening, expansionary force is generated in the circumferential direction and the axial direction of the operating passage of the cavity body, so the cavity body opens to form the operating passage. The invention can form effective support in the operating passage in the human body established for an operation, and simultaneously effectively avoids the damage on internal tissues and avoids the occurrence of discomfort. The invention also can be used as a water injection type covered stent, provides support in tumor neck remodeling operation in a blood vessel stenosis molding operation or a broad carotid aneurysm embolization operation and keeps the unobstructed flow of parent artery blood.

A diaper and method for improving male genital health, the diaper including a non-absorbent insert positioned on an inner surface of an inner layer in the proximity of a front region thereof such that when the diaper is worn by a male wearer the insert is positioned adjacent the penis of the male wearer. In the method, a non-absorbent insert is interposed between the meatus and the absorbent diaper to prevent undesired drying of the meatus which can lead to meatal stenosis and related complications. In a further aspect of the diaper and method, the insert may be coated or impregnated with moisturizing agents and / or therapeutic agents.

An implantable drainage device for treatment of a stricture of a body vessel is disclosed. The device comprises a drainage tube including an inlet and extending to an outlet to define a drainage lumen formed through the inlet and the outlet. The drainage tube includes a swell layer and a cast layer formed about the swell layer. The swell layer has a first agent dispersed thereabout for regulated drug elution through the cast layer. The cast layer has a second agent disposed thereabout for drug elution therefrom.

A device for capturing emboli during treatment of a stenotic lesion in a body vessel is disclosed. The device comprises a base having expanded and collapsed states, and proximal and distal portions. The distal portion has a support portion configured to deploy in the body vessel when the base is in the expanded state. The device further comprises a filter portion disposed on the distal portion of the base. The filter portion includes a lip extending to a filter body to a filter end. The filter portion is configured to engage the support portion when deployed to define an opening of the filter portion for capturing emboli. The device further comprises a collector through which the base is slideably disposed for delivery and retrieval of the device.

The invention relates to the technical field of medical monitoring, in particular to a blood flow velocity monitoring device and method based on a carotid artery stent. The monitoring device includesthe carotid artery stent, a flexible circuit board and external processing equipment, the carotid artery stent is used as an antenna, the flexible circuit board is provided with two integrated circuits, a mounting barrel is closed at the upper end, the own health condition can be clearly known, and when the stenosis or blockage of own blood vessels occurs, more accurate hemadostenosis lesion locations can be provided for doctors; and by inserting the mounting barrel into a round hole, a round ring is attached to the vessel wall, then the carotid artery stent and the round ring are attached andfixed to the vessel wall together through a femoral artery cannula in a minimally invasive surgery way, thus a blood flow velocity sensor and a blood pressure sensor are installed more conveniently in a more minimally invasive mode, and then surgical risks and complications are lowered.

The invention discloses a vascular stent suitable for arterial vessels. The vascular stent comprises an injector and an implanted balloon and further comprises an expanding mechanism and a medicine supplying mechanism. The expanding mechanism is constituted by a stent body, a beam frame, a connecting ring and an elastic frame. The medicine supplying mechanism is constituted by a medicine supplyingframe, a connecting frame and a reinforcing frame. According to the vascular stent suitable for the arterial vessels, the structure is ingenious, and the function is powerful. Firstly, through designof the expanding mechanism, narrow areas of the vessels of a patient can be expanded advantageously by a medical worker, and thus smooth circulating of subsequent blood is guaranteed, secondly through the cooperation effect of the built-in medicine supplying mechanism, medicine can be permeated in surrounding vascular wall tissues slowly, and finally, the situation that the vessels are blocked again due to tissue proliferation is effectively prevented, the therapeutic effect is improved greatly, complications are reduced, and clinical application and popularization are facilitated.

The invention discloses a balloon catheter. The balloon catheter comprises a balloon capable of dilating and deforming and a conveying tube used for conveying the balloon to a hemadostenosis part and communicated with an inner cavity of the balloon, wherein a groove used for being matched with the hemadostenosis part after the balloon is full is formed in the middle of the balloon. The hemadostenosis part is located in the groove, two ends of the balloon are well attached to blood vessel lumens at two ends of the hemadostenosis part, the stability of the balloon can be improved, axial limitation is increased, axial displacement is avoided, and positioning accuracy is realized.

An expandable and retrievable device for treatment of a stenotic lesion in a body vessel is disclosed. The device comprises a tubular portion including a proximal end and a distal end extending from the proximal end. The tubular portion has a lumen formed therethrough between the proximal and distal ends. The device further comprises an expandable member formed helically about the tubular portion. The expandable member is configured to helically close, defining a collapsed state for delivery of the device. The expandable member is configured to helically open, defining an expanded state for treatment of the stenotic lesion in the body vessel. The expandable member has at least one filter portion that helically extends from the tubular portion at a predetermined angle. This defines a proximally faced opening when the expandable member is in the expanded state.

A filtering device for capturing and removing embolic debris from a body vessel and a system for insertion and removal of the filtering device to facilitate an interventional procedure in a stenosed or occluded region of a body vessel. The filtering device is adapted to be expandable in the body vessel, allowing blood to pass therethrough while maintaining apposition with the body vessel wall and capturing embolic material released into the bloodstream during the interventional procedure, and to be collapsible to remove the captured embolic material from the body vessel. The filtering device includes a guidewire, an expandable cage assembly secured to the guide wire, filter material secured to the expandable cage assembly, and at least one hinge, the hinge allowing the expandable cage assembly to bend independent from the guide wire. The system, which includes a delivery sheath and filtering device, is adapted to retain the expandable cage assembly in a collapsed condition and deliver and deploy the filtering device at a location in the body vessel distal the treatment site.

The invention discloses a cardiovascular intervention catheter device. The cardiovascular intervention catheter device comprises a catheter head, a catheter middle part and a control device and is characterized in that the catheter head comprises a liquid guide device, puncture devices and diverters, the catheter middle part is provided with an air bag, a controller controls the puncture devices and the diverters through steel wires, the air bag is inflated through a pushing device arranged in the controller, and the liquid guide device conveys liquid through a liquid pushing device arranged in the controller. The cardiovascular intervention catheter device has the advantages that the cardiovascular intervention catheter is used as the intravascular stent, thrombolysis liquid drugs are released through the liquid guide device, the catheter can easily pass the narrow parts of blood vessels, the puncture devices can help puncture thrombolysis cells to allow the liquid drugs to fast seepto thrombi, the pushing device can precisely control the speed of the catheter entering the body of a patient, and blood in blood vessels can normally flow when the spiral air bag is in an open state.

The invention discloses a stent for near bifurcation part lesion. The stent is a tubular stent formed with a plurality of wavy supporting pieces which are axially connected together. The tubular stentcomprises a near end supporting mechanism, a middle area supporting mechanism and a far end supporting mechanism in sequential connection. The middle area supporting mechanism and the far end supporting mechanism are each of an annular structure. The near end supporting mechanism comprises a peripheral supporting part connected with the middle area supporting mechanism and a positioning supporting part arranged at the near end of the peripheral supporting part. The periphery supporting part is of an annular structure. The positioning supporting part is of a structure with a ring formed peripherally and the near end face not flushed so that the peripheral local support can be formed. By means of the stent close to blood vessel bifurcation suitable for hemadostenosis or occlusive lesion, the problem that after an existing blood vessel stent is implanted in a branch blood vessel, the lesion position cannot be completely covered or the stent protrudes into a main blood vessel, so complications are caused to lateral blood flow is solved.

The invention discloses a coronary artery stenosis dual-judgment method based on cross section deformation geometric information. The coronary artery stenosis dual-judgment method comprises the following steps that 1, coronary artery reconstruction is conducted; 1.1, calculating a tangent line at the central line point of the blood vessel; 1.2, reconstructing a blood vessel section: acquiring a blood vessel cross section contour taking a blood vessel advancing direction as a normal line in the three-dimensional coronary CT angiography image; 2, judging coronary artery stenosis; 2.1, first judgment is carried out, and suspicious narrow sections are detected; 2.2, second judgment is carried out, specifically, the stenosis level of the blood vessel section is judged, and comprehensive analysis is carried out on detection data on the whole blood vessel. According to the coronary artery stenosis dual judgment method based on the cross section deformation geometric information, geometric shape information of blood vessels such as the center line point position, the blood vessel cross section stenosis position, the blood vessel cross section concave-convex property and the concave-convexdegree is fully considered, the blood vessel stenosis is accurately judged, and the defects of a traditional algorithm are effectively overcome.

The present invention relates to improved assessment of a stenosis in a blood vessel in a body by comparing hemodynamic properties of the stenosed blood vessel with a substantially symmetric different blood vessel in the same body.

The invention discloses an auxiliary catheter for guiding the delivery of an endovascula stent to provide a safe channel free of propelling resistance for stent delivery in interventional therapy. The auxiliary catheter for guiding the delivery of the endovascula stent is provided with a tubular catheter body, wherein the hardness of the catheter body becomes smaller gradually from the near end to the far end, the far end of the catheter body is an oblique incision, the far end of the oblique incision is connected with the near end of a guide wire which is a stainless steel wire or a nitinol wire and is 2 mm - 12 mm long, and the diameter of the guide wire is 0.2 mm - 0.4 mm. Compared with the prior art, the auxiliary catheter has the advantages that the far end of the guide wire is filiform, has high penetrating power and can efficiently puncture and pass through a severe narrow tortuous, or calcified or CTO diseased region, the far end of a passing section connected with the guide wire is an oblique incision so that a hemadostenosis region can be passed through conveniently and cutting of a diseased region can be achieved, and cut-down thrombi or plaques are sucked to provide the safe channel free of propelling resistance for stent delivery.

The invention discloses a preparation method of a super-hydrophobic blood vessel stent for repairing angiorrhexis, relating to a preparation method of a blood vessel stent. The method comprises the following steps of: degreasing a pipe-net-shaped blood vessel stent and drying after alkali washing and water washing; placing into a perfluoroalkyl siloxane solution to soak to obtain a super-hydrophobic pipe-net-shaped blood vessel stent; soaking into a drug eluting solution, and drying in vacuum to obtain the super-hydrophobic blood vessel stent. The invention realizes minimal invasion for simultaneously repairing angiorrhexis and treating diseases such as angiostenosis and the like for the first time. The surface of the super-hydrophobic blood vessel stent for repairing angiorrhexis, prepared with the method provided by the invention, is coated with hemostatics, blood cannot exude through the vessel wall at the treatment stage of an angiorrhexis part; after the treatment on the angiorrhexis part is finished, the stent allows blood to freely pass under the excitation of external factors to supply blood to vessels around the stent, not only can realize minimally invasive treatment on angiorrhexis, without influencing blood supply to the surrounding vessels, but also can finish treatment on angiostenosis diseases such as the coronary atherosclerotic heart disease and the like.

An agent for the prophylaxis and treatment of vascular constriction is provided, which contains a compound having a Rho kinase inhibitory activity. In particular, a compound having a Rho kinase inhibitory activity, for example, (+)-trans-4-(1-aminoethyl)-1-(4-pyridylcarbamoyl)cyclohexane, suppresses regenerative intima proliferation after disorder of blood vessel and has various other actions. Therefore, it is useful as an agent for the prophylaxis and treatment of vascular constriction, specifically, an agent for the prophylaxis and treatment of vascular constriction induced by disorder of vascular wall, such as vascular restenosis that occurs after an operation of percutaneus transluminal coronary angioplasty, vascular restenosis that occurs after an operation of percutaneus transluminal angioplasty, vascular constriction that occurs after vascular reconstruction, such as DCA, operation of intravascular indwelling of stent and the like, and vascular constriction that occurs after organ transplantation.

The invention relates to a stent for angiostenosis. The stent is an arch-shaped flared balloon expandable stent; the front end of the stent is a large opening, and the rear end of the stent is a smallopening; the stent consists of a plurality of annular supporting members and connecting pieces; the plurality of annular supporting members are arrayed in the axial direction; adjacent annular supporting members are connected by the connecting pieces; the annular supporting members consist of a plurality of unit waves with the same shape; the interval between the unit waves of the annular supporting members is gradually reduced from the front end to the rear end of the stent; the unit waves of the annular supporting members are intensive. The invention also provides a matched dilated ballooncatheter. The stent has the advantages that the stent is specially designed for the angiostenosis and is in an arc-shaped flared shape. The dilated stent disclosed by the invention better accords withanatomical features of child angiostenosis treatment and obtains optimal treatment effects.

The invention patent is a new type of coronary artery stent, which belongs to the innovative technology in the field of medical devices. The coronary stents currently on the market are all uniform cylindrical structures. When the coronary branch vessels or bifurcated vessels need to be stented, due to the relatively complex structure and the beating heart, it is almost impossible to insert a stent in the coronary artery. A stent was placed at the mouth of the arterial branch. The main body of the coronary branch stent with positioning ring moves toward the branch along the branch guide wire, and the positioning ring at the proximal end of the stent slides to the main branch along the main branch guide wire; when the stent reaches the bifurcation of the main branch and the branch, the stent main body has entered the branch, and the proximal Due to the existence of the positioning ring, the end is accurately stuck at the bifurcation, and the bracket can be accurately positioned at the mouth of the branch. The new stent will be innovatively improved for the treatment of branch lesions and the current treatment technology for bifurcation lesions.